:root {
  --bg-0: #08141b;
  --bg-1: #122734;
  --bg-2: #1a3a4a;
  --surface-0: #0f202b;
  --surface-1: #142a38;
  --surface-2: #1b3948;
  --surface-3: #244757;
  --line-soft: #2d5a6c;
  --line-strong: #3f7286;
  --text-main: #eaf4fb;
  --text-soft: #a9c0cd;
  --text-dim: #7f9ba9;
  --mint: #1ed6a5;
  --mint-deep: #109778;
  --cyan: #6bcbff;
  --amber: #ffb84d;
  --danger: #ff7a7a;
  --success: #35d89f;
  --panel-shadow: 0 22px 56px #0000006e;
  --panel-radius: 22px;
  --display-font: "Oxanium", "Sora", sans-serif;
  --ui-font: "Plus Jakarta Sans", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--ui-font);
  color: var(--text-main);
  background:
    radial-gradient(circle at 11% 10%, #2da6ff26 0%, transparent 36%),
    radial-gradient(circle at 88% 8%, #2ce0aa30 0%, transparent 42%),
    linear-gradient(150deg, var(--bg-0), var(--bg-1) 48%, var(--bg-2));
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  opacity: 0.33;
  background:
    linear-gradient(#ffffff08 1px, transparent 1px),
    linear-gradient(90deg, #ffffff08 1px, transparent 1px),
    linear-gradient(120deg, #ffffff08 0%, #ffffff00 40%, #ffffff0d 52%, #ffffff00 70%);
  background-size:
    32px 32px,
    32px 32px,
    100% 100%;
}

body::after {
  opacity: 0.36;
  background:
    radial-gradient(circle at 15% 80%, #61caff17 0%, transparent 42%),
    radial-gradient(circle at 78% 78%, #25d6a91f 0%, transparent 50%);
}

.ambient-blur {
  position: fixed;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  pointer-events: none;
  filter: blur(88px);
  opacity: 0.27;
  animation: blur-float 11s ease-in-out infinite alternate;
}

.blur-a {
  top: -220px;
  right: -170px;
  background: #4fc5ff;
}

.blur-b {
  left: -180px;
  bottom: -210px;
  background: #27dba4;
  animation-delay: 1.5s;
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1210px, 94vw);
  margin: 26px auto;
  display: grid;
  grid-template-columns: minmax(300px, 370px) 1fr;
  gap: 18px;
  align-items: start;
  animation: shell-in 620ms cubic-bezier(0.22, 0.96, 0.16, 1) both;
}

.panel {
  position: relative;
  border: 1px solid #2b5a6d;
  border-radius: var(--panel-radius);
  background:
    linear-gradient(165deg, #153241f5, #0f212cf5),
    var(--surface-0);
  box-shadow: var(--panel-shadow);
  overflow: hidden;
}

.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 15%, #7de2ff1f 0%, transparent 34%),
    radial-gradient(circle at 87% 88%, #2de6ad17 0%, transparent 40%);
}

.sidebar {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.play-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.play-sidebar[hidden],
.hub-info-view[hidden],
.hub-pane[hidden] {
  display: none;
}

.headline {
  border: 1px solid #295367;
  border-radius: 15px;
  padding: 12px 12px 11px;
  background: linear-gradient(145deg, #1b3a4b85, #12273485);
}

.headline h1 {
  margin: 4px 0 6px;
  font-family: var(--display-font);
  font-size: clamp(2rem, 3.7vw, 2.75rem);
  line-height: 0.96;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #f3fbff;
  text-shadow:
    0 0 0 #000,
    0 0 20px #75d8ff33,
    0 0 30px #28d6a622;
  animation: title-hum 3.8s ease-in-out infinite;
}

.eyebrow {
  margin: 0;
  font-size: 0.69rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.subtitle {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.9rem;
  line-height: 1.37;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.stat-card {
  border: 1px solid #2e5f72;
  border-radius: 12px;
  padding: 10px 10px 9px;
  background: linear-gradient(145deg, #1d3f518f, #1127358f);
  box-shadow: inset 0 1px #ffffff12;
}

.stat-card .label {
  display: block;
  font-size: 0.69rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: 700;
}

.stat-card strong {
  display: block;
  margin-top: 2px;
  font-family: var(--display-font);
  font-size: 1.18rem;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: #ecf8ff;
}

.status-box {
  border: 1px solid #35677c;
  border-radius: 12px;
  padding: 11px 12px;
  font-size: 0.9rem;
  font-weight: 500;
  color: #cae6f5;
  background:
    linear-gradient(130deg, #1c3b4dca, #122836ca),
    var(--surface-1);
}

.status-box.status-win {
  border-color: #2ab18a;
  color: #d3ffe9;
  background:
    linear-gradient(130deg, #1b453ac9, #113128c9),
    #153228;
}

.status-box.status-loss {
  border-color: #b84e54;
  color: #ffdfe1;
  background:
    linear-gradient(130deg, #4d1f28c7, #2f161bc7),
    #311319;
}

.status-actions {
  display: inline-flex;
  gap: 6px;
  margin-left: 10px;
}

.status-action-btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  padding: 3px 10px;
  font-family: "Plus Jakarta Sans", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.status-action-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.45);
}

.status-action-btn:active {
  background: rgba(255, 255, 255, 0.28);
}

.button-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Mobile play controls: hidden on desktop */
.mobile-play-controls {
  display: none;
}

.hub-menu {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.hub-menu button {
  min-height: 42px;
  padding: 9px 8px;
  font-size: 0.79rem;
  text-transform: none;
  letter-spacing: 0.02em;
}

.hub-menu button.active {
  border-color: #6fd2ff;
  box-shadow:
    0 0 0 1px #89dfff99 inset,
    0 0 14px #76d0ff5a;
}

button {
  appearance: none;
  border: 1px solid #3a7489;
  border-radius: 12px;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #dff2ff;
  background:
    linear-gradient(148deg, #1c4052, #15303f),
    #173647;
  cursor: pointer;
  transition:
    transform 180ms ease,
    filter 180ms ease,
    box-shadow 180ms ease,
    opacity 180ms ease;
}

button:hover:not(:disabled) {
  filter: brightness(1.08);
  box-shadow: 0 0 0 1px #7bd7ff3b inset;
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button.primary {
  border-color: #26ba93;
  color: #e8fff8;
  background:
    linear-gradient(150deg, var(--mint), var(--mint-deep)),
  var(--mint);
  box-shadow: 0 0 18px #1ed6a541;
  animation: cta-pulse 2.6s ease-in-out infinite;
}

.hint-btn {
  border-color: #b8862d;
  color: #fff3da;
  background:
    linear-gradient(150deg, #e2a542, #c07f21),
    var(--amber);
  box-shadow: 0 0 16px #ffb84d45;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

button kbd {
  display: inline-block;
  margin-left: 4px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  padding: 1px 5px;
  font-family: var(--display-font);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.65);
  background: rgba(255, 255, 255, 0.08);
  vertical-align: 1px;
}

