/* ═══════════════════════════════════════════
   TECH TREE — 16-bit Aesthetic
   ═══════════════════════════════════════════ */

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

:root {
  --font-pixel: 'Press Start 2P', monospace;
  --font-body: 'Consolas', 'Monaco', 'Courier New', monospace;
}

body {
  background: #0d1117;
  color: #c9d1d9;
  font-family: var(--font-body);
  overflow: auto;
  min-height: 100vh;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent 0px, transparent 2px,
    rgba(0,0,0,0.04) 2px, rgba(0,0,0,0.04) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

.hidden { display: none !important; }

/* ── HEADER ── */
.hdr {
  position: sticky;
  top: 0;
  z-index: 200;
  background: #161b22;
  border-bottom: 4px solid #f0c040;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: nowrap;
  overflow-x: auto;
}

.hdr-title {
  font-family: var(--font-pixel);
  font-size: 14px;
  color: #f0c040;
  text-shadow: 2px 2px 0 #5a3a00;
  letter-spacing: 1px;
  white-space: nowrap;
}

.hdr-stats {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: nowrap;
  flex-shrink: 0;
}

.stat-row {
  display: flex;
  align-items: center;
  gap: 5px;
  white-space: nowrap;
}

.stat-label {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: #8b949e;
  letter-spacing: 1px;
}

.xp-bar {
  width: 100px;
  height: 12px;
  background: #21262d;
  border: 2px solid #484f58;
  position: relative;
  overflow: hidden;
}

.xp-fill {
  height: 100%;
  background: linear-gradient(180deg, #56d364 0%, #2ea043 50%, #1a7f37 100%);
  transition: width 0.3s steps(8);
}

.xp-text {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #56d364;
}

.era-badge {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #f0c040;
  background: #3d2e00;
  padding: 4px 10px;
  border: 2px solid #f0c040;
}

.score-val {
  font-family: var(--font-pixel);
  font-size: 12px;
  color: #f0c040;
}

.streak-val {
  font-family: var(--font-pixel);
  font-size: 12px;
  color: #ff6b35;
}

.streak-val--golden {
  color: #ffd700;
  text-shadow: 0 0 8px rgba(255, 215, 0, 0.6);
  animation: golden-glow 1s ease-in-out infinite alternate;
}

@keyframes golden-glow {
  from { text-shadow: 0 0 4px rgba(255, 215, 0, 0.4); }
  to { text-shadow: 0 0 12px rgba(255, 215, 0, 0.8); }
}

.hdr-actions {
  display: flex;
  gap: 5px;
  flex-shrink: 0;
  margin-left: auto;
  white-space: nowrap;
}

.btn-pixel {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #c9d1d9;
  background: #21262d;
  border: 2px solid #484f58;
  padding: 8px 14px;
  cursor: pointer;
  letter-spacing: 0.5px;
}

.btn-pixel:hover {
  background: #30363d;
  border-color: #f0c040;
  color: #f0c040;
}

.btn-pixel:active {
  transform: translate(1px, 1px);
}

.btn-sm {
  font-size: 7px;
  padding: 5px 8px;
  opacity: 0.7;
}

.btn-sm:hover {
  opacity: 1;
}




/* ── TREE CANVAS ── */
.scroll-wrap {
  overflow: auto;
  padding: 10px 20px 40px;
}

.canvas {
  position: relative;
}

.col-div {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(255,255,255,0.04);
}

/* ── ERA LABELS ── */
.era {
  position: absolute;
  top: 8px;
  width: 230px;
  height: 34px;
  font-family: var(--font-pixel);
  font-size: 11px;
  text-align: center;
  border-bottom: 2px solid;
  letter-spacing: 1px;
  z-index: 2;
}

.era span {
  display: block;
  font-family: var(--font-pixel);
  font-size: 8px;
  opacity: 0.55;
  margin-top: 5px;
}

.era-gate {
  position: absolute;
  top: 38px;
  left: 0;
  right: 0;
  font-size: 7px;
  color: #e74c3c;
  opacity: 0.9;
  text-align: center;
  white-space: nowrap;
}

