:root {
    /* 1. Base Colors (Source of truth) */
    --c-bg-0: #100E0B;
    --c-bg-1: #1B1814;
    --c-bg-2: #242019;
    --c-tx-1: #EDE8DF;
    --c-tx-2: #8A8070;
    --c-tx-3: rgba(237, 232, 223, 0.35);
    --c-brd-1: rgba(237, 232, 223, 0.07);
    --c-brd-2: rgba(237, 232, 223, 0.13);
    --c-gold: #C49A3C;
    --c-gold-hover: #B08A32;

    /* 2. Semantic Backgrounds & Borders */
    --bg-base:      var(--c-bg-0);
    --bg-dark:      var(--c-bg-0);
    --bg-surface:   var(--c-bg-1);
    --bg-panel:     var(--c-bg-1);
    --bg-elevated:  var(--c-bg-2);

    --border:       var(--c-brd-1);
    --border-color: var(--c-brd-1);
    --border-mid:   var(--c-brd-2);
    --brd:          var(--c-brd-1);
    --brd2:         var(--c-brd-2);

    /* 3. Text Colors */
    --text-primary:   var(--c-tx-1);
    --text-secondary: var(--c-tx-2);
    --tx:             var(--c-tx-1);
    --tx2:            var(--c-tx-2);
    --tx3:            var(--c-tx-3);

    /* 4. Primary Accents */
    --primary-color:  var(--c-gold);
    --primary-hover:  var(--c-gold-hover);
    --ac:             var(--c-gold);
    --ac-lo:          rgba(196, 154, 60, 0.12);
    --ac-br:          rgba(196, 154, 60, 0.30);

    /* 5. Classification Accents & Status */
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger:  #ef4444;
    --best:           #5A9E60;
    --blunder:        #C84040;
    --mistake:        #D06030;
    --inaccuracy:     #E8A838;

    /* 6. Disabled & Board Colors */
    --tx-disabled:    rgba(237, 232, 223, 0.25);
    --bg-board:       #3D3730;

    /* 7. Z-Index Layers */
    --z-board-coords: 2;
    --z-badge:        10;
    --z-overlay:      200;
    --z-sticky:       999;   /* Text inputs, primary buttons over background */
    --z-sticky-top:   1000;  /* Search button over text inputs */
    --z-modal:        9999;  /* Highest layer for modal overlays */

    /* 8. Game Card Dimensions (홈 최근 게임 박스 높이 계산에 사용) */
    --game-card-height: 64px;
    --game-card-gap:    6px;
}

html {
    /* 브라우저 레벨의 바운스 효과 및 전체 페이지 스크롤 원천 차단 */
    overflow: hidden;
    max-width: 100%;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 의도치 않은 가로 스크롤을 유발할 수 있는 미디어 요소의 폭 제한 */
img, video {
    max-width: 100%;
    height: auto;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #000000; /* PC 배경: 앱 컨테이너와 확실히 구분되도록 순수 블랙 적용 */
    color: var(--text-primary);
    height: 100vh; /* 하위 브라우저용 Fallback */
    height: 100dvh; /* 모바일 브라우저 주소창(동적 뷰포트) 높이 완벽 대응 */
    overflow: hidden; /* 페이지 밖으로 삐져나가는 전체 스크롤 및 하단 빈 공간 노출 차단 */
    max-width: 100vw;
    background-image: radial-gradient(circle at 15% 50%, rgba(196, 154, 60, 0.06), transparent 25%),
                      radial-gradient(circle at 85% 30%, rgba(196, 154, 60, 0.04), transparent 25%);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 0; /* Mobile edge-to-edge */
    overscroll-behavior-y: none; /* 모바일(특히 iOS) 당겨서 새로고침(Pull-to-refresh) 및 바운스 효과 방지 */
}

.app-container {
    width: 100%;
    max-width: 420px; /* PC 화면에서 모바일 비율 너비로 제한 */
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh; /* 모바일 브라우저 하단 스크롤 잘림(100vh 버그) 완벽 방지 */
    background-color: var(--bg-dark); /* PC 배경과 구분하기 위한 배경색 */
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.4); /* 앱 영역 강조 그림자 */
    overflow: hidden;
    position: relative;
    padding-bottom: env(safe-area-inset-bottom); /* 모바일 Safe Area (하단 홈 바) 대응 */
}

/* PC/태블릿(≥480px): 수직 중앙 정렬 + 프레임 효과. 모바일(<480px)은 기존 그대로. */
@media (min-width: 480px) {
    body {
        align-items: center;
    }
    .app-container {
        min-height: 100dvh;
        border: 1px solid var(--brd);
    }
}

/* ==========================================
   Home View: Header
   ========================================== */
.home-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    flex-shrink: 0;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 8px;
}

.home-brand-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1;
}

.brand-blunder {
    color: var(--tx);
}

.brand-mate {
    color: var(--ac);
}

.app-logo {
    height: 26px;
    width: auto;
    object-fit: contain;
    filter: grayscale(1) sepia(0.6) saturate(1.8) hue-rotate(-10deg) brightness(1.05);
}

/* ==========================================
   Home View: States
   ========================================== */
.home-state {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    max-width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.home-scroll {
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

/* ==========================================
   Home View: State A — Hero
   ========================================== */
.home-hero {
    padding: 18px 16px 0;
}

.hero-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--tx);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 13px;
    color: var(--tx2);
    margin-top: 6px;
    margin-bottom: 20px;
}

/* ==========================================
   Home View: Username Input Row
   ========================================== */
.username-input-row {
    width: 100%;
    padding: 0 16px;
    box-sizing: border-box;
}

.username-input-wrap {
    display: flex;
    align-items: center;
    width: 100%;
    height: 48px;
    background: var(--bg-surface);
    border: 1px solid var(--brd2);
    border-radius: 8px;
    transition: border-color 0.2s ease;
}

.username-input-wrap:focus-within {
    border-color: var(--ac-br);
}

.home-text-input {
    flex: 1;
    height: 100%;
    background: transparent;
    border: none;
    outline: none;
    padding: 0 14px;
    font-size: 14px;
    color: var(--tx);
    -webkit-appearance: none;
    font-family: inherit;
    min-width: 0;
}

