/* ============================================================
   ĐĂNG KHOA AUTO – Design System & Full CSS
   Light Theme · Premium SaaS · Glassmorphism
   Color Palette:
     Background: #FFFFFF · #F8FAFC · #F1F5F9
     Primary:    #2563EB
     Accent:     #06B6D4
     Text:       #0F172A · #334155
     Border:     #E2E8F0
============================================================ */

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

:root {
    --bg:       #FFFFFF;
    --bg-2:     #F8FAFC;
    --bg-3:     #F1F5F9;
    --primary:  #2563EB;
    --primary-d:#1D4ED8;
    --primary-l:#EFF6FF;
    --accent:   #06B6D4;
    --accent-l: #ECFEFF;
    --text-1:   #0F172A;
    --text-2:   #334155;
    --text-3:   #64748B;
    --border:   #E2E8F0;
    --radius:   12px;
    --radius-sm:8px;
    --radius-lg:20px;
    --shadow-sm:0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
    --shadow:   0 4px 16px rgba(37,99,235,.10), 0 1px 4px rgba(0,0,0,.06);
    --shadow-lg:0 20px 60px rgba(37,99,235,.14), 0 4px 16px rgba(0,0,0,.08);
    --transition: .25s cubic-bezier(.4,0,.2,1);
    --font: 'Inter', system-ui, -apple-system, sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font);
    color: var(--text-1);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ─── Utilities ─────────────────────────────────────────── */
.container  { max-width: 1200px; margin: 0 auto; }
.mx-auto    { margin-left: auto; margin-right: auto; }
.px-4       { padding-left: 1rem; padding-right: 1rem; }
.mt-2       { margin-top: 0.5rem; }
.mt-4       { margin-top: 1rem; }
.mt-6       { margin-top: 1.5rem; }
.mt-8       { margin-top: 2rem; }
.text-center{ text-align: center; }
.text-sm    { font-size: .875rem; }
.text-lg    { font-size: 1.125rem; }
.flex       { display: flex; }
.flex-wrap  { flex-wrap: wrap; }
.gap-4      { gap: 1rem; }
.items-center{ align-items: center; }
.justify-center{ justify-content: center; }
.max-w-2xl  { max-width: 42rem; }

/* ─── Gradient Text ─────────────────────────────────────── */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ─── Buttons ───────────────────────────────────────────── */
.btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--primary), #1D4ED8);
    color: white; padding: 10px 22px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: .9rem; text-decoration: none;
    border: none; cursor: pointer;
    box-shadow: 0 4px 14px rgba(37,99,235,.35);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,.45);
    background: linear-gradient(135deg, #1D4ED8, #1e3a8a);
}
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
    display: inline-flex; align-items: center; gap: 8px;
    background: white; color: var(--primary);
    border: 2px solid var(--primary); padding: 10px 22px;
    border-radius: var(--radius-sm); font-weight: 600; font-size: .9rem;
    text-decoration: none; cursor: pointer;
    transition: all var(--transition);
}
.btn-secondary:hover { background: var(--primary-l); }

.btn-ghost {
    display: inline-flex; align-items: center; gap: 8px;
    background: transparent; color: var(--text-2);
    border: 2px solid var(--border); padding: 10px 22px;
    border-radius: var(--radius-sm); font-weight: 500; font-size: .9rem;
    text-decoration: none; cursor: pointer;
    transition: all var(--transition);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.btn-xl { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius); }

.btn-nav-login {
    background: var(--primary); color: white;
    padding: 8px 20px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: .875rem; text-decoration: none;
    transition: all var(--transition);
}
.btn-nav-login:hover { background: var(--primary-d); }

/* ─── NAVBAR ─────────────────────────────────────────────── */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(255,255,255,.85);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
}
.navbar.scrolled {
    box-shadow: var(--shadow);
    background: rgba(255,255,255,.95);
}
.navbar nav { height: 64px; }

.navbar-brand {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: var(--text-1);
}
.logo-text { font-weight: 700; font-size: 1rem; letter-spacing: -.02em; }
.logo-icon  { display: flex; }