.era-gate:empty {
  display: none;
}

.m-era-gate {
  display: block;
  font-family: var(--font-pixel);
  font-size: 8px;
  color: #e74c3c;
  margin-top: 4px;
}

/* ── SVG CONNECTIONS ── */
.svg-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* ── NODE CARDS ── */
.nd {
  position: absolute;
  width: 240px;
  height: 110px;
  border: 3px solid;
  z-index: 5;
  cursor: default;
  transition: transform 0.05s steps(2), box-shadow 0.05s steps(2), opacity 0.15s ease;
}

.nh {
  font-family: var(--font-pixel);
  font-size: 9px;
  padding: 5px 8px;
  letter-spacing: 0.5px;
  border-bottom: 2px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ni { font-size: 16px; line-height: 1; }

.nt {
  font-size: 16px;
  font-weight: bold;
  padding: 8px 8px 4px;
  color: #fff;
  line-height: 1.4;
}

.nf {
  font-size: 13px;
  padding: 2px 8px;
  color: #8b949e;
  line-height: 1.5;
}

.nd-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  background: #1a7f37;
  border: 2px solid #56d364;
  color: #56d364;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  line-height: 1;
}

/* ── TOOLTIP ── */
.tt {
  display: none;
  position: absolute;
  top: -2px;
  left: 248px;
  width: 300px;
  background: #161b22;
  border: 3px solid #484f58;
  padding: 12px 14px;
  z-index: 100;
  font-size: 13px;
  line-height: 1.7;
  color: #8b949e;
  pointer-events: none;
}

.tt-l {
  top: -2px;
  left: auto;
  right: 248px;
}

.nd:hover .tt { display: block; }

.tt-h {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #f0c040;
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 2px solid #21262d;
  line-height: 1.4;
}

.tt ul { padding-left: 18px; }
.tt li { margin-bottom: 4px; }

.tt-dep {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid #21262d;
  font-size: 12px;
  line-height: 1.6;
  color: #c9d1d9;
}

.tt-dep-label {
  font-family: var(--font-pixel);
  font-size: 7px;
  color: #f0c040;
  letter-spacing: 1px;
  margin-right: 6px;
}

.tt-unlocks .tt-dep-label {
  color: #56d364;
}

/* ═══════════════════════════════════════════
   NODE STATES
   ═══════════════════════════════════════════ */

.nd--locked {
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.nd--locked .tt { display: none !important; }

.nd--researchable {
  cursor: pointer;
  animation: pulse-node 1.2s steps(2) infinite;
}

.nd--researchable:hover {
  transform: scale(1.04);
  z-index: 50;
  filter: brightness(1.2);
}

@keyframes pulse-node {
  0%, 100% { box-shadow: 0 0 0 0 rgba(240,192,64,0.6); }
  50% { box-shadow: 0 0 10px 3px rgba(240,192,64,0.4); }
}

.nd--unlocked {
  box-shadow: inset 0 0 8px rgba(86,211,100,0.15);
}

.nd--unlocked:hover {
  transform: scale(1.03);
  z-index: 50;
  box-shadow: 0 0 10px currentColor, inset 0 0 8px rgba(86,211,100,0.15);
}

/* BROWSE MODE */
.nd--browse {
  box-shadow: none;
  cursor: default;
  animation: none;
}

.nd--browse:hover {
  transform: scale(1.03);
  z-index: 50;
  box-shadow: 0 0 8px currentColor;
}

.nd--active {
  border-color: #f0c040 !important;
  box-shadow: 0 0 12px rgba(240,192,64,0.5);
  z-index: 55;
}

/* ═══════════════════════════════════════════
   DEPENDENCY HIGHLIGHT ON HOVER
   ═══════════════════════════════════════════ */

.nd--dimmed {
  opacity: 0.3 !important;
  filter: grayscale(0.6) brightness(0.6);
}

.nd--dimmed .tt { display: none !important; }

.nd--highlight {
  opacity: 1 !important;
  filter: none;
  z-index: 60;
  box-shadow: 0 0 14px currentColor;
}

