/* ===== Design Tokens — Light Mode ===== */
:root,
[data-theme="light"] {
    --bg-primary: #f5f3ef;
    --bg-secondary: #ece9e3;
    --bg-card: rgba(255, 255, 255, 0.45);
    --bg-card-hover: rgba(255, 255, 255, 0.65);
    --bg-glass: rgba(255, 255, 255, 0.4);
    --border-glass: rgba(255, 255, 255, 0.6);
    --border-glass-subtle: rgba(0, 0, 0, 0.06);
    --border-active: rgba(120, 90, 200, 0.4);
    --card-sheen: rgba(255, 255, 255, 0.7);
    --card-shadow-base: rgba(0, 0, 0, 0.04);

    --text-primary: #1e1b2e;
    --text-secondary: #55506a;
    --text-muted: #8a8599;

    --accent-purple: #7c5cbf;
    --accent-blue: #3b82f6;
    --accent-pink: #e04e95;
    --accent-green: #16a06a;
    --accent-yellow: #d9940f;
    --accent-red: #e04545;
    --accent-indigo: #6366f1;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 30px rgba(120, 90, 200, 0.1);

    --orb-1: rgba(160, 120, 240, 0.3);
    --orb-2: rgba(100, 180, 255, 0.25);
    --orb-3: rgba(240, 130, 180, 0.2);

    --prompt-bg: rgba(240, 237, 232, 0.6);
    --footer-border: rgba(0, 0, 0, 0.06);
    --scrollbar-thumb: rgba(0, 0, 0, 0.12);
    --tag-bg: rgba(0, 0, 0, 0.04);
    --tag-border: rgba(0, 0, 0, 0.05);
    --search-clear-bg: rgba(0, 0, 0, 0.06);
    --search-clear-hover: rgba(0, 0, 0, 0.1);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-med: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Design Tokens — Dark Mode ===== */
[data-theme="dark"] {
    --bg-primary: #0f0e17;
    --bg-secondary: #1a1828;
    --bg-card: rgba(255, 255, 255, 0.05);
    --bg-card-hover: rgba(255, 255, 255, 0.09);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --border-glass: rgba(255, 255, 255, 0.1);
    --border-glass-subtle: rgba(255, 255, 255, 0.06);
    --border-active: rgba(160, 130, 240, 0.5);
    --card-sheen: rgba(255, 255, 255, 0.12);
    --card-shadow-base: rgba(0, 0, 0, 0.3);

    --text-primary: #fffffe;
    --text-secondary: #a7a9be;
    --text-muted: #6b6d82;

    --accent-purple: #a78bfa;
    --accent-blue: #60a5fa;
    --accent-pink: #f472b6;
    --accent-green: #34d399;
    --accent-yellow: #fbbf24;
    --accent-red: #f87171;
    --accent-indigo: #818cf8;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(160, 130, 240, 0.15);

    --orb-1: rgba(130, 90, 220, 0.25);
    --orb-2: rgba(60, 180, 220, 0.2);
    --orb-3: rgba(220, 80, 160, 0.18);

    --prompt-bg: rgba(255, 255, 255, 0.04);
    --footer-border: rgba(255, 255, 255, 0.06);
    --scrollbar-thumb: rgba(255, 255, 255, 0.12);
    --tag-bg: rgba(255, 255, 255, 0.06);
    --tag-border: rgba(255, 255, 255, 0.08);
    --search-clear-bg: rgba(255, 255, 255, 0.08);
    --search-clear-hover: rgba(255, 255, 255, 0.15);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    transition: background 0.4s ease, color 0.3s ease;
}

/* ===== Ambient Background ===== */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 20% 50%, var(--orb-1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, var(--orb-2) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, var(--orb-3) 0%, transparent 50%);
    z-index: -1;
    animation: ambientShift 20s ease-in-out infinite alternate;
    transition: background 0.6s ease;
}

@keyframes ambientShift {
    0% {
        transform: translate(0, 0) rotate(0deg);
    }

    100% {
        transform: translate(-3%, 2%) rotate(3deg);
    }
}

/* ===== Container ===== */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.header {
    padding: 48px 0 32px;
    text-align: center;
    position: relative;
}

.header-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.header-logo {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 16px rgba(120, 90, 200, 0.2);
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.header-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== Theme Toggle ===== */
.theme-toggle {
    position: absolute;
    top: 48px;
    right: 0;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-med);
    box-shadow: var(--shadow-sm);
    z-index: 10;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
    background: var(--bg-card-hover);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-icon {
    font-size: 20px;
    line-height: 1;
    transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.theme-toggle:hover .theme-icon {
    transform: rotate(30deg);
}