.home-text-input::placeholder {
    color: var(--tx3);
}

.username-clear-btn {
    display: none;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    background: rgba(128,128,128,0.15);
    border: none;
    border-radius: 50%;
    color: var(--tx3);
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    padding: 0;
    margin-right: 2px;
}

.username-clear-btn.visible {
    display: flex;
}

.home-submit-btn {
    width: 44px;
    height: 100%;
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--ac);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.home-submit-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ==========================================
   Home View: Secondary Links
   ========================================== */
.home-secondary-links {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 14px;
    margin-top: 14px;
    padding: 0 16px;
}

.home-link-btn {
    background: none;
    border: none;
    font-size: 12px;
    color: var(--tx3);
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
    padding: 8px 4px;
    font-family: inherit;
    transition: color 0.15s ease;
}

.home-link-btn:hover { color: var(--tx2); }

.home-link-sep {
    font-size: 12px;
    color: var(--tx3);
}

/* ==========================================
   Home View: Manual Input
   ========================================== */
.manual-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 12px 16px 0;
}

/* ==========================================
   Home View: Divider
   ========================================== */
.home-divider {
    height: 1px;
    background: var(--brd);
    margin: 20px 0;
    flex-shrink: 0;
}

.home-spacer {
    min-height: 32px;
    max-height: 80px;
    flex: 1;
}

.library-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--tx3);
    padding: 0 16px;
    margin-bottom: 4px;
}

/* ==========================================
   Home View: Library Rows
   ========================================== */
.library-rows {
    padding: 0 16px;
}

.library-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 52px;
    background: none;
    border: none;
    border-bottom: 1px solid var(--brd);
    cursor: pointer;
    font-family: inherit;
    padding: 0;
}

.library-row--first {
    border-top: 1px solid var(--brd);
}

.library-row-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--tx);
}

.library-row-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.library-row-count {
    font-size: 11px;
    color: var(--tx2);
}

.library-row-count.hidden {
    display: none;
}

.library-row-chevron {
    font-size: 16px;
    color: var(--tx3);
}

.home-ad-space {
    height: 60px;
    flex-shrink: 0;
}

/* ==========================================
   Input View
   ========================================== */
.input-pgn-area {
    background: var(--bg-surface);
    border-top: 1px solid var(--brd);
    padding: 12px 14px;
    flex-shrink: 0;
}

.input-pgn-textarea {
    width: 100%;
    min-height: 80px;
    background: var(--bg-elevated);
    border: 1px solid var(--brd2);
    border-radius: 8px;
    padding: 10px 12px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--tx);
    resize: none;
    box-sizing: border-box;
    outline: none;
}

.input-pgn-textarea::placeholder {
    color: var(--tx2);
    opacity: 0.6;
}

.input-analyze-btn {
    flex: 1;
    margin-left: 12px;
    height: 44px;
    border-radius: 8px;
    background: var(--ac);
    color: #100E0B;
    font-size: 14px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.15s ease;
}

.input-analyze-btn:hover { opacity: 0.85; }


/* ==========================================
   Home View: State B — Greeting
   ========================================== */
.home-greeting {
    padding: 20px 16px 14px;
}

.greeting-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--tx);
    letter-spacing: -0.01em;
}

.greeting-subtitle {
    font-size: 12px;
    color: var(--tx2);
    margin-top: 4px;
}

/* ==========================================
   Home View: State B — Vault Preview Card
   ========================================== */
.vault-preview-card {
    margin: 0 16px 14px;
    background: var(--bg-surface);
    border: 1px solid var(--brd2);
    border-radius: 10px;
    overflow: hidden;
}

.vault-preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-bottom: 1px solid var(--brd);
}

.vault-preview-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--ac);
}

.vault-preview-count {
    font-size: 10px;
    color: var(--tx3);
}

.vault-preview-row {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 44px;
    padding: 0 14px;
    border-bottom: 1px solid var(--brd);
    cursor: pointer;
    transition: background 0.15s ease;
}

.vault-preview-row:hover { background: rgba(237, 232, 223, 0.04); }

.vault-preview-badge {
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    flex-shrink: 0;
    letter-spacing: 0.02em;
}

.vault-preview-badge--blunder {
    background: rgba(200, 64, 64, 0.18);
    color: var(--blunder);
}

.vault-preview-badge--mistake {
    background: rgba(208, 96, 48, 0.18);
    color: var(--mistake);
}

.vault-preview-badge--missed,
.vault-preview-badge--tactic,
.vault-preview-badge--positional {
    background: rgba(232, 168, 56, 0.18);
    color: var(--inaccuracy);
}

.vault-preview-move {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--tx);
    flex-shrink: 0;
}

.vault-preview-meta {
    font-size: 11px;
    color: var(--tx2);
    flex: 1;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vault-preview-footer {
    font-size: 11px;
    color: var(--ac);
    padding: 10px 14px;
    text-align: right;
    cursor: pointer;
}

.vault-preview-footer:hover { opacity: 0.8; }

/* ==========================================
   Home View: State B — Bottom Row
   ========================================== */
.home-bottom-row {
    display: flex;
    gap: 8px;
    padding: 0 16px 20px;
}


/* ==========================================
   Home View: Games list (shared)
   ========================================== */

.search-input-container {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.search-input-container .text-input {
    width: 100%;
    padding-right: 3rem; /* 버튼이 들어갈 우측 여백 확보 */
}

.text-input {
    flex: 1;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    font-size: 16px; /* iOS 자동 확대 방지를 위해 시스템 기본값과 무관하게 명시적 16px 고정 */
    outline: none;
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    cursor: text;
    pointer-events: auto !important;
    user-select: text !important;
    -webkit-user-select: text !important;
    -webkit-appearance: none;
    position: relative;
    z-index: var(--z-sticky);
}

.text-input:focus {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(196, 154, 60, 0.2);
}

.search-submit-btn {
    position: absolute;
    right: 0.4rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    width: 32px;
    height: 32px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
    z-index: var(--z-sticky-top);
}
.search-submit-btn:hover { background: var(--primary-hover); transform: translateX(2px); }
.search-submit-btn:disabled {
    background: var(--tx-disabled);
    color: var(--tx-disabled);
    cursor: not-allowed;
    transform: none;
}

.games-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
    padding: 0 16px;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