.conn--dimmed {
  opacity: 0.1 !important;
}

.conn--highlight {
  opacity: 1 !important;
  stroke-width: 2.5 !important;
  filter: drop-shadow(0 0 3px currentColor);
}

/* ═══════════════════════════════════════════ */

.nd--shake {
  animation: shake 0.4s steps(4);
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-3px); }
  40% { transform: translateX(3px); }
  60% { transform: translateX(-2px); }
  80% { transform: translateX(2px); }
}

/* ═══════════════════════════════════════════
   QUIZ PANEL
   ═══════════════════════════════════════════ */

.quiz {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0,0,0,0.75);
  padding: 0;
  display: flex;
  align-items: flex-end;
  animation: slide-up 0.15s steps(3);
}

@keyframes slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.quiz-inner {
  width: 860px;
  max-width: calc(100vw - 40px);
  max-height: 85vh;
  overflow-y: auto;
  margin: 0 auto;
  background: #0d1117;
  border: 4px solid #484f58;
  border-bottom: none;
  border-top: 4px solid #f0c040;
  padding: 16px 20px 20px;
  position: relative;
}

.quiz-inner::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #21262d;
  pointer-events: none;
}

.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 2px solid #21262d;
}

.quiz-title {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #f0c040;
  letter-spacing: 1px;
}

.quiz-close {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #8b949e;
  background: none;
  border: 2px solid #484f58;
  padding: 4px 10px;
  cursor: pointer;
}

.quiz-close:hover {
  color: #e74c3c;
  border-color: #e74c3c;
}

.quiz-scenario {
  font-size: 14px;
  color: #8b949e;
  line-height: 1.8;
  margin-bottom: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid #21262d;
}

.quiz-scenario:empty {
  display: none;
}

.quiz-body {
  font-size: 15px;
  color: #c9d1d9;
  line-height: 1.8;
  min-height: 24px;
  margin-bottom: 14px;
}

.quiz-body:empty {
  display: none;
}

.quiz-scenario.typing::after,
.quiz-body.typing::after {
  content: '█';
  animation: blink-cursor 0.6s steps(1) infinite;
  color: #f0c040;
}

@keyframes blink-cursor {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.quiz-choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.quiz-choice {
  font-family: var(--font-body);
  font-size: 14px;
  color: #c9d1d9;
  background: #161b22;
  border: 2px solid #30363d;
  padding: 10px 14px;
  cursor: pointer;
  text-align: left;
  line-height: 1.7;
  transition: background 0.05s steps(1), border-color 0.05s steps(1);
}

.quiz-choice:hover:not(:disabled),
.quiz-choice--selected:not(:disabled) {
  background: #21262d;
  border-color: #f0c040;
  color: #f0c040;
}

.quiz-choice:disabled {
  cursor: default;
  opacity: 0.7;
}

.choice-label {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #f0c040;
  margin-right: 8px;
}

.choice-correct {
  border-color: #56d364 !important;
  background: #0d2818 !important;
  color: #56d364 !important;
}

.choice-wrong {
  border-color: #e74c3c !important;
  background: #2d0a0a !important;
  color: #e74c3c !important;
}

.quiz-feedback {
  font-size: 14px;
  min-height: 24px;
  line-height: 1.8;
}

.fb-correct { color: #56d364; }
.fb-wrong { color: #e74c3c; }

.fb-grade-mastered { color: #56d364; }
.fb-grade-unlocked { color: #d29922; }
.fb-grade-hardway { color: #e74c3c; }

.quiz-continue {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #f0c040;
  background: transparent;
  border: 2px solid #484f58;
  padding: 8px 20px;
  cursor: pointer;
  letter-spacing: 1px;
  display: block;
  margin: 4px auto 0;
  opacity: 0.3;
}

.quiz-continue--ready {
  border-color: #f0c040;
  opacity: 1;
  animation: blink-continue 1s steps(1) infinite;
}

