:root {
  --page-background: #0d1117;
  --page-background-deep: #090c11;

  --surface-primary: rgba(21, 27, 36, 0.94);
  --surface-secondary: rgba(27, 35, 48, 0.94);
  --surface-raised: rgba(32, 42, 56, 0.96);
  --surface-soft: rgba(38, 48, 64, 0.74);

  --text-primary: #f2f4f8;
  --text-bright: #ffffff;
  --text-secondary: #c2cad5;
  --text-muted: #8994a3;
  --text-dim: #657181;

  --border-primary: rgba(150, 166, 190, 0.24);
  --border-strong: rgba(150, 166, 190, 0.42);
  --border-soft: rgba(150, 166, 190, 0.14);

  --purple: #8b5cf6;
  --purple-light: #b99cff;
  --purple-dark: #5d35b5;

  --turquoise: #38d6d0;
  --turquoise-light: #8af4ee;

  --green: #69dc8b;
  --yellow: #e7c66a;
  --orange: #d99a62;

  --purple-glow: rgba(139, 92, 246, 0.22);
  --turquoise-glow: rgba(56, 214, 208, 0.16);
  --green-glow: rgba(105, 220, 139, 0.18);
  --shadow-dark: rgba(0, 0, 0, 0.36);

  --font-body:
    "DM Sans",
    Arial,
    sans-serif;

  --font-mono:
    "Space Mono",
    "IBM Plex Mono",
    "Courier New",
    monospace;

  --text-size: 1rem;
  --small-size: 0.82rem;
  --label-size: 0.72rem;
  --code-size: 0.84rem;

  --content-width: 1040px;
  --page-padding: clamp(1rem, 4vw, 3rem);

  --space-xs: 0.35rem;
  --space-sm: 0.65rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.25rem;
  --space-2xl: 3.5rem;
  --space-3xl: 5rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;

  --transition:
    background 0.25s ease,
    border-color 0.25s ease,
    box-shadow 0.25s ease,
    color 0.25s ease,
    transform 0.25s ease;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
  scrollbar-color: var(--purple) var(--page-background-deep);
  scrollbar-width: thin;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--text-primary);
  background:
    radial-gradient(
      circle at 8% 0%,
      rgba(139, 92, 246, 0.2),
      transparent 30%
    ),
    radial-gradient(
      circle at 94% 14%,
      rgba(56, 214, 208, 0.12),
      transparent 28%
    ),
    linear-gradient(
      145deg,
      var(--page-background),
      var(--page-background-deep) 58%,
      #111522
    );
  font-family: var(--font-body);
  font-size: var(--text-size);
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(
      120deg,
      transparent 0%,
      rgba(255, 255, 255, 0.012) 48%,
      transparent 100%
    );
  content: "";
  pointer-events: none;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
}

a {
  color: var(--turquoise);
  text-decoration: none;
  text-underline-offset: 0.2em;
  transition: var(--transition);
}

a:hover,
a:focus-visible {
  color: var(--turquoise-light);
}

a:focus-visible {
  outline: 2px solid var(--turquoise);
  outline-offset: 4px;
}

p,
ul,
ol,
pre,
blockquote,
table {
  margin-top: 0;
}

ul,
ol {
  padding-left: 1.35rem;
}

li + li {
  margin-top: var(--space-sm);
}

::selection {
  color: var(--page-background);
  background: var(--turquoise);
}

.terminal-page {
  width: min(100%, var(--content-width));
  margin: 0 auto;
  padding: var(--space-xl) var(--page-padding) var(--space-3xl);
}

.terminal-header,
.terminal-navigation,
.terminal-section,
.terminal-footer {
  width: 100%;
}

.terminal-header {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(
      135deg,
      rgba(28, 27, 54, 0.96),
      rgba(18, 29, 42, 0.96)
    );
  box-shadow:
    0 24px 70px var(--shadow-dark),
    0 0 50px rgba(139, 92, 246, 0.08);
}

