chesscubing/styles.css

:root {
  --bg: #01050b;
  --bg-soft: rgba(2, 12, 20, 0.92);
  --panel: rgba(4, 18, 30, 0.84);
  --panel-border: rgba(98, 242, 255, 0.22);
  --panel-border-soft: rgba(98, 242, 255, 0.1);
  --panel-glow: rgba(56, 213, 255, 0.18);
  --grid-line: rgba(92, 234, 255, 0.09);
  --text: #e4fbff;
  --muted: #7da9b6;
  --warm: #7df7bd;
  --warm-strong: #18d97f;
  --cool: #75f2ff;
  --cool-strong: #1ed6ff;
  --white-seat: #b6ffd8;
  --dark-seat: #8ef6ff;
  --danger: #ff647f;
  --success: #7df7bd;
  --shadow:
    0 0 0 1px rgba(98, 242, 255, 0.08),
    0 26px 80px rgba(0, 0, 0, 0.56),
    0 0 34px rgba(30, 214, 255, 0.08);
  --radius: 28px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(24, 217, 127, 0.18), transparent 22%),
    radial-gradient(circle at 78% 18%, rgba(30, 214, 255, 0.18), transparent 20%),
    radial-gradient(circle at bottom center, rgba(24, 217, 127, 0.1), transparent 26%),
    linear-gradient(180deg, #01040a 0%, #03101b 48%, #041522 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black 0%, black 72%, transparent 100%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 110%, rgba(24, 217, 127, 0.18), transparent 24%),
    linear-gradient(180deg, transparent 0 58%, rgba(30, 214, 255, 0.06) 72%, transparent 100%);
  mix-blend-mode: screen;
}

.ambient {
  position: fixed;
  width: 30rem;
  height: 30rem;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.28;
  pointer-events: none;
}

.ambient-left {
  top: -12rem;
  left: -8rem;
  background: var(--warm-strong);
}

.ambient-right {
  right: -12rem;
  bottom: -9rem;
  background: var(--cool-strong);
}

a {
  color: var(--cool);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.eyebrow,
.micro-label {
  margin: 0 0 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--cool);
  font-size: 0.78rem;
  font-family: "Consolas", "Lucida Console", monospace;
  text-shadow: 0 0 14px rgba(30, 214, 255, 0.22);
}

.micro-label {
  color: var(--warm);
}

h1,
h2,
h3,
strong {
  font-family: "Trebuchet MS", "Segoe UI", sans-serif;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.lead,
.section-copy,
.preview-banner p,
.rule-card p,
.phase-subtitle,
.zone-foot,
.resume-card,
.setup-summary,
.modal-card p {
  color: var(--muted);
}

.button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 18px;
  padding: 0.95rem 1.15rem;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    transform 160ms ease,
    filter 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease;
  color: var(--text);
  text-decoration: none;
}

.button:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
}

.button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.button.primary {
  background:
    linear-gradient(135deg, rgba(30, 214, 255, 0.22), rgba(7, 32, 44, 0.96)),
    linear-gradient(135deg, var(--cool-strong), var(--cool));
  border-color: rgba(117, 242, 255, 0.5);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.06),
    0 0 24px rgba(30, 214, 255, 0.16);
}

.button.secondary {
  background: linear-gradient(135deg, rgba(24, 217, 127, 0.18), rgba(125, 247, 189, 0.08));
  border-color: rgba(125, 247, 189, 0.32);
  box-shadow: 0 0 18px rgba(24, 217, 127, 0.1);
}

.button.ghost {
  background: linear-gradient(180deg, rgba(6, 20, 31, 0.92), rgba(3, 11, 18, 0.92));
  border-color: var(--panel-border-soft);
  box-shadow: inset 0 0 0 1px rgba(30, 214, 255, 0.04);
}

.button.danger {
  color: #ffd8d8;
  border-color: rgba(255, 114, 114, 0.3);
}

.button.small {
  padding: 0.7rem 0.9rem;
}

.setup-shell {
  position: relative;
  width: min(1220px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.2rem 0 2rem;
}

.hero,
.panel {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--panel-border);
  border-radius: calc(var(--radius) + 4px);
  background:
    linear-gradient(180deg, rgba(7, 24, 39, 0.92), rgba(3, 11, 18, 0.94)),
    var(--panel);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.hero::before,
.panel::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cool), transparent);
  opacity: 0.55;
  pointer-events: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, 0.9fr);
  gap: 1.2rem;
  padding: 1.3rem;
}

