/* ==========================================================================
   LUMA — Elegant Dark Pattern & 3D Scroll Animation
   Pixel-perfect port of DarkGradientBg + ContainerScroll in Vanilla CSS
   ========================================================================== */

:root {
    --bg-dark: #000000;
    --card-bg: #222222;
    --card-inner-bg: #151518;
    --card-border: #6C6C6C;
    --text-main: #f5f5f7;
    --text-muted: #9ca3af;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --font-heading: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Helvetica Neue', sans-serif;
    --font-body: 'SF Pro Display', 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   ELEGANT DARK PATTERN BACKGROUND (Порт компонента DarkGradientBg)
   ========================================================================== */

.dark-gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #000000;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

/* Базовый радиальный градиент с маской */
.dark-radial-base {
    position: absolute;
    inset: 0;
    opacity: 1;
    background: radial-gradient(100% 100% at 0% 0%, rgb(46, 46, 46) 0%, rgb(0, 0, 0) 100%);
    -webkit-mask: radial-gradient(125% 100% at 0% 0%, rgb(0, 0, 0) 0%, rgba(0, 0, 0, 0.224) 88.2883%, rgba(0, 0, 0, 0) 100%);
    mask: radial-gradient(125% 100% at 0% 0%, rgb(0, 0, 0) 0%, rgba(0, 0, 0, 0.224) 88.2883%, rgba(0, 0, 0, 0) 100%);
}

/* Скошенные градиентные синие полосы/лучи с плавной органичной анимацией */
.blue-streak {
    position: absolute;
    inset: -30px;
    opacity: 0.2;
    background: linear-gradient(rgb(0, 207, 255) 0%, rgba(0, 207, 255, 0) 100%);
    transform: skewX(45deg);
    transform-origin: top left;
    will-change: transform, opacity;
}

.streak-1 {
    -webkit-mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0) 20%, rgba(0, 0, 0, 0) 36%, rgb(0, 0, 0) 55%, rgba(0, 0, 0, 0.13) 67%, rgb(0, 0, 0) 78%, rgba(0, 0, 0, 0) 97%);
    mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0) 20%, rgba(0, 0, 0, 0) 36%, rgb(0, 0, 0) 55%, rgba(0, 0, 0, 0.13) 67%, rgb(0, 0, 0) 78%, rgba(0, 0, 0, 0) 97%);
    animation: driftStreak1 18s ease-in-out infinite;
}

.streak-2 {
    -webkit-mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 11%, rgb(0, 0, 0) 25%, rgba(0, 0, 0, 0.55) 41%, rgba(0, 0, 0, 0.13) 67%, rgb(0, 0, 0) 78%, rgba(0, 0, 0, 0) 97%);
    mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 11%, rgb(0, 0, 0) 25%, rgba(0, 0, 0, 0.55) 41%, rgba(0, 0, 0, 0.13) 67%, rgb(0, 0, 0) 78%, rgba(0, 0, 0, 0) 97%);
    animation: driftStreak2 22s ease-in-out infinite;
}

.streak-3 {
    -webkit-mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 9%, rgb(0, 0, 0) 20%, rgba(0, 0, 0, 0.55) 28%, rgba(0, 0, 0, 0.424) 40%, rgb(0, 0, 0) 48%, rgba(0, 0, 0, 0.267) 54%, rgba(0, 0, 0, 0.13) 78%, rgb(0, 0, 0) 88%, rgba(0, 0, 0, 0) 97%);
    mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 9%, rgb(0, 0, 0) 20%, rgba(0, 0, 0, 0.55) 28%, rgba(0, 0, 0, 0.424) 40%, rgb(0, 0, 0) 48%, rgba(0, 0, 0, 0.267) 54%, rgba(0, 0, 0, 0.13) 78%, rgb(0, 0, 0) 88%, rgba(0, 0, 0, 0) 97%);
    animation: driftStreak3 16s ease-in-out infinite;
}

