/* ==========================================================================
   1. СБРОС СТИЛЕЙ И ГЛОБАЛЬНЫЕ ПЕРЕМЕННЫЕ
   ========================================================================== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-main: #0f172a;        /* Глубокий тёмный фон */
    --bg-surface: #1e293b;     /* Фон карточек и панелей */
    --bg-surface-glass: rgba(30, 41, 59, 0.7);
    --primary: #10b981;        /* Неоновый изумрудный акцент */
    --primary-hover: #059669;  
    --secondary: #64748b;      /* Спокойный серый */
    --secondary-hover: #475569;
    --text-main: #f8fafc;     /* Белый текст */
    --text-muted: #94a3b8;    /* Приглушенный текст */
    --border-color: #334155;   /* Границы */
    --error: #f43f5e;          /* Коралловый красный */
    --success: #10b981;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    --shadow-neon: 0 0 20px rgba(16, 185, 129, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   2. КОМПОНЕНТЫ КНОПОК И ИНТЕРФЕЙСА
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #06b6d4);
    color: #0f172a;
    box-shadow: var(--shadow-neon);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
    border-color: var(--text-muted);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
}

/* Названия секций */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.03em;
    background: linear-gradient(to right, #fff, var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

/* Алероты и уведомления */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    font-weight: 500;
    border-left: 4px solid transparent;
}

.alert-error {
    background-color: rgba(244, 63, 94, 0.1);
    color: #fda4af;
    border-color: var(--error);
}

.alert-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #a7f3d0;
    border-color: var(--success);
}

/* ==========================================================================
   3. НАВИГАЦИЯ (HEADER)
   ========================================================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--bg-surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.header__logo-img {
    height: 40px;
    filter: drop-shadow(var(--shadow-neon));
}

.header__logo-text {
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
    background: linear-gradient(45deg, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.header__nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-muted);
    position: relative;
    padding: 8px 0;
}

.header__nav-link:hover, 
.header__nav-link.active {
    color: var(--text-main);
}

.header__nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: var(--transition);
}

.header__nav-link:hover::after,
.header__nav-link.active::after {
    width: 100%;
}

.header__nav-link--special {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--primary) !important;
    padding: 8px 20px;
    border-radius: 30px;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.header__nav-link--special:hover {
    background-color: var(--primary);
    color: #0f172a !important;
    box-shadow: var(--shadow-neon);
}

.header__nav-link--special::after { display: none; }

.header__burger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.header__burger span {
    width: 24px;
    height: 2px;
    background-color: var(--text-main);
    transition: var(--transition);
}

/* ==========================================================================
   4. ГЛАВНЫЙ ЭКРАН (HERO)
   ========================================================================== */
.hero {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 70%);
    z-index: -1;
}

.hero__container {
    display: grid;
    grid-template-columns: 1.2sfr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero__title {
    font-size: 3.5rem;
    line-height: 1.15;
    font-weight: 800;
    margin-bottom: 24px;
    letter-spacing: -0.04em;
}

.hero__title span {
    background: linear-gradient(to right, var(--primary), #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 40px;
    max-width: 580px;
}

.hero__buttons {
    display: flex;
    gap: 16px;
}

.hero__image img {
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    border: 1px solid var(--border-color);
}

/* ==========================================================================
   5. КУРСЫ (COURSES) И ГАЛЕРЕЯ
   ========================================================================== */
.courses-overview {
    padding: 100px 0;
    background-color: rgba(30, 41, 59, 0.3);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.course-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
}

.course-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.course-card__icon {
    font-size: 2.5rem;
    margin-bottom: 24px;
    background: rgba(255, 255, 255, 0.05);
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.course-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    font-weight: 600;
}

.course-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
    height: 72px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-card__link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.course-card__link:hover {
    color: #fff;
}

/* ==========================================================================
   6. СЛАЙДЕР (SLIDER)
   ========================================================================== */
.slider-section {
    padding: 100px 0;
}

.slider {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.slider__wrapper {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.slider__slide {
    min-width: 100%;
    position: relative;
}

.slider__slide img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.slider__btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    color: white;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}

.slider__btn:hover {
    background: var(--primary);
    color: #0f172a;
    border-color: var(--primary);
}

.slider__btn--prev { left: 24px; }
.slider__btn--next { right: 24px; }

.slider__dots {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.slider__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

.slider__dot--active {
    background: var(--primary);
    width: 28px;
    border-radius: 5px;
}

/* Компактный слайдер в Личном кабинете */
.slider-section--compact .slider__slide img {
    height: 300px;
}

/* ==========================================================================
   7. ПРОМО-БАННЕРЫ И ОТЗЫВЫ
   ========================================================================== */
.banner-promo {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1) 0%, rgba(6, 182, 212, 0.05) 100%);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.banner-promo .container {
    display: flex;
    align-items: center;
    gap: 48px;
}

