header {
  width: 100%;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--surface);
  border-bottom: 3px solid var(--border);
  z-index: 20;
}

.brand {
  display: flex;
  flex-direction: column;
}

.brand h1 {
  margin: 0;
  font-size: 1.25rem;
  background: var(--primary);
  display: inline-block;
  padding: 4px 10px;
  border: 2px solid var(--border);
}

.brand p {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.brand-mark {
  width: 58px;
  height: 58px;
  border: 2px solid var(--border);
  background: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.brand-svg {
  width: 44px;
  height: 44px;
  transition:
    transform var(--dur-fast) var(--ease-linear),
    filter var(--dur-fast) var(--ease-linear);
}

.brand-svg-stroke {
  fill: none;
  stroke: var(--border);
  stroke-width: 4;
  stroke-linecap: square;
  stroke-dasharray: 240;
  stroke-dashoffset: 240;
  animation: brandDraw 700ms var(--ease-linear) forwards;
}

main {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
  padding: 30px 0 70px;
}

.page-grid {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 18px;
  align-items: start;
}

.alras-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  background: var(--surface);
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
}

.sidebar-title {
  margin: 0 0 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.alras-item {
  padding: 12px 10px;
  border: 2px solid var(--border);
  background: transparent;
  color: var(--text);
  text-align: left;
  cursor: pointer;
  font-weight: 700;
}

.alras-item:hover,
.alras-item.active {
  background: var(--primary);
}

.page-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 0;
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
}

.hero-copy {
  background: var(--primary);
  padding: 32px;
  border-right: 3px solid var(--border);
}

.hero-copy h2 {
  margin: 0 0 12px;
  font-size: clamp(2.4rem, 5vw, 4.5rem);
  line-height: 0.95;
}

.hero-copy p {
  margin: 0;
  color: #222;
  line-height: 1.8;
  font-weight: 600;
}

.hero-panel {
  padding: 18px;
  background: var(--surface);
}

.hero-three-wrap {
  position: relative;
  width: 100%;
  height: 235px;
  border: 2px solid var(--border);
  background:
    radial-gradient(circle at 20% 30%, #173150, #08121f 52%, #05080d 100%);
  overflow: hidden;
  margin-bottom: 10px;
}

#hero-three-canvas {
  display: block;
  width: 100%;
  height: 100%;
  opacity: 0;
  transform: scale(1.03);
  transition:
    opacity calc(var(--dur-slow) + 180ms) var(--ease-linear),
    transform calc(var(--dur-slow) + 180ms) var(--ease-snap);
}

.hero-three-glow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 70% 26%, rgba(181, 226, 255, 0.22), transparent 42%),
    radial-gradient(circle at 30% 80%, rgba(82, 141, 255, 0.18), transparent 48%),
    linear-gradient(0deg, rgba(0, 0, 0, 0.35), transparent 35%);
  opacity: 0.1;
  transition: opacity calc(var(--dur-slow) + 220ms) var(--ease-linear);
}

.hero-ascii {
  border: 2px solid var(--border);
  background: #fff;
  padding: 10px;
  margin-bottom: 10px;
}

.hero-ascii-art {
  margin: 0;
  font-size: 0.74rem;
  font-family: "Courier New", Courier, monospace;
  font-weight: 700;
  line-height: 1.25;
  white-space: pre;
}

.hero-ascii-status {
  margin-top: 8px;
  border-top: 2px solid var(--border);
  padding-top: 6px;
  font-family: "Courier New", Courier, monospace;
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
}

#ascii-loader {
  display: inline-block;
  min-width: 110px;
}

.hero-ascii-overlay {
  position: absolute;
  inset: 0;
  margin-bottom: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.97), rgba(246, 248, 255, 0.97));
  transition:
    transform calc(var(--dur-slow) + 240ms) var(--ease-snap),
    opacity calc(var(--dur-slow) + 240ms) var(--ease-linear);
}

.hero-three-wrap.is-ready #hero-three-canvas {
  opacity: 1;
  transform: scale(1);
}

.hero-three-wrap.is-ready .hero-three-glow {
  opacity: 1;
}

.hero-three-wrap.is-ready .hero-ascii-overlay {
  transform: translateX(104%);
  opacity: 0;
  pointer-events: none;
}

