/* ============================================
   Базовые стили страницы
   ============================================ */
html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #0D0D1A;
    color: #FFFFFF;
}

/* ============================================
   Эффект стекла (Glass morphism)
   ============================================ */
.glass {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ============================================
   Фон hero-секции с градиентами
   ============================================ */
.hero-bg::before {
    content: "";
    position: absolute;
    overflow: hidden;
    width: 26rem;
    height: 26rem;
    right: -6rem;
    top: 2rem;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(123, 47, 190, 0.35) 0%, transparent 70%);
    filter: blur(20px);
    pointer-events: none;
}

.hero-bg::after {
    content: "";
    position: absolute;
    width: 20rem;
    height: 20rem;
    left: -6rem;
    top: 10rem;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(61, 184, 245, 0.25) 0%, transparent 70%);
    filter: blur(20px);
    pointer-events: none;
}

/* ============================================
   Эффект свечения секций
   ============================================ */
.section-glow {
    position: relative;
    overflow: hidden;
}

.section-glow .glow {
    position: absolute;
    width: 18rem;
    height: 18rem;
    border-radius: 999px;
    filter: blur(50px);
    pointer-events: none;
    opacity: .7;
}

/* ============================================
   Эффекты при наведении на карточки
   ============================================ */
.card-hover {
    transition: transform .2s ease, border-color .2s ease, background .2s ease;
}

.card-hover:hover {
    transform: translateY(-3px);
    border-color: rgba(61, 184, 245, 0.25);
    background: rgba(255, 255, 255, 0.075);
}

/* ============================================
   Карточки каналов
   ============================================ */
.channel-card {
    background:
        linear-gradient(180deg, rgba(61, 184, 245, 0.09), rgba(123, 47, 190, 0.08)),
        rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(61, 184, 245, 0.24);
    box-shadow: 0 0 40px rgba(61, 184, 245, 0.10);
}

/* ============================================
   Кнопки магазинов/платформ
   ============================================ */
.btn-store {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: background .2s ease, transform .2s ease, border-color .2s ease;
}

.btn-store:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: translateY(-1px);
    border-color: rgba(255, 255, 255, 0.18);
}

/* ============================================
   Стилизация телефона (макет)
   ============================================ */
.phone {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.03));
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 60px rgba(123, 47, 190, 0.35);
}

/* ============================================
   Бейджи каналов
   ============================================ */
.badge-channel {
    background: linear-gradient(135deg, rgba(61, 184, 245, 0.18), rgba(123, 47, 190, 0.28));
    border: 1px solid rgba(61, 184, 245, 0.28);
}

/* ============================================
   Разделитель
   ============================================ */
.divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
}

/* ============================================
   Логотипы в чипах
   ============================================ */
.logo-chip img {
    width: 18px;
    height: 18px;
    object-fit: contain;
    flex: 0 0 auto;
}

.bank-btn img,
.platform-btn img {
    width: 20px;
    height: 20px;
    object-fit: contain;
    flex: 0 0 auto;
}

/* ============================================
   Кнопка копирования ссылки
   ============================================ */
.copy-btn {
    opacity: .24;
    transition: opacity .2s ease, background .2s ease, transform .2s ease;
}

.copy-btn:hover,
.title-wrap:hover .copy-btn,
.subsection-title:hover .copy-btn {
    opacity: .9;
    transform: translateY(-1px);
}

/* ============================================
   FAQ-аккордеон
   ============================================ */
.faq-item {
    overflow: hidden;
}

.faq-trigger {
    width: 100%;
    text-align: left;
}

.faq-answer {
    height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition:
        height 360ms cubic-bezier(.4, 0, .2, 1),
        opacity 240ms ease,
        margin-top 360ms cubic-bezier(.4, 0, .2, 1);
    will-change: height, opacity, margin-top;
}

.faq-item.open .faq-answer {
    opacity: 1;
    margin-top: 1rem;
}

.faq-icon {
    transition: transform 360ms cubic-bezier(.4, 0, .2, 1), color .2s ease;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
    color: #3DB8F5;
}

/* ============================================
   Уменьшение анимаций для пользователей с предпочтениями
   ============================================ */
@media (prefers-reduced-motion: reduce) {

    .faq-answer,
    .faq-icon,
    .copy-btn,
    .btn-store,
    .card-hover {
        transition: none !important;
    }
}

/* ============================================
   Медиа-запросы для адаптивности
   ============================================ */
/* Планшеты (768px и выше) */
@media (min-width: 768px) {
    .hero-bg::before {
        width: 32rem;
        height: 32rem;
        right: -8rem;
    }

    .hero-bg::after {
        width: 24rem;
        height: 24rem;
        left: -8rem;
    }
}

/* Десктопы (1024px и выше) */
@media (min-width: 1024px) {
    .section-glow .glow {
        width: 24rem;
        height: 24rem;
    }
}

/* Большие экраны (1280px и выше) */
@media (min-width: 1280px) {
    .hero-bg::before {
        width: 40rem;
        height: 40rem;
        right: -10rem;
    }

    .hero-bg::after {
        width: 30rem;
        height: 30rem;
        left: -10rem;
    }
}

/* Мобильные устройства (максимальная ширина 640px) */
@media (max-width: 640px) {
    .hero-bg::before {
        width: 20rem;
        height: 20rem;
        right: -4rem;
        top: 1rem;
    }

    .hero-bg::after {
        width: 16rem;
        height: 16rem;
        left: -4rem;
        top: 8rem;
    }

