/* ================================================================
   theme.css — Shared design tokens, reset, and components
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ======================== RESET ======================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-variant-ligatures: none;
}

/* ======================== DARK THEME (default) ======================== */
:root {
    /* Backgrounds */
    --bg-primary: #09090b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --bg-elevated: #1e1e22;
    --bg-hover: #252529;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);

    /* Overlays (for hover/active states that invert in light mode) */
    --overlay-subtle: rgba(255, 255, 255, 0.04);
    --overlay-hover: rgba(255, 255, 255, 0.06);
    --overlay-active: rgba(255, 255, 255, 0.08);

    /* Text */
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    --text-muted: #52525b;

    /* Accents */
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-blue-dim: rgba(59, 130, 246, 0.12);
    --accent-green: #22c55e;
    --accent-green-subtle: #10b981;
    --accent-green-dim: rgba(34, 197, 94, 0.15);
    --accent-teal: #2dd4bf;
    --accent-teal-dim: rgba(45, 212, 191, 0.12);
    --accent-orange: #f59e0b;
    --accent-orange-dim: rgba(245, 158, 11, 0.12);
    --accent-red: #ef4444;
    --accent-red-dim: rgba(239, 68, 68, 0.15);

    /* Layout */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Menlo', 'Monaco', 'Courier New', monospace;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Table */
    --bg-table-row-hover: rgba(255, 255, 255, 0.03);
    --bg-table-header: rgba(255, 255, 255, 0.02);

    /* Shadows */
    --shadow-card: none;
    --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-nav-tab: none;
    --shadow-dropdown: 0 8px 32px rgba(0, 0, 0, 0.3);

    /* Difficulty glow */
    --glow-green: 0 0 8px rgba(34, 197, 94, 0.35);
    --glow-orange: 0 0 8px rgba(245, 158, 11, 0.35);
    --glow-red: 0 0 8px rgba(239, 68, 68, 0.35);
}

/* ======================== LIGHT THEME ======================== */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --bg-elevated: #e9ecef;
    --bg-hover: #dee2e6;

    --border-subtle: rgba(0, 0, 0, 0.06);
    --border-default: rgba(0, 0, 0, 0.10);
    --border-strong: rgba(0, 0, 0, 0.18);

    --overlay-subtle: rgba(0, 0, 0, 0.03);
    --overlay-hover: rgba(0, 0, 0, 0.05);
    --overlay-active: rgba(0, 0, 0, 0.07);

    --text-primary: #111113;
    --text-secondary: #495057;
    --text-tertiary: #868e96;
    --text-muted: #adb5bd;

    --accent-blue: #2563eb;
    --accent-blue-hover: #1d4ed8;
    --accent-blue-dim: rgba(37, 99, 235, 0.08);
    --accent-green: #16a34a;
    --accent-green-subtle: #059669;
    --accent-green-dim: rgba(22, 163, 74, 0.08);
    --accent-teal: #0d9488;
    --accent-teal-dim: rgba(13, 148, 136, 0.08);
    --accent-orange: #d97706;
    --accent-orange-dim: rgba(217, 119, 6, 0.08);
    --accent-red: #dc2626;
    --accent-red-dim: rgba(220, 38, 38, 0.08);

    --bg-table-row-hover: rgba(0, 0, 0, 0.02);
    --bg-table-header: rgba(0, 0, 0, 0.02);

    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-card-hover: 0 10px 25px rgba(0, 0, 0, 0.08);
    --shadow-nav-tab: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-dropdown: 0 8px 24px rgba(0, 0, 0, 0.1);

    --glow-green: none;
    --glow-orange: none;
    --glow-red: none;
}

/* ======================== BODY ======================== */
html {
    height: 100%;
}

body {
    zoom: 0.9;
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-secondary);
    min-height: 100%;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* ======================== HEADER ======================== */
.header {
    padding: 0 20px;
    height: 56px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.header-content {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
    flex: 1 1 auto;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex-shrink: 0;
}

