:root {
    --bg-dark: #0f0e17;
    --bg-card: #1a1927;
    --bg-card-hover: #232136;
    --accent-primary: #e8a0bf;
    --accent-secondary: #7f5af0;
    --accent-tertiary: #2cb67d;
    --text-primary: #fffffe;
    --text-secondary: #94a1b2;
    --text-muted: #72757e;
    --border: rgba(255,255,255,0.06);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --shadow-glow: 0 0 40px rgba(127,90,240,0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.bg-gradient {
    position: fixed; inset: 0; z-index: 0;
    background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(127,90,240,0.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 80%, rgba(232,160,191,0.10) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 50% 50%, rgba(44,182,125,0.06) 0%, transparent 50%);
    animation: bgShift 20s ease-in-out infinite alternate;
}
@keyframes bgShift { 0%{opacity:1} 50%{opacity:.7} 100%{opacity:1} }

.app { position: relative; z-index: 1; max-width: 1400px; margin: 0 auto; padding: 0 24px; }

header { padding: 48px 0 32px; text-align: center; }
.logo {
    font-family: 'Playfair Display', serif; font-size: 3rem; font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: -1px;
}
.logo-sub {
    font-size: 0.95rem; color: var(--text-secondary); margin-top: 6px;
    font-weight: 300; letter-spacing: 2px; text-transform: uppercase;
}

/* ─── Auth Container ─────────────────────────────────── */
header { position: relative; }
.auth-container {
    position: absolute; top: 48px; right: 0;
    display: flex; align-items: center; gap: 12px;
}
.btn-auth {
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    border: none; color: white; padding: 10px 18px; border-radius: var(--radius-sm);
    font-size: 0.85rem; font-weight: 500; cursor: pointer; display: flex; align-items: center; gap: 8px;
    transition: var(--transition); box-shadow: 0 4px 15px rgba(127,90,240,0.3);
}
.btn-auth:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(127,90,240,0.4); }
.user-info {
    display: flex; align-items: center; gap: 10px;
    background: var(--bg-card); padding: 6px 12px 6px 6px;
    border-radius: 50px; border: 1px solid var(--border);
}
.user-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; }
.user-name { font-size: 0.85rem; color: var(--text-secondary); max-width: 120px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.btn-sm {
    background: none; border: none; color: var(--text-muted); padding: 6px;
    border-radius: 6px; cursor: pointer; transition: var(--transition); display: flex;
}
.btn-sm:hover { color: var(--accent-primary); background: rgba(255,255,255,0.05); }
.sync-status {
    font-size: 0.75rem; color: var(--accent-tertiary); display: flex; align-items: center; gap: 4px;
}
.sync-status.syncing { color: var(--accent-secondary); }
.sync-status.error { color: #f87171; }

/* ─── Stats ──────────────────────────────────────────── */
.stats-bar { display: flex; justify-content: center; gap: 32px; margin: 24px 0 36px; flex-wrap: wrap; }
.stat-item {
    text-align: center; cursor: pointer; padding: 12px 20px; border-radius: var(--radius);
    border: 1px solid transparent; transition: var(--transition);
}
.stat-item:hover { background: var(--bg-card); border-color: var(--border); }
.stat-item.active { background: var(--bg-card); border-color: var(--accent-secondary); box-shadow: 0 0 20px rgba(127,90,240,0.15); }
.stat-number {
    font-size: 2rem; font-weight: 700; font-family: 'JetBrains Mono', monospace;
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1.5px; margin-top: 2px; }

