/* Public website for Build the Periodic Table. Colours and fonts match the game (src/styles/index.css,
   Game.css). Fonts are served from this site (no Google request), same files as the game. */
@font-face {
  font-family: 'Orbitron';
  font-style: normal;
  font-weight: 400 900;
  font-display: swap;
  src: url('fonts/orbitron-latin.woff2') format('woff2');
}
@font-face {
  font-family: 'Share Tech Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/share-tech-mono-latin.woff2') format('woff2');
}

:root {
  color-scheme: dark;
  --bg: #0a0e27;
  --panel: #0f1729;
  --panel-2: #0f2847;
  --line: #1f3857;
  --text: #e0f7ff;
  --muted: #a9bccb;
  --cyan: #00d9ff;
  --green: #00ff88;
  --amber: #ffb020;
  --radius: 14px;
  --display: 'Orbitron', system-ui, sans-serif;
  --mono: 'Share Tech Mono', ui-monospace, monospace;
  --body: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--body);
}

a { color: var(--cyan); text-underline-offset: 3px; }
a:hover { color: var(--green); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
}

h1, h2, h3 { font-family: var(--display); line-height: 1.2; letter-spacing: .01em; }
h1 { font-size: clamp(1.7rem, 5vw, 2.6rem); margin: 0 0 .6rem; }
h2 { font-size: clamp(1.15rem, 3vw, 1.45rem); margin: 2.2rem 0 .6rem; }
h3 { font-size: 1.02rem; margin: 0 0 .4rem; }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 16px; top: 8px; background: var(--panel); padding: .4rem .8rem; z-index: 10; }

/* Header */
.site-header {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .6rem 1.2rem;
  padding: .9rem 16px; border-bottom: 1px solid var(--line); background: rgba(10, 14, 39, .92);
  position: sticky; top: 0; z-index: 5; backdrop-filter: blur(8px);
}
.brand { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--text); }
.brand-tile {
  display: grid; place-items: center; width: 2.1rem; height: 2.1rem; border-radius: 7px;
  background: var(--cyan); color: var(--bg); font: 800 .95rem var(--display);
}
.brand-name { font: 800 .95rem var(--display); color: var(--cyan); text-shadow: 0 0 12px rgba(0, 217, 255, .35); }
.site-header nav { display: flex; flex-wrap: wrap; gap: .2rem .9rem; }
.site-header nav a { color: var(--muted); text-decoration: none; font: .95rem var(--mono); padding: .2rem 0; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--cyan); }
.site-header nav a[aria-current="page"] { border-bottom: 2px solid var(--cyan); }

/* Layout */
main { padding: 0 16px 3rem; }
main.narrow { max-width: 44rem; margin: 2rem auto 0; }
main.wide { max-width: 68rem; margin: 0 auto; }
.updated, .fine { color: var(--muted); font-size: .9rem; }
ul { padding-left: 1.3rem; }
li { margin: .3rem 0; }

