/* Pixel Eras WebGL demo page — the 4ssets storefront's look (unitycraft.org/4ssets/css/style.css). */

:root {
    --bg-top: #0a1628; --bg-mid: #071020; --bg-bottom: #030810;
    --accent: #E12D2D; --accent-dark: #A61B1B; --accent-light: #FF6B5E;
    --accent-glow: rgba(225, 45, 45, 0.25); --accent-glow-strong: rgba(225, 45, 45, 0.50);
    --glass-bg: rgba(255,255,255,0.04); --glass-bg-hover: rgba(255,255,255,0.07);
    --glass-border: rgba(255,255,255,0.08); --glass-border-hover: rgba(255,255,255,0.16);
    --text-primary: #f0f4ff; --text-secondary: #bec9e0; --text-muted: #6f81a3;
    --space-xs: 8px; --space-sm: 16px; --space-md: 24px; --space-lg: 40px; --space-xl: 64px;
    --max-width: 1120px; --radius-sm: 8px; --radius-md: 16px; --radius-lg: 24px;
    --transition-fast: 0.2s ease; --transition-base: 0.3s ease;
    --font-body: 'Roboto', system-ui, -apple-system, Segoe UI, sans-serif;
    --font-cta: 'Russo One', 'Roboto', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0; font-family: var(--font-body); color: var(--text-primary);
    background: linear-gradient(to bottom, #0a1220 0%, #070d18 55%, #04070d 100%);
    background-attachment: fixed; min-height: 100vh; line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; height: auto; }
[hidden] { display: none !important; }
kbd {
    display: inline-block; min-width: 1.6em; padding: 0 6px; margin: 0 1px;
    font: 600 0.78em/1.7 var(--font-body); text-align: center; color: var(--text-primary);
    background: rgba(255,255,255,0.06); border: 1px solid var(--glass-border-hover);
    border-bottom-width: 2px; border-radius: 5px;
}

/* Buttons */
.btn-primary {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px;
    background: linear-gradient(100deg, var(--accent-dark) 0%, var(--accent) 30%, var(--accent-light) 50%, var(--accent) 70%, var(--accent-dark) 100%);
    background-size: 220% 100%; background-position: 0% 50%; color: #fff;
    font-family: var(--font-cta); font-size: 0.92rem; font-weight: 400; letter-spacing: 0.03em;
    border: none; border-radius: var(--radius-sm); cursor: pointer; text-decoration: none; white-space: nowrap;
    box-shadow: 0 5px 16px var(--accent-glow), inset 0 1px 0 rgba(255,255,255,0.30), inset 0 -2px 4px rgba(90,0,0,0.35);
    transition: background-position var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
}
.btn-primary:hover { background-position: 100% 50%; box-shadow: 0 10px 34px var(--accent-glow-strong), inset 0 1px 0 rgba(255,255,255,0.30), inset 0 -2px 4px rgba(90,0,0,0.35); }
.btn-primary:active { transform: scale(0.97); }
.btn-secondary {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 26px;
    background: rgba(255,255,255,0.03); color: var(--text-primary); font: 500 0.95rem var(--font-body);
    border: 2px solid var(--glass-border-hover); border-radius: var(--radius-sm); cursor: pointer; text-decoration: none; white-space: nowrap;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-base), transform var(--transition-fast);
}
.btn-secondary:hover:not(:disabled) { color: #fff; background: rgba(225,45,45,0.10); border-color: var(--accent-dark); box-shadow: 0 8px 26px rgba(225,45,45,0.18); }
.btn-secondary:active:not(:disabled) { transform: scale(0.97); }
.btn-secondary:disabled { opacity: 0.4; cursor: default; }
.btn-small { padding: 8px 16px; font-size: 0.85rem; }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 1000; height: 64px;
    background: linear-gradient(90deg, rgba(12,18,28,0.90) 0%, rgba(24,30,42,0.80) 100%);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.site-header__inner { max-width: var(--max-width); margin: 0 auto; height: 100%; padding: 0 var(--space-md); display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand__logo { width: 38px; height: 38px; object-fit: contain; flex-shrink: 0; display: block; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__name { font-family: var(--font-cta); font-size: 1.25rem; letter-spacing: 0.01em; }
.brand__name b { color: var(--accent); font-weight: inherit; }
.brand__sub { font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.04em; }
.header__nav { display: flex; align-items: center; gap: 22px; }
.header__link { color: var(--text-secondary); text-decoration: none; font-size: 0.95rem; transition: color var(--transition-fast); }
.header__link:hover { color: #fff; }

