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

:root {
    --color-base-bg: #fafbfc;
    --color-base-surface: #ffffff;
    --color-base-text: #1a202c;
    --color-base-text-muted: #4a5568;
    --color-accent-1: #87634B;
    --color-accent-2: #6B4E3D;
    --color-accent-3: #A07856;
    --color-accent-light: #F5F0EB;
    --color-shadow: rgba(135, 99, 75, 0.15);
    --color-border: rgba(135, 99, 75, 0.12);
    --color-hover: rgba(135, 99, 75, 0.08);
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.06), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 24px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.06);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-base-text);
    background: linear-gradient(135deg, #fafbfc 0%, #f5f7fa 100%);
    min-height: 100vh;
}

/* Navigation */
.navigation {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(135, 99, 75, 0.1);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
    flex-wrap: wrap;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-accent-1);
    text-decoration: none;
    padding: var(--space-sm) var(--space-lg);
    background: linear-gradient(135deg, var(--color-accent-light) 0%, rgba(135, 99, 75, 0.1) 100%);
    border-radius: 9999px;
    letter-spacing: -0.02em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-brand:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(135, 99, 75, 0.2);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    align-items: center;
    flex-wrap: wrap;
}

.nav-menu a {
    text-decoration: none;
    color: var(--color-base-text);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--color-accent-1);
    background: var(--color-hover);
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-xl);
}

.search-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.search-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent-2);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

.search-header p {
    color: var(--color-base-text-muted);
    font-size: 1.1rem;
}

/* Search Box */
.search-container {
    margin-bottom: var(--space-3xl);
}

.search-box {
    position: relative;
    max-width: 700px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: var(--space-lg) var(--space-xl);
    padding-left: 3.5rem;
    font-size: 1.1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--color-base-surface);
    color: var(--color-base-text);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent-1);
    box-shadow: 0 0 0 3px rgba(135, 99, 75, 0.1), var(--shadow-md);
}

.search-icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-base-text-muted);
    font-size: 1.2rem;
}

.search-filters {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

.filter-btn {
    padding: var(--space-sm) var(--space-lg);
    border: 2px solid var(--color-border);
    background: var(--color-base-surface);
    color: var(--color-base-text);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn:hover {
    border-color: var(--color-accent-1);
    background: var(--color-hover);
}

.filter-btn.active {
    background: var(--color-accent-1);
    color: white;
    border-color: var(--color-accent-1);
}

/* Results */
.search-stats {
    text-align: center;
    color: var(--color-base-text-muted);
    margin-bottom: var(--space-xl);
    font-size: 1rem;
}

.results-container {
    display: grid;
    gap: var(--space-lg);
}

.result-card {
    background: var(--color-base-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
}

.result-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent-1);
}

.result-category {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--color-accent-light);
    color: var(--color-accent-2);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    text-transform: capitalize;
}

.result-title {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-accent-2);
    margin-bottom: var(--space-sm);
}

.result-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.result-title a:hover {
    color: var(--color-accent-1);
}

.result-excerpt {
    color: var(--color-base-text-muted);
    line-height: 1.7;
    margin-bottom: var(--space-md);
}

.result-excerpt mark {
    background: rgba(135, 99, 75, 0.2);
    color: var(--color-accent-2);
    padding: 0.1rem 0.2rem;
    border-radius: 2px;
    font-weight: 500;
}

.result-url {
    font-size: 0.9rem;
    color: var(--color-accent-1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.result-url:hover {
    text-decoration: underline;
}

.no-results {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-base-text-muted);
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: var(--space-lg);
    opacity: 0.3;
}

.no-results h2 {
    font-size: 1.5rem;
    color: var(--color-base-text);
    margin-bottom: var(--space-sm);
}

.loading {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-base-text-muted);
}

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-accent-1);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .search-header h1 {
        font-size: 2rem;
    }

    .search-input {
        font-size: 1rem;
        padding: var(--space-md) var(--space-lg);
        padding-left: 3rem;
    }

    .result-card {
        padding: var(--space-lg);
    }

    .result-title {
        font-size: 1.2rem;
    }
}