/* ==========================================================================
   LINGUISTICS SUITE PORTAL — SWISS TYPOGRAPHIC STYLE (DIE NEUE GRAPHIK)
   Aesthetics: Zero Border-Radius, Zero Drop-Shadows, Absolute Grid Discipline,
   Stark Monochromatic Contrast with Swiss Red (#E30613) Signals.
   Kinetic Animations & Interactive Visual Simulators.
   ========================================================================== */

:root {
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8F9FA;
  --bg-tertiary: #F1F3F5;
  --bg-dark: #111111;
  
  --text-primary: #111111;
  --text-secondary: #495057;
  --text-muted: #868E96;
  --text-inverse: #FFFFFF;

  --border-light: #E5E7EB;
  --border-medium: #D1D5DB;
  --border-dark: #111111;

  --swiss-red: #E30613;
  --swiss-red-hover: #B8000A;

  --font-sans: 'Noto Sans', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, monospace;

  --container-max-width: 1360px;
  --header-height: 64px;
}

/* Base Reset & Zero Decoration Rule */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
  box-shadow: none !important;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  background-color: var(--bg-primary);
  position: relative;
  width: 100%;
  padding-top: var(--header-height);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease, background-color 0.15s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

/* Scroll Progress Line Indicator */
.scroll-progress-line {
  position: fixed;
  top: calc(var(--header-height) - 1px);
  left: 0;
  height: 3px;
  background-color: var(--swiss-red);
  width: 0%;
  z-index: 1002;
  transition: width 0.08s ease-out;
  pointer-events: none;
}

/* ==========================================================================
   TYPOGRAPHY
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text-primary);
}

.mono {
  font-family: var(--font-mono);
  letter-spacing: -0.02em;
}

/* ==========================================================================
   LAYOUT GRID CONTAINER
   ========================================================================== */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}

/* ==========================================================================
   KINETIC SLIDE-IN & REVEAL ANIMATIONS
   ========================================================================== */

.slide-in-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.is-visible.slide-in-up {
  opacity: 1;
  transform: translateY(0);
}

/* Delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }
.delay-5 { transition-delay: 0.5s; }

/* ==========================================================================
   STICKY HEADER (SWISS MASTHEAD)
   ========================================================================== */

.portal-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  transition: border-color 0.2s ease;
  width: 100%;
}

.portal-header.header-scrolled {
  border-bottom: 1px solid var(--border-dark);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-unit {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-emblem-svg {
  width: 28px;
  height: 28px;
  display: block;
  flex-shrink: 0;
}

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

.brand-main {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--swiss-red);
  transition: width 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.realtime-pos-readout {
  font-size: 0.7rem;
  color: var(--text-muted);
  padding: 4px 8px;
  border: 1px solid var(--border-light);
  background-color: #FAFAFA;
}

/* Swiss Segmented Language Switcher */
.lang-switch {
  display: flex;
  border: 1px solid var(--border-dark);
  background-color: var(--bg-primary);
}

.lang-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  color: var(--text-secondary);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.lang-btn.active {
  background-color: var(--text-primary);
  color: var(--text-inverse);
}

.lang-btn:not(.active):hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

.hero-section {
  position: relative;
  min-height: calc(88vh - var(--header-height));
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-dark);
  overflow: hidden;
  background-color: var(--bg-primary);
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: auto;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 130px 0 120px 0;
  max-width: 1040px;
  pointer-events: none;
}

.hero-content a, .hero-content button {
  pointer-events: auto;
}

.hero-overline {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--swiss-red);
  margin-bottom: 24px;
}

.hero-overline::before {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  background-color: var(--swiss-red);
}

.hero-headline {
  font-size: clamp(2.4rem, 5.2vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.headline-line {
  display: block;
}

/* Swiss Kinetic Typewriter Cursor */
.typewriter-cursor {
  display: inline-block;
  width: 0.18em;
  height: 0.85em;
  background-color: var(--swiss-red);
  margin-left: 3px;
  vertical-align: -0.05em;
  animation: typewriterBlink 0.75s steps(2, start) infinite;
}

.typewriter-cursor.cursor-dark {
  background-color: var(--text-primary);
}

@keyframes typewriterBlink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.typewriter-hero {
  display: inline-block;
  min-height: 1.15em;
}

.typewriter-heading {
  display: inline-block;
  min-height: 1.15em;
}

.hero-lead {
  display: none;
}

.hero-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 820px;
  margin-bottom: 40px;
  pointer-events: auto;
}

.hero-bullet-item {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: clamp(0.95rem, 1.6vw, 1.12rem);
  font-weight: 500;
  color: var(--text-secondary);
}

