/* Loqlee Help Center — Design System */

:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #EEF2FF;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-tertiary: #F3F4F6;
    --border: #E5E7EB;
    --border-light: #F3F4F6;
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
    --max-width: 1200px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

body {
    font-family: var(--font);
    color: var(--text-primary);
    background: var(--bg-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ── Header ── */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}
.logo-icon {
    color: var(--primary);
    font-size: 1.4rem;
}
.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}
.nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
}
.nav a:hover { color: var(--text-primary); }
.nav-cta {
    background: var(--primary);
    color: #fff !important;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600 !important;
    transition: background 0.2s !important;
}
.nav-cta:hover { background: var(--primary-hover); }

/* ── Hero ── */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    padding: 64px 0 80px;
    text-align: center;
}
.hero h1 {
    color: #fff;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}
.hero-sub {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    margin-bottom: 36px;
}
.search-box {
    position: relative;
    max-width: 620px;
    margin: 0 auto;
}
.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--text-tertiary);
    pointer-events: none;
}
.search-box input {
    width: 100%;
    padding: 18px 20px 18px 52px;
    font-size: 1rem;
    font-family: var(--font);
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    background: #fff;
    outline: none;
    transition: box-shadow 0.2s;
}
.search-box input:focus {
    box-shadow: var(--shadow-xl), 0 0 0 3px rgba(79,70,229,0.2);
}
.search-box input::placeholder { color: var(--text-tertiary); }

/* Search Results Dropdown */
.search-results {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border);
    max-height: 400px;
    overflow-y: auto;
    text-align: left;
    z-index: 200;
}
.search-results.active { display: block; }
.search-result-item {
    display: block;
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-light);
    transition: background 0.15s;
}
.search-result-item:last-child { border-bottom: none; }
.search-result-item:hover { background: var(--bg-secondary); }
.search-result-item .result-cat {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.search-result-item .result-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 2px 0;
}
.search-result-item .result-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.search-no-results {
    padding: 24px 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ── Categories ── */
.categories {
    padding: 64px 0;
}
.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.category-card {
    display: flex;
    flex-direction: column;
    padding: 28px 24px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.2s;
    cursor: pointer;
}
.category-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.category-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}
.category-card h2 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-primary);
}
.category-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    flex: 1;
    line-height: 1.5;
}
.category-count {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

/* ── Popular Articles ── */
.popular {
    padding: 0 0 64px;
}
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 32px;
    letter-spacing: -0.01em;
}
.articles-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}
.article-item {
    display: block;
    padding: 24px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}
.article-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.article-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.article-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 6px 0;
    color: var(--text-primary);
}
.article-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ── Support CTA ── */
.support-cta {
    padding: 0 0 80px;
}
.support-box {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--primary-light) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    text-align: center;
}
.support-box h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}
.support-box > p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 32px;
}
.support-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font);
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary {
    background: #fff;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-secondary); }

/* ── Footer ── */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 48px 0 32px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand .logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}
.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 8px;
    line-height: 1.5;
}
.footer-links h4 {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}
.footer-links a {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 4px 0;
    transition: color 0.15s;
}
.footer-links a:hover { color: var(--text-primary); }
.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
}
.footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
    .categories-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .hero h1 { font-size: 1.75rem; }
    .hero-sub { font-size: 0.95rem; }
    .hero { padding: 48px 0 56px; }
    .categories { padding: 48px 0; }
    .categories-grid { grid-template-columns: 1fr; }
    .articles-list { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .support-box { padding: 40px 24px; }
    .support-box h2 { font-size: 1.35rem; }
    .nav { gap: 16px; }
}
@media (max-width: 480px) {
    .nav a:not(.nav-cta) { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .container { padding: 0 16px; }
}