* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
    background: #0b1020;
    color: #f7f9ff;
}

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 16, 32, 0.86);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #ffffff;
    text-decoration: none;
    font-size: 22px;
    font-weight: 800;
}

.brand-mark {
    width: 38px;
    height: 38px;
    display: grid;
    place-items: center;
    border-radius: 12px;
    background: linear-gradient(135deg, #63e6be, #4dabf7, #845ef7);
    color: white;
}

.nav {
    display: flex;
    gap: 26px;
}

.nav a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 15px;
}

.nav a:hover {
    color: #ffffff;
}

.hero {
    min-height: 720px;
    display: flex;
    align-items: center;
    background:
        radial-gradient(circle at 25% 20%, rgba(77, 171, 247, 0.32), transparent 34%),
        radial-gradient(circle at 80% 10%, rgba(132, 94, 247, 0.25), transparent 30%),
        linear-gradient(180deg, #0b1020 0%, #111827 100%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
}

.eyebrow {
    margin: 0 0 16px;
    color: #63e6be;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 13px;
}

h1, h2, h3, p {
    word-break: keep-all;
}

h1 {
    margin: 0;
    font-size: clamp(44px, 6vw, 76px);
    line-height: 1.05;
    letter-spacing: -0.05em;
}

.hero-text {
    margin: 26px 0 36px;
    color: #cbd5e1;
    font-size: 19px;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 24px;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 800;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn.primary {
    color: #07111f;
    background: linear-gradient(135deg, #63e6be, #74c0fc);
}

.btn.secondary {
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
}

.btn.large {
    min-height: 58px;
    padding: 0 32px;
}

.download-note, .muted {
    color: #94a3b8;
}

.hero-card {
    border-radius: 28px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
}

.window-bar {
    height: 52px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 18px;
    background: rgba(255, 255, 255, 0.1);
}

.window-bar span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
}

.window-content {
    padding: 42px;
}

.window-content h2 {
    font-size: 42px;
    margin: 0 0 24px;
}

.window-content li {
    margin: 16px 0;
    color: #dbeafe;
    font-size: 18px;
}

.section {
    padding: 96px 0;
}

.section-title {
    margin-bottom: 34px;
}

.section-title h2, .download-box h2, .update-grid h2, .contact-box h2 {
    margin: 0 0 14px;
    font-size: clamp(32px, 4vw, 48px);
    letter-spacing: -0.04em;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature-card, .release-card, .contact-box, .download-box {
    background: rgba(255, 255, 255, 0.07);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 24px;
}

.feature-card {
    padding: 28px;
}

.feature-card h3 {
    margin: 0 0 12px;
    font-size: 22px;
}

.feature-card p {
    margin: 0;
    color: #cbd5e1;
    line-height: 1.7;
}

.download-section {
    padding: 90px 0;
    background: linear-gradient(135deg, rgba(99, 230, 190, 0.14), rgba(116, 192, 252, 0.10));
}

.download-box {
    padding: 38px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.update-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 40px;
    align-items: start;
}

.release-card {
    padding: 34px;
}

.release-card strong {
    display: block;
    font-size: 24px;
    margin-bottom: 18px;
}

.release-card li {
    margin: 12px 0;
    color: #cbd5e1;
}

.contact-box {
    padding: 38px;
    text-align: center;
}

code {
    padding: 4px 8px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: #dbeafe;
}

.site-footer {
    padding: 28px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: #94a3b8;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 16px;
}

@media (max-width: 820px) {
    .header-inner {
        height: auto;
        padding: 18px 0;
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        gap: 14px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        min-height: auto;
        padding: 90px 0;
    }

    .hero-grid, .update-grid {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .download-box {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-inner {
        flex-direction: column;
    }
}