/* ========== ПЕРЕМЕННЫЕ (ОРАНЖЕВАЯ ТЕМА) ========== */
:root {
    --primary: #FF6B35;
    --primary-dark: #E55A2B;
    --primary-light: #FF8A5C;
    --secondary: #FFB347;
    --accent: #FFD166;
    --dark: #2D1B0E;
    --light: #FFF8F0;
    --gray: #7A6A5C;
    --gray-light: #B8A99A;
    --success: #00D26A;
    --gradient-1: linear-gradient(135deg, #FF6B35 0%, #FFB347 100%);
    --gradient-2: linear-gradient(135deg, #FF8A5C 0%, #FFD166 100%);
    --gradient-bg: linear-gradient(135deg, #FFF5EB 0%, #FFE8D9 100%);
    --glass: rgba(255, 248, 240, 0.95);
    --glass-border: rgba(255, 107, 53, 0.2);
    --shadow: 0 20px 40px rgba(255, 107, 53, 0.15);
    --shadow-sm: 0 10px 20px rgba(255, 107, 53, 0.1);
    --glow: 0 0 20px rgba(255, 107, 53, 0.4);
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
    background: var(--gradient-bg);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== КАСТОМНЫЙ СКРОЛЛ ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #FFE8D9;
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

/* ========== КОНТЕЙНЕР ========== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========== НАВИГАЦИЯ (ВСЕГДА ВИДНА) ========== */
.navbar {
    background: var(--glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 1000;
    min-height: 70px;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
}

/* Логотип */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 12px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* КНОПКА БУРГЕР-МЕНЮ (СКРЫТА НА ДЕСКТОПЕ) */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--primary);
    cursor: pointer;
    padding: 8px 12px;
    z-index: 1001;
}

/* ДЕСКТОПНОЕ МЕНЮ */
.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-links li {
    display: inline-block;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: all 0.3s;
    padding: 8px 0;
    white-space: nowrap;
}

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

/* АВТОРИЗАЦИЯ В ХЕДЕРЕ */
.nav-auth {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.auth-link:hover {
    color: var(--primary);
}

.btn-auth {
    background: var(--gradient-1);
    color: white;
    padding: 8px 20px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

/* ========== ОСНОВНОЙ КОНТЕНТ (ОТСТУП ДЛЯ ФИКСИРОВАННОГО ХЕДЕРА) ========== */
main {
    padding-top: 80px;
}

/* ========== ГЛАВНЫЙ ЭКРАН ========== */
.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, #FFF5EB 0%, #FFE8D9 50%, #FFDDCC 100%);
    padding: 60px 20px;
}

.hero h1 {
    font-size: clamp(2rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    font-size: clamp(1rem, 3vw, 1.3rem);
    color: var(--gray);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* КНОПКИ */
.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    box-shadow: var(--glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 30px rgba(255, 107, 53, 0.5);
}

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

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-3px);
}

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

.section-title {
    text-align: center;
    font-size: clamp(1.8rem, 5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 3rem;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== КАРТОЧКИ КУРСОВ (GRID) ========== */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.course-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    transition: all 0.4s;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    height: 100%;
    display: flex;
    flex-direction: column;
}

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

.course-image {
    background: var();
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
}

.course-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.course-title {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--dark);
}

.course-description {
    color: var(--gray);
    margin-bottom: 1rem;
    flex: 1;
}

.course-price {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary);
    margin: 0.5rem 0;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    color: var(--gray);
    font-size: 0.85rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

/* ========== ПРЕИМУЩЕСТВА ========== */
.features-section {
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: var(--light);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.8rem;
    color: white;
}

/* ========== ПРЕПОДАВАТЕЛИ ========== */
.teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.teacher-card {
    text-align: center;
    background: white;
    border-radius: 24px;
    padding: 2rem;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
    height: 100%;
}

.teacher-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.teacher-avatar {
    width: 100px;
    height: 100px;
    background: var(--gradient-1);
    border-radius: 50%;
    margin: 0 auto 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: white;
}