.nav-links {
    display: flex; list-style: none; gap: 2px;
    align-items: center;
}
@media (max-width: 768px) { .nav-links { display: none; } }

.nav-link {
    display: block; padding: 6px 12px; border-radius: 6px;
    color: var(--text-2); font-weight: 500; font-size: .875rem;
    text-decoration: none; transition: all var(--transition);
}
.nav-link:hover { color: var(--primary); background: var(--primary-l); }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.mobile-menu-btn {
    display: none; background: none; border: none; cursor: pointer;
    color: var(--text-2); padding: 6px;
}
@media (max-width: 768px) { .mobile-menu-btn { display: flex; } }

[hidden] { display: none !important; }

.mobile-menu {
    display: none !important;
}
@media (max-width: 768px) {
    .mobile-menu:not([hidden]) {
        display: flex !important;
        background: white; border-top: 1px solid var(--border);
        padding: 16px; flex-direction: column; gap: 4px;
    }
}
.mobile-menu a {
    padding: 10px 12px; border-radius: var(--radius-sm);
    color: var(--text-2); font-weight: 500; text-decoration: none;
    transition: all var(--transition);
}
.mobile-menu a:hover { background: var(--bg-2); color: var(--primary); }

/* ─── HERO ───────────────────────────────────────────────── */
.hero-section {
    position: relative; min-height: 100vh;
    display: flex; align-items: center;
    padding-top: 80px;
    background: linear-gradient(160deg, #F8FAFC 0%, #EFF6FF 40%, #ECFEFF 100%);
    overflow: hidden;
}

.hero-3d-container {
    position: absolute; inset: 0; z-index: 0;
    pointer-events: none;
}
#hero-canvas { width: 100%; height: 100%; }

.hero-content {
    position: relative; z-index: 1;
    max-width: 720px; padding: 80px 1rem;
}

.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(37,99,235,.08); border: 1px solid rgba(37,99,235,.2);
    border-radius: 99px; padding: 6px 16px;
    font-size: .8rem; font-weight: 600; color: var(--primary);
    margin-bottom: 24px;
}
.badge-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--accent);
    animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50%       { transform: scale(1.4); opacity: .7; }
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900; line-height: 1.1;
    letter-spacing: -.03em; margin-bottom: 20px;
    color: var(--text-1);
}
.hero-subtitle-typed {
    font-size: clamp(1.4rem, 3.5vw, 2.4rem);
    font-weight: 600; color: var(--text-2);
    min-height: 1.2em; display: inline-block;
}

.hero-description {
    color: var(--text-2); font-size: 1.1rem; line-height: 1.7;
    margin-bottom: 32px; max-width: 580px;
}

.hero-actions {
    display: flex; flex-wrap: wrap; gap: 12px;
    margin-bottom: 48px; align-items: center;
}

/* Hero Stats */
.hero-stats {
    display: flex; flex-wrap: wrap; gap: 24px;
}
.stat-item {
    display: flex; align-items: center; gap: 12px;
    background: rgba(255,255,255,.7);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border);
    border-radius: var(--radius); padding: 12px 16px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition);
}
.stat-item:hover { transform: translateY(-2px); }
.stat-icon {
    width: 36px; height: 36px; border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
}
.stat-green  { background: #DCFCE7; }
.stat-blue   { background: #DBEAFE; }
.stat-cyan   { background: #CFFAFE; }
.stat-purple { background: #EDE9FE; }
.stat-value { font-weight: 700; font-size: 1rem; color: var(--text-1); }
.stat-label { font-size: .75rem; color: var(--text-3); }

/* Scroll indicator */
.scroll-indicator {
    position: absolute; bottom: 32px; left: 50%;
    transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    animation: bounce 2s ease-in-out infinite;
}
.scroll-wheel {
    width: 24px; height: 40px; border: 2px solid var(--border);
    border-radius: 99px; position: relative;
}
.scroll-wheel::after {
    content: ''; position: absolute; top: 6px; left: 50%;
    transform: translateX(-50%);
    width: 4px; height: 8px; background: var(--primary);
    border-radius: 99px;
    animation: scroll-ball 1.8s ease-in-out infinite;
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(-8px)} }
@keyframes scroll-ball { 0%{top:6px;opacity:1} 100%{top:20px;opacity:0} }

