/* ==========================================================================
   Luxuse Patent Intelligence Platform Design System
   Editorial Elegance: Warm Cream, Hunter Green (#1F4D3A), Warm Gold (#A8823A)
   ========================================================================== */

:root {
    /* Color Palette */
    --bg-base: #FDFBF7;
    --bg-surface: #FFFFFF;
    --bg-surface-elevated: #F5F0E6;
    --bg-card: #FFFFFF;
    --bg-card-hover: #FAF8F2;
    --bg-card-dark: #163828;
    --bg-modal: #FFFFFF;

    /* Borders & Dividers */
    --border-subtle: #EBE5D8;
    --border-card: #E3DCCB;
    --border-focus: #1F4D3A;

    /* Brand Colors */
    --brand-primary: #1F4D3A;
    --brand-primary-light: #2D6A4F;
    --brand-secondary: #163828;
    --brand-accent: #A8823A;
    --brand-accent-light: #C5A059;
    --brand-gradient: linear-gradient(135deg, #1F4D3A 0%, #2D6A4F 100%);
    --gold-gradient: linear-gradient(135deg, #A8823A 0%, #C5A059 100%);

    /* Semantic Status */
    --success: #1F4D3A;
    --success-bg: rgba(31, 77, 58, 0.08);
    --warning: #B45309;
    --warning-bg: rgba(180, 83, 9, 0.08);
    --danger: #9B2C2C;
    --danger-bg: rgba(155, 44, 44, 0.08);
    --info: #2C5282;
    --info-bg: rgba(44, 82, 130, 0.08);

    /* Text */
    --text-main: #1A1A1A;
    --text-muted: #524E48;
    --text-dim: #8A857B;
    --text-inverse: #FFFFFF;

    /* Typography */
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(31, 77, 58, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 12px rgba(31, 77, 58, 0.06), 0 2px 4px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 12px 28px rgba(31, 77, 58, 0.08), 0 4px 10px rgba(0, 0, 0, 0.04);
    --shadow-gold: 0 4px 14px rgba(168, 130, 58, 0.2);

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    font-size: 15px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--brand-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

h1, h2, h3, h4, .serif-heading {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.25;
    color: var(--brand-secondary);
}

/* Top Navigation Bar */
.navbar {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-card);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: var(--brand-gradient);
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FDFBF7;
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.brand-title {
    font-family: var(--font-serif);
    font-size: 21px;
    font-weight: 700;
    color: var(--brand-secondary);
    letter-spacing: -0.02em;
}

.brand-subtitle {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--brand-accent);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.nav-link {
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    color: var(--brand-primary);
    background-color: var(--bg-surface-elevated);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--brand-gradient);
    color: #FFFFFF;
    box-shadow: 0 2px 4px rgba(31, 77, 58, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #163828 0%, #1F4D3A 100%);
    color: #FFFFFF;
    box-shadow: 0 4px 8px rgba(31, 77, 58, 0.28);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-card);
    color: var(--brand-primary);
}

.btn-outline:hover {
    border-color: var(--brand-primary);
    background: var(--bg-surface-elevated);
}

.btn-gold {
    background: var(--gold-gradient);
    color: #FFFFFF;
    box-shadow: var(--shadow-gold);
}

.btn-gold:hover {
    background: linear-gradient(135deg, #937130 0%, #A8823A 100%);
    color: #FFFFFF;
    transform: translateY(-1px);
}

.btn-sm {
    padding: 5px 11px;
    font-size: 13px;
    border-radius: var(--radius-sm);
}

/* Main Container */
.main-wrapper {
    flex: 1;
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 32px 24px;
}

/* Cards & Panels */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-subtle);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-subtle);
}

.card-title {
    font-size: 18px;
    font-family: var(--font-serif);
    color: var(--brand-secondary);
}

/* KPI Stat Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    padding: 20px 22px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--brand-primary);
}

.stat-card.stat-gold::before {
    background: var(--brand-accent);
}

.stat-card.stat-info::before {
    background: var(--info);
}

.stat-card.stat-warning::before {
    background: var(--warning);
}

.stat-label {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-dim);
    margin-bottom: 6px;
}

.stat-value {
    font-family: var(--font-serif);
    font-size: 32px;
    font-weight: 700;
    color: var(--brand-secondary);
    line-height: 1.1;
}

.stat-meta {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
}

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    background: var(--bg-surface);
}

table.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 14px;
}

table.data-table th {
    background-color: var(--bg-surface-elevated);
    color: var(--brand-secondary);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-card);
}

table.data-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-main);
    vertical-align: middle;
}

table.data-table tr:hover td {
    background-color: var(--bg-card-hover);
}

/* Badges & Tags */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.badge-active {
    background: rgba(31, 77, 58, 0.12);
    color: var(--brand-primary);
    border: 1px solid rgba(31, 77, 58, 0.25);
}

.badge-pending {
    background: rgba(180, 83, 9, 0.12);
    color: var(--warning);
    border: 1px solid rgba(180, 83, 9, 0.25);
}

.badge-expired {
    background: rgba(138, 133, 123, 0.15);
    color: var(--text-dim);
    border: 1px solid rgba(138, 133, 123, 0.3);
}

.badge-overdue {
    background: rgba(155, 44, 44, 0.12);
    color: var(--danger);
    border: 1px solid rgba(155, 44, 44, 0.25);
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px 9px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-card);
    color: var(--brand-secondary);
}

.tag-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 18px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--brand-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-card);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 14px;
    background: var(--bg-surface);
    color: var(--text-main);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(31, 77, 58, 0.12);
}

/* Search Bar Component */
.search-hero {
    position: relative;
    max-width: 720px;
    width: 100%;
    margin: 0 auto;
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-input {
    width: 100%;
    padding: 16px 20px 16px 52px;
    font-size: 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-card);
    background: var(--bg-surface);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-lg), 0 0 0 3px rgba(31, 77, 58, 0.12);
}

.search-icon-left {
    position: absolute;
    left: 18px;
    color: var(--brand-primary);
    width: 22px;
    height: 22px;
    pointer-events: none;
}

.search-btn-right {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
}

.autocomplete-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border: 1px solid var(--border-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 50;
    max-height: 380px;
    overflow-y: auto;
    display: none;
}

.autocomplete-item {
    padding: 12px 18px;
    border-bottom: 1px solid var(--border-subtle);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 3px;
    transition: var(--transition);
}

.autocomplete-item:hover {
    background: var(--bg-card-hover);
}

.autocomplete-item-num {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 13px;
    color: var(--brand-primary);
}

.autocomplete-item-title {
    font-size: 14px;
    color: var(--text-main);
}

/* Flash Messages */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid rgba(31, 77, 58, 0.25);
    color: var(--success);
}

.alert-error, .alert-danger {
    background: var(--danger-bg);
    border: 1px solid rgba(155, 44, 44, 0.25);
    color: var(--danger);
}

.alert-warning {
    background: var(--warning-bg);
    border: 1px solid rgba(180, 83, 9, 0.25);
    color: var(--warning);
}

.alert-info {
    background: var(--info-bg);
    border: 1px solid rgba(44, 82, 130, 0.25);
    color: var(--info);
}

/* Footer */
.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-card);
    padding: 32px 24px;
    margin-top: auto;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    font-size: 13px;
    color: var(--text-dim);
}

.footer-notice {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--brand-secondary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .stats-grid {
        grid-template-columns: 1fr;
    }
    .main-wrapper {
        padding: 20px 16px;
    }
}