/* Litirnir á síðunni. Breyttu þeim hér og þá breytist öll síðan! */
:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #5cc85c;        /* grasgrænn */
  --accent-bright: #8be08b;
  --font-body: "Inter", system-ui, sans-serif;
  --font-display: "Silkscreen", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent-bright);
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(92, 200, 92, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92, 200, 92, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

.container {
  width: min(1000px, 92%);
  margin: 0 auto;
}

main,
.header,
.footer {
  position: relative;
  z-index: 1;
}

/* Efst á síðunni */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 1.1rem;
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--text);
}

/* Stóra fyrirsögnin */
.hero {
  padding: 96px 0 72px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: var(--accent-bright);
  font-family: var(--font-display);
  font-size: 0.75rem;
  margin-bottom: 20px;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 7vw, 3.5rem);
  margin-bottom: 16px;
}

.highlight {
  color: var(--accent);
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Kaflar */
.section {
  padding: 56px 0;
}

h2 {
  font-size: clamp(1.4rem, 4vw, 2rem);
  margin-bottom: 24px;
}

.about-card,
.build-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}

.facts {
  list-style: none;
  margin-top: 16px;
  display: grid;
  gap: 8px;
}

.facts span {
  display: inline-block;
  width: 1.6em;
}

.builds {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.build-card {
  transition: transform 0.15s, border-color 0.15s;
}

.build-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.build-icon {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.build-card h3 {
  margin-bottom: 8px;
}

.build-card p {
  color: var(--text-muted);
}

/* Neðst á síðunni */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  margin-top: 40px;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* Snake-leikurinn */
.snake-lysing {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.snake-stada {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  justify-content: space-between;
  max-width: 480px;
  margin: 0 auto 10px;
  font-family: var(--font-display);
}

.snake-leikur {
  position: relative;
  max-width: 480px;
  margin: 0 auto;
  border: 4px solid #3b2a1a; /* eins og viðarkubbur */
  box-shadow: 0 0 0 4px #6b4a2b;
  cursor: pointer;
  touch-action: none;
}

#snake-canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
}

.snake-skilabod {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px;
  text-align: center;
  background: rgba(0, 0, 0, 0.55);
}

.snake-skilabod[hidden] {
  display: none;
}

.snake-skilabod strong {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.8rem;
  color: #fff;
  text-shadow: 3px 3px 0 #3f3f3f;
}

.snake-skilabod span {
  color: #ddd;
}

.snake-takkar {
  display: grid;
  grid-template-columns: repeat(3, 56px);
  grid-template-areas:
    ". upp ."
    "vinstri nidur haegri";
  gap: 6px;
  justify-content: center;
  margin-top: 16px;
}

.snake-takkar button {
  height: 56px;
  font-size: 1.3rem;
  color: #fff;
  background: #7d7d7d; /* eins og steinn */
  border: 3px solid;
  border-color: #a9a9a9 #4a4a4a #4a4a4a #a9a9a9;
  cursor: pointer;
}

.snake-takkar button:active {
  border-color: #4a4a4a #a9a9a9 #a9a9a9 #4a4a4a;
}

.takki-upp { grid-area: upp; }
.takki-vinstri { grid-area: vinstri; }
.takki-nidur { grid-area: nidur; }
.takki-haegri { grid-area: haegri; }