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

/* ── Design Tokens ─────────────────────────────────────────────────────────── */
:root {
    --bg:        #0F0F0F;
    --surface:   #1A1A1A;
    --card:      #222222;
    --raised:    #2A2A2A;
    --divider:   #333333;
    --text:      #EEEEEE;
    --text2:     #9E9E9E;
    --text3:     #555555;
    --accent:    #2196F3;
    --r-sm: 8px; --r-md: 10px; --r-lg: 12px; --r-xl: 16px;
    /* layout */
    --rail-w:    5rem;
    --content-max: 1200px;
}

html, body {
    height: 100%;
}

html {
    font-size: 16px;
}
@media (min-width: 840px)  { html { font-size: 17px; } }
@media (min-width: 1200px) { html { font-size: 19px; } }
@media (min-width: 1600px) { html { font-size: 21px; } }
@media (min-width: 2000px) { html { font-size: 24px; } }

body {
    font-family: 'Roboto', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    overflow-x: hidden;
}

/* ══════════════════════════════════════════════════════════════════════════════
   ADAPTIVE SHELL
   Phone  (<840px): normal stacked screens
   Tablet (≥840px): persistent left rail + content pane
══════════════════════════════════════════════════════════════════════════════ */
#app-shell {
    display: flex;
    height: 100vh;
}

/* ── Navigation Rail (tablet/desktop only) ─────────────────────────────────── */
#nav-rail {
    display: none;
    width: var(--rail-w);
    background: var(--surface);
    border-right: 1px solid var(--divider);
    flex-direction: column;
    align-items: center;
    padding: 16px 0;
    gap: 4px;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
}
.rail-logo {
    font-size: .65rem; font-weight: 900; letter-spacing: 1px;
    color: var(--text); text-align: center; padding: 8px 4px 16px;
    line-height: 1.3;
}
.rail-item {
    display: flex; flex-direction: column; align-items: center;
    width: 4.5rem; padding: 0.625rem 0.25rem; border-radius: var(--r-lg);
    cursor: pointer; border: none; background: transparent;
    color: var(--text2); font-size: .7rem; font-family: inherit;
    gap: 0.25rem; transition: background .15s, color .15s;
}
.rail-item:hover { background: rgba(255,255,255,.06); color: var(--text); }
.rail-item.active { background: rgba(255,255,255,.1); color: var(--text); }
.rail-icon { width:22px; height:22px; fill:currentColor; flex-shrink:0; }
.rail-spacer { flex: 1; }

/* ── Content Area ──────────────────────────────────────────────────────────── */
#content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
    overflow: hidden;
}

/* ── Screens ───────────────────────────────────────────────────────────────── */
.screen { display:none; flex-direction:column; flex:1; height:100%; overflow:hidden; }
.screen.active { display:flex; }
/* home/game/category/settings scroll naturally */
#screen-home.active,
#screen-game.active,
#screen-category.active,
#screen-detail.active,
#screen-sldetail.active,
#screen-settings.active { overflow-y:auto; height:auto; min-height:100%; }

/* ── Top Bar ───────────────────────────────────────────────────────────────── */
.top-bar {
    background: var(--surface);
    display: flex; align-items: center;
    padding: 0 8px; height: 56px; gap: 4px;
    position: sticky; top: 0; z-index: 50; flex-shrink: 0;
    border-bottom: 1px solid var(--divider);
}
.top-bar-title {
    flex: 1; font-size: 1.125rem; font-weight: 500; color: var(--text);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; padding: 0 4px;
}
.top-bar-title-home { font-size: 1rem; font-weight: 900; letter-spacing: 2px; color: var(--text); }
.top-bar-title-home span { color: var(--text2); font-weight: 400; }
.app-logo { width: 32px; height: 32px; border-radius: 8px; flex-shrink: 0; margin-right: 4px; }
.top-bar-actions { display:flex; gap:4px; margin-left:auto; }
.icon-btn {
    width:40px; height:40px; border-radius:50%; border:none;
    background:transparent; color:var(--text); font-size:1.25rem;
    cursor:pointer; display:flex; align-items:center; justify-content:center;
    transition:background .15s; flex-shrink:0;
}
.icon-btn:hover { background:rgba(255,255,255,.08); }
.back-btn { color: var(--text2); }

