/* ============================================
   SpotifyRu Store — Premium Subscription Landing
   ============================================ */

:root {
    /* Color Palette — Neutral Dark Blue Theme */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-card: #1c2128;
    --bg-card-hover: #252c35;
    --bg-elevated: #2d333b;
    
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    --accent-primary: #58a6ff;
    --accent-secondary: #388bfd;
    --accent-glow: rgba(88, 166, 255, 0.25);
    --accent-subtle: rgba(88, 166, 255, 0.1);
    
    /* Цвета флага России для специальных элементов */
    --russia-white: #FFFFFF;
    --russia-blue: #0039A6;
    --russia-red: #D52B1E;
    
    --gradient-hero: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #0d1117 100%);
    --gradient-card: linear-gradient(180deg, rgba(88, 166, 255, 0.05) 0%, transparent 100%);
    --gradient-accent: linear-gradient(135deg, #58a6ff 0%, #388bfd 100%);
    --gradient-text: linear-gradient(90deg, #f0f6fc 0%, #58a6ff 50%, #f0f6fc 100%);
    --gradient-russia: linear-gradient(180deg, #FFFFFF 0%, #0039A6 50%, #D52B1E 100%);
    
    --border-subtle: rgba(139, 148, 158, 0.15);
    --border-active: rgba(88, 166, 255, 0.4);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(88, 166, 255, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
    
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --font-display: 'Unbounded', sans-serif;
    --font-body: 'Onest', sans-serif;
    
    --container-width: 1200px;
    --header-height: 80px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

/* Container */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ============================================
   Typography
   ============================================ */

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-text);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s linear infinite;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

@keyframes shimmer {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--gradient-accent);
    color: var(--bg-primary);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

.btn--secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn--secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-active);
}

.btn--ghost {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.btn--ghost:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn--lg {
    padding: 18px 36px;
    font-size: 1.125rem;
}

.btn--full {
    width: 100%;
}

/* ============================================
   Header
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo__icon {
    color: var(--accent-primary);
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-svg {
    width: 32px;
    height: 32px;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.1); }
}

.nav {
    display: flex;
    gap: 40px;
}

.nav__link {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

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

.nav__link:hover::after {
    width: 100%;
}

.header__cta {
    padding: 12px 24px;
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.burger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    padding: 24px;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
    border-bottom: 1px solid var(--border-subtle);
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu__nav {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mobile-menu__link {
    font-size: 1.125rem;
    color: var(--text-secondary);
    padding: 8px 0;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--header-height);
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    z-index: -1;
}

.hero__orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 20s ease-in-out infinite;
}

.hero__orb--1 {
    width: 600px;
    height: 600px;
    background: var(--russia-blue);
    top: -20%;
    right: -10%;
    animation-delay: 0s;
}

.hero__orb--2 {
    width: 400px;
    height: 400px;
    background: var(--russia-red);
    bottom: -10%;
    left: -5%;
    animation-delay: -7s;
}

.hero__orb--3 {
    width: 300px;
    height: 300px;
    background: var(--accent-primary);
    top: 50%;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(-30px, -10px) scale(1.02); }
}

.hero__inner {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--accent-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 100px;
    font-size: 0.875rem;
    color: var(--accent-primary);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease backwards;
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero__title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 6rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease backwards 0.1s;
}

.hero__title-accent {
    background: var(--gradient-text);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s linear infinite;
}

.hero__subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease backwards 0.2s;
}

.hero__actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 80px;
    animation: fadeInUp 0.6s ease backwards 0.3s;
}

.hero__stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease backwards 0.4s;
}

.hero__stat {
    text-align: center;
}

.hero__stat-value {
    display: block;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 4px;
}

.hero__stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================
   Tariffs Section
   ============================================ */

.tariffs {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.tariff-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.tariff-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.tariff-tab:hover {
    border-color: var(--border-active);
    color: var(--text-primary);
}

.tariff-tab.active {
    background: var(--accent-subtle);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.tariff-tab__icon {
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tariff-tab__icon svg {
    width: 20px;
    height: 20px;
}

.tariff-content {
    display: none;
}

.tariff-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.tariff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.tariff-grid--centered {
    max-width: 600px;
    margin: 0 auto;
}

/* Tariff Card */
.tariff-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 32px;
    position: relative;
    transition: all var(--transition-base);
}

.tariff-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tariff-card:hover {
    border-color: var(--border-active);
    transform: translateY(-4px);
}

.tariff-card:hover::before {
    opacity: 1;
}

.tariff-card--featured {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.tariff-card--featured::before {
    opacity: 1;
}

.tariff-card__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-accent);
    color: var(--bg-primary);
    padding: 6px 20px;
    border-radius: 100px;
    font-size: 0.8125rem;
    font-weight: 600;
    white-space: nowrap;
}

.tariff-card__header {
    margin-bottom: 24px;
}

.tariff-card__label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-primary);
    margin-bottom: 8px;
}

.tariff-card__name {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
}

.tariff-card__features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 32px;
}

.tariff-card__features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 32px;
}

.tariff-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.tariff-feature::before {
    content: '';
    width: 20px;
    height: 20px;
    border-radius: 50%;
    flex-shrink: 0;
}

.tariff-feature--yes::before {
    background: var(--accent-subtle);
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M2 6L5 9L10 3' stroke='%2300ff88' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

.tariff-feature--no::before {
    background: rgba(255, 100, 100, 0.1);
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M3 3L9 9M9 3L3 9' stroke='%23ff6464' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

