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

:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-secondary: #555;
    --color-accent: #4a6cf7;
    --color-accent-dark: #3b5de7;
    --radius: 16px;
    --max-width: 960px;
}

html { scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

/* === Nav === */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 250, 250, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 700;
}

.nav-icon {
    width: 32px;
    height: 32px;
    border-radius: 7px;
}

.lang-switcher {
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    background: var(--color-surface);
    font-size: 14px;
    color: var(--color-text);
    cursor: pointer;
    outline: none;
}

.lang-switcher:focus {
    border-color: var(--color-accent);
}

/* === Hero === */
.hero {
    text-align: center;
    padding: 80px 24px 48px;
}

.hero-icon {
    width: 120px;
    height: 120px;
    border-radius: 26px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.12);
    margin-bottom: 24px;
}

.hero h1 {
    font-size: 32px;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.hero-promo {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
}

.app-store-badge svg {
    transition: transform 0.2s;
}

.app-store-badge:hover svg {
    transform: scale(1.05);
}

/* === Screenshots === */
.screenshots {
    padding: 24px 0 48px;
    overflow: hidden;
}

.screenshots .container {
    max-width: 100%;
    padding: 0;
}

.screenshots-track {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 8px 24px 24px;
    scrollbar-width: none;
}

.screenshots-track::-webkit-scrollbar { display: none; }

.screenshots-track img {
    flex-shrink: 0;
    height: 480px;
    border-radius: 20px;
    scroll-snap-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    object-fit: contain;
}

/* === Features === */
.features {
    padding: 32px 0 64px;
}

.features .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.feature-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    border: 1px solid rgba(0,0,0,0.04);
}

.feature-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.feature-card h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p,
.feature-card li {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.feature-card ul {
    list-style: none;
    padding: 0;
}

.feature-card li {
    padding-left: 20px;
    position: relative;
    margin-bottom: 6px;
}

.feature-card li::before {
    content: "•";
    position: absolute;
    left: 4px;
    color: var(--color-accent);
    font-weight: 700;
}

/* === Support === */
.support {
    text-align: center;
    padding: 64px 24px;
    background: var(--color-surface);
    border-top: 1px solid rgba(0,0,0,0.04);
}

.support h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 12px;
}

.support p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
}

.support-email {
    display: inline-block;
    font-size: 20px;
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
    padding: 12px 32px;
    border: 2px solid var(--color-accent);
    border-radius: 12px;
    transition: all 0.2s;
}

.support-email:hover {
    background: var(--color-accent);
    color: #fff;
}

.support-links {
    margin-top: 20px;
}

.support-links a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 15px;
}

.support-links a:hover {
    text-decoration: underline;
}

/* === Footer === */
.footer {
    text-align: center;
    padding: 24px;
    font-size: 14px;
    color: #999;
}

/* === Responsive === */
@media (max-width: 680px) {
    .hero { padding: 56px 24px 32px; }
    .hero h1 { font-size: 26px; }
    .hero-subtitle { font-size: 17px; }
    .hero-icon { width: 96px; height: 96px; border-radius: 22px; }

    .screenshots-track img { height: 380px; border-radius: 16px; }

    .features .container {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .feature-card { padding: 24px; }
    .support h2 { font-size: 24px; }
}