.panel-inset {
  border: 1px solid #305f73;
  border-radius: 13px;
  padding: 10px 12px;
  background: linear-gradient(145deg, #1a38498f, #1027368f);
}

.panel-inset h2 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  font-family: var(--display-font);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #eff8ff;
}

.panel-inset p {
  margin: 4px 0;
  font-size: 0.84rem;
  color: var(--text-soft);
}

/* Collapsible rules section */
details.rules-details summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

details.rules-details summary::-webkit-details-marker {
  display: none;
}

details.rules-details summary::after {
  content: "▸";
  font-size: 0.7em;
  color: var(--text-soft);
  transition: transform 0.2s;
}

details.rules-details[open] summary::after {
  transform: rotate(90deg);
}

details.rules-details summary h2 {
  margin: 0;
}

.challenge-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.challenge-controls {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.challenge-controls input {
  min-width: 0;
  border: 1px solid #3a7489;
  border-radius: 10px;
  padding: 9px 10px;
  font: inherit;
  font-size: 0.85rem;
  color: #dff1fb;
  background: linear-gradient(145deg, #152f3f, #112734);
}

.challenge-controls input:focus {
  outline: 2px solid #6fd2ff80;
  outline-offset: 1px;
}

.challenge-meta {
  margin: 0;
  font-size: 0.79rem;
  color: #b6ccda;
}

.challenge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.challenge-pill {
  border: 1px solid #3f7488;
  border-radius: 999px;
  min-height: 32px;
  padding: 6px 10px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

.challenge-pill.active {
  border-color: #7ad4ff;
  box-shadow:
    0 0 0 1px #86dfff8a inset,
    0 0 10px #6bccff61;
}

.challenge-pill.solved {
  border-color: #31be94;
  color: #d9fff1;
  background: linear-gradient(145deg, #1f8e72, #145f4d);
}

.challenge-results-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.challenge-totals {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
}

.mini-stat {
  border: 1px solid #35687c;
  border-radius: 10px;
  padding: 8px;
  background: linear-gradient(150deg, #1a3b4a8f, #1127378f);
}

.mini-stat .label {
  display: block;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9cb8c8;
}

.mini-stat strong {
  display: block;
  margin-top: 2px;
  font-family: var(--display-font);
  font-size: 0.94rem;
  letter-spacing: 0.03em;
}

.challenge-split-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 240px;
  overflow: auto;
  padding-right: 2px;
}

.split-row {
  border: 1px solid #355f72;
  border-radius: 10px;
  padding: 8px 9px;
  background: linear-gradient(145deg, #1737478f, #1128388f);
}

.split-row.done {
  border-color: #2ea885;
  background: linear-gradient(145deg, #19443d8f, #122f2a8f);
}

.split-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #d6eefb;
}

.split-meta {
  margin-top: 2px;
  font-size: 0.71rem;
  color: #a9c2d1;
}

.challenge-export-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.challenge-export-row button {
  min-height: 38px;
  font-size: 0.73rem;
}

.level-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 7px;
}

.level-section-actions {
  margin-bottom: 8px;
}

.level-select-open-btn {
  width: 100%;
  border-color: #4b89a1;
  background:
    linear-gradient(150deg, #28556c, #1b3f53),
    #21485d;
}

.level-btn {
  min-height: 42px;
  padding: 0;
  font-size: 0.87rem;
}

.level-btn.active {
  border-color: #76cfff;
  box-shadow:
    0 0 0 1px #7fd6ff88 inset,
    0 0 14px #6fd1ff4f;
}

.level-btn.solved {
  border-color: #2cb68f;
  color: #d6ffef;
  background: linear-gradient(145deg, #209e7d, #13735c);
}

.level-btn.locked {
  border-style: dashed;
  color: #88a2b2;
}

.board-panel {
  padding: 16px;
}

.hub-info-view {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hub-pane {
  border: 1px solid #2f6074;
  border-radius: 16px;
  padding: 14px;
  background: linear-gradient(145deg, #1a3a4b94, #12293794);
}

.hub-pane-head h2 {
  margin: 4px 0 6px;
  font-family: var(--display-font);
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hub-pane-head p {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.9rem;
}

.hub-mini-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.hub-mini-card {
  border: 1px solid #366a7f;
  border-radius: 12px;
  padding: 10px;
  background: linear-gradient(150deg, #1b3e4f8f, #112a3a8f);
}

.hub-mini-card .label {
  display: block;
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #97b4c5;
}

.hub-mini-card strong {
  display: block;
  margin-top: 3px;
  font-family: var(--display-font);
  font-size: 1rem;
  letter-spacing: 0.03em;
}

.hub-subpanel {
  margin-top: 12px;
}

.hub-subpanel h3 {
  margin: 0;
  font-family: var(--display-font);
  font-size: 0.92rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #d7ecf8;
}

.difficulty-stats-wrap {
  margin-top: 8px;
  border: 1px solid #345f73;
  border-radius: 12px;
  background: linear-gradient(145deg, #1737478f, #1128388f);
  overflow-x: auto;
}

.difficulty-stats-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.difficulty-stats-table th,
.difficulty-stats-table td {
  padding: 8px 10px;
  text-align: left;
  font-size: 0.74rem;
  border-bottom: 1px solid #2f5467;
  font-variant-numeric: tabular-nums;
}

.difficulty-stats-table th {
  color: #a9c0ce;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  background: #112938a3;
}

.difficulty-stats-table td {
  color: #e3f2fb;
}

.difficulty-stats-table tbody tr:last-child td {
  border-bottom: none;
}

.run-stats-grid {
  margin-top: 8px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hub-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 360px;
  overflow: auto;
  padding-right: 2px;
}

.hub-run-row {
  border: 1px solid #355f72;
  border-radius: 12px;
  padding: 9px 10px;
  background: linear-gradient(145deg, #1737478f, #1128388f);
  cursor: pointer;
}

.hub-run-row:hover {
  border-color: #4a7e93;
}

.hub-run-row:focus-visible {
  outline: 2px solid #79d5ff;
  outline-offset: 2px;
}

.hub-run-row.active {
  border-color: #7ad4ff;
  box-shadow:
    0 0 0 1px #86dfff8a inset,
    0 0 12px #6bccff5c;
  background: linear-gradient(145deg, #214b5d93, #17374793);
}

.hub-run-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #dbf2ff;
}

.hub-run-meta {
  margin-top: 3px;
  font-size: 0.73rem;
  color: #aac4d3;
}

.hub-empty {
  margin: 10px 0 0;
  color: var(--text-soft);
  font-size: 0.86rem;
}

.run-detail-content {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.run-detail-summary {
  margin: 0;
  color: #c6deea;
  font-size: 0.76rem;
  letter-spacing: 0.02em;
}

.run-detail-grid {
  margin-top: 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.run-detail-card strong.metric-better {
  color: #c9f8e8;
}

.run-detail-card strong.metric-worse {
  color: #ffd6d6;
}

.run-detail-subtitle {
  margin: 4px 0 0;
  color: #a6c3d3;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 700;
}

