@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&family=JetBrains+Mono:ital,wght@0,400;0,700;1,400&family=Inter:wght@300;400;500;600&display=swap');

/* ── Reset & variables ───────────────────── */

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

:root {
  --bg:          #070d1a;
  --river:       #0d2757;
  --river-mid:   #1040a0;
  --bank:        #0a2e0a;
  --bank-light:  #1a5c1a;
  --yellow:      #f5c518;
  --cyan:        #18d4f5;
  --magenta:     #e040b0;
  --green:       #50c050;
  --red:         #e85050;
  --text:        #c8d8f0;
  --text-dim:    #4a6080;
  --border:      #162448;
}

html {
  scrollbar-color: var(--river-mid) var(--bg);
}

/* ── Body ────────────────────────────────── */

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  min-height: 100vh;
}

/* Riverbank strips — index page only */
body.GameIndex::before {
  content: '';
  position: fixed;
  inset: 0;
  background: linear-gradient(
    90deg,
    var(--bank)       0%,
    var(--bank-light) 6%,
    transparent       18%,
    transparent       82%,
    var(--bank-light) 94%,
    var(--bank)       100%
  );
  z-index: -1;
  pointer-events: none;
}

body.GameIndex::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse 60% 80% at 50% 40%,
    rgba(16, 64, 160, 0.15) 0%,
    transparent 70%
  );
  z-index: -1;
  pointer-events: none;
}

/* ── Header bar (all non-index pages) ───── */

table.header {
  display: block;
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 26, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  font-size: inherit;
  font-weight: normal;
}

table.header tbody {
  display: block;
}

table.header tr {
  display: flex;
  align-items: center;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

table.header td {
  font-size: inherit;
  font-weight: normal;
  padding: 14px 0;
  vertical-align: middle;
}

td.logo {
  flex: 0 0 auto;
  margin-right: auto;
}

td.logo a {
  font-family: 'Press Start 2P', monospace;
  font-size: 10px;
  color: var(--yellow);
  text-decoration: none;
  text-shadow: 0 0 10px rgba(245, 197, 24, 0.4);
}

td.page-header {
  flex: 0 0 auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ── Page content wrapper ────────────────── */

.page-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 32px 0;
}

/* ── Index layout ────────────────────────── */

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 32px;
}

header {
  padding: 72px 0 48px;
  text-align: center;
}

.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--cyan);
  opacity: 0.7;
  margin-bottom: 28px;
}

.game-title {
  font-family: 'Press Start 2P', monospace;
  font-size: clamp(24px, 5.5vw, 52px);
  color: var(--yellow);
  text-shadow:
    0 0 24px rgba(245, 197, 24, 0.55),
    0 0 64px rgba(245, 197, 24, 0.18),
    3px 3px 0 rgba(0, 0, 0, 0.7);
  line-height: 1.4;
}

.subtitle {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 300;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 22px;
}

.river-divider {
  position: relative;
  height: 2px;
  margin: 48px 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--river-mid) 20%,
    var(--cyan) 50%,
    var(--river-mid) 80%,
    transparent 100%
  );
}

.river-divider::after {
  content: '';
  position: absolute;
  top: -3px;
  left: 50%;
  transform: translateX(-50%);
  width: 8px;
  height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--cyan);
}

/* ── Index navigation ────────────────────── */

nav {
  padding-bottom: 72px;
}

.section {
  --section-color: var(--cyan);
  margin-bottom: 40px;
}

nav .section:nth-child(1) { --section-color: var(--cyan); }
nav .section:nth-child(2) { --section-color: var(--magenta); }
nav .section:nth-child(3) { --section-color: var(--yellow); }
nav .section:nth-child(4) { --section-color: var(--green); }

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--section-color);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--section-color), transparent);
  opacity: 0.3;
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 8px;
}

.link-card {
  display: block;
  padding: 16px 18px;
  background: rgba(13, 39, 87, 0.45);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: background 0.12s, border-color 0.12s, transform 0.12s;
  position: relative;
  overflow: hidden;
}

.link-card::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--section-color);
  transform: scaleY(0);
  transform-origin: center;
  transition: transform 0.12s;
  border-radius: 6px 0 0 6px;
}

.link-card:hover {
  background: rgba(20, 55, 130, 0.65);
  border-color: var(--section-color);
  color: var(--text);
  transform: translateX(5px);
}