.streak-4 {
    -webkit-mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0) 17%, rgba(0, 0, 0, 0.55) 26%, rgb(0, 0, 0) 35%, rgba(0, 0, 0, 0.47) 47%, rgba(0, 0, 0, 0.13) 69%, rgb(0, 0, 0) 79%, rgba(0, 0, 0, 0) 97%);
    mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0) 17%, rgba(0, 0, 0, 0.55) 26%, rgb(0, 0, 0) 35%, rgba(0, 0, 0, 0.47) 47%, rgba(0, 0, 0, 0.13) 69%, rgb(0, 0, 0) 79%, rgba(0, 0, 0, 0) 97%);
    animation: driftStreak4 24s ease-in-out infinite;
}

.streak-5 {
    -webkit-mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0) 20%, rgba(0, 0, 0, 0.55) 27%, rgb(0, 0, 0) 42%, rgba(0, 0, 0, 0.48) 48%, rgba(0, 0, 0, 0.13) 67%, rgb(0, 0, 0) 74%, rgb(0, 0, 0) 82%, rgba(0, 0, 0, 0.47) 88%, rgba(0, 0, 0, 0) 97%);
    mask: linear-gradient(90deg, rgba(0, 0, 0, 0) 0%, rgb(0, 0, 0) 20%, rgba(0, 0, 0, 0.55) 27%, rgb(0, 0, 0) 42%, rgba(0, 0, 0, 0.48) 48%, rgba(0, 0, 0, 0.13) 67%, rgb(0, 0, 0) 74%, rgb(0, 0, 0) 82%, rgba(0, 0, 0, 0.47) 88%, rgba(0, 0, 0, 0) 97%);
    animation: driftStreak5 20s ease-in-out infinite;
}

@keyframes driftStreak1 {
    0%, 100% { transform: skewX(45deg) translate(0, 0); opacity: 0.18; }
    50% { transform: skewX(43deg) translate(-25px, 15px); opacity: 0.26; }
}

@keyframes driftStreak2 {
    0%, 100% { transform: skewX(45deg) translate(0, 0); opacity: 0.22; }
    50% { transform: skewX(47deg) translate(20px, -15px); opacity: 0.16; }
}

@keyframes driftStreak3 {
    0%, 100% { transform: skewX(45deg) translate(0, 0); opacity: 0.17; }
    50% { transform: skewX(44deg) translate(-15px, -20px); opacity: 0.25; }
}

@keyframes driftStreak4 {
    0%, 100% { transform: skewX(45deg) translate(0, 0); opacity: 0.20; }
    50% { transform: skewX(46deg) translate(18px, 18px); opacity: 0.27; }
}

@keyframes driftStreak5 {
    0%, 100% { transform: skewX(45deg) translate(0, 0); opacity: 0.21; }
    50% { transform: skewX(44.5deg) translate(-12px, 12px); opacity: 0.15; }
}

/* Текстура Framer */
.texture-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.05;
    background-image: url("https://framerusercontent.com/images/6mcf62RlDfRfU61Yg5vb2pefpi4.png");
    background-repeat: repeat;
    background-size: 149.76px;
}

/* Точечный узор с легким мерцанием */
.dot-pattern-overlay {
    position: absolute;
    inset: 0;
    opacity: 0.2;
    background-image: radial-gradient(circle at 1px 1px, rgba(255, 255, 255, 0.5) 1px, transparent 0);
    background-size: 20px 20px;
    animation: dotBreathe 12s ease-in-out infinite;
}

@keyframes dotBreathe {
    0%, 100% { opacity: 0.16; }
    50% { opacity: 0.24; }
}

/* Мягкий радиальный акцент с плавным дыханием */
.radial-highlight {
    position: absolute;
    inset: -10%;
    background: radial-gradient(circle at 50% 30%, rgba(0, 207, 255, 0.08) 0%, rgba(30, 41, 59, 0.2) 35%, transparent 70%);
    animation: highlightPulse 16s ease-in-out infinite alternate;
    will-change: transform, opacity;
}

@keyframes highlightPulse {
    0% { transform: scale(0.98) translate(0, 0); opacity: 0.75; }
    100% { transform: scale(1.04) translate(-1.5%, 2%); opacity: 1; }
}

/* ==========================================================================
   СТРАНИЦА И КОНТЕНТ
   ========================================================================== */

