html {
  font-size: 1px;
}

/* Fonts copied from the Unity project (Hex.Text/Fonts):
   Eurostile Extended Black drives the board digits, Orbitron the UI. */
@font-face {
  font-family: "EurostileExt";
  src: url("../fonts/EurostileExtendedBlack.woff2") format("woff2"),
    url("../fonts/EurostileExtendedBlack.ttf") format("truetype");
  font-display: swap;
}

@font-face {
  font-family: "Orbitron";
  src: url("../fonts/Orbitron-Black.woff2") format("woff2"),
    url("../fonts/Orbitron-Black.ttf") format("truetype");
  font-weight: 900;
  font-display: swap;
}

@font-face {
  font-family: "Orbitron";
  src: url("../fonts/Orbitron-Bold.woff2") format("woff2"),
    url("../fonts/orbitron-bold.otf") format("opentype");
  font-weight: 700;
  font-display: swap;
}

/* Palette ported from Unity HexUIStyle.cs */
:root {
  --panel-bg: rgba(6, 14, 29, 0.82);
  --panel-border: rgba(41, 120, 219, 0.30);
  --text-primary: #b8d6f5;
  --text-secondary: rgba(102, 143, 184, 0.85);
  --accent: #00b8ff;
  --danger: #ff472e;
  --success: #26eb85;
  --backdrop: rgba(2, 4, 9, 0.72);
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;
  background: #020409;
  font-family: "Segoe UI", system-ui, sans-serif;
  font-size: 14rem;
  color: var(--text-primary);
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}

#board {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: grab;
}

#board.dragging {
  cursor: grabbing;
}

/* ---- HUD top bar ---- */

#hud {
  position: absolute;
  top: 14rem;
  left: 50%;
  transform: translateX(-50%);
  width: min(720rem, calc(100% - 28rem));
  height: 52rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20rem;
  border-radius: 12rem;
  background: linear-gradient(
    to bottom,
    rgba(6, 14, 29, 0.15),
    rgba(6, 14, 29, 0.88)
  );
  border: 1rem solid var(--panel-border);
  backdrop-filter: blur(8rem);
  box-shadow: 0 4rem 24rem rgba(0, 0, 0, 0.5);
}

.hud-group {
  display: flex;
  align-items: center;
  gap: 10rem;
  min-width: 120rem;
}

.hud-center {
  justify-content: center;
}

.hud-right {
  justify-content: flex-end;
}

.hud-label {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: 10rem;
  letter-spacing: 2rem;
  color: var(--text-secondary);
}

.hud-value {
  font-family: "Orbitron", "Consolas", monospace;
  font-size: 18rem;
  font-weight: 700;
  letter-spacing: 1rem;
  font-variant-numeric: tabular-nums;
}

.hud-value.danger {
  color: var(--danger);
}

.hud-btn {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 12rem;
  font-weight: 700;
  letter-spacing: 2rem;
  color: var(--text-primary);
  background: rgba(41, 120, 219, 0.12);
  border: 1rem solid var(--panel-border);
  border-radius: 8rem;
  padding: 8rem 18rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.hud-btn:hover {
  background: rgba(41, 120, 219, 0.28);
  border-color: var(--accent);
}

.hud-btn.active {
  background: rgba(41, 120, 219, 0.3);
  border-color: var(--accent);
}

.hud-btn.accent {
  color: var(--accent-text, #04121d);
  background: var(--accent);
  border-color: var(--accent);
}

.hud-btn.accent:hover {
  filter: brightness(1.18);
}

.hud-btn.icon {
  padding: 8rem 12rem;
  font-size: 14rem;
  line-height: 1;
}

.hidden {
  display: none !important;
}

/* ---- Full-page screens (title, level select) ---- */

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--backdrop);
  z-index: 20;
  overflow-x: hidden;
  overflow-y: auto;
  /* Sit below the shared ad strip when it is visible */
  top: var(--fg-ad-h, 0px);
}

.title-inner {
  text-align: center;
  padding: 24rem 16rem;
  width: min(100%, 100vw);
  max-width: 100%;
  box-sizing: border-box;
}

.game-title {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 900;
  /* Cap by viewport width so HEXABOMBS never clips left/right (esp. with ad strip). */
  font-size: min(72rem, 9vh, 11.5vw);
  letter-spacing: 0.08em;
  margin-left: 0.08em; /* recenters letter-spaced text */
  color: var(--text-primary);
  text-shadow: 0 0 32rem var(--accent-glow, rgba(0, 184, 255, 0.45)),
    0 0 90rem var(--accent-glow, rgba(0, 184, 255, 0.25));
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
}

.game-subtitle {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: min(15rem, 2vh, 3.6vw);
  letter-spacing: 0.28em;
  margin-left: 0.28em;
  color: var(--text-secondary);
  margin-top: 10rem;
  margin-bottom: 36rem;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
}

.title-buttons,
.menu-buttons {
  display: flex;
  flex-direction: column;
  gap: 14rem;
  align-items: center;
}