.terminal-header::before {
  position: absolute;
  top: -180px;
  right: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(56, 214, 208, 0.2),
    transparent 68%
  );
  content: "";
  pointer-events: none;
}

.terminal-header::after {
  position: absolute;
  bottom: -180px;
  left: -160px;
  width: 430px;
  height: 430px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(139, 92, 246, 0.2),
    transparent 68%
  );
  content: "";
  pointer-events: none;
}

.terminal-window-bar {
  position: relative;
  z-index: 1;
  display: flex;
  gap: var(--space-sm);
  align-items: center;
  min-height: 2.5rem;
  padding: 0 var(--space-lg);
  border-bottom: 1px solid var(--border-soft);
  background: rgba(8, 12, 18, 0.48);
}

.terminal-control {
  width: 0.62rem;
  height: 0.62rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
}

.terminal-control-dark {
  background: var(--purple);
  box-shadow: 0 0 10px var(--purple-glow);
}

.terminal-control-mid {
  background: var(--turquoise);
  box-shadow: 0 0 10px var(--turquoise-glow);
}

.terminal-control-light {
  background: var(--green);
  box-shadow: 0 0 10px var(--green-glow);
}

.terminal-header-content {
  position: relative;
  z-index: 1;
  padding: clamp(2rem, 6vw, 5rem);
}

.terminal-path,
.terminal-command,
.terminal-label,
.section-index,
.terminal-model-label,
.terminal-card-label,
.terminal-notice-label,
.terminal-warning-label,
.terminal-example-label,
.metadata-key,
.status-symbol,
.layer-number,
.lifecycle-number,
.strength-number,
.limitation-number,
.core-idea-number,
.test-number {
  font-family: var(--font-mono);
}

.terminal-path {
  margin-bottom: var(--space-xl);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: var(--small-size);
  overflow-wrap: anywhere;
}

.terminal-command {
  display: flex;
  gap: var(--space-sm);
  align-items: baseline;
  margin-bottom: var(--space-lg);
  color: var(--turquoise);
  font-family: var(--font-mono);
  font-size: var(--small-size);
  line-height: 1.6;
}

.terminal-prompt {
  color: var(--purple-light);
  font-weight: 700;
}

.terminal-label {
  margin-bottom: var(--space-sm);
  color: var(--turquoise);
  font-family: var(--font-mono);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.terminal-header h1 {
  max-width: 850px;
  margin: 0;
  color: var(--text-bright);
  font-size: clamp(2.1rem, 5vw, 4.4rem);
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.terminal-title {
  margin: var(--space-md) 0 0;
  color: var(--purple-light);
  font-size: clamp(1.05rem, 2vw, 1.45rem);
  font-weight: 600;
}

.terminal-introduction {
  max-width: 760px;
  margin: var(--space-xl) 0 0;
  color: var(--text-secondary);
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  line-height: 1.8;
}

.terminal-navigation {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: rgba(21, 27, 36, 0.82);
  box-shadow: 0 14px 35px var(--shadow-dark);
}

.terminal-navigation .terminal-command {
  margin-bottom: var(--space-md);
}

.terminal-navigation-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-sm) var(--space-lg);
}

.terminal-navigation-list a {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: var(--small-size);
  transition: var(--transition);
}

.terminal-navigation-list a::before {
  margin-right: var(--space-xs);
  color: var(--purple-light);
  content: "→";
}

.terminal-navigation-list a:hover {
  border-color: var(--border-primary);
  color: var(--turquoise-light);
  background: rgba(56, 214, 208, 0.07);
  transform: translateX(3px);
}

.terminal-section {
  position: relative;
  margin-top: var(--space-3xl);
  padding-top: var(--space-2xl);
  border-top: 1px solid var(--border-primary);
}