.highscore-split-list {
  max-height: 310px;
}

.achievement-list {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  max-height: 430px;
  overflow: auto;
  padding-right: 2px;
}

.achievement-item {
  border: 1px solid #4a5f6b;
  border-radius: 12px;
  padding: 10px;
  background: linear-gradient(145deg, #2536428a, #1a2b348a);
}

.achievement-tier {
  display: inline-block;
  border: 1px solid #5d6f7a;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: #c7d9e3;
  background: #233742cc;
}

.achievement-item.tier-bronze .achievement-tier {
  border-color: #b48348;
  color: #ffdcb4;
  background: #56371dcc;
}

.achievement-item.tier-silver .achievement-tier {
  border-color: #95a9b9;
  color: #e6f2ff;
  background: #3f4f5ccc;
}

.achievement-item.tier-gold .achievement-tier {
  border-color: #d3a543;
  color: #fff3d2;
  background: #5d4318cc;
}

.achievement-item.tier-platinum .achievement-tier {
  border-color: #8ac0d9;
  color: #e8fbff;
  background: #2f5668cc;
}

.achievement-header {
  display: flex;
  align-items: center;
  gap: 8px;
}

.achievement-icon {
  font-size: 1.3rem;
}

.achievement-name {
  margin-top: 7px;
  font-size: 0.79rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: #deeffa;
}

.achievement-item.locked .achievement-name {
  color: #6a7a88;
}

.achievement-item.locked {
  opacity: 0.55;
}

.achievement-meta {
  margin-top: 4px;
  font-size: 0.73rem;
  color: #aac3d2;
}

.achievement-item.unlocked .achievement-meta {
  color: #c9f5e7;
}

.achievement-item.tier-bronze.unlocked {
  border-color: #cf9955;
  background: linear-gradient(145deg, #5a3d248a, #3321178a);
}

.achievement-item.tier-silver.unlocked {
  border-color: #adc2d3;
  background: linear-gradient(145deg, #5062748a, #3645528a);
}

.achievement-item.tier-gold.unlocked {
  border-color: #e1b455;
  background: linear-gradient(145deg, #654b208a, #3d2c148a);
}

.achievement-item.tier-platinum.unlocked {
  border-color: #8fd8ff;
  background: linear-gradient(145deg, #2f61798a, #1d3f518a);
}

.credits-card {
  margin-top: 12px;
  border: 1px solid #3d7085;
  border-radius: 14px;
  padding: 13px;
  background: linear-gradient(145deg, #1d3f508f, #122b3b8f);
}

.credits-card h3 {
  margin: 0 0 6px;
  font-family: var(--display-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.credits-card p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.45;
}

.board-live-stats {
  display: flex;
  gap: 10px;
  align-items: center;
}

.live-stat {
  border: 1px solid #2f6075;
  border-radius: 8px;
  padding: 5px 10px;
  font-family: var(--display-font);
  font-size: 0.82rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
  color: #b8ddef;
  background: linear-gradient(145deg, #142e3d8f, #0f24328f);
}

.board-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.board-head h2 {
  margin: 3px 0 0;
  font-family: var(--display-font);
  font-size: clamp(1.45rem, 2.5vw, 1.85rem);
  line-height: 1.08;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.board-help {
  margin: 0;
  max-width: 320px;
  font-size: 0.84rem;
  color: var(--text-soft);
}

.board-stage {
  position: relative;
  border: 1px solid #3a748c;
  border-radius: 16px;
  padding: 14px;
  background:
    linear-gradient(145deg, #1b3d4d96, #10273696),
    var(--surface-1);
  overflow: hidden;
}

.board-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  background:
    linear-gradient(#ffffff07 1px, transparent 1px),
    linear-gradient(90deg, #ffffff07 1px, transparent 1px);
  background-size: 26px 26px;
}

.board-stage::after {
  content: "";
  position: absolute;
  inset: -30% -45%;
  pointer-events: none;
  opacity: 0.26;
  background: linear-gradient(115deg, #ffffff00 42%, #7cd6ff14 50%, #ffffff00 58%);
  animation: signal-sweep 9s linear infinite;
}

.board-penalty-float {
  position: absolute;
  z-index: 4;
  pointer-events: none;
  transform: translate(-50%, -50%);
  border: 1px solid #f3c87b;
  border-radius: 999px;
  padding: 4px 8px;
  font-family: var(--display-font);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: #ffddab;
  text-shadow: 0 0 10px #ffbe6975;
  background: linear-gradient(145deg, #6f4318db, #41240fdb);
  box-shadow:
    0 0 0 1px #ffd79f44 inset,
    0 0 12px #ffb5607a;
  animation: board-penalty-rise 700ms cubic-bezier(0.25, 0.9, 0.25, 1) forwards;
}

.stage-corners span {
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid #4d91ad;
  opacity: 0.44;
  pointer-events: none;
}

.stage-corners span:nth-child(1) {
  top: 8px;
  left: 8px;
  border-right: 0;
  border-bottom: 0;
}

.stage-corners span:nth-child(2) {
  top: 8px;
  right: 8px;
  border-left: 0;
  border-bottom: 0;
}

.stage-corners span:nth-child(3) {
  bottom: 8px;
  right: 8px;
  border-left: 0;
  border-top: 0;
}

.stage-corners span:nth-child(4) {
  bottom: 8px;
  left: 8px;
  border-right: 0;
  border-top: 0;
}

.board {
  --cols: 5;
  --rows: 5;
  --cell-size: clamp(50px, 6.1vw, 88px);
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-size));
  grid-template-rows: repeat(var(--rows), var(--cell-size));
  gap: 0;
  justify-content: center;
  border: 1px solid #2f6075;
  border-radius: 12px;
  overflow: hidden;
  background: linear-gradient(160deg, #102938, #0f2532);
  touch-action: none;
  user-select: none;
}

.board.invalid {
  animation: board-shake 250ms ease;
}

.board.board-lost {
  box-shadow: 0 0 28px 6px rgba(184, 78, 84, 0.45);
  animation: board-lost-pulse 1.8s ease-in-out infinite;
}

.board.board-lost .cell.playable:not(.visited) {
  background:
    radial-gradient(circle at 50% 50%, #ff4d4d14 0%, transparent 62%),
    #1a1518;
  border-color: #5a3338;
}

.board.board-lost .cell.playable:not(.visited) .trace-core {
  background: radial-gradient(circle at 32% 26%, #ffd0d0, #b86868 72%);
  box-shadow:
    0 0 0 2px #c26a6a5e inset,
    0 0 8px #c2565648;
}

button.cell,
div.cell {
  appearance: none;
  border: 0;
  margin: 0;
  padding: 0;
  font: inherit;
}

.cell {
  position: relative;
  border: 1px solid #234b5e;
  border-radius: 0;
  background:
    radial-gradient(circle at 50% 50%, #6fbfe611 0%, #6fbfe600 62%),
    #102736;
  overflow: hidden;
  transition:
    border-color 150ms ease,
    box-shadow 150ms ease,
    background 160ms ease;
}