.feature-list {
  display: grid;
  gap: 10px;
}

.feature-card {
  padding: 14px;
  background: var(--surface-soft);
  border: 2px solid var(--border);
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 10px;
  cursor: pointer;
  opacity: 0;
  transform: translateY(12px);
  animation: featureLinearReveal var(--dur-slow) var(--ease-linear) forwards;
  transition:
    transform var(--dur-base) var(--ease-snap),
    box-shadow var(--dur-fast) var(--ease-linear),
    background-color var(--dur-fast) var(--ease-linear);
}

.physics-toggle-btn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1200;
  border: 2px solid var(--border);
  background: var(--primary);
  color: var(--text);
  font-weight: 800;
  padding: 10px 14px;
  box-shadow: var(--shadow);
  cursor: pointer;
}

.physics-toggle-btn.active {
  background: #111;
  color: var(--primary);
}

.physics-floating {
  position: fixed !important;
  margin: 0 !important;
  transform: translate(-50%, -50%);
  transform-origin: center center;
  z-index: 1100 !important;
  will-change: transform;
  pointer-events: auto !important;
}

.feature-card:nth-child(1) {
  animation-delay: 40ms;
}

.feature-card:nth-child(2) {
  animation-delay: 100ms;
}

.feature-card:nth-child(3) {
  animation-delay: 160ms;
}

.feature-card:nth-child(4) {
  animation-delay: 220ms;
}

.feature-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 2px solid var(--border);
  background: #111;
  color: var(--primary);
  font-weight: 700;
}

.feature-card h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.hidden {
  display: none !important;
}

.app-screen {
  display: none;
  width: 100%;
  margin-top: 12px;
}

.section-enter {
  animation: sectionEnter calc(var(--dur-slow) + 220ms) var(--ease-snap);
}

.section-exit {
  animation: sectionExit calc(var(--dur-base) + 120ms) var(--ease-linear);
  pointer-events: none;
}

.text-flip {
  animation: textFlipIn calc(var(--dur-slow) + 260ms) var(--ease-snap);
  transform-origin: center top;
}

.jump-in {
  animation: jumpIn var(--dur-slow) var(--ease-linear);
}

@keyframes sectionEnter {
  0% {
    opacity: 0;
    transform: translateY(26px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes textFlipIn {
  0% {
    opacity: 0;
    transform: rotateX(-112deg) translateY(-22px);
  }
  100% {
    opacity: 1;
    transform: rotateX(0) translateY(0);
  }
}

@keyframes jumpIn {
  0% {
    opacity: 0;
    transform: translateY(12px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  border: 3px solid var(--border);
  background: var(--surface);
  margin-bottom: 16px;
}

.app-header h3 {
  margin: 0;
}

.muted-subtitle {
  margin: 6px 0 0;
  color: var(--muted);
}

.app-header button,
.controls button,
.wordle-input-area button,
.wordle-new-game,
#set-challenge-submit,
#set-challenge-newset {
  border: 2px solid var(--border);
  background: #fff;
  color: #111;
  padding: 10px 16px;
  border-radius: 0;
  font-weight: 700;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition:
    color var(--dur-fast) var(--ease-linear),
    transform var(--dur-fast) var(--ease-linear),
    box-shadow var(--dur-fast) var(--ease-linear);
}

.app-header button::before,
.controls button::before,
.wordle-input-area button::before,
.wordle-new-game::before,
#set-challenge-submit::before,
#set-challenge-newset::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-linear);
  z-index: -1;
}

.controls {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.controls button.secondary {
  background: #fff;
}

.controls button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.progress {
  margin-top: 12px;
  color: var(--muted);
  text-align: center;
  font-weight: 700;
}

.set-challenge-container,
.update-logs-container,
.wordle-container,
.history-table,
.cold-war-frame {
  background: var(--surface);
  border: 3px solid var(--border);
  box-shadow: var(--shadow);
  border-radius: 0;
}

.set-challenge-container,
.wordle-container,
.update-logs-container,
.history-table,
.cold-war-frame {
  padding: 20px;
}

.set-challenge-row label {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.update-logs-container {
  display: grid;
  gap: 14px;
}

.set-challenge-input,
.wordle-input-area input {
  width: 100%;
  padding: 10px 12px;
  border: 2px solid var(--border);
  background: #fff;
  color: var(--text);
  font-weight: 700;
  border-radius: 0;
}