/* ── Home ──────────────────────────────────────────────────────────────────── */
.home-content { flex:1; padding: 16px; display:flex; flex-direction:column; overflow-y:auto; }
.series-list { display:flex; flex-direction:column; gap:12px; flex:1; }
.series-card {
    position:relative; display:flex; align-items:center;
    border-radius:var(--r-xl); padding:20px 20px;
    overflow:hidden; cursor:pointer; flex:1; min-height:88px;
    transition:opacity .15s;
}
.series-card:hover { opacity: 0.9; }

/* ── Elemental Labels ────────────────────────────────────────────────────── */
.weakness-row {
    display: flex;
    gap: 4px;
    margin-top: 4px;
    flex-wrap: wrap;
}
.weak-label {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 1px 4px;
    border-radius: 4px;
    text-transform: uppercase;
    background: #E5737333;
    color: #E57373;
    border: 1px solid #E5737344;
}
.resist-label {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 1px 4px;
    border-radius: 4px;
    text-transform: uppercase;
    background: #81C78433;
    color: #81C784;
    border: 1px solid #81C78444;
}

/* ── Social Link Awakenings ───────────────────────────────────────────────── */
.awakening-card {
    background: var(--bg2);
    border-radius: 12px;
    padding: 12px;
    margin-top: 12px;
    border-left: 4px solid var(--accent);
}
.awakening-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    opacity: 0.7;
    margin-bottom: 4px;
}
.awakening-name {
    font-size: 1.125rem;
    font-weight: 700;
}
.awakening-req {
    font-size: 0.875rem;
    opacity: 0.7;
    margin-top: 2px;
}

/* ── Boss Enhancements ───────────────────────────────────────────────────── */
.boss-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 16px;
}
.boss-image {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin-bottom: 16px;
}
.boss-name {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}
.boss-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    width: 100%;
    margin-top: 16px;
}
.boss-stat-box {
    background: var(--bg2);
    padding: 12px;
    border-radius: 12px;
}
.boss-stat-val {
    font-size: 1.25rem;
    font-weight: 700;
}
.boss-stat-label {
    font-size: 0.75rem;
    opacity: 0.7;
    text-transform: uppercase;
    font-weight: 700;
}
.series-card-bg-num {
    position:absolute; right:-8px; top:-8px;
    font-size:clamp(5rem, 15vw, 12rem); font-weight:900; opacity:.12; color:#fff;
    line-height:1; pointer-events:none; user-select:none;
}
.series-card-text { flex:1; position:relative; z-index:1; }
.series-card-title { font-size:1.125rem; font-weight:700; color:#fff; }
.series-card-sub   { font-size:.8rem; color:rgba(255,255,255,.7); margin-top:2px; }
.series-card-arrow { font-size:1.5rem; color:rgba(255,255,255,.5); position:relative; z-index:1; }
.home-footer { text-align:center; color:var(--text3); font-size:.75rem; padding:16px 0 8px; flex-shrink:0; }

/* ── Game Selection ────────────────────────────────────────────────────────── */
.game-list { display:flex; flex-direction:column; gap:8px; padding:16px; }
.game-btn {
    display:flex; align-items:center; width:100%;
    padding:18px 20px; background:var(--card); border:none;
    border-radius:var(--r-lg); color:var(--text); font-size:1rem;
    cursor:pointer; text-align:left; font-family:inherit;
    transition:background .15s;
}
.game-btn:hover { background:var(--raised); }
.game-btn-dot { width:10px; height:10px; border-radius:50%; margin-right:14px; flex-shrink:0; }
.game-btn-arrow { margin-left:auto; color:var(--text3); font-size:1.25rem; }

/* ── Category Screen ───────────────────────────────────────────────────────── */
.category-list { display:flex; flex-direction:column; gap:10px; padding:16px; }
.category-row {
    display:flex; align-items:center; background:var(--card);
    border-radius:var(--r-lg); padding:18px 20px; cursor:pointer; gap:16px;
    transition:background .15s;
}
.category-row:hover { background:var(--raised); }
.category-row--locked { opacity:.4; cursor:default; }
.category-row--locked:hover { background:var(--card); }
.category-icon  { display:flex; align-items:center; justify-content:center; width:28px; color:var(--text2); flex-shrink:0; }
.category-label { flex:1; font-size:1rem; font-weight:500; }
.category-chevron { font-size:1.4rem; }
.category-soon  { font-size:.75rem; color:var(--text3); background:var(--raised); padding:3px 8px; border-radius:6px; }