.quiz-continue:hover {
  background: #3d2e00;
}

@keyframes blink-continue {
  0%, 70% { opacity: 1; }
  71%, 100% { opacity: 0.3; }
}

/* ═══════════════════════════════════════════
   ERA INTRO OVERLAY
   ═══════════════════════════════════════════ */

.era-intro {
  position: fixed;
  inset: 0;
  z-index: 600;
  background: rgba(0,0,0,0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.4s steps(4);
}

.era-intro-box {
  background: #0d1117;
  border: 4px solid #f0c040;
  width: 640px;
  max-width: 94vw;
  padding: 32px 36px;
  text-align: center;
  position: relative;
}

.era-intro-box::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #3d2e00;
  pointer-events: none;
}

.era-intro-title {
  font-family: var(--font-pixel);
  font-size: 16px;
  color: #f0c040;
  text-shadow: 2px 2px 0 #5a3a00;
  margin-bottom: 18px;
  letter-spacing: 2px;
}

.era-intro-text {
  font-size: 15px;
  color: #c9d1d9;
  line-height: 1.9;
  margin-bottom: 24px;
  min-height: 120px;
  text-align: left;
}

.era-intro-text::after {
  content: '█';
  animation: blink-cursor 0.6s steps(1) infinite;
  color: #f0c040;
}

/* ═══════════════════════════════════════════
   WIN OVERLAY
   ═══════════════════════════════════════════ */

.win-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0,0,0,0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.5s steps(4);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.win-box {
  background: #0d1117;
  border: 4px solid #f0c040;
  padding: 32px 40px;
  text-align: center;
  max-width: 560px;
  position: relative;
}

.win-box::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #3d2e00;
  pointer-events: none;
}

.win-title {
  font-family: var(--font-pixel);
  font-size: 18px;
  color: #f0c040;
  text-shadow: 2px 2px 0 #5a3a00;
  margin-bottom: 16px;
  animation: sparkle 1.5s steps(3) infinite;
}

@keyframes sparkle {
  0%, 100% { text-shadow: 2px 2px 0 #5a3a00; }
  33% { text-shadow: 2px 2px 0 #5a3a00, 0 0 10px #f0c040; }
  66% { text-shadow: 2px 2px 0 #5a3a00, 0 0 20px #f0c040; }
}

.win-sub {
  font-size: 15px;
  color: #c9d1d9;
  margin-bottom: 24px;
  line-height: 1.8;
}

.win-stats {
  margin-bottom: 24px;
}

.win-stat {
  font-size: 14px;
  color: #8b949e;
  line-height: 2;
}

.btn-win {
  font-size: 11px;
  padding: 10px 24px;
  border-color: #f0c040;
  color: #f0c040;
}

.btn-win:hover {
  background: #3d2e00;
}

/* ═══════════════════════════════════════════
   RESOURCE BAR
   ═══════════════════════════════════════════ */

.resource-bar {
  background: #0d1117;
  padding: 6px 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  border-bottom: 2px solid #21262d;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  position: relative;
  z-index: 198;
}

.res-item {
  cursor: help;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 4px;
}

.res-item:hover {
  opacity: 0.7;
}

.res-dot {
  width: 10px;
  height: 10px;
  border: 1px solid rgba(255,255,255,0.15);
  flex-shrink: 0;
}

.res-val {
  font-variant-numeric: tabular-nums;
}




/* ═══════════════════════════════════════════
   TUTORIAL OVERLAY
   ═══════════════════════════════════════════ */

.tutorial-overlay {
  position: fixed;
  inset: 0;
  z-index: 650;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.3s steps(4);
}

.tutorial-box {
  background: #0d1117;
  border: 4px solid #f0c040;
  max-width: 520px;
  padding: 28px 32px;
  text-align: center;
  position: relative;
}

.tutorial-box::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #3d2e00;
  pointer-events: none;
}

.tutorial-title {
  font-family: var(--font-pixel);
  font-size: 14px;
  color: #f0c040;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.tutorial-grid {
  text-align: left;
  margin-bottom: 16px;
}