.set-challenge-actions,
.wordle-input-area {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.log-entry {
  display: grid;
  gap: 12px;
}

.log-date {
  font-size: 1rem;
  font-weight: 800;
  color: #111;
  padding: 10px;
  background: var(--primary);
  border: 2px solid var(--border);
}

.log-item {
  display: flex;
  gap: 10px;
  padding: 10px;
  border: 2px solid var(--border);
  background: #fff;
  transition:
    transform var(--dur-fast) var(--ease-snap),
    box-shadow var(--dur-fast) var(--ease-linear);
}

.log-item span:last-child {
  position: relative;
  display: inline-block;
}

.log-item span:last-child::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--border);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-base) var(--ease-linear);
}

.log-badge {
  color: var(--success);
  font-weight: 800;
}

.wordle-status {
  text-align: center;
  font-size: 1.05rem;
  font-weight: 800;
  min-height: 26px;
}

.wordle-progress {
  width: 100%;
  height: 12px;
  margin: 8px 0 4px;
  border: 2px solid var(--border);
  background: #fff;
  overflow: hidden;
}

.wordle-progress-fill {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--primary);
  transition: width var(--dur-slow) var(--ease-linear);
}

.status-win {
  color: var(--success);
}

.status-lose {
  color: var(--danger);
}

.word-display {
  font-size: 2.2rem;
  letter-spacing: 0.28em;
  font-weight: 900;
  color: #111;
  font-family: 'Courier New', monospace;
  margin: 14px 0;
}

.wordle-guesses {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 80px;
}

.guess-line {
  display: flex;
  gap: 6px;
  justify-content: center;
}

.letter-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-size: 1.1rem;
  font-weight: 800;
  border-radius: 0;
  color: var(--text);
  border: 2px solid var(--border);
  background: #fff;
}

.letter-box.correct {
  background: #65d463;
}

.letter-box.present {
  background: var(--primary);
}

.letter-box.absent {
  background: #cfcfcf;
  color: #6b6b6b;
}

.wordle-attempts {
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.history-table table {
  width: 100%;
  border-collapse: collapse;
  color: var(--text);
}

.history-table th,
.history-table td {
  padding: 12px;
  border: 2px solid var(--border);
  text-align: left;
  background: #fff;
}

.history-table thead th {
  background: var(--primary);
  color: #111;
  font-weight: 800;
}

.cold-war-frame iframe {
  width: 100%;
  min-height: 720px;
  height: calc(100vh - 280px);
  border: 2px solid var(--border);
  background: #fff;
}

@keyframes featureLinearReveal {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes brandDraw {
  to {
    stroke-dashoffset: 0;
  }
}

@media (hover: hover) and (pointer: fine) {
  .feature-card:hover {
    background: #fff;
    transform: translateY(-2px);
    box-shadow: 3px 3px 0 var(--border);
  }

  .brand-mark:hover .brand-svg {
    transform: translateY(-1px);
    filter: drop-shadow(1px 1px 0 var(--primary));
  }

  .app-header button:hover::before,
  .controls button:hover::before,
  .wordle-input-area button:hover::before,
  .wordle-new-game:hover::before,
  #set-challenge-submit:hover::before,
  #set-challenge-newset:hover::before {
    transform: scaleX(1);
  }

  .app-header button:hover,
  .controls button:hover,
  .wordle-input-area button:hover,
  .wordle-new-game:hover,
  #set-challenge-submit:hover,
  #set-challenge-newset:hover {
    transform: translateY(-1px);
    box-shadow: 2px 2px 0 var(--border);
  }

  .log-item:hover {
    transform: translateX(3px);
    box-shadow: 2px 2px 0 var(--border);
  }

  .log-item:hover span:last-child::after {
    transform: scaleX(1);
  }
}

@media (max-width: 980px) {
  .page-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    border-right: 0;
    border-bottom: 3px solid var(--border);
  }
}

@media (max-width: 720px) {
  header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .brand-mark {
    width: 48px;
    height: 48px;
  }

  .brand-svg {
    width: 36px;
    height: 36px;
  }

  .hero-copy,
  .hero-panel,
  .app-header {
    padding: 16px;
  }

  .feature-card {
    grid-template-columns: 1fr;
  }
}