.cell.playable {
  cursor: pointer;
}

.cell.playable:hover {
  border-color: #4e88a1;
}

.cell.playable::after {
  content: attr(data-step);
  position: absolute;
  right: 6px;
  top: 5px;
  z-index: 3;
  font-size: 0.69rem;
  font-family: var(--display-font);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #b0d9eb;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity 160ms ease, transform 160ms ease;
}

.cell.blocked {
  border-color: #2c5263;
  background:
    linear-gradient(
      45deg,
      #0b1b25 0%,
      #0b1b25 20%,
      #173241 20%,
      #173241 40%,
      #0b1b25 40%,
      #0b1b25 60%,
      #173241 60%,
      #173241 80%,
      #0b1b25 80%,
      #0b1b25 100%
    );
  background-size: 16px 16px;
}

.cell.blocked::before {
  content: "";
  position: absolute;
  inset: 21%;
  border-radius: 7px;
  border: 1px solid #355f72;
  background: linear-gradient(145deg, #183442, #0f2430);
  box-shadow: inset 0 0 0 1px #6fa9c11f;
}

.trace {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.trace::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 24px;
  height: 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.84);
  transition:
    opacity 150ms ease,
    transform 150ms ease,
    border-color 150ms ease,
    box-shadow 150ms ease;
}

.trace-arm {
  position: absolute;
  border-radius: 999px;
  background: linear-gradient(180deg, #89dfff, #23d4a8);
  opacity: 0;
  box-shadow: 0 0 10px #6fcfff66;
  transition: opacity 160ms ease, transform 180ms cubic-bezier(0.25, 0.85, 0.2, 1);
}

.arm-up,
.arm-down {
  left: 50%;
  width: 6px;
  height: 50%;
}

.arm-left,
.arm-right {
  top: 50%;
  width: 50%;
  height: 6px;
}

.arm-up {
  top: 0;
  transform: translateX(-50%) scaleY(0.15);
  transform-origin: center bottom;
}

.arm-down {
  bottom: 0;
  transform: translateX(-50%) scaleY(0.15);
  transform-origin: center top;
}

.arm-left {
  left: 0;
  transform: translateY(-50%) scaleX(0.15);
  transform-origin: right center;
}

.arm-right {
  right: 0;
  transform: translateY(-50%) scaleX(0.15);
  transform-origin: left center;
}

.trace-core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 26%, #dff5ff, #7da7bc 72%);
  box-shadow:
    0 0 0 2px #8fb8ca5e inset,
    0 0 8px #7ebad348;
  opacity: 0.66;
  transform: translate(-50%, -50%) scale(0.86);
  transition:
    opacity 150ms ease,
    transform 150ms ease,
    box-shadow 150ms ease,
    background 150ms ease;
}

.cell.visited {
  border-color: #2f6075;
  background:
    radial-gradient(circle at 50% 50%, #1bd3a71a 0%, #1bd3a700 70%),
    #102937;
}

.cell.visited::after {
  opacity: 0.92;
  transform: translateY(0px);
}

.cell.visited .trace-core {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.04);
  background: radial-gradient(circle at 32% 26%, #e8ffff, #2fd5aa 70%);
  box-shadow:
    0 0 0 2px #4ad0b172 inset,
    0 0 14px #52d8b799;
}

.cell.conn-up .arm-up {
  opacity: 1;
  transform: translateX(-50%) scaleY(1);
}

.cell.conn-down .arm-down {
  opacity: 1;
  transform: translateX(-50%) scaleY(1);
}

.cell.conn-left .arm-left {
  opacity: 1;
  transform: translateY(-50%) scaleX(1);
}

.cell.conn-right .arm-right {
  opacity: 1;
  transform: translateY(-50%) scaleX(1);
}

.cell.start::before {
  content: "S";
  position: absolute;
  bottom: 6px;
  left: 6px;
  z-index: 3;
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #9ac9df;
}

.cell.end {
  border-color: #a1824f;
  box-shadow: 0 0 0 1px #bfa06e75 inset;
}

.cell.end::before {
  content: "E";
  position: absolute;
  bottom: 6px;
  right: 6px;
  z-index: 3;
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #dfb89a;
}

.cell.end.visited {
  border-color: #c9a355;
  box-shadow:
    0 0 0 1px #e0c07580 inset,
    0 0 12px #ffd76636;
}

.cell.end.tail {
  border-color: #c9a355;
  box-shadow:
    0 0 0 1px #e0c07580 inset,
    0 0 18px #ffd76660;
}

.cell.tail {
  border-color: #4f88a1;
  box-shadow:
    0 0 0 1px #6ea7bf75 inset,
    0 0 12px #5ec7ff36;
  animation: tail-pulse 2.2s ease-in-out infinite;
}

.cell.tail .trace-core {
  background: radial-gradient(circle at 32% 26%, #ffffff, #6bcbff 70%);
  box-shadow:
    0 0 0 2px #73c8ff8a inset,
    0 0 22px #6bccffbf;
}

.cell.next-option {
  border-color: #2f6075;
  box-shadow: none;
}

.cell.next-option .trace::before {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
  border-color: #62b9d4;
  box-shadow:
    0 0 0 1px #9de0f838 inset,
    0 0 9px #62bdd957;
  animation: option-spark 2.2s ease-in-out infinite;
}

.cell.next-option .trace-core {
  opacity: 0.94;
  transform: translate(-50%, -50%) scale(0.98);
  background: radial-gradient(circle at 32% 26%, #f0fbff, #7eb8d0 72%);
  box-shadow:
    0 0 0 2px #8cc6dc72 inset,
    0 0 11px #79bfdc66;
}

.cell.hint-target {
  border-color: #d39a41;
  box-shadow:
    0 0 0 1px #ffce7d80 inset,
    0 0 14px #ffbf5a61;
  animation: hint-node-pulse 1.7s ease-in-out infinite;
}

.cell.hint-target .trace::before {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.08);
  border-color: #ffbc54;
  box-shadow:
    0 0 0 1px #ffd58b78 inset,
    0 0 12px #ffc05f8f;
}

.cell.hint-target .trace-core {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1.06);
  background: radial-gradient(circle at 32% 26%, #fffaf0, #ffb34d 74%);
  box-shadow:
    0 0 0 2px #f6bb608a inset,
    0 0 13px #ffb84d99;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 8;
  display: grid;
  place-items: center;
  padding: 20px;
  background: #020d13a6;
  backdrop-filter: blur(3px);
}

.modal.hidden {
  display: none;
}

.modal-card {
  width: min(460px, 100%);
  border: 1px solid #3c7f96;
  border-radius: 18px;
  padding: 18px;
  background:
    linear-gradient(150deg, #1d4255ee, #132d3dee),
    var(--surface-1);
  box-shadow: 0 24px 52px #0000006b;
}

