@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* Cooper Typography Specimen Stylesheet */

@import url('fonts.css');

/* --- Theme Variable Definitions --- */
:root {
  /* Common typography tokens */
  --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
  --font-serif: 'Cooper', Georgia, serif;
  
  --transition-speed: 0.3s;
  
  /* Theme specific - Dark Mode (Default) */
  --bg: #181818;
  --text: #f5f5f5;
  --text-sec: #a0a0a0;
  --text-muted: #666666;
  --border: #333333;
  --border-cell: #2a2a2a;
  --bg-card: rgba(30, 30, 30, 0.7);
  --footer-bg: #111111;
  
  --yellow-bg: #ffd13b; /* Vibrant Yellow block */
  --yellow-text: #111111;
  --yellow-border: rgba(17, 17, 17, 0.15);
  
  --green-bg: #4be084; /* Beautiful Green block */
  --green-text: #111111;
  --green-border: rgba(17, 17, 17, 0.15);
  
  --blue-bg: #4ba3e3; /* Electric Blue block */
  --blue-text: #111111;
  --blue-border: rgba(17, 17, 17, 0.15);

  --orange-bg: #ff6f43; /* Vibrant Orange block */
  --orange-text: #111111;
  --orange-border: rgba(17, 17, 17, 0.15);

  --rose-bg: #ff5b94; /* Vibrant Rose Pink block */
  --rose-text: #111111;
  --rose-border: rgba(17, 17, 17, 0.15);

  --teal-bg: #7ae2cf; /* Beautiful Pastel Teal block */
  --teal-text: #111111;
  --teal-border: rgba(17, 17, 17, 0.15);

  --purple-bg: #beaaef; /* Light Pastel Purple block */
  --purple-text: #111111;
  --purple-border: rgba(17, 17, 17, 0.15);
  
  --accent-color: #ffd13b;
}

[data-theme="light"] {
  /* Theme specific - Light Mode */
  --bg: #f5f5f5;
  --text: #181818;
  --text-sec: #555555;
  --text-muted: #999999;
  --border: #dddddd;
  --border-cell: #e2e2e2;
  --bg-card: rgba(255, 255, 255, 0.7);
  --footer-bg: #eaeaea;
  
  --yellow-bg: #ffd13b; /* Keeps vibrant yellow */
  --yellow-text: #111111;
  --yellow-border: rgba(17, 17, 17, 0.12);
  
  --green-bg: #4be084; /* Keeps vibrant green */
  --green-text: #111111;
  --green-border: rgba(17, 17, 17, 0.12);
  
  --blue-bg: #4ba3e3;
  --blue-text: #111111;
  --blue-border: rgba(17, 17, 17, 0.12);

  --orange-bg: #ff6f43;
  --orange-text: #111111;
  --orange-border: rgba(17, 17, 17, 0.12);

  --rose-bg: #ff5b94;
  --rose-text: #111111;
  --rose-border: rgba(17, 17, 17, 0.12);

  --teal-bg: #7ae2cf;
  --teal-text: #111111;
  --teal-border: rgba(17, 17, 17, 0.12);

  --purple-bg: #e5dbff;
  --purple-text: #111111;
  --purple-border: rgba(17, 17, 17, 0.12);
  
  --accent-color: #d35400;
}

/* --- Base Rules --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-serif);
  font-weight: 300;
  transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
  overflow-x: hidden;
  line-height: 1.5;
}

/* Custom Selection Color */
::selection {
  background-color: var(--accent-color);
  color: #111111;
}

/* --- Navigation Header --- */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 0.75rem 6.5%;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 2.5rem;
  z-index: 100;
  background: var(--bg);
  transition: all var(--transition-speed) ease;
  font-family: var(--font-ui);
}

header .logo {
  display: none;
}

.logo {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: -0.03em;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--accent-color);
}

nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--text-sec);
  font-weight: 500;
  font-size: 0.9rem;
  transition: color 0.2s ease;
  position: relative;
  padding: 0.2rem 0;
}

nav a:hover, nav a.active {
  color: var(--text);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--text);
  transition: width 0.2s ease;
}

nav a.active::after {
  width: 100%;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle, .menu-toggle {
  background: none;
  border: none;
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  background-color: var(--bg-card);
}

.theme-toggle:hover, .menu-toggle:hover {
  transform: scale(1.05);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.menu-toggle svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 1px;
}