.tut-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid #161b22;
}

.tut-icon { font-size: 18px; width: 24px; text-align: center; }
.tut-name { font-family: var(--font-pixel); font-size: 9px; color: #f0c040; width: 80px; }
.tut-desc { font-size: 14px; color: #c9d1d9; }

.tutorial-note {
  font-size: 13px;
  color: #8b949e;
  margin-bottom: 20px;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════
   SCOUTED NODES (Comms)
   ═══════════════════════════════════════════ */

.nd--scouted {
  opacity: 0.35;
  pointer-events: none;
  border-style: dashed;
}

.nd--scouted .nf,
.nd--scouted .tt { display: none !important; }

.nd--scouted .nt::after {
  content: " ???";
  color: #484f58;
}

/* ═══════════════════════════════════════════
   DEFENSE BLOCK FEEDBACK
   ═══════════════════════════════════════════ */

.fb-blocked { color: #3498db; }

/* help sections */
.help-section {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #f0c040;
  margin: 12px 0 6px;
  letter-spacing: 1px;
  text-align: left;
}

.help-section:first-child { margin-top: 0; }

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */

.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: #0d1117;
  border-top: 1px solid #21262d;
  padding: 6px 16px;
  font-size: 11px;
  color: #484f58;
  text-align: center;
}

.site-footer a {
  color: #6e7681;
  text-decoration: none;
}

.site-footer a:hover {
  color: #f0c040;
  text-decoration: underline;
}

/* ═══════════════════════════════════════════
   HELP OVERLAY
   ═══════════════════════════════════════════ */

.help-overlay {
  position: fixed;
  inset: 0;
  z-index: 800;
  background: rgba(0,0,0,0.88);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.3s steps(4);
}

.help-box {
  background: #0d1117;
  border: 4px solid #484f58;
  padding: 28px 32px;
  text-align: center;
  max-width: 480px;
  position: relative;
}

.help-box::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #21262d;
  pointer-events: none;
}

.help-title {
  font-family: var(--font-pixel);
  font-size: 14px;
  color: #f0c040;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.help-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 16px;
  text-align: left;
  margin-bottom: 24px;
}

.help-key {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #f0c040;
  background: #21262d;
  padding: 4px 8px;
  border: 1px solid #484f58;
  white-space: nowrap;
}

.help-desc {
  font-size: 14px;
  color: #c9d1d9;
  display: flex;
  align-items: center;
}

/* ═══════════════════════════════════════════
   MOBILE CARD LIST
   ═══════════════════════════════════════════ */

.mobile-tree {
  padding: 12px 16px 80px;
}

.m-era {
  margin-bottom: 20px;
}

.m-era-hdr {
  font-family: var(--font-pixel);
  font-size: 12px;
  padding: 8px 0 6px;
  border-bottom: 2px solid;
  margin-bottom: 10px;
  letter-spacing: 1px;
}

.m-era-hdr span {
  font-size: 9px;
  opacity: 0.5;
  margin-left: 8px;
}

.m-card {
  background: #161b22;
  border: 2px solid #30363d;
  border-left: 5px solid;
  padding: 12px 14px;
  margin-bottom: 8px;
  position: relative;
  min-height: 64px;
}

.m-card-hdr {
  font-family: var(--font-pixel);
  font-size: 9px;
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.m-card-cat {
  opacity: 0.7;
}

.m-card-title {
  font-size: 17px;
  font-weight: bold;
  color: #fff;
  margin-bottom: 4px;
  line-height: 1.4;
}

.m-card-flavor {
  font-size: 14px;
  color: #8b949e;
  line-height: 1.5;
}

.m-card-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  font-family: var(--font-pixel);
  font-size: 8px;
  color: #f0c040;
}

.m-card-dep {
  margin-top: 6px;
  font-size: 12px;
  color: #8b949e;
  line-height: 1.5;
}

.m-card-dep-label {
  font-family: var(--font-pixel);
  font-size: 7px;
  color: #f0c040;
  letter-spacing: 1px;
  margin-right: 4px;
}

