* {
    box-sizing: border-box;
}

:root {
    --gold: #ffd700;
    --bg: #050816;
    --card: rgba(13, 22, 53, 0.82);
}

body {
    min-height: 100vh;
    margin: 0;
    overflow-x: hidden;
    background: var(--bg);
    color: #fff;
    font-family: "Segoe UI", Arial, sans-serif;
}

canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

nav {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    display: flex;
    width: 100%;
    gap: 8px;
    padding: 12px max(16px, env(safe-area-inset-left));
    overflow-x: auto;
    background: rgba(3, 7, 24, 0.88);
    border-bottom: 1px solid rgba(255, 215, 0, 0.3);
    backdrop-filter: blur(12px);
    -webkit-overflow-scrolling: touch;
}

nav a {
    flex: 0 0 auto;
    padding: 10px 12px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    border-radius: 10px;
    transition: 0.2s ease;
}

nav a:hover,
nav a:focus {
    color: #111;
    background: var(--gold);
    outline: none;
}

.container {
    position: relative;
    z-index: 2;
    max-width: 980px;
    margin: 96px auto 40px;
    padding: 24px 20px 40px;
    text-align: center;
}

.logo {
    width: clamp(130px, 30vw, 220px);
    height: auto;
    border: 3px solid var(--gold);
    border-radius: 24px;
    box-shadow: 0 0 20px var(--gold), 0 0 40px rgba(255, 215, 0, 0.35);
    transition: transform 0.25s ease;
}

.logo:hover {
    transform: scale(1.04);
}

h1 {
    margin: 22px 0 10px;
    color: var(--gold);
    font-size: clamp(2rem, 6vw, 3rem);
    line-height: 1.1;
    text-shadow: 0 0 12px rgba(255, 215, 0, 0.65);
}

p {
    max-width: 620px;
    margin: 0 auto 30px;
    color: #d9d9d9;
    font-size: clamp(1rem, 3.8vw, 1.2rem);
    line-height: 1.6;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    max-width: 850px;
    margin: 0 auto;
}

.card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 155px;
    padding: 20px 12px;
    color: #fff;
    font-size: 3rem;
    text-decoration: none;
    background: var(--card);
    border: 1px solid rgba(255, 215, 0, 0.42);
    border-radius: 18px;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.card span {
    margin-top: 12px;
    font-size: 1.1rem;
    font-weight: 700;
}

.card:hover,
.card:focus {
    color: #111;
    background: var(--gold);
    box-shadow: 0 0 25px rgba(255, 215, 0, 0.6);
    outline: none;
    transform: translateY(-5px);
}

#startScreen {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    background: radial-gradient(circle, #16275d 0%, #050816 70%);
}

#startScreen h1 {
    max-width: 650px;
    font-size: clamp(2rem, 7vw, 3.5rem);
}

@media (max-width: 600px) {
    nav {
        gap: 4px;
        padding: 8px 10px;
    }

    nav a {
        padding: 9px 10px;
        font-size: 14px;
    }

    .container {
        margin-top: 78px;
        padding: 20px 14px 32px;
    }

    .cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
    }

    .card {
        min-height: 130px;
        font-size: 2.5rem;
        border-radius: 15px;
    }

    .card span {
        font-size: 1rem;
    }
}

@media (max-width: 340px) {
    .cards {
        grid-template-columns: 1fr;
    }
}
@media (max-width: 600px) {
    nav {
        justify-content: center;
        gap: 2px;
        overflow: hidden;
        padding: 8px 6px;
    }

    nav a {
        flex: 1 1 0;
        padding: 8px 2px;
        font-size: 0;
        text-align: center;
    }

    nav a::before {
        font-size: 24px;
    }

    nav a:nth-child(1)::before { content: "🏡"; }
    nav a:nth-child(2)::before { content: "📚"; }
    nav a:nth-child(3)::before { content: "📽️"; }
    nav a:nth-child(4)::before { content: "🎮"; }
    nav a:nth-child(5)::before { content: "🖼️"; }
    nav a:nth-child(6)::before { content: "📁"; }
}