.card-save-btn {
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--tx2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0;
    transition: color 0.15s ease;
}
.card-save-btn:hover {
    color: var(--ac);
}
.card-save-btn:active {
    opacity: 0.7;
}

.delete-btn {
    flex-shrink: 0;
    margin-left: 10px;
    padding: 0.4rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: color 0.15s ease, background 0.15s ease;
}
.delete-btn:hover { color: var(--blunder); background: rgba(239,68,68,0.08); }

.manual-input-toggle {
    text-align: center;
    margin-top: 0.5rem;
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: underline;
    transition: color 0.2s ease;
    position: relative;
    z-index: var(--z-sticky);
}

.text-btn:hover {
    color: var(--text-primary);
}

.hidden {
    display: none !important;
}

/* View Container Styling */
.view-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    flex: 1;
    min-height: 0;
    overflow: hidden;
    position: relative; /* FAB(플로팅 버튼)의 절대 위치 기준점 */
}

#homeView {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    background: var(--bg-base);
    max-width: 100%;
    box-sizing: border-box;
}

/* ==========================================
   Analysis View: Top Bar
   ========================================== */
.analysis-top-bar {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 0 0.75rem;
    height: 42px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 6px;
    transition: color 0.15s ease, background 0.15s ease;
    justify-self: start;
}
.back-btn:hover { color: var(--text-primary); background: rgba(255,255,255,0.06); }

.topbar-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    justify-self: end;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 34px;
    height: 30px;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
    flex-shrink: 0;
}
.topbar-icon-btn:hover { background: rgba(255, 255, 255, 0.1); color: var(--text-primary); }

.engine-status {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    padding: 0.2rem 0.55rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    justify-self: end;
}
.engine-status.engine-ready  { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.3); color: var(--best); }
.engine-status.engine-loading { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.3); color: var(--accent-warning); }

.top-bar-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.app-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--tx);
    letter-spacing: -0.02em;
}

.top-bar-spacer {
    width: 60px;
}

.top-bar-eval {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.practice-feedback {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}
.practice-feedback.positive { color: var(--best); }
.practice-feedback.negative { color: var(--blunder); }

.view-list {
    padding: 1rem;
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

/* ==========================================
   Analysis View: Eval Bar
   ========================================== */
.eval-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 14px;
    background: var(--bg-surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.eval-info {
    width: 80px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1px;
}

.eval-bar-wrap {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-board);
    position: relative;
    overflow: hidden;
}

.eval-bar-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 50%;
    background: var(--tx);
    border-radius: 0;
    transition: width 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes shimmer {
    0%   { opacity: 0.3; }
    50%  { opacity: 0.7; }
    100% { opacity: 0.3; }
}
.eval-bar-fill.loading {
    animation: shimmer 1.2s ease-in-out infinite;
    width: 50% !important;
}

.eval-score {
    font-family: 'IBM Plex Mono', 'SF Mono', 'Fira Code', monospace;
    font-size: 12px;
    font-weight: 700;
    color: var(--best);
}

.eval-label {
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--best);
}

textarea {
    width: 100%;
    height: 120px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: monospace;
    padding: 1rem;
    resize: vertical;
    transition: all 0.3s ease;
    font-size: 16px; /* iOS Safari 강제 줌(Zoom-in) 방지를 위한 최소 크기 보장 */
    -webkit-user-select: text !important;
    -webkit-appearance: none;
    position: relative;
    z-index: var(--z-sticky);
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(196, 154, 60, 0.2);
}

.primary-btn {
    align-self: flex-end;
    background: var(--primary-color);
    color: #100E0B;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 12px rgba(196, 154, 60, 0.25);
    position: relative;
    z-index: var(--z-sticky);
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.primary-btn:active {
    transform: translateY(1px);
}

.primary-btn:disabled {
    background: var(--tx-disabled);
    color: var(--tx-disabled);
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* ==========================================
   Analysis View: Board Area
   ========================================== */
.board-wrapper {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 0.4rem 0.5rem 0;
    flex-shrink: 0;
}

.status-bar {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-shrink: 0;
    padding: 0 0.75rem;
    min-height: 0;
}

.tag {
    padding: 0.3rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    border: 1px solid var(--border-color);
}

.tag.engine-ready { background: rgba(16, 185, 129, 0.1); border-color: rgba(16, 185, 129, 0.3); color: var(--best); }
.tag.engine-loading { background: rgba(245, 158, 11, 0.1); border-color: rgba(245, 158, 11, 0.3); color: var(--accent-warning); }
.tag.hidden { display: none; }

.board-container {
    width: 100%;
    max-width: calc(100dvh - 259px);
    aspect-ratio: 1 / 1;
    flex-shrink: 0;
}

/* ==========================================
   Analysis View: Navigation Controls
   ========================================== */
.unified-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 8px;
    background: var(--bg-panel);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.unified-controls-inner {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 480px;
    gap: 0;
}

.ctrl-group-left,
.ctrl-group-right {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    z-index: 1;
}

.ctrl-group-left {
    justify-content: flex-start;
}

.ctrl-group-right {
    justify-content: flex-end;
}

.ctrl-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-start-btn {
    flex: 1;
    height: 32px;
    margin: 0 8px;
    border: none;
    border-radius: 6px;
    background: var(--ac);
    color: #100E0B;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
}
.preview-start-btn:active { opacity: 0.85; }

/* Base style for action buttons in library/modals (kept for other views) */
.control-btn {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.75rem;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    flex: 1;
    max-width: 140px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.control-btn.icon-btn {
    gap: 0.75rem;
}

.control-btn.icon-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
}

.control-btn:active {
    transform: scale(0.95);
}

/* Analysis board control buttons (new style) */
.ctrl-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    box-shadow: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s ease;
    min-height: 44px;
    padding: 0;
    white-space: nowrap;
}

.ctrl-btn:hover { color: var(--text-primary); }
.ctrl-btn:active { transform: scale(0.95); }

.ctrl-nav {
    width: 36px;
    flex-shrink: 0;
    padding: 0;
}

.ctrl-save {
    width: 36px;
    flex-shrink: 0;
    padding: 0;
    color: var(--text-secondary);
}



/* ==========================================
   Engine Lines
   ========================================== */
.engine-line {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    cursor: pointer;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    transition: background 0.15s ease;
}