.stat-detail {
    display: none; margin-bottom: 28px; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; max-height: 360px; overflow-y: auto;
    animation: fadeIn .2s ease;
}
.stat-detail.active { display: block; }
.stat-detail-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.stat-detail-header h3 { font-family: 'Playfair Display', serif; font-size: 1.2rem; }
.stat-detail-close {
    background: none; border: none; color: var(--text-muted); font-size: 1.3rem;
    cursor: pointer; padding: 4px 8px; border-radius: 6px; transition: var(--transition);
}
.stat-detail-close:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
.stat-detail-list { display: flex; flex-wrap: wrap; gap: 8px; }
.stat-detail-item {
    padding: 6px 14px; border-radius: 50px; background: rgba(127,90,240,0.1);
    border: 1px solid rgba(127,90,240,0.15); color: var(--text-secondary);
    font-size: 0.8rem; cursor: pointer; transition: var(--transition);
}
.stat-detail-item:hover { background: rgba(127,90,240,0.2); color: var(--text-primary); }
.stat-detail-item .detail-count {
    display: inline-block; background: rgba(255,255,255,0.1); padding: 1px 7px;
    border-radius: 50px; font-size: 0.7rem; margin-left: 6px; font-family: 'JetBrains Mono', monospace;
}

/* ─── Toolbar ────────────────────────────────────────── */
.toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 28px; }
.search-box { flex: 1; min-width: 240px; position: relative; }
.search-box input {
    width: 100%; padding: 14px 20px 14px 48px; background: var(--bg-card);
    border: 1px solid var(--border); border-radius: var(--radius); color: var(--text-primary);
    font-size: 0.95rem; font-family: 'Inter', sans-serif; transition: var(--transition); outline: none;
}
.search-box input:focus { border-color: var(--accent-secondary); box-shadow: 0 0 0 3px rgba(127,90,240,0.15); }
.search-box input::placeholder { color: var(--text-muted); }
.search-box svg.search-icon { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.search-box .search-hint {
    position: absolute; right: 14px; top: 50%; transform: translateY(-50%);
    font-size: 0.7rem; color: var(--text-muted); pointer-events: none;
    font-family: 'JetBrains Mono', monospace; opacity: 0; transition: opacity .2s;
}
.search-box input:focus ~ .search-hint { opacity: 1; }

/* ─── Language toggle ────────────────────────────────── */
.lang-toggle {
    display: flex; gap: 2px; background: var(--bg-card); border-radius: 10px;
    padding: 3px; border: 1px solid var(--border); flex-shrink: 0;
}
.lang-btn {
    background: none; border: none; color: var(--text-muted); font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace; font-weight: 600; letter-spacing: 0.5px;
    padding: 6px 10px; border-radius: 7px; cursor: pointer; transition: var(--transition);
    line-height: 1;
}
.lang-btn:hover { color: var(--text-secondary); background: rgba(255,255,255,0.04); }
.lang-btn.active {
    background: var(--accent-secondary); color: var(--text-primary);
    box-shadow: 0 0 8px rgba(127,90,240,0.3);
}