/* Фото преподавателя */
.teacher-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 16px;
    margin-bottom: 1rem;
}

/* ========== ОТЗЫВЫ ========== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.review-card {
    background: white;
    padding: 1.5rem;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s;
    height: 100%;
}

.review-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.rating {
    color: #FFB347;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.review-text {
    color: var(--gray);
    margin-bottom: 1rem;
    font-style: italic;
}

.review-author {
    font-weight: bold;
    color: var(--dark);
}

/* ========== ФОРМА ========== */
.form-section {
    background: white;
}

.form-container {
    max-width: 550px;
    margin: 0 auto;
    background: var(--light);
    padding: 2rem;
    border-radius: 28px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 1.2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 12px 14px;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    font-size: 1rem;
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

/* ========== ПРОМО БЛОК ========== */
.promo-block {
    background: var(--gradient-1);
    border-radius: 28px;
    text-align: center;
    padding: 3rem 2rem;
    color: white;
}

.promo-block h2 {
    font-size: clamp(1.5rem, 4vw, 2rem);
    margin-bottom: 1rem;
}

.promo-block .btn-primary {
    background: white;
    color: var(--primary);
}

/* ========== ФУТЕР ========== */
.footer {
    background: var(--dark);
    color: white;
    padding: 50px 0 25px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.footer i {
    margin-right: 8px;
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* ========== АНИМАЦИИ ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========== АЛЕРТЫ ========== */
.alert {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1100;
    padding: 12px 20px;
    border-radius: 12px;
    background: white;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
    animation: slideIn 0.3s ease;
}

.alert-success {
    background: #E8F5E9;
    border-left-color: var(--success);
    color: #2E7D32;
}

/* ========== АДАПТИВ ДЛЯ ПЛАНШЕТОВ (768px - 1024px) ========== */
@media (max-width: 1024px) {
    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.9rem;
    }

    .btn-auth {
        padding: 6px 14px;
        font-size: 0.85rem;
    }
}

/* ========== АДАПТИВ ДЛЯ МОБИЛЬНЫХ (ДО 768px) ========== */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--glass);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        gap: 0;
        padding: 1rem 0;
        border-top: 1px solid var(--glass-border);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    }

    .nav-links.active {
        display: flex !important;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 12px 20px;
        white-space: nowrap;
    }

    .nav-auth {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
        padding: 10px 20px;
    }

    .hero {
        padding: 40px 16px;
    }

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

    .btn {
        width: 100%;
        max-width: 250px;
    }

    .courses-grid,
    .teachers-grid,
    .reviews-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 50px 0;
    }

    .form-container {
        padding: 1.5rem;
        margin: 0 16px;
    }
}

/* ========== АДАПТИВ ДЛЯ МАЛЕНЬКИХ ТЕЛЕФОНОВ (ДО 480px) ========== */
@media (max-width: 480px) {
    .navbar .container {
        padding: 10px 16px;
    }

    .logo {
        font-size: 1.2rem;
    }

    .logo i {
        font-size: 1.2rem;
    }

    .nav-toggle {
        font-size: 24px;
        padding: 6px 10px;
    }

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

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

    .course-title {
        font-size: 1.2rem;
    }

    .course-price {
        font-size: 1.5rem;
    }
}

/* ========== БОЛЬШИЕ ЭКРАНЫ (1440px+) ========== */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }

    .hero h1 {
        font-size: 4rem;
    }
}

/* ========== ПЛАВНОЕ ПОЯВЛЕНИЕ СЕКЦИЙ ========== */
.section {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Стиль для скролла */
.navbar.scrolled {
    background: rgba(255, 248, 240, 0.98);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Алерты на мобильных */
@media (max-width: 768px) {
    .alert {
        top: 70px;
        right: 16px;
        left: 16px;
        text-align: center;
        font-size: 0.9rem;
    }
}