.engine-line:last-of-type {
    border-bottom: none;
}

.engine-line:hover {
    background: rgba(255, 255, 255, 0.05);
}

.engine-line--best {
    border-left: 2px solid rgba(196, 154, 60, 0.5);
}

.el-rank {
    font-size: 0.7rem;
    color: var(--text-secondary);
    min-width: 12px;
    opacity: 0.5;
    font-weight: 500;
}

.el-score {
    font-family: monospace;
    font-size: 0.88rem;
    font-weight: 700;
    min-width: 48px;
    color: var(--text-primary);
}

.el-score.positive { color: var(--best); }
.el-score.negative { color: var(--blunder); }

.el-moves {
    font-family: monospace;
    font-size: 0.84rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    letter-spacing: 0.01em;
}

.engine-hint {
    font-size: 0.7rem;
    color: var(--text-secondary);
    opacity: 0.35;
    text-align: center;
    padding: 0.9rem 0.75rem 0.5rem;
    user-select: none;
}

@media (hover: none) and (pointer: coarse) {
    .engine-hint {
        display: none;
    }
}


.engine-lines-container {
    padding: 0.25rem 0 0;
}

/* Analysis Preview Card */
.preview-card {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.preview-card-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--tx);
    overflow-wrap: break-word;
    word-break: break-word;
}
.preview-card-meta {
    font-size: 12px;
    color: var(--tx2);
    overflow-wrap: break-word;
    word-break: break-word;
}
.preview-card-opening-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--tx);
    overflow-wrap: break-word;
    word-break: break-word;
}
.preview-card-eco {
    font-size: 11px;
    color: var(--tx3);
    margin-top: 2px;
}

.moves-container {
    display: block;
    flex: 1;
    overflow-y: auto;
    background: var(--bg-panel);
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.move-cell {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.eval-badge {
    font-size: 0.8rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    min-width: 45px;
    text-align: center;
}

.eval-badge.positive { color: var(--text-primary); background: rgba(16, 185, 129, 0.2); }
.eval-badge.negative { color: var(--text-primary); background: rgba(239, 68, 68, 0.2); }

.empty-state {
    text-align: center;
    padding: 3rem !important;
    color: var(--text-secondary);
    font-style: italic;
}

/* AI 코치 해설 패널 (탭 내부에 배치, 전체 공간 채움) */
#geminiExplanation {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* ==========================================
   Unified Controls Tab Buttons
   ========================================== */
.ctrl-tab {
    flex: 0 0 auto;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    box-shadow: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    min-height: 44px;
    padding: 0 0.9rem;
    white-space: nowrap;
    transition: color 0.15s ease;
}

.ctrl-tab:hover { color: var(--text-primary); }

.ctrl-tab.active {
    background: transparent;
    color: var(--primary-color);
    border: none;
    font-weight: 600;
}

.bar-separator {
    width: 1px;
    height: 16px;
    background: var(--brd2);
    flex-shrink: 0;
}

.tab-toggle-btn {
    width: auto;
    flex-shrink: 0;
    background: transparent;
    border: none;
    color: var(--ac);
    font-weight: 700;
    font-size: 12px;
    cursor: pointer;
    padding: 0;
    text-align: center;
    white-space: nowrap;
    transition: opacity 0.15s ease;
}
.tab-toggle-btn:hover { opacity: 0.75; }

.win-chance-display {
    width: 44px;
    flex-shrink: 0;
    font-family: 'IBM Plex Mono', 'SF Mono', 'Fira Code', monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--tx2);
    line-height: 1;
    text-align: center;
    cursor: pointer;
    transition: opacity 0.15s ease;
}

.move-class-label {
    width: 88px;
    flex-shrink: 0;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1;
    text-align: center;
}

.panel-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.tab-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

.tab-panel.active {
    display: flex;
}

.ai-panel-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

.ai-analyze-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: calc(100% - 1.5rem);
    height: 44px;
    margin: 0.75rem;
    background: rgba(196, 154, 60, 0.12);
    border: 1px solid rgba(196, 154, 60, 0.28);
    border-radius: 8px;
    color: var(--ac);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
    flex-shrink: 0;
}

.ai-analyze-btn:hover {
    background: rgba(196, 154, 60, 0.2);
    border-color: rgba(196, 154, 60, 0.5);
}

.ai-analyze-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.ai-panel-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 2rem 1rem;
    text-align: center;
    color: var(--text-secondary);
}

.ai-placeholder-icon {
    width: 2.25rem;
    height: 2.25rem;
    color: var(--primary-color);
    opacity: 0.5;
    margin-bottom: 0.75rem;
}

.ai-placeholder-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.ai-placeholder-hint {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Gemini panel dynamic content styles */
.gemini-text-panel {
    padding: 1.25rem 1rem;
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 0.95rem;
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
    min-width: 0;
    overscroll-behavior-y: contain;
    -webkit-overflow-scrolling: touch;
    overflow-wrap: break-word;
    word-break: break-word;
}

/* AI 응답의 긴 URL/코드 토큰이 패널 밖으로 튀어나오지 않도록 방지 */
.gemini-text-panel pre {
    max-width: 100%;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}
.gemini-text-panel code,
.gemini-text-panel a {
    overflow-wrap: break-word;
    word-break: break-word;
}

.gemini-text-panel h3 {
    font-size: 13px;
    font-weight: 700;
    color: var(--tx);
    margin: 16px 0 6px;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
}
.gemini-text-panel h3:first-child {
    margin-top: 0;
}
.gemini-text-panel h3::before {
    content: '';
    display: inline-block;
    width: 3px;
    height: 12px;
    background: var(--ac);
    border-radius: 2px;
    margin-right: 8px;
    flex-shrink: 0;
    position: relative;
    top: 0;
}
.gemini-text-panel p {
    font-size: 13px;
    line-height: 1.75;
    color: var(--tx2);
    margin-bottom: 12px;
}
.gemini-text-panel strong {
    color: var(--tx);
    font-weight: 600;
}
.gemini-text-panel ul,
.gemini-text-panel ol {
    padding-left: 1.25rem;
    margin-bottom: 12px;
}
.gemini-text-panel li {
    font-size: 13px;
    line-height: 1.75;
    color: var(--tx2);
    margin-bottom: 4px;
}

