/* ══════════════════════════════════════════════════
   MICROMETRO - MAIN STYLESHEET
   Theme tokens and component styles
══════════════════════════════════════════════════ */

:root {
  --bg:           #0d1117;
  --bg2:          #131920;
  --panel:        rgba(11,15,22,0.94);
  --panel2:       rgba(15,20,28,0.92);
  --overlay:      rgba(6,10,16,0.97);
  --border:       rgba(255,255,255,0.1);
  --border2:      rgba(255,255,255,0.28);
  --txt4:         rgba(255,255,255,0.40);
  --txt6:         rgba(255,255,255,0.60);
  --txt8:         rgba(255,255,255,0.85);
  --txt:          #ffffff;
  --accent:       #f5e642;
  --accent2:      #ffe97a;
  --flash-bg:     rgba(15,20,28,0.97);
  --dot:          rgba(255,255,255,0.028);
  --stn-fill:     #ffffff;
  --stn-stroke:   #0d1117;
  --del-col:      #f5e642;
  --hint-bg:      rgba(0,0,0,0.45);
  --hint-txt:     rgba(255,255,255,0.82);
}

body.light {
  --bg:           #f0ece2;
  --bg2:          #e6e2d8;
  --panel:        rgba(228,224,214,0.97);
  --panel2:       rgba(220,216,206,0.95);
  --overlay:      rgba(240,236,226,0.98);
  --border:       rgba(0,0,0,0.11);
  --border2:      rgba(0,0,0,0.35);
  --txt4:         rgba(0,0,0,0.42);
  --txt6:         rgba(0,0,0,0.62);
  --txt8:         rgba(0,0,0,0.82);
  --txt:          #0d1117;
  --accent:       #9a6b00;
  --accent2:      #b07e00;
  --flash-bg:     rgba(220,216,206,0.98);
  --dot:          rgba(0,0,0,0.05);
  --stn-fill:     #0d1117;
  --stn-stroke:   #f0ece2;
  --del-col:      #8a5e00;
  --hint-bg:      rgba(255,255,255,0.72);
  --hint-txt:     rgba(0,0,0,0.78);
}

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

body {
  background: var(--bg);
  overflow: hidden;
  font-family: 'Courier New', Consolas, monospace;
  transition: background 0.3s;
}

canvas {
  display: block;
  cursor: crosshair;
}

/* ══════════════════════════════════════════════════
   HUD (top centre pill)
══════════════════════════════════════════════════ */
#hud {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0;
  align-items: stretch;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 40px;
  backdrop-filter: blur(18px);
  user-select: none;
  z-index: 20;
  transition: opacity 0.3s, background 0.3s;
  overflow: hidden;
}

#hud.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Each HUD cell */
.hcell {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 18px;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--txt6);
  border-right: 1px solid var(--border);
  transition: background 0.2s;
}

.hcell:last-child {
  border-right: none;
}

.hcell.btn {
  cursor: pointer;
  gap: 6px;
}

.hcell.btn:hover {
  background: rgba(255, 255, 255, 0.07);
}

body.light .hcell.btn:hover {
  background: rgba(0, 0, 0, 0.06);
}

.hv {
  color: var(--accent);
  font-size: 20px;
  font-weight: bold;
  letter-spacing: 0;
  min-width: 32px;
  text-align: right;
}

.hlabel {
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--txt4);
}

.hdiff {
  font-size: 9px;
  letter-spacing: 2px;
  padding: 3px 10px;
  border-radius: 16px;
  border: 1px solid;
}

.hdiff.easy {
  color: #2ecc71;
  border-color: rgba(46, 204, 113, 0.45);
}

.hdiff.normal {
  color: #e6a817;
  border-color: rgba(230, 168, 23, 0.45);
}

.hdiff.hard {
  color: #e74c3c;
  border-color: rgba(231, 76, 60, 0.45);
}

/* ══════════════════════════════════════════════════
   BOTTOM PANEL
══════════════════════════════════════════════════ */
#panel {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(20px);
  z-index: 20;
  transition: opacity 0.3s, background 0.3s;
  flex-wrap: nowrap;
  overflow-x: auto;
}

#panel.hidden {
  opacity: 0;
  pointer-events: none;
}

.swatch {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.2);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  flex-shrink: 0;
  position: relative;
}

body.light .swatch {
  border-color: rgba(0, 0, 0, 0.22);
}

.swatch:hover {
  transform: scale(1.18);
}

.swatch.active {
  border: 3px solid #fff !important;
  box-shadow: 0 0 20px var(--sc, #fff);
  transform: scale(1.22);
}

body.light .swatch.active {
  border-color: #111 !important;
}

.sb-stops {
  position: absolute;
  top: -7px;
  right: -7px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 8px;
  color: var(--txt6);
  padding: 1px 4px;
  pointer-events: none;
}

.sb-trains {
  position: absolute;
  bottom: -7px;
  right: -7px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 8px;
  padding: 1px 4px;
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 2px;
}

.swatch-empty {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 2px dashed var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--txt4);
  font-size: 16px;
  pointer-events: none;
}