/* ===== Search Bar ===== */
.search-wrapper {
    max-width: 520px;
    margin: 24px auto 0;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 18px;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 14px 18px 14px 50px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    color: var(--text-primary);
    font-size: 15px;
    font-family: var(--font-sans);
    outline: none;
    transition: all var(--transition-fast);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

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

.search-input:focus {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 3px rgba(120, 90, 200, 0.12);
    background: var(--bg-card-hover);
}

.search-clear {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--search-clear-bg);
    border: none;
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    display: none;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.search-clear.visible {
    display: flex;
}

.search-clear:hover {
    background: var(--search-clear-hover);
    color: var(--text-primary);
}

/* ===== Category Tabs ===== */
.categories {
    display: flex;
    gap: 8px;
    padding: 28px 0 24px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    justify-content: center;
    flex-wrap: wrap;
}

.categories::-webkit-scrollbar {
    display: none;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    font-size: 14px;
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    user-select: none;
}

.category-tab:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.category-tab.active {
    background: rgba(120, 90, 200, 0.1);
    border-color: var(--border-active);
    color: var(--text-primary);
    box-shadow: 0 4px 16px rgba(120, 90, 200, 0.08);
}

[data-theme="dark"] .category-tab.active {
    background: rgba(167, 139, 250, 0.12);
}

.category-tab .tab-icon {
    font-size: 16px;
}

.category-tab .tab-count {
    background: var(--tag-bg);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 600;
}

.category-tab.active .tab-count {
    background: rgba(120, 90, 200, 0.15);
    color: var(--accent-purple);
}

/* ===== Preset Grid ===== */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
    padding-bottom: 60px;
}

/* ===== Preset Card ===== */
.preset-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-top: 1px solid var(--card-sheen);
    border-radius: var(--radius-lg);
    padding: 24px;
    cursor: pointer;
    transition: all var(--transition-med);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 4px 16px var(--card-shadow-base);
}

.preset-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--card-accent, var(--accent-purple)), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.preset-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-glass);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md), 0 0 0 1px var(--border-glass);
}

.preset-card:hover::before {
    opacity: 1;
}

.preset-card.expanded {
    background: var(--bg-card-hover);
    border-color: var(--border-active);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.preset-card.expanded::before {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.card-category-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--card-accent, var(--accent-purple));
    opacity: 0.8;
    margin-bottom: 8px;
}

.card-title {
    font-size: 18px;
    font-weight: 650;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 8px;
}

.card-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 0;
}

.tag {
    padding: 4px 10px;
    background: var(--tag-bg);
    border: 1px solid var(--tag-border);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.preset-card:hover .tag {
    background: rgba(0, 0, 0, 0.06);
    color: var(--text-secondary);
}

/* ===== Expanded Prompt Area ===== */
.card-prompt-area {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
        margin-top 0.3s ease,
        opacity 0.3s ease;
    opacity: 0;
}

.preset-card.expanded .card-prompt-area {
    max-height: 600px;
    margin-top: 20px;
    opacity: 1;
    overflow-y: auto;
}

.prompt-container {
    background: var(--prompt-bg);
    border: 1px solid var(--border-glass-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
}

.prompt-text {
    font-size: 13px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-word;
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

.copy-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-top: 14px;
    padding: 12px 20px;
    background: linear-gradient(135deg, rgba(120, 90, 200, 0.1), rgba(99, 102, 241, 0.1));
    border: 1px solid rgba(120, 90, 200, 0.2);
    border-radius: var(--radius-md);
    color: var(--accent-purple);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: linear-gradient(135deg, rgba(120, 90, 200, 0.18), rgba(99, 102, 241, 0.18));
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(120, 90, 200, 0.12);
}

.copy-btn:active {
    transform: translateY(0);
}

.copy-btn.copied {
    background: linear-gradient(135deg, rgba(22, 160, 106, 0.1), rgba(22, 160, 106, 0.15));
    border-color: rgba(22, 160, 106, 0.3);
    color: var(--accent-green);
}

/* ===== Open in NotebookLM Button ===== */
.open-nlm-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-top: 8px;
    padding: 12px 20px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    color: var(--accent-blue);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.open-nlm-btn:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.18), rgba(16, 185, 129, 0.18));
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.12);
}

.open-nlm-btn:active {
    transform: translateY(0);
}

.open-nlm-btn.launched {
    background: linear-gradient(135deg, rgba(22, 160, 106, 0.1), rgba(22, 160, 106, 0.15));
    border-color: rgba(22, 160, 106, 0.3);
    color: var(--accent-green);
}