.hero-copy,
.hero-preview {
  padding: 1rem;
}

.hero-preview {
  display: grid;
  gap: 1rem;
}

.hero-setup h1 {
  margin: 0;
  font-size: clamp(2.7rem, 6.5vw, 4.9rem);
  line-height: 0.95;
  letter-spacing: 0.03em;
  text-shadow:
    0 0 12px rgba(30, 214, 255, 0.18),
    0 0 28px rgba(30, 214, 255, 0.08);
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.2rem;
}

.hero-pills span,
.mini-chip,
.seat-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  border: 1px solid var(--panel-border-soft);
  background: linear-gradient(180deg, rgba(7, 26, 40, 0.88), rgba(2, 13, 22, 0.92));
  box-shadow: inset 0 0 0 1px rgba(30, 214, 255, 0.03);
}

.preview-card,
.preview-banner,
.rule-card,
.resume-card,
.setup-summary,
.status-card,
.spine-card,
.modal-card,
.zone-inner {
  border-radius: 24px;
  border: 1px solid var(--panel-border-soft);
  background:
    linear-gradient(160deg, rgba(10, 31, 47, 0.96), rgba(3, 13, 21, 0.96));
  box-shadow:
    inset 0 0 0 1px rgba(30, 214, 255, 0.03),
    0 0 22px rgba(30, 214, 255, 0.04);
}

.preview-card,
.preview-banner,
.rule-card,
.resume-card,
.setup-summary,
.status-card,
.spine-card,
.modal-card {
  padding: 1rem;
}

.phase-list {
  margin: 0.8rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.phase-list li + li {
  margin-top: 0.45rem;
}

.setup-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.82fr);
  gap: 1.2rem;
  margin-top: 1.2rem;
}

.panel {
  padding: 1.35rem;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.1rem;
}

.setup-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.timing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.span-2 {
  grid-column: 1 / -1;
}

.field > span,
legend {
  font-weight: 700;
}

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
}

input,
textarea {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  border: 1px solid var(--panel-border-soft);
  background:
    linear-gradient(180deg, rgba(3, 14, 23, 0.96), rgba(2, 10, 16, 0.96));
  box-shadow: inset 0 0 0 1px rgba(30, 214, 255, 0.03);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
  min-height: 6rem;
}

input:focus,
textarea:focus {
  outline: 2px solid rgba(30, 214, 255, 0.45);
  outline-offset: 1px;
}

.option-grid {
  display: grid;
  gap: 0.85rem;
}

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

.preset-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.option-card {
  position: relative;
  display: grid;
  gap: 0.45rem;
  min-height: 8.7rem;
  padding: 1rem 1rem 1rem 3rem;
  border-radius: 22px;
  border: 1px solid var(--panel-border-soft);
  background:
    linear-gradient(160deg, rgba(7, 25, 39, 0.96), rgba(2, 10, 17, 0.96));
  cursor: pointer;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    box-shadow 160ms ease;
}

.option-card:hover {
  transform: translateY(-3px);
  border-color: rgba(30, 214, 255, 0.34);
  box-shadow: 0 0 20px rgba(30, 214, 255, 0.08);
}

.option-card input {
  position: absolute;
  top: 1.1rem;
  left: 1rem;
  width: 1.1rem;
  height: 1.1rem;
}

.option-card:has(input:checked) {
  border-color: rgba(30, 214, 255, 0.52);
  background:
    linear-gradient(160deg, rgba(30, 214, 255, 0.16), rgba(24, 217, 127, 0.09));
  box-shadow:
    inset 0 0 0 1px rgba(30, 214, 255, 0.06),
    0 0 24px rgba(30, 214, 255, 0.08);
}

.setup-summary {
  display: grid;
  gap: 0.38rem;
}

.setup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.side-panel {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.resume-card.empty {
  text-align: center;
}

.resume-card strong {
  display: block;
  margin-bottom: 0.35rem;
}

.resume-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.95rem;
}

.rules-stack {
  display: grid;
  gap: 0.95rem;
}

.phase-body {
  min-height: 100dvh;
  overflow: hidden;
}

.phase-shell {
  position: relative;
  width: min(1400px, calc(100% - 1.2rem));
  min-height: 100dvh;
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 0.8rem 0 0.9rem;
}

.phase-header {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.8rem;
  align-items: center;
}

