/* ============================================
   AdVault — Professional Ad Platform Styles
   Stripe-inspired clean design
   ============================================ */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: #16161e;
    --bg-card-hover: #1c1c26;
    --bg-elevated: #1e1e2a;
    
    --border-subtle: rgba(255,255,255,0.06);
    --border-default: rgba(255,255,255,0.1);
    --border-strong: rgba(255,255,255,0.16);
    
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b8;
    --text-tertiary: #6b6b82;
    --text-accent: #6e56cf;
    
    --accent: #7c5cfc;
    --accent-hover: #8b6eff;
    --accent-subtle: rgba(124,92,252,0.12);
    --accent-glow: rgba(124,92,252,0.25);
    
    --green: #22c55e;
    --green-subtle: rgba(34,197,94,0.12);
    --orange: #f59e0b;
    --orange-subtle: rgba(245,158,11,0.12);
    --red: #ef4444;
    --cyan: #06b6d4;
    --cyan-subtle: rgba(6,182,212,0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(124,92,252,0.15);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

img { max-width: 100%; height: auto; }

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===================== HEADER ===================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.nav { display: flex; align-items: center; gap: 8px; }

.nav a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav a:hover {
    color: var(--text-primary);
    background: var(--border-subtle);
}

.nav .btn-nav {
    background: var(--accent);
    color: #fff;
    font-weight: 600;
}

.nav .btn-nav:hover {
    background: var(--accent-hover);
    color: #fff;
}

/* ===================== HERO ===================== */
.hero {
    padding: 100px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: var(--accent-subtle);
    border: 1px solid rgba(124,92,252,0.2);
    border-radius: 100px;
    font-size: 0.82rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 28px;
    position: relative;
}

.hero-badge .dot {
    width: 6px;
    height: 6px;
    background: var(--green);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
    position: relative;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, #7c5cfc, #a78bfa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================== BUTTONS ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px rgba(124,92,252,0.3);
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    box-shadow: 0 0 30px rgba(124,92,252,0.4);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-strong);
    color: var(--text-primary);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.82rem;
}

.btn-ghost {
    background: transparent;
    color: var(--accent);
    border: 1px solid rgba(124,92,252,0.3);
}

.btn-ghost:hover {
    background: var(--accent-subtle);
    color: var(--accent-hover);
}

/* ===================== STATS BAR ===================== */
.stats-bar {
    padding: 48px 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.stat-value.purple { color: var(--accent); }
.stat-value.green { color: var(--green); }
.stat-value.cyan { color: var(--cyan); }
.stat-value.orange { color: var(--orange); }

.stat-label {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    margin-top: 4px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===================== SECTIONS ===================== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ===================== AD ZONES ===================== */
.zones-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.zone-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.zone-card:hover {
    border-color: rgba(124,92,252,0.3);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.zone-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 20px;
}

.zone-size-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: var(--accent-subtle);
    border: 1px solid rgba(124,92,252,0.15);
    border-radius: 100px;
    font-size: 0.75rem;
    color: var(--accent);
    font-weight: 600;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

.zone-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.78rem;
    font-weight: 500;
}

.zone-status.active { color: var(--green); }
.zone-status.available { color: var(--orange); }

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

.zone-status.active .status-dot { background: var(--green); }
.zone-status.available .status-dot { background: var(--orange); }

.zone-preview {
    background: var(--bg-primary);
    border: 1px dashed var(--border-default);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.zone-preview-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-tertiary);
}

.zone-preview-content .icon {
    font-size: 1.5rem;
    opacity: 0.5;
}

.zone-preview-content span {
    font-size: 0.78rem;
    font-weight: 500;
}

/* Адаптивные размеры превью */
.zone-preview[data-size="728x90"]  { width: 100%; aspect-ratio: 728/90; }
.zone-preview[data-size="468x60"]  { width: 100%; aspect-ratio: 468/60; }
.zone-preview[data-size="336x280"] { width: 100%; max-width: 336px; aspect-ratio: 336/280; margin: 0 auto; }
.zone-preview[data-size="300x250"] { width: 100%; max-width: 300px; aspect-ratio: 300/250; margin: 0 auto; }
.zone-preview[data-size="300x200"] { width: 100%; max-width: 300px; aspect-ratio: 300/200; margin: 0 auto; }
.zone-preview[data-size="320x50"]  { width: 100%; aspect-ratio: 320/50; }
.zone-preview[data-size="160x600"] { width: 160px; aspect-ratio: 160/600; margin: 0 auto; min-height: 200px; }
.zone-preview[data-size="120x600"] { width: 120px; aspect-ratio: 120/600; margin: 0 auto; min-height: 200px; }