/* ── Search ────────────────────────────────────────────────────────────────── */
.search-wrap {
    display:flex; align-items:center;
    margin:12px 16px; background:var(--card);
    border-radius:var(--r-lg); border:1px solid var(--divider);
    padding:0 12px; transition:border-color .2s; flex-shrink:0;
}
.search-wrap:focus-within { border-color:var(--accent); }
.search-icon-svg { color:var(--text2); flex-shrink:0; }
.search-input {
    flex:1; background:transparent; border:none; outline:none;
    color:var(--text); font-size:1rem; padding:13px 10px; font-family:inherit;
}
.search-input::placeholder { color:var(--text3); }
.search-clear { background:transparent; border:none; color:var(--text2); cursor:pointer; font-size:.875rem; padding:4px; }

/* ── Sort / Tab Bars ───────────────────────────────────────────────────────── */
.sort-bar { display:flex; gap:8px; padding:0 16px 12px; flex-shrink:0; }
.sort-chip {
    flex:1; padding:9px 12px; background:var(--card); border:none;
    border-radius:var(--r-sm); color:var(--text2); font-size:.875rem;
    font-weight:500; cursor:pointer; transition:all .15s; font-family:inherit;
}
.sort-chip.active { color:var(--accent); background:rgba(33,150,243,.15); }
.tab-bar { display:flex; background:var(--surface); border-bottom:1px solid var(--divider); flex-shrink:0; }
.tab-item {
    flex:1; padding:14px 8px; background:transparent; border:none;
    border-bottom:2px solid transparent; color:var(--text2); font-size:.8125rem;
    font-weight:500; text-transform:uppercase; letter-spacing:.5px;
    cursor:pointer; transition:all .15s; font-family:inherit; text-align:center;
}
.tab-item.active { color:var(--accent); border-bottom-color:var(--accent); }

/* ── List Content ──────────────────────────────────────────────────────────── */
.list-content { flex:1; overflow-y:auto; padding:0 16px 24px; }
.arcana-header { display:flex; align-items:center; gap:8px; padding:12px 0 6px; }
.arcana-bar { width:3px; height:16px; border-radius:2px; flex-shrink:0; }
.arcana-label { font-size:.8125rem; font-weight:700; text-transform:uppercase; letter-spacing:1px; }
.row-card {
    display:flex; align-items:center; background:var(--card);
    border-radius:var(--r-md); padding:14px 16px; margin-bottom:8px;
    cursor:pointer; transition:background .15s; gap:14px;
}
.row-card:hover { background:var(--raised); }
.level-badge {
    padding:6px 10px; border-radius:var(--r-sm); font-size:.875rem;
    font-weight:700; flex-shrink:0; min-width:44px; text-align:center;
}
.row-main { flex:1; min-width:0; }
.row-name { font-size:1rem; font-weight:500; color:var(--text); }
.row-sub  { font-size:.875rem; color:var(--text2); margin-top:2px; }
.row-hint { font-size:.75rem; color:var(--text3); flex-shrink:0; }
.row-right { text-align:right; flex-shrink:0; }
.row-hp  { font-size:.875rem; color:var(--text2); }
.row-exp { font-size:.75rem; color:var(--text3); margin-top:2px; }
.empty-state { text-align:center; padding:60px 20px; color:var(--text2); font-size:1rem; }
.loading-wrap { display:flex; flex-direction:column; align-items:center; justify-content:center; padding:60px 20px; gap:16px; color:var(--text2); }
.spinner { width:36px; height:36px; border:3px solid var(--divider); border-top-color:var(--accent); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }

/* Completed Requests */
.row-card.completed {
    border-left: 4px solid #4CAF50;
}