.brand-link {
  justify-self: start;
  padding: 0.75rem 1rem;
  border-radius: 18px;
  border: 1px solid var(--panel-border-soft);
  background: linear-gradient(180deg, rgba(8, 28, 43, 0.92), rgba(3, 11, 18, 0.92));
  color: var(--text);
  box-shadow: inset 0 0 0 1px rgba(30, 214, 255, 0.03);
}

.brand-link:hover {
  text-decoration: none;
}

.phase-title {
  text-align: center;
}

.phase-title h1 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3rem);
  text-shadow:
    0 0 12px rgba(30, 214, 255, 0.16),
    0 0 24px rgba(30, 214, 255, 0.06);
}

.phase-subtitle {
  margin: 0.25rem 0 0;
}

.utility-button {
  justify-self: end;
}

.status-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.8rem;
}

.status-card {
  min-height: 6.4rem;
  display: grid;
  align-content: center;
  gap: 0.28rem;
  text-align: center;
}

.status-card span {
  color: var(--muted);
}

.status-card strong {
  font-size: clamp(1.6rem, 3.8vw, 2.7rem);
  line-height: 0.94;
}

.status-card.wide {
  background:
    linear-gradient(160deg, rgba(30, 214, 255, 0.14), rgba(24, 217, 127, 0.09));
  border-color: rgba(30, 214, 255, 0.22);
}

.faceoff-board {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 340px) minmax(0, 1fr);
  gap: 0.8rem;
  min-height: 0;
}

.player-zone {
  min-height: 0;
}

.zone-inner {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 0.9rem;
  height: 100%;
  padding: 1rem;
}

.zone-head {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  align-items: flex-start;
}

.zone-head h2 {
  margin: 0.2rem 0 0;
  font-size: clamp(1.45rem, 3vw, 2.4rem);
}

.zone-stats {
  text-align: right;
  display: grid;
  gap: 0.2rem;
  color: var(--muted);
}

.zone-stats strong {
  font-size: 1.4rem;
  color: var(--text);
}

.seat-tag {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.light-seat {
  background: rgba(125, 247, 189, 0.12);
  color: var(--white-seat);
  box-shadow: 0 0 16px rgba(24, 217, 127, 0.12);
}

.dark-seat {
  background: rgba(117, 242, 255, 0.12);
  color: var(--dark-seat);
  box-shadow: 0 0 16px rgba(30, 214, 255, 0.12);
}

.zone-button {
  width: 100%;
  min-height: clamp(220px, 44vh, 560px);
  padding: 1rem;
  border-radius: 28px;
  border: 1px solid currentColor;
  font: inherit;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.02;
  font-size: clamp(2.1rem, 5vw, 4.5rem);
  cursor: pointer;
  color: var(--text);
  transition:
    transform 150ms ease,
    filter 150ms ease,
    opacity 150ms ease,
    box-shadow 150ms ease;
  touch-action: manipulation;
  text-shadow: 0 0 18px rgba(255, 255, 255, 0.05);
}

.zone-button:hover {
  transform: translateY(-2px);
  filter: brightness(1.04);
}

.zone-button:disabled {
  cursor: not-allowed;
  transform: none;
  opacity: 0.52;
}

.light-button {
  background:
    linear-gradient(165deg, rgba(24, 217, 127, 0.24), rgba(125, 247, 189, 0.08)),
    linear-gradient(180deg, rgba(11, 19, 24, 0.96), rgba(5, 10, 14, 0.98));
  color: var(--white-seat);
  box-shadow:
    inset 0 0 0 1px rgba(125, 247, 189, 0.08),
    0 0 28px rgba(24, 217, 127, 0.08);
}

.dark-button {
  background:
    linear-gradient(165deg, rgba(30, 214, 255, 0.2), rgba(117, 242, 255, 0.08)),
    linear-gradient(180deg, rgba(11, 19, 24, 0.96), rgba(5, 10, 14, 0.98));
  color: var(--dark-seat);
  box-shadow:
    inset 0 0 0 1px rgba(117, 242, 255, 0.08),
    0 0 28px rgba(30, 214, 255, 0.08);
}

.zone-button.active-turn {
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 0 40px rgba(30, 214, 255, 0.18);
  animation: pulse 1.6s ease-in-out infinite;
}

.active-zone .zone-inner {
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.07);
}