.modal-card h2 {
  margin: 0 0 7px;
  font-family: var(--display-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.modal-card p {
  margin: 0 0 15px;
  color: var(--text-soft);
}

.level-select-modal {
  z-index: 10;
}

.level-select-card {
  width: min(980px, 100%);
  max-height: min(86vh, 900px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.level-select-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.level-select-head h2 {
  margin: 0;
}

.level-select-head button {
  min-height: 38px;
}

.level-select-summary {
  margin: 0;
  font-size: 0.84rem;
  color: #bfdae8;
}

.level-select-filters {
  display: grid;
  grid-template-columns: minmax(220px, 2fr) 1fr 1fr;
  gap: 8px;
}

.level-select-filters input,
.level-select-filters select {
  min-width: 0;
  min-height: 38px;
  border: 1px solid #3a7489;
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
  font-size: 0.85rem;
  color: #dff1fb;
  background: linear-gradient(145deg, #152f3f, #112734);
}

.level-select-filters select {
  appearance: none;
}

.level-select-filters input:focus,
.level-select-filters select:focus {
  outline: 2px solid #6fd2ff80;
  outline-offset: 1px;
}

.level-select-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(164px, 1fr));
  gap: 8px;
  overflow: auto;
  padding-right: 4px;
  max-height: min(60vh, 620px);
}

.level-select-item {
  min-height: 86px;
  padding: 10px 11px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  text-align: left;
  text-transform: none;
  letter-spacing: 0.02em;
  font-size: 0.82rem;
}

.level-select-index {
  font-size: 0.69rem;
  color: #98bfd2;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.level-select-name {
  font-family: var(--display-font);
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: #ebf8ff;
}

.level-select-meta {
  font-size: 0.72rem;
  color: #a9c3d1;
}

.level-select-item.active {
  border-color: #79d2ff;
  box-shadow:
    0 0 0 1px #83dbff8f inset,
    0 0 12px #70cfff5e;
}

.level-select-item.solved {
  border-color: #2fb28d;
  background: linear-gradient(145deg, #1e8570, #145d4f);
}

.level-select-item.locked {
  border-style: dashed;
  filter: saturate(0.68);
}

.level-select-item.locked .level-select-name,
.level-select-item.locked .level-select-index,
.level-select-item.locked .level-select-meta {
  color: #9fb5c1;
}

.level-select-empty {
  margin: 0;
  border: 1px dashed #487388;
  border-radius: 12px;
  padding: 16px;
  color: #b1c8d4;
  font-size: 0.86rem;
}

@keyframes board-shake {
  0% {
    transform: translateX(0);
  }
  30% {
    transform: translateX(-6px);
  }
  60% {
    transform: translateX(5px);
  }
  100% {
    transform: translateX(0);
  }
}

@keyframes blur-float {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(16px);
  }
}

@keyframes shell-in {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.995);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes title-hum {
  0% {
    text-shadow:
      0 0 0 #000,
      0 0 20px #75d8ff33,
      0 0 30px #28d6a622;
  }
  50% {
    text-shadow:
      0 0 0 #000,
      0 0 24px #7fddff5a,
      0 0 34px #1ed6a53a;
  }
  100% {
    text-shadow:
      0 0 0 #000,
      0 0 20px #75d8ff33,
      0 0 30px #28d6a622;
  }
}

@keyframes cta-pulse {
  0% {
    box-shadow: 0 0 12px #1ed6a53a;
  }
  50% {
    box-shadow: 0 0 24px #1ed6a56b;
  }
  100% {
    box-shadow: 0 0 12px #1ed6a53a;
  }
}

@keyframes signal-sweep {
  0% {
    transform: translateX(-20%) translateY(0);
  }
  100% {
    transform: translateX(20%) translateY(0);
  }
}

@keyframes corner-glint {
  0% {
    opacity: 0.4;
  }
  50% {
    opacity: 0.95;
  }
  100% {
    opacity: 0.4;
  }
}

@keyframes tail-pulse {
  0% {
    box-shadow:
      0 0 0 1px #6ea7bf75 inset,
      0 0 10px #5ec7ff2f;
  }
  50% {
    box-shadow:
      0 0 0 1px #84bdd5a3 inset,
      0 0 18px #74d0ff69;
  }
  100% {
    box-shadow:
      0 0 0 1px #6ea7bf75 inset,
      0 0 10px #5ec7ff2f;
  }
}

@keyframes option-spark {
  0% {
    opacity: 0.65;
    transform: translate(-50%, -50%) scale(0.9);
    box-shadow:
      0 0 0 1px #5aaec954 inset,
      0 0 6px #68bfd941;
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.05);
    box-shadow:
      0 0 0 1px #8fd9f2a3 inset,
      0 0 14px #7fd3ec82;
  }
  100% {
    opacity: 0.65;
    transform: translate(-50%, -50%) scale(0.9);
    box-shadow:
      0 0 0 1px #5aaec954 inset,
      0 0 6px #68bfd941;
  }
}

@keyframes hint-node-pulse {
  0% {
    box-shadow:
      0 0 0 1px #ffce7d65 inset,
      0 0 10px #ffbf5a4f;
  }
  50% {
    box-shadow:
      0 0 0 1px #ffd58e9a inset,
      0 0 18px #ffca6f94;
  }
  100% {
    box-shadow:
      0 0 0 1px #ffce7d65 inset,
      0 0 10px #ffbf5a4f;
  }
}

@keyframes board-penalty-rise {
  0% {
    opacity: 0;
    transform: translate(-50%, -26%) scale(0.86);
  }
  20% {
    opacity: 1;
    transform: translate(-50%, -46%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -145%) scale(1.05);
  }
}

.match-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* ── Daily Challenge ── */

.daily-challenge-panel {
  border: 1px solid #1a3040;
  background: linear-gradient(135deg, #0d1820 0%, #111c26 100%);
}

.daily-date-label {
  font-size: 0.82rem;
  color: var(--text-dim, #5a6a7a);
  text-transform: capitalize;
}

.daily-play-btn {
  margin-top: 4px;
  min-height: 48px;
  font-size: 1rem;
}

.daily-leaderboard {
  margin-top: 16px;
}

.daily-leaderboard h3 {
  margin: 0 0 8px;
  font-family: var(--display-font);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #d7ecf8;
}

.daily-streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  color: #ffd580;
  background: rgba(255, 170, 40, 0.1);
  border: 1px solid rgba(255, 170, 40, 0.25);
}

.daily-streak-fire {
  font-size: 1rem;
}

.daily-leaderboard-empty {
  font-size: 0.8rem;
  color: #7f9ba9;
  font-style: italic;
  margin: 0;
}

.daily-result-card {
  margin-top: 12px;
  padding: 16px;
  border-radius: 12px;
  background: #141c24;
  border: 1px solid #1e2a35;
}

.daily-result-header {
  font-size: 0.9rem;
  font-weight: 700;
  color: #8aafcc;
  margin-bottom: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.daily-result-stats {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.daily-result-stats .mini-stat {
  flex: 1;
  text-align: center;
}