/* ─── SECTIONS COMMON ────────────────────────────────────── */
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
    display: inline-block; background: var(--primary-l);
    color: var(--primary); font-weight: 600; font-size: .8rem;
    letter-spacing: .1em; text-transform: uppercase;
    padding: 4px 12px; border-radius: 99px; margin-bottom: 12px;
}
.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 800; letter-spacing: -.03em;
    color: var(--text-1); margin-bottom: 12px;
}
.section-desc { color: var(--text-2); font-size: 1.05rem; max-width: 520px; margin: 0 auto; }

/* ─── FEATURES ───────────────────────────────────────────── */
.section-features { padding: 96px 0; background: var(--bg); }

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.feature-card {
    background: white; border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: rgba(37,99,235,.2);
}
.feature-icon-wrap {
    width: 48px; height: 48px; border-radius: var(--radius-sm);
    background: var(--primary-l); display: flex; align-items: center;
    justify-content: center; margin-bottom: 16px;
}
.feature-icon { font-size: 1.5rem; }
.feature-title { font-weight: 700; font-size: 1rem; margin-bottom: 8px; color: var(--text-1); }
.feature-desc  { color: var(--text-3); font-size: .9rem; line-height: 1.6; }

/* ─── ARCHITECTURE ───────────────────────────────────────── */
.section-architecture { padding: 96px 0; background: var(--bg-2); }

.arch-diagram {
    display: flex; flex-direction: column; align-items: center;
    gap: 16px; max-width: 600px; margin: 0 auto;
}
.arch-node {
    background: white; border: 2px solid var(--border);
    border-radius: var(--radius); padding: 16px 32px;
    text-align: center; min-width: 200px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.arch-node:hover { border-color: var(--primary); box-shadow: var(--shadow); }
.arch-icon  { font-size: 1.8rem; margin-bottom: 4px; }
.arch-label { font-weight: 600; font-size: .9rem; color: var(--text-1); }
.arch-label small { display: block; font-weight: 400; color: var(--text-3); font-size: .78rem; }
.arch-arrow { color: var(--primary); font-weight: 700; font-size: .9rem; opacity: .7; }
.arch-client { border-color: rgba(6,182,212,.4); }
.arch-api    { border-color: rgba(37,99,235,.4); background: var(--primary-l); }
.arch-db     { border-color: rgba(16,185,129,.4); background: #f0fdf4; }
.arch-row    { display: flex; gap: 16px; }
.arch-branch { display: flex; flex-direction: column; align-items: center; gap: 8px; }

/* ─── PRICING ─────────────────────────────────────────────── */
.section-pricing { padding: 96px 0; background: var(--bg); }

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px; margin-bottom: 40px;
}

.pricing-card {
    background: white; border: 2px solid var(--border);
    border-radius: var(--radius-lg); padding: 28px 24px;
    position: relative; transition: all var(--transition);
}
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }

.pricing-featured {
    border-color: var(--primary);
    background: linear-gradient(160deg, white 0%, var(--primary-l) 100%);
    box-shadow: var(--shadow-lg);
    transform: scale(1.02);
}
.pricing-featured:hover { transform: scale(1.02) translateY(-4px); }

.pricing-badge {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--primary); color: white;
    font-size: .75rem; font-weight: 700; padding: 4px 12px;
    border-radius: 99px; white-space: nowrap;
}

.pricing-header { margin-bottom: 20px; }
.plan-name  { font-size: .95rem; font-weight: 600; color: var(--text-2); margin-bottom: 8px; }
.plan-price { display: flex; align-items: baseline; gap: 4px; }
.price-currency { font-size: 1rem; font-weight: 700; color: var(--text-2); }
.price-amount {
    font-size: 2rem; font-weight: 800; color: var(--text-1);
    letter-spacing: -.03em;
}
.price-period { font-size: .85rem; color: var(--text-3); }