.link-card:hover::before {
  transform: scaleY(1);
}

/* ── ASM navigation ──────────────────────── */

table.asm-navigation {
  width: 100%;
  margin-bottom: 0;
  margin-top: 12px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-collapse: collapse;
}

table.asm-navigation td {
  background: transparent;
  padding: 8px 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
}

table.asm-navigation a {
  color: var(--cyan);
}

table.asm-navigation td.prev { width: 30%; text-align: left; }
table.asm-navigation td.up   { width: 40%; text-align: center; }
table.asm-navigation td.next { width: 30%; text-align: right; }

/* ── Routine description ─────────────────── */

div.description {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--yellow);
  margin: 24px 0 0;
  padding: 11px 16px;
  background: rgba(13, 39, 87, 0.35);
  border-left: 3px solid var(--yellow);
  border-radius: 0 4px 4px 0;
}

div.details {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
  padding: 4px 0;
}

div.comments {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
  padding: 8px 0 4px;
}

div.paragraph {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
}

/* ── Disassembly table ───────────────────── */

table.disassembly {
  width: 100%;
  border-collapse: collapse;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 24px;
}

td.routine-comment {
  padding: 4px 0;
  font-family: 'Inter', sans-serif;
  color: var(--text);
  border: none;
}

td.address-1 {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-dim);
  vertical-align: top;
  padding: 1px 14px 1px 0;
  white-space: pre;
  font-size: 12px;
}

td.address-2 {
  font-family: 'JetBrains Mono', monospace;
  color: var(--red);
  font-weight: 700;
  vertical-align: top;
  padding: 1px 14px 1px 0;
  white-space: pre;
  font-size: 12px;
}

td.asm-label {
  font-family: 'JetBrains Mono', monospace;
  color: var(--cyan);
  font-weight: 700;
  vertical-align: top;
  padding: 1px 14px 1px 0;
  white-space: pre;
}

td.bytes {
  font-family: 'JetBrains Mono', monospace;
  color: #787840;
  vertical-align: top;
  padding: 1px 14px 1px 0;
  white-space: pre;
  font-size: 11px;
}

td.instruction {
  font-family: 'JetBrains Mono', monospace;
  color: #5a7868; /* punctuation / unrecognised tokens */
  vertical-align: top;
  padding: 1px 14px 1px 0;
  white-space: pre;
}

/* Z80 syntax highlighting tokens */
td.instruction .hljs-keyword  { color: #6fdd8f; } /* mnemonics  */
td.instruction .hljs-built_in { color: var(--cyan); }   /* registers  */
td.instruction .hljs-number   { color: var(--yellow); } /* immediates */
td.instruction .hljs-string   { color: var(--magenta); }
td.instruction .hljs-comment  { color: var(--text-dim); font-style: italic; }

td.comment-0 {
  color: var(--text-dim);
  vertical-align: top;
  padding: 1px 0;
  font-family: 'JetBrains Mono', monospace;
  font-style: italic;
  font-size: 12px;
}

td.comment-1 {
  color: var(--text);
  background: rgba(13, 39, 87, 0.25);
  border-left: 1px solid rgba(24, 212, 245, 0.12);
  border-top: 1px solid rgba(24, 212, 245, 0.1);
  border-bottom: 1px solid rgba(24, 212, 245, 0.1);
  padding: 1px 14px;
  vertical-align: top;
  width: 45%;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  line-height: 1.6;
}

table.disassembly tr.asm-group-hover > td {
  background: rgba(24, 212, 245, 0.05);
}

table.disassembly tr.asm-group-hover > td.comment-1 {
  background: rgba(24, 212, 245, 0.1);
  border-left-color: rgba(24, 212, 245, 0.45);
}

span.register {
  color: var(--cyan);
  font-family: 'JetBrains Mono', monospace;
}

/* ── Input/output register tables ─────────── */

table.input,
table.output {
  border-collapse: collapse;
  margin-bottom: 14px;
}

table.input th,
table.output th {
  background: rgba(13, 39, 87, 0.6);
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 5px 12px;
  text-align: left;
}

table.input td,
table.output td {
  background: rgba(13, 39, 87, 0.3);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  padding: 4px 12px;
}

td.register {
  color: var(--cyan);
  width: auto;
  text-align: center;
  white-space: nowrap;
}