/* Hero */
main { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-md); }
.hero {
    display: grid; grid-template-columns: minmax(0, 360px) minmax(0, 1fr); align-items: center; column-gap: var(--space-lg);
    padding: var(--space-md) 0 var(--space-md);
}
.hero .kicker { grid-column: 1 / -1; }
.kicker { margin: 0 0 14px; color: var(--accent); font-size: 0.76rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.hero__title { margin: 0; line-height: 0; }
.hero__logo { width: 100%; max-width: 360px; image-rendering: pixelated; image-rendering: crisp-edges; }
.hero__lead { max-width: 620px; margin: 0; color: var(--text-secondary); font-size: 1.05rem; }

/* Player */
.player { margin-bottom: var(--space-xl); }
.player__frame {
    position: relative; width: 100%; aspect-ratio: 16 / 9; max-height: calc(100vh - 150px);
    margin: 0 auto; overflow: hidden; border-radius: var(--radius-md);
    background: #03080f;
    border: 1px solid var(--glass-border-hover);
    box-shadow: 0 24px 70px rgba(0,0,0,0.55), 0 0 0 1px rgba(225,45,45,0.08);
}
/* The backdrop is blurred on its own layer, larger than the frame: a backdrop-filter on the
   overlay had nothing to blend at the frame's edges and left a light seam all round. */
/* Fullscreen is the frame, so the overlays and the backdrop come along. */
.player__frame:fullscreen { width: 100%; height: 100%; max-height: none; aspect-ratio: auto; border: 0; border-radius: 0; }
.player__frame::before {
    content: ""; position: absolute; inset: -24px;
    background: url("poster.webp") center / cover no-repeat;
    filter: blur(4px) brightness(0.8);
}
#unity-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; background: transparent; outline: none; }

.overlay {
    position: absolute; inset: 0; display: grid; place-items: center; padding: var(--space-md);
    background: radial-gradient(ellipse at center, rgba(3,8,16,0.55) 0%, rgba(3,8,16,0.88) 75%);
    transition: opacity 0.4s ease;
}
.overlay--done { opacity: 0; pointer-events: none; }
.overlay__card {
    width: min(100%, 460px); padding: var(--space-md) var(--space-lg); text-align: center;
    background: rgba(10,16,28,0.78); border: 1px solid var(--glass-border-hover); border-radius: var(--radius-md);
    box-shadow: 0 18px 50px rgba(0,0,0,0.5);
}
.overlay__mark { width: 64px; height: 64px; image-rendering: pixelated; margin-bottom: 6px; }
.overlay__title { margin: 0 0 14px; font-family: var(--font-cta); font-size: 1.15rem; letter-spacing: 0.02em; }
.overlay__text { margin: 0 0 16px; color: var(--text-secondary); font-size: 0.95rem; }
.overlay__tip { margin: 16px 0 0; min-height: 3em; color: var(--text-muted); font-size: 0.88rem; }
.overlay--error .overlay__title { color: var(--accent-light); }
.progress { height: 10px; padding: 2px; background: rgba(255,255,255,0.06); border: 1px solid var(--glass-border-hover); border-radius: 3px; }
.progress__bar {
    width: 0; height: 100%; border-radius: 1px;
    background: repeating-linear-gradient(90deg, var(--accent) 0 8px, var(--accent-light) 8px 10px);
    box-shadow: 0 0 12px var(--accent-glow-strong); transition: width 0.2s linear;
}

.player__bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 14px; }
.player__hint { margin: 0; color: var(--text-muted); font-size: 0.9rem; }
.banner { margin-top: 10px; }
.banner__line { padding: 10px 14px; margin-top: 6px; font-size: 0.88rem; color: var(--text-secondary); background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-sm); }
.banner__line--warning { border-color: rgba(255,186,32,0.45); color: #ffd98a; }