.plan-features { list-style: none; margin-bottom: 24px; display: flex; flex-direction: column; gap: 10px; }
.plan-feature  { display: flex; align-items: flex-start; gap: 8px; font-size: .9rem; color: var(--text-2); }
.check-icon    { width: 16px; height: 16px; flex-shrink: 0; margin-top: 2px; }

.btn-plan {
    display: block; text-align: center; padding: 12px;
    border-radius: var(--radius-sm); font-weight: 600;
    font-size: .9rem; text-decoration: none;
    transition: all var(--transition);
}

/* Trial Banner */
.trial-banner {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-lg); padding: 28px 32px;
    display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
    color: white;
}
.trial-icon { font-size: 2.4rem; flex-shrink: 0; }
.trial-content { flex: 1; min-width: 200px; }
.trial-content h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }
.trial-content p  { opacity: .85; font-size: .9rem; }
.btn-trial {
    background: white; color: var(--primary); font-weight: 700;
    padding: 12px 24px; border-radius: var(--radius-sm);
    text-decoration: none; white-space: nowrap;
    transition: all var(--transition); flex-shrink: 0;
}
.btn-trial:hover { background: rgba(255,255,255,.9); transform: translateY(-1px); }

/* ─── HOW IT WORKS ───────────────────────────────────────── */
.section-how { padding: 96px 0; background: var(--bg-2); }

.steps-list {
    list-style: none; max-width: 700px; margin: 0 auto;
    display: flex; flex-direction: column; gap: 0;
    counter-reset: step;
}
.step {
    display: flex; gap: 24px; align-items: flex-start;
    padding: 28px 0; border-left: 2px solid var(--border);
    padding-left: 32px; position: relative;
}
.step:last-child { border-left: 2px solid transparent; }
.step-num {
    position: absolute; left: -18px;
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--primary); color: white;
    font-weight: 700; font-size: .9rem;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 0 0 4px white, 0 0 0 6px rgba(37,99,235,.2);
    flex-shrink: 0;
}
.step-content h3 { font-weight: 700; margin-bottom: 6px; color: var(--text-1); }
.step-content p  { color: var(--text-2); font-size: .95rem; }

/* ─── FAQ ─────────────────────────────────────────────────── */
.section-faq { padding: 96px 0; background: var(--bg); }

.faq-list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 8px; }

.faq-item {
    background: white; border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
    transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--primary); }

.faq-question {
    width: 100%; display: flex; justify-content: space-between;
    align-items: center; gap: 16px; padding: 18px 20px;
    background: none; border: none; cursor: pointer; text-align: left;
    font-weight: 600; font-size: .95rem; color: var(--text-1);
    transition: background var(--transition);
}
.faq-question:hover { background: var(--bg-2); }
.faq-arrow { width: 16px; height: 16px; flex-shrink: 0; transition: transform var(--transition); }
.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-answer { padding: 0 20px 18px; color: var(--text-2); font-size: .95rem; line-height: 1.7; }

/* ─── DOWNLOAD HERO ──────────────────────────────────────── */
.section-download {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, #1e40af 50%, #0e7490 100%);
    color: white;
}
.section-download .section-title { color: white; }

.btn-download-hero {
    display: inline-flex; align-items: center; gap: 10px;
    background: white; color: var(--primary); font-weight: 700;
    padding: 14px 28px; border-radius: var(--radius); font-size: 1rem;
    text-decoration: none; box-shadow: 0 4px 20px rgba(0,0,0,.2);
    transition: all var(--transition);
}
.btn-download-hero:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,.3); }

.btn-register-hero {
    display: inline-flex; align-items: center;
    background: rgba(255,255,255,.15); color: white;
    border: 2px solid rgba(255,255,255,.4); font-weight: 600;
    padding: 14px 28px; border-radius: var(--radius); font-size: 1rem;
    text-decoration: none; transition: all var(--transition);
}
.btn-register-hero:hover { background: rgba(255,255,255,.25); border-color: white; }

.text-blue-100 { color: #DBEAFE; }
.text-blue-200 { color: #BFDBFE; }

/* ─── FOOTER ─────────────────────────────────────────────── */
.footer {
    background: #0F172A; color: #94A3B8; padding: 56px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px; margin-bottom: 40px;
}
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .footer-grid { grid-template-columns: 1fr; } }