/* ─── Search dropdown ────────────────────────────────── */
.search-dropdown {
    display: none; position: absolute; top: calc(100% + 6px); left: 0; right: 0;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
    z-index: 100; box-shadow: var(--shadow); max-height: 420px; overflow-y: auto;
}
.search-dropdown.active { display: block; animation: slideUp .2s ease; }
.search-dropdown-header {
    padding: 10px 16px; font-size: 0.7rem; font-weight: 600; letter-spacing: 0.5px;
    text-transform: uppercase; color: var(--text-muted); border-bottom: 1px solid var(--border);
}
.search-result-item {
    display: flex; align-items: center; gap: 14px; padding: 12px 16px;
    cursor: pointer; transition: var(--transition); border-bottom: 1px solid rgba(255,255,255,0.03);
}
.search-result-item:hover { background: rgba(127,90,240,0.08); }
.search-result-item:last-child { border-bottom: none; }
.search-result-cover {
    width: 40px; height: 60px; border-radius: 4px; object-fit: cover; flex-shrink: 0;
    background: var(--bg-card-hover);
}
.search-result-info { flex: 1; min-width: 0; }
.search-result-title {
    font-size: 0.85rem; font-weight: 600; color: var(--text-primary);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.search-result-author {
    font-size: 0.75rem; color: var(--text-secondary); margin-top: 2px;
}
.search-result-add {
    padding: 6px 14px; border-radius: 50px; border: 1px solid var(--accent-secondary);
    background: transparent; color: var(--accent-secondary); font-size: 0.7rem; font-weight: 600;
    cursor: pointer; transition: var(--transition); flex-shrink: 0;
}
.search-result-add:hover { background: var(--accent-secondary); color: white; }
.search-result-add.added { border-color: var(--accent-primary); color: var(--accent-primary); pointer-events: none; }
.search-loading {
    padding: 20px; text-align: center; color: var(--text-muted); font-size: 0.85rem;
}
.search-loading .spinner {
    display: inline-block; width: 16px; height: 16px; border: 2px solid var(--border);
    border-top-color: var(--accent-secondary); border-radius: 50%;
    animation: spin .6s linear infinite; margin-right: 8px; vertical-align: middle;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Buttons ────────────────────────────────────────── */
.btn {
    padding: 14px 24px; border-radius: var(--radius); border: 1px solid var(--border);
    background: var(--bg-card); color: var(--text-primary); font-family: 'Inter', sans-serif;
    font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: var(--transition);
    white-space: nowrap; display: flex; align-items: center; gap: 8px;
}
.btn:hover { background: var(--bg-card-hover); border-color: rgba(255,255,255,0.12); transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--accent-secondary), #9b6dff); border: none; color: white; }
.btn-primary:hover { box-shadow: 0 4px 20px rgba(127,90,240,0.4); transform: translateY(-2px); }
.btn-danger { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.25); color: #f87171; }
.btn-danger:hover { background: rgba(239,68,68,0.22); }

/* ─── Filter bar ─────────────────────────────────────── */
.filter-bar {
    display: flex; gap: 8px; margin-bottom: 32px; overflow-x: auto; padding-bottom: 8px;
    scrollbar-width: thin; scrollbar-color: var(--bg-card-hover) transparent;
}
.filter-chip {
    padding: 8px 18px; border-radius: 50px; background: var(--bg-card); border: 1px solid var(--border);
    color: var(--text-secondary); font-size: 0.8rem; font-weight: 500; cursor: pointer;
    transition: var(--transition); white-space: nowrap; font-family: 'Inter', sans-serif;
}
.filter-chip:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.filter-chip.active { background: linear-gradient(135deg, var(--accent-secondary), #9b6dff); border-color: transparent; color: white; }
.filter-chip .chip-count {
    display: inline-block; background: rgba(255,255,255,0.15); padding: 1px 7px;
    border-radius: 50px; font-size: 0.7rem; margin-left: 6px;
}

/* ─── Book grid ──────────────────────────────────────── */
.book-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px; padding-bottom: 80px;
}
.book-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; transition: var(--transition); position: relative;
    animation: fadeInUp 0.4s ease-out both;
}
.book-card:hover { transform: translateY(-4px); box-shadow: var(--shadow), var(--shadow-glow); border-color: rgba(127,90,240,0.2); }
@keyframes fadeInUp { from{opacity:0;transform:translateY(20px)} to{opacity:1;transform:translateY(0)} }
@keyframes fadeIn { from{opacity:0} to{opacity:1} }

.book-cover-wrapper {
    position: relative; width: 100%; aspect-ratio: 2/3; overflow: hidden;
    background: linear-gradient(145deg, #1e1d2f, #16152a);
}
.book-cover-wrapper img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.book-card:hover .book-cover-wrapper img { transform: scale(1.05); }
.book-cover-placeholder {
    width: 100%; height: 100%; display: flex; flex-direction: column;
    align-items: center; justify-content: center; padding: 24px; text-align: center;
}
.book-cover-placeholder .placeholder-icon { font-size: 2.5rem; margin-bottom: 12px; opacity: 0.5; }
.book-cover-placeholder .placeholder-title {
    font-family: 'Playfair Display', serif; font-size: 1rem; font-weight: 700;
    line-height: 1.3; color: var(--text-secondary);
}