/* ── Detail ────────────────────────────────────────────────────────────────── */
.detail-content { flex:1; overflow-y:auto; padding:16px; display:flex; flex-direction:column; gap:16px; }
.detail-hero { background:var(--card); border-radius:var(--r-xl); padding:20px; display:flex; align-items:center; gap:16px; }
.detail-level-box { width:64px; height:64px; border-radius:var(--r-lg); display:flex; flex-direction:column; align-items:center; justify-content:center; flex-shrink:0; }
.detail-level-label { font-size:.6875rem; font-weight:500; }
.detail-level-num   { font-size:1.75rem; font-weight:900; line-height:1; }
.detail-hero-info   { flex:1; min-width:0; }
.detail-hero-name   { font-size:1.5rem; font-weight:500; color:var(--text); }
.detail-hero-arcana { font-size:.9375rem; color:var(--text2); margin-top:2px; }
.detail-hero-trait  { font-size:.75rem; margin-top:4px; }
.detail-hero-image-wrap { display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-left: auto; max-width: 35%; height: 140px; }
.detail-hero-image { max-width: 100%; max-height: 100%; object-fit: contain; border-radius: var(--r-md); transition: transform 0.3s ease; filter: drop-shadow(0 4px 10px rgba(0,0,0,0.5)); }
.detail-hero-image:hover { transform: scale(1.1); }
.section-card { background:var(--card); border-radius:var(--r-lg); padding:16px; }
.section-title { font-size:1rem; font-weight:700; color:var(--text); margin-bottom:12px; }
.stat-row { display:flex; align-items:center; gap:10px; margin-bottom:8px; }
.stat-label { font-size:.875rem; color:var(--text2); width:36px; flex-shrink:0; }
.stat-bar-wrap { flex:1; height:8px; background:var(--raised); border-radius:4px; overflow:hidden; }
.stat-bar-fill { height:100%; border-radius:4px; transition:width .4s ease; }
.stat-val { font-size:.875rem; font-weight:700; color:var(--text); width:28px; text-align:right; flex-shrink:0; }
.info-row { display:flex; justify-content:space-between; align-items:center; padding:5px 0; }
.info-label { font-size:.875rem; color:var(--text2); }
.info-val   { font-size:.875rem; color:var(--text); font-weight:500; }
.skill-row { display:flex; justify-content:space-between; align-items:center; background:var(--raised); border-radius:var(--r-sm); padding:12px 14px; margin-bottom:6px; }
.skill-name  { font-size:.9375rem; color:var(--text); }
.skill-level { font-size:.75rem; }
.affinity-group { margin-bottom:10px; }
.affinity-label { font-size:.75rem; color:var(--text2); margin-bottom:6px; }
.chips { display:flex; flex-wrap:wrap; gap:6px; }
.chip { padding:4px 10px; border-radius:6px; font-size:.75rem; font-weight:500; }
.resist-text { font-size:.875rem; color:var(--text); line-height:1.8; }
.unlock-box { background:rgba(42,42,62,.8); border-radius:var(--r-lg); padding:16px; display:flex; align-items:flex-start; gap:12px; }
.unlock-icon  { font-size:1.25rem; flex-shrink:0; margin-top:2px; }
.unlock-label { font-size:.75rem; color:#FFD700; margin-bottom:4px; }
.unlock-text  { font-size:.9375rem; color:var(--text); }
.desc-box { background:var(--card); border-radius:var(--r-lg); padding:16px; font-size:.9375rem; color:var(--text2); line-height:1.6; }

/* ── Classroom ─────────────────────────────────────────────────────────────── */
.qa-card { background:var(--card); border-radius:var(--r-md); padding:14px 16px; margin-bottom:8px; }
.qa-date     { font-size:.75rem; color:var(--text3); margin-bottom:6px; }
.qa-question { font-size:.9375rem; color:var(--text2); margin-bottom:8px; line-height:1.5; }
.qa-answer   { font-size:1rem; font-weight:500; color:var(--text); }

/* ── Settings ──────────────────────────────────────────────────────────────── */
.setting-row { display:flex; align-items:center; justify-content:space-between; padding:12px 0; cursor:pointer; border-bottom:1px solid var(--divider); }
.setting-row:last-child { border-bottom:none; }
.setting-info { flex:1; }
.setting-label { font-size:.9375rem; color:var(--text); }
.setting-desc  { font-size:.75rem; color:var(--text2); margin-top:2px; }
.toggle { width:44px; height:24px; border-radius:12px; background:var(--divider); position:relative; transition:background .2s; flex-shrink:0; margin-left:16px; }
.toggle::after { content:''; position:absolute; width:20px; height:20px; border-radius:50%; background:#fff; top:2px; left:2px; transition:transform .2s; box-shadow:0 1px 3px rgba(0,0,0,.4); }
.toggle.on { background:#4CAF50; }
.toggle.on::after { transform:translateX(20px); }