.menu-toggle {
  display: none; /* Hidden on desktop */
}

.theme-toggle .sun-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
  display: block;
}

/* --- Layout Grid / Section Structures --- */
main {
  padding-top: 4.5rem;
}

.specimen-section {
  padding: 5rem 6.5% 6rem;
}

/* --- 1. Introduction Section --- */
.specimen-main-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(3.5rem, 13vw, 11rem);
  line-height: 0.88;
  letter-spacing: -0.03em;
  margin-bottom: 4rem;
}

.intro-columns {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1.25fr;
  gap: 4.5rem;
  align-items: start;
}

.intro-tagline {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.version-tag {
  font-size: 0.8rem;
  color: var(--text-sec);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.intro-btn {
  display: inline-flex;
  align-items: center;
  background-color: var(--text);
  color: var(--bg);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  margin-top: 1.75rem;
  transition: transform 0.15s ease, opacity 0.2s ease, background-color 0.2s ease;
}

.intro-btn:hover {
  opacity: 0.95;
  transform: translateY(-2px);
}

.intro-btn:active {
  transform: translateY(0);
}

.intro-lead {
  font-size: 1.5rem;
  line-height: 1.45;
  color: var(--text);
  font-weight: 400;
  letter-spacing: -0.01em;
}

.intro-body {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-sec);
}

.core-alphabet-display {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 4rem;
  border-top: 1px dashed var(--border);
  padding-top: 3.5rem;
}

.alphabet-line {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 8vw, 6.5rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
  white-space: normal;
  word-break: break-all;
  overflow-wrap: break-word;
}

/* Custom weight adjustments in specimen text */
.weight-light { font-weight: 300; }
.weight-bold { font-weight: 700; }
.weight-italic { font-style: italic; }

.usage-license-block {
  margin-top: 5rem;
  border-top: 1px dashed var(--border);
  padding-top: 4rem;
}

.usage-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 1rem;
}

.usage-body {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-sec);
}

.code-box {
  background-color: var(--bg-card);
  padding: 0.75rem 1rem;
  border-radius: 6px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--text);
  margin-top: 1rem;
  overflow-x: auto;
  max-width: 100%;
  -webkit-overflow-scrolling: touch;
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}

.code-box::-webkit-scrollbar {
  display: none; /* Chrome, Safari, Opera */
}

/* --- 2. Live Testing Playground Bar --- */
.live-input-box {
  background: var(--bg-card);
  border: none;
  padding: 1.25rem 2rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 4rem;
  transition: background-color var(--transition-speed) ease;
}

.live-input-box:focus-within {
  background-color: var(--border);
}

.live-input-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-sec);
}

#live-specimen-input {
  background: transparent;
  border: none;
  outline: none;
  font-size: 1.4rem;
  color: var(--text);
  font-family: var(--font-serif); /* Cooper font is nice to show style preview in input */
  width: 100%;
}

/* --- Specimens Font Size Ramp --- */
.ramp-container {
  display: flex;
  flex-direction: column;
  border-top: 1px dashed var(--border);
  margin-bottom: 5rem;
}

.ramp-row {
  display: flex;
  flex-flow: row wrap;
  gap: 1.5rem;
  padding: 2.25rem 0;
  border-bottom: 1px dashed var(--border);
  align-items: baseline;
}

.ramp-meta {
  width: 180px;
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.ramp-text {
  flex: 1;
  min-width: 280px;
  font-family: var(--font-serif);
  outline: none;
  line-height: 1.1;
  letter-spacing: -0.01em;
  word-break: break-word;
}

.text-light { font-weight: 300; }
.text-bold { font-weight: 700; }
.text-light-italic { font-weight: 300; font-style: italic; }
.text-bold-italic { font-weight: 700; font-style: italic; }

/* Font sizes */
.font-16 { font-size: 1rem; }
.font-18 { font-size: 1.125rem; }
.font-24 { font-size: 1.5rem; }
.font-28 { font-size: 1.75rem; }
.font-32 { font-size: 2rem; }
.font-36 { font-size: 2.25rem; }
.font-48 { font-size: 3rem; }
.font-56 { font-size: 3.5rem; }
.font-72 { font-size: 4.5rem; letter-spacing: -0.02em; }
.font-84 { font-size: 5.25rem; letter-spacing: -0.03em; }
.font-96 { font-size: 6rem; letter-spacing: -0.035em; }

/* Paragraph specimen columns */
.text-block-examples {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3.5rem;
  margin-top: 2rem;
}

