/* OmniVoice SaaS - Styles */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --bg: #0f172a;
    --bg2: #1e293b;
    --bg3: #334155;
    --text: #e2e8f0;
    --text2: #94a3b8;
    --border: #475569;
    --success: #22c55e;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; width: 100%; }

/* Navbar */
.navbar {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.4em; font-weight: 700; color: var(--primary); text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.nav-links a { color: var(--text2); text-decoration: none; font-size: 0.85em; transition: color .2s; white-space: nowrap; }
.nav-links a:hover { color: var(--text); }
.admin-link { color: var(--warning) !important; }
.credits-badge {
    background: var(--primary);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85em;
    font-weight: 600;
}
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5em; cursor: pointer; }

/* Nav dropdown (hover menu cho Voice→Text v1/v2) */
.nav-dropdown { position: relative; display: inline-block; }
.nav-dropdown-toggle { cursor: pointer; }
.nav-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg2);
    min-width: 200px;
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,.4);
    padding: 6px 0;
    z-index: 200;
    margin-top: 4px;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu { display: block; }
.nav-dropdown-menu a {
    display: block !important;
    padding: 8px 14px !important;
    font-size: 0.9em !important;
    transition: background .15s;
}
.nav-dropdown-menu a:hover { background: var(--bg3); color: var(--text) !important; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 0.95em;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all .2s;
}
.btn-sm { padding: 6px 14px; font-size: 0.85em; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { opacity: .85; }
.btn-success { background: var(--success); color: #fff; }
.btn-block { width: 100%; text-align: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Cards */
.card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 20px;
}
.card-title { font-size: 1.1em; font-weight: 600; margin-bottom: 16px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-size: 0.9em; color: var(--text2); }
.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 0.95em;
    transition: border-color .2s;
}
.form-control:focus { outline: none; border-color: var(--primary); }
select.form-control { appearance: auto; }
textarea.form-control { resize: vertical; min-height: 100px; font-family: inherit; }

/* Grid */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: 1fr 1fr 1fr; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* Stats */
.stat-card { text-align: center; }
.stat-value { font-size: 2em; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 0.85em; color: var(--text2); margin-top: 4px; }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.9em; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--text2); font-weight: 600; font-size: 0.85em; text-transform: uppercase; }

/* Alerts */
.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 0.9em; }
.alert-error { background: rgba(239,68,68,.15); border: 1px solid var(--danger); color: #fca5a5; }
.alert-success { background: rgba(34,197,94,.15); border: 1px solid var(--success); color: #86efac; }

/* Hero */
.hero { text-align: center; padding: 80px 0 60px; }
.hero h1 { font-size: 2.8em; font-weight: 800; margin-bottom: 16px; }
.hero h1 span { color: var(--primary); }
.hero p { font-size: 1.2em; color: var(--text2); max-width: 600px; margin: 0 auto 32px; }

/* Pricing */
.pricing-cards { display: flex; gap: 24px; justify-content: center; flex-wrap: wrap; margin: 40px 0; }
.pricing-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.pricing-card {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    position: relative;
    min-width: 0;
}
.pricing-card.featured { border-color: var(--primary); box-shadow: 0 0 30px rgba(99,102,241,.2); }
.pricing-label { font-size: 0.7em; text-transform: uppercase; letter-spacing: 2px; color: var(--text2); margin-bottom: 4px; font-weight: 600; }
.pricing-card h3 { font-size: 1.3em; margin-bottom: 12px; }
.pricing-card .price { font-size: 2.2em; font-weight: 800; color: var(--primary); }
.pricing-card .price small { font-size: 0.4em; color: var(--text2); }
.pricing-card ul { list-style: none; margin: 20px 0; text-align: left; flex: 1; }
.pricing-card li { padding: 6px 0; color: var(--text2); font-size: 0.85em; }
.pricing-card li::before { content: "✓ "; color: var(--success); font-weight: 700; }

/* Features */
.features { padding: 60px 0; }
.features h2 { text-align: center; font-size: 2em; margin-bottom: 40px; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-item { background: var(--bg2); border-radius: 12px; padding: 28px; text-align: center; }
.feature-icon { font-size: 2.5em; margin-bottom: 12px; }
.feature-item h3 { margin-bottom: 8px; }
.feature-item p { color: var(--text2); font-size: 0.9em; }

/* Audio player */
.audio-result {
    background: var(--bg3);
    border-radius: var(--radius);
    padding: 20px;
    margin-top: 16px;
    display: none;
}
.audio-result audio { width: 100%; margin-top: 10px; }
.audio-result .info { font-size: 0.85em; color: var(--text2); }