.daily-result-actions {
  display: flex;
  gap: 8px;
}

.daily-result-actions button {
  flex: 1;
}

.daily-share-preview {
  margin-top: 12px;
  width: 100%;
  border-radius: 8px;
}

.match-description {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-soft);
}

.match-setup {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.match-setup-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 8px;
}

.match-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #97b4c5;
}

.match-setup-row input,
.match-setup-row select {
  min-width: 0;
  min-height: 38px;
  border: 1px solid #3a7489;
  border-radius: 10px;
  padding: 8px 10px;
  font: inherit;
  font-size: 0.85rem;
  color: #dff1fb;
  background: linear-gradient(145deg, #152f3f, #112734);
  appearance: none;
}

.match-setup-row input:focus,
.match-setup-row select:focus {
  outline: 2px solid #6fd2ff80;
  outline-offset: 1px;
}

.match-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}

.match-actions button {
  min-height: 42px;
  font-size: 0.78rem;
}

.match-share-row {
  margin-top: 6px;
}

.match-share-row button {
  width: 100%;
}

.match-share-hint {
  margin: 4px 0 0;
  font-size: 0.74rem;
  color: var(--text-dim);
  line-height: 1.35;
}

/* ── Phase-based multiplayer panels ── */

.match-phase[hidden] {
  display: none !important;
}

.match-phase-header {
  margin-bottom: 4px;
}

.match-phase-header h2 {
  margin-bottom: 2px;
}

.match-progress-label {
  margin: 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--cyan);
}

.match-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 6px 0;
  color: #7f9ba9;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.match-divider::before,
.match-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: #355f72;
}

.match-import-trigger {
  width: 100%;
  min-height: 42px;
  border: 1px dashed #3f7488;
  border-radius: 10px;
  padding: 10px 14px;
  font: inherit;
  font-size: 0.8rem;
  color: #97b4c5;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.match-import-trigger:hover {
  border-color: #6fd2ff;
  color: #dff1fb;
}

.match-share-btn {
  width: 100%;
  min-height: 48px;
  font-size: 0.9rem;
}

.match-share-confirm {
  margin: 6px 0 0;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #d3ffe9;
  background: rgba(30, 214, 165, 0.12);
  border: 1px solid rgba(30, 214, 165, 0.3);
  text-align: center;
}

.match-secondary-btn {
  width: 100%;
  min-height: 38px;
  margin-top: 4px;
  border: 1px solid #3f7488;
  border-radius: 10px;
  padding: 8px 14px;
  font: inherit;
  font-size: 0.78rem;
  color: #97b4c5;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.match-secondary-btn:hover {
  border-color: #6fd2ff;
  color: #dff1fb;
}

.match-abort-btn {
  width: 100%;
  min-height: 34px;
  margin-top: 4px;
  border: 1px solid #5a3a3a;
  border-radius: 10px;
  padding: 6px 14px;
  font: inherit;
  font-size: 0.72rem;
  color: #b08080;
  background: transparent;
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.match-abort-btn:hover {
  border-color: #b84e54;
  color: #ffdfe1;
}

.match-standings h3 {
  margin: 8px 0 4px;
  font-family: var(--display-font);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #d7ecf8;
}

.match-standings-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.match-standing-row {
  border: 1px solid #355f72;
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(145deg, #1737478f, #1128388f);
}

.match-standing-row.is-you {
  border-color: #6fd2ff;
  background: linear-gradient(145deg, #1e4a5e8f, #15374a8f);
}

.match-standing-rank {
  font-family: var(--display-font);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--cyan);
  min-width: 32px;
}

.match-standing-info {
  flex: 1;
  min-width: 0;
}

.match-standing-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: #dbf2ff;
}

.match-standing-details {
  margin-top: 2px;
  font-size: 0.7rem;
  color: #a9c2d1;
}

.match-standing-score {
  font-family: var(--display-font);
  font-size: 1rem;
  font-weight: 700;
  color: #ecf8ff;
  white-space: nowrap;
}

.match-level-comparison {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 400px;
  overflow: auto;
  padding-right: 2px;
}

.match-level-row {
  border: 1px solid #2f5467;
  border-radius: 10px;
  padding: 8px 10px;
  background: linear-gradient(145deg, #1737478f, #1128388f);
}

.match-level-header {
  font-size: 0.74rem;
  font-weight: 700;
  color: #d6eefb;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}

.match-level-players {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.match-level-entry {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 6px;
  border-radius: 6px;
  font-size: 0.72rem;
  color: #a9c2d1;
}

.match-level-entry.match-level-winner {
  color: var(--success);
  font-weight: 700;
  background: rgba(30, 214, 165, 0.08);
}

.match-entry-name {
  font-weight: 700;
  min-width: 50px;
}

.match-entry-stats {
  font-variant-numeric: tabular-nums;
}

.match-level-entry.match-level-pending {
  color: #7f9ba9;
  font-style: italic;
}

.match-import-card {
  width: min(520px, 100%);
}

.match-import-textarea {
  width: 100%;
  min-height: 120px;
  border: 1px solid #3a7489;
  border-radius: 10px;
  padding: 10px;
  font-family: monospace;
  font-size: 0.78rem;
  color: #dff1fb;
  background: linear-gradient(145deg, #152f3f, #112734);
  resize: vertical;
  margin-bottom: 10px;
}

.match-import-textarea:focus {
  outline: 2px solid #6fd2ff80;
  outline-offset: 1px;
}

.countdown-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  background: rgba(8, 20, 27, 0.82);
  backdrop-filter: blur(4px);
  border-radius: 16px;
}

.countdown-overlay[hidden],
.countdown-overlay > [hidden] {
  display: none;
}

.ready-btn {
  border: 2px solid var(--cyan);
  border-radius: 16px;
  padding: 20px 48px;
  font-family: var(--display-font);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #fff;
  background: linear-gradient(145deg, rgba(107, 203, 255, 0.15), rgba(47, 96, 117, 0.1));
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  text-shadow: 0 0 24px var(--cyan);
  box-shadow: 0 0 30px rgba(107, 203, 255, 0.2);
  animation: ready-pulse 2s ease-in-out infinite;
}

.ready-btn:hover {
  transform: scale(1.06);
  border-color: #fff;
  box-shadow: 0 0 40px rgba(107, 203, 255, 0.4);
}

.ready-btn:active {
  transform: scale(0.97);
}

@keyframes ready-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(107, 203, 255, 0.2); }
  50% { box-shadow: 0 0 40px rgba(107, 203, 255, 0.35); }
}

.countdown-number {
  font-family: var(--display-font);
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 40px var(--cyan), 0 0 80px rgba(107, 203, 255, 0.3);
  animation: countdown-pop 0.6s cubic-bezier(0.22, 0.96, 0.16, 1) both;
}

.countdown-number.go {
  color: var(--mint);
  text-shadow: 0 0 40px var(--mint), 0 0 80px rgba(30, 214, 165, 0.4);
}

