/* === Переменные темы === */
:root {
    --red:         #e63946;
    --red-light:   #ff6b6b;
    --red-dark:    #c1121f;
    --red-bg:      rgba(230, 57, 70, 0.15);
    --red-glow:    rgba(230, 57, 70, 0.3);

    --bg:          #0d0d0d;
    --bg-darker:   #080808;
    --card:        #141414;
    --card-hover:  #1a1a1a;
    --elevated:    #1e1e1e;
    --input-bg:    #1a1a1a;

    --text:        #ffffff;
    --text-sec:    #b0b0b0;
    --text-muted:  #666666;

    --border:      #2a2a2a;
    --border-lt:   #3a3a3a;

    --success:     #22c55e;
    --warning:     #f59e0b;
    --danger:      #ef4444;
    --info:        #3b82f6;

    --radius-sm:   8px;
    --radius-md:   12px;
    --radius-lg:   16px;
    --radius-xl:   24px;
    --radius-full: 9999px;

    --transition:  all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Базовые стили === */
*, *::before, *::after { box-sizing: border-box; }

html, body {
    background-color: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100%;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Raleway', sans-serif;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

a { color: var(--red); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--red-light); }

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-lt); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--red); }

::selection { background: var(--red); color: #fff; }

/* === Навбар === */
.site-navbar {
    background: rgba(13, 13, 13, 0.92) !important;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 300;
}

.logo { max-width: 160px; }
.logo img { filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3)); transition: var(--transition); }
.logo img:hover { filter: drop-shadow(0 2px 12px var(--red-glow)); transform: translateY(-1px); }

.nav-link-item {
    color: var(--text-sec);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}
.nav-link-item:hover {
    color: var(--text);
    background: var(--red-bg);
}

.profile-avatar { max-width: 40px; cursor: pointer; }
.profile-avatar img { border: 2px solid var(--border-lt); transition: var(--transition); }
.profile-avatar img:hover { border-color: var(--red); }

/* === Dropdown === */
.site-dropdown {
    background: var(--card) !important;
    border: 1px solid var(--border-lt) !important;
    border-radius: var(--radius-md) !important;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.site-dropdown .dropdown-item {
    color: var(--text-sec);
    transition: var(--transition);
    font-size: 0.9rem;
}
.site-dropdown .dropdown-item:hover { background: var(--red-bg); color: var(--text); }
.site-dropdown .dropdown-divider { border-color: var(--border); }
.site-dropdown .dropdown-item-text { color: var(--text-muted); }

/* === Кнопки === */
.btn-primary-red {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    box-shadow: 0 4px 15px var(--red-glow);
}
.btn-primary-red:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--red-glow);
}

/* Bootstrap переопределения */
.btn-dark, .btn-dark:focus {
    background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%) !important;
    border: none !important;
    color: #fff !important;
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 4px 15px var(--red-glow);
}
.btn-dark:hover {
    background: linear-gradient(135deg, var(--red-light) 0%, var(--red) 100%) !important;
    color: #fff !important;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--red-glow);
}

.btn-outline-light {
    border-color: var(--border-lt) !important;
    color: var(--text-sec) !important;
    border-radius: var(--radius-md);
    transition: var(--transition);
}
.btn-outline-light:hover {
    border-color: var(--red) !important;
    background: var(--red-bg) !important;
    color: var(--text) !important;
}

/* === Alerts === */
.site-alert {
    border: none;
    border-left: 4px solid;
}
.alert-success { background: rgba(34, 197, 94, 0.15) !important; border-left-color: var(--success); color: var(--text) !important; }
.alert-danger  { background: rgba(239, 68, 68, 0.15) !important; border-left-color: var(--danger); color: var(--text) !important; }
.alert-warning { background: rgba(245, 158, 11, 0.15) !important; border-left-color: var(--warning); color: var(--text) !important; }
.alert-info    { background: rgba(59, 130, 246, 0.15) !important; border-left-color: var(--info); color: var(--text) !important; }
.btn-close-white { filter: invert(1); }

/* === Bootstrap card override === */
.card {
    background: var(--card) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-md) !important;
    color: var(--text) !important;
}
.card-header {
    background: var(--elevated) !important;
    border-bottom: 1px solid var(--border) !important;
    color: var(--text) !important;
}
.card-body { color: var(--text-sec) !important; }
.card-text { color: var(--text-sec); }