/* ===== Expand Indicator ===== */
.expand-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 14px;
    color: var(--text-muted);
    font-size: 12px;
    gap: 6px;
    transition: color var(--transition-fast);
}

.preset-card:hover .expand-indicator {
    color: var(--text-secondary);
}

.expand-arrow {
    transition: transform var(--transition-med);
    font-size: 10px;
}

.preset-card.expanded .expand-arrow {
    transform: rotate(180deg);
}

/* ===== Toast ===== */
.toast-container {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    pointer-events: none;
}

.toast {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(22, 160, 106, 0.3);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--accent-green);
    padding: 14px 28px;
    border-radius: var(--radius-xl);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    transition: all var(--transition-med);
    pointer-events: none;
    white-space: nowrap;
}

.toast.show {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
}

/* ===== Mix Mode Toggle ===== */
.mix-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 14px;
    padding: 10px 22px;
    background: var(--bg-glass);
    border: 1.5px solid var(--border-glass);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-med);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.mix-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.6);
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(120, 90, 200, 0.15);
}

.mix-toggle-btn.active {
    background: linear-gradient(135deg, rgba(120, 90, 200, 0.15), rgba(200, 80, 160, 0.1));
    border-color: var(--accent-purple);
    color: var(--accent-purple);
    box-shadow: 0 4px 16px rgba(120, 90, 200, 0.2);
}

.mix-toggle-icon {
    font-size: 16px;
    transition: transform var(--transition-med);
}

.mix-toggle-btn.active .mix-toggle-icon {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {

    0%,
    100% {
        transform: rotate(0deg);
    }

    25% {
        transform: rotate(-10deg);
    }

    75% {
        transform: rotate(10deg);
    }
}

/* ===== Selectable Card (Mix Mode) ===== */
.preset-card.selectable {
    cursor: pointer;
    position: relative;
}

.preset-card.selectable::after {
    content: '';
    position: absolute;
    top: 16px;
    right: 16px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--border-glass);
    background: rgba(255, 255, 255, 0.6);
    transition: all var(--transition-fast);
    z-index: 2;
}

.preset-card.selectable:hover::after {
    border-color: var(--accent-purple);
    background: rgba(120, 90, 200, 0.08);
}

.preset-card.selected::after {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    border-color: var(--accent-purple);
    box-shadow: 0 2px 8px rgba(120, 90, 200, 0.3);
}

.preset-card.selected {
    border-color: var(--accent-purple);
    box-shadow: 0 0 0 2px rgba(120, 90, 200, 0.15), var(--shadow-md);
    background: rgba(255, 255, 255, 0.7);
}

.preset-card.selected .card-category-badge {
    color: var(--accent-purple);
    opacity: 1;
}

/* ===== Selection Order Badge ===== */
.selection-order {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    color: white;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
    box-shadow: 0 2px 8px rgba(120, 90, 200, 0.3);
    animation: popIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes popIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* ===== Floating Mix Bar ===== */
.mix-bar {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 999;
    transition: bottom 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

.mix-bar.visible {
    bottom: 28px;
    pointer-events: auto;
}

.mix-bar-inner {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 24px;
    background: rgba(30, 25, 45, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.mix-bar-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mix-bar-count {
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}

.mix-bar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mix-bar-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-lg);
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.mix-copy-btn {
    background: linear-gradient(135deg, rgba(120, 90, 200, 0.9), rgba(200, 80, 160, 0.9));
    color: white;
    border-color: rgba(255, 255, 255, 0.2);
}

.mix-copy-btn:hover {
    background: linear-gradient(135deg, rgba(130, 100, 210, 1), rgba(210, 90, 170, 1));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(120, 90, 200, 0.4);
}

.mix-nlm-btn {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
}

.mix-nlm-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-1px);
}

.mix-clear-btn {
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.6);
    padding: 9px 12px;
    font-size: 14px;
}

.mix-clear-btn:hover {
    background: rgba(255, 80, 80, 0.2);
    color: rgba(255, 120, 120, 1);
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 32px 0 40px;
    color: var(--text-muted);
    font-size: 13px;
    border-top: 1px solid var(--footer-border);
}

.footer a {
    color: var(--accent-purple);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer a:hover {
    color: var(--accent-pink);
}

/* ===== Prompt Area Scrollbar ===== */
.card-prompt-area::-webkit-scrollbar {
    width: 4px;
}

.card-prompt-area::-webkit-scrollbar-track {
    background: transparent;
}

.card-prompt-area::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .header {
        padding: 32px 0 24px;
    }

    .header h1 {
        font-size: 22px;
    }

    .header-subtitle {
        font-size: 13px;
    }

    .categories {
        justify-content: flex-start;
        padding: 20px 0 16px;
        flex-wrap: nowrap;
    }

