/* Современные стили для Referalium.ru вдохновлённые sunchway.ru */
:root {
    --primary: #2563eb;           /* синий акцент */
    --primary-dark: #1e40af;
    --secondary: #f59e0b;         /* оранжевый акцент */
    --secondary-dark: #d97706;
    --light: #f8fafc;
    --dark: #1e293b;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    color: var(--dark);
    background-color: var(--white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--secondary);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
}

nav ul li a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition);
    padding: 8px 0;
    position: relative;
}

nav ul li a:hover {
    color: var(--primary);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

nav ul li a:hover::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark);
    cursor: pointer;
    padding: 8px;
}

/* Hero */
.hero {
    padding: 120px 0 100px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero h1 {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--dark);
    margin-bottom: 24px;
    max-width: 800px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--gray);
    max-width: 700px;
    margin-bottom: 40px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary);
    color: var(--white);
    padding: 16px 36px;
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    gap: 10px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.btn:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background-color: var(--secondary);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2);
}

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
    box-shadow: none;
}

.btn-outline:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* Sections */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 16px;
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

/* Cards */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-light);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 24px;
    color: var(--primary);
}

.card h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 16px;
}

.card p {
    color: var(--gray);
    margin-bottom: 24px;
}

.card-price {
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary);
    margin: 20px 0;
}

/* Income section */
.income-section {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: var(--white);
    padding: 80px 0;
    border-radius: var(--radius);
    text-align: center;
}

.income-section h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 24px;
}

.income-section p {
    font-size: 1.125rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto 40px;
}

/* Form */
.form-section {
    background-color: var(--light);
    padding: 80px 0;
    border-radius: var(--radius);
}

.form-section h2 {
    text-align: center;
    margin-bottom: 16px;
}

.form-section > p {
    text-align: center;
    color: var(--gray);
    margin-bottom: 48px;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--white);
    padding: 48px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--dark);
}

.form-group input {
    width: 100%;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-light);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    background-color: var(--white);
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Footer */
footer {
    background-color: var(--dark);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 60px;
}

.footer-column h3 {
    font-size: 1.25rem;
    margin-bottom: 24px;
    color: var(--white);
}

.footer-column p {
    color: #cbd5e1;
    line-height: 1.7;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-column ul li a:hover {
    color: var(--white);
    transform: translateX(5px);
}

.copyright {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #94a3b8;
    font-size: 0.9rem;
}

/* Blog */
.blog-post {
    background: var(--white);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.blog-post h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.blog-post h3 a {
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition);
}

.blog-post h3 a:hover {
    color: var(--primary);
}

.post-date {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Post page */
.post-header {
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: var(--white);
    padding: 100px 0;
    text-align: center;
    border-radius: 0 0 var(--radius) var(--radius);
}

.post-header h1 {
    font-size: 3rem;
    margin-bottom: 16px;
}

.post-content {
    max-width: 800px;
    margin: 80px auto;
    font-size: 1.125rem;
    line-height: 1.8;
}

.post-content h2 {
    font-size: 2rem;
    margin: 48px 0 24px;
    color: var(--dark);
}

.post-content ul {
    margin: 24px 0;
    padding-left: 24px;
}

.post-content li {
    margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .cards-container {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-container {
        flex-direction: row;
        align-items: center;
        padding: 16px 0;
        min-height: 70px;
        position: relative;
    }
    
    .mobile-menu-btn {
        display: block;
        position: absolute;
        top: 50%;
        right: 24px;
        transform: translateY(-50%);
        z-index: 1001;
    }
    
    nav ul {
        flex-direction: column;
        gap: 0;
        width: 100%;
        margin-top: 0;
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        background-color: var(--white);
        box-shadow: var(--shadow-lg);
        border-radius: 0 0 var(--radius) var(--radius);
        z-index: 1000;
        padding: 0;
    }
    
    nav ul.active,
    nav.active ul {
        display: flex;
    }
    
    nav ul li {
        margin: 0;
        border-bottom: 1px solid var(--gray-light);
        width: 100%;
    }
    
    nav ul li:last-child {
        border-bottom: none;
    }
    
    nav ul li a {
        display: block;
        padding: 16px 24px;
        width: 100%;
    }
    
    nav ul li a.btn {
        margin: 16px 24px;
        width: calc(100% - 48px);
        text-align: center;
        border-radius: var(--radius);
    }
    
    .hero {
        padding: 80px 0 60px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    section {
        padding: 60px 0;
    }
    
    .form-container {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 14px 28px;
        width: 100%;
    }
    
    .card {
        padding: 32px 24px;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
    }
}