/* ERA 0: Archaeological — sandy Egyptian stone, papyrus, desert light */
:root {
  --bg:           #f5edd6;
  --bg2:          #ede4c8;
  --surface:      #faf4e4;
  --surface2:     #f0e8ce;
  --surface3:     #e8debb;
  --border:       #c8a96e;
  --border2:      #b08848;
  --text:         #3a2810;
  --text-dim:     #7a5c32;
  --text-bright:  #1a1005;
  --text-faint:   #c0a070;

  --accent:       #b5722a;
  --accent-dim:   #f0e0c0;
  --accent2:      #8b5a14;
  --gold:         #c8960c;
  --gold-dim:     #f8ecc0;
  --green:        #4a7840;
  --green-dim:    #d8e8d0;
  --red:          #a03020;
  --red-dim:      #f0d0c8;
  --teal:         #3a7868;
  --teal-dim:     #cce8e0;

  --font-display: 'Cinzel', serif;
  --font-body:    'Crimson Pro', Georgia, serif;
  --font-mono:    'Courier Prime', 'Courier New', monospace;
  --font-ui:      'Rajdhani', sans-serif;

  --radius:       2px;
  --radius-md:    4px;
  --radius-lg:    6px;
}

/* ERA 1: Transitional — teal circuits emerging from carved stone */
.era-1 {
  --bg:           #060d0e;
  --bg2:          #081212;
  --surface:      #0c1a1c;
  --surface2:     #102224;
  --surface3:     #142c2e;
  --border:       #1e4a4e;
  --border2:      #286468;
  --text:         #9ecfcc;
  --text-dim:     #4a8a86;
  --text-bright:  #d4f0ee;
  --text-faint:   #1e4a4e;

  --accent:       #3ab8b0;
  --accent-dim:   #082422;
  --accent2:      #c9a227;
  --gold:         #d4aa30;
  --gold-dim:     #2a2008;
  --green:        #5ab888;
  --green-dim:    #0a2018;
  --red:          #c84040;
  --red-dim:      #2a0808;
  --teal:         #3ab8b0;
  --teal-dim:     #082422;

  --font-display: 'Rajdhani', 'Cinzel', sans-serif;
  --font-body:    'Rajdhani', sans-serif;
  --font-mono:    'Share Tech Mono', 'Courier Prime', monospace;
  --font-ui:      'Rajdhani', sans-serif;
}

/* ERA 2: Cyberpunk — full neon digital */
.era-2 {
  --bg:           #050508;
  --bg2:          #08080e;
  --surface:      #0c0c16;
  --surface2:     #121220;
  --surface3:     #1a1a2e;
  --border:       #1e1e3a;
  --border2:      #2a2a4a;
  --text:         #c8c8e8;
  --text-dim:     #5a5a7a;
  --text-bright:  #e8e8ff;
  --text-faint:   #1e1e3a;

  --accent:       #00d4ff;
  --accent-dim:   #004455;
  --accent2:      #aa55ff;
  --gold:         #ffaa00;
  --gold-dim:     #332200;
  --green:        #00ff88;
  --green-dim:    #003322;
  --red:          #ff3355;
  --red-dim:      #330011;
  --teal:         #00d4ff;
  --teal-dim:     #004455;

  --font-display: 'Orbitron', 'Share Tech Mono', monospace;
  --font-body:    'Rajdhani', sans-serif;
  --font-mono:    'Share Tech Mono', monospace;
  --font-ui:      'Rajdhani', sans-serif;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  transition: background 1.2s ease, color 0.8s ease;
}

/* Subtle papyrus grain texture for era-0 */
body:not(.era-1):not(.era-2)::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9000;
  opacity: 0.6;
}

::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 2px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

.screen { display: none; width: 100%; min-height: 100vh; }
.screen.active { display: flex; flex-direction: column; }
#game-screen { height: 100vh; overflow: hidden; }


/* PROLOGUE */

#prologue-screen {
  position: relative;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  overflow: hidden;
}

.prologue-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(181,114,42,0.12) 0%, transparent 70%),
    repeating-linear-gradient(
      0deg, transparent, transparent 48px,
      rgba(176,136,72,0.08) 48px, rgba(176,136,72,0.08) 49px
    ),
    repeating-linear-gradient(
      90deg, transparent, transparent 48px,
      rgba(176,136,72,0.05) 48px, rgba(176,136,72,0.05) 49px
    );
  pointer-events: none;
}