.footer-brand .navbar-brand { color: white; margin-bottom: 12px; }
.footer-brand .logo-text { color: white; }
.footer-tagline { font-size: .85rem; line-height: 1.6; margin: 8px 0 16px; }

.footer-socials { display: flex; gap: 8px; }
.social-btn {
    width: 36px; height: 36px; border-radius: var(--radius-sm);
    background: rgba(255,255,255,.08); display: flex;
    align-items: center; justify-content: center; color: #94A3B8;
    text-decoration: none; transition: all var(--transition);
}
.social-btn:hover { background: rgba(255,255,255,.16); color: white; }

.footer-heading { color: #E2E8F0; font-weight: 600; font-size: .85rem;
    letter-spacing: .05em; text-transform: uppercase; margin-bottom: 12px; }

.footer-links { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.footer-links a {
    color: #94A3B8; font-size: .875rem; text-decoration: none;
    transition: color var(--transition);
}
.footer-links a:hover { color: white; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px; font-size: .85rem;
}
.footer-version { display: flex; align-items: center; gap: 8px; }

/* Status dots */
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; }
.status-green  { background: #22C55E; box-shadow: 0 0 6px rgba(34,197,94,.5); }
.status-yellow { background: #F59E0B; }
.status-red    { background: #EF4444; }

/* ─── FLOATING SUPPORT ───────────────────────────────────── */
.support-float {
    position: fixed; bottom: 28px; right: 24px; z-index: 90;
    display: flex; flex-direction: column; align-items: flex-end; gap: 8px;
}

.support-toggle {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white; border: none; border-radius: 99px;
    padding: 12px 20px; font-weight: 600; font-size: .875rem;
    cursor: pointer; display: flex; align-items: center; gap: 8px;
    box-shadow: 0 4px 20px rgba(37,99,235,.4);
    transition: all var(--transition);
}
.support-toggle:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(37,99,235,.5); }

.support-menu {
    background: white; border: 1px solid var(--border);
    border-radius: var(--radius); padding: 8px;
    box-shadow: var(--shadow-lg);
    display: flex; flex-direction: column; gap: 4px; min-width: 200px;
}
.support-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px; border-radius: var(--radius-sm);
    color: var(--text-1); font-weight: 500; font-size: .9rem;
    text-decoration: none; transition: all var(--transition);
}
.support-item:hover { background: var(--bg-2); color: var(--primary); }

/* ─── REVEAL ANIMATION ───────────────────────────────────── */
.reveal {
    opacity: 0; transform: translateY(32px);
    transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ─── ADMIN LAYOUT (used in admin dashboard) ─────────────── */
.admin-wrapper { display: flex; min-height: 100vh; font-family: var(--font); background: var(--bg-2); }

.sidebar {
    width: 240px; flex-shrink: 0;
    background: #0F172A; color: #94A3B8;
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0;
    overflow-y: auto; z-index: 50;
    transition: transform var(--transition);
}
.sidebar-logo {
    padding: 20px; border-bottom: 1px solid rgba(255,255,255,.06);
    display: flex; align-items: center; gap: 10px; color: white;
    font-weight: 700; font-size: .95rem; text-decoration: none;
}
.sidebar-nav { padding: 12px 8px; flex: 1; }
.sidebar-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 12px; border-radius: var(--radius-sm);
    color: #94A3B8; font-weight: 500; font-size: .875rem;
    text-decoration: none; transition: all var(--transition);
    margin-bottom: 2px;
}
.sidebar-item:hover, .sidebar-item.active { background: rgba(37,99,235,.15); color: #93C5FD; }
.sidebar-item.active { color: #BFDBFE; font-weight: 600; }
.sidebar-section {
    font-size: .7rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .1em; color: #475569; padding: 12px 12px 6px;
}

.admin-main { margin-left: 240px; flex: 1; }

.topbar {
    background: white; border-bottom: 1px solid var(--border);
    padding: 0 24px; height: 60px; display: flex;
    align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 40;
}
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: .875rem; color: var(--text-3); }
.breadcrumb .current { color: var(--text-1); font-weight: 500; }

