:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #c9a962;
    --text-primary: #1a1a2e;
    --text-secondary: #4a4a5a;
    --text-light: #8a8a9a;
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --card-bg: rgba(255, 255, 255, 0.85);
    --border: rgba(201, 169, 98, 0.2);
    --shadow: 0 10px 40px rgba(26, 26, 46, 0.08);
}

.dark-mode {
    --primary: #e8e8e8;
    --secondary: #c9a962;
    --accent: #c9a962;
    --text-primary: #e8e8e8;
    --text-secondary: #b8b8c8;
    --text-light: #787888;
    --bg-primary: #0f0f1a;
    --bg-secondary: #161625;
    --card-bg: rgba(22, 22, 37, 0.9);
    --border: rgba(201, 169, 98, 0.3);
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    min-height: 100vh;
    transition: background 0.4s ease, color 0.4s ease;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(201, 169, 98, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(201, 169, 98, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 60px 24px;
    position: relative;
    z-index: 1;
}

.header {
    text-align: center;
    margin-bottom: 56px;
    position: relative;
}

.title {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: 8px;
    position: relative;
    display: inline-block;
}

.title::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.subtitle {
    font-size: 1rem;
    color: var(--text-light);
    letter-spacing: 4px;
    font-weight: 300;
    margin-top: 24px;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.theme-toggle:hover {
    transform: rotate(15deg);
    border-color: var(--accent);
}

.theme-toggle .icon {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    transition: opacity 0.3s ease;
}

.theme-toggle .sun {
    opacity: 1;
}

.theme-toggle .moon {
    opacity: 0;
    position: absolute;
}

.dark-mode .theme-toggle .sun {
    opacity: 0;
}

.dark-mode .theme-toggle .moon {
    opacity: 1;
}

.search-box {
    display: flex;
    gap: 12px;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.search-input {
    flex: 1;
    padding: 16px 24px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
    font-family: inherit;
}

.search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(201, 169, 98, 0.15);
}

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

.search-btn {
    width: 56px;
    height: 56px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.search-btn:hover {
    border-color: var(--accent);
    background: var(--accent);
}

.search-btn:hover svg {
    color: var(--bg-secondary);
}

.search-btn svg {
    width: 22px;
    height: 22px;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.category-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 40px;
}

.category-btn {
    padding: 12px 28px;
    border: 1px solid var(--border);
    border-radius: 50px;
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    letter-spacing: 1px;
}

.category-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.category-btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--bg-secondary);
}

.action-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 48px;
}

.action-btn {
    padding: 16px 40px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s ease;
    font-family: inherit;
    letter-spacing: 1px;
}

.action-btn.primary {
    background: linear-gradient(135deg, var(--accent) 0%, #d4b878 100%);
    color: var(--bg-secondary);
    box-shadow: 0 8px 24px rgba(201, 169, 98, 0.35);
}

.action-btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(201, 169, 98, 0.45);
}

.action-btn svg {
    width: 20px;
    height: 20px;
}

.quote-container {
    display: grid;
    gap: 24px;
}

.quote-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 40px;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.quote-card::before {
    content: '"';
    position: absolute;
    top: 20px;
    left: 32px;
    font-family: 'Noto Serif SC', serif;
    font-size: 120px;
    color: var(--accent);
    opacity: 0.1;
    line-height: 1;
    pointer-events: none;
}

.quote-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.quote-category {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(201, 169, 98, 0.12);
    color: var(--accent);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 50px;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.quote-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.4rem;
    line-height: 2;
    color: var(--text-primary);
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.quote-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.copy-btn {
    padding: 10px 24px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.copy-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(201, 169, 98, 0.1);
}

.copy-btn svg {
    width: 18px;
    height: 18px;
}

.footer {
    text-align: center;
    margin-top: 80px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

.footer p {
    color: var(--text-light);
    font-size: 0.9rem;
    letter-spacing: 2px;
}

.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary);
    padding: 16px 32px;
    border-radius: 50px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    font-weight: 500;
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

@media (max-width: 768px) {
    .container {
        padding: 40px 16px;
    }

    .title {
        font-size: 2rem;
        letter-spacing: 4px;
    }

    .theme-toggle {
        position: relative;
        margin: 24px auto 0;
        right: auto;
    }

    .header {
        margin-bottom: 40px;
    }

    .category-nav {
        gap: 8px;
    }

    .category-btn {
        padding: 10px 20px;
        font-size: 0.85rem;
    }

    .quote-card {
        padding: 32px 24px;
    }

    .quote-text {
        font-size: 1.2rem;
        line-height: 1.9;
    }

    .quote-card::before {
        font-size: 80px;
        top: 16px;
        left: 20px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.6rem;
        letter-spacing: 2px;
    }

    .category-nav {
        justify-content: flex-start;
    }

    .action-btn {
        padding: 14px 32px;
        font-size: 0.95rem;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.quote-card {
    animation: fadeInUp 0.5s ease forwards;
}

.quote-card:nth-child(1) { animation-delay: 0.05s; }
.quote-card:nth-child(2) { animation-delay: 0.1s; }
.quote-card:nth-child(3) { animation-delay: 0.15s; }
.quote-card:nth-child(4) { animation-delay: 0.2s; }
.quote-card:nth-child(5) { animation-delay: 0.25s; }
.quote-card:nth-child(6) { animation-delay: 0.3s; }