@keyframes countdown-pop {
  0% {
    opacity: 0;
    transform: scale(2.2);
  }
  40% {
    opacity: 1;
    transform: scale(0.95);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

.opponent-delta {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 5;
  transform: translate(-50%, -50%);
  padding: 10px 22px;
  border-radius: 14px;
  font-family: var(--display-font);
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  pointer-events: none;
  animation: delta-show 2s cubic-bezier(0.22, 0.96, 0.16, 1) forwards;
}

.opponent-delta.ahead {
  color: #d3ffe9;
  background: linear-gradient(145deg, rgba(30, 214, 165, 0.25), rgba(16, 151, 120, 0.2));
  border: 1px solid rgba(30, 214, 165, 0.4);
  text-shadow: 0 0 16px rgba(30, 214, 165, 0.5);
}

.opponent-delta.behind {
  color: #ffdfe1;
  background: linear-gradient(145deg, rgba(255, 122, 122, 0.2), rgba(184, 78, 84, 0.15));
  border: 1px solid rgba(255, 122, 122, 0.35);
  text-shadow: 0 0 16px rgba(255, 122, 122, 0.4);
}

.opponent-delta.tied {
  color: #e8fbff;
  background: linear-gradient(145deg, rgba(107, 203, 255, 0.2), rgba(47, 96, 117, 0.15));
  border: 1px solid rgba(107, 203, 255, 0.35);
}

@keyframes delta-show {
  0% {
    opacity: 0;
    transform: translate(-50%, -40%) scale(0.8);
  }
  15% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.05);
  }
  30% {
    transform: translate(-50%, -50%) scale(1);
  }
  80% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -60%) scale(0.95);
  }
}

.win-modal-card {
  width: min(520px, 100%);
}

/* ── Win split table ── */

.win-split-table {
  margin: 10px 0;
  max-height: 240px;
  overflow-y: auto;
}

.win-split-table[hidden] {
  display: none;
}

.win-splits {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

.win-splits th {
  padding: 4px 8px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #7f9ba9;
  text-align: left;
  border-bottom: 1px solid #355f72;
}

.win-splits td {
  padding: 5px 8px;
  color: #b6ccda;
  border-bottom: 1px solid #1e3a4a;
}

.win-splits tbody tr:last-child td {
  border-bottom: 1px solid #355f72;
}

.win-split-current {
  background: rgba(107, 203, 255, 0.08);
}

.win-split-current td {
  color: #dff1fb;
  font-weight: 600;
}

.win-split-index {
  color: #7f9ba9;
  font-weight: 700;
  width: 28px;
}

.win-split-opponent {
  color: #7f9ba9;
}

.win-split-vs {
  font-weight: 700;
  text-align: right;
}

.win-split-ahead {
  color: #5eeabb;
}

.win-split-behind {
  color: #ff9a9a;
}

.win-split-tied {
  color: #8ad4f8;
}

.win-split-total td {
  padding: 6px 8px;
  font-weight: 700;
  color: #dff1fb;
  border-bottom: none;
}

.win-split-hru {
  color: #8aafcc;
  font-size: 0.85em;
  text-align: center;
  white-space: nowrap;
}

.modal-export-btn,
.modal-share-daily-btn {
  width: 100%;
  margin-top: 10px;
}

.modal-export-confirm {
  margin: 6px 0 0;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--success);
  text-align: center;
}

.match-import-error {
  margin: 6px 0 8px;
  padding: 8px 10px;
  border: 1px solid #b84e54;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: #ffdfe1;
  background: linear-gradient(130deg, #4d1f28c7, #2f161bc7);
}

@keyframes board-lost-pulse {
  0% {
    box-shadow: 0 0 22px 4px rgba(184, 78, 84, 0.35);
  }
  50% {
    box-shadow: 0 0 34px 8px rgba(210, 65, 75, 0.55);
  }
  100% {
    box-shadow: 0 0 22px 4px rgba(184, 78, 84, 0.35);
  }
}

/* ══════════════════════════════════════════════
   Mode themes — visual distinction between
   single-player (cyan/blue) and multiplayer (amber/warm)
   ══════════════════════════════════════════════ */

.app-shell[data-mode="challenge"] {
  --mode-accent: #ffb84d;
  --mode-accent-dim: #b8843a;
  --mode-accent-glow: rgba(255, 184, 77, 0.25);
  --mode-border: #7a5a2e;
  --mode-surface: #2a2218;
}

.app-shell[data-mode="campaign"] {
  --mode-accent: #6bcbff;
  --mode-accent-dim: #4a8fad;
  --mode-accent-glow: rgba(107, 203, 255, 0.2);
  --mode-border: #3a748c;
  --mode-surface: #142a38;
}

/* Board-stage border and glow */
.app-shell[data-mode="challenge"] .board-stage {
  border-color: var(--mode-border);
  background:
    linear-gradient(145deg, #2a220e96, #1a150a96),
    var(--surface-1);
  box-shadow: inset 0 0 30px rgba(255, 184, 77, 0.04);
}

.app-shell[data-mode="challenge"] .board-stage::after {
  background: linear-gradient(115deg, #ffffff00 42%, #ffc85a14 50%, #ffffff00 58%);
}

/* Stage corners */
.app-shell[data-mode="challenge"] .stage-corners span {
  border-color: var(--mode-accent-dim);
}

/* Eyebrow mode label */
.app-shell[data-mode="challenge"] .board-head .eyebrow {
  color: var(--mode-accent);
}

.app-shell[data-mode="campaign"] .board-head .eyebrow {
  color: var(--mode-accent-dim);
}

/* Live stats accent */
.app-shell[data-mode="challenge"] .live-stat {
  border-color: var(--mode-border);
  color: #f0d5a8;
}

/* Level name color */
.app-shell[data-mode="challenge"] .board-head h2 {
  color: #ffe8c4;
}

/* Ambient blur shift — toggled via JS class on body */
body.mode-challenge .blur-a {
  background: #ffb84d;
  transition: background 0.6s ease;
}

body.mode-challenge .blur-b {
  background: #ff8a3a;
  transition: background 0.6s ease;
}

body:not(.mode-challenge) .blur-a,
body:not(.mode-challenge) .blur-b {
  transition: background 0.6s ease;
}

/* Hub menu active button in multiplayer */
.app-shell[data-mode="challenge"] .hub-menu button.active {
  border-color: var(--mode-accent);
  color: var(--mode-accent);
  box-shadow:
    0 0 0 1px rgba(255, 184, 77, 0.3) inset,
    0 0 10px rgba(255, 184, 77, 0.15);
}

/* Challenge pills in multiplayer */
.app-shell[data-mode="challenge"] .challenge-pill.active {
  border-color: var(--mode-accent);
  box-shadow:
    0 0 0 1px rgba(255, 184, 77, 0.35) inset,
    0 0 10px rgba(255, 184, 77, 0.2);
}