.prologue-dust {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.prologue-dust::before,
.prologue-dust::after {
  content: '';
  position: absolute;
  width: 2px; height: 2px;
  background: var(--accent);
  border-radius: 50%;
  animation: drift 10s infinite linear;
  opacity: 0.25;
  box-shadow:
    120px 200px 0 rgba(181,114,42,0.25),
    300px 80px 0 rgba(181,114,42,0.18),
    500px 350px 0 rgba(181,114,42,0.12),
    700px 150px 0 rgba(181,114,42,0.2),
    900px 420px 0 rgba(181,114,42,0.15),
    200px 480px 0 rgba(181,114,42,0.1),
    850px 60px 0 rgba(181,114,42,0.22);
}

.prologue-dust::after {
  animation-delay: -5s;
  box-shadow:
    80px 320px 0 rgba(181,114,42,0.18),
    400px 180px 0 rgba(181,114,42,0.12),
    620px 90px 0 rgba(181,114,42,0.22),
    760px 380px 0 rgba(181,114,42,0.2);
}

@keyframes drift {
  0%   { transform: translateY(100vh) translateX(0); opacity: 0; }
  10%  { opacity: 0.35; }
  90%  { opacity: 0.15; }
  100% { transform: translateY(-100px) translateX(40px); opacity: 0; }
}

.prologue-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 680px;
  padding: 40px 40px;
  border: 1px solid var(--border);
  background: rgba(250,244,228,0.88);
  /* faint outer border suggesting a carved frame */
  box-shadow: 0 0 0 4px rgba(176,136,72,0.12), inset 0 0 40px rgba(181,114,42,0.04);
}

.prologue-emblem {
  font-size: 28px;
  color: var(--gold);
  margin-bottom: 12px;
  animation: emblemPulse 3s ease-in-out infinite;
}

@keyframes emblemPulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50%       { opacity: 1; transform: scale(1.06); }
}

.prologue-subtitle {
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 6px;
  color: var(--text-dim);
  margin-bottom: 20px;
}

.prologue-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 900;
  color: var(--text-bright);
  line-height: 1.15;
  margin-bottom: 8px;
}

.prologue-title span {
  color: var(--accent);
  font-style: italic;
}

.prologue-divider {
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border2), transparent);
  margin: 20px auto;
}

.prologue-text {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--text);
  line-height: 1.9;
  text-align: left;
  min-height: 140px;
  font-style: italic;
  margin-bottom: 28px;
}

.prologue-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.prologue-page {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}


/* BUTTONS */

.btn-ancient {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 10px 28px;
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 3px;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.btn-ancient::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
  z-index: 0;
}

.btn-ancient:hover::before { transform: scaleX(1); }
.btn-ancient:hover { color: var(--surface); }
.btn-ancient > * { position: relative; z-index: 1; }

.btn-close {
  background: transparent;
  border: 1px solid var(--border2);
  color: var(--text-dim);
  padding: 8px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-close:hover { border-color: var(--red); color: var(--red); }


/* HEADER */

#header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: 16px;
  transition: background 1s ease, border-color 0.8s ease;
}

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { color: var(--gold); font-size: 16px; }

.logo-text {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 900;
  color: var(--text-bright);
  letter-spacing: 3px;
}

.logo-era {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--text-dim);
}

.header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  flex: 1;
  max-width: 400px;
}

.arc-indicator {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--accent);
}

.progress-track {
  width: 100%;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  border-radius: 2px;
  transition: width 0.6s ease;
  width: 0%;
}

.progress-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.shard-display {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--gold-dim);
  border: 1px solid var(--border2);
  border-radius: 20px;
  padding: 4px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gold);
  transition: all 0.3s;
}
.shard-display.gained { animation: shardGain 0.5s ease; }
@keyframes shardGain { 0%,100%{transform:scale(1)} 50%{transform:scale(1.1)} }

.shard-gem { font-size: 12px; }
.shard-label { font-size: 9px; letter-spacing: 2px; color: var(--text-dim); }

.streak-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  transition: all 0.3s;
}
.streak-pill.hot { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }

.hdr-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 5px 10px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 1px;
  transition: all 0.2s;
  border-radius: var(--radius);
}
.hdr-btn:hover { border-color: var(--accent); color: var(--accent); }


/* LAYOUT */

#main-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
}

#sidebar {
  width: 200px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  padding: 12px;
  transition: background 1s ease;
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--text-faint);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

#git-graph {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  padding: 4px 8px;
}

.gn-row {
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
}

.gn-track {
  width: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.gn-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--surface);
  flex-shrink: 0;
  transition: background 0.4s;
}
.gn-dot.branch  { background: var(--teal); }
.gn-dot.merge   { background: var(--green); }
.gn-dot.current { background: var(--gold); animation: nodePulse 1.5s ease-in-out infinite; }