/* Shop / panel buttons */
.shop-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 5px 14px;
  border-radius: 7px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--txt6);
  font-family: 'Courier New', monospace;
  font-size: 9px;
  letter-spacing: 2px;
  line-height: 1.8;
  transition: all 0.18s;
  white-space: nowrap;
  min-width: 82px;
}

body.light .shop-btn {
  background: rgba(0, 0, 0, 0.03);
}

.shop-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border2);
  color: var(--txt);
}

body.light .shop-btn:hover:not(:disabled) {
  background: rgba(0, 0, 0, 0.07);
}

.shop-btn:disabled {
  opacity: 0.22;
  cursor: not-allowed;
}

.shop-btn .sc {
  font-size: 12px;
  font-weight: bold;
}

.shop-btn .sl {
  font-size: 8px;
  letter-spacing: 2px;
  color: var(--txt4);
}

#buy-line-btn .sc {
  color: var(--accent);
}

#buy-train-btn .sc {
  color: #7dd3fc;
}

#buy-train-btn.ready {
  border-color: rgba(125, 211, 252, 0.4);
  background: rgba(125, 211, 252, 0.05);
}

/* How-to-play panel button */
#htp-game-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 7px;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--txt6);
  font-family: inherit;
  font-size: 9px;
  letter-spacing: 2px;
  transition: all 0.18s;
  white-space: nowrap;
}

body.light #htp-game-btn {
  background: rgba(0, 0, 0, 0.03);
}

#htp-game-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border2);
  color: var(--txt);
}

body.light #htp-game-btn:hover {
  background: rgba(0, 0, 0, 0.07);
}

.psep {
  width: 1px;
  height: 28px;
  background: var(--border);
  flex-shrink: 0;
}

/* ══════════════════════════════════════════════════
   IN-GAME HOW-TO-PLAY DRAWER (slides up above panel)
══════════════════════════════════════════════════ */
#htp-drawer {
  position: fixed;
  bottom: 62px;
  left: 50%;
  transform: translateX(-50%);
  width: min(760px, 96vw);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px 12px 0 0;
  backdrop-filter: blur(20px);
  z-index: 19;
  padding: 18px 22px 14px;
  transition: opacity 0.25s, transform 0.25s, background 0.3s;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(20px);
}

#htp-drawer.open {
  opacity: 1;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

#htp-drawer h3 {
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--txt6);
  margin-bottom: 14px;
  text-align: center;
}

.htp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

.htp-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

body.light .htp-item {
  background: rgba(0, 0, 0, 0.03);
}

.htp-row1 {
  display: flex;
  align-items: center;
  gap: 8px;
}

.htp-icon {
  font-size: 16px;
  flex-shrink: 0;
}

.htp-title {
  font-size: 9px;
  letter-spacing: 2px;
  font-weight: bold;
  color: var(--txt8);
}

.htp-desc {
  font-size: 9px;
  letter-spacing: 0.5px;
  color: var(--txt6);
  line-height: 1.7;
}

/* ══════════════════════════════════════════════════
   PAUSE / MAIN OVERLAY
══════════════════════════════════════════════════ */
#overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  color: var(--txt);
  text-align: center;
  z-index: 100;
  transition: opacity 0.35s, background 0.3s;
  overflow-y: auto;
  padding: 20px 0;
}

#overlay.vis {
  display: flex;
}

#overlay.fade-out {
  opacity: 0;
  pointer-events: none;
}

/* Pause overlay — dimmer background */
#pause-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 90;
  backdrop-filter: blur(4px);
  transition: opacity 0.25s;
}

body.light #pause-overlay {
  background: rgba(200, 196, 186, 0.82);
}

#pause-overlay.vis {
  display: flex;
}

.pause-title {
  font-size: 44px;
  letter-spacing: 10px;
  color: var(--txt);
  margin-bottom: 4px;
}

.pause-sub {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--txt6);
  margin-bottom: 12px;
}

.pause-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ══════════════════════════════════════════════════
   OVERLAY SHARED ELEMENTS
══════════════════════════════════════════════════ */
.ov-logo {
  font-size: 52px;
  letter-spacing: 14px;
  font-weight: bold;
  color: var(--txt);
  margin-bottom: 4px;
}

.ov-tag {
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--txt4);
  margin-bottom: 24px;
}

/* Theme pills */
.theme-row {
  display: flex;
  gap: 8px;
  margin-bottom: 22px;
}

.theme-pill {
  padding: 6px 18px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 10px;
  letter-spacing: 3px;
  border: 1px solid var(--border);
  background: none;
  color: var(--txt6);
  font-family: inherit;
  transition: all 0.2s;
}

.theme-pill.on {
  background: var(--txt4);
  color: var(--bg);
  border-color: transparent;
}

.theme-pill:hover:not(.on) {
  border-color: var(--border2);
  color: var(--txt);
}

/* Difficulty cards */
.diff-row {
  display: flex;
  gap: 12px;
  margin-bottom: 22px;
  flex-wrap: wrap;
  justify-content: center;
}