.column-meta {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 1.25rem;
}

.example-para {
  font-family: var(--font-serif);
  text-align: left;
}

.example-para.font-14 { font-size: 0.92rem; }
.example-para.font-16 { font-size: 1.05rem; }

.example-para.text-light { line-height: 1.7; }
.example-para.text-bold { line-height: 1.6; }
.example-para.text-light-italic { line-height: 1.6; }

/* --- 3. Yellow Accent Section: Anatomy & Comparisons --- */
.accent-section {
  padding: 6rem 6.5%;
}

.yellow-theme {
  background-color: var(--yellow-bg);
  color: var(--yellow-text);
}

.blue-theme {
  background-color: var(--blue-bg);
  color: var(--blue-text);
}

.accent-container {
  width: 100%;
  max-width: 1440px;
  margin-left: auto;
  margin-right: auto;
}

.accent-header-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.accent-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.8;
  display: block;
  margin-bottom: 0.75rem;
}

.accent-title {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.accent-desc {
  font-size: 1.1rem;
  line-height: 1.6;
  opacity: 0.9;
}

/* Feature Matrix grid */
.comparison-matrix {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr 1fr;
  border-top: 1px dashed var(--yellow-border);
}

.matrix-header-spacer {
  border-bottom: 1px dashed var(--yellow-border);
  padding: 1.5rem 0;
}

.matrix-column-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  padding: 1.5rem 2rem;
  border-bottom: 1px dashed var(--yellow-border);
}

.matrix-row-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 2rem 0;
  border-bottom: 1px dashed var(--yellow-border);
  padding-right: 2rem;
}

.matrix-item-title {
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.matrix-item-desc {
  font-size: 0.85rem;
  opacity: 0.8;
  line-height: 1.4;
}

.matrix-cell {
  padding: 2rem;
  border-bottom: 1px solid var(--yellow-border);
  font-size: clamp(6.5rem, 10vw, 9.5rem);
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.font-cooper {
  font-family: var(--font-serif);
}

/* --- 4. Green Accent Section: All Glyphs Grid --- */
.green-theme {
  background-color: var(--green-bg);
  color: var(--green-text);
}

.accent-label-green {
  font-size: 0.8rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.1em;
  opacity: 0.8;
  display: block;
  margin-bottom: 0.75rem;
}

.glyphs-section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--green-border);
  padding-bottom: 2.5rem;
  margin-bottom: 3.5rem;
}

.glyphs-headline {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
}

/* Filters */
.glyphs-filter-pills {
  display: flex;
  gap: 0.5rem;
  background: rgba(17, 17, 17, 0.05);
  padding: 0.25rem;
  border-radius: 8px;
}

.filter-pill {
  background: none;
  border: none;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.55rem 1.25rem;
  border-radius: 6px;
  cursor: pointer;
  color: var(--green-text);
  transition: all 0.2s ease;
}

.filter-pill:hover {
  opacity: 0.8;
}

.filter-pill.active {
  background: #111111;
  color: var(--green-bg);
}

/* Split screen viewer */
.glyphs-interactive-layout {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 5rem;
  align-items: start;
}

/* Left sidebar panel - Clean, borderless, big preview */
.glyphs-preview-side {
  position: sticky;
  top: 7rem;
  background: none;
  border: none;
  border-radius: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.giant-glyph-preview {
  font-family: var(--font-serif);
  font-size: 15rem;
  font-weight: 700;
  line-height: 1;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2.5rem;
  transition: font-weight 0.2s, font-style 0.2s;
  user-select: none;
}

/* Style selector buttons inside the preview */
.glyph-style-selector {
  display: flex;
  gap: 0.5rem;
  width: 100%;
  margin-bottom: 2.5rem;
  background: rgba(17, 17, 17, 0.05);
  padding: 0.25rem;
  border-radius: 8px;
}

.glyph-style-btn {
  flex: 1;
  background: none;
  border: none;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--green-text);
  padding: 0.55rem 0.25rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.glyph-style-btn:hover {
  opacity: 0.8;
}

.glyph-style-btn.active {
  background: #111111;
  color: var(--green-bg);
}

.glyph-metadata-box {
  width: 100%;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.metadata-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed rgba(17, 17, 17, 0.15);
  padding-bottom: 0.5rem;
  font-size: 0.85rem;
}

.meta-label {
  opacity: 0.7;
  font-weight: 500;
}

.meta-value {
  font-weight: 700;
  text-align: right;
  word-break: break-all;
}