.ai-notice {
    color: var(--accent-warning);
    padding: 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.ai-loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 3rem 0;
    font-size: 0.9rem;
    line-height: 1.8;
}

.ai-loading-sub {
    font-size: 0.82rem;
    opacity: 0.65;
}

.ai-error {
    color: var(--blunder);
    padding: 1rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.ai-error-detail {
    font-size: 0.82rem;
    opacity: 0.8;
}

.ai-good-move-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 2.5rem 1.5rem;
    text-align: center;
    line-height: 1.6;
}

.ai-good-move-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--best);
    margin-bottom: 1rem;
}

.ai-good-move-title {
    font-size: 1.05rem;
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.75rem;
}

.ai-good-move-desc {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.7;
}

/* AI Coach 버튼 (modal/other contexts) */
.ai-btn {
    background: rgba(196, 154, 60, 0.12);
    color: var(--ac);
    border-color: rgba(196, 154, 60, 0.28);
}
.ai-btn:hover {
    background: rgba(196, 154, 60, 0.25);
    border-color: var(--ac);
}

/* Vault Detail View 하단 정보 패널 */
.vault-info-panel {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem 1rem 1rem;
    background: var(--bg-panel);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.85rem;
    line-height: 1.4;
}
.vault-info-category {
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    font-size: 0.75rem;
    color: var(--accent-warning, #f59e0b);
}
.vault-info-row {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
}
.vault-info-label {
    color: var(--text-secondary);
    font-size: 0.78rem;
}
.vault-info-notes {
    margin-top: 0.25rem;
    padding: 0.5rem 0.6rem;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 6px;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
}
.vault-info-notes:empty { display: none; }

/* 메인 라인 복귀 버튼 래퍼: 버튼이 hidden이면 래퍼도 공간 미차지 */
.return-main-btn {
    background: transparent;
    border: none;
    color: var(--accent-warning);
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    padding: 0;
    white-space: nowrap;
    transition: opacity 0.15s ease;
}
.return-main-btn:hover { opacity: 0.75; }
.return-main-btn.hidden { display: none; }

/* ==========================================
   Pill Buttons (shared: category picker + filter bar)
   ========================================== */
.pill-picker,
.pill-filter-bar {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.pill-picker::-webkit-scrollbar,
.pill-filter-bar::-webkit-scrollbar { display: none; }

.pill-filter-bar {
    padding: 8px 16px;
    flex-shrink: 0;
}

.pill-btn {
    flex-shrink: 0;
    height: 32px;
    padding: 0 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.15s ease;
    background: transparent;
    border: 1px solid var(--brd2);
    color: var(--tx2);
}

.pill-btn.selected {
    background: var(--ac-lo, rgba(99,102,241,0.1));
    border-color: var(--ac-br, var(--ac));
    color: var(--ac);
    font-weight: 600;
}

/* ==========================================
   Saved Games: Card Style
   ========================================== */
.saved-game-card {
    background: var(--bg-surface);
    border: 1px solid var(--brd2);
    border-radius: 8px;
    padding: 14px 16px;
    cursor: pointer;
    transition: border-color 0.15s ease;
}

.saved-game-card:active {
    border-color: var(--ac-br, var(--ac));
}

.saved-game-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.saved-game-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--tx);
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.saved-game-card-pill {
    flex-shrink: 0;
    font-size: 10px;
    font-weight: 500;
    padding: 2px 8px;
    border-radius: 20px;
    background: var(--ac-lo, rgba(99,102,241,0.1));
    border: 1px solid var(--ac-br, var(--ac));
    color: var(--ac);
    white-space: nowrap;
}

.saved-game-card-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 8px;
}

.saved-game-card-date {
    font-size: 11px;
    color: var(--tx3);
}

.saved-game-card-actions {
    display: flex;
    gap: 4px;
}

.saved-game-card .edit-btn,
.saved-game-card .delete-btn {
    color: var(--tx3);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    transition: color 0.15s ease;
}

.saved-game-card .edit-btn:hover {
    color: var(--ac);
}

.saved-game-card .delete-btn:hover {
    color: var(--blunder);
}

.saved-games-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px 16px 16px;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark); 
}
::-webkit-scrollbar-thumb {
    background: var(--tx-disabled); 
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: #4b5563; 
}

/* ==========================================
   Simulation Panel
   ========================================== */
.sim-panel {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.sim-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sim-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
    font-weight: 600;
}

.sim-counter {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-family: monospace;
}

.sim-moves {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    align-items: center;
}

.sim-move {
    font-family: monospace;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 5px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: opacity 0.15s ease, border-color 0.15s ease, background 0.15s ease;
    user-select: none;
}

.sim-move--done {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

.sim-move--active {
    color: var(--tx);
    background: rgba(196, 154, 60, 0.2);
    border-color: var(--ac);
    box-shadow: 0 0 0 2px rgba(196, 154, 60, 0.15);
}

.sim-move--upcoming {
    color: var(--text-secondary);
    background: transparent;
    border-color: rgba(255, 255, 255, 0.06);
    opacity: 0.5;
}

.sim-move:hover {
    opacity: 1;
    border-color: rgba(255, 255, 255, 0.25);
}

/* Row highlighting for active move */
.active-move {
    background: rgba(196, 154, 60, 0.12);
    border-left: 3px solid var(--ac);
}
.active-move .move-cell {
    font-weight: bold;
    color: var(--ac);
}
.active-move-row {
    background: rgba(255, 255, 255, 0.02);
}

/* ==========================================
   Move Classification Piece Badge
   ========================================== */
@keyframes badgePop {
    0%   { opacity: 0; transform: scale(0.3); }
    70%  { transform: scale(1.2); }
    100% { opacity: 1; transform: scale(1); }
}

.piece-badge-square {
    position: absolute;
    width: 12.5%;
    height: 12.5%;
    pointer-events: none;
    overflow: visible;
    z-index: var(--z-badge);
}

.piece-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    animation: badgePop 0.2s ease-out forwards;
    white-space: nowrap;
    line-height: 1;
}