    .category-tab {
        padding: 8px 14px;
        font-size: 13px;
    }

    .preset-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .preset-card {
        padding: 20px;
    }

    .card-title {
        font-size: 16px;
    }

    .app-container {
        padding: 0 16px;
    }
}

@media (max-width: 480px) {
    .header-brand {
        gap: 8px;
    }

    .header-logo {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .header h1 {
        font-size: 19px;
    }

    .search-input {
        padding: 12px 16px 12px 44px;
        font-size: 14px;
    }

    .category-tab .tab-label {
        display: none;
    }

    .category-tab .tab-icon {
        font-size: 18px;
    }

    .category-tab {
        padding: 10px 14px;
    }
}

/* ===== Animations ===== */
@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.preset-card {
    animation: cardFadeIn 0.4s ease-out both;
}

.preset-card:nth-child(1) {
    animation-delay: 0.02s;
}

.preset-card:nth-child(2) {
    animation-delay: 0.05s;
}

.preset-card:nth-child(3) {
    animation-delay: 0.08s;
}

.preset-card:nth-child(4) {
    animation-delay: 0.11s;
}

.preset-card:nth-child(5) {
    animation-delay: 0.14s;
}

.preset-card:nth-child(6) {
    animation-delay: 0.17s;
}

.preset-card:nth-child(7) {
    animation-delay: 0.20s;
}

.preset-card:nth-child(8) {
    animation-delay: 0.23s;
}

.preset-card:nth-child(9) {
    animation-delay: 0.26s;
}

.preset-card:nth-child(10) {
    animation-delay: 0.29s;
}

/* ===== Custom Tooltips ===== */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    padding: 8px 14px;
    background: rgba(30, 25, 45, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: rgba(255, 255, 255, 0.95);
    font-size: 12px;
    font-weight: 500;
    line-height: 1.5;
    white-space: nowrap;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 1001;
    font-family: var(--font-sans);
}

[data-tooltip]::after {
    content: '';
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: rgba(30, 25, 45, 0.92);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 1001;
}

[data-tooltip]:hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

[data-tooltip]:hover::after {
    opacity: 1;
}

/* Mix bar tooltips: show ABOVE the bar */
.mix-bar-btn[data-tooltip]::before {
    bottom: calc(100% + 12px);
}

.mix-bar-btn[data-tooltip]::after {
    bottom: calc(100% + 6px);
}

/* Hide tooltips on mobile (touch devices) */
@media (max-width: 768px) {

    [data-tooltip]::before,
    [data-tooltip]::after {
        display: none;
    }
}

/* ===== Page Navigation Tabs ===== */
.page-nav {
    display: flex;
    justify-content: center;
    gap: 6px;
    padding: 12px 16px 4px;
    max-width: 500px;
    margin: 0 auto;
}

.page-nav-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass-subtle);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.page-nav-tab:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
    border-color: var(--border-glass);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.page-nav-tab.active {
    color: var(--text-primary);
    background: var(--bg-card-hover);
    border-color: var(--accent-purple);
    box-shadow: 0 0 20px rgba(120, 90, 200, 0.15), var(--shadow-sm);
    font-weight: 600;
}

.page-nav-icon {
    font-size: 16px;
}

.page-nav-label {
    white-space: nowrap;
}

@media (max-width: 480px) {
    .page-nav {
        gap: 4px;
        padding: 8px 12px 0;
    }

    .page-nav-tab {
        padding: 8px 14px;
        font-size: 12px;
        gap: 6px;
    }

    .page-nav-icon {
        font-size: 14px;
    }
}

/* ===== Sample Keywords (Image Presets) ===== */
.sample-keywords {
    margin: 12px 0 16px;
    padding: 12px 14px;
    background: var(--tag-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--tag-border);
}

.keywords-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.keywords-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.keyword-chip {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-purple);
    background: rgba(120, 90, 200, 0.08);
    border: 1px solid rgba(120, 90, 200, 0.15);
    border-radius: 20px;
    transition: all var(--transition-fast);
    cursor: default;
}

.keyword-chip:hover {
    background: rgba(120, 90, 200, 0.14);
    border-color: rgba(120, 90, 200, 0.3);
}

/* Gemini button variant */
.open-gemini-btn {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.08), rgba(234, 67, 53, 0.06)) !important;
    border-color: rgba(66, 133, 244, 0.2) !important;
}

.open-gemini-btn:hover {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.14), rgba(234, 67, 53, 0.1)) !important;
    border-color: rgba(66, 133, 244, 0.35) !important;
}