/* === Формы === */
.form-control, .form-select {
    background: var(--input-bg) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-md) !important;
    color: var(--text) !important;
    font-size: 0.9rem;
    padding: 0.7rem 1rem;
    transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    background: var(--input-bg) !important;
    border-color: var(--red) !important;
    box-shadow: 0 0 0 3px var(--red-bg) !important;
    color: var(--text) !important;
    outline: none;
}
.form-control::placeholder { color: var(--text-muted); }
.form-select option { background: var(--card); color: var(--text); }
label { color: var(--text-sec); font-size: 0.9rem; margin-bottom: 0.4rem; display: block; }

/* === Главная страница === */
.hero-section {
    min-height: calc(100vh - 70px);
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 1rem;
    position: relative;
}
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(230,57,70,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: linear-gradient(135deg, #fff 0%, var(--text-sec) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
}
.hero-desc {
    color: var(--text-sec);
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.05rem;
}
.hero-search {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* === Заголовок курса (hero) === */
.title-area {
    background-color: var(--bg-darker);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    color: var(--text);
    font-size: 1.1rem;
    min-height: calc(65vh);
}
.title-area h1 { font-size: clamp(1.8rem, 4vw, 3rem); }
.title-area p { color: rgba(255,255,255,0.85); }

/* === Список курсов === */
.courses-list .row {
    background: var(--card) !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    cursor: pointer;
    margin-bottom: 1rem;
    padding: 1rem;
}
.courses-list .row:hover {
    border-color: var(--red) !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.courses-list h4 { color: var(--text); }
.courses-list .text-muted { color: var(--text-muted) !important; }

.course-logo {
    min-width: 160px;
    width: 100%;
    height: 160px;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    border-radius: var(--radius-md);
}

.rating { color: var(--red); font-weight: 600; white-space: nowrap; }

/* === Фоновый preview === */
.background-preview {
    border: 2px dashed var(--border-lt);
    border-radius: var(--radius-md);
    flex-grow: 1;
    background: var(--input-bg);
    min-height: 200px;
}

/* === Пагинация === */
.pagination { gap: 0.4rem; }
.page-link {
    background: var(--card) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-sec) !important;
    border-radius: var(--radius-md) !important;
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    transition: var(--transition);
}
.page-link:hover {
    border-color: var(--red) !important;
    color: var(--red) !important;
    background: var(--card) !important;
}
.page-item.active .page-link {
    background: var(--red-bg) !important;
    border-color: var(--red) !important;
    color: var(--red) !important;
    font-weight: 600;
}
.page-item.disabled .page-link { opacity: 0.4; }

/* === Отзывы === */
.review-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    transition: var(--transition);
    margin-bottom: 1rem;
}
.review-card:hover { border-color: var(--border-lt); }

.review-stars { color: var(--red); letter-spacing: 2px; font-size: 1rem; }
.review-author { color: var(--text); font-weight: 600; font-size: 0.95rem; }
.review-date { color: var(--text-muted); font-size: 0.8rem; }
.review-text { color: var(--text-sec); margin-top: 0.5rem; line-height: 1.6; }

.review-form-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}
.review-form-card h5 { color: var(--text); font-family: 'Raleway', sans-serif; margin-bottom: 1rem; }

.section-divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2rem 0;
}

/* === Секции курса === */
.course-section {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
}
.course-section h2 {
    font-size: 1.4rem;
    color: var(--text);
    margin-bottom: 1.2rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* === Бейдж рейтинга === */
.rating-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--red-bg);
    color: var(--red);
    border-radius: var(--radius-full);
    padding: 0.25rem 0.75rem;
    font-weight: 700;
    font-size: 0.95rem;
}

/* === Footer === */
.site-footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border);
    padding: 1.75rem 0 1.25rem;
    margin-top: auto;
}
.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1rem;
}
.footer-logo { opacity: 0.75; }
.footer-info .footer-name {
    color: var(--text);
    font-weight: 600;
    font-size: 0.9rem;
}
.footer-info .footer-group {
    color: var(--text-muted);
    font-size: 0.8rem;
}
.footer-links { display: flex; gap: 1rem; align-items: center; }
.footer-links a {
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: var(--transition);
    text-decoration: none;
}
.footer-links a:hover {
    color: var(--red);
    transform: translateY(-2px);
    text-shadow: 0 0 10px var(--red-glow);
}
.footer-copy { color: var(--text-muted); font-size: 0.8rem; text-align: center; }

/* === Адаптивность === */
@media (max-width: 768px) {
    .footer-content { flex-direction: column; text-align: center; }
    .footer-links { justify-content: center; }
    .footer-logo { display: none; }
    .hero-section { padding: 2rem 1rem; }
    .course-logo { height: 120px; }
    .courses-list .row { flex-direction: column; }
}