/* ── Fusion ────────────────────────────────────────────────────────────────── */
.fusion-hint  { padding:12px 16px; color:var(--text2); font-size:.9rem; }
.fusion-count { padding:8px 16px 4px; color:var(--text2); font-size:.875rem; }
.fusion-selected-card { display:flex; align-items:center; background:var(--card); margin:12px 16px 4px; border-radius:var(--r-lg); padding:14px 16px; gap:12px; }
.fusion-selected-info { flex:1; }
.fusion-selected-name { font-size:1.1rem; font-weight:700; color:var(--text); }
.fusion-selected-sub  { font-size:.875rem; margin-top:2px; }
.fusion-recipe-card { display:flex; align-items:center; background:var(--card); margin:0 16px 8px; border-radius:var(--r-lg); padding:14px 16px; gap:8px; }
.fusion-recipe-card--vertical { flex-direction:column; align-items:flex-start; gap:4px; }
.fusion-ingredient   { flex:1; cursor:pointer; padding:4px 6px; border-radius:8px; transition:background .15s; }
.fusion-ingredient:hover { background:rgba(255,255,255,.06); }
.fusion-ingredient-v { width:100%; cursor:pointer; padding:6px 8px; border-radius:8px; transition:background .15s; }
.fusion-ingredient-v:hover { background:rgba(255,255,255,.06); }
.fusion-ing-name { font-size:.9375rem; font-weight:600; }
.fusion-ing-sub  { font-size:.8rem; color:var(--text2); margin-top:1px; }
.fusion-plus   { font-size:1.25rem; font-weight:700; padding:0 4px; flex-shrink:0; }
.fusion-plus-v { font-size:1rem; font-weight:700; padding:2px 8px; }

/* ══════════════════════════════════════════════════════════════════════════════
   TABLET / DESKTOP ADAPTIVE LAYOUT  (≥840px)
   Mirrors Android's adaptive layout:
   - Persistent navigation rail on the left
   - Content constrained and centered
   - Two-pane for list+detail screens
══════════════════════════════════════════════════════════════════════════════ */

/* Two-pane body: phone = single column, tablet = side-by-side */
.two-pane-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0; /* critical for flex children to scroll */
}
.pane-list {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}
/* Detail pane hidden on phone */
.pane-detail {
    display: none;
}
.detail-placeholder {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text3);
    font-size: 1rem;
    flex-direction: column;
    gap: 12px;
}
.detail-placeholder-icon { font-size: 3rem; opacity: .3; }

@media (min-width: 840px) {
    #nav-rail { display:flex; }
    #content-area { margin-left: var(--rail-w); }

    /* No max-width cap — fill the space */
    .home-content,
    .game-list,
    .category-list { padding: 24px 40px; }

    .series-list { flex-direction:row; gap:16px; flex:1; }
    .series-card { flex:1 1 0; min-width:0; min-height:0; margin:0; }

    .game-btn { border-radius:var(--r-xl); }

    /* Two-pane: show detail pane */
    .pane-list {
        width: 25rem;
        min-width: 20rem;
        flex: none;
        border-right: 1px solid var(--divider);
    }
    .pane-list .search-wrap { margin: 16px 16px 12px; }
    .pane-list .sort-bar    { padding: 0 16px 12px; }
    .pane-list .list-content { padding: 0 16px 24px; }

    .pane-detail {
        display: flex;
        flex-direction: column;
        flex: 1;
        overflow: hidden;
    }
    .pane-detail .detail-content {
        padding: 24px 40px;
    }

    /* Phone-only screens hidden on tablet */
    #screen-detail,
    #screen-sldetail { display: none !important; }

    /* Settings */
    #screen-settings .detail-content { max-width: 700px; margin: 0 auto; padding: 24px 40px; }

    /* Fusion pane */
    .fusion-selected-card,
    .fusion-recipe-card { margin-left: 0; margin-right: 0; }
    .fusion-hint, .fusion-count { padding-left: 0; padding-right: 0; }
}

@media (min-width: 1200px) {
    :root { --rail-w: 6rem; }
    .rail-item { width: 5rem; }
}

@media (min-width: 1600px) {
    :root { --rail-w: 6.5rem; }
}