@keyframes nodePulse { 0%,100%{opacity:0.65} 50%{opacity:1} }

.gn-line {
  width: 2px;
  height: 16px;
  background: var(--border2);
  margin: 0 auto;
}

.gn-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 130px;
}

#content-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}


/* STORY PANEL */

#story-panel {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  flex-shrink: 0;
  transition: background 1s ease;
}

.story-top { margin-bottom: 12px; }

.chapter-badge-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.chapter-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: var(--radius);
}

.arc-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  padding: 2px 8px;
  border-radius: var(--radius);
}

.qtype-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  padding: 2px 8px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.qtype-terminal { background: var(--green-dim); color: var(--green);  border-color: var(--green); }
.qtype-binary   { background: var(--teal-dim);  color: var(--teal);   border-color: var(--teal); }
.qtype-choice   { background: var(--accent-dim);color: var(--accent); border-color: var(--accent); }
.qtype-sort     { background: var(--gold-dim);  color: var(--gold);   border-color: var(--gold); }
.qtype-match    { background: var(--green-dim); color: var(--green);  border-color: var(--green); }
.qtype-fill     { background: var(--surface2);  color: var(--text-dim); }
.qtype-conflict { background: var(--red-dim);   color: var(--red);    border-color: var(--red); }

.chapter-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: 1px;
}

.story-body {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.story-icon {
  color: var(--gold);
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 4px;
  opacity: 0.65;
}

.story-narrative {
  font-family: var(--font-body);
  font-size: 15px;
  font-style: italic;
  color: var(--text);
  line-height: 1.85;
  flex: 1;
}

.task-box {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-bright);
}

.task-label {
  color: var(--accent);
  font-size: 10px;
  letter-spacing: 3px;
  flex-shrink: 0;
  padding-top: 1px;
}


/* QUESTION ZONE */

#question-zone {
  flex: 1;
  overflow-y: auto;
  padding: 20px 24px;
  background: var(--bg2);
  transition: background 1s ease;
}


/* TERMINAL */

.terminal-wrap {
  background: #1a1208;
  border: 1px solid var(--border2);
  border-radius: var(--radius-md);
  overflow: hidden;
  font-family: var(--font-mono);
}

/* era-1 and era-2 terminals go fully dark */
.era-1 .terminal-wrap,
.era-2 .terminal-wrap { background: #000; }

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}

.tdot { width: 9px; height: 9px; border-radius: 50%; }
.tdot-r { background: var(--red); }
.tdot-y { background: var(--gold); }
.tdot-g { background: var(--green); }

.terminal-label {
  font-size: 10px;
  color: var(--text-dim);
  margin-left: 6px;
  letter-spacing: 1px;
}

#terminal-output {
  padding: 10px 14px;
  min-height: 100px;
  max-height: 180px;
  overflow-y: auto;
  font-size: 13px;
  line-height: 1.7;
}

.tl { margin: 1px 0; }
.tl-dim     { color: #8a7050; }
.tl-success { color: var(--green); }
.tl-error   { color: var(--red); }
.tl-info    { color: var(--accent); }
.tl-hint    { color: var(--gold); }

.era-1 .tl-dim, .era-2 .tl-dim { color: #555; }

.terminal-input-row {
  display: flex;
  align-items: center;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  background: rgba(0,0,0,0.15);
}

.era-1 .terminal-input-row,
.era-2 .terminal-input-row { background: #000; }

.term-prompt { color: var(--green); font-size: 13px; margin-right: 6px; white-space: nowrap; }

#user-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--gold); 
  font-family: var(--font-mono);
  font-size: 13px;
  caret-color: var(--accent);
  font-weight: bold;
}

body:not(.era-1):not(.era-2) #user-input {
  color: var(--accent);
}

.era-1 #user-input, 
.era-2 #user-input {
  color: #00ff88;
  text-shadow: 0 0 5px rgba(0, 255, 136, 0.5);
}

/* BINARY GATE */

.binary-gate {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}

.gate-btn {
  padding: 28px 18px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 15px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
  letter-spacing: 1px;
  line-height: 1.4;
}
.gate-btn:hover  { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); transform: translateY(-2px); }
.gate-btn.correct{ border-color: var(--green);  background: var(--green-dim);  color: var(--green); }
.gate-btn.wrong  { border-color: var(--red);    background: var(--red-dim);    color: var(--red); animation: shake 0.35s ease; }