.m-card-unlocks .m-card-dep-label {
  color: #56d364;
}

/* Mobile card states */
.m-card--locked {
  display: none;
}

.m-card--researchable {
  border-top-color: #f0c040;
  border-right-color: #f0c040;
  border-bottom-color: #f0c040;
  cursor: pointer;
  animation: pulse-mobile 1.5s ease infinite;
}

@keyframes pulse-mobile {
  0%, 100% { box-shadow: 0 0 0 0 rgba(240,192,64,0); }
  50% { box-shadow: 0 0 8px 2px rgba(240,192,64,0.3); }
}

.m-card--unlocked {
  opacity: 0.7;
}

.m-card--browse {
  opacity: 1;
  display: block;
}

/* ═══════════════════════════════════════════
   MOBILE OVERRIDES (< 768px)
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {
  body { overflow: auto; }

  .hdr {
    padding: 8px 12px;
    gap: 6px;
    flex-wrap: wrap;
  }

  .hdr-left { width: 100%; }
  .hdr-title { font-size: 14px; }
  .hdr-sub { display: none; }

  .hdr-stats {
    gap: 8px;
    width: 100%;
    justify-content: space-between;
  }
  .stat-label { font-size: 7px; }
  .xp-bar { width: 60px; height: 10px; }
  .xp-text { font-size: 8px; }
  .era-badge { font-size: 7px; padding: 2px 5px; }
  .score-val { font-size: 9px; }
  .pop-val { font-size: 10px; }
  .pop-icon { font-size: 12px; }
  .btn-pixel { font-size: 7px; padding: 4px 7px; }
  .btn-sm { font-size: 6px; padding: 3px 5px; }

  .hdr-actions {
    width: 100%;
    justify-content: flex-end;
  }

  .resource-bar {
    padding: 3px 8px;
    gap: 8px;
    font-size: 11px;
    flex-wrap: wrap;
  }
  .res-item { min-width: 44px; }
  .scroll-wrap { display: none !important; }
  .mobile-tree { display: block !important; }

  /* Full-screen quiz */
  .quiz {
    inset: 0;
    background: rgba(0,0,0,0.97);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .quiz-inner {
    max-width: 100%;
    width: 100%;
    border: none;
    border-top: 4px solid #f0c040;
    padding: 16px 18px 24px;
    max-height: 90vh;
    overflow-y: auto;
  }

  .quiz-inner::before { display: none; }

  .quiz-title { font-size: 9px; }
  .quiz-scenario { font-size: 13px; }
  .quiz-body { font-size: 15px; line-height: 1.9; }
  .quiz-close { font-size: 12px; padding: 6px 12px; }

  .quiz-choice {
    font-size: 14px;
    padding: 14px 14px;
    min-height: 52px;
    line-height: 1.8;
  }

  .quiz-continue {
    font-size: 11px;
    padding: 12px 28px;
    margin-top: 10px;
  }

  .quiz-feedback { font-size: 14px; }

  .era-intro-box {
    max-width: 94vw;
    padding: 24px 20px;
  }
  .era-intro-title { font-size: 14px; }
  .era-intro-text { font-size: 15px; line-height: 1.9; }

  .win-box, .gameover-box {
    max-width: 94vw;
    padding: 24px 20px;
  }
  .win-title, .gameover-title { font-size: 14px; }
  .win-sub, .gameover-sub { font-size: 14px; }
  .win-stat, .gameover-stat { font-size: 13px; }
}

/* ═══════════════════════════════════════════
   POPULATION
   ═══════════════════════════════════════════ */

.stat-pop {
  gap: 4px;
  position: relative;
}

.pop-icon {
  font-size: 14px;
  line-height: 1;
}

.pop-val {
  font-family: var(--font-pixel);
  font-size: 14px;
  color: #c9d1d9;
  transition: color 0.1s;
}

.pop-loss {
  color: #e74c3c !important;
  animation: pop-pulse-red 0.6s steps(3);
}

.pop-gain {
  color: #56d364 !important;
  animation: pop-pulse-green 0.6s steps(3);
}