.copy-glyph-btn {
  background: #111111;
  color: var(--green-bg);
  border: none;
  width: 100%;
  padding: 0.85rem;
  border-radius: 6px;
  font-family: var(--font-ui);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s ease, opacity 0.2s;
}

.copy-glyph-btn:hover {
  opacity: 0.9;
}

.copy-glyph-btn:active {
  transform: scale(0.98);
}

/* Right grid table */
.glyphs-grid-side {
  width: 100%;
}

.glyphs-grid-table {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  border-top: 1px solid var(--green-border);
  border-left: 1px solid var(--green-border);
  background: rgba(17, 17, 17, 0.02);
}

.glyph-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  border-bottom: 1px solid var(--green-border);
  border-right: 1px solid var(--green-border);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.glyph-cell:hover {
  background: #111111;
  color: var(--green-bg);
}

.glyph-cell.active {
  background: #111111;
  color: var(--green-bg);
}



/* --- 2.5 Interactive Type Tester --- */
.tester-container {
  width: 100%;
}

.tester-header-block {
  margin-bottom: 2.5rem;
}

.tester-section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin: 0.5rem 0 1rem;
}

.tester-subtitle {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-sec);
  max-width: 650px;
}

.tester-workspace {
  display: grid;
  grid-template-columns: 350px 1px 1fr;
  gap: 3.5rem;
  align-items: stretch;
}

.tester-divider {
  width: 1px;
  background-color: var(--border);
  align-self: stretch;
}

.tester-controls {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.25rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.control-group {
  display: flex;
  flex-direction: column;
}

.control-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-sec);
  margin-bottom: 0.75rem;
}

.preset-buttons {
  display: flex;
  gap: 0.5rem;
}

.preset-btn {
  flex: 1;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  background: transparent;
  color: var(--text-sec);
  border: 1px solid var(--border);
  padding: 0.6rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.preset-btn:hover {
  border-color: var(--text-sec);
  color: var(--text);
}

.preset-btn.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.style-select-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.tester-style-btn {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 600;
  background: transparent;
  color: var(--text-sec);
  border: 1px solid var(--border);
  padding: 0.7rem 0.5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tester-style-btn:hover {
  border-color: var(--text-sec);
  color: var(--text);
}

.tester-style-btn.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.compare-all-btn {
  width: 100%;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: transparent;
  color: var(--text);
  border: 1px dashed var(--border);
  padding: 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: all 0.2s ease;
}

.compare-all-btn:hover {
  border-style: solid;
  border-color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

[data-theme="light"] .compare-all-btn:hover {
  background: rgba(0, 0, 0, 0.03);
}

.compare-all-btn.active {
  background: var(--text);
  color: var(--bg);
  border-style: solid;
  border-color: var(--text);
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

.slider-header .control-label {
  margin-bottom: 0;
}

.slider-val {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

/* Custom range inputs */
.tester-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
}

.tester-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.tester-slider::-webkit-slider-thumb:hover {
  transform: scale(1.25);
}

.control-row {
  display: flex;
  gap: 1rem;
}

.control-group.half-width {
  flex: 1;
}

.align-buttons, .contrast-selector {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.align-btn, .contrast-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-sec);
  padding: 0.6rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
}

.align-btn:not(:last-child), .contrast-btn:not(:last-child) {
  border-right: 1px solid var(--border);
}

.align-btn:hover, .contrast-btn:hover {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

[data-theme="light"] .align-btn:hover, [data-theme="light"] .contrast-btn:hover {
  background: rgba(0, 0, 0, 0.03);
}

.align-btn.active, .contrast-btn.active {
  background: var(--text);
  color: var(--bg);
}

/* Preview Workspace Area */
.tester-preview-container {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  min-height: 465px;
  display: flex;
  position: relative;
  overflow: hidden;
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* Localized Contrast Overrides */
.tester-preview-container[data-contrast="paper-light"] {
  background: #fbfaf7 !important;
  border-color: #e2decb !important;
}

.tester-preview-container[data-contrast="paper-light"] .tester-edit-box {
  color: #1c1a17 !important;
}

.tester-preview-container[data-contrast="paper-light"] .compare-meta {
  color: #8b8577 !important;
}

.tester-preview-container[data-contrast="paper-light"] .compare-item {
  border-color: #e2decb !important;
}