.menu-btn {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 15rem;
  font-weight: 700;
  letter-spacing: 3rem;
  width: min(300rem, 90%);
  padding: 14rem 0;
  color: var(--text-primary);
  background: rgba(41, 120, 219, 0.12);
  border: 1rem solid var(--panel-border);
  border-radius: 10rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, filter 0.15s;
}

.menu-btn:hover {
  background: rgba(41, 120, 219, 0.28);
  border-color: var(--accent);
}

.menu-btn.accent {
  color: var(--accent-text, #04121d);
  background: var(--accent);
  border-color: var(--accent);
}

.menu-btn.accent:hover {
  filter: brightness(1.18);
}

.link-btn {
  margin-top: 20rem;
  background: none;
  border: none;
  cursor: pointer;
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 10rem;
  letter-spacing: 2rem;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.link-btn:hover {
  color: var(--text-primary);
}

/* ---- Level select ---- */

.level-inner {
  width: min(720rem, calc(100% - 28rem));
  max-height: calc(100% - 48rem);
  padding: 22rem 24rem 26rem;
  border-radius: 16rem;
  background: var(--panel-bg);
  border: 1rem solid var(--panel-border);
  backdrop-filter: blur(10rem);
  box-shadow: 0 8rem 48rem rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
}

.screen-header {
  display: flex;
  align-items: center;
  gap: 14rem;
  margin-bottom: 18rem;
}

.screen-title {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 900;
  font-size: 18rem;
  letter-spacing: 5rem;
  color: var(--text-primary);
}

.screen-title.center {
  text-align: center;
  margin-bottom: 22rem;
}

.level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120rem, 1fr));
  gap: 10rem;
  overflow-y: auto;
  padding-right: 4rem;
}

.level-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5rem;
  padding: 12rem 8rem 10rem;
  border-radius: 10rem;
  background: rgba(41, 120, 219, 0.08);
  border: 1rem solid var(--panel-border);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.level-card:hover:not(:disabled) {
  background: rgba(41, 120, 219, 0.22);
  border-color: var(--accent);
}

.level-card:disabled {
  opacity: 0.35;
  cursor: default;
}

.level-card.current {
  border-color: var(--accent);
  background: rgba(41, 120, 219, 0.14);
}

.level-card .lc-num {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 900;
  font-size: 20rem;
  color: var(--text-primary);
}

.level-card .lc-dot {
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  border: 1rem solid rgba(255, 255, 255, 0.25);
}

.level-card .lc-dot.inv {
  border-radius: 3rem; /* square dot marks inverted levels */
}

.level-card .lc-info {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 8rem;
  letter-spacing: 0.5rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.level-card .lc-best {
  font-family: "Orbitron", "Consolas", monospace;
  font-size: 9rem;
  letter-spacing: 0.5rem;
  color: var(--success);
  font-variant-numeric: tabular-nums;
}

.level-card .lc-lock {
  font-size: 14rem;
  color: var(--text-secondary);
}

.level-card .lc-progress {
  position: relative;
  width: calc(100% - 8rem);
  height: 13rem;
  border-radius: 7rem;
  background: rgba(184, 214, 245, 0.12);
  border: 1rem solid rgba(184, 214, 245, 0.18);
  overflow: hidden;
}

.level-card .lc-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  opacity: 0.75;
}

.level-card .lc-progress-label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 8rem;
  font-weight: 700;
  letter-spacing: 0.5rem;
  color: var(--text-primary);
  text-shadow: 0 0 3rem rgba(0, 0, 0, 0.8);
}

/* ---- Modals (help, pause, win/lose) ---- */

.modal {
  position: absolute;
  inset: 0;
  top: var(--fg-ad-h, 0px); /* after inset so ad strip does not cover menus */
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--backdrop);
  /* Above .screen (20) so help opens over the title screen. */
  z-index: 30;
}

.modal-panel {
  width: min(560rem, calc(100% - 28rem));
  max-height: calc(100% - 48rem);
  overflow-y: auto;
  padding: 26rem 32rem 30rem;
  border-radius: 16rem;
  background: var(--panel-bg);
  border: 1rem solid var(--panel-border);
  backdrop-filter: blur(10rem);
  box-shadow: 0 8rem 48rem rgba(0, 0, 0, 0.7);
}

.modal-panel.narrow {
  width: auto;
  min-width: min(380rem, calc(100% - 28rem));
  text-align: center;
  padding: 40rem 56rem;
}

.help-body {
  font-size: 13rem;
  line-height: 1.7;
  color: var(--text-primary);
}

.help-body p {
  margin-bottom: 14rem;
}

.help-list {
  list-style: none;
  margin-bottom: 14rem;
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.help-body b {
  color: var(--accent);
  font-weight: 600;
}

.help-sum {
  color: var(--text-secondary);
  font-size: 12rem;
}

.help-columns {
  display: flex;
  gap: 24rem;
  margin-bottom: 14rem;
}

.help-col {
  flex: 1;
  min-width: 0;
}

.help-col-title {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 700;
  font-size: 11rem;
  letter-spacing: 3rem;
  color: var(--text-secondary);
  margin-bottom: 8rem;
}

/* The device's own column is listed first and highlighted. */
.help-col.primary .help-col-title {
  color: var(--accent);
}