.terminal-section:first-of-type {
  margin-top: var(--space-3xl);
}

.section-index {
  margin-bottom: var(--space-sm);
  color: var(--turquoise);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.terminal-section h2 {
  max-width: 850px;
  margin: 0 0 var(--space-xl);
  color: var(--text-bright);
  font-size: clamp(1.55rem, 3vw, 2.45rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.2;
}

.terminal-section h3 {
  margin: 0;
  color: var(--purple-light);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
}

.terminal-section p,
.terminal-section li {
  max-width: 850px;
}

.terminal-section p {
  color: var(--text-secondary);
}

.terminal-lead {
  color: var(--text-primary) !important;
  font-size: 1.08rem;
  font-weight: 500;
}

.terminal-command-bottom {
  margin-top: var(--space-xl);
  margin-bottom: 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-soft);
}

.terminal-quote {
  margin: var(--space-xl) 0;
  padding: var(--space-lg) var(--space-xl);
  border: 1px solid rgba(139, 92, 246, 0.34);
  border-left: 4px solid var(--purple);
  border-radius: var(--radius-md);
  background:
    linear-gradient(
      135deg,
      rgba(139, 92, 246, 0.14),
      rgba(56, 214, 208, 0.07)
    );
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

.terminal-quote p {
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 600;
}

.terminal-quote p:last-child {
  margin-bottom: 0;
}

.terminal-notice,
.terminal-warning {
  margin: var(--space-xl) 0;
  padding: var(--space-lg) var(--space-xl);
  border-radius: var(--radius-md);
  background: var(--surface-secondary);
}

.terminal-notice {
  border: 1px solid rgba(105, 220, 139, 0.38);
  border-left: 4px solid var(--green);
  box-shadow: 0 0 28px rgba(105, 220, 139, 0.05);
}

.terminal-warning {
  border: 1px solid rgba(231, 198, 106, 0.38);
  border-left: 4px solid var(--yellow);
  background:
    linear-gradient(
      135deg,
      rgba(231, 198, 106, 0.1),
      rgba(27, 35, 48, 0.94)
    );
}

.terminal-notice-label,
.terminal-warning-label {
  margin-bottom: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.terminal-notice-label {
  color: var(--green);
}

.terminal-warning-label {
  color: var(--yellow);
}

.terminal-notice p:last-child,
.terminal-warning p:last-child {
  margin-bottom: 0;
}

.terminal-metadata {
  margin: var(--space-xl) 0;
  overflow: hidden;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
}

.metadata-row {
  display: grid;
  grid-template-columns: minmax(10rem, 0.8fr) minmax(0, 2fr);
  gap: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-soft);
}

.metadata-row:last-child {
  border-bottom: 0;
}

.metadata-key {
  color: var(--turquoise);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.metadata-value {
  min-width: 0;
  color: var(--text-secondary);
  overflow-wrap: anywhere;
}

.metadata-value a {
  color: var(--purple-light);
}

.terminal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.terminal-card {
  position: relative;
  min-width: 0;
  padding: var(--space-xl);
  overflow: hidden;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background:
    linear-gradient(
      145deg,
      rgba(32, 42, 56, 0.94),
      rgba(21, 27, 36, 0.96)
    );
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
}

.terminal-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--purple),
    var(--turquoise)
  );
  content: "";
  opacity: 0.75;
}

.terminal-card:hover {
  border-color: rgba(139, 92, 246, 0.48);
  box-shadow:
    0 16px 34px rgba(0, 0, 0, 0.28),
    0 0 24px rgba(139, 92, 246, 0.08);
  transform: translateY(-3px);
}

.terminal-card-label {
  margin-bottom: var(--space-sm);
  color: var(--turquoise);
  font-family: var(--font-mono);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.terminal-card p:last-child {
  margin-bottom: 0;
}

.terminal-model,
.terminal-example {
  margin: var(--space-xl) 0;
  overflow: hidden;
  border: 1px solid rgba(56, 214, 208, 0.28);
  border-radius: var(--radius-md);
  background:
    linear-gradient(
      145deg,
      rgba(12, 27, 35, 0.96),
      rgba(19, 25, 36, 0.98)
    );
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
}