.tariff-feature--no {
    color: var(--text-muted);
}

.tariff-card__pricing {
    margin-bottom: 16px;
}

.tariff-period {
    display: none;
    flex-direction: column;
    text-align: center;
}

.tariff-period.active {
    display: flex;
}

.tariff-price {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.tariff-duration {
    font-size: 0.9375rem;
    color: var(--text-muted);
}

.tariff-installment {
    font-size: 0.875rem;
    color: var(--accent-secondary);
    margin-top: 4px;
}

.tariff-periods-select {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.period-btn {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.period-btn:hover:not(.disabled) {
    border-color: var(--border-active);
    color: var(--text-primary);
}

.period-btn.active {
    background: var(--accent-subtle);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.period-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tariff-card__desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 24px;
}

.tariff-card--gift {
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(255, 200, 100, 0.05) 100%);
}

/* ============================================
   How It Works Section
   ============================================ */

.how {
    padding: 120px 0;
    background: var(--bg-primary);
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, transparent 0%, var(--border-subtle) 20%, var(--border-subtle) 80%, transparent 100%);
    z-index: 0;
}

.step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.step__number {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.step__title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step__desc {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ============================================
   About Section
   ============================================ */

.about {
    padding: 120px 0;
    background: var(--bg-secondary);
}

.about__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about__content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about__text {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 20px;
}

.about__text strong {
    color: var(--accent-primary);
}

.about__btn {
    margin-top: 16px;
}

.about__visual {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about__card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.about__card:hover {
    border-color: var(--border-active);
    transform: translateX(8px);
}

.about__card-icon {
    font-size: 2.5rem;
}

.about__card-value {
    display: block;
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.about__card-label {
    font-size: 0.9375rem;
    color: var(--text-muted);
}

/* ============================================
   FAQ Section
   ============================================ */

.faq {
    padding: 120px 0;
    background: var(--bg-primary);
}

.faq__list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq__item {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--transition-base);
}

.faq__item:hover {
    border-color: var(--border-active);
}

.faq__item.active {
    border-color: var(--accent-primary);
}

.faq__question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 24px;
    text-align: left;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--text-primary);
}

.faq__icon {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
}

.faq__icon::before,
.faq__icon::after {
    content: '';
    position: absolute;
    background: var(--accent-primary);
    transition: transform var(--transition-base);
}

.faq__icon::before {
    width: 100%;
    height: 2px;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}

.faq__icon::after {
    width: 2px;
    height: 100%;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
}

.faq__item.active .faq__icon::after {
    transform: translateX(-50%) rotate(90deg);
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq__item.active .faq__answer {
    max-height: 300px;
}

.faq__answer p {
    padding: 0 24px 24px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ============================================
   Modal
   ============================================ */

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal__container {
    position: relative;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    margin: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    padding: 32px;
    overflow-y: auto;
    transform: translateY(20px);
    transition: transform var(--transition-base);
}

.modal.active .modal__container {
    transform: translateY(0);
}

.modal__close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--text-muted);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.modal__close:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
}

.modal__header {
    margin-bottom: 32px;
}

.modal__title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.modal__plan {
    color: var(--accent-primary);
    font-size: 0.9375rem;
}

/* Order Form */
.order-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    padding: 14px 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-subtle);
}

.form-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.payment-methods {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.payment-method-single {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--accent-subtle);
    border: 1px solid var(--accent-primary);
    border-radius: var(--radius-md);
}

.payment-method-single .payment-method__icon {
    font-size: 1.5rem;
}

.payment-method-single .payment-method__text {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.payment-method {
    cursor: pointer;
}

.payment-method input {
    display: none;
}

.payment-method__box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.payment-method input:checked + .payment-method__box {
    border-color: var(--accent-primary);
    background: var(--accent-subtle);
}

.payment-method__icon {
    font-size: 1.5rem;
}

.payment-method__text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-top: 1px solid var(--border-subtle);
    font-size: 1.125rem;
}

.form-total__price {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.form-agreement {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
}

.form-agreement a {
    color: var(--text-secondary);
    text-decoration: underline;
}

.form-agreement a:hover {
    color: var(--accent-primary);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    padding: 60px 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
}

.footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
}

.footer__brand {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer__brand .logo {
    justify-content: center;
}

.footer__desc {
    color: var(--text-muted);
    font-size: 0.9375rem;
    margin-top: 8px;
    text-align: center;
}

.footer__links {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

.footer__links a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--accent-primary);
}

.footer__copy {
    color: var(--text-muted);
    font-size: 0.8125rem;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1024px) {
    .about__inner {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .about__content .section-title {
        text-align: center;
    }
    
    .about__content {
        text-align: center;
    }
    
    .about__btn {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 70px;
    }
    
    .nav, .header__cta {
        display: none;
    }
    
    .burger {
        display: flex;
    }
    
    .hero__stats {
        gap: 32px;
    }
    
    .hero__stat-value {
        font-size: 1.5rem;
    }
    
    .steps::before {
        display: none;
    }
    
    .tariff-card__features-grid {
        grid-template-columns: 1fr;
    }
    
    .tariff-periods-select {
        flex-wrap: wrap;
    }
    
    .period-btn {
        flex: 1 1 calc(50% - 4px);
    }
    
    .about__visual {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .about__card {
        flex: 1 1 calc(50% - 10px);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero__actions {
        flex-direction: column;
        gap: 12px;
    }
    
    .hero__actions .btn {
        width: 100%;
    }
    
    .tariff-card {
        padding: 24px;
    }
    
    .about__card {
        flex: 1 1 100%;
    }
    
    .payment-methods {
        grid-template-columns: 1fr;
    }
}