@keyframes pop-pulse-red {
  0% { transform: scale(1); }
  30% { transform: scale(1.3); color: #ff4444; }
  100% { transform: scale(1); }
}

@keyframes pop-pulse-green {
  0% { transform: scale(1); }
  30% { transform: scale(1.2); color: #44ff44; }
  100% { transform: scale(1); }
}

.pop-regen-float {
  position: absolute;
  top: -2px;
  right: -18px;
  font-family: var(--font-pixel);
  font-size: 8px;
  color: #56d364;
  pointer-events: none;
  animation: regen-float 1.2s ease-out forwards;
}

@keyframes regen-float {
  0% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(-18px); }
}

/* ═══════════════════════════════════════════
   POPULATION TIER COLORS (on pop-val)
   ═══════════════════════════════════════════ */

.pop-val--thriving { color: #56d364; }
.pop-val--stable { color: #c9d1d9; }
.pop-val--struggling { color: #d29922; }
.pop-val--crisis { color: #e74c3c; }
.pop-val--last-stand { color: #ff4444; animation: tier-flash 0.8s steps(1) infinite; }
.pop-val--fallen { color: #ff0000; }

@keyframes tier-flash {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0.3; }
}

/* ═══════════════════════════════════════════
   GAME OVER OVERLAY
   ═══════════════════════════════════════════ */

.gameover-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(20,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.5s steps(4);
}

.gameover-box {
  background: #1a0808;
  border: 4px solid #e74c3c;
  padding: 32px 40px;
  text-align: center;
  max-width: 560px;
  position: relative;
}

.gameover-box::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #3d0d0d;
  pointer-events: none;
}

.gameover-title {
  font-family: var(--font-pixel);
  font-size: 16px;
  color: #e74c3c;
  text-shadow: 2px 2px 0 #5a0000;
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.gameover-sub {
  font-size: 14px;
  color: #c9d1d9;
  margin-bottom: 24px;
  line-height: 1.8;
}

.gameover-stats {
  margin-bottom: 24px;
}

.gameover-stat {
  font-size: 13px;
  color: #8b949e;
  line-height: 2;
}

.btn-retry {
  font-size: 11px;
  padding: 10px 24px;
  border-color: #e74c3c;
  color: #e74c3c;
}

.btn-retry:hover {
  background: #3d0d0d;
}

/* ═══════════════════════════════════════════
   JOURNAL OVERLAY
   ═══════════════════════════════════════════ */

.journal-overlay {
  position: fixed;
  inset: 0;
  z-index: 700;
  background: rgba(0,0,0,0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fade-in 0.3s steps(4);
}

.journal-box {
  background: #0d1117;
  border: 4px solid #f0c040;
  padding: 24px 28px;
  width: 90vw;
  max-width: 640px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

.journal-box::before {
  content: '';
  position: absolute;
  inset: 4px;
  border: 2px solid #3d2e00;
  pointer-events: none;
}

.journal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #21262d;
}

.journal-title {
  font-family: var(--font-pixel);
  font-size: 14px;
  color: #f0c040;
  letter-spacing: 1px;
}

.journal-content {
  overflow-y: auto;
  flex: 1;
  padding-right: 8px;
}

.journal-empty {
  font-size: 14px;
  color: #8b949e;
  text-align: center;
  padding: 40px 0;
}

.j-era {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #f0c040;
  margin: 16px 0 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid #21262d;
}

.j-entry {
  background: #161b22;
  border: 1px solid #21262d;
  padding: 10px 12px;
  margin-bottom: 8px;
}

.j-entry-hdr {
  font-size: 15px;
  font-weight: bold;
  color: #fff;
  margin-bottom: 2px;
}

.j-entry-flavor {
  font-size: 13px;
  color: #8b949e;
  margin-bottom: 6px;
}

.j-entry-details {
  font-size: 12px;
  color: #6e7681;
  padding-left: 16px;
  line-height: 1.7;
}

.j-entry-scenario {
  font-size: 13px;
  color: #8b949e;
  line-height: 1.6;
  margin-bottom: 10px;
  font-style: italic;
}