.page-content { padding: 24px; }

/* Admin Cards */
.stat-card {
    background: white; border: 1px solid var(--border);
    border-radius: var(--radius); padding: 20px 24px;
    box-shadow: var(--shadow-sm);
}
.stat-cards-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.stat-card-value { font-size: 2rem; font-weight: 800; color: var(--text-1); letter-spacing: -.03em; }
.stat-card-label { font-size: .85rem; color: var(--text-3); margin-top: 4px; }
.stat-card-icon  { font-size: 1.8rem; margin-bottom: 12px; }

/* Admin Table */
.data-table {
    background: white; border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden;
}
.data-table-header {
    padding: 16px 20px; border-bottom: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px;
}
.data-table table { width: 100%; border-collapse: collapse; }
.data-table th {
    background: var(--bg-2); padding: 10px 16px;
    text-align: left; font-weight: 600; font-size: .8rem;
    color: var(--text-2); letter-spacing: .02em; text-transform: uppercase;
    border-bottom: 1px solid var(--border);
}
.data-table td {
    padding: 12px 16px; border-bottom: 1px solid #F1F5F9;
    font-size: .875rem; color: var(--text-2);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: #FAFAFE; }

/* Badges */
.badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px; border-radius: 99px; font-size: .75rem; font-weight: 600;
}
.badge-success { background: #DCFCE7; color: #16A34A; }
.badge-danger  { background: #FEE2E2; color: #DC2626; }
.badge-warning { background: #FEF9C3; color: #B45309; }
.badge-info    { background: #DBEAFE; color: #2563EB; }
.badge-neutral { background: var(--bg-3); color: var(--text-3); }

/* Form */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-weight: 600; font-size: .875rem; margin-bottom: 6px; color: var(--text-1); }
.form-control {
    width: 100%; padding: 9px 12px; border: 1.5px solid var(--border);
    border-radius: var(--radius-sm); font-size: .9rem; color: var(--text-1);
    background: white; font-family: var(--font);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.1); }

/* Toast */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
    background: white; border: 1px solid var(--border);
    border-radius: var(--radius); padding: 14px 20px;
    box-shadow: var(--shadow-lg); min-width: 280px;
    display: flex; align-items: flex-start; gap: 10px;
    animation: toast-in .3s ease;
}
@keyframes toast-in { from{opacity:0;transform:translateX(40px)} to{opacity:1;transform:none} }
.toast-success { border-left: 4px solid #22C55E; }
.toast-error   { border-left: 4px solid #EF4444; }
.toast-warning { border-left: 4px solid #F59E0B; }
.toast-info    { border-left: 4px solid #2563EB; }

/* Modal */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(15,23,42,.5);
    backdrop-filter: blur(4px); z-index: 200;
    display: flex; align-items: center; justify-content: center; padding: 16px;
    animation: modal-bg-in .2s ease;
}
@keyframes modal-bg-in { from{opacity:0} to{opacity:1} }
.modal {
    background: white; border-radius: var(--radius-lg);
    max-width: 520px; width: 100%; padding: 28px;
    box-shadow: 0 24px 80px rgba(0,0,0,.18);
    animation: modal-in .25s cubic-bezier(.34,1.56,.64,1);
}
@keyframes modal-in { from{opacity:0;transform:scale(.9)} to{opacity:1;transform:none} }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.modal-title  { font-weight: 700; font-size: 1.1rem; color: var(--text-1); }
.modal-close  { background: none; border: none; cursor: pointer; color: var(--text-3); font-size: 1.2rem; }

/* Responsive */
@media (max-width: 768px) {
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions a { text-align: center; }
    .hero-stats { gap: 12px; }
    .arch-row { flex-direction: column; }
    .pricing-grid { grid-template-columns: 1fr; }
    .pricing-featured { transform: none; }
    .features-grid { grid-template-columns: 1fr; }
    .trial-banner { flex-direction: column; text-align: center; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: none; }
    .admin-main { margin-left: 0; }
}