/* Ready button in multiplayer */
.app-shell[data-mode="challenge"] .ready-btn {
  border-color: var(--mode-accent);
  text-shadow: 0 0 24px var(--mode-accent);
  box-shadow: 0 0 30px var(--mode-accent-glow);
  background: linear-gradient(145deg, rgba(255, 184, 77, 0.12), rgba(180, 120, 40, 0.08));
}

.app-shell[data-mode="challenge"] .ready-btn:hover {
  border-color: #ffe0a0;
  box-shadow: 0 0 40px rgba(255, 184, 77, 0.35);
}

/* Countdown numbers in multiplayer */
.app-shell[data-mode="challenge"] .countdown-number {
  text-shadow: 0 0 40px var(--mode-accent), 0 0 80px rgba(255, 184, 77, 0.3);
}

.app-shell[data-mode="challenge"] .countdown-number.go {
  color: var(--mode-accent);
  text-shadow: 0 0 40px var(--mode-accent), 0 0 80px rgba(255, 184, 77, 0.4);
}

/* Primary buttons in multiplayer panels */
.app-shell[data-mode="challenge"] .match-panel button.primary,
.app-shell[data-mode="challenge"] .match-share-btn {
  background: linear-gradient(145deg, #b87820, #8a5a18);
  border-color: #d49430;
}

.app-shell[data-mode="challenge"] .match-panel button.primary:hover,
.app-shell[data-mode="challenge"] .match-share-btn:hover {
  background: linear-gradient(145deg, #d49430, #a06c20);
}

/* Progress label */
.app-shell[data-mode="challenge"] .match-progress-label {
  color: var(--mode-accent);
}

@media (max-width: 1040px) {
  .app-shell {
    grid-template-columns: 1fr;
    width: min(920px, 94vw);
  }

  /* Board first in portrait / tablet */
  .board-panel {
    order: 1;
  }

  .sidebar {
    order: 2;
  }

  /* Hide secondary stats on tablet to reduce clutter */
  .stat-card-secondary {
    display: none;
  }

  .board-help {
    max-width: none;
  }

  .run-stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .run-detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .level-select-card {
    width: min(920px, 100%);
  }
}

/* ══════════════════════════════════════════════
   Mobile tab-bar & slide-up panel (hidden on desktop)
   ══════════════════════════════════════════════ */

.mobile-tab-bar {
  display: none;
}

.mobile-panel-backdrop {
  display: none;
}

.mobile-panel-handle {
  display: none;
}

@media (max-width: 760px) {
  /* ── Body padding for tab-bar ── */
  body {
    padding-bottom: calc(60px + env(safe-area-inset-bottom, 0px));
  }

  /* ── App shell: single column, board first ── */
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    width: 100%;
    margin: 0;
    gap: 0;
  }

  /* ── Board panel: full-screen ── */
  .board-panel {
    padding: 10px;
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    order: 1;
  }

  .board-panel::before {
    display: none;
  }

  .board-stage {
    padding: 10px;
    border-radius: 12px;
  }

  .board {
    --cell-size: clamp(38px, 12vw, 58px);
    gap: 0;
  }

  .board-head {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 8px;
  }

  .board-head h2 {
    font-size: clamp(1rem, 4.5vw, 1.4rem);
  }

  .board-head .eyebrow {
    font-size: 0.6rem;
  }

  .live-stat {
    font-size: 0.74rem;
    padding: 4px 8px;
  }

  /* ── Hide stuff not needed in mobile play view ── */
  .headline {
    display: none;
  }

  /* ── Sidebar → inline panel (replaces board when open) ── */
  .panel.sidebar {
    display: none;
    order: 2;
    padding: 8px 14px 20px;
    border-radius: 0;
    border: none;
    box-shadow: none;
    background: transparent;
    overflow: auto;
    overscroll-behavior: contain;
  }

  .panel.sidebar::before {
    display: none;
  }

  .panel.sidebar.mobile-panel-open {
    display: flex;
    order: 1;
  }

  .panel.sidebar.mobile-panel-open ~ .board-panel {
    display: none;
  }

  /* ── Drag handle: hide when inline ── */
  .mobile-panel-handle {
    display: none;
  }

  /* ── Backdrop: not needed for inline panel ── */
  .mobile-panel-backdrop {
    display: none !important;
  }

  /* ── Bottom tab bar ── */
  .mobile-tab-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 21;
    height: 60px;
    background: linear-gradient(180deg, #0d1f2af5, #081319f5);
    border-top: 1px solid #2b5a6d;
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  .mobile-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    border: none;
    background: none;
    color: #7f9ba9;
    font-family: var(--ui-font);
    font-size: 0.62rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    cursor: pointer;
    transition: color 0.15s;
    -webkit-tap-highlight-color: transparent;
  }

  .mobile-tab svg {
    opacity: 0.7;
    transition: opacity 0.15s;
  }

  .mobile-tab.active {
    color: var(--cyan);
  }

  .mobile-tab.active svg {
    opacity: 1;
  }

  /* Multiplayer mode tab accent */
  .app-shell[data-mode="challenge"] ~ .mobile-tab-bar .mobile-tab.active {
    color: var(--amber);
  }

  /* ── Hub menu in mobile panel ── */
  .hub-menu {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .hub-menu button {
    min-height: 38px;
    font-size: 0.72rem;
    padding: 7px 6px;
  }

  /* ── Mobile play controls below board ── */
  .mobile-play-controls {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    margin-top: 10px;
  }

  .mobile-play-controls button {
    min-height: 40px;
    font-size: 0.74rem;
    padding: 8px 10px;
  }

  /* ── Sidebar button-row: keep for menu view ── */
  .button-row {
    gap: 6px;
  }

  .button-row button {
    min-height: 40px;
    font-size: 0.74rem;
    padding: 8px 10px;
  }

  .button-row kbd {
    display: none;
  }

  /* ── Stats/stat cards ── */
  .stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
  }

  .stat-card {
    padding: 6px 8px;
  }

  /* ── Other mobile tweaks ── */
  .achievement-list {
    grid-template-columns: 1fr;
  }

  .hub-mini-grid {
    grid-template-columns: 1fr 1fr;
  }

  .level-list {
    grid-template-columns: repeat(5, 1fr);
  }

  .challenge-totals {
    grid-template-columns: repeat(3, 1fr);
  }

  .challenge-export-row {
    grid-template-columns: 1fr;
  }

  .level-select-card {
    padding: 14px;
    gap: 10px;
  }

  .level-select-head {
    flex-direction: column;
    align-items: stretch;
  }

  .level-select-head button {
    width: 100%;
  }

  .level-select-filters {
    grid-template-columns: 1fr;
  }

  .level-select-grid {
    grid-template-columns: repeat(auto-fill, minmax(132px, 1fr));
    max-height: min(58vh, 540px);
  }

  /* ── Rules section: compact on mobile ── */
  .panel-inset {
    padding: 10px;
  }

  .panel-inset h2 {
    font-size: 0.85rem;
  }

  .panel-inset p {
    font-size: 0.78rem;
  }

  /* ── Status box ── */
  .status-box {
    font-size: 0.78rem;
    padding: 8px 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}