/* Brand */
.brand {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: -0.5px;
    white-space: nowrap;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

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

.brand-logo {
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

a.brand:hover .brand-logo {
    transform: scale(1.08);
}

/* ======================== NAV TABS ======================== */
.nav-tabs {
    display: flex;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: 3px;
    gap: 2px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.nav-tabs::-webkit-scrollbar {
    display: none;
}

.nav-tab {
    padding: 5px 14px;
    border-radius: calc(var(--radius-md) - 3px);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
    cursor: pointer;
    border: none;
    background: none;
    font-family: var(--font-sans);
}

.nav-tab:hover {
    color: var(--text-secondary);
    background: var(--overlay-hover);
}

.nav-tab.active {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    box-shadow: var(--shadow-nav-tab);
}

[data-theme="light"] .nav-tab.active {
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

/* ======================== SEARCH BOX ======================== */
.search-box {
    flex: 1;
    max-width: 360px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 7px 70px 7px 36px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 13px;
    font-family: var(--font-sans);
    outline: none;
    transition: all var(--transition-base);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-dim);
}

.search-box > svg {
    position: absolute;
    left: 11px;
    top: 50%;
    transform: translateY(-50%);
    width: 15px;
    height: 15px;
    color: var(--text-muted);
    pointer-events: none;
}

.search-shortcut {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 11px;
    font-family: var(--font-sans);
    color: var(--text-muted);
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.search-box.has-value .search-shortcut {
    opacity: 0;
}

.search-box .clear-btn {
    position: absolute;
    right: 1px;
    top: 1px;
    bottom: 1px;
    width: 32px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-muted);
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-box .clear-btn svg {
    width: 14px;
    height: 14px;
}

.search-box .clear-btn:hover {
    color: var(--text-secondary);
}

.search-box.has-value .clear-btn {
    opacity: 1;
    pointer-events: auto;
}

.search-box.has-value .search-shortcut {
    display: none;
}

/* ======================== THEME TOGGLE ======================== */
.theme-toggle {
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    color: var(--text-tertiary);
    border-radius: var(--radius-sm);
    width: 34px;
    height: 34px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.theme-toggle:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border-color: var(--border-strong);
}

.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: none; }
[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ======================== SCROLLBAR ======================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-strong);
}

/* ======================== FOCUS ======================== */
a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 2px solid var(--accent-blue);
    outline-offset: 2px;
}

/* ======================== STATS BAR ======================== */
.stats-bar {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 12px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.stat-item {
    text-align: center;
    min-width: 40px;
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    display: block;
    line-height: 1.2;
}

.stat-value.easy { color: var(--accent-green); }
.stat-value.medium { color: var(--accent-orange); }
.stat-value.hard { color: var(--accent-red); }

.stat-label {
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.stat-divider {
    width: 1px;
    height: 28px;
    background: var(--border-default);
    flex-shrink: 0;
}

/* ======================== PROGRESS BAR ======================== */
.stats-progress {
    flex: 1;
    height: 4px;
    background: var(--overlay-subtle);
    border-radius: 2px;
    overflow: hidden;
    display: flex;
    min-width: 100px;
}

.stats-progress-segment {
    height: 100%;
    transition: width 0.4s ease;
}

.stats-progress-segment.easy { background: var(--accent-green); }
.stats-progress-segment.medium { background: var(--accent-orange); }
.stats-progress-segment.hard { background: var(--accent-red); }

/* ======================== DIFFICULTY BADGE ======================== */
.difficulty-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 9px;
    border-radius: 20px;
    letter-spacing: 0.2px;
    flex-shrink: 0;
}

.difficulty-badge.easy {
    background: var(--accent-green-dim);
    color: var(--accent-green);
}

.difficulty-badge.medium {
    background: var(--accent-orange-dim);
    color: var(--accent-orange);
}

