/* Лендинг index.php — анимации при скролле и оформление */

:root {
    --landing-bg: #0a0a12;
    --landing-surface: rgba(255, 255, 255, 0.06);
    --landing-border: rgba(255, 255, 255, 0.12);
    --landing-text: #f4f4f8;
    --landing-muted: #9b9bb8;
    --landing-accent: #a78bfa;
    --landing-accent-2: #f472b6;
    --landing-glow: rgba(167, 139, 250, 0.45);
    --landing-radius: 20px;
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

html.landing-page {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html.landing-page {
        scroll-behavior: auto;
    }
    .landing-hero__mesh,
    .landing-btn--primary::after,
    [data-reveal] {
        animation: none !important;
        transition: none !important;
    }
}

body.landing-body {
    margin: 0;
    font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--landing-bg);
    color: var(--landing-text);
    line-height: 1.6;
    overflow-x: hidden;
}

.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(10, 10, 18, 0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--landing-border);
    transition: background 0.35s var(--ease-out-expo), box-shadow 0.35s var(--ease-out-expo);
}

.landing-nav.is-scrolled {
    background: rgba(10, 10, 18, 0.88);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.landing-nav__brand {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.06em;
    background: linear-gradient(120deg, #fff 0%, var(--landing-accent) 50%, var(--landing-accent-2) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.landing-nav__links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.landing-nav__links a {
    color: var(--landing-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.25s ease;
}

.landing-nav__links a:hover {
    color: var(--landing-text);
}

.landing-nav__cta {
    padding: 8px 18px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--landing-accent), var(--landing-accent-2));
    color: #0a0a12 !important;
    font-weight: 600;
    font-size: 0.85rem;
}

@media (max-width: 640px) {
    .landing-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }
    .landing-nav__links {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }
}

.landing-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 100px 24px 80px;
    overflow: hidden;
}

.landing-hero__mesh {
    position: absolute;
    inset: -40%;
    background:
        radial-gradient(ellipse 50% 40% at 20% 30%, var(--landing-glow), transparent 55%),
        radial-gradient(ellipse 45% 35% at 80% 20%, rgba(244, 114, 182, 0.25), transparent 50%),
        radial-gradient(ellipse 40% 50% at 50% 100%, rgba(99, 102, 241, 0.2), transparent 45%);
    animation: landing-mesh-drift 22s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes landing-mesh-drift {
    0% { transform: translate(0, 0) scale(1); opacity: 0.9; }
    100% { transform: translate(3%, 2%) scale(1.05); opacity: 1; }
}

.landing-hero__content {
    position: relative;
    z-index: 2;
    max-width: 720px;
}

.landing-hero__badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid var(--landing-border);
    background: var(--landing-surface);
    font-size: 0.8rem;
    color: var(--landing-muted);
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(16px);
    animation: landing-hero-in 1s var(--ease-out-expo) 0.1s forwards;
}

.landing-hero h1 {
    font-size: clamp(2rem, 6vw, 3.25rem);
    font-weight: 800;
    line-height: 1.15;
    margin: 0 0 20px;
    letter-spacing: -0.02em;
    opacity: 0;
    transform: translateY(24px);
    animation: landing-hero-in 1s var(--ease-out-expo) 0.25s forwards;
}

.landing-hero__lead {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--landing-muted);
    max-width: 560px;
    margin: 0 auto 36px;
    opacity: 0;
    transform: translateY(20px);
    animation: landing-hero-in 1s var(--ease-out-expo) 0.4s forwards;
}

@keyframes landing-hero-in {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.landing-hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
    opacity: 0;
    transform: translateY(20px);
    animation: landing-hero-in 1s var(--ease-out-expo) 0.55s forwards;
}

.landing-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    border-radius: 14px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.35s var(--ease-out-expo), box-shadow 0.35s ease;
}

.landing-btn:active {
    transform: scale(0.98);
}

.landing-btn--primary {
    position: relative;
    background: linear-gradient(135deg, #8b5cf6, #ec4899);
    color: #fff;
    box-shadow: 0 8px 32px rgba(139, 92, 246, 0.35);
    overflow: hidden;
}

