/* ====================
    1. ГЛОБАЛЬНЫЕ СТИЛИ И ПЕРЕМЕННЫЕ
    ==================== */
:root {
    --primary-color: #00A99D;
    --primary-glow: rgba(0, 169, 157, 0.5);
    --dark-bg: #020409;
    --secondary-bg: #0D1117;
    --light-bg: #F9FAFB;
    --text-light: #E6EDF3;
    --text-mid: #8B949E;
    --text-dark: #1F2937;
    --border-color: rgba(139, 148, 158, 0.2);
    --white-color: #ffffff;
    --font-heading: 'Exo 2', sans-serif;
    --font-body: 'Inter', sans-serif;
    --container-width: 1200px;
    --radius: 12px;
    --transition-speed: 0.4s;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--text-dark);
    background: linear-gradient(180deg, #020409 0%, #0D1117 50%, #020409 100%);
    line-height: 1.65;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top, rgba(102, 126, 234, 0.1), transparent 70%),
                radial-gradient(ellipse at bottom, rgba(0, 169, 157, 0.1), transparent 70%);
    pointer-events: none;
    z-index: 0;
}

* {
    box-sizing: border-box;
}

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

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-light);
    margin-top: 0;
}

h1 { font-size: clamp(2.8rem, 6vw, 4.5rem); margin-bottom: 1.5rem; }
h2 { font-size: clamp(2.2rem, 5vw, 3.5rem); margin-bottom: 1.5rem; text-align: center; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
h4 { font-family: var(--font-body); font-weight: 700; font-size: 1.2rem; }

.section-subtitle {
    text-align: center;
    font-size: 1.4rem;
    max-width: 700px;
    margin: 2rem auto 4rem auto;
    color: var(--white-color);
}

.reveal-custom .section-subtitle {
    color: var(--primary-color);
    font-size: 2.4rem;
    margin-top: 60px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

section {
    padding: 120px 0;
    overflow: hidden;
    position: relative;
}

.btn {
    display: inline-block;
    padding: 16px 40px;
    background: var(--primary-color);
    color: var(--white-color);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1rem;
    transition: all var(--transition-speed) ease;
    border: 1px solid var(--primary-color);
    cursor: pointer;
    box-shadow: 0 0 20px var(--primary-glow);
}

.btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 30px var(--primary-glow);
}

/* ====================
    2. АНИМАЦИИ
    ==================== */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 1s cubic-bezier(0.165, 0.84, 0.44, 1), transform 1s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ====================
    3. ШАПКА
    ==================== */
.header {
    background: linear-gradient(180deg, rgba(44, 44, 44, 0.95) 0%, rgba(30, 30, 30, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 12px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: all var(--transition-speed) ease;
}

.header.scrolled {
        background: linear-gradient(180deg, rgba(13, 17, 23, 0.98) 0%, rgba(2, 4, 9, 0.95) 100%);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        padding: 8px 0;
        border-bottom: 1px solid var(--border-color);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-logo img {
    height: 60px;
    transition: height var(--transition-speed) ease;
}
.header.scrolled .header-logo img {
    height: 50px;
}

.header-info {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* Language Switcher */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 4px;
}

.language-switcher a {
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-mid);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 6px;
    transition: all var(--transition-speed) ease;
}

.language-switcher a:hover {
    color: var(--text-light);
    background: rgba(0, 169, 157, 0.1);
}

.language-switcher a.active {
    background: var(--primary-color);
    color: var(--white-color);
}

.header-descriptor {
    color: var(--text-mid);
    font-weight: 500;
    text-align: right;
    font-size: 0.9rem;
    display: none;
}

.header-info .phone {
    font-weight: 700;
    font-size: 1.1rem;
    text-decoration: none;
    color: var(--text-light);
    transition: color var(--transition-speed) ease;
}
.header-info .phone:hover {
    color: var(--primary-color);
}

/* ====================
    4. ПЕРВЫЙ ЭКРАН (HERO)
    ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.7) 0%, rgba(118, 75, 162, 0.7) 25%, rgba(240, 147, 251, 0.6) 50%, rgba(0, 169, 157, 0.7) 75%, rgba(102, 126, 234, 0.7) 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    z-index: 2;
}

.hero .container {
    position: relative;
    z-index: 3;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-content {
    max-width: 950px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--white-color);
}

.hero p {
    color: var(--text-mid);
    font-size: 1.25rem;
    margin: 0 auto 2.5rem auto;
    max-width: 700px;
}

/* ====================
    5. ПРЕИМУЩЕСТВА (FEATURES)
    ==================== */
.features {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--dark-bg);
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 40%);
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}

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

.feature-card:hover::before {
    opacity: 0.3;
}

.feature-card h3 {
    color: var(--text-light);
}
.feature-card p {
    color: var(--text-mid);
}

/* ====================
    6. КАК МЫ ЭТО ОБЕСПЕЧИВАЕМ (HOW)
    ==================== */
.how {
    background-color: var(--dark-bg);
}

.how-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.how-item {
    text-align: center;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background-color: var(--secondary-bg);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.how-item:hover {
    transform: translateY(-8px);
}

.how-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-bg);
    padding: 20px;
}

.how-image img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    transition: transform 0.3s ease;
    border-radius: 8px;
}