/* --- 체스그라운드 좌표(Coordinates) 완벽 정렬 보정 --- */
.cg-wrap coords {
    position: absolute;
    display: flex;
    pointer-events: none;
    z-index: var(--z-board-coords);
    font-family: 'Inter', sans-serif;
    font-size: 11px;
    font-weight: 500;
    color: #000000;
    text-shadow: 0 0 3px rgba(255, 255, 255, 0.7); /* 어두운 칸에서도 검은 글씨가 잘 보이도록 은은한 흰색 테두리 추가 */
}
.cg-wrap coords.ranks {
    flex-flow: column-reverse;
    top: 0;
    left: 0; /* 숫자를 우측이 아닌 좌측(a파일) 가장자리에 배치 (표준 스타일) */
    height: 100%;
    width: 16px;
}
.cg-wrap.orientation-black coords.ranks { flex-flow: column; }
.cg-wrap coords.ranks coord {
    flex: 1 1 12.5%; /* 8등분 강제 할당 (깨짐 방지 핵심) */
    display: flex;
    align-items: flex-start;
    justify-content: flex-start; /* 칸의 좌측 상단 구석으로 밀착 */
    padding-top: 2px;
    padding-left: 3px;
}
.cg-wrap coords.files {
    flex-flow: row;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 16px;
}
.cg-wrap.orientation-black coords.files { flex-flow: row-reverse; }
.cg-wrap coords.files coord {
    flex: 1 1 12.5%; /* 8등분 강제 할당 (깨짐 방지 핵심) */
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding-bottom: 1px; /* 칸의 우측 하단 구석으로 더 밀착 */
    padding-right: 2px;
}

/* ==========================================
   Toggle Switch
   ========================================== */
.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    flex-shrink: 0;
}
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: rgba(255,255,255,0.12);
    border: 1px solid var(--border-color);
    transition: background 0.2s ease;
}
.slider:before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    left: 2px;
    top: 2px;
    background: var(--text-secondary);
    transition: transform 0.2s ease, background 0.2s ease;
}
.slider.round { border-radius: 24px; }
.slider.round:before { border-radius: 50%; }
input:checked + .slider { background: rgba(196,154,60,0.35); border-color: var(--ac); }
input:checked + .slider:before { transform: translateX(20px); background: var(--ac); }

/* ==========================================
   Settings Modal Styles
   ========================================== */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--tx2);
    font-size: 1.2rem;
    cursor: pointer;
    line-height: 1;
    padding: 0 0.25rem;
    transition: color 0.15s ease;
}
.modal-close-btn:hover { color: var(--tx); }

.settings-row {
    border-bottom: 1px solid var(--brd);
    margin-top: 1rem;
}

.settings-row-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 52px;
}

.settings-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--tx);
}

.settings-hint {
    font-size: 12px;
    color: var(--tx2);
    margin-top: 2px;
    display: block;
    line-height: 1.4;
    padding-bottom: 8px;
}

.settings-row--action {
    border-bottom: none;
    margin-top: 1.5rem;
}

.settings-logout-btn {
    width: 100%;
    background: transparent;
    border: 1px solid var(--brd);
    color: var(--blunder);
    padding: 12px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s ease;
}
.settings-logout-btn:hover {
    background: rgba(200, 64, 64, 0.08);
}

.lang-toggle {
    display: flex;
    gap: 0.25rem;
}

.lang-btn {
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
}

.lang-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ==========================================
   Feedback Modal Buttons
   ========================================== */
.feedback-cancel-btn {
    background: none;
    border: none;
    color: var(--tx2);
    font-size: 14px;
    cursor: pointer;
    font-family: inherit;
    padding: 0 0.5rem;
    transition: color 0.15s ease;
}
.feedback-cancel-btn:hover { color: var(--tx); }

.feedback-send-btn {
    flex: 1;
    height: 44px;
    border-radius: 8px;
    background: var(--ac);
    color: #100E0B;
    font-size: 14px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    font-family: inherit;
    transition: opacity 0.15s ease;
}
.feedback-send-btn:hover { opacity: 0.85; }
.feedback-send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ==========================================
   Utility & Modal Helpers
   ========================================== */
.modal-title-center { text-align: center; }

.modal-content--narrow { max-width: 320px; }

.modal-actions--col {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Full-width buttons (library + modal) */
.btn-full {
    width: 100%;
    max-width: none;
    justify-content: center;
}

.btn-primary-outline {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Short textarea (80px) */
.textarea-short { height: 80px !important; }

/* Native select appearance */
.select-auto { appearance: auto; }

/* Best move hint in Save modal */
.save-best-move-text {
    text-align: center;
    color: var(--best);
    font-size: 0.95rem;
    font-weight: 600;
    margin-top: -0.5rem;
    margin-bottom: 0.5rem;
    min-height: 1.2em;
}

/* Text divider (|) in manual input row */
.text-divider {
    color: var(--text-secondary);
    margin: 0 0.5rem;
    user-select: none;
}

/* Inline status/loading messages inside containers */
.container-message {
    text-align: center;
    padding: 1rem;
    color: var(--text-secondary);
}

.container-message--error {
    color: var(--blunder);
}

/* Engine error state */
.engine-status.engine-error {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--blunder);
}

.modal-content--wide {
    max-width: 500px;
    width: 95%;
}

.board-container--input {
    margin: 0 auto;
    width: 100%;
    max-width: 40vh;
}

.pgn-readonly {
    height: 70px !important;
    background: rgba(0,0,0,0.3) !important;
    color: var(--text-secondary) !important;
    font-size: 0.9rem !important;
    cursor: default !important;
}

.modal-actions--spread {
    justify-content: space-between;
    margin-top: 0.5rem;
}

.modal-actions-right {
    display: flex;
    gap: 1rem;
}

.btn-undo {
    flex: 0 0 auto;
    padding: 0.5rem 1rem;
    max-width: none;
    width: auto;
}

/* Modal Styles */
.modal-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: var(--z-modal);
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--brd2);
    border-radius: 12px;
    padding: 20px;
    width: 90%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    animation: fadeInUp 0.3s ease-out;
}