.landing-btn--primary::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, transparent 40%, rgba(255, 255, 255, 0.25) 50%, transparent 60%);
    transform: translateX(-100%);
    animation: landing-shine 4s ease-in-out infinite;
}

@keyframes landing-shine {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.landing-btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 48px rgba(236, 72, 153, 0.35);
}

.landing-btn--ghost {
    background: var(--landing-surface);
    color: var(--landing-text);
    border: 1px solid var(--landing-border);
}

.landing-btn--ghost:hover {
    transform: translateY(-3px);
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.1);
}

.landing-scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--landing-muted);
    font-size: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.7;
    animation: landing-bounce 2.5s ease-in-out infinite;
}

@keyframes landing-bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

.landing-scroll-hint span {
    width: 22px;
    height: 36px;
    border: 2px solid var(--landing-border);
    border-radius: 12px;
    position: relative;
}

.landing-scroll-hint span::after {
    content: "";
    position: absolute;
    top: 6px;
    left: 50%;
    width: 4px;
    height: 8px;
    margin-left: -2px;
    background: var(--landing-accent);
    border-radius: 2px;
    animation: landing-wheel 1.8s ease-in-out infinite;
}

@keyframes landing-wheel {
    0%, 100% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0.3; transform: translateY(10px); }
}

.landing-section {
    padding: 100px 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.landing-section__title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.landing-section__subtitle {
    text-align: center;
    color: var(--landing-muted);
    max-width: 560px;
    margin: 0 auto 56px;
    font-size: 1.05rem;
}

[data-reveal] {
    opacity: 0;
    transform: translateY(40px) scale(0.98);
    filter: blur(4px);
    transition:
        opacity 0.85s var(--ease-out-expo),
        transform 0.85s var(--ease-out-expo),
        filter 0.85s var(--ease-out-expo);
    will-change: opacity, transform, filter;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
}

[data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal-delay="3"] { transition-delay: 0.24s; }

.landing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.landing-card {
    padding: 28px;
    border-radius: var(--landing-radius);
    background: var(--landing-surface);
    border: 1px solid var(--landing-border);
    transition: transform 0.45s var(--ease-out-expo), border-color 0.35s ease, box-shadow 0.45s ease;
}

.landing-card:hover {
    transform: translateY(-6px);
    border-color: rgba(167, 139, 250, 0.35);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.landing-card__icon {
    font-size: 2rem;
    margin-bottom: 16px;
    display: block;
}

.landing-card h3 {
    margin: 0 0 12px;
    font-size: 1.15rem;
}

.landing-card p {
    margin: 0;
    color: var(--landing-muted);
    font-size: 0.95rem;
}

.landing-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
    max-width: 640px;
    margin: 0 auto;
}

.landing-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
    border-radius: var(--landing-radius);
    background: var(--landing-surface);
    border: 1px solid var(--landing-border);
}

.landing-step__num {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--landing-accent), var(--landing-accent-2));
    color: #0a0a12;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.landing-step h3 {
    margin: 0 0 6px;
    font-size: 1.05rem;
}

.landing-step p {
    margin: 0;
    color: var(--landing-muted);
    font-size: 0.92rem;
}

.landing-cta {
    text-align: center;
    padding: 100px 24px;
    margin: 40px 24px 80px;
    border-radius: 28px;
    background: linear-gradient(145deg, rgba(139, 92, 246, 0.2), rgba(236, 72, 153, 0.12));
    border: 1px solid var(--landing-border);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.landing-cta h2 {
    margin: 0 0 12px;
    font-size: clamp(1.5rem, 4vw, 2rem);
}

.landing-cta p {
    color: var(--landing-muted);
    margin-bottom: 28px;
}

.landing-footer {
    padding: 40px 24px 60px;
    text-align: center;
    color: var(--landing-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--landing-border);
}

.landing-footer a {
    color: var(--landing-accent);
    text-decoration: none;
}

.landing-viewer {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: linear-gradient(160deg, #0a0a12 0%, #1a1025 100%);
}

.landing-viewer .card {
    max-width: 480px;
    margin: 0 auto;
}