    .phone {
        max-width: 280px;
    }
}

/* Очень маленькие экраны (максимальная ширина 480px) */
@media (max-width: 480px) {
    .hero-bg::before,
    .hero-bg::after {
        opacity: 0.5;
    }
}

/* ============================================
   Стили страницы рекламы (ad.html)
   ============================================ */

/* --- Пакеты --- */

.pkg-lermontov {
    background: rgba(61, 184, 245, 0.05);
    border: 1px solid rgba(61, 184, 245, 0.22);
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pkg-lermontov:hover {
    background: rgba(61, 184, 245, 0.11);
    border-color: rgba(61, 184, 245, 0.50);
    box-shadow: 0 0 32px rgba(61, 184, 245, 0.18);
    transform: translateY(-2px);
}

.pkg-vinsady {
    background: rgba(52, 211, 153, 0.04);
    border: 1px solid rgba(52, 211, 153, 0.18);
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pkg-vinsady:hover {
    background: rgba(52, 211, 153, 0.11);
    border-color: rgba(52, 211, 153, 0.45);
    box-shadow: 0 0 32px rgba(52, 211, 153, 0.15);
    transform: translateY(-2px);
}

.pkg-all {
    background: linear-gradient(135deg, rgba(123, 47, 190, 0.07), rgba(61, 184, 245, 0.07));
    border: 1px solid rgba(123, 47, 190, 0.28);
    box-shadow: 0 0 40px rgba(123, 47, 190, 0.10);
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.pkg-all:hover {
    background: linear-gradient(135deg, rgba(123, 47, 190, 0.14), rgba(61, 184, 245, 0.14));
    border-color: rgba(123, 47, 190, 0.55);
    box-shadow: 0 0 48px rgba(123, 47, 190, 0.22);
    transform: translateY(-2px);
}

/* --- Бейджи и теги --- */

.best-badge {
    background: linear-gradient(90deg, #7B2FBE, #3DB8F5);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    border-radius: 9999px;
    padding: 3px 10px;
    white-space: nowrap;
}

.verify-a-plus {
    background: linear-gradient(90deg, #3DB8F5, #7B2FBE);
    color: #fff;
    font-size: 9px;
    font-weight: 800;
    letter-spacing: 0.05em;
    border-radius: 4px;
    padding: 1px 5px;
    vertical-align: middle;
    display: inline-block;
}

.promo-tag {
    background: rgba(250, 204, 21, 0.10);
    border: 1px solid rgba(250, 204, 21, 0.22);
    color: #FACC15;
    border-radius: 9999px;
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    display: inline-block;
}

.subgroups-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.09);
    border-radius: 9999px;
    padding: 3px 9px;
    font-size: 11px;
    color: #B0B8CC;
    white-space: nowrap;
}

.or-sep {
    display: inline-flex;
    align-items: center;
    font-size: 10px;
    color: rgba(176, 184, 204, 0.45);
    font-weight: 600;
    letter-spacing: 0.1em;
    padding: 0 2px;
}

/* --- Канал (премиум-карточка) --- */

.channel-premium {
    background: linear-gradient(135deg, #0f1122 0%, #14112a 50%, #0e1326 100%);
    border: 1px solid rgba(61, 184, 245, 0.18);
    position: relative;
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.channel-premium::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 60% 60% at 80% 50%, rgba(123, 47, 190, 0.12), transparent),
        radial-gradient(ellipse 50% 70% at 20% 30%, rgba(61, 184, 245, 0.10), transparent);
    pointer-events: none;
}

.channel-premium:hover {
    border-color: rgba(61, 184, 245, 0.40);
    box-shadow: 0 0 56px rgba(61, 184, 245, 0.18);
}

/* --- Подгруппы: премиум-карточка с закрепом --- */

.subgroup-premium-card {
    background:
        linear-gradient(135deg, rgba(123, 47, 190, 0.13) 0%, rgba(61, 184, 245, 0.10) 100%),
        rgba(255, 255, 255, 0.05);
    border: 1.5px solid rgba(123, 47, 190, 0.45);
    box-shadow:
        0 0 0 1px rgba(123, 47, 190, 0.15),
        0 0 60px rgba(123, 47, 190, 0.20),
        0 0 120px rgba(61, 184, 245, 0.10);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
    position: relative;
}

.subgroup-premium-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 2rem;
    background: radial-gradient(ellipse 70% 50% at 80% 20%, rgba(123, 47, 190, 0.12), transparent),
        radial-gradient(ellipse 50% 60% at 20% 80%, rgba(61, 184, 245, 0.08), transparent);
    pointer-events: none;
}

.subgroup-premium-card:hover {
    border-color: rgba(123, 47, 190, 0.70);
    box-shadow:
        0 0 0 1px rgba(123, 47, 190, 0.25),
        0 0 80px rgba(123, 47, 190, 0.30),
        0 0 140px rgba(61, 184, 245, 0.14);
    transform: translateY(-3px);
}

.subgroup-premium-header {
    position: relative;
    z-index: 1;
}

.subgroup-exclusive-badge {
    background: linear-gradient(90deg, rgba(123, 47, 190, 0.35), rgba(61, 184, 245, 0.25));
    border: 1px solid rgba(123, 47, 190, 0.50);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-radius: 9999px;
    padding: 3px 10px;
    white-space: nowrap;
}

.subgroup-savings-block {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.10), rgba(52, 211, 153, 0.08));
    border: 1.5px solid rgba(52, 211, 153, 0.30);
    box-shadow: 0 0 24px rgba(52, 211, 153, 0.12);
}

/* --- Адаптивность для ad.html --- */

@media (max-width: 640px) {
    .price-big {
        font-size: 1.6rem;
    }
}