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 20px; }
.tab {
    padding: 10px 20px;
    cursor: pointer;
    color: var(--text2);
    border-bottom: 2px solid transparent;
    transition: all .2s;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Testimonials */
.section-testimonials { padding: 60px 0; }
.section-testimonials h2 { text-align: center; font-size: 2em; margin-bottom: 40px; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testimonial-card {
    background: var(--bg2); border: 1px solid var(--border); border-radius: 12px;
    padding: 28px; display: flex; flex-direction: column; justify-content: space-between;
}
.testimonial-text { color: var(--text); font-size: 0.95em; line-height: 1.6; margin-bottom: 20px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
    width: 44px; height: 44px; border-radius: 50%; background: var(--primary);
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.85em; flex-shrink: 0;
}
.testimonial-name { font-weight: 600; font-size: 0.9em; }
.testimonial-role { color: var(--text2); font-size: 0.8em; }

/* Partners */
.section-partners { padding: 60px 0; }
.section-partners h2 { text-align: center; font-size: 2em; margin-bottom: 12px; }
.partners-grid { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 32px; }
.partner-item { text-align: center; }
.partner-logo {
    width: 72px; height: 72px; border-radius: 16px; background: var(--bg2); border: 1px solid var(--border);
    display: flex; align-items: center; justify-content: center; margin: 0 auto 8px;
    font-weight: 800; font-size: 1.3em; color: var(--primary); overflow: hidden;
}
.partner-logo img { width: 100%; height: 100%; object-fit: contain; }
.partner-name { font-size: 0.85em; color: var(--text2); }

/* CTA Section */
.section-cta {
    text-align: center; padding: 80px 0 60px;
    background: linear-gradient(135deg, rgba(99,102,241,.08) 0%, rgba(99,102,241,.02) 100%);
    border-radius: 24px; margin: 40px 0;
}
.section-cta h2 { font-size: 2em; margin-bottom: 12px; }
.section-cta p { color: var(--text2); font-size: 1.1em; margin-bottom: 28px; }

/* Footer */
.footer { margin-top: auto; padding: 40px 0 20px; color: var(--text2); font-size: 0.85em; border-top: 1px solid var(--border); background: var(--bg2); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 30px; }
.footer-brand { font-size: 1.3em; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.footer-about { color: var(--text2); font-size: 0.9em; line-height: 1.6; }
.footer-title { font-weight: 600; color: var(--text); margin-bottom: 12px; font-size: 0.95em; }
.footer-col a { display: block; color: var(--text2); text-decoration: none; padding: 3px 0; font-size: 0.9em; transition: color .2s; }
.footer-col a:hover { color: var(--primary); }
.footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid var(--border); color: var(--text2); }

/* Page header */
.page-header { padding: 30px 0 20px; }
.page-header h1 { font-size: 1.8em; }
.page-header p { color: var(--text2); margin-top: 4px; }

/* Inline form */
.inline-form { display: flex; gap: 8px; align-items: end; }
.inline-form .form-group { margin-bottom: 0; }

/* Tag/Badge */
.badge { padding: 3px 8px; border-radius: 4px; font-size: 0.8em; font-weight: 600; }
.badge-green { background: rgba(34,197,94,.2); color: var(--success); }
.badge-red { background: rgba(239,68,68,.2); color: var(--danger); }
.badge-blue { background: rgba(99,102,241,.2); color: var(--primary); }
.badge-yellow { background: rgba(245,158,11,.2); color: var(--warning); }
.badge-purple { background: rgba(168,85,247,.2); color: #a855f7; }

/* Loading spinner */
.spinner { display: inline-block; width: 20px; height: 20px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Range input */
input[type="range"] { width: 100%; accent-color: var(--primary); }
.range-value { display: inline-block; min-width: 40px; text-align: center; color: var(--primary); font-weight: 600; }

/* Auth page */
.auth-page { display: flex; justify-content: center; align-items: center; min-height: 70vh; }
.auth-card { width: 100%; max-width: 420px; }

/* Mono text */
.mono { font-family: 'Cascadia Code', 'Fira Code', monospace; font-size: 0.85em; }

/* Responsive */
@media (max-width: 1024px) {
    .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg2); flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border); gap: 12px; }
    .nav-links.open { display: flex; }
    .nav-links a { font-size: 0.95em; }
    .nav-toggle { display: block; }
    /* Mobile: dropdown items đứng cùng cấp */
    .nav-dropdown { display: block; width: 100%; }
    .nav-dropdown-menu { position: static; box-shadow: none; border: none; padding: 4px 0 4px 16px; margin: 0; min-width: 0; background: transparent; }
    .hero h1 { font-size: 2em; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .pricing-cards { flex-direction: column; align-items: center; }
    .pricing-row { grid-template-columns: 1fr 1fr; }
    .testimonials-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}