.hero-bullet-item::before {
  content: '■';
  font-size: 0.65rem;
  color: var(--swiss-red);
  flex-shrink: 0;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.swiss-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 13px 26px;
  transition: all 0.2s ease;
  border: 1px solid var(--border-dark);
}

.swiss-btn-primary {
  background-color: var(--text-primary);
  color: var(--text-inverse);
}

.swiss-btn-primary:hover {
  background-color: var(--swiss-red);
  border-color: var(--swiss-red);
  color: var(--text-inverse);
}

.swiss-btn-outline {
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.swiss-btn-outline:hover {
  background-color: var(--text-primary);
  color: var(--text-inverse);
}

.btn-arrow {
  display: inline-block;
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.swiss-btn:hover .btn-arrow {
  transform: translate(3px, -3px);
}

/* ==========================================================================
   VERTICAL RULER (SCIENTIFIC ELEVATION & MEASUREMENT BAR)
   ========================================================================== */

.vertical-ruler {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 900;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  pointer-events: auto;
  user-select: none;
}

.ruler-track {
  width: 2px;
  height: 220px;
  background-color: var(--border-medium);
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.ruler-thumb {
  position: absolute;
  left: -3px;
  top: 0;
  width: 8px;
  height: 8px;
  background-color: var(--swiss-red);
  transition: top 0.1s linear;
  box-shadow: 0 0 6px rgba(227, 6, 19, 0.6);
  pointer-events: none;
}

.ruler-tick {
  width: 6px;
  height: 1px;
  background-color: var(--border-dark);
  align-self: flex-end;
}

.ruler-tick.major {
  width: 14px;
  background-color: var(--swiss-red);
}

.ruler-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ruler-step-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 4px 6px;
  border: 1px solid transparent;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  display: block;
  text-align: center;
}

.ruler-step-link:hover {
  color: var(--text-inverse);
  background-color: var(--text-primary);
  border-color: var(--text-primary);
}

.ruler-step-link.active {
  color: var(--text-inverse);
  background-color: var(--swiss-red);
  border-color: var(--swiss-red);
  transform: translateX(-4px);
  box-shadow: 0 0 8px rgba(227, 6, 19, 0.4);
}

/* ==========================================================================
   LASER SCANLINE & SECTION LEAD BANDS
   ========================================================================== */

.laser-scanline {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: rgba(0, 0, 0, 0.08);
  overflow: hidden;
  pointer-events: none;
}

.laser-scanline::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 240px;
  height: 100%;
  background: linear-gradient(90deg, transparent 0%, var(--swiss-red) 50%, #ffffff 80%, var(--swiss-red) 90%, transparent 100%);
  box-shadow: 0 0 10px var(--swiss-red);
  animation: laserBeamScan 3.6s cubic-bezier(0.2, 0.8, 0.4, 1) infinite;
}

#ipa .laser-scanline::after { animation-delay: 0.9s; }
#syntax .laser-scanline::after { animation-delay: 1.8s; }
#phonology .laser-scanline::after { animation-delay: 2.7s; }
#features .laser-scanline::after { animation-delay: 1.2s; }

@keyframes laserBeamScan {
  0% {
    transform: translateX(-260px);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  85% {
    opacity: 1;
  }
  100% {
    transform: translateX(100vw);
    opacity: 0;
  }
}

.section-lead-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 24px;
  margin-bottom: 56px;
  width: 100%;
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-lead-band.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.lead-band-tag {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  color: var(--swiss-red);
  display: flex;
  align-items: center;
  gap: 10px;
}

.lead-band-tag::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background-color: var(--swiss-red);
  animation: leadDotPulse 2s ease-in-out infinite;
}

@keyframes leadDotPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}

.lead-band-coords {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* ==========================================================================
   TOOL FOCUS SECTIONS (MONUMENTAL VERTICAL SCALE & WATERMARK TYPOGRAPHY)
   ========================================================================== */

.tool-focus-section {
  padding: 220px 0 190px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-dark);
  position: relative;
  background-color: var(--bg-primary);
  overflow: hidden;
}

.tool-focus-section.section-alt {
  background-color: #FAFAFC;
}

/* Monumental Background Watermark Typography */
.tool-bg-watermark {
  position: absolute;
  top: 36px;
  left: max(32px, calc((100% - var(--container-max-width)) / 2 + 32px));
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(3.5rem, 8vw, 9.5rem);
  line-height: 0.88;
  letter-spacing: -0.04em;
  white-space: normal;
  word-break: break-word;
  overflow-wrap: break-word;
  max-width: calc(100% - 64px);
  color: rgba(0, 0, 0, 0.032);
  pointer-events: none;
  user-select: none;
  z-index: 0;
  text-align: left;
}