/* MULTI CHOICE */

.choice-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 8px;
}

.choice-btn {
  padding: 14px 16px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.2s;
  text-align: left;
  line-height: 1.4;
}
.choice-btn:hover  { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.choice-btn.correct{ border-color: var(--green);  background: var(--green-dim);  color: var(--green); }
.choice-btn.wrong  { border-color: var(--red);    background: var(--red-dim);    color: var(--red); animation: shake 0.35s ease; }


/* FILL IN THE BLANK */

.fill-wrap {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-md);
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 3;
  color: var(--text);
  margin-top: 8px;
}

.fill-blank {
  display: inline-block;
  background: var(--surface3);
  border: none;
  border-bottom: 2px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 15px;
  padding: 2px 6px;
  outline: none;
  min-width: 100px;
  border-radius: 0;
  transition: border-color 0.2s;
}
.fill-blank:focus  { border-bottom-color: var(--gold); }
.fill-blank.correct{ border-bottom-color: var(--green); color: var(--green); background: var(--green-dim); }
.fill-blank.wrong  { border-bottom-color: var(--red);   color: var(--red);   background: var(--red-dim); animation: shake 0.35s; }

.fill-submit {
  display: block;
  margin-top: 12px;
  padding: 9px 24px;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.2s;
}
.fill-submit:hover { border-color: var(--accent); color: var(--accent); }


/* SORT / DRAG-DROP */

.sort-zone { margin-top: 8px; }

.sort-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.sort-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 50px;
  padding: 10px;
  background: var(--surface);
  border: 1px dashed var(--border2);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
}

.sort-target {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 50px;
  padding: 10px;
  background: var(--surface2);
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  align-items: center;
  transition: border-color 0.2s;
}
.sort-target.over { border-color: var(--accent); background: var(--accent-dim); }

.sort-chip {
  padding: 7px 14px;
  background: var(--surface3);
  border: 1px solid var(--border2);
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text);
  cursor: grab;
  user-select: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.sort-chip:hover       { border-color: var(--accent); color: var(--accent); }
.sort-chip.drag        { opacity: 0.4; border-color: var(--accent); }
.sort-chip.correct-chip{ border-color: var(--green); color: var(--green); background: var(--green-dim); }
.sort-chip.wrong-chip  { border-color: var(--red);   color: var(--red);   background: var(--red-dim); }

.sort-slot {
  min-width: 90px;
  min-height: 36px;
  border: 1px dashed var(--border2);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  flex: 0 0 auto;
}

.sort-verify {
  margin-top: 12px;
  padding: 9px 22px;
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.2s;
}
.sort-verify:hover { background: var(--accent); color: var(--surface); }


/* PAIR MATCH */

.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 8px;
}

.match-col-lbl {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.match-chip {
  padding: 10px 14px;
  margin: 4px 0;
  border: 1px solid var(--border2);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--surface2);
  line-height: 1.4;
}
.match-chip:hover  { border-color: var(--accent); color: var(--accent); }
.match-chip.sel    { border-color: var(--teal); color: var(--teal); background: var(--teal-dim); }
.match-chip.matched{ border-color: var(--green); color: var(--green); background: var(--green-dim); cursor: default; }
.match-chip.wrong  { border-color: var(--red); animation: shake 0.35s; }


/* CONFLICT HUNT */

.conflict-file {
  background: #1a1208;
  border: 1px solid var(--border2);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 13px;
  overflow: hidden;
  margin-top: 8px;
}

.era-1 .conflict-file,
.era-2 .conflict-file { background: #000; }

.cf-line {
  display: flex;
  gap: 12px;
  padding: 4px 16px;
  cursor: pointer;
  transition: background 0.15s;
  line-height: 1.7;
  color: #c8b070;
}
.era-1 .cf-line,
.era-2 .cf-line { color: #aaa; }

.cf-line:hover    { background: rgba(0,0,0,0.08); }
.cf-line.sel      { background: rgba(181,114,42,0.14); }
.cf-line.hit-good { background: rgba(74,120,64,0.2); color: var(--green); }
.cf-line.hit-bad  { background: rgba(160,48,32,0.2); color: var(--red); }

.cf-num { color: var(--text-faint); min-width: 22px; text-align: right; user-select: none; }

.conflict-check {
  margin: 8px 10px;
  padding: 7px 18px;
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.2s;
}
.conflict-check:hover { background: var(--accent); color: var(--surface); }


/* CONTROLS BAR */

#controls-bar {
  display: flex;
  gap: 10px;
  padding: 10px 24px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  align-items: center;
  transition: background 1s ease;
}