.book-info { padding: 16px 18px 18px; }
.book-title {
    font-family: 'Playfair Display', serif; font-size: 1rem; font-weight: 700;
    line-height: 1.35; margin-bottom: 4px; display: -webkit-box;
    -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.book-author { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 10px; }
.book-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.book-tag { padding: 3px 10px; border-radius: 50px; font-size: 0.7rem; font-weight: 500; letter-spacing: 0.3px; }
.tag-category { background: rgba(127,90,240,0.15); color: #b794f6; }
.tag-series { background: rgba(232,160,191,0.15); color: var(--accent-primary); }
.tag-genre { background: rgba(44,182,125,0.12); color: #6ee7b7; }

.book-links {
    display: flex; gap: 6px; margin-top: 10px; padding-top: 10px;
    border-top: 1px solid var(--border);
}
.book-link {
    flex: 1; padding: 6px 10px; border-radius: 8px; text-decoration: none;
    font-size: 0.72rem; font-weight: 600; text-align: center; transition: var(--transition);
    letter-spacing: 0.3px;
}
.book-link-apple { background: rgba(127,90,240,0.12); color: #b794f6; }
.book-link-apple:hover { background: rgba(127,90,240,0.25); }
.book-link-amazon { background: rgba(251,191,36,0.12); color: #fbbf24; }
.book-link-amazon:hover { background: rgba(251,191,36,0.25); }

.book-card .remove-btn {
    position: absolute; top: 10px; right: 10px; width: 28px; height: 28px; border-radius: 50%;
    background: rgba(0,0,0,0.6); backdrop-filter: blur(8px); border: none; color: #f87171;
    font-size: 0.9rem; cursor: pointer; opacity: 0; transition: var(--transition);
    display: flex; align-items: center; justify-content: center; z-index: 5;
}
.book-card:hover .remove-btn { opacity: 1; }
.remove-btn:hover { background: rgba(239,68,68,0.5); color: white; }

/* ─── Modals ─────────────────────────────────────────── */
.modal-overlay {
    display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.7);
    backdrop-filter: blur(6px); z-index: 100; align-items: center; justify-content: center; padding: 24px;
}
.modal-overlay.active { display: flex; animation: fadeIn .2s ease; }
.modal {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 32px; width: 100%; max-width: 640px; max-height: 85vh; overflow-y: auto; box-shadow: var(--shadow);
}
.modal h2 { font-family: 'Playfair Display', serif; font-size: 1.5rem; margin-bottom: 8px; }
.modal p.subtitle { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 24px; line-height: 1.5; }
.modal textarea {
    width: 100%; min-height: 280px; padding: 16px; background: var(--bg-dark);
    border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace; font-size: 0.85rem; line-height: 1.7;
    resize: vertical; outline: none; transition: var(--transition);
}
.modal textarea:focus { border-color: var(--accent-secondary); box-shadow: 0 0 0 3px rgba(127,90,240,0.1); }
.modal textarea::placeholder { color: var(--text-muted); }
.modal-actions { display: flex; gap: 12px; margin-top: 20px; justify-content: flex-end; }

/* ─── Progress overlay ───────────────────────────────── */
.progress-overlay {
    display: none; position: fixed; bottom: 32px; left: 50%; transform: translateX(-50%);
    z-index: 200; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 28px; min-width: 380px; box-shadow: var(--shadow);
}
.progress-overlay.active { display: block; animation: slideUp .3s ease; }
@keyframes slideUp { from{opacity:0;transform:translateX(-50%) translateY(20px)} to{opacity:1;transform:translateX(-50%) translateY(0)} }
.progress-text { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 10px; }
.progress-bar-bg { height: 6px; background: rgba(255,255,255,0.06); border-radius: 3px; overflow: hidden; }
.progress-bar-fill {
    height: 100%; background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
    border-radius: 3px; transition: width .3s ease; width: 0%;
}
.progress-count { font-size: 0.75rem; color: var(--text-muted); margin-top: 6px; font-family: 'JetBrains Mono', monospace; }