.terminal-model-label,
.terminal-example-label {
  margin-bottom: 0;
  padding: var(--space-sm) var(--space-lg);
  border-bottom: 1px solid rgba(56, 214, 208, 0.2);
  color: var(--turquoise);
  font-family: var(--font-mono);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.terminal-model pre,
.terminal-example pre {
  margin: 0;
  padding: var(--space-xl);
  color: var(--turquoise-light);
  font-family: var(--font-mono);
  font-size: var(--code-size);
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  overflow-x: auto;
}

.terminal-model code,
.terminal-example code {
  color: inherit;
  font-family: inherit;
}

.terminal-example > p:not(.terminal-example-label) {
  padding-right: var(--space-xl);
  padding-left: var(--space-xl);
}

.terminal-example > p:last-child {
  margin-bottom: var(--space-xl);
}

.terminal-comparison,
.evidence-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-lg);
  margin: var(--space-xl) 0;
}

.comparison-column,
.evidence-column {
  min-width: 0;
  padding: var(--space-xl);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
}

.comparison-column .terminal-card-label,
.evidence-column .terminal-card-label {
  color: var(--purple-light);
}

.comparison-column pre {
  margin: var(--space-md) 0;
  color: var(--turquoise-light);
  font-family: var(--font-mono);
  font-size: var(--code-size);
  line-height: 1.7;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.comparison-column ul,
.evidence-column ul {
  margin-bottom: 0;
}

.status-list,
.layer-list,
.lifecycle-list,
.strength-list,
.limitation-list,
.core-idea-list,
.test-condition-list {
  display: grid;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.status-entry,
.layer-entry,
.lifecycle-entry,
.strength-entry,
.limitation-entry,
.core-idea-entry,
.test-condition {
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: start;
  padding: var(--space-lg);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
  transition: var(--transition);
}

.status-entry:hover,
.layer-entry:hover,
.lifecycle-entry:hover,
.strength-entry:hover,
.limitation-entry:hover,
.core-idea-entry:hover,
.test-condition:hover {
  border-color: rgba(56, 214, 208, 0.4);
  background: var(--surface-secondary);
  transform: translateX(3px);
}

.status-entry-header,
.test-condition-header {
  display: flex;
  flex-wrap: wrap;
  grid-column: 1 / -1;
  gap: var(--space-sm);
  align-items: baseline;
}

.status-entry p,
.layer-content p,
.lifecycle-content p,
.strength-content p,
.limitation-content p,
.core-idea-content p,
.test-condition p {
  margin-bottom: 0;
}

.status-entry-header + p {
  grid-column: 1 / -1;
}

.status-symbol,
.layer-number,
.lifecycle-number,
.strength-number,
.limitation-number,
.core-idea-number,
.test-number {
  color: var(--turquoise);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.layer-entry,
.lifecycle-entry,
.strength-entry,
.limitation-entry,
.core-idea-entry {
  grid-template-columns: 4rem minmax(0, 1fr);
}

.layer-content,
.lifecycle-content,
.strength-content,
.limitation-content,
.core-idea-content {
  min-width: 0;
}

.layer-content h3,
.lifecycle-content h3,
.strength-content h3,
.limitation-content h3,
.core-idea-content h3 {
  margin-bottom: var(--space-sm);
}

.test-condition {
  grid-template-columns: minmax(0, 1fr);
}

.evaluation-table-wrapper {
  width: 100%;
  margin: var(--space-xl) 0;
  overflow-x: auto;
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background: var(--surface-primary);
}

.evaluation-table {
  width: 100%;
  min-width: 650px;
  border-collapse: collapse;
}

.evaluation-table th,
.evaluation-table td {
  padding: var(--space-md) var(--space-lg);
  border-right: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  text-align: left;
  vertical-align: top;
}

.evaluation-table th:last-child,
.evaluation-table td:last-child {
  border-right: 0;
}