.banner-promo__icon {
    font-size: 4rem;
    background: var(--bg-surface);
    width: 110px;
    height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 2px solid var(--primary);
    box-shadow: var(--shadow-neon);
}

.banner-promo__content h2 {
    font-size: 2rem;
    margin-bottom: 16px;
}

.banner-promo__content p {
    color: var(--text-muted);
    margin-bottom: 32px;
    max-width: 800px;
}

.banner-secondary {
    padding: 100px 0;
}

.banner-secondary .container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.banner-secondary__img {
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.banner-secondary__content h2 {
    font-size: 2.2rem;
    margin-bottom: 24px;
}

.banner-secondary__content p {
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Блок отзывов/студентов */
.gallery-section {
    padding: 100px 0;
    background-color: rgba(30, 41, 59, 0.2);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.gallery-item {
    background-color: var(--bg-surface);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.gallery-item__image {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
}

.gallery-item__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 3px solid var(--primary);
}

.gallery-item__name {
    font-weight: 600;
    font-size: 1.15rem;
    margin-bottom: 4px;
}

.gallery-item__role {
    font-size: 0.9rem;
    color: var(--primary);
}

/* ==========================================================================
   8. СТРАНИЦЫ АВТОРИЗАЦИИ И РЕГИСТРАЦИИ (AUTH)
   ========================================================================== */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 40px 20px;
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
}

.auth-container {
    width: 100%;
    max-width: 500px;
}

.auth-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.auth-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 32px;
}

.auth-logo img {
    height: 50px;
    filter: drop-shadow(var(--shadow-neon));
}

.auth-card h1 {
    font-size: 1.8rem;
    text-align: center;
    margin-bottom: 32px;
    font-weight: 700;
}

/* Формы */
.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

/* Ошибки валидации */
.form-group.has-error input,
.form-group.has-error select {
    border-color: var(--error);
}

.form-error {
    display: block;
    margin-top: 6px;
    font-size: 0.8rem;
    color: #f87171;
}

.auth-link {
    text-align: center;
    margin-top: 28px;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.auth-link a {
    color: var(--primary);
    font-weight: 600;
}

/* ==========================================================================
   9. ЛИЧНЫЙ КАБИНЕТ И ПАНЕЛЬ АДМИНИСТРАТОРА
   ========================================================================== */
.profile-page, .admin-page, .application-page {
    padding: 60px 0 100px;
}

.profile-page h1, .admin-page h1, .application-page h1 {
    font-size: 2.2rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.profile-welcome {
    color: var(--text-muted);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.applications-section, .reviews-section, .filters {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    margin-top: 40px;
}

.applications-section h2, .reviews-section h2 {
    font-size: 1.5rem;
    margin-bottom: 24px;
    font-weight: 600;
}

/* Таблицы */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.table th {
    background-color: rgba(15, 23, 42, 0.4);
    padding: 16px;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.table tbody tr:hover {
    background-color: rgba(255,255,255,0.02);
}

/* Статусы-баджи */
.status-badge {
    display: inline-flex;
    padding: 6px 12px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-badge--новая {
    background-color: rgba(6, 182, 212, 0.15);
    color: #22d3ee;
}

.status-badge--идет-обучение {
    background-color: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.status-badge--обучение-завершено {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

/* Фильтры админки */
.filters__form {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.filters__form select {
    flex: 1;
    min-width: 200px;
    background-color: var(--bg-main);
}

/* Пагинация */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.pagination__link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    font-weight: 500;
}

.pagination__link:hover,
.pagination__link--active {
    background-color: var(--primary);
    color: #0f172a;
    border-color: var(--primary);
}

/* Отзывы в профиле */
.reviews-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.review-card {
    background-color: rgba(15, 23, 42, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 24px;
}

.review-card h4 {
    margin-bottom: 8px;
    color: var(--primary);
}

.review-date {
    display: block;
    margin-top: 12px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Модальные окна */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    z-index: 2000;
}

.modal.is-open {
    opacity: 1;
    pointer-events: auto;
}

.modal__content {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    width: 100%;
    max-width: 550px;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal.is-open .modal__content {
    transform: scale(1);
}

.modal__close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-muted);
    line-height: 1;
}

.modal__close:hover {
    color: #fff;
}

/* Подвал (Footer) */
.footer {
    background-color: #020617;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
    text-align: center;
}

.footer p {
    margin-bottom: 8px;
}

/* ==========================================================================
   10. АДАПТИВНОСТЬ (RESPONSIVE)
   ========================================================================== */
@media (max-width: 992px) {
    .hero__container, .banner-secondary .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    .hero__buttons {
        justify-content: center;
    }
    .hero__image, .banner-secondary__img {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }
    .hero__title {
        font-size: 2.8rem;
    }
    .banner-promo .container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .header__nav {
        display: none; /* Для реализации мобильного меню на JS */
    }
    .header__burger {
        display: flex;
    }
    .section-title {
        font-size: 2rem;
    }
    .auth-card {
        padding: 24px;
    }
}