.tester-preview-container[data-contrast="paper-dark"] {
  background: #0d0d0d !important;
  border-color: #222222 !important;
}

.tester-preview-container[data-contrast="paper-dark"] .tester-edit-box {
  color: #f5eedc !important;
}

.tester-preview-container[data-contrast="paper-dark"] .compare-meta {
  color: #555555 !important;
}

.tester-preview-container[data-contrast="paper-dark"] .compare-item {
  border-color: #222222 !important;
}

.tester-edit-box {
  width: 100%;
  min-height: 400px;
  padding: 3rem;
  font-family: var(--font-serif);
  font-size: var(--preview-size, 48px);
  line-height: var(--preview-lh, 1.3);
  letter-spacing: var(--preview-ls, -0.02em);
  text-align: var(--preview-align, left);
  font-weight: var(--preview-weight, 700);
  font-style: var(--preview-style, normal);
  color: var(--text);
  outline: none;
  white-space: pre-wrap;
  word-break: break-word;
  transition: font-size 0.1s ease, line-height 0.1s ease, letter-spacing 0.1s ease;
}

.tester-compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  width: 100%;
  padding: 3rem;
  background: transparent;
}

.compare-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.compare-meta {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.compare-text {
  font-family: var(--font-serif);
  font-size: var(--preview-size, 32px);
  line-height: var(--preview-lh, 1.3);
  letter-spacing: var(--preview-ls, -0.02em);
  text-align: var(--preview-align, left);
  word-break: break-word;
}

.compare-item.style-light .compare-text {
  font-weight: 300;
  font-style: normal;
}

.compare-item.style-light-italic .compare-text {
  font-weight: 300;
  font-style: italic;
}

.compare-item.style-bold .compare-text {
  font-weight: 700;
  font-style: normal;
}

.compare-item.style-bold-italic .compare-text {
  font-weight: 700;
  font-style: italic;
}

/* Blue Theme specific overrides for Type Tester (flat, card-less aesthetic matching yellow/green accent sections) */
.blue-theme .tester-controls {
  background: none;
  border: none;
  border-radius: 0;
  padding: 0;
}

.blue-theme .control-label {
  color: rgba(17, 17, 17, 0.6);
  font-weight: 700;
}

.blue-theme .slider-val {
  color: #111111;
  font-weight: 700;
}

.blue-theme .tester-slider {
  background: rgba(17, 17, 17, 0.15);
}

.blue-theme .tester-slider::-webkit-slider-thumb {
  background: #111111;
}

.blue-theme .preset-btn, 
.blue-theme .tester-style-btn, 
.blue-theme .align-btn, 
.blue-theme .contrast-btn {
  border-color: rgba(17, 17, 17, 0.2);
  color: rgba(17, 17, 17, 0.85);
  background: transparent;
}

.blue-theme .preset-btn:hover, 
.blue-theme .tester-style-btn:hover, 
.blue-theme .align-btn:hover, 
.blue-theme .contrast-btn:hover {
  border-color: #111111;
  color: #111111;
  background: rgba(17, 17, 17, 0.05);
}

.blue-theme .preset-btn.active, 
.blue-theme .tester-style-btn.active, 
.blue-theme .align-btn.active, 
.blue-theme .contrast-btn.active {
  background: #111111;
  color: var(--blue-bg);
  border-color: #111111;
}

.blue-theme .align-buttons, 
.blue-theme .contrast-selector {
  border-color: rgba(17, 17, 17, 0.2);
  background: transparent;
}

.blue-theme .align-btn:not(:last-child), 
.blue-theme .contrast-btn:not(:last-child) {
  border-right: 1px solid rgba(17, 17, 17, 0.2);
}

.blue-theme .compare-all-btn {
  border-color: rgba(17, 17, 17, 0.2);
  color: #111111;
  background: transparent;
}

.blue-theme .compare-all-btn:hover {
  border-style: solid;
  border-color: #111111;
  background: rgba(17, 17, 17, 0.05);
}

.blue-theme .compare-all-btn.active {
  background: #111111;
  color: var(--blue-bg);
  border-color: #111111;
}

/* Flat preview container */
.blue-theme .tester-preview-container {
  background: none;
  border: none;
  border-radius: 0;
  min-height: unset;
  padding: 0;
}

.blue-theme .tester-edit-box {
  color: #111111;
  background: none;
  border: none;
  padding: 0;
  min-height: 350px;
}