.j-decision {
  border-left: 3px solid #21262d;
  padding: 8px 12px;
  margin-bottom: 8px;
}

.j-decision.j-correct {
  border-left-color: #238636;
}

.j-decision.j-wrong {
  border-left-color: #da3633;
}

.j-decision-prompt {
  font-size: 12px;
  color: #6e7681;
  margin-bottom: 4px;
}

.j-decision-choice {
  font-size: 13px;
  font-weight: bold;
  margin-bottom: 4px;
}

.j-correct .j-decision-choice {
  color: #3fb950;
}

.j-wrong .j-decision-choice {
  color: #f85149;
}

.j-decision-icon {
  font-weight: bold;
}

.j-decision-narrative {
  font-size: 13px;
  color: #c9d1d9;
  line-height: 1.5;
}

.j-achievement {
  background: rgba(255, 215, 0, 0.05);
  border: 1px solid #3d2e00;
  padding: 8px 12px;
  margin-bottom: 6px;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.j-ach-label {
  font-family: var(--font-pixel);
  font-size: 9px;
  color: #ffd700;
  white-space: nowrap;
}

.j-ach-desc {
  font-size: 13px;
  color: #8b949e;
}

/* ═══════════════════════════════════════════
   WIN TIMELINE
   ═══════════════════════════════════════════ */

.win-timeline {
  max-height: 200px;
  overflow-y: auto;
  margin-bottom: 16px;
  text-align: left;
  border: 1px solid #21262d;
  padding: 8px 12px;
}

.tl-era {
  font-family: var(--font-pixel);
  font-size: 8px;
  color: #f0c040;
  margin: 8px 0 4px;
  letter-spacing: 1px;
}

.tl-era:first-child { margin-top: 0; }

.tl-entry {
  font-size: 13px;
  color: #c9d1d9;
  padding: 2px 0 2px 12px;
  border-left: 2px solid #21262d;
  line-height: 1.6;
}

/* ═══════════════════════════════════════════
   BOOK LINK
   ═══════════════════════════════════════════ */

/* ═══════════════════════════════════════════
   OVERLAY ACTIONS
   ═══════════════════════════════════════════ */

.overlay-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

/* ═══════════════════════════════════════════
   TIMER
   ═══════════════════════════════════════════ */




/* ═══════════════════════════════════════════
   APPEAR ANIMATION
   ═══════════════════════════════════════════ */

.nd--appear {
  animation: node-appear 0.5s ease-out;
}

@keyframes node-appear {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}

.m-card--appear {
  animation: card-appear 0.4s ease-out;
}

@keyframes card-appear {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ═══════════════════════════════════════════
   EASTER EGGS
   ═══════════════════════════════════════════ */

.crt-flicker {
  animation: crt 1.5s steps(4) forwards;
}

@keyframes crt {
  0%   { filter: none; }
  10%  { filter: brightness(1.8) contrast(2) saturate(0); }
  15%  { filter: brightness(0.4); }
  25%  { filter: brightness(1.3) hue-rotate(90deg); }
  30%  { filter: none; }
  50%  { filter: brightness(1.6) contrast(1.5) saturate(0); }
  55%  { filter: brightness(0.6) hue-rotate(180deg); }
  65%  { filter: none; }
  80%  { filter: brightness(1.2) contrast(1.2); }
  100% { filter: none; }
}

.ee-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: #1a1a2e;
  color: #0f0;
  font-family: var(--font-pixel);
  font-size: 10px;
  padding: 10px 20px;
  border: 1px solid #0f0;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
  white-space: nowrap;
}

.ee-toast--visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.ee-badge {
  font-family: var(--font-pixel);
  font-size: 10px;
  color: #ffd700;
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid #ffd700;
  padding: 4px 12px;
  margin-top: 8px;
  text-align: center;
  animation: badge-glow 2s ease-in-out infinite alternate;
}

@keyframes badge-glow {
  from { box-shadow: 0 0 4px rgba(255, 215, 0, 0.3); }
  to   { box-shadow: 0 0 12px rgba(255, 215, 0, 0.6); }
}