/* ─── Toast ──────────────────────────────────────────── */
.toast {
    position: fixed; bottom: 32px; right: 32px; padding: 14px 22px; border-radius: var(--radius-sm);
    background: var(--bg-card); border: 1px solid var(--border); color: var(--text-primary);
    font-size: 0.85rem; z-index: 300; box-shadow: var(--shadow); opacity: 0;
    transform: translateY(10px); transition: var(--transition); pointer-events: none;
    display: flex; align-items: center; gap: 12px;
}
.toast.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.toast-undo {
    background: rgba(127,90,240,0.2); border: 1px solid rgba(127,90,240,0.3);
    color: #b794f6; padding: 4px 12px; border-radius: 6px; font-size: 0.8rem;
    font-weight: 600; cursor: pointer; font-family: 'Inter', sans-serif;
    transition: var(--transition); white-space: nowrap;
}
.toast-undo:hover { background: rgba(127,90,240,0.35); }

/* ─── Empty state ────────────────────────────────────── */
.empty-state { text-align: center; padding: 80px 24px; grid-column: 1 / -1; }
.empty-state .empty-icon { font-size: 4rem; margin-bottom: 16px; opacity: 0.4; }
.empty-state h3 { font-family: 'Playfair Display', serif; font-size: 1.3rem; margin-bottom: 8px; color: var(--text-secondary); }
.empty-state p { color: var(--text-muted); font-size: 0.9rem; max-width: 400px; margin: 0 auto; line-height: 1.6; }

/* ─── Scrollbar ──────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bg-card-hover); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #3a3760; }

/* ─── Sort dropdown ──────────────────────────────────── */
.sort-dropdown { position: relative; }
.sort-menu {
    display: none; position: absolute; top: calc(100% + 6px); right: 0;
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 6px; min-width: 200px; z-index: 50; box-shadow: var(--shadow);
}
.sort-menu.active { display: block; }
.sort-option {
    display: block; width: 100%; padding: 10px 14px; background: none; border: none;
    color: var(--text-secondary); font-size: 0.85rem; font-family: 'Inter', sans-serif;
    text-align: left; cursor: pointer; border-radius: 6px; transition: var(--transition);
}
.sort-option:hover { background: rgba(127,90,240,0.1); color: var(--text-primary); }
.sort-option.active { color: var(--accent-secondary); }

/* ─── Reading status chips on cards ──────────────────── */
.book-status {
    position: absolute; top: 10px; left: 10px; z-index: 5;
    padding: 4px 12px; border-radius: 50px; font-size: 0.65rem; font-weight: 600;
    letter-spacing: 0.5px; text-transform: uppercase; cursor: pointer;
    backdrop-filter: blur(8px); transition: var(--transition); border: none;
}
.book-status[data-status="tbr"] { background: rgba(127,90,240,0.7); color: white; }
.book-status[data-status="reading"] { background: rgba(251,191,36,0.8); color: #1a1927; }
.book-status[data-status="read"] { background: rgba(44,182,125,0.8); color: white; }
.book-status:hover { transform: scale(1.05); }

/* ─── Status filter bar ──────────────────────────────── */
.status-filter-bar {
    display: flex; gap: 8px; justify-content: center; margin-bottom: 16px;
}
.status-chip {
    padding: 6px 16px; border-radius: 50px; font-size: 0.75rem; font-weight: 600;
    cursor: pointer; transition: var(--transition); border: 1px solid var(--border);
    background: var(--bg-card); color: var(--text-secondary); font-family: 'Inter', sans-serif;
    text-transform: uppercase; letter-spacing: 0.5px;
}
.status-chip:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.status-chip.active { border-color: transparent; color: white; }
.status-chip[data-status="all"].active { background: linear-gradient(135deg, var(--accent-secondary), #9b6dff); }
.status-chip[data-status="tbr"].active { background: rgba(127,90,240,0.8); }
.status-chip[data-status="reading"].active { background: rgba(251,191,36,0.85); color: #1a1927; }
.status-chip[data-status="read"].active { background: rgba(44,182,125,0.85); }
.status-chip .chip-count {
    display: inline-block; background: rgba(255,255,255,0.15); padding: 1px 7px;
    border-radius: 50px; font-size: 0.65rem; margin-left: 6px;
}

