/* ===============================
   Базовые стили и переменные
   =============================== */

:root {
    /* Цветовая палитра */
    --color-white: #FFFFFF;
    --color-primary: #1E3A8A;
    --color-secondary: #06B6D4;
    --color-telegram: #0088cc;
    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-success: #10B981;
    --color-error: #EF4444;
    
    /* Градиенты */
    --gradient-primary: linear-gradient(135deg, #1E3A8A 0%, #06B6D4 100%);
    --gradient-hero: linear-gradient(135deg, rgba(30, 58, 138, 0.95) 0%, rgba(6, 182, 212, 0.95) 100%);
    
    /* Тени */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Типографика */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Анимации */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===============================
   Theme Switcher
   =============================== */

.theme-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

.theme-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-smooth);
    border: 2px solid transparent;
}

.theme-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-secondary);
}

.theme-btn i {
    font-size: 18px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===============================
   Типографика
   =============================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: 60px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

/* ===============================
   Кнопки
   =============================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.btn:hover::before {
    transform: translateX(0);
}

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

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

.btn-telegram {
    background: var(--color-telegram);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-telegram:hover {
    background: #0077b3;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-large {
    padding: 18px 40px;
    font-size: 18px;
}

.btn-submit {
    width: 100%;
    position: relative;
}

.btn-submit .btn-loader {
    display: none;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-submit.loading .btn-text {
    display: none;
}

.btn-submit.loading .btn-loader {
    display: block;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    max-width: 900px;
    padding: 40px 20px;
}

.hero-title {
    font-size: clamp(2.5rem, 7vw, 5rem);
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    margin-bottom: 16px;
    font-weight: 400;
    opacity: 0.95;
    line-height: 1.5;
}

.hero-promo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: clamp(1rem, 2.5vw, 1.3rem);
    font-weight: 600;
    margin-bottom: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: pulse 2s ease-in-out infinite;
}

.hero-promo i {
    font-size: 1.5em;
    color: #FFD700;
    animation: bounce 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.7);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 255, 255, 0);
    }
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}

/* Анимации появления */
.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Индикатор скролла */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 25px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 10px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    100% {
        opacity: 0;
        transform: translateX(-50%) translateY(15px);
    }
}

/* ===============================
   Преимущества
   =============================== */

.advantages {
    padding: 100px 0;
    background: var(--color-white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--color-white);
    border-radius: 20px;
    transition: var(--transition-smooth);
    border: 2px solid var(--color-gray-200);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-secondary);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--color-white);
}

.advantage-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.advantage-card p {
    color: var(--color-text-light);
    font-size: 1rem;
    line-height: 1.6;
}

/* ===============================
   Форматы обучения
   =============================== */

.formats {
    padding: 100px 0;
    background: var(--color-gray-100);
}

.formats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    max-width: 1000px;
    margin: 0 auto;
}

.format-card {
    background: var(--color-white);
    border-radius: 24px;
    padding: 50px 40px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-smooth);
    position: relative;
}

.format-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.format-card-featured {
    border: 3px solid var(--color-secondary);
}

.format-badge {
    position: absolute;
    top: -15px;
    right: 30px;
    background: var(--color-secondary);
    color: var(--color-white);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.format-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 30px;
    background: var(--gradient-primary);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--color-white);
}

.format-card h3 {
    font-size: 2rem;
    margin-bottom: 24px;
    text-align: center;
}

.format-features {
    list-style: none;
}

.format-features li {
    padding: 12px 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 12px;
}

.format-features li i {
    color: var(--color-success);
    font-size: 20px;
}

/* ===============================
   Для кого
   =============================== */

.for-whom {
    padding: 100px 0;
    background: var(--color-white);
}

.for-whom-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.for-whom-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: 24px;
    padding: 50px 40px;
    transition: var(--transition-smooth);
}

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

.for-whom-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 30px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--color-white);
}

.for-whom-card h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    text-align: center;
}

.for-whom-card p {
    color: var(--color-text-light);
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: 24px;
}

.for-whom-list {
    list-style: none;
    padding-left: 0;
}

.for-whom-list li {
    padding: 10px 0 10px 30px;
    position: relative;
    color: var(--color-text);
    font-weight: 500;
}

.for-whom-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
    font-size: 20px;
}

/* ===============================
   О преподавателе
   =============================== */

.about-teacher {
    padding: 100px 0;
    background: var(--color-white);
}

.about-teacher-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
    align-items: start;
    max-width: 1200px;
    margin: 0 auto;
}

.teacher-photo {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    transition: var(--transition-smooth);
}

.teacher-photo:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.teacher-photo img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    aspect-ratio: 3/4;
}

.photo-badge {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    background: rgba(30, 58, 138, 0.95);
    backdrop-filter: blur(10px);
    color: var(--color-white);
    padding: 16px 20px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
}