.page-container {
    position: relative;
    z-index: 2;
    width: 100%;
}

/* Навигация (Header) */
.header {
    position: fixed;
    top: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(18, 18, 22, 0.65);
    border: 1px solid var(--border-subtle);
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    max-width: 960px;
    width: calc(100% - 3rem);
    transition: all 0.3s ease;
}

.header:hover {
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(22, 22, 28, 0.8);
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    text-decoration: none;
}

.logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    border-radius: 8px;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.4));
    transition: transform 0.25s ease;
}

.logo:hover .logo-img {
    transform: scale(1.08);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: color 0.25s ease, transform 0.25s ease;
}

.nav-link:hover {
    color: #ffffff;
    transform: translateY(-1px);
}

.btn-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    color: #000000;
    padding: 0.45rem 1.25rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.25s ease;
}

.btn-nav:hover {
    background: #f0f0f5;
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

/* ==========================================================================
   3D CONTAINER SCROLL ANIMATION (Порт Aceternity UI)
   ========================================================================== */

.scroll-container-wrapper {
    min-height: 130vh;
    padding: 6rem 1rem 4rem 1rem;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    position: relative;
}

@media (min-width: 768px) {
    .scroll-container-wrapper {
        min-height: 150vh;
        padding: 7.5rem 2rem 6rem 2rem;
    }
}

.scroll-perspective-box {
    width: 100%;
    max-width: 1100px;
    position: relative;
    perspective: 1000px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Header внутри Scroll контейнера */
.scroll-header {
    position: relative;
    width: 100%;
    max-width: 1024px;
    margin: 0 auto 1.5rem auto;
    text-align: center;
    will-change: transform;
    transform: translateY(0px);
    transition: transform 0.1s cubic-bezier(0, 0, 0.2, 1);
    z-index: 10;
}

@media (min-width: 768px) {
    .scroll-header {
        margin-bottom: 2rem;
    }
}

.scroll-title {
    font-size: clamp(2.2rem, 5.5vw, 4.2rem);
    font-weight: 700;
    line-height: 1.05;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.scroll-title-highlight {
    display: inline-block;
    font-size: clamp(2.8rem, 7vw, 5.5rem);
    font-weight: 800;
    margin-top: 0.2rem;
    line-height: 1;
    background: linear-gradient(180deg, #ffffff 40%, rgba(255, 255, 255, 0.4) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.03em;
}

/* 3D Card с эффектом наклона и вращения */
.scroll-card {
    position: relative;
    max-width: 1024px;
    width: 100%;
    height: 32rem; /* h-[30rem] */
    margin-top: -0.75rem;
    margin-left: auto;
    margin-right: auto;
    border: 4px solid var(--card-border);
    padding: 0.5rem; /* p-2 */
    background-color: var(--card-bg);
    border-radius: 30px;
    box-shadow: 0 0 #0000004d, 0 9px 20px #0000004a, 0 37px 37px #00000042, 0 84px 50px #00000026, 0 149px 60px #0000000a, 0 233px 65px #00000003;
    transform-origin: top center;
    will-change: transform;
    transform: rotateX(20deg) scale(1.05);
    transition: transform 0.08s cubic-bezier(0, 0, 0.2, 1);
}

@media (min-width: 768px) {
    .scroll-card {
        height: 40rem; /* md:h-[40rem] */
        padding: 1.25rem; /* md:p-6 */
        margin-top: -1rem;
    }
}

.scroll-card-inner {
    height: 100%;
    width: 100%;
    overflow: hidden;
    border-radius: 1.1rem;
    background-color: var(--card-inner-bg);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

/* Обертка для изображения без фона внутри карточки */
.card-image-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 50% 50%, rgba(35, 35, 45, 0.5) 0%, rgba(10, 10, 14, 0.8) 100%);
    padding: 1rem;
}

@media (min-width: 768px) {
    .card-image-wrapper {
        padding: 1.5rem;
    }
}

.scroll-card-image {
    max-width: 100%;
    max-height: 100%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
    border-radius: 0.85rem;
    user-select: none;
    -webkit-user-drag: none;
    display: block;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    filter: drop-shadow(0 0 25px rgba(255, 255, 255, 0.05));
}