/* ─── Book detail modal ──────────────────────────────── */
.detail-modal { max-width: 520px; }
.detail-cover { width: 100%; max-height: 340px; object-fit: contain; border-radius: var(--radius-sm); margin-bottom: 20px; background: linear-gradient(145deg, #1e1d2f, #16152a); }
.detail-title { font-family: 'Playfair Display', serif; font-size: 1.4rem; font-weight: 700; margin-bottom: 4px; }
.detail-author { color: var(--text-secondary); font-size: 0.95rem; margin-bottom: 12px; }
.detail-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.detail-section-label { font-size: 0.7rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; margin-top: 14px; }
.detail-description {
    color: var(--text-secondary); font-size: 0.85rem; line-height: 1.7;
    max-height: 180px; overflow-y: auto; padding-right: 8px;
}
.detail-price { font-family: 'JetBrains Mono', monospace; color: var(--accent-tertiary); font-size: 0.9rem; font-weight: 600; }
.detail-links { display: flex; gap: 10px; margin-top: 18px; }
.detail-links .book-link { padding: 10px 20px; font-size: 0.8rem; }
.detail-status-bar { display: flex; gap: 8px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.detail-status-btn {
    flex: 1; padding: 10px; border-radius: var(--radius-sm); border: 1px solid var(--border);
    background: var(--bg-dark); color: var(--text-secondary); font-family: 'Inter', sans-serif;
    font-size: 0.8rem; font-weight: 600; cursor: pointer; transition: var(--transition);
    text-transform: uppercase; letter-spacing: 0.5px;
}
.detail-status-btn:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.detail-status-btn.active-tbr { background: rgba(127,90,240,0.2); border-color: var(--accent-secondary); color: var(--accent-secondary); }
.detail-status-btn.active-reading { background: rgba(251,191,36,0.15); border-color: #fbbf24; color: #fbbf24; }
.detail-status-btn.active-read { background: rgba(44,182,125,0.15); border-color: var(--accent-tertiary); color: var(--accent-tertiary); }

/* ─── Progress cancel button ─────────────────────────── */
.progress-cancel {
    margin-top: 10px; width: 100%; padding: 8px; border-radius: var(--radius-sm);
    background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.25);
    color: #f87171; font-family: 'Inter', sans-serif; font-size: 0.8rem;
    font-weight: 600; cursor: pointer; transition: var(--transition);
}
.progress-cancel:hover { background: rgba(239,68,68,0.25); }
/* ─── For You button ─────────────────────────────── */
.btn-recs {
    background: linear-gradient(135deg, rgba(232,160,191,0.15), rgba(127,90,240,0.15));
    border-color: rgba(232,160,191,0.3); color: var(--accent-primary);
}
.btn-recs:hover {
    background: linear-gradient(135deg, rgba(232,160,191,0.25), rgba(127,90,240,0.25));
    border-color: rgba(232,160,191,0.5); box-shadow: 0 4px 20px rgba(232,160,191,0.2);
    transform: translateY(-2px);
}