/* Keep the card background ONLY for paper contrast modes inside blue theme */
.blue-theme .tester-preview-container[data-contrast="paper-light"] {
  background: #fbfaf7 !important;
  border: 1px solid #e2decb !important;
  border-radius: 12px;
  padding: 2.5rem;
}

.blue-theme .tester-preview-container[data-contrast="paper-light"] .tester-edit-box {
  padding: 0;
  min-height: 300px;
}

.blue-theme .tester-preview-container[data-contrast="paper-dark"] {
  background: #0d0d0d !important;
  border: 1px solid #222222 !important;
  border-radius: 12px;
  padding: 2.5rem;
}

.blue-theme .tester-preview-container[data-contrast="paper-dark"] .tester-edit-box {
  padding: 0;
  min-height: 300px;
}

.blue-theme .tester-compare-grid {
  padding: 0;
}

.blue-theme .compare-item {
  border-color: rgba(17, 17, 17, 0.15);
  background: rgba(17, 17, 17, 0.02);
}

.blue-theme .compare-meta {
  color: rgba(17, 17, 17, 0.5);
}

.blue-theme .compare-text {
  color: #111111;
}

.blue-theme .tester-divider {
  width: 0;
  border-left: 1px dashed rgba(17, 17, 17, 0.25);
}


/* --- 5. Weights Showcase Section --- */
.orange-theme {
  background-color: var(--orange-bg);
  color: var(--orange-text);
}

.weights-list {
  display: flex;
  flex-direction: column;
}

.weight-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 2rem;
  padding: 2.25rem 0;
  border-bottom: 1px dashed var(--border);
  align-items: center;
}

.orange-theme .weight-row {
  border-bottom-color: var(--orange-border);
}

.weight-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.weight-num {
  font-family: var(--font-ui);
  font-size: 1.5rem;
  font-weight: 700;
  color: inherit;
  line-height: 1;
}

.weight-name {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.75;
}

.weight-previews {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
}

.weight-col {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3.2vw, 2.5rem);
  line-height: 1.15;
  color: inherit;
  word-break: break-word;
}

/* --- 2.5 Teal Accent Section: Specimen Ramp Theme --- */
.teal-theme {
  background-color: var(--teal-bg);
  color: var(--teal-text);
}

.teal-theme .ramp-container {
  border-top-color: var(--teal-border);
}

.teal-theme .ramp-row {
  border-bottom-color: var(--teal-border);
}

.teal-theme .ramp-meta {
  color: inherit;
  opacity: 0.7;
}

.teal-theme .column-meta {
  color: inherit;
  opacity: 0.7;
}


/* --- 5.5 Developer Integration (Usage) Section --- */
.purple-theme {
  background-color: var(--purple-bg);
  color: var(--purple-text);
}

.usage-grid-flat {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3.5rem 5rem;
  margin-top: 3.5rem;
}

.usage-col {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  min-width: 0;
}

.usage-col-title {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 700;
  border-bottom: 1px dashed var(--purple-border);
  padding-bottom: 0.75rem;
  margin-bottom: 0.25rem;
}

.usage-col-text {
  font-size: 0.95rem;
  line-height: 1.5;
  opacity: 0.85;
}

.usage-code-block {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.code-label {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.7;
}

.usage-col .code-box {
  background-color: rgba(17, 17, 17, 0.9);
  color: #ffffff;
  border: 1px solid rgba(17, 17, 17, 0.2);
  margin-top: 0;
  padding: 1rem;
  border-radius: 8px;
}

.purple-theme .intro-btn {
  background-color: #111111;
  color: var(--purple-bg);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.65rem 1.25rem;
  border-radius: 6px;
  align-self: flex-start;
  transition: transform 0.15s ease, opacity 0.2s ease, background-color 0.2s ease;
}

.purple-theme .intro-btn:hover {
  opacity: 0.95;
  transform: translateY(-2px);
  background-color: #222222;
}


/* --- 6. FAQ Block --- */
.faq-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4.5rem;
  align-items: start;
}

.faq-sidebar {
  position: sticky;
  top: 120px;
}

.faq-section-title {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  margin: 0.5rem 0 1.25rem;
}

.faq-intro-text {
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-sec);
}

.faq-accordion-container {
  display: flex;
  flex-direction: column;
}

.accordion-item {
  border-bottom: 1px dashed var(--border);
}

.accordion-item:first-child {
  border-top: 1px dashed var(--border);
}

.accordion-header {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.75rem 0;
  background: transparent;
  border: none;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  transition: color 0.2s ease;
}