/* Sections */
.section { margin-bottom: var(--space-xl); }
.section__title { margin: 0 0 var(--space-md); font-size: 1.4rem; font-weight: 800; letter-spacing: -0.01em; }
.section--split { display: grid; grid-template-columns: 1.15fr 1fr; gap: var(--space-lg); }
.grid { display: grid; gap: var(--space-sm); }
/* Grid items may shrink below their content (the controls table scrolls instead of widening the page). */
.grid > *, .section--split > * { min-width: 0; }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card {
    padding: var(--space-md); background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md);
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}
.card:hover { background: var(--glass-bg-hover); border-color: var(--glass-border-hover); transform: translateY(-2px); }
.card h3 { margin: 0 0 8px; font-size: 1.05rem; font-weight: 700; }
.card p { margin: 0; color: var(--text-secondary); font-size: 0.93rem; }
.card__step { margin: 0 0 6px !important; font-family: var(--font-cta); font-size: 1.4rem !important; color: var(--accent) !important; }

.table-wrap { overflow-x: auto; border: 1px solid var(--glass-border); border-radius: var(--radius-md); background: var(--glass-bg); }
.controls { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.controls th { padding: 12px 14px; text-align: left; color: var(--text-muted); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; border-bottom: 1px solid var(--glass-border); }
.controls td { padding: 9px 14px; color: var(--text-secondary); border-bottom: 1px solid rgba(255,255,255,0.04); }
.controls td:first-child { color: var(--text-primary); }
.controls tr:last-child td { border-bottom: none; }
.list { margin: 0; padding: 0; list-style: none; }
.list li { position: relative; padding: 0 0 12px 22px; color: var(--text-secondary); }
.list li::before { content: ""; position: absolute; left: 2px; top: 0.6em; width: 8px; height: 8px; background: var(--accent); box-shadow: 0 0 8px var(--accent-glow-strong); }

/* Call to action */
.cta {
    display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); margin-bottom: var(--space-xl);
    padding: var(--space-lg); border-radius: var(--radius-lg);
    background: linear-gradient(120deg, rgba(225,45,45,0.14) 0%, rgba(255,255,255,0.03) 60%);
    border: 1px solid rgba(225,45,45,0.25);
}
.cta h2 { margin: 0 0 6px; font-family: var(--font-cta); font-weight: 400; font-size: 1.5rem; }
.cta p { margin: 0; color: var(--text-secondary); }
.cta__buttons { display: flex; gap: 12px; flex-wrap: wrap; flex-shrink: 0; }

/* Footer */
.site-footer { background: rgba(4,7,13,0.6); border-top: 1px solid rgba(255,255,255,0.05); }
.site-footer__inner { max-width: var(--max-width); margin: 0 auto; padding: var(--space-md); color: var(--text-muted); font-size: 0.88rem; }
.site-footer__inner p { margin: 4px 0; }
.site-footer a { color: var(--text-secondary); text-decoration: none; }
.site-footer a:hover { color: #fff; }
.site-footer__credits { font-size: 0.8rem; }

@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; row-gap: 16px; }
    .grid--4 { grid-template-columns: repeat(2, 1fr); }
    .grid--3 { grid-template-columns: repeat(2, 1fr); }
    .section--split { grid-template-columns: 1fr; }
    .cta { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 600px) {
    main, .site-header__inner, .site-footer__inner { padding-left: var(--space-sm); padding-right: var(--space-sm); }
    .grid--4, .grid--3 { grid-template-columns: 1fr; }
    .header__link { display: none; }
    .brand__sub { display: none; }
    .player__bar { flex-direction: column; align-items: flex-start; }
    .player__frame { border-radius: var(--radius-sm); }
    /* The loading card has a 16:9 frame the width of a phone to fit in. */
    .overlay { padding: 10px; }
    .overlay__card { padding: 12px 16px; }
    .overlay__mark, .overlay__tip { display: none; }
    .overlay__title { font-size: 0.95rem; margin-bottom: 8px; }
    .overlay__text { font-size: 0.82rem; margin-bottom: 10px; }
    .overlay .btn-primary { padding: 8px 16px; }
}