/* Hero */
.hero {
  margin: 0 -16px; padding: clamp(3rem, 10vw, 6.5rem) 16px clamp(2.5rem, 8vw, 5rem);
  background:
    linear-gradient(180deg, rgba(10, 14, 39, .05) 0%, rgba(10, 14, 39, .25) 50%, rgba(10, 14, 39, .7) 85%, var(--bg) 100%),
    url('images/Sapphire_Lake.webp') center 40% / cover no-repeat;
  text-align: center;
}
.hero h1 {
  /* Same look as the game's title screen (Game.css .title-content h1): cyan, heavy, glowing. The dark
     shadows keep it readable over the light background. */
  font-size: clamp(2rem, 7.5vw, 3.6rem); font-weight: 900; letter-spacing: .04em; color: var(--cyan);
  text-shadow: 0 2px 0 rgba(10, 14, 39, .8), 0 0 20px rgba(0, 217, 255, .5), 0 0 40px rgba(0, 217, 255, .3),
    0 4px 24px rgba(10, 14, 39, .8);
}
.hero .lead { font-size: clamp(1.05rem, 2.6vw, 1.3rem); max-width: 38rem; margin: 0 auto 1rem; color: #fff; text-shadow: 0 1px 2px rgba(10, 14, 39, .8), 0 2px 14px rgba(10, 14, 39, .8); }
.hero .grades {
  font: 1rem var(--mono); color: var(--text); margin: 0 auto 1.6rem; max-width: 36rem;
  display: inline-block; padding: .35rem .9rem; border-radius: 999px; background: rgba(10, 14, 39, .6);
}
.cta-row { display: flex; flex-wrap: wrap; gap: .8rem; justify-content: center; }
.button {
  display: inline-block; padding: .8rem 1.3rem; border-radius: 999px; font: 700 .95rem var(--display);
  text-decoration: none; border: 2px solid var(--cyan); color: var(--bg); background: var(--cyan); cursor: pointer;
}
.button:hover { background: var(--green); border-color: var(--green); color: var(--bg); }
.button.ghost { background: rgba(10, 14, 39, .6); color: var(--cyan); }
.button.ghost:hover { color: var(--bg); }
.badge-soon {
  display: inline-block; padding: .8rem 1.3rem; border-radius: 999px; font: 700 .95rem var(--display);
  border: 2px dashed var(--muted); color: var(--text); background: rgba(10, 14, 39, .6);
}

/* Element blocks: pictures drawn by the game's own code (scripts/render-website-blocks.sh) */
.tiles { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: .4rem; margin: 2.2rem 0 .4rem; }
.tiles img {
  width: 7.2rem; height: 7.2rem; transform: rotate(var(--tilt, 0deg));
  filter: drop-shadow(0 8px 10px rgba(10, 14, 39, .45));
}

/* Feature cards */
.section-intro { text-align: center; max-width: 40rem; margin: 3rem auto 1.4rem; }
.section-intro p { color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(15.5rem, 1fr)); gap: 1rem; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.2rem 1.25rem;
}
.card p { margin: 0; color: var(--muted); }
.card .icon { font: 700 1.4rem var(--display); color: var(--green); display: block; margin-bottom: .4rem; }

.band {
  margin: 3rem 0 0; padding: 1.6rem 1.4rem; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--panel-2), var(--panel)); border: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; justify-content: space-between;
}
.band h2 { margin: 0 0 .3rem; }
.band p { margin: 0; color: var(--muted); max-width: 36rem; }

/* Steps */
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; position: relative; padding-left: 2.8rem; margin: 0 0 1rem; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: .05rem; width: 2rem; height: 2rem; border-radius: 50%;
  display: grid; place-items: center; background: var(--cyan); color: var(--bg); font: 800 .9rem var(--display);
}

.note { border-left: 3px solid var(--amber); padding: .6rem 1rem; background: var(--panel); border-radius: 0 8px 8px 0; }

/* Form */
form.pilot { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.3rem; margin-top: 1rem; }
.field { margin: 0 0 1rem; }
.field label { display: block; font: .95rem var(--mono); margin-bottom: .3rem; }
.field .hint { font-weight: 400; color: var(--muted); }
input[type="text"], input[type="email"], textarea, select {
  width: 100%; padding: .7rem .8rem; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font: 1rem var(--body);
}
textarea { min-height: 6rem; resize: vertical; }
.check { display: flex; gap: .6rem; align-items: flex-start; margin: 0 0 1.2rem; }
.check input { margin-top: .35rem; width: 1.1rem; height: 1.1rem; flex: none; }
.hidden { position: absolute; left: -9999px; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line); padding: 1.6rem 16px 2.4rem; text-align: center; color: var(--muted); font-size: .95rem;
}
.site-footer p { margin: .3rem 0; }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .two-col { grid-template-columns: 1fr; }
  .tiles { gap: .1rem; }
  .tiles img { width: 3.3rem; height: 3.3rem; }
}

@media (prefers-reduced-motion: no-preference) {
  .tiles img { transition: transform .25s ease; }
  .tiles img:hover { transform: rotate(0deg) translateY(-6px); }
}