.help-chord {
  color: var(--text-secondary);
  font-size: 12rem;
}

/* ---- Sum clue diagrams (grid of all totals 1-21) ---- */

.bomb-word {
  font-weight: 600;
}

.bomb-word.red {
  color: var(--danger);
}

.bomb-word.gray {
  color: #8b95a6;
}

.sum-rows {
  display: flex;
  flex-direction: column;
  gap: 4rem;
  margin-top: 12rem;
}

.sum-row {
  display: flex;
  align-items: center;
  gap: 16rem;
}

.sum-row-hexes {
  display: flex;
  gap: 4rem;
  flex-shrink: 0;
}

.sum-row-hexes svg {
  display: block;
  width: 110rem;
  height: 110rem;
}

.sum-row .sum-row-text {
  font-size: 13rem;
  line-height: 1.6;
  color: var(--text-primary);
  margin: 0;
}

.sum-rows .sg-center {
  font-family: "EurostileExt", "Orbitron", sans-serif;
  font-size: 24rem;
  font-weight: 900;
  fill: #ffffff;
  text-anchor: middle;
  dominant-baseline: middle;
}

.sum-rows .sg-side {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 9rem;
  font-weight: 700;
  fill: var(--accent);
  opacity: 0.85;
  text-anchor: middle;
  dominant-baseline: middle;
}

@media (max-width: 480px) {
  .help-columns {
    flex-direction: column;
    gap: 14rem;
  }

  .sum-row-hexes svg {
    width: 88rem;
    height: 88rem;
  }
}

/* ---- Level debug panel ---- */

.debug-panel {
  position: absolute;
  left: 14rem;
  bottom: 14rem;
  width: 200rem;
  padding: 10rem 12rem;
  border-radius: 10rem;
  background: var(--panel-bg);
  border: 1rem solid var(--panel-border);
  backdrop-filter: blur(8rem);
  box-shadow: 0 4rem 24rem rgba(0, 0, 0, 0.5);
  z-index: 5;
}

.debug-header {
  cursor: pointer;
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 10rem;
  font-weight: 700;
  letter-spacing: 2rem;
  color: var(--text-secondary);
}

.debug-body {
  margin-top: 8rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.debug-level {
  display: flex;
  align-items: center;
  gap: 8rem;
  padding: 4rem 8rem;
  background: none;
  border: 1rem solid transparent;
  border-radius: 6rem;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}

.debug-level:hover {
  background: rgba(41, 120, 219, 0.15);
}

.debug-level.selected {
  border-color: var(--accent);
  background: rgba(41, 120, 219, 0.1);
}

.debug-level .lv-num {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-weight: 900;
  font-size: 12rem;
  color: var(--text-primary);
  width: 18rem;
  text-align: right;
  flex-shrink: 0;
}

.debug-level .lv-dot {
  width: 10rem;
  height: 10rem;
  border-radius: 50%;
  border: 1rem solid rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

.debug-level .lv-info {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 8rem;
  letter-spacing: 0.5rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.debug-sliders {
  margin-top: 8rem;
  padding-top: 8rem;
  border-top: 1rem solid var(--panel-border);
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

.debug-slider {
  display: flex;
  align-items: center;
  gap: 6rem;
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 8rem;
  letter-spacing: 0.5rem;
  color: var(--text-secondary);
}

.debug-slider span:first-child {
  width: 58rem;
  flex-shrink: 0;
}

.debug-slider input[type="range"] {
  flex: 1;
  min-width: 0;
  accent-color: var(--accent);
}

.debug-slider-val {
  width: 26rem;
  text-align: right;
  color: var(--text-primary);
  flex-shrink: 0;
}

/* ---- Win / lose overlay ---- */

#overlay .modal-panel h1 {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: clamp(26rem, 6vh, 40rem);
  font-weight: 900;
  letter-spacing: 8rem;
  margin-bottom: 12rem;
}

#overlay .modal-panel h1.danger {
  color: var(--danger);
  text-shadow: 0 0 24rem rgba(255, 71, 46, 0.5);
}

#overlay .modal-panel h1.success {
  color: var(--success);
  text-shadow: 0 0 24rem rgba(38, 235, 133, 0.5);
}

#overlayTime {
  font-family: "Orbitron", "Consolas", monospace;
  font-weight: 700;
  font-size: 18rem;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.overlay-best {
  font-family: "Orbitron", "Segoe UI", sans-serif;
  font-size: 11rem;
  letter-spacing: 2rem;
  color: var(--success);
  margin-top: 8rem;
}

.overlay-buttons {
  display: flex;
  gap: 14rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 26rem;
}

/* ---- Small screens ---- */

@media (max-width: 560px) {
  #hud {
    height: 46rem;
    padding: 0 10rem;
  }

  .hud-group {
    min-width: 0;
    gap: 6rem;
  }

  .hud-value {
    font-size: 14rem;
  }

  #timer {
    font-size: 12rem;
  }

  .hud-btn {
    padding: 7rem 10rem;
    font-size: 10rem;
    letter-spacing: 1rem;
  }

  .modal-panel.narrow {
    padding: 30rem 24rem;
  }
}