.modal-content h2 { margin: 0; font-size: 17px; font-weight: 700; color: var(--tx); }
.save-move-text { 
    font-family: monospace; 
    font-size: 1.2rem; 
    color: var(--primary-color); 
    font-weight: bold; 
    text-align: center; 
    background: rgba(0,0,0,0.2); 
    padding: 0.8rem; 
    border-radius: 8px;
}
.modal-actions { display: flex; justify-content: flex-end; gap: 1rem; margin-top: 0.5rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group label { font-size: 0.9rem; color: var(--text-secondary); }
.form-group select option { background: var(--bg-dark); color: #fff; }

/* ==========================================
   Chess Board Color Override (보드 내부만)
   ========================================== */
.board-container cg-board {
    background-color: #E8DCBF !important;
    background-image: conic-gradient(
        #8C6840 0.25turn,
        #E8DCBF 0.25turn 0.5turn,
        #8C6840 0.5turn 0.75turn,
        #E8DCBF 0.75turn
    ) !important;
    background-size: 25% 25% !important;
    background-position: 0 0 !important;
}

@media (max-width: 768px) {
    .primary-btn {
        align-self: stretch;
        width: 100%;
    }

    /* 모바일 환경에서는 스크롤바를 숨겨 화면 공간을 최대한 확보하고 네이티브 터치 느낌을 강조 */
    ::-webkit-scrollbar {
        display: none;
    }
    * {
        scrollbar-width: none;
    }
}

/* ==========================================
   Moves Overlay
   ========================================== */
.moves-overlay {
    position: absolute;
    inset: 0;
    z-index: var(--z-overlay);
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s cubic-bezier(0.32, 0.72, 0, 1);
}

.moves-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.moves-overlay-sheet {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 80dvh;
    background: var(--bg-surface);
    border-radius: 12px 12px 0 0;
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform 0.28s cubic-bezier(0.32, 0.72, 0, 1);
    overflow: hidden;
}

.moves-overlay.open .moves-overlay-sheet {
    transform: translateY(0);
}

.moves-overlay-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    padding: 0 1rem;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.moves-overlay-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.moves-overlay-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
    transition: color 0.15s ease;
}
.moves-overlay-close:hover { color: var(--text-primary); }

.moves-overlay-download {
    background: none;
    border: none;
    color: var(--ac);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    margin-left: auto;
    font-family: inherit;
}
.moves-overlay-download:hover { opacity: 0.75; }

.moves-overlay .moves-container {
    overflow-y: auto;
    flex: 1;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

.moves-overlay tr {
    height: 44px;
}

.moves-overlay td,
.moves-overlay th {
    padding: 0 1rem;
}

.moves-overlay .active-move-row td {
    background: rgba(196, 154, 60, 0.12);
    color: var(--ac);
}

/* ── Onboarding ────────────────────────────────────────────────── */
#onboardingView {
    display: flex;
    flex-direction: column;
    background: var(--bg-base);
}

.onboarding-top {
    padding-top: 60px;
    text-align: center;
}

.onboarding-logo {
    height: 48px;
    width: auto;
}

.onboarding-brand {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--tx);
    margin: 12px 0 0;
}

.onboarding-tagline {
    font-size: 15px;
    color: var(--tx2);
    margin-top: 8px;
}

.onboarding-middle {
    margin-top: 48px;
    padding: 0 24px;
}

.onboarding-label {
    display: block;
    font-size: 13px;
    color: var(--tx3);
    margin-bottom: 8px;
}

.onboarding-skip-wrap {
    margin-top: 16px;
    text-align: center;
}

.onboarding-skip {
    font-size: 13px;
    color: var(--tx3);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 3px;
    padding: 0;
}

/* ── Home: Logged-in state ─────────────────────────────────────── */
.home-hero--user .hero-title {
    font-size: 13px;
    font-weight: 400;
    color: var(--tx3);
    letter-spacing: 0;
    line-height: 1.4;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 0;
}

.hero-username {
    color: var(--tx);
    font-weight: 600;
}

.hero-sep {
    color: var(--tx3);
}

.hero-rating-label {
    color: var(--tx3);
}

.hero-rating-value {
    color: var(--tx);
    font-weight: 600;
}

.username-input-wrap--small {
    height: 40px;
}

.username-input-wrap--small .home-text-input {
    font-size: 13px;
}

.username-input-wrap--small .home-submit-btn {
    width: 36px;
}

/* ── Home: Recent Games ────────────────────────────────────────── */
#homeRecentSection {
    padding: 0 16px;
}

.home-section-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--tx3);
    margin-bottom: 6px;
    text-transform: uppercase;
}

.home-recent-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
}

.home-recent-back {
    background: none;
    border: none;
    font-family: inherit;
    font-size: 11px;
    color: var(--tx3);
    text-decoration: underline;
    text-underline-offset: 3px;
    cursor: pointer;
    padding: 4px 0;
    margin-bottom: 8px;
}

.home-recent-back:hover { color: var(--tx2); }
.home-recent-back.hidden { display: none; }

.home-recent-list {
    display: flex;
    flex-direction: column;
    gap: var(--game-card-gap);
}

/* 최근 게임 스크롤 박스: 4개 완전 + 5번째 ~1/3 노출로 스크롤 힌트 제공 */
.recent-games-scroll {
    max-height: calc(var(--game-card-height) * 4.33 + var(--game-card-gap) * 4);
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--brd2) transparent;
    mask-image: linear-gradient(to bottom, black 0%, black 85%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 0%, black 85%, transparent 100%);
}

.recent-games-scroll::-webkit-scrollbar {
    width: 4px;
}
.recent-games-scroll::-webkit-scrollbar-track {
    background: transparent;
}
.recent-games-scroll::-webkit-scrollbar-thumb {
    background: var(--brd2);
    border-radius: 2px;
}

/* 홈 카드와 Vault 카드가 동일한 컨테이너/좌측 바 시각을 공유 (app-card 공통 스타일). */
.home-recent-card,
.vault-card {
    padding: 0 14px 0 18px;
    background: var(--bg-surface);
    border: 1px solid var(--brd);
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    position: relative;
    overflow: hidden;
}

.home-recent-card::before,
.vault-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 4px;
}

.home-recent-card:active,
.vault-card:active {
    opacity: 0.7;
}

.home-recent-card { height: var(--game-card-height); }
.home-recent-card.white::before { background: var(--tx); }
.home-recent-card.black::before { background: var(--tx2); }