.accordion-header:hover {
  color: var(--accent-color);
}

.accordion-num {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

.accordion-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
}

.accordion-icon {
  margin-left: auto;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s ease;
}

.accordion-header:hover .accordion-icon {
  color: var(--text);
}

.accordion-header[aria-expanded="true"] .accordion-icon {
  transform: rotate(135deg);
  color: var(--text);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

.accordion-content-inner {
  padding-left: 2.8rem;
  padding-bottom: 1.75rem;
}

.accordion-content p {
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-sec);
  max-width: 600px;
}

.accordion-content code {
  font-family: monospace;
  font-size: 0.85rem;
  background: var(--border);
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  color: var(--text);
}


/* --- Footer --- */
footer {
  background: var(--bg);
  padding: 6rem 6.5% 2.5rem;
  color: var(--text-sec);
  transition: background-color var(--transition-speed) ease, border-color var(--transition-speed) ease;
  font-family: var(--font-ui);
}

.footer-row {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1.25fr;
  gap: 5rem;
  margin-bottom: 5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-brand .logo {
  font-size: 1.8rem;
}

.footer-brand p {
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-links-col, .footer-meta-col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.footer-links-col h5, .footer-meta-col h5 {
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text);
}

.footer-links-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem 2rem;
}

.footer-links-col a {
  text-decoration: none;
  color: var(--text-sec);
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  transition: transform 0.2s ease, color 0.2s ease;
}

.footer-links-col a:hover {
  color: var(--text);
  transform: translateX(3px);
}

.footer-meta-col p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-meta-col p strong {
  color: var(--text);
}

.footer-bottom-bar {
  border-top: 1px dashed var(--border);
  padding-top: 2rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* --- Responsive Layout Adjustments --- */
@media (max-width: 1024px) {
  .specimen-section, .accent-section {
    padding: 4.5rem 4%;
  }

  .text-block-examples {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
}

@media (max-width: 992px) {
  /* Weights Showcase Section */
  .weight-row {
    grid-template-columns: 100px 1fr;
    gap: 1.5rem;
    padding: 1.75rem 0;
  }
  
  .weight-previews {
    gap: 1.5rem;
  }

  /* Usage & Integration Section */
  .usage-grid-flat {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  /* Header & Navigation */
  header {
    padding: 0.65rem 1.5rem;
    background-color: var(--bg);
    gap: 1.25rem;
  }

  .logo {
    font-size: 1.4rem;
  }

  .menu-toggle {
    display: flex; /* Show hamburger button */
  }

  nav {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    gap: 1.25rem;
    padding: 0.75rem 1.5rem 1.25rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
    z-index: 99;
    align-items: center;
  }

  header.menu-open nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  nav a {
    font-size: 1rem;
    padding: 0.5rem 0;
    width: 100%;
    text-align: center;
  }

  nav a::after {
    display: none; /* Hide hover line underline on menu */
  }

  /* Intro Section */
  .intro-columns {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .usage-license-block {
    margin-top: 3.5rem;
    padding-top: 2.5rem;
  }

  .specimen-main-title {
    font-size: clamp(3rem, 10vw, 5.5rem);
    line-height: 0.9;
    letter-spacing: -0.045em;
  }

  .intro-lead {
    font-size: 1.35rem;
    margin-bottom: 1.5rem;
  }

  /* Specimen Size Ramp */
  .ramp-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 1.75rem 0;
  }

  .ramp-meta {
    width: 100%;
    margin-bottom: 0.25rem;
  }

  .ramp-text {
    width: 100%;
    min-width: unset;
  }

  /* Scaled down font sizes for tablets */
  .font-48 { font-size: 2.2rem; }
  .font-56 { font-size: 2.6rem; }
  .font-72 { font-size: 3.2rem; }
  .font-84 { font-size: 3.8rem; }
  .font-96 { font-size: 4.2rem; }

  /* Anatomy Comparison */
  .accent-header-row {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
  }

  .accent-title, .glyphs-headline {
    font-size: 2.8rem;
    line-height: 1.0;
    letter-spacing: -0.04em;
  }

  .comparison-matrix {
    grid-template-columns: 1fr 1fr 1fr 1fr;
    border-top: none;
  }

  .matrix-header-spacer, .matrix-column-title {
    display: none;
  }

  .matrix-row-info {
    grid-column: 1 / -1;
    padding: 1.5rem 0 0.5rem;
    border-bottom: none;
  }