.difficulty-badge.hard {
    background: var(--accent-red-dim);
    color: var(--accent-red);
}

.ai-badge {
    font-size: 9px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(167, 139, 250, 0.15);
    color: #a78bfa;
    letter-spacing: 0.5px;
    vertical-align: middle;
}

.sd-badge {
    font-size: 9px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(45, 212, 191, 0.15);
    color: #2dd4bf;
    letter-spacing: 0.5px;
    vertical-align: middle;
}

/* ======================== CARD ANIMATIONS ======================== */
@keyframes cardFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.problem-card {
    animation: cardFadeIn 0.3s ease both;
}

.problem-card:nth-child(1) { animation-delay: 0.02s; }
.problem-card:nth-child(2) { animation-delay: 0.04s; }
.problem-card:nth-child(3) { animation-delay: 0.06s; }
.problem-card:nth-child(4) { animation-delay: 0.08s; }
.problem-card:nth-child(5) { animation-delay: 0.10s; }
.problem-card:nth-child(6) { animation-delay: 0.12s; }
.problem-card:nth-child(7) { animation-delay: 0.14s; }
.problem-card:nth-child(8) { animation-delay: 0.16s; }
.problem-card:nth-child(9) { animation-delay: 0.18s; }
.problem-card:nth-child(n+10) { animation-delay: 0.20s; }

/* ======================== USER MENU ======================== */
.user-menu {
    position: relative;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 3px 10px 3px 3px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 20px;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
}

.user-menu-trigger:hover {
    border-color: var(--border-strong);
    background: var(--bg-tertiary);
}

.user-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-blue-dim);
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    overflow: hidden;
    flex-shrink: 0;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-name {
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    width: 220px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-dropdown);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--transition-fast);
    z-index: 200;
    padding: 6px;
}

.user-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-user-info {
    padding: 8px 10px;
}

.dropdown-username {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.dropdown-email {
    display: block;
    font-size: 11px;
    color: var(--text-tertiary);
    margin-top: 2px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-default);
    margin: 4px 0;
}

.dropdown-item {
    width: 100%;
    padding: 7px 10px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 13px;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--overlay-hover);
    color: var(--text-primary);
}

/* Sign-in link (when not authenticated) */
.sign-in-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: 20px;
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.sign-in-btn:hover {
    border-color: var(--border-strong);
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ======================== SOLVED INDICATORS ======================== */
.solved-check {
    color: var(--accent-green);
    font-size: 14px;
    font-weight: 600;
}

.col-status {
    width: 32px;
    text-align: center;
}

.td-status {
    text-align: center;
    padding: 0 4px;
}

.problem-card.solved {
    opacity: 0.55;
}

.problem-card.solved:hover {
    opacity: 1;
}

.card-solved-check {
    color: var(--accent-green);
    font-size: 11px;
    font-weight: 500;
    margin-left: 2px;
}

/* ======================== SPLASH ANIMATION ======================== */
.splash-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
    transition: opacity 0.4s ease;
}
.splash-overlay.fade-out { opacity: 0; pointer-events: none; }
.splash-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}
.splash-logo { color: var(--text-primary); }
.splash-stroke {
    stroke-dasharray: 30;
    stroke-dashoffset: 30;
    animation: strokeDraw 0.6s ease forwards;
}
.splash-stroke:nth-child(2) { animation-delay: 0.1s; }
.splash-bar {
    stroke-dasharray: 12;
    stroke-dashoffset: 12;
    animation: strokeDraw 0.3s ease forwards;
    animation-delay: 0.35s;
}
.splash-dot {
    opacity: 0;
    animation: dotAppear 0.2s ease forwards;
    animation-delay: 0.5s;
}
@keyframes strokeDraw { to { stroke-dashoffset: 0; } }
@keyframes dotAppear { to { opacity: 1; } }
.splash-text {
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 8px;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(4px);
    animation: textReveal 0.4s ease forwards;
    animation-delay: 0.55s;
}
@keyframes textReveal {
    to { opacity: 1; transform: translateY(0); }
}

