/* ============================================
   СОВРЕМЕННЫЙ ПРОФЕССИОНАЛЬНЫЙ ДИЗАЙН
   ============================================ */
:root {
    --primary: #0066FF;
    --primary-hover: #0052CC;
    --primary-light: #E6F2FF;
    --secondary: #6366F1;
    --accent: #10B981;
    --text-primary: #0F172A;
    --text-secondary: #64748B;
    --text-tertiary: #94A3B8;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;
    --border: #E2E8F0;
    --border-light: #F1F5F9;
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   НАВИГАЦИЯ
   ============================================ */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.8);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    transition: color 0.2s ease;
}

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

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.2s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* ============================================
   ОСНОВНОЙ КОНТЕНТ
   ============================================ */
.main-content {
    flex: 1;
    padding: 0;
}

.messages {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px;
}

.alert {
    padding: 16px 20px;
    margin-bottom: 16px;
    border-radius: var(--radius-md);
    border: 1px solid;
    font-size: 14px;
    font-weight: 500;
}

.alert-success {
    background: #F0FDF4;
    border-color: #BBF7D0;
    color: #166534;
}

.alert-error {
    background: #FEF2F2;
    border-color: #FECACA;
    color: #991B1B;
}

.alert-info {
    background: #EFF6FF;
    border-color: #BFDBFE;
    color: #1E40AF;
}

/* ============================================
   ЛЕНДИНГ
   ============================================ */
.landing-hero {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 120px 0 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.landing-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.landing-hero .container {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: 22px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 48px;
    font-weight: 400;
}

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

/* Секции */
.landing-section {
    padding: 100px 0;
}

.landing-section-alt {
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 48px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
    color: var(--text-primary);
    letter-spacing: -1.5px;
}

.section-subtitle {
    text-align: center;
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 64px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    font-weight: 400;
}

/* Карточки возможностей */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.feature-card {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 20px;
    display: inline-block;
    width: 64px;
    height: 64px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.feature-card h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 16px;
}

/* Метрики */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.metric-card {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    text-align: center;
    transition: all 0.3s ease;
}

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

.metric-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -1px;
}

.metric-label {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Преимущества */
.benefits-list {
    max-width: 900px;
    margin: 0 auto;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 24px;
    padding: 32px;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    margin-bottom: 16px;
    transition: all 0.3s ease;
}

.benefit-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
    transform: translateX(4px);
}

.benefit-icon {
    font-size: 32px;
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: var(--primary-light);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.benefit-content h4 {
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.benefit-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 16px;
}

/* CTA секция */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    border-radius: var(--radius-2xl);
    margin: 100px 24px;
}

.cta-section h2 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -1.5px;
}

.cta-section p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.95;
    font-weight: 400;
}

/* ============================================
   ФОРМЫ
   ============================================ */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: 48px 0;
    background: var(--bg-secondary);
}

.auth-card {
    background: var(--bg-primary);
    padding: 48px;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 440px;
    border: 1px solid var(--border);
}

.auth-card h2 {
    margin-bottom: 8px;
    text-align: center;
    color: var(--text-primary);
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -1px;
}

.auth-form {
    margin-top: 32px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 15px;
    transition: all 0.2s ease;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-text {
    display: block;
    margin-top: 6px;
    font-size: 13px;
    color: var(--text-tertiary);
}

.error {
    color: #DC2626;
    font-size: 13px;
    margin-top: 6px;
    display: block;
    font-weight: 500;
}

.auth-links {
    text-align: center;
    margin-top: 24px;
}

.auth-links p {
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-links a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: color 0.2s ease;
}

.auth-links a:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* ============================================
   КНОПКИ
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    text-align: center;
    line-height: 1.5;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1.5px solid var(--border);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-secondary);
    transform: translateY(-1px);
}

.btn-block {
    width: 100%;
    display: flex;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

/* ============================================
   ДАШБОРД
   ============================================ */
.dashboard-container {
    padding: 48px 0;
    background: var(--bg-secondary);
    min-height: calc(100vh - 200px);
}

.dashboard-header {
    background: var(--bg-primary);
    padding: 48px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    margin-bottom: 32px;
}

.dashboard-container h1 {
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -1.5px;
}

.dashboard-subtitle {
    color: var(--text-secondary);
    font-size: 18px;
    font-weight: 400;
}

.dashboard-content {
    margin-top: 32px;
}

.dashboard-card {
    background: var(--bg-primary);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.dashboard-card:hover {
    box-shadow: var(--shadow-md);
}

.dashboard-card h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.dashboard-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
    font-size: 16px;
}

.dashboard-card ul,
.dashboard-card ol {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
    font-size: 16px;
    padding-left: 24px;
}

.dashboard-card ul li,
.dashboard-card ol li {
    margin-bottom: 8px;
}

.dashboard-card strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   ФУТЕР
   ============================================ */
.footer {
    background: var(--bg-primary);
    color: var(--text-secondary);
    padding: 48px 0 32px;
    text-align: center;
    margin-top: auto;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 14px;
    margin-bottom: 4px;
}

/* ============================================
   АДАПТИВНОСТЬ
   ============================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .section-title {
        font-size: 36px;
    }
    
    .section-subtitle {
        font-size: 18px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .auth-card {
        padding: 32px 24px;
        margin: 0 16px;
    }
    
    .dashboard-container h1 {
        font-size: 32px;
    }
    
    .dashboard-card {
        padding: 24px;
    }
    
    .cta-section {
        margin: 60px 16px;
        padding: 60px 24px;
    }
    
    .cta-section h2 {
        font-size: 32px;
    }
    
    .nav-menu {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .container {
        padding: 0 16px;
    }
    
    .landing-section {
        padding: 60px 0;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .feature-card {
        padding: 24px;
    }
}