:root {
  --bg: #f5efe5;
  --bg-soft: #fbf7f1;
  --paper: rgba(255, 251, 244, 0.78);
  --paper-strong: #fffaf2;
  --ink: #1e1b18;
  --muted: #6d645d;
  --line: rgba(49, 40, 31, 0.12);
  --line-strong: rgba(49, 40, 31, 0.2);
  --blue: #2459d6;
  --red: #d34a2b;
  --amber: #c77713;
  --green: #147e58;
  --purple: #7349c7;
  --shadow: 0 20px 50px rgba(38, 23, 6, 0.1);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "IBM Plex Sans", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(36, 89, 214, 0.1), transparent 28rem),
    radial-gradient(circle at top right, rgba(211, 74, 43, 0.12), transparent 24rem),
    linear-gradient(180deg, #f8f3ea 0%, #efe5d7 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.2) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.18) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(180deg, black 20%, transparent 100%);
}

a {
  color: inherit;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.page-shell {
  width: min(1500px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--paper);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.reveal {
  animation: rise 700ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero {
  padding: 28px;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(36, 89, 214, 0.18) 0%, transparent 70%);
}

.eyebrow {
  margin-bottom: 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-grid {
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: start;
}

.hero-copy h1,
.panel-head h2 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: clamp(2.4rem, 4vw, 4.4rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
}

.panel-head h2 {
  font-size: clamp(1.5rem, 2vw, 2.1rem);
  line-height: 1;
}

.hero-lead {
  max-width: 58ch;
  margin: 18px 0 0;
  font-size: 1.08rem;
  line-height: 1.65;
  color: var(--muted);
}

.hero-actions,
.diagram-actions,
.timer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-actions {
  margin-top: 24px;
}

.button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

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

.button-primary {
  background: linear-gradient(135deg, var(--blue), #123c9f);
  color: #fff;
}

.button-secondary {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
  text-decoration: none;
}

.button-quiet {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.55);
  color: var(--muted);
}

.hero-stats {
  display: grid;
  gap: 12px;
}

.stat-card,
.timer-card,
.result-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.76);
  padding: 18px;
}

.stat-label,
.timer-label {
  display: block;
  margin-bottom: 8px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.stat-card strong,
.timer-card strong {
  display: block;
  font-size: 1.2rem;
  line-height: 1.1;
}

.stat-card p,
.timer-meta,
.timer-note,
.detail-copy,
.detail-note,
.result-copy {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(360px, 0.8fr);
  gap: 20px;
  margin-top: 20px;
}

.studio {
  display: grid;
  gap: 20px;
}

.diagram-panel {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
  min-height: 820px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.panel-head.compact h2 {
  font-size: clamp(1.3rem, 1.8vw, 1.7rem);
}

.zoom-control {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0 14px;
  background: rgba(255, 255, 255, 0.7);
}

.zoom-control span {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  color: var(--muted);
  text-transform: uppercase;
}

.zoom-control input {
  width: 120px;
}

.diagram-stage {
  display: grid;
  gap: 16px;
  min-height: 0;
  flex: 1;
}

.diagram-viewport,
.source-panel {
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(249, 243, 232, 0.92));
  overflow: auto;
}

.diagram-viewport {
  min-height: 690px;
}

.diagram-canvas {
  padding: 20px;
  min-width: fit-content;
}

.diagram-mount {
  width: fit-content;
  transform-origin: top left;
}

.diagram-mount svg {
  height: auto;
  max-width: none;
}

.source-panel pre {
  margin: 0;
  padding: 22px;
  min-width: 100%;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre;
}

.is-hidden {
  display: none;
}

.loading-state {
  padding: 30px;
  color: var(--muted);
}

.step-tabs {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.step-tab {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
  text-align: left;
}

.step-tab[aria-selected="true"] {
  border-color: rgba(36, 89, 214, 0.4);
  box-shadow: inset 0 0 0 1px rgba(36, 89, 214, 0.18);
  background: rgba(235, 242, 255, 0.95);
}

.step-tab-title {
  font-weight: 700;
}

.step-tab-meta {
  font-size: 0.88rem;
  color: var(--muted);
}

.step-tab-progress {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--muted);
}

.step-detail {
  margin-top: 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.detail-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
}

.detail-head h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  font-size: 1.8rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.badge-strong {
  color: var(--green);
  background: rgba(20, 126, 88, 0.12);
}

.badge-watch {
  color: var(--amber);
  background: rgba(199, 119, 19, 0.14);
}

.badge-critical {
  color: var(--red);
  background: rgba(211, 74, 43, 0.12);
}

.detail-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.detail-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
  padding: 16px;
}

.detail-card h4 {
  margin: 0 0 12px;
  font-size: 0.96rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.checklist,
.warning-list,
.detail-card ul,
.result-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.checklist-item,
.warning-list li,
.result-list li {
  margin-top: 10px;
}