/* ==========================================================================
   SERVICE & SUPPORT SECTION (Lottie слева + Описание справа)
   ========================================================================== */

.service-section {
    max-width: 1150px;
    margin: 3rem auto 7rem auto;
    padding: 0 2rem;
    position: relative;
}

.service-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3.5rem;
    align-items: center;
}

@media (min-width: 900px) {
    .service-container {
        grid-template-columns: 0.95fr 1.05fr;
        gap: 4.5rem;
    }
}

/* Левая колонка: Lottie Animation (без рамок и фона, увеличена) */
.service-lottie-col {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.lottie-container {
    width: 100%;
    max-width: 580px;
    height: 480px;
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
}

.lottie-container svg {
    max-width: 100%;
    max-height: 100%;
    width: 100% !important;
    height: 100% !important;
}

/* Правая колонка: Текст и особенности */
.service-content-col {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.service-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 3.8vw, 3rem);
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1.2rem;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.service-desc {
    font-size: 1.05rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin-bottom: 2.2rem;
    font-weight: 300;
}

.service-features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-feature-item {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.1rem 1.4rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(10px);
    transition: all 0.25s ease;
}

.service-feature-item:hover {
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
    transform: translateX(4px);
}

.service-feature-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    flex-shrink: 0;
    margin-top: 2px;
}

.service-feature-info h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 0.3rem;
}

.service-feature-info p {
    font-size: 0.88rem;
    line-height: 1.5;
    color: var(--text-muted);
    margin: 0;
}

/* ==========================================================================
   FEATURES SECTION
   ========================================================================== */

.features-section {
    max-width: 1100px;
    margin: 4rem auto 8rem auto;
    padding: 0 2rem;
    text-align: center;
}

.section-badge {
    display: inline-block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto 3.5rem auto;
    font-weight: 300;
}

/* ==========================================================================
   OS DOWNLOADS SECTION (Linux & Windows)
   ========================================================================== */

.os-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
    text-align: left;
}

.os-download-card {
    background: rgba(18, 18, 24, 0.55);
    border: 1px solid rgba(255, 255, 255, 0.09);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 2.2rem;
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.os-download-card:hover {
    border-color: rgba(255, 255, 255, 0.16);
    background: rgba(20, 20, 26, 0.65);
}

.os-card-header {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
}

.os-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    flex-shrink: 0;
}

.os-brand-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
}

.os-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.os-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
}

.os-badge {
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.os-desc {
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--text-muted);
    margin-bottom: 1.75rem;
    font-weight: 300;
}

.os-buttons-stack {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.os-btn-download {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    color: #ffffff;
    text-decoration: none;
    transition: border-color 0.2s ease, background-color 0.2s ease;
}

.os-btn-download:hover {
    border-color: rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.06);
    color: #ffffff;
}

.btn-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.btn-name {
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.btn-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.os-btn-download:hover .btn-sub {
    color: #a1a1aa;
}

.btn-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.ext-badge {
    font-size: 0.72rem;
    font-family: monospace;
    padding: 0.2rem 0.55rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.85);
    transition: all 0.2s ease;
}

.os-btn-download:hover .ext-badge {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
}

/* Подвал */
.footer {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #66666e;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #00cfff;
    box-shadow: 0 0 8px rgba(0, 207, 255, 0.7);
}

/* Адаптивность для мобильных устройств */
@media (max-width: 768px) {
    .header {
        width: calc(100% - 2rem);
        padding: 0.6rem 1.2rem;
    }
    
    .nav {
        display: none;
    }

    .scroll-container-wrapper {
        padding-top: 5rem;
    }

    .scroll-card {
        height: 24rem;
        margin-top: -0.5rem;
    }

    .service-section {
        margin: 2rem auto 5rem auto;
        padding: 0 1.25rem;
    }

    .lottie-container {
        height: 340px;
        max-width: 100%;
    }

    .service-content-col {
        text-align: center;
    }

    .service-desc {
        text-align: center;
    }

    .service-features-list {
        text-align: left;
    }

    .os-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .os-download-card {
        padding: 1.6rem 1.25rem;
    }

    .footer {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}