.diff-card {
  width: 174px;
  padding: 18px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

body.light .diff-card {
  background: rgba(0, 0, 0, 0.02);
}

.diff-card:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-3px);
}

body.light .diff-card:hover {
  background: rgba(0, 0, 0, 0.05);
}

.diff-card.easy {
  border-color: rgba(46, 204, 113, 0.28);
}

.diff-card.normal {
  border-color: rgba(230, 168, 23, 0.28);
}

.diff-card.hard {
  border-color: rgba(231, 76, 60, 0.28);
}

.diff-card.sel.easy {
  border-color: rgba(46, 204, 113, 0.85);
  box-shadow: 0 0 22px rgba(46, 204, 113, 0.12);
}

.diff-card.sel.normal {
  border-color: rgba(230, 168, 23, 0.85);
  box-shadow: 0 0 22px rgba(230, 168, 23, 0.12);
}

.diff-card.sel.hard {
  border-color: rgba(231, 76, 60, 0.85);
  box-shadow: 0 0 22px rgba(231, 76, 60, 0.12);
}

.dlabel {
  font-size: 13px;
  letter-spacing: 5px;
  font-weight: bold;
}

.diff-card.easy .dlabel {
  color: #2ecc71;
}

.diff-card.normal .dlabel {
  color: #e6a817;
}

.diff-card.hard .dlabel {
  color: #e74c3c;
}

.dstat {
  font-size: 9px;
  color: var(--txt4);
  line-height: 2.1;
  text-align: left;
  width: 100%;
}

.drow {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.drow b {
  color: var(--txt8);
  font-weight: bold;
}

/* Menu how-to-play accordion */
.htp-acc-btn {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--txt4);
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  padding: 4px 12px;
  border-bottom: 1px dotted var(--border);
  transition: color 0.2s;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.htp-acc-btn:hover {
  color: var(--txt8);
}

.htp-acc-box {
  max-width: 720px;
  width: calc(100% - 32px);
  text-align: left;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px 22px;
  margin: 12px 0 0;
  display: none;
}

body.light .htp-acc-box {
  background: rgba(0, 0, 0, 0.03);
}

.htp-acc-box.open {
  display: block;
}

.htp-acc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
}

.htp-acc-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

.htp-acc-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.07);
  font-size: 14px;
}

body.light .htp-acc-icon {
  background: rgba(0, 0, 0, 0.07);
}

.htp-acc-txt {
  font-size: 10px;
  letter-spacing: 0.5px;
  color: var(--txt6);
  line-height: 1.75;
}

.htp-acc-txt b {
  color: var(--txt8);
  display: block;
  letter-spacing: 2px;
  margin-bottom: 2px;
  font-size: 9px;
}

/* Start / action buttons */
.ov-btn {
  padding: 12px 48px;
  background: transparent;
  border: 1px solid var(--border2);
  border-radius: 4px;
  color: var(--txt8);
  font-family: 'Courier New', monospace;
  font-size: 11px;
  letter-spacing: 5px;
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 4px;
}

.ov-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--txt);
}

body.light .ov-btn:hover {
  background: rgba(0, 0, 0, 0.07);
}

.ov-btn.dim {
  border-color: var(--border);
  color: var(--txt6);
}

/* Game over */
.go-title {
  font-size: 46px;
  letter-spacing: 10px;
  color: #e74c3c;
  text-shadow: 0 0 40px rgba(231, 76, 60, 0.4);
  margin-bottom: 6px;
}

.go-reason {
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--txt6);
  margin-bottom: 18px;
}

.go-score {
  font-size: 44px;
  color: var(--accent);
  letter-spacing: 4px;
  margin-bottom: 4px;
}

.go-sub {
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--txt4);
  margin-bottom: 24px;
}

.go-btns {
  display: flex;
  gap: 12px;
}

/* ══════════════════════════════════════════════════
   FLASH + INSERT BADGE
══════════════════════════════════════════════════ */
#flash {
  position: fixed;
  top: 66px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--flash-bg);
  border: 1px solid var(--border);
  color: var(--txt8);
  padding: 8px 24px;
  border-radius: 30px;
  font-size: 11px;
  letter-spacing: 2px;
  pointer-events: none;
  z-index: 30;
  opacity: 0;
  transition: opacity 0.25s;
  white-space: nowrap;
  font-weight: bold;
}

#flash.show {
  opacity: 1;
}

#insert-badge {
  position: fixed;
  bottom: 78px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(245, 230, 66, 0.12);
  border: 1px solid rgba(245, 230, 66, 0.4);
  color: rgba(245, 230, 66, 0.95);
  padding: 6px 20px;
  border-radius: 30px;
  font-size: 10px;
  letter-spacing: 2px;
  pointer-events: none;
  z-index: 30;
  opacity: 0;
  transition: opacity 0.25s;
  font-weight: bold;
}

#insert-badge.show {
  opacity: 1;
}

body.light #insert-badge {
  background: rgba(154, 107, 0, 0.1);
  border-color: rgba(154, 107, 0, 0.35);
  color: rgba(120, 80, 0, 0.95);
}