/* ===== Базовые настройки ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-primary: #E53935;
    --color-primary-dark: #C62828;
    --color-primary-light: #FFCDD2;
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #E8E8E8;
    --color-success: #4CAF50;
    --color-danger: #F44336;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
    --container-max: 1100px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-bg);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ===== Фон-заглушка ===== */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: 
        linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 50%, #f0f3f7 100%);
    background-attachment: fixed;
    background-size: cover;
}

.bg-layer {
    background: url('../images/bg_presentation.jpg') center top / cover fixed no-repeat;
}

/* ===== Контейнер ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ===== Шапка ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

/* ===== Секции ===== */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--color-text);
    letter-spacing: -0.5px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    margin-bottom: 48px;
}

/* ===== Hero ===== */
.hero {
    padding-top: 60px;
    padding-bottom: 60px;
}

.hero-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: -1px;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ===== Таблица сравнения ===== */
.comparison {
    margin-bottom: 60px;
}

.comparison-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.comparison-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    flex: 0 1 340px;
    max-width: 340px;
}

.comparison-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.comparison-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.comparison-label {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.comparison-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.comparison-item {
    flex: 1;
    padding: 14px;
    border-radius: var(--radius);
    font-size: 0.9rem;
}

.comparison-item p {
    margin-top: 4px;
    color: var(--color-text-secondary);
}

.comparison-bad {
    background: #FFF5F5;
    border: 1px solid #FFCDD2;
}

.comparison-bad .comparison-tag {
    color: var(--color-danger);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-good {
    background: #F0FFF4;
    border: 1px solid #C6F6D5;
}

.comparison-good .comparison-tag {
    color: var(--color-success);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.comparison-arrow {
    color: var(--color-text-muted);
    font-size: 1.2rem;
    font-weight: 700;
}

/* ===== Особенности ===== */
.features-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.feature-box {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.feature-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-primary);
}

.feature-icon {
    color: var(--color-primary);
    margin-bottom: 16px;
}

.feature-box p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-style: italic;
}

/* ===== Как это работает ===== */
.how-it-works {
    background: rgba(255, 255, 255, 0.6);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.steps {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.step {
    flex: 1;
    min-width: 200px;
    max-width: 240px;
    text-align: center;
    padding: 24px 16px;
    position: relative;
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin: 0 auto 16px;
}

.step-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.step-content p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.step-connector {
    width: 40px;
    min-width: 40px;
    align-self: center;
    height: 2px;
    background: linear-gradient(90deg, var(--color-primary-light), var(--color-primary));
    position: relative;
}

.step-connector::after {
    content: '';
    position: absolute;
    right: -4px;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left: 6px solid var(--color-primary);
}

/* ===== Схема уведомлений ===== */
.notification-scheme {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
    max-width: 800px;
    margin: 0 auto;
}

.notification-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    position: relative;
}

.notification-badge {
    position: absolute;
    top: -16px;
    left: 24px;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.notification-you {
    border-top: 3px solid var(--color-primary);
}

.notification-partner {
    border-top: 3px solid var(--color-success);
}

.notification-partner .notification-badge {
    background: var(--color-success);
}

.notification-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
    margin-top: 8px;
    color: var(--color-text);
}

.notification-fields {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.field {
    display: flex;
    align-items: center;
    gap: 12px;
}

.field span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    min-width: 80px;
    flex-shrink: 0;
}

.field-line {
    flex: 1;
    height: 8px;
    background: var(--color-border);
    border-radius: 4px;
    opacity: 0.6;
}

/* ===== Как подключить ===== */
.connect-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.connect-step {
    text-align: center;
    padding: 24px;
    min-width: 160px;
}

.connect-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin: 0 auto 12px;
}

.connect-step p {
    font-size: 0.95rem;
    color: var(--color-text);
    font-weight: 500;
}

.connect-arrow {
    color: var(--color-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

/* ===== Почему выбирают нас ===== */
.why-title {
    margin-top: 60px;
    margin-bottom: 40px;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 20px;
    margin-bottom: 60px;
}

.why-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.why-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.why-card-wide {
    grid-column: 1 / -1;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.why-icon {
    width: 52px;
    height: 52px;
    background: var(--color-primary-light);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: 16px;
}

.why-card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-text);
}

.why-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ===== CTA ===== */
.cta-section {
    text-align: center;
    padding: 60px 24px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-lg);
    color: white;
    max-width: 700px;
    margin: 0 auto;
}

.cta-section h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: white;
    color: var(--color-primary);
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}

.cta-button svg {
    transition: var(--transition);
}

.cta-button:hover svg {
    transform: translateX(4px);
}

/* ===== Футер ===== */
.footer {
    background: var(--color-text);
    color: white;
    padding: 48px 0 24px;
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 32px;
    margin-bottom: 32px;
}

.footer-logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary-light);
    display: block;
    margin-bottom: 8px;
}

.footer-desc {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ===== Адаптивность ===== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section {
        padding: 48px 0;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .steps {
        flex-direction: column;
        align-items: center;
    }

    .step {
        max-width: 100%;
        width: 100%;
    }

    .step-connector {
        width: 2px;
        height: 30px;
        background: linear-gradient(180deg, var(--color-primary-light), var(--color-primary));
    }

    .step-connector::after {
        right: 50%;
        top: auto;
        bottom: -4px;
        transform: translateX(50%);
        border: 5px solid transparent;
        border-top: 6px solid var(--color-primary);
        border-left: 5px solid transparent;
    }

    .connect-steps {
        flex-direction: column;
        gap: 8px;
    }

    .connect-arrow {
        transform: rotate(90deg);
    }

    .comparison-row {
        flex-direction: column;
        gap: 8px;
    }

    .comparison-arrow {
        transform: rotate(90deg);
    }

    .why-card-wide {
        grid-column: auto;
    }

    .cta-section h2 {
        font-size: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 24px;
    }

    .comparison-card,
    .feature-box,
    .why-card,
    .notification-card {
        padding: 20px;
    }

    .cta-section {
        padding: 40px 20px;
    }

    .cta-button {
        padding: 14px 24px;
        font-size: 1rem;
    }
}