/* ─── Recommendations modal ────────────────────── */
.recs-modal { max-width: 780px; }
.recs-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
.recs-header h2 { font-family: 'Playfair Display', serif; font-size: 1.5rem; margin-bottom: 4px; }
.recs-header .subtitle { margin-bottom: 0; }
.recs-close-btn { padding: 8px 14px; font-size: 1.2rem; line-height: 1; min-width: auto; }
.recs-loading {
    display: flex; align-items: center; gap: 12px; justify-content: center;
    padding: 48px 0; color: var(--text-secondary); font-size: 0.9rem;
    grid-column: 1 / -1;
}
.recs-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 16px;
    min-height: 120px;
}
.recs-card {
    background: var(--bg-dark); border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: 12px; text-align: center; transition: var(--transition); cursor: default;
    position: relative; overflow: hidden;
}
.recs-card:hover { border-color: rgba(232,160,191,0.3); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.3); }
.recs-card-cover {
    width: 100%; aspect-ratio: 2/3; object-fit: cover; border-radius: 6px;
    margin-bottom: 10px; background: linear-gradient(145deg, #1e1d2f, #16152a);
}
.recs-card-title {
    font-family: 'Playfair Display', serif; font-size: 0.8rem; font-weight: 600;
    line-height: 1.3; margin-bottom: 4px; display: -webkit-box; -webkit-line-clamp: 2;
    line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.recs-card-author { font-size: 0.7rem; color: var(--text-secondary); margin-bottom: 8px; }
.recs-card-reason {
    font-size: 0.65rem; color: var(--text-muted); line-height: 1.4;
    font-style: italic; padding-top: 8px; border-top: 1px solid var(--border);
}
.recs-card-add {
    position: absolute; top: 8px; right: 8px; width: 26px; height: 26px;
    border-radius: 50%; background: var(--accent-secondary); border: none;
    color: white; font-size: 1.1rem; cursor: pointer; display: flex;
    align-items: center; justify-content: center; opacity: 0;
    transition: var(--transition); line-height: 1;
}
.recs-card:hover .recs-card-add { opacity: 1; }
.recs-card-add:hover { transform: scale(1.15); box-shadow: 0 2px 10px rgba(127,90,240,0.4); }
.recs-card-add.added { background: var(--accent-tertiary); opacity: 1; pointer-events: none; }
.recs-actions { display: flex; gap: 12px; justify-content: flex-end; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }
.recs-error { text-align: center; padding: 40px 0; color: var(--text-muted); font-size: 0.9rem; grid-column: 1 / -1; }

/* ─── Responsive: Tablet ─────────────────────────────── */
@media (max-width: 1024px) {
    .app { padding: 0 16px; }
    .book-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; }
    .stats-bar { gap: 16px; }
}

/* ─── Responsive: Mobile ─────────────────────────────── */
@media (max-width: 768px) {
    .app { padding: 0 12px; padding-bottom: 20px; }
    
    /* Header */
    header { padding: 20px 0 16px; }
    .logo { font-size: 1.8rem; }
    .logo-sub { font-size: 0.7rem; letter-spacing: 1px; }
    
    /* Auth container - move below logo on mobile */
    .auth-container {
        position: static;
        justify-content: center;
        margin-top: 12px;
    }
    .btn-auth { padding: 8px 14px; font-size: 0.8rem; }
    .user-info { padding: 4px 10px 4px 4px; }
    .user-avatar { width: 24px; height: 24px; }
    .user-name { max-width: 80px; font-size: 0.75rem; }
    
    /* Stats */
    .stats-bar { gap: 8px; margin: 16px 0 20px; }
    .stat-item { padding: 8px 10px; }
    .stat-number { font-size: 1.3rem; }
    .stat-label { font-size: 0.65rem; letter-spacing: 1px; }
    
    /* Stat detail */
    .stat-detail { padding: 16px; max-height: 280px; }
    .stat-detail-item { padding: 5px 10px; font-size: 0.75rem; }
    
    /* Toolbar */
    .toolbar { 
        flex-direction: column; 
        gap: 10px;
        position: sticky;
        top: 0;
        background: var(--bg-dark);
        padding: 12px 0;
        z-index: 100;
        margin: 0 -12px;
        padding-left: 12px;
        padding-right: 12px;
    }
    .search-box { min-width: 100%; order: 1; }
    .search-box input { padding: 12px 16px 12px 42px; font-size: 0.9rem; }
    .search-hint { display: none; }
    