.checklist-item:first-child,
.warning-list li:first-child,
.result-list li:first-child {
  margin-top: 0;
}

.check-toggle {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.82);
  color: var(--ink);
  text-align: left;
}

.check-toggle[data-done="true"] {
  border-color: rgba(20, 126, 88, 0.3);
  background: rgba(20, 126, 88, 0.12);
}

.check-label {
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.45;
}

.check-bullet {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
  border: 1.5px solid var(--line-strong);
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  font-size: 0.75rem;
}

.check-toggle[data-done="true"] .check-bullet {
  border-color: var(--green);
  background: var(--green);
  color: #fff;
}

.warning-list li {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(211, 74, 43, 0.08);
  color: #7b311d;
  line-height: 1.45;
}

.quote-card {
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(36, 89, 214, 0.12), rgba(115, 73, 199, 0.09));
}

.quote-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.quote-card p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
}

.example-card {
  margin-top: 16px;
  padding: 16px;
  border: 1px solid rgba(115, 73, 199, 0.18);
  border-radius: var(--radius-md);
  background: rgba(115, 73, 199, 0.08);
}

.example-card h4 {
  margin: 10px 0 0;
  font-size: 1rem;
}

.example-prompt {
  margin: 10px 0 0;
  color: var(--ink);
  font-weight: 600;
}

.example-say {
  margin: 14px 0 0;
  padding: 14px;
  border-radius: 14px;
  background: rgba(20, 126, 88, 0.1);
  color: #0f5f44;
  line-height: 1.6;
}

.example-say p {
  margin: 0 0 10px;
}

.example-say p:last-child {
  margin-bottom: 0;
}

.timer-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.timer-card.accent {
  background: linear-gradient(135deg, rgba(36, 89, 214, 0.14), rgba(115, 73, 199, 0.12));
}

.timer-card strong {
  font-size: clamp(1.5rem, 2vw, 2rem);
}

.timer-actions {
  margin-top: 16px;
}

.timer-note {
  margin-bottom: 0;
}

.quiz-form,
.metric-lab {
  display: grid;
  gap: 14px;
}

.memory-panel {
  display: grid;
  gap: 16px;
}

.memory-grid,
.priority-list,
.prompt-list {
  display: grid;
  gap: 10px;
}

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

.memory-tile {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.76);
}

.memory-tile.priority {
  border-color: rgba(199, 119, 19, 0.22);
  background: rgba(199, 119, 19, 0.09);
}

.memory-name {
  font-size: 0.92rem;
  line-height: 1.45;
}

.memory-value,
.priority-number {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.86rem;
  color: var(--amber);
  white-space: nowrap;
}

.memory-section {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
  padding: 16px;
}

.memory-section h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.prompt-list li,
.priority-item {
  display: flex;
  gap: 10px;
  padding-top: 10px;
  line-height: 1.5;
}

.prompt-list li:first-child,
.priority-item:first-child {
  padding-top: 0;
}

.priority-detail {
  color: var(--muted);
  font-size: 0.92rem;
}

.quiz-form label,
.metric-lab label {
  display: grid;
  gap: 8px;
}

.quiz-form span,
.metric-lab span {
  font-size: 0.95rem;
  line-height: 1.45;
}

.quiz-form select,
.metric-lab input,
.metric-lab textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
}

.result-card {
  min-height: 144px;
}

.result-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.result-head h3 {
  margin: 0;
  font-size: 1.25rem;
}

.result-copy {
  margin-top: 12px;
}

.result-list {
  margin-top: 14px;
}

.result-list li {
  padding-left: 18px;
  position: relative;
  line-height: 1.5;
}

.result-list li::before {
  content: "•";
  position: absolute;
  left: 0;
}

.verdict-strong {
  border-color: rgba(20, 126, 88, 0.25);
  background: rgba(20, 126, 88, 0.1);
}

.verdict-watch {
  border-color: rgba(199, 119, 19, 0.24);
  background: rgba(199, 119, 19, 0.1);
}

.verdict-critical {
  border-color: rgba(211, 74, 43, 0.24);
  background: rgba(211, 74, 43, 0.09);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1180px) {
  .layout,
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .diagram-panel {
    min-height: 0;
  }
}

@media (max-width: 820px) {
  .page-shell {
    width: min(100vw - 16px, 100%);
    padding-top: 16px;
  }

  .hero,
  .diagram-panel,
  .studio > .panel {
    padding: 18px;
    border-radius: 24px;
  }

  .panel-head,
  .detail-head,
  .result-head {
    flex-direction: column;
  }

  .step-tabs,
  .detail-grid,
  .timer-grid,
  .memory-grid {
    grid-template-columns: 1fr;
  }

  .diagram-viewport {
    min-height: 520px;
  }

  .diagram-actions {
    width: 100%;
  }

  .zoom-control {
    width: 100%;
    justify-content: space-between;
  }

  .zoom-control input {
    width: min(180px, 45vw);
  }
}