.zone-foot {
  min-height: 3.4rem;
  margin: 0;
}

.phase-spine {
  display: grid;
  align-content: center;
  gap: 0.8rem;
}

.spine-card {
  display: grid;
  gap: 0.35rem;
}

.spine-card strong {
  font-size: clamp(1.45rem, 3vw, 2.2rem);
}

.spine-card p {
  margin-bottom: 0;
}

.spine-button {
  min-height: 4.4rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1rem;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 8, 14, 0.72);
  backdrop-filter: blur(6px);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
  background:
    linear-gradient(180deg, rgba(8, 25, 39, 0.98), rgba(2, 9, 16, 0.98));
  box-shadow: var(--shadow);
}

.modal-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 0.8rem;
}

.modal-head h2 {
  margin-bottom: 0;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.rules-shell {
  position: relative;
  width: min(1220px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.2rem 0 2rem;
}

.hero-rules h1 {
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 4.7rem);
  line-height: 0.94;
  text-shadow:
    0 0 12px rgba(30, 214, 255, 0.18),
    0 0 30px rgba(30, 214, 255, 0.08);
}

.hero-home h1 {
  margin: 0;
  font-size: clamp(2.9rem, 6.4vw, 5.2rem);
  line-height: 0.93;
  text-shadow:
    0 0 12px rgba(30, 214, 255, 0.18),
    0 0 32px rgba(24, 217, 127, 0.08);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.2rem;
}

.rule-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.metric-chip,
.stage-card,
.format-card,
.split-card,
.source-card {
  position: relative;
  border-radius: 24px;
  border: 1px solid var(--panel-border-soft);
  background:
    linear-gradient(160deg, rgba(10, 31, 47, 0.96), rgba(3, 13, 21, 0.96));
  box-shadow:
    inset 0 0 0 1px rgba(30, 214, 255, 0.03),
    0 0 22px rgba(30, 214, 255, 0.04);
}

.metric-chip,
.stage-card,
.format-card,
.split-card,
.source-card {
  padding: 1rem;
}

.metric-chip {
  display: grid;
  gap: 0.3rem;
}

.metric-chip span,
.stage-card p,
.format-head p,
.source-card p,
.split-card p {
  color: var(--muted);
}

.metric-chip strong {
  font-size: 1.2rem;
}

.rules-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1.2rem;
  margin-top: 1.2rem;
}

.panel-wide {
  grid-column: span 12;
}

.panel-half {
  grid-column: span 6;
}

.panel-third {
  grid-column: span 4;
}

.rules-stage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.home-story-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.stage-card {
  display: grid;
  gap: 0.45rem;
}

.rules-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.format-card {
  display: grid;
  gap: 1rem;
  padding-top: 1.15rem;
}

.format-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1rem;
  right: 1rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cool), transparent);
  opacity: 0.7;
}

.mini-panel {
  position: relative;
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
  border-radius: 22px;
  border: 1px solid var(--panel-border-soft);
  background:
    linear-gradient(160deg, rgba(10, 31, 47, 0.96), rgba(3, 13, 21, 0.96));
  box-shadow:
    inset 0 0 0 1px rgba(30, 214, 255, 0.03),
    0 0 22px rgba(30, 214, 255, 0.04);
}

.mini-panel p {
  margin-bottom: 0;
  color: var(--muted);
}

.home-mini-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.home-mini-grid.two-columns {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.cta-panel {
  border-color: rgba(125, 247, 189, 0.24);
}

.twice-card {
  border-color: rgba(117, 242, 255, 0.24);
}

.time-card {
  border-color: rgba(125, 247, 189, 0.24);
}

.format-head h3,
.format-section h4,
.source-card strong {
  margin: 0;
}

.format-head {
  display: grid;
  gap: 0.45rem;
}

.format-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.format-badges span {
  display: inline-flex;
  align-items: center;
  padding: 0.48rem 0.78rem;
  border-radius: 999px;
  border: 1px solid var(--panel-border-soft);
  background: linear-gradient(180deg, rgba(7, 26, 40, 0.88), rgba(2, 13, 22, 0.92));
  color: var(--text);
}

.format-section {
  display: grid;
  gap: 0.6rem;
}

.rule-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--text);
}

.rule-list li + li {
  margin-top: 0.55rem;
}

.rule-list.compact li + li {
  margin-top: 0.42rem;
}

.callout {
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
  border-radius: 22px;
  border: 1px solid rgba(30, 214, 255, 0.18);
  background:
    linear-gradient(145deg, rgba(30, 214, 255, 0.11), rgba(24, 217, 127, 0.08)),
    linear-gradient(180deg, rgba(3, 14, 23, 0.96), rgba(2, 10, 16, 0.96));
}

.callout p {
  margin-bottom: 0;
  color: var(--muted);
}

.split-callouts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.split-card {
  display: grid;
  gap: 0.4rem;
}