.how-item:hover .how-image img {
    transform: scale(1.05);
}

.how-item h4,
.how-item p {
    padding: 0 1.5rem;
}

.how-item h4 { 
    color: var(--text-light);
    margin-top: 1rem;
}

.how-item p { 
    color: var(--text-mid); 
    font-size: 0.9rem;
    padding-bottom: 1.5rem;
}

.how-item .icon-wrapper {
    display: none;
}

/* ====================
    7. ДЛЯ КОГО (AUDIENCE)
    ==================== */
.audience {
    background: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.audience-card {
    background-color: var(--dark-bg);
    padding: 24px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-weight: 500;
    color: var(--text-light);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed) ease;
}
.audience-card:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}
.audience-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 30px;
}

/* ====================
    8. КАК МЫ НАЧИНАЕМ РАБОТАТЬ (PROCESS)
    ==================== */
.process-steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    background: var(--secondary-bg);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.step-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
}

.step-content h4 { color: var(--text-light); }
.step-content p { color: var(--text-mid); }

/* ====================
    9. CTA (CALL TO ACTION) & ФОРМЫ
    ==================== */
.cta {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 25%, rgba(240, 147, 251, 0.1) 50%, rgba(0, 169, 157, 0.2) 75%, rgba(102, 126, 234, 0.1) 100%);
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
    text-align: center;
    position: relative;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 100%, rgba(0, 169, 157, 0.15), transparent 50%);
    pointer-events: none;
}
.cta .container {
    max-width: 800px;
}
.cta h2 {
    background: linear-gradient(120deg, var(--white-color) 30%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.form-wrapper {
    max-width: 500px;
    margin: 2rem auto 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input {
    width: 100%;
    padding: 16px;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-light);
    font-size: 1rem;
    font-family: var(--font-body);
    transition: all var(--transition-speed) ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 15px var(--primary-glow);
}

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

.form-wrapper .btn {
    width: 100%;
}

.inline-cta {
    background-color: var(--secondary-bg);
    padding: 80px 0;
}

.inline-cta .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}
.inline-cta-text {
    flex-basis: 50%;
}
.inline-cta-form {
    flex-basis: 40%;
}
.inline-cta-form .form-wrapper {
    margin: 0;
    max-width: 100%;
}
.inline-cta-form .form-group {
    margin-bottom: 1rem;
}

/* ====================
    10. ПОДВАЛ (FOOTER)
    ==================== */
.footer {
    background-color: var(--dark-bg);
    border-top: 1px solid var(--border-color);
    color: var(--text-mid);
    padding: 80px 0 40px 0;
}

.footer a {
    color: var(--text-mid);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}
.footer a:hover {
    color: var(--primary-color);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    padding-bottom: 3rem;
    margin-bottom: 3rem;
    border-bottom: 1px solid var(--border-color);
}

.footer-logo img {
    height: 100px;
    filter: brightness(0) invert(1);
    opacity: 0.8;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.9rem;
}

.social-icons { display: flex; gap: 1.5rem; }
.social-icons a { font-size: 1.25rem; }

/* ====================
    11. АДАПТИВНОСТЬ
    ==================== */
@media(min-width: 768px) {
    .header-descriptor { display: block; }
}

@media(max-width: 992px) {
    .features-grid { grid-template-columns: 1fr; }
    .inline-cta .container {
        flex-direction: column;
        text-align: center;
    }
}

/* Floating mobile CTA button */
.mobile-cta-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 999;
    display: none;
    opacity: 0;
    transform: translateY(100px);
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.mobile-cta-float.visible {
    opacity: 1;
    transform: translateY(0);
}

.mobile-cta-float .btn {
    padding: 14px 28px;
    box-shadow: 0 4px 20px rgba(0, 169, 157, 0.4);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 4px 20px rgba(0, 169, 157, 0.4); }
    50% { box-shadow: 0 4px 30px rgba(0, 169, 157, 0.6); }
    100% { box-shadow: 0 4px 20px rgba(0, 169, 157, 0.4); }
}

@media(max-width: 768px) {
    section { padding: 60px 0; }
    .header-descriptor { display: none; }
    .header-info .phone { display: none; }
    .header-info .btn { display: none; }
    .footer-top, .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
    
    .language-switcher {
        margin-left: auto;
        padding: 3px;
    }

    .language-switcher a {
        padding: 5px 10px;
        font-size: 0.7rem;
    }
    
    .mobile-cta-float {
        display: block;
    }
    
    h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); }
    h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
    h3 { font-size: 1.2rem; }
    h4 { font-size: 1.1rem; }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .how-image {
        height: 200px;
        padding: 15px;
    }
    
    .how-image img {
        width: 150px;
        height: 150px;
    }
    
    .how-item h4 {
        font-size: 1.1rem;
        margin-top: 0.8rem;
    }
    
    .how-item p {
        font-size: 0.85rem;
        padding: 0 1rem 1rem 1rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
        padding: 0 1rem;
    }

    .reveal-custom .section-subtitle {
        font-size: 1.4rem;
    }
    
    .feature-card h3 {
        font-size: 1.15rem;
    }
    
    .feature-card p {
        font-size: 0.9rem;
    }
}