.home-recent-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.home-recent-opponent {
    font-size: 13px;
    font-weight: 600;
    color: var(--tx);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-recent-rating {
    color: var(--tx2);
    font-weight: 400;
    font-size: 12px;
}

.home-recent-meta {
    font-size: 11px;
    color: var(--tx2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-recent-result {
    font-size: 11px;
    font-weight: 600;
    flex-shrink: 0;
}

.home-recent-result--win  { color: var(--best); }
.home-recent-result--loss { color: var(--blunder); }
.home-recent-result--draw { color: var(--tx3); }

/* Skeleton */
.home-recent-skeleton {
    display: flex;
    flex-direction: column;
    gap: var(--game-card-gap);
}

.home-recent-skeleton-card {
    height: var(--game-card-height);
    border-radius: 8px;
    background: var(--bg-surface);
    opacity: 0.5;
}

/* ── Vault Card (홈 카드와 시각 통일, 2~3줄) ─────────────────────── */
.vault-card {
    min-height: var(--game-card-height);
    padding-top: 10px;
    padding-bottom: 10px;
}

.vault-card::before { background: var(--vault-card-accent, var(--tx2)); }

.vault-card--legacy { opacity: 0.55; }

.vault-card-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.vault-card-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    min-width: 0;
}

.vault-card-moves {
    font-family: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--tx);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
    flex: 1;
}

.vault-card-arrow {
    color: var(--tx3);
    font-weight: 400;
    margin: 0 2px;
}

.vault-card-cat {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

.vault-card-meta {
    font-size: 11px;
    color: var(--tx2);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.vault-card-notes {
    font-size: 11px;
    color: var(--tx2);
    font-style: italic;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ── Vault Detail: 삭제 버튼 ────────────────────────────────────── */
.vault-detail-delete-btn {
    margin-top: auto;
    align-self: stretch;
    padding: 10px 12px;
    background: transparent;
    border: 1px solid var(--brd);
    border-radius: 8px;
    color: var(--blunder);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}
.vault-detail-delete-btn:hover {
    background: rgba(200, 64, 64, 0.08);
    border-color: var(--blunder);
}
.vault-detail-delete-btn:active { opacity: 0.7; }

/* ==========================================
   Analysis Summary View (0수 = 시작 포지션)
   체스보드 자리를 승률 그래프로, 하단 패널을 리포트로 교체
   ========================================== */
#summaryGraph,
#summaryReport {
    display: none;
}

#analysisView.view-summary #boardContainer { display: none; }
#analysisView.view-summary .panel-content { display: none; }
#analysisView.view-summary #summaryGraph { display: block; }
#analysisView.view-summary #summaryReport { display: flex; }

/* 0수 상태에서 "현재 수" 관련 UI 숨김 (‹, ›, 수 분류, 승률, 저장, Engine⇄AI 토글).
   visibility를 쓰는 이유: 레이아웃(바 높이/간격)이 튀지 않게 하기 위해. */
#analysisView.view-summary #prevMoveBtn,
#analysisView.view-summary #nextMoveBtn,
#analysisView.view-summary #saveMoveBtn,
#analysisView.view-summary #tabToggleBtn,
#analysisView.view-summary #moveClassLabel,
#analysisView.view-summary #winChanceDisplay,
#analysisView.view-summary .ctrl-center .bar-separator {
    visibility: hidden;
    pointer-events: none;
}

/* 그래프: 16:8(2:1) 납작 비율로 컴팩트화. 보드 footprint에 얽매이지 않음. */
.summary-graph {
    width: 100%;
    aspect-ratio: 16 / 8;
    flex-shrink: 0;
    padding: 4px 4px 2px;
    box-sizing: border-box;
}
.summary-graph-svg {
    width: 100%;
    height: 100%;
    display: block;
    background: var(--bg-surface);
    border: 1px solid var(--brd);
    border-radius: 8px;
}
.summary-graph-tick {
    font-family: 'IBM Plex Mono', 'SF Mono', monospace;
    font-size: 9px;
    fill: var(--tx3);
}
.summary-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: var(--bg-surface);
    border: 1px solid var(--brd);
    border-radius: 8px;
    color: var(--tx3);
    font-size: 12px;
}

/* 하단 리포트 영역. 정확도+수분류 통합 카드 1개 + 복기 시작 버튼 1개. */
.summary-report {
    flex-direction: column;
    gap: 10px;
    padding: 8px 14px 14px;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
}

/* 통합 카드: 정확도 + 수 분류가 하나의 표로. 백/흑 축 공유. */
.review-stats-card {
    background: var(--bg-surface);
    border: 1px solid var(--brd);
    border-radius: 8px;
    padding: 8px 12px;
    max-width: 100%;
    box-sizing: border-box;
}
.review-stats-table {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
}
.review-stats-table th,
.review-stats-table td {
    padding: 5px 0;
    font-size: 12px;
    color: var(--tx);
    vertical-align: middle;
}
.review-stats-table thead th {
    font-weight: 700;
    font-size: 10px;
    color: var(--tx3);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    text-align: right;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--brd);
}
.review-stats-table thead th:first-child {
    text-align: left;
}

/* 정확도 행: 숫자를 약간 키워서 강조. */
.review-stats-accuracy td {
    padding: 8px 0;
    font-weight: 700;
}
.review-stats-num-strong {
    font-family: 'IBM Plex Mono', 'SF Mono', monospace;
    font-size: 15px;
    font-weight: 700;
    color: var(--tx);
    text-align: right;
    width: 68px;
}

/* 정확도와 수 분류 첫 행 사이 구분선. */
.review-stats-class-first td {
    border-top: 1px solid var(--brd);
    padding-top: 8px;
}

.review-stats-label {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
    white-space: nowrap;
}
.review-stats-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}
.review-stats-num {
    font-family: 'IBM Plex Mono', 'SF Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--tx);
    text-align: right;
    width: 68px;
}

/* "첫 수부터 복기 →" 보조 버튼 — 분석 시작(강조)보다 덜 튀게 테두리+투명 배경. */
.review-start-btn {
    align-self: stretch;
    height: 36px;
    padding: 0 14px;
    border: 1px solid var(--ac);
    border-radius: 6px;
    background: transparent;
    color: var(--ac);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.02em;
    cursor: pointer;
    font-family: inherit;
}
.review-start-btn:active { opacity: 0.75; }