    /* Toolbar buttons row */
    .toolbar .btn { 
        padding: 10px 12px; 
        font-size: 0.8rem;
        flex: 1;
        justify-content: center;
    }
    .toolbar .btn svg { width: 14px; height: 14px; }
    .toolbar .btn-primary { order: 2; }
    .toolbar .btn-recs { order: 3; }
    .toolbar .sort-dropdown { order: 4; flex: 1; }
    .toolbar .sort-dropdown .btn { width: 100%; }
    .toolbar #btnExport, .toolbar #btnImport { display: none; } /* Hide less important on mobile */
    .toolbar #btnClear { order: 10; flex: 0.5; }
    
    /* Status filter */
    .status-filter-bar { gap: 6px; margin-bottom: 12px; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
    .status-chip { padding: 6px 12px; font-size: 0.75rem; white-space: nowrap; }
    
    /* Category filter */
    .filter-bar { gap: 6px; margin-bottom: 16px; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
    .filter-chip { padding: 5px 10px; font-size: 0.7rem; white-space: nowrap; }
    
    /* Book grid */
    .book-grid { 
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); 
        gap: 10px; 
    }
    .book-card { border-radius: 12px; }
    .book-cover { border-radius: 10px; }
    .book-info { padding: 10px; }
    .book-title { font-size: 0.8rem; -webkit-line-clamp: 2; }
    .book-author { font-size: 0.65rem; }
    .book-meta { gap: 4px; margin-top: 6px; }
    .book-tag { font-size: 0.55rem; padding: 2px 5px; }
    .book-status { width: 20px; height: 20px; }
    .book-status svg { width: 10px; height: 10px; }
    
    /* Search dropdown */
    .search-dropdown { max-height: 60vh; }
    .search-result-item { padding: 10px; }
    .search-result-cover { width: 40px; height: 60px; }
    .search-result-title { font-size: 0.85rem; }
    .search-result-author { font-size: 0.7rem; }
    .search-result-add { padding: 6px 10px; font-size: 0.7rem; }
    
    /* Modals */
    .modal { 
        width: 95vw; 
        max-width: none; 
        max-height: 90vh;
        margin: 5vh auto;
        padding: 20px;
        border-radius: 16px;
    }
    .modal h2 { font-size: 1.3rem; }
    .modal textarea { min-height: 120px; font-size: 0.9rem; }
    .modal-actions { flex-direction: column; gap: 8px; }
    .modal-actions .btn { width: 100%; justify-content: center; }
    
    /* Detail modal */
    .detail-modal { padding: 16px; }
    .detail-cover { width: 100px; height: 150px; }
    .detail-title { font-size: 1.2rem; }
    .detail-author { font-size: 0.9rem; }
    .detail-section h4 { font-size: 0.8rem; }
    .detail-desc { font-size: 0.85rem; max-height: 120px; }
    .detail-actions { flex-wrap: wrap; gap: 8px; }
    .detail-actions .btn { flex: 1; min-width: 45%; justify-content: center; font-size: 0.75rem; padding: 10px; }
    
    /* Progress overlay */
    .progress-overlay { min-width: 90vw; padding: 24px 20px; }
    .progress-text { font-size: 0.9rem; }
    
    /* Recommendations modal */
    .recs-grid { grid-template-columns: repeat(auto-fill, minmax(130px, 1fr)); gap: 12px; }
    .recs-card-info { padding: 10px; }
    .recs-card-title { font-size: 0.8rem; }
    .recs-card-author { font-size: 0.65rem; }
    .recs-actions { flex-direction: column; }
    .recs-actions .btn { width: 100%; justify-content: center; }
    
    /* Toast */
    .toast { 
        bottom: 20px; 
        left: 12px; 
        right: 12px; 
        transform: none;
        max-width: none;
    }
}

/* ─── Responsive: Small phones ───────────────────────── */
@media (max-width: 375px) {
    .logo { font-size: 1.5rem; }
    .book-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .stat-item { padding: 6px 8px; }
    .stat-number { font-size: 1.1rem; }
    .stats-bar { gap: 4px; }
}