:root {
    --bg:      #0b1220;
    --panel:   #0B1220;
    --border:  rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 255, 255, 0.18);
    --text:    #e2e8f0;
    --muted:   #94a3b8;
    --shadow:  0 6px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 18px 48px rgba(0, 0, 0, 0.6);
}

* {
    box-sizing: border-box;
}

body {
    background-color: var(--bg);
    font-family: system-ui, -apple-system, sans-serif;
    color: var(--text);
    margin: 0;
    padding: 48px 24px 40px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 40px;
}

/* ── Logo ── */
.logo-container {
    transition: transform 0.3s ease, filter 0.3s ease;
}
.logo-container:hover {
    transform: translateY(-8px);
    filter: drop-shadow(0 12px 20px rgba(0, 0, 0, 0.6));
}
.logo {
    width: 120px;
    height: 120px;
    display: block;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.12);
    object-fit: cover;
    box-sizing: border-box;
}

/* ── Nav card grid ── */
.nav-grid {
    display: grid;
    grid-template-columns: repeat(2, 200px);
    gap: 16px;
}

.nav-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 32px 16px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: var(--text);
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.nav-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-hover);
}

.nav-icon {
    width: 72px;
    height: 72px;
    object-fit: contain;
    display: block;
}
.nav-label {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

/* ── Social links ── */
.social-links {
    display: flex;
    gap: 8px;
}
.social-link {
    display: inline-block;
    background: #1f2937;
    color: var(--text);
    text-decoration: none;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: 999px;
    transition: background 0.2s ease;
}
.social-link:hover {
    background: #2d3f52;
}

/* ── Mobile ── */
@media (max-width: 480px) {
    body {
        padding: 0;
        gap: 20px;
        height: 100dvh;
        overflow: hidden;
        align-items: stretch;
    }

    .logo-container {
        align-self: center;
        padding-top: 24px;
    }

    .logo {
        width: 150px;
        height: 150px;
    }

    .nav-grid {
        height: 54dvh;
        width: calc(100% - 16px);
        max-width: 100%;
        margin: 0 8px;
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(2, 1fr);
        gap: 8px;
    }

    .nav-card {
        border-radius: 0;
        padding: 0;
        justify-content: center;
    }

    .nav-icon {
        width: 150px;
        height: 150px;
    }

    .social-links {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        justify-content: center;
        gap: 12px;
        padding: 12px 20px;
        padding-bottom: max(12px, env(safe-area-inset-bottom));
        background: var(--bg);
        border-top: 1px solid var(--border);
        z-index: 10;
        flex-wrap: nowrap;
    }
}