.photo-badge i {
    font-size: 24px;
    color: var(--color-secondary);
}

.teacher-info h3 {
    font-size: 2.5rem;
    margin-bottom: 8px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.teacher-title {
    font-size: 1.3rem;
    color: var(--color-text-light);
    margin-bottom: 24px;
    font-weight: 500;
}

.teacher-description {
    margin-bottom: 40px;
}

.teacher-description p {
    color: var(--color-text);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.teacher-achievements {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.achievement-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: var(--color-gray-100);
    border-radius: 16px;
    transition: var(--transition-smooth);
}

.achievement-item:hover {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.05) 0%, rgba(6, 182, 212, 0.05) 100%);
    transform: translateX(10px);
}

.achievement-item i {
    font-size: 32px;
    color: var(--color-primary);
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border-radius: 12px;
}

.achievement-item strong {
    display: block;
    font-size: 1.2rem;
    margin-bottom: 4px;
    color: var(--color-text);
}

.achievement-item p {
    color: var(--color-text-light);
    margin: 0;
    font-size: 0.95rem;
}

.teacher-cta {
    display: flex;
    gap: 16px;
}

/* ===============================
   Как проходят уроки
   =============================== */

.how-it-works {
    padding: 100px 0;
    background: var(--color-gray-100);
}

.steps-container {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 40px;
    margin-bottom: 60px;
    align-items: flex-start;
}

.step:last-child {
    margin-bottom: 0;
}

.step-number {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-white);
}

.step-content h3 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.step-content p {
    color: var(--color-text-light);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* ===============================
   Продающий оффер
   =============================== */

.offer {
    padding: 100px 0;
    background: var(--color-white);
    position: relative;
    overflow: hidden;
}

/* Радужный фон */
.rainbow-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        124deg,
        #ff2400, #e81d1d, #e8b71d, #e3e81d, #1de840,
        #1ddde8, #2b1de8, #dd00f3, #dd00f3
    );
    background-size: 1800% 1800%;
    animation: rainbow 18s ease infinite;
    opacity: 0.15;
    z-index: 0;
}

@keyframes rainbow {
    0% {
        background-position: 0% 82%;
    }
    50% {
        background-position: 100% 19%;
    }
    100% {
        background-position: 0% 82%;
    }
}

.offer .container {
    position: relative;
    z-index: 1;
}

.offer-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--gradient-primary);
    border-radius: 32px;
    padding: 60px 50px;
    text-align: center;
    color: var(--color-white);
    box-shadow: var(--shadow-xl);
    position: relative;
    transform-style: preserve-3d;
    transition: var(--transition-smooth);
}

.offer-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.25);
}

.offer-badge {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
    color: var(--color-text);
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 700;
    box-shadow: var(--shadow-lg);
    animation: wiggle 3s ease-in-out infinite;
}

@keyframes wiggle {
    0%, 100% {
        transform: translateX(-50%) rotate(0deg);
    }
    25% {
        transform: translateX(-50%) rotate(-3deg);
    }
    75% {
        transform: translateX(-50%) rotate(3deg);
    }
}

.offer-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 16px;
    font-weight: 800;
    color: var(--color-white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.offer-subtitle {
    font-size: 1.3rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

/* Блок цен */
.offer-price {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.price-old {
    font-size: 2rem;
    text-decoration: line-through;
    opacity: 0.6;
    font-weight: 500;
}

.price-new {
    font-size: 3.5rem;
    font-weight: 800;
    color: #FFD700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    animation: scaleUp 2s ease-in-out infinite;
}

@keyframes scaleUp {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.price-period {
    font-size: 1.5rem;
    opacity: 0.8;
    font-weight: 500;
}

.offer-benefits {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.offer-benefits li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 500;
}

.offer-benefits i {
    font-size: 24px;
    color: #FFD700;
    animation: pulse-icon 2s ease-in-out infinite;
}

@keyframes pulse-icon {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
}

/* Таймер */
.offer-timer {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 12px 24px;
    border-radius: 20px;
    margin-bottom: 30px;
    font-weight: 600;
    font-size: 1.1rem;
}

.offer-timer i {
    font-size: 1.3rem;
    color: #FFD700;
    animation: tick 1s ease-in-out infinite;
}

@keyframes tick {
    0%, 100% {
        transform: rotate(0deg);
    }
    25% {
        transform: rotate(-10deg);
    }
    75% {
        transform: rotate(10deg);
    }
}

.offer-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
}

/* ===============================
   Форма контактов
   =============================== */

.contact-form {
    padding: 100px 0;
    background: var(--color-gray-100);
}

.form-wrapper {
    max-width: 700px;
    margin: 0 auto;
    background: var(--color-white);
    border-radius: 32px;
    padding: 60px 50px;
    box-shadow: var(--shadow-xl);
}