.ctrl-btn {
  padding: 7px 14px;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}
.ctrl-btn:hover       { border-color: var(--gold); color: var(--gold); }
.ctrl-btn.ctrl-skip:hover { border-color: var(--red); color: var(--red); }

.ctrl-cost {
  font-size: 9px;
  color: var(--red);
  border: 1px solid var(--red-dim);
  border-radius: 20px;
  padding: 0 5px;
}

.xp-preview {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 4px;
}
.xp-icon { color: var(--gold); }


/* RIGHT PANEL */

#right-panel {
  width: 200px;
  background: var(--surface);
  border-left: 1px solid var(--border);
  flex-shrink: 0;
  overflow-y: auto;
  padding: 12px;
  transition: background 1s ease;
}

#field-notes {
  font-family: var(--font-body);
  font-size: 12px;
  font-style: italic;
  color: var(--text-dim);
  line-height: 1.7;
}

.note-entry {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.note-cmd {
  font-family: var(--font-mono);
  font-size: 12px;
  font-style: normal;
  color: var(--accent);
  margin-bottom: 3px;
}

.note-desc {
  font-size: 11px;
  color: var(--text-dim);
  font-style: italic;
}


/* OVERLAYS */

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.72);
  z-index: 500;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.overlay.open { display: flex; }

/* era-0 overlay backdrop is warmer */
body:not(.era-1):not(.era-2) .overlay {
  background: rgba(26,16,0,0.75);
}

.overlay-inner {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}

.overlay-title {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 4px;
  color: var(--text-dim);
  margin-bottom: 20px;
  text-align: center;
}

.feedback-inner { text-align: center; }

.feedback-status {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 3px;
  margin-bottom: 10px;
}
.feedback-status.ok  { color: var(--green); }
.feedback-status.err { color: var(--red); }

.feedback-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-bright);
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.feedback-explanation {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--text);
  line-height: 1.8;
  text-align: left;
  background: var(--surface2);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  margin-bottom: 14px;
  font-style: italic;
}

.feedback-example {
  background: #1a1208;
  border: 1px solid var(--border2);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--green);
  text-align: left;
  white-space: pre;
  line-height: 1.8;
  margin-bottom: 16px;
  overflow-x: auto;
}

.era-1 .feedback-example,
.era-2 .feedback-example { background: #000; }

.feedback-reward {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--gold);
  margin-bottom: 20px;
  letter-spacing: 3px;
}

#map-chapters {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.map-item {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 11px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.map-item.done  { border-color: var(--green-dim); color: var(--text-dim); }
.map-item.active{ border-color: var(--accent); color: var(--accent); }
.map-item.locked{ color: var(--text-faint); }
.map-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border2); flex-shrink: 0; }
.map-item.done  .map-dot { background: var(--green); }
.map-item.active.map-dot { background: var(--accent); }


/* WIN SCREEN */

#win-screen {
  align-items: center;
  justify-content: center;
  position: fixed;
  inset: 0;
  z-index: 900;
  background: var(--bg);
}

.win-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 50%, rgba(200,150,12,0.14) 0%, transparent 70%);
  pointer-events: none;
}

.win-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px;
}

.win-emblem {
  font-size: 40px;
  color: var(--gold);
  margin-bottom: 16px;
  animation: emblemPulse 2s ease-in-out infinite;
}

.win-title {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 900;
  color: var(--text-bright);
  letter-spacing: 4px;
  margin-bottom: 12px;
}

.win-sub {
  font-family: var(--font-body);
  font-size: 17px;
  font-style: italic;
  color: var(--text-dim);
  max-width: 500px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.win-stats {
  display: flex;
  gap: 40px;
  justify-content: center;
  margin-bottom: 36px;
}

.win-stat { text-align: center; }

.win-num {
  font-family: var(--font-display);
  font-size: 36px;
  color: var(--gold);
  margin-bottom: 4px;
}

.win-lbl {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
}


/* HINT INLINE */

.hint-inline {
  margin-top: 12px;
  padding: 10px 14px;
  background: var(--gold-dim);
  border: 1px solid var(--border2);
  border-left: 3px solid var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.toast {
  position: fixed;
  bottom: 80px;
  right: 20px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  z-index: 9000;
  animation: fadeIn 0.3s ease;
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%     { transform: translateX(-6px); }
  75%     { transform: translateX(6px); }
}


/* RESPONSIVE */

@media (max-width: 900px) {
  #sidebar, #right-panel { display: none; }
  .binary-gate, .choice-grid, .match-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .prologue-title { font-size: 28px; }
  #header .header-center { display: none; }
  #map-chapters { grid-template-columns: 1fr; }
}