:root {
  --bg-top: #f4ede2;
  --bg-bottom: #d8e3d2;
  --panel: rgba(251, 248, 241, 0.82);
  --panel-strong: rgba(255, 252, 247, 0.96);
  --text-main: #1c241d;
  --text-muted: #59655b;
  --accent: #0f766e;
  --accent-strong: #0b5f58;
  --success: #15803d;
  --danger: #c2410c;
  --shadow: 0 28px 80px rgba(42, 54, 44, 0.16);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Aptos, "Trebuchet MS", "Segoe UI Variable Display", sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.75), transparent 38%),
    radial-gradient(circle at bottom right, rgba(15, 118, 110, 0.1), transparent 32%),
    linear-gradient(160deg, var(--bg-top), var(--bg-bottom));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(28, 36, 29, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 36, 29, 0.03) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, black 45%, transparent 100%);
}

body.drawer-open {
  overflow: hidden;
}

.page-shell {
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 48px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: start;
  margin-bottom: 24px;
}

.hero__copy,
.preview-panel,
.settings-drawer {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero__copy,
.preview-panel,
.settings-drawer {
  border-radius: var(--radius-xl);
}

.hero__copy {
  flex: 1;
  padding: 32px;
  animation: rise-in 600ms ease both;
}

.hero__settings {
  flex: 0 0 auto;
  align-self: center;
}

.eyebrow {
  margin: 0 0 8px;
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

h1,
h2 {
  margin: 0;
  line-height: 0.95;
  font-family: Georgia, "Times New Roman", serif;
}

h1 {
  font-size: clamp(3rem, 6vw, 5rem);
}

h2 {
  font-size: clamp(1.8rem, 2.5vw, 2.4rem);
}

.hero__lede,
.status,
.metric__label,
.preview-panel__size,
.field span,
.toggle span {
  color: var(--text-muted);
}

.hero__lede {
  max-width: 40rem;
  margin: 16px 0 0;
  font-size: 1.05rem;
  line-height: 1.6;
}

.workspace {
  display: grid;
}

.preview-panel {
  padding: 24px;
  overflow: hidden;
  animation: rise-in 850ms ease both;
}

.preview-panel__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: end;
  margin-bottom: 18px;
}

.preview-panel__size {
  margin: 0;
  text-align: right;
}

.canvas-frame {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 420px;
  padding: 18px;
  border-radius: calc(var(--radius-xl) - 6px);
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.78), rgba(244, 237, 226, 0.66)),
    linear-gradient(135deg, rgba(15, 118, 110, 0.06), rgba(201, 107, 59, 0.07));
  border: 1px solid rgba(28, 36, 29, 0.08);
  transition: box-shadow 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.canvas-frame::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: calc(var(--radius-xl) - 10px);
  border: 1px dashed rgba(28, 36, 29, 0.08);
  pointer-events: none;
}

.canvas-frame.is-refreshing #maze-canvas {
  opacity: 0.32;
  transform: scale(0.985);
}

.canvas-frame.is-success {
  box-shadow: 0 0 0 3px rgba(21, 128, 61, 0.22), 0 24px 60px rgba(21, 128, 61, 0.2);
}

.canvas-frame.is-error {
  box-shadow: 0 0 0 3px rgba(194, 65, 12, 0.22), 0 24px 60px rgba(194, 65, 12, 0.18);
}

#maze-canvas {
  max-width: 100%;
  height: auto;
  border-radius: 22px;
  box-shadow: 0 20px 50px rgba(17, 25, 22, 0.18);
  transform-origin: center;
  transition: transform 240ms ease, opacity 240ms ease;
}

.answer-buttons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.answer-button {
  border-radius: 16px;
  border: 1px solid rgba(28, 36, 29, 0.08);
  background: rgba(255, 255, 255, 0.7);
  padding: 16px 14px;
  color: var(--text-main);
  font: inherit;
  cursor: pointer;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.answer-button:hover:not(:disabled) {
  transform: translateY(-1px);
}

.answer-button:disabled {
  cursor: default;
  opacity: 0.85;
}

.answer-button.is-correct {
  background: rgba(21, 128, 61, 0.14);
  border-color: rgba(21, 128, 61, 0.34);
  box-shadow: 0 12px 28px rgba(21, 128, 61, 0.12);
}

.answer-button.is-wrong {
  background: rgba(194, 65, 12, 0.12);
  border-color: rgba(194, 65, 12, 0.28);
  box-shadow: 0 12px 28px rgba(194, 65, 12, 0.12);
}

.answer-button__label {
  display: block;
  font-size: 1rem;
  font-weight: 700;
}

.answer-button__meta {
  display: block;
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.metric {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 252, 247, 0.7);
  border: 1px solid rgba(28, 36, 29, 0.08);
}

.metric strong {
  display: block;
  margin-top: 6px;
  font-size: 1.1rem;
}

.status {
  min-height: 1.4rem;
  margin: 16px 2px 0;
  font-size: 0.95rem;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font: inherit;
  cursor: pointer;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(1px);
}

.button--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #f4faf8;
  box-shadow: 0 14px 24px rgba(11, 95, 88, 0.25);
}

.button--ghost {
  background: rgba(255, 255, 255, 0.65);
  color: var(--text-main);
  border: 1px solid rgba(28, 36, 29, 0.08);
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(18, 28, 24, 0.28);
  opacity: 0;
  transition: opacity 220ms ease;
}

.drawer-backdrop.is-visible {
  opacity: 1;
}

.settings-drawer {
  position: fixed;
  top: 16px;
  right: 16px;
  bottom: 16px;
  width: min(420px, calc(100vw - 24px));
  padding: 22px;
  transform: translateX(calc(100% + 20px));
  transition: transform 240ms ease;
  z-index: 10;
  overflow: auto;
}

.settings-drawer.is-open {
  transform: translateX(0);
}

.settings-drawer__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  margin-bottom: 18px;
}

.settings-drawer__close {
  flex: 0 0 auto;
}

.controls {
  display: grid;
  gap: 18px;
}

.controls__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.field--wide {
  grid-column: 1 / -1;
}

input[type="number"],
input[type="text"] {
  width: 100%;
  border: 1px solid rgba(28, 36, 29, 0.12);
  border-radius: var(--radius-md);
  background: var(--panel-strong);
  color: var(--text-main);
  padding: 13px 14px;
  font: inherit;
  transition: border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

input[type="number"]:focus,
input[type="text"]:focus {
  outline: none;
  border-color: rgba(15, 118, 110, 0.45);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.1);
  transform: translateY(-1px);
}

.seed-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.toggles {
  display: grid;
  gap: 12px;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.38);
  border: 1px solid rgba(28, 36, 29, 0.08);
}

.toggle input {
  accent-color: var(--accent);
  width: 18px;
  height: 18px;
  margin: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 860px) {
  .hero {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__settings {
    align-self: start;
  }

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

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1100px);
    padding-top: 18px;
  }

  .hero__copy,
  .preview-panel,
  .settings-drawer {
    border-radius: 22px;
  }

  .controls__grid,
  .summary,
  .answer-buttons {
    grid-template-columns: 1fr;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .preview-panel__header,
  .settings-drawer__header {
    flex-direction: column;
    align-items: start;
  }

  .canvas-frame {
    min-height: 280px;
    padding: 12px;
  }

  .settings-drawer {
    top: 10px;
    right: 10px;
    bottom: 10px;
    width: calc(100vw - 20px);
  }
}