.minus-card {
  border-color: rgba(117, 242, 255, 0.22);
}

.plus-card {
  border-color: rgba(125, 247, 189, 0.22);
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
}

.source-card {
  display: grid;
  gap: 0.4rem;
  color: var(--text);
  text-decoration: none;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    box-shadow 160ms ease;
}

.source-card:hover {
  transform: translateY(-3px);
  text-decoration: none;
  border-color: rgba(30, 214, 255, 0.34);
  box-shadow: 0 0 22px rgba(30, 214, 255, 0.08);
}

@keyframes pulse {
  0%,
  100% {
    box-shadow:
      0 0 0 1px rgba(255, 255, 255, 0.08),
      0 0 28px rgba(30, 214, 255, 0.16);
  }

  50% {
    box-shadow:
      0 0 0 1px rgba(255, 255, 255, 0.1),
      0 0 38px rgba(30, 214, 255, 0.24);
  }
}

@media (max-width: 1100px) {
  .hero,
  .setup-grid,
  .mode-grid,
  .preset-grid,
  .timing-grid,
  .faceoff-board,
  .rules-compare,
  .rules-stage-grid,
  .home-story-grid,
  .split-callouts,
  .source-grid,
  .home-mini-grid,
  .home-mini-grid.two-columns {
    grid-template-columns: 1fr;
  }

  .panel-half,
  .panel-third {
    grid-column: span 12;
  }

  .phase-header {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .brand-link,
  .utility-button {
    justify-self: center;
  }
}

@media (max-width: 900px) {
  .phase-body {
    overflow-y: auto;
  }

  .setup-shell,
  .phase-shell,
  .rules-shell {
    width: min(100% - 1rem, 100%);
  }

  .panel,
  .hero {
    padding: 1rem;
  }

  .setup-form {
    grid-template-columns: 1fr;
  }

  .setup-actions,
  .resume-actions,
  .modal-actions {
    display: grid;
  }

  .phase-shell {
    gap: 0.55rem;
    padding: 0.55rem 0 0.55rem;
  }

  .phase-header {
    grid-template-columns: auto 1fr auto;
    gap: 0.45rem;
    text-align: center;
  }

  .phase-title h1 {
    font-size: clamp(1.55rem, 5.8vw, 2.1rem);
  }

  .phase-subtitle {
    font-size: 0.92rem;
  }

  .status-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.45rem;
  }

  .status-card {
    min-height: 4.5rem;
    padding: 0.65rem 0.45rem;
  }

  .status-card strong {
    font-size: clamp(1.25rem, 4vw, 1.7rem);
  }

  .faceoff-board {
    grid-template-rows: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: 0.45rem;
  }

  .rules-grid {
    grid-template-columns: 1fr;
    gap: 0.9rem;
  }

  .opponent-zone .mirrored-mobile {
    transform: rotate(180deg);
  }

  .zone-inner {
    padding: 0.7rem;
    gap: 0.55rem;
  }

  .zone-head {
    align-items: center;
  }

  .zone-head h2 {
    font-size: 1.25rem;
  }

  .zone-stats strong {
    font-size: 1.05rem;
  }

  .zone-button {
    min-height: clamp(118px, 18vh, 180px);
    font-size: clamp(1.7rem, 6.6vw, 2.7rem);
  }

  .zone-foot {
    min-height: 1.3rem;
    font-size: 0.88rem;
  }

  .phase-spine {
    gap: 0.45rem;
  }

  .spine-card {
    padding: 0.75rem;
  }

  .spine-card strong {
    font-size: 1.15rem;
  }

  .spine-card p {
    font-size: 0.92rem;
  }

  .spine-button {
    min-height: 3.4rem;
  }

  .brand-link {
    justify-self: start;
  }

  .utility-button {
    justify-self: end;
    width: auto;
  }

  .hero-actions {
    display: grid;
  }
}

@media (max-width: 640px) {
  .hero-setup h1 {
    font-size: 2.7rem;
  }

  .status-card {
    min-height: 4rem;
    padding: 0.55rem 0.35rem;
  }

  .status-card span {
    font-size: 0.76rem;
  }

  .status-card strong {
    font-size: 1.18rem;
  }

  .modal-head,
  .section-heading {
    flex-direction: column;
  }

  .zone-head {
    flex-direction: row;
    align-items: center;
  }

  .button,
  .spine-button {
    width: 100%;
  }

  .utility-button {
    width: auto;
  }
}