/* ======================== RESPONSIVE ======================== */
@media (max-width: 1024px) {
    .header {
        padding: 0 16px;
    }

    .header-content {
        gap: 12px;
    }

    .brand {
        font-size: 14px;
    }

    .nav-tabs {
        padding: 2px;
    }

    .nav-tab {
        padding: 4px 10px;
        font-size: 12px;
    }

    .search-box {
        max-width: 240px;
    }
}

@media (max-width: 768px) {
    .header {
        height: 48px;
        padding: 0 12px;
    }

    .search-box {
        display: none;
    }

    .stats-bar {
        gap: 12px;
        padding: 10px 14px;
    }

    .stat-value {
        font-size: 15px;
    }

    .user-name {
        display: none;
    }

    .user-menu-trigger {
        padding: 3px;
    }
}

/* ======================== CREATE PROBLEM BUTTON ======================== */
.create-problem-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: all var(--transition-fast);
}
.create-problem-btn:hover {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}
@media (max-width: 768px) {
    .create-problem-btn span { display: none; }
    .create-problem-btn { padding: 5px; }
}

/* ======================== COMMUNITY AUTHOR BADGE ======================== */
.community-author {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-left: 6px;
}
.card-author {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ======================== BOOKMARK / SAVE BUTTON ======================== */
.col-bookmark { width: 28px; }
.td-bookmark {
    text-align: center;
    padding: 0 2px;
}
.bookmark-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 3px;
    color: var(--text-muted);
    opacity: 0.25;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    vertical-align: middle;
    border-radius: 3px;
    position: relative;
}
.bookmark-btn:hover {
    opacity: 1;
    color: var(--accent-blue);
}
.bookmark-btn.active {
    opacity: 1;
    color: var(--accent-blue);
}
.bookmark-btn.active svg {
    fill: var(--accent-blue);
}
/* Brighten slightly on row/card hover */
tr:hover .bookmark-btn,
.problem-card:hover .bookmark-btn { opacity: 0.45; }
tr:hover .bookmark-btn.active,
tr:hover .bookmark-btn:hover,
.problem-card:hover .bookmark-btn.active,
.problem-card:hover .bookmark-btn:hover { opacity: 1; }

/* Save confirmation animation */
@keyframes save-pop {
    0% { transform: scale(1); }
    30% { transform: scale(1.4); }
    60% { transform: scale(0.9); }
    100% { transform: scale(1); }
}
@keyframes save-ring {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
    100% { box-shadow: 0 0 0 8px rgba(59, 130, 246, 0); }
}
.bookmark-btn.just-saved {
    animation: save-pop 0.35s ease;
}
.bookmark-btn.just-saved::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    animation: save-ring 0.5s ease forwards;
}

/* ======================== VIEW COUNT ======================== */
.td-views {
    text-align: center;
    padding: 0 2px;
}
.col-views {
    width: 50px;
    text-align: center;
    cursor: pointer;
}
.view-count {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
}

/* Saved toast */
.save-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    padding: 8px 16px;
    font-size: 13px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 200;
    opacity: 0;
    transition: all 0.2s ease;
    pointer-events: none;
}
.save-toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.save-toast svg {
    color: var(--accent-blue);
    flex-shrink: 0;
}

