/* ============================================
   Gobblet Gobblers 3D — Landing Page
   Dark gaming theme with cyan/pink/purple
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Inter:wght@300;400;600&display=swap');

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

:root {
    --cyan: #00f0ff;
    --pink: #ff2d78;
    --purple: #a855f7;
    --bg-dark: #0a0a1a;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --text: #e0e0e0;
    --text-dim: #888;
    --glow-cyan: 0 0 30px rgba(0, 240, 255, 0.3);
    --glow-pink: 0 0 30px rgba(255, 45, 120, 0.3);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    overflow-x: hidden;
    line-height: 1.6;
}

/* ---------- Particles Background ---------- */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ---------- 3D Model Container ---------- */
#model-container {
    position: fixed;
    top: 0;
    right: -5%;
    width: 45vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#three-canvas {
    width: 100%;
    height: 100%;
}

/* ---------- Sections ---------- */
.section {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 80px 8%;
}

.section-title {
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 50px;
    text-align: center;
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- Hero Section ---------- */
#hero {
    min-height: 100vh;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
}

.hero-content {
    max-width: 550px;
}

.game-title {
    font-family: 'Orbitron', sans-serif;
    line-height: 1;
    margin-bottom: 24px;
}

.title-main {
    display: block;
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 900;
    color: var(--pink);
    text-shadow: 0 0 40px rgba(255, 45, 120, 0.5), 0 0 80px rgba(255, 45, 120, 0.2);
    letter-spacing: 4px;
}

.title-sub {
    display: block;
    font-size: clamp(1.8rem, 5vw, 3.5rem);
    font-weight: 700;
    background: linear-gradient(90deg, var(--cyan), var(--purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 6px;
}

.title-3d {
    display: inline-block;
    font-size: clamp(1.2rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--cyan);
    border: 2px solid var(--cyan);
    padding: 4px 16px;
    margin-top: 8px;
    border-radius: 8px;
    text-shadow: var(--glow-cyan);
    box-shadow: var(--glow-cyan);
}

.tagline {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--text-dim);
    margin-bottom: 40px;
    font-weight: 300;
}

/* ---------- CTA Button ---------- */
.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--pink), #c2185b);
    color: white;
    text-decoration: none;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s ease;
    box-shadow: var(--glow-pink);
    letter-spacing: 0.5px;
}

.cta-button:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 0 50px rgba(255, 45, 120, 0.5), 0 10px 40px rgba(255, 45, 120, 0.3);
}

.cta-large {
    padding: 20px 44px;
    font-size: 1.1rem;
}

.play-icon {
    flex-shrink: 0;
}

/* ---------- Features ---------- */
#features {
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 20px;
    padding: 40px 28px;
    text-align: center;
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-8px);
    border-color: rgba(0, 240, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3), inset 0 0 30px rgba(0, 240, 255, 0.03);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2rem;
    color: var(--cyan);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* ---------- How to Play ---------- */
#how-to-play {
    max-width: 700px;
    margin: 0 auto;
    width: 100%;
}

.rules-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.rule {
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 16px;
    padding: 28px 32px;
    transition: all 0.3s ease;
}

.rule:hover {
    background: var(--bg-card-hover);
    border-color: rgba(168, 85, 247, 0.2);
}

.rule-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--bg-dark);
    background: linear-gradient(135deg, var(--cyan), var(--purple));
    border-radius: 50%;
}

.rule p {
    font-size: 1.05rem;
    color: var(--text);
}

.rule strong {
    color: var(--pink);
}

/* ---------- Screenshots ---------- */
#screenshots {
    padding-bottom: 40px;
}

.screenshots-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

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

.screenshot-card {
    flex-shrink: 0;
    scroll-snap-align: center;
    height: 340px;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
    transition: transform 0.3s ease;
}

.screenshot-card:hover {
    transform: scale(1.03);
}

.screenshot-card img {
    height: 100%;
    width: auto;
    display: block;
}

/* ---------- Download Section ---------- */
#download {
    text-align: center;
    min-height: 60vh;
}

.download-text {
    font-size: 1.2rem;
    color: var(--text-dim);
    margin-bottom: 40px;
}

/* ---------- Footer ---------- */
footer {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--cyan);
}