.evaluation-table tr:last-child td {
  border-bottom: 0;
}

.evaluation-table th {
  color: var(--turquoise);
  background: var(--surface-raised);
  font-family: var(--font-mono);
  font-size: var(--label-size);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.evaluation-table td {
  color: var(--text-secondary);
  font-size: var(--small-size);
}

.evaluation-table td:first-child {
  width: 35%;
  color: var(--purple-light);
  font-weight: 600;
}

.terminal-section-end {
  padding-bottom: var(--space-md);
}

.terminal-footer {
  margin-top: var(--space-3xl);
  padding: var(--space-xl);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  background:
    linear-gradient(
      145deg,
      rgba(28, 27, 54, 0.92),
      rgba(18, 29, 42, 0.92)
    );
  text-align: center;
}

.terminal-footer .terminal-command {
  justify-content: center;
}

.terminal-footer p {
  color: var(--text-muted);
  font-size: var(--small-size);
}

.terminal-footer p:last-of-type {
  margin-bottom: 0;
}

.terminal-cursor {
  display: none;
}

@media (max-width: 780px) {
  :root {
    --text-size: 0.95rem;
    --code-size: 0.78rem;
  }

  .terminal-page {
    padding-top: var(--space-md);
    padding-right: var(--space-md);
    padding-left: var(--space-md);
  }

  .terminal-header-content {
    padding: var(--space-xl) var(--space-lg);
  }

  .terminal-navigation {
    padding: var(--space-md);
  }

  .terminal-navigation-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-xs) var(--space-sm);
  }

  .terminal-grid,
  .terminal-comparison,
  .evidence-columns {
    grid-template-columns: 1fr;
  }

  .metadata-row {
    grid-template-columns: 1fr;
    gap: var(--space-xs);
  }

  .metadata-key {
    margin-bottom: var(--space-xs);
  }

  .terminal-card,
  .comparison-column,
  .evidence-column {
    padding: var(--space-lg);
  }

  .terminal-model pre,
  .terminal-example pre {
    padding: var(--space-lg);
  }
}

@media (max-width: 520px) {
  .terminal-navigation-list {
    grid-template-columns: 1fr;
  }

  .terminal-header h1 {
    font-size: 2rem;
  }

  .terminal-section h2 {
    font-size: 1.6rem;
  }

  .terminal-command {
    gap: var(--space-xs);
    font-size: 0.72rem;
  }

  .terminal-quote,
  .terminal-notice,
  .terminal-warning {
    padding: var(--space-md);
  }

  .status-entry,
  .layer-entry,
  .lifecycle-entry,
  .strength-entry,
  .limitation-entry,
  .core-idea-entry {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
    padding: var(--space-md);
  }

  .status-entry-header {
    grid-column: auto;
  }
}

@media print {
  :root {
    --page-background: #ffffff;
    --page-background-deep: #ffffff;
    --surface-primary: #ffffff;
    --surface-secondary: #f4f4f4;
    --surface-raised: #eeeeee;
    --text-primary: #111111;
    --text-bright: #000000;
    --text-secondary: #222222;
    --text-muted: #555555;
    --border-primary: #999999;
    --border-soft: #cccccc;
    --purple: #4e269c;
    --purple-light: #4e269c;
    --turquoise: #08736f;
    --turquoise-light: #08736f;
  }

  body {
    background: #ffffff;
  }

  body::before,
  .terminal-window-bar,
  .terminal-navigation {
    display: none;
  }

  .terminal-page {
    width: 100%;
    padding: 0;
  }

  .terminal-header,
  .terminal-section,
  .terminal-footer {
    box-shadow: none;
  }

  .terminal-header,
  .terminal-card,
  .terminal-model,
  .terminal-example,
  .terminal-notice,
  .terminal-warning,
  .terminal-quote {
    break-inside: avoid;
  }

  a {
    color: #111111;
    text-decoration: underline;
  }
}