/* ======================== SAVE-TO-LIST POPOVER ======================== */
.save-popover {
    position: absolute;
    z-index: 100;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    min-width: 200px;
    max-width: 260px;
    padding: 6px 0;
    display: none;
}
.save-popover.visible { display: block; }
.save-popover-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-primary);
    transition: background var(--transition-fast);
}
.save-popover-item:hover { background: var(--bg-hover); }
.save-popover-item .check-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    border: 1.5px solid var(--border-default);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}
.save-popover-item .check-icon.checked {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #fff;
}
.save-popover-divider {
    height: 1px;
    background: var(--border-subtle);
    margin: 4px 0;
}
.save-popover-item.create-new {
    color: var(--accent-blue);
    font-weight: 500;
}
.save-popover-item.create-new svg { color: var(--accent-blue); }
.save-popover-input {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
}
.save-popover-input input {
    flex: 1;
    border: 1px solid var(--border-default);
    border-radius: 5px;
    padding: 5px 8px;
    font-size: 13px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
}
.save-popover-input input:focus { border-color: var(--accent-blue); }
.save-popover-input button {
    background: var(--accent-blue);
    color: #fff;
    border: none;
    border-radius: 5px;
    padding: 5px 10px;
    font-size: 12px;
    cursor: pointer;
    font-weight: 500;
}
.save-popover-input button:hover { opacity: 0.9; }

/* ======================== LIST FILTER DROPDOWN ======================== */
.list-filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border: 1px solid var(--border-default);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}
.list-filter-btn:hover { border-color: var(--text-muted); }
.list-filter-btn.active {
    border-color: var(--accent-blue);
    background: var(--accent-blue-dim, rgba(59,130,246,0.08));
    color: var(--accent-blue);
}
.list-filter-btn svg { flex-shrink: 0; }

.list-filter-dropdown {
    position: absolute;
    z-index: 100;
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    min-width: 180px;
    padding: 4px 0;
    display: none;
    margin-top: 4px;
}
.list-filter-dropdown.visible { display: block; }
.list-filter-option {
    padding: 8px 14px;
    font-size: 13px;
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background var(--transition-fast);
}
.list-filter-option:hover { background: var(--bg-hover); }
.list-filter-option.active {
    color: var(--accent-blue);
    font-weight: 500;
}
.list-filter-option .list-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.list-filter-option .list-count {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
    flex-shrink: 0;
}
.list-filter-option .delete-list-btn {
    background: none;
    border: none;
    padding: 2px;
    cursor: pointer;
    color: var(--text-muted);
    opacity: 0;
    transition: all var(--transition-fast);
    display: inline-flex;
    flex-shrink: 0;
    margin-left: -2px;
}
.list-filter-option:hover .delete-list-btn { opacity: 0.6; }
.list-filter-option .delete-list-btn:hover { opacity: 1; color: #ef4444; }
.list-filter-option.create-new {
    color: var(--accent-blue);
    font-weight: 500;
    gap: 6px;
}
.list-filter-option.create-new svg { flex-shrink: 0; }

/* ======================== HELP BUTTON ======================== */
.help-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.help-btn:hover {
    color: var(--text-primary);
    background: var(--overlay-hover);
    border-color: var(--border-strong);
}

/* ======================== TAB DESCRIPTION ======================== */
.tab-description {
    padding: 4px 0 8px;
    font-size: 13px;
    color: var(--text-tertiary);
    line-height: 1.5;
}

/* ======================== WELCOME MODAL ======================== */
.welcome-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    padding: 20px;
}

.welcome-modal-box {
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg, 12px);
    max-width: 560px;
    width: 100%;
    padding: 28px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.welcome-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}

.welcome-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.welcome-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: all var(--transition-fast);
}

.welcome-close:hover {
    color: var(--text-primary);
    background: var(--overlay-hover);
}

.welcome-subtitle {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
}

.welcome-cards {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.welcome-card {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 14px;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.welcome-card:hover {
    border-color: var(--border-strong);
    background: var(--overlay-hover);
}

.welcome-card-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.welcome-card-content h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.welcome-card-content p {
    font-size: 13px;
    color: var(--text-tertiary);
    line-height: 1.4;
}

.welcome-dismiss {
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--text-primary);
    color: var(--bg-primary);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.welcome-dismiss:hover {
    opacity: 0.85;
}