.copyright {
    color: #555;
    font-size: 0.8rem;
}

/* Hide mobile-3d-slot on desktop */
#mobile-3d-slot {
    display: none;
}

/* ---------- Scroll reveal animation ---------- */
.feature-card,
.rule,
.screenshot-card {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card.visible,
.rule.visible,
.screenshot-card.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Responsive ---------- */

/* Tablet */
@media (max-width: 900px) {
    #model-container {
        width: 40vw;
        opacity: 0.5;
    }

    .features-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

/* ============================================
   MOBILE — Dedicated Design (≤ 640px)
   ============================================ */
@media (max-width: 640px) {

    /* --- Hide fixed 3D, use inline slot instead --- */
    #model-container {
        display: none !important;
    }

    #mobile-3d-slot {
        display: block;
        width: 100%;
        height: 280px;
        margin: 20px 0 10px;
        border-radius: 20px;
        overflow: hidden;
        background: radial-gradient(ellipse at center, rgba(168, 85, 247, 0.08) 0%, transparent 70%);
    }

    /* --- Sections --- */
    .section {
        padding: 48px 7%;
        min-height: auto !important;
        justify-content: flex-start;
    }

    .section-title {
        font-size: 1.6rem;
        margin-bottom: 24px;
    }

    /* --- Hero: centered, title → 3D → tagline → CTA --- */
    #hero {
        min-height: auto;
        padding-top: 60px;
        padding-bottom: 20px;
        align-items: center;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .game-title {
        margin-bottom: 0;
    }

    .title-main {
        font-size: 2.6rem;
        letter-spacing: 2px;
    }

    .title-sub {
        font-size: 1.5rem;
        letter-spacing: 4px;
    }

    .title-3d {
        font-size: 1rem;
        padding: 3px 12px;
        margin-top: 6px;
    }

    .tagline {
        font-size: 0.95rem;
        margin-bottom: 24px;
        padding: 0 10px;
    }

    .cta-button {
        padding: 14px 28px;
        font-size: 0.85rem;
        width: 100%;
        justify-content: center;
        max-width: 300px;
    }

    /* --- Features: horizontal scroll cards --- */
    #features {
        padding-left: 0;
        padding-right: 0;
    }

    #features .section-title {
        padding: 0 7%;
    }

    .features-grid {
        display: flex !important;
        grid-template-columns: unset;
        gap: 14px;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        padding: 0 7%;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .features-grid::-webkit-scrollbar {
        display: none;
    }

    .feature-card {
        flex-shrink: 0;
        scroll-snap-align: center;
        width: 260px;
        padding: 28px 22px;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 20px;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }

    .feature-icon {
        font-size: 2.5rem;
        margin-bottom: 12px;
    }

    .feature-card h3 {
        font-size: 1.05rem;
        margin-bottom: 8px;
    }

    .feature-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    /* --- How to Play: compact rules --- */
    .rules-container {
        gap: 14px;
    }

    .rule {
        padding: 18px;
        gap: 14px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.06);
        border-radius: 14px;
    }

    .rule-number {
        width: 36px;
        height: 36px;
        font-size: 0.95rem;
    }

    .rule p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    /* --- Screenshots: full-width swipe --- */
    #screenshots {
        padding-left: 0;
        padding-right: 0;
        padding-bottom: 20px;
    }

    #screenshots .section-title {
        padding: 0 7%;
    }

    .screenshots-track {
        padding: 10px 7%;
        gap: 14px;
    }

    .screenshot-card {
        height: 200px;
        border-radius: 14px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    }

    /* --- Download: compact --- */
    #download {
        min-height: auto;
        text-align: center;
        padding-top: 32px;
        padding-bottom: 48px;
    }

    .download-text {
        font-size: 0.95rem;
        margin-bottom: 24px;
        padding: 0 5%;
    }

    .cta-large {
        padding: 16px 28px;
        font-size: 0.9rem;
        max-width: 300px;
    }

    /* --- Footer --- */
    footer {
        padding: 28px 16px;
    }

    .footer-links {
        gap: 24px;
    }

    .footer-links a {
        font-size: 0.8rem;
    }

    .copyright {
        font-size: 0.7rem;
    }

    /* --- Force all cards visible (no scroll reveal) --- */
    .feature-card,
    .rule,
    .screenshot-card {
        opacity: 1 !important;
        transform: translateY(0) !important;
    }
}