.zone-card-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.zone-card-info p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.zone-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border-subtle);
}

.zone-price {
    display: flex;
    flex-direction: column;
}

.zone-price .from {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.zone-price .amount {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

.zone-price .period {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.zone-buy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.zone-buy-btn:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
}

/* ===================== PRICING ===================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    transition: all 0.3s;
}

.pricing-card:hover {
    border-color: var(--border-strong);
}

.pricing-card.featured {
    border-color: var(--accent);
    box-shadow: var(--shadow-glow);
}

.pricing-card.featured::before {
    content: 'Популярный';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--accent);
    color: #fff;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pricing-card .plan-name {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 8px;
}

.pricing-card .plan-price {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}

.pricing-card .plan-period {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    margin-bottom: 24px;
}

.pricing-card .plan-features {
    list-style: none;
    margin-bottom: 28px;
}

.pricing-card .plan-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    color: var(--text-secondary);
    padding: 8px 0;
}

.pricing-card .plan-features li .check {
    color: var(--green);
    font-weight: 700;
}

/* ===================== HOW IT WORKS ===================== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step-card {
    text-align: center;
    padding: 32px 24px;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--accent-subtle);
    border: 1px solid rgba(124,92,252,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--accent);
    margin: 0 auto 20px;
}

.step-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.step-card p {
    font-size: 0.88rem;
    color: var(--text-tertiary);
    line-height: 1.6;
}

/* ===================== FAQ ===================== */
.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid var(--border-subtle);
}

.faq-item summary {
    padding: 20px 0;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-primary);
    transition: color 0.2s;
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
    content: '+';
    font-size: 1.3rem;
    color: var(--text-tertiary);
    transition: transform 0.2s;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item summary:hover { color: var(--accent); }

.faq-item .faq-answer {
    padding: 0 0 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===================== FOOTER ===================== */
.footer {
    padding: 60px 0 32px;
    border-top: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    margin-top: auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .logo { margin-bottom: 12px; }

.footer-brand p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    line-height: 1.6;
    max-width: 280px;
}

.footer-col h4 {
    font-size: 0.78rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 0.88rem;
    color: var(--text-secondary);
    padding: 4px 0;
    transition: color 0.2s;
}

.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ===================== ADMIN ===================== */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 240px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    padding: 24px 16px;
    flex-shrink: 0;
}

.admin-sidebar .logo {
    margin-bottom: 32px;
    padding: 0 8px;
}

.admin-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 2px;
    transition: all 0.2s;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: var(--accent-subtle);
    color: var(--accent);
}

.admin-main {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}

.admin-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
}

/* Admin Table */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.78rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-subtle);
}

.admin-table td {
    padding: 16px;
    font-size: 0.88rem;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

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

/* Form elements */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.88rem;
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* Cards in admin */
.admin-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.admin-card h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 16px;
}

/* Stat mini cards */
.mini-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.mini-stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 20px;
}

.mini-stat-card .label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.mini-stat-card .value {
    font-size: 1.5rem;
    font-weight: 800;
}

/* Toggle switch */
.toggle {
    position: relative;
    width: 44px;
    height: 24px;
}

.toggle input { display: none; }

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--border-strong);
    border-radius: 100px;
    cursor: pointer;
    transition: background 0.3s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    top: 3px;
    left: 3px;
    transition: transform 0.3s;
}

.toggle input:checked + .toggle-slider {
    background: var(--accent);
}

.toggle input:checked + .toggle-slider::before {
    transform: translateX(20px);
}

/* Alert */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    margin-bottom: 20px;
}

.alert-success {
    background: var(--green-subtle);
    color: var(--green);
    border: 1px solid rgba(34,197,94,0.2);
}

.alert-error {
    background: rgba(239,68,68,0.12);
    color: var(--red);
    border: 1px solid rgba(239,68,68,0.2);
}

/* Login form */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.login-card h1 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    text-align: center;
}

.login-card p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    text-align: center;
    margin-bottom: 28px;
}

.login-card .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 12px;
    font-size: 0.9rem;
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 1024px) {
    .zones-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .steps-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .mini-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero { padding: 60px 0 40px; }
    .hero h1 { font-size: 2rem; }
    .section { padding: 60px 0; }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .nav { display: none; }
    .header-inner { height: 56px; }
    .admin-sidebar { display: none; }
    .admin-main { padding: 20px; }
    .mini-stats { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: center; }
    .mini-stats { grid-template-columns: 1fr; }
}