  .matrix-cell {
    padding: 0.5rem 0 2rem;
    font-size: 4.5rem;
    border-bottom: 1px solid var(--yellow-border);
  }

  /* Glyphs Section */
  .glyphs-interactive-layout {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .glyphs-preview-side {
    position: static;
    width: 100%;
    align-items: center;
  }

  .giant-glyph-preview {
    font-size: 11rem;
    height: 180px;
    margin-bottom: 1.5rem;
  }

  .glyphs-section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
    padding-bottom: 1.75rem;
    margin-bottom: 2.5rem;
  }

  .glyphs-filter-pills {
    width: 100%;
    flex-wrap: wrap;
    justify-content: center;
  }

  .glyphs-filter-pills .filter-pill {
    flex: 1;
    min-width: 65px;
    text-align: center;
    padding: 0.55rem 0.25rem;
  }

  /* Interactive Tester */
  .tester-workspace {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .tester-divider {
    width: 100%;
    height: 1px;
    background-color: var(--border);
    align-self: auto;
  }

  .blue-theme .tester-divider {
    border-left: none;
    border-top: 1px dashed rgba(17, 17, 17, 0.25);
    width: 100%;
    height: 0;
    margin: 0.5rem 0;
    align-self: auto;
  }

  .tester-controls {
    padding: 1.75rem 1.5rem;
  }

  .tester-preview-container {
    min-height: 350px;
  }

  .tester-edit-box {
    padding: 2rem;
  }

  /* FAQ Accordion & Footer */
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .faq-sidebar {
    position: static;
  }

  .footer-row {
    grid-template-columns: 1fr;
    gap: 3.5rem;
    text-align: center;
  }

  .footer-brand, .footer-links-col, .footer-meta-col {
    align-items: center;
  }

  .footer-links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 2rem;
  }

  .footer-brand p {
    max-width: 480px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  /* Weights Showcase Section */
  .weight-row {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 1.5rem 0;
  }
  
  .weight-info {
    flex-direction: row;
    align-items: baseline;
    gap: 0.75rem;
  }
  
  .weight-num {
    font-size: 1.25rem;
  }
  
  .weight-previews {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .specimen-section, .accent-section {
    padding: 3.5rem 1.25rem;
  }

  .text-block-examples {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .alphabet-line {
    font-size: 3rem;
    line-height: 1.25;
  }

}

@media (max-width: 480px) {
  .specimen-main-title {
    font-size: clamp(2.5rem, 12vw, 3.8rem);
    line-height: 0.9;
    letter-spacing: -0.04em;
  }

  .intro-lead {
    font-size: 1.2rem;
  }

  .accent-title, .glyphs-headline {
    font-size: 2.2rem;
  }

  .faq-section-title {
    font-size: 1.8rem;
  }

  .tester-section-title {
    font-size: 2rem;
  }

  .tester-edit-box {
    padding: 1.5rem;
  }

  .tester-compare-grid {
    grid-template-columns: 1fr;
    padding: 1.5rem;
    gap: 1.25rem;
  }

  .accordion-content-inner {
    padding-left: 2rem;
  }

  .alphabet-line {
    font-size: 2.2rem;
  }

  /* Smaller fonts for small phones */
  .font-48 { font-size: 1.8rem; }
  .font-56 { font-size: 2.1rem; }
  .font-72 { font-size: 2.5rem; }
  .font-84 { font-size: 2.8rem; }
  .font-96 { font-size: 3.2rem; }

  .matrix-cell {
    font-size: 3.5rem;
    padding: 0.5rem 0 1.5rem;
  }

  .giant-glyph-preview {
    font-size: 8rem;
    height: 130px;
    margin-bottom: 1rem;
  }

  .glyph-style-selector {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }

  .glyph-style-btn {
    padding: 0.65rem 0.25rem;
  }

  .glyphs-grid-table {
    grid-template-columns: repeat(auto-fill, minmax(55px, 1fr));
  }

  .glyph-cell {
    font-size: 1.25rem;
  }

  footer {
    padding: 3.5rem 1.25rem 2rem;
  }
}

/* --- Lenis Smooth Scrolling CSS Helpers --- */
html.lenis, html.lenis body {
  height: auto;
}

.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

.lenis-stopped {
  overflow: hidden;
}

.lenis-scrolling iframe {
  pointer-events: none;
}