/* ── Memory map tables ───────────────────── */

div.map-intro {
  margin-bottom: 16px;
}

table.map {
  width: 100%;
  border-collapse: collapse;
}

table.map th {
  background: rgba(13, 39, 87, 0.6);
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 10px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table.map th.map-length {
  text-align: center;
}

table.map tr:nth-child(odd)  td { background: rgba(10, 20, 50, 0.35); }
table.map tr:nth-child(even) td { background: rgba(13, 39, 87, 0.35); }

table.map td {
  padding: 7px 16px;
  vertical-align: top;
  border-bottom: 1px solid rgba(22, 36, 72, 0.4);
  font-size: 14px;
}

/* Address cells by entry type */
td.map-c, td.map-g, td.map-b, td.map-w, td.map-s, td.map-u,
td.map-page, td.map-byte {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  white-space: nowrap;
}

td.map-c { color: var(--cyan); }
td.map-g { color: var(--yellow); }
td.map-b, td.map-w { color: var(--green); }
td.map-s, td.map-u { color: var(--text-dim); }
td.map-page, td.map-byte { color: var(--text-dim); text-align: center; }

td.map-length {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  white-space: nowrap;
}

/* Description cells — color only applied to address column above;
   description text uses consistent neutral tone */
td.map-c-desc,
td.map-g-desc,
td.map-b-desc,
td.map-w-desc,
td.map-s-desc,
td.map-u-desc,
td.map-t-desc { color: var(--text); }

div.map-entry-title-10 {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

div.map-entry-title-11 {
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

div.map-entry-desc {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 3px;
  line-height: 1.5;
}

/* ── Box entries (facts, notes, bugs…) ───── */

div.box {
  background: rgba(13, 39, 87, 0.3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 14px;
  width: auto;
}

div.box-1 {
  background: rgba(13, 39, 87, 0.3);
}

div.box-2 {
  background: rgba(8, 18, 50, 0.4);
  border-color: rgba(22, 36, 72, 0.7);
}

div.box-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}

div.box p {
  margin-bottom: 0;
}

/* ── List entries (graphics…) ────────────── */

div.list-entry {
  background: rgba(13, 39, 87, 0.3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 14px;
  width: auto;
}

div.list-entry-1 { background: rgba(13, 39, 87, 0.3); }
div.list-entry-2 { background: rgba(8, 18, 50, 0.4); }

div.list-entry-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--yellow);
  margin-bottom: 8px;
}

div.list-entry-desc {
  font-size: 14px;
  color: var(--text);
  margin-top: 6px;
  line-height: 1.6;
}

ul.list-entry {
  margin-top: 8px;
  margin-bottom: 0;
  padding-left: 20px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
}

/* ── Default content tables ──────────────── */

table.default {
  border-collapse: collapse;
  margin: 10px 0;
}

table table.default th,
table.default th {
  background: rgba(13, 39, 87, 0.6);
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 7px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

table table.default td,
table.default td {
  background: rgba(13, 39, 87, 0.25);
  color: var(--text);
  font-size: 13px;
  padding: 6px 14px;
  border-bottom: 1px solid rgba(22, 36, 72, 0.35);
}

td.centre { text-align: center; }

/* ── Contents list ───────────────────────── */

ul.contents {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

ul.contents li a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--cyan);
  text-decoration: none;
  padding: 5px 11px;
  background: rgba(13, 39, 87, 0.4);
  border: 1px solid var(--border);
  border-radius: 4px;
  display: block;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}

ul.contents li a:hover {
  background: rgba(20, 55, 130, 0.6);
  border-color: var(--cyan);
  color: var(--yellow);
}

/* ── Images (sprites) ────────────────────── */

img {
  border: 0;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

/* ── Audio controls ──────────────────────── */

audio {
  display: block;
  width: 100%;
  max-width: 380px;
  height: 36px;
  margin: 10px 0;
  accent-color: var(--cyan);
  filter: invert(1) hue-rotate(165deg) brightness(0.85);
}

/* ── Links ───────────────────────────────── */

a {
  color: var(--cyan);
  text-decoration: none;
  transition: color 0.1s;
}

a:hover,
a.map-entry-title:hover {
  color: var(--yellow);
}

a.map-entry-title {
  color: inherit;
}

/* ── Footer ──────────────────────────────── */

footer {
  clear: both;
  margin-top: 48px;
  padding: 20px 0 32px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
}

footer .release,
footer .copyright {
  display: none;
}

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

footer a:hover {
  color: var(--yellow);
}