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

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --white: #ffffff;
    --border-radius: 20px;
    --shadow: 0 10px 30px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--white);
    overflow-x: hidden;
}

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

/* Хедер */
.header {
    background: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent; /* Fallback для браузеров которые не поддерживают background-clip */
    font-size: 2rem;
    font-weight: 700;
}


.auth-btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 10px;
}

.login-btn {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.register-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Герой секция */
.hero {
    padding: 150px 0 100px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    margin-top: 80px;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-btn {
    padding: 15px 40px;
    background: var(--white);
    color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.cta-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
}

/* Преимущества - 4 в ряд на компьютере */
.features {
    padding: 100px 0;
    background: var(--light-bg);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Контакты */
.contact {
    padding: 100px 0;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.contact h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.telegram-btn {
    display: inline-block;
    padding: 15px 30px;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.telegram-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.2);
}

/* Футер */
.footer {
    background: var(--text-color);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.footer .logo h3 {
    background: linear-gradient(135deg, #f093fb, #667eea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: #f093fb;
    font-size: 1.5rem;
}

/* Модальные окна */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: var(--white);
    margin: 10% auto;
    padding: 2.5rem;
    border-radius: var(--border-radius);
    width: 90%;
    max-width: 400px;
    position: relative;
    box-shadow: var(--shadow);
}

.close {
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
    transition: var(--transition);
}

.close:hover {
    color: var(--text-color);
}

.modal h2 {
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-color);
}

.input-group {
    margin-bottom: 1rem;
}

.modal input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e1e5e9;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.modal input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.modal button {
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.modal button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.form-note {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 1rem;
    text-align: center;
}

.form-note p {
    margin: 0;
    font-size: 0.9rem;
    color: #856404;
}

/* Адаптивность */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .header .container {
        flex-direction: column;
        gap: 15px;
    }

    .logo h1 {
        font-size: 1.8rem;
    }

    .hero {
        padding: 120px 0 80px;
        margin-top: 120px;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1.1rem;
    }

    .features {
        padding: 60px 0;
    }

    .features h2 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .contact h2 {
        font-size: 2rem;
    }

    .modal-content {
        margin: 20% auto;
        width: 95%;
        padding: 2rem;
    }

    .auth-btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .feature-card {
        padding: 2rem 1.5rem;
    }

    .modal-content {
        padding: 1.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* Добавляем в конец файла */

/* Стили для ошибок */
.error-message {
    color: #e74c3c;
    font-size: 0.9rem;
    margin-top: 0.25rem;
    display: none;
}

.input-group.error input {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.loading {
    opacity: 0.7;
    pointer-events: none;
}

.success-message {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 1rem;
    text-align: center;
    color: #155724;
}