.form-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 16px;
    font-weight: 800;
}

.form-subtitle {
    text-align: center;
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
    font-size: 1rem;
}

.required {
    color: var(--color-error);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--color-gray-200);
    border-radius: 12px;
    font-size: 16px;
    font-family: var(--font-family);
    transition: var(--transition-smooth);
    background: var(--color-white);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.form-group input.error,
.form-group textarea.error {
    border-color: var(--color-error);
}

.error-message {
    display: block;
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: 6px;
    min-height: 20px;
}

/* Radio кнопки */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-option {
    display: flex;
    align-items: center;
    padding: 16px 20px;
    border: 2px solid var(--color-gray-200);
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-smooth);
    position: relative;
}

.radio-option:hover {
    border-color: var(--color-primary);
    background: var(--color-gray-100);
}

.radio-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-custom {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-gray-300);
    border-radius: 50%;
    margin-right: 12px;
    position: relative;
    flex-shrink: 0;
    transition: var(--transition-smooth);
}

.radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-white);
    transition: var(--transition-smooth);
}

.radio-option input[type="radio"]:checked ~ .radio-custom {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.radio-option input[type="radio"]:checked ~ .radio-custom::after {
    transform: translate(-50%, -50%) scale(1);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 1rem;
}

.radio-label i {
    color: var(--color-primary);
    font-size: 20px;
}

/* Успешная отправка */
.form-success {
    display: none;
    background: var(--color-success);
    color: var(--color-white);
    padding: 24px;
    border-radius: 12px;
    text-align: center;
    margin-top: 20px;
    animation: slideIn 0.5s ease;
}

.form-success.show {
    display: block;
}

.form-success i {
    font-size: 48px;
    margin-bottom: 12px;
}

.form-success p {
    font-size: 1.1rem;
    margin: 0;
}

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

/* Разделитель */
.form-divider {
    text-align: center;
    margin: 40px 0;
    position: relative;
}

.form-divider::before,
.form-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--color-gray-300);
}

.form-divider::before {
    left: 0;
}

.form-divider::after {
    right: 0;
}

.form-divider span {
    background: var(--color-white);
    padding: 0 20px;
    color: var(--color-text-light);
    font-weight: 500;
}

/* Альтернатива Telegram */
.telegram-alternative {
    text-align: center;
}

.telegram-alternative p {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 20px;
}

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

.footer {
    background: var(--color-text);
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
    color: var(--color-white);
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--color-white);
}

.footer-section p {
    color: var(--color-gray-300);
    line-height: 1.7;
}

.footer-contacts,
.footer-links {
    list-style: none;
}

.footer-contacts li,
.footer-links li {
    margin-bottom: 12px;
}

.footer-contacts a,
.footer-links a {
    color: var(--color-gray-300);
    text-decoration: none;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contacts a:hover,
.footer-links a:hover {
    color: var(--color-secondary);
}

.footer-contacts i {
    font-size: 18px;
    width: 24px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: var(--color-gray-300);
    font-size: 0.95rem;
}

/* ===============================
   Back to Top
   =============================== */

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
    z-index: 1000;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ===============================
   Адаптивность
   =============================== */

@media (max-width: 768px) {
    .hero-promo {
        font-size: 1rem;
        padding: 12px 24px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .formats-grid {
        grid-template-columns: 1fr;
    }
    
    .for-whom-grid {
        grid-template-columns: 1fr;
    }
    
    .about-teacher-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .teacher-photo {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .teacher-achievements {
        gap: 16px;
    }
    
    .achievement-item {
        padding: 16px;
    }
    
    .achievement-item:hover {
        transform: translateX(5px);
    }
    
    .step {
        flex-direction: column;
        gap: 20px;
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .offer-card {
        padding: 50px 30px;
    }
    
    .offer-price {
        flex-direction: column;
        gap: 8px;
    }
    
    .price-new {
        font-size: 3rem;
    }
    
    .offer-benefits {
        grid-template-columns: 1fr;
    }
    
    .offer-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .offer-buttons .btn {
        width: 100%;
    }
    
    .form-wrapper {
        padding: 40px 30px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-contacts a {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .section-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .advantage-card,
    .format-card,
    .for-whom-card {
        padding: 30px 20px;
    }
    
    .teacher-info h3 {
        font-size: 2rem;
    }
    
    .teacher-title {
        font-size: 1.1rem;
    }
    
    .teacher-description p {
        font-size: 1rem;
    }
    
    .achievement-item {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .achievement-item i {
        margin: 0 auto;
    }
    
    .form-wrapper {
        padding: 30px 20px;
    }
}

/* ===============================
   Анимации при скролле
   =============================== */

[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(50px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-50px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(50px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.8);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}