.tool-focus-section .container {
  position: relative;
  z-index: 1;
}

.tool-split-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 56px;
  align-items: center;
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

.tool-split-layout.reverse-on-desktop {
  grid-template-columns: 1.15fr 1fr;
}

.tool-details-col,
.tool-visual-col {
  min-width: 0;
  max-width: 100%;
  width: 100%;
}

/* ==========================================================================
   STAGGERED BULLET SLIDE-IN ANIMATION
   ========================================================================== */

.tool-feature-list {
  list-style: none;
  margin-bottom: 36px;
  border-top: 1px solid var(--border-light);
}

.tool-feature-item,
.stagger-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--text-primary);
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1), transform 0.55s cubic-bezier(0.16, 1, 0.3, 1), color 0.2s ease;
}

.tool-feature-item::before,
.stagger-item::before {
  content: '■';
  font-size: 0.6rem;
  color: var(--swiss-red);
  transition: transform 0.25s ease;
}

/* Triggered directly when feature list is visible */
.tool-feature-list.is-visible .tool-feature-item,
.tool-feature-list.is-visible .stagger-item {
  opacity: 1;
  transform: translateX(0);
}

.tool-feature-item:hover,
.stagger-item:hover {
  color: var(--swiss-red);
  transform: translateX(6px) !important;
}

.tool-feature-item:hover::before,
.stagger-item:hover::before {
  transform: scale(1.4);
}

.tool-feature-list.is-visible .tool-feature-item:nth-child(1),
.tool-feature-list.is-visible .stagger-item:nth-child(1) { transition-delay: 0.08s; }

.tool-feature-list.is-visible .tool-feature-item:nth-child(2),
.tool-feature-list.is-visible .stagger-item:nth-child(2) { transition-delay: 0.16s; }

.tool-feature-list.is-visible .tool-feature-item:nth-child(3),
.tool-feature-list.is-visible .stagger-item:nth-child(3) { transition-delay: 0.24s; }

.tool-feature-list.is-visible .tool-feature-item:nth-child(4),
.tool-feature-list.is-visible .stagger-item:nth-child(4) { transition-delay: 0.32s; }

.tool-feature-list.is-visible .tool-feature-item:nth-child(5),
.tool-feature-list.is-visible .stagger-item:nth-child(5) { transition-delay: 0.40s; }

/* Metrics Counter Box */
.metrics-strip {
  display: flex;
  gap: 20px;
  margin-bottom: 28px;
  padding: 12px 16px;
  background-color: #FAFAFA;
  border: 1px solid var(--border-light);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.metrics-strip.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.metric-item {
  display: flex;
  flex-direction: column;
}

.metric-val {
  font-family: var(--font-mono);
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--swiss-red);
  line-height: 1;
}

.metric-lbl {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 4px;
}

.tool-index-tag {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--swiss-red);
  margin-bottom: 16px;
}

.tool-header-group {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 16px;
}

.tool-icon-box {
  width: 52px;
  height: 52px;
  border: 1px solid var(--border-dark);
  background-color: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.tool-icon-box img {
  width: 30px;
  height: 30px;
}

.tool-title {
  font-size: clamp(1.9rem, 3.2vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.tool-subtitle {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--swiss-red);
  display: block;
  margin-top: 4px;
}

/* Built For / Developer Statement (Subtle, Clean & Integrated Typography) */
.tool-built-for {
  margin-top: 0;
  margin-bottom: 24px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.built-for-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--swiss-red);
  flex-shrink: 0;
}

.built-for-text {
  font-family: var(--font-sans);
  color: var(--text-secondary);
}



.tool-action-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   VISUAL MONITOR FRAME (STABLE, ROBUST, PIXEL-PERFECT)
   ========================================================================== */

.visual-monitor-frame {
  border: 1px solid var(--border-dark);
  background-color: var(--bg-primary);
  overflow: hidden;
  position: relative;
  width: 100%;
}

.monitor-header {
  background-color: var(--bg-dark);
  color: var(--text-inverse);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--border-dark);
}

.monitor-indicators-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Real-time 8-Segment LED VU Meter */
.vu-meter-container {
  display: flex;
  gap: 2px;
  align-items: center;
  background-color: #000000;
  padding: 3px 6px;
  border: 1px solid #333333;
}

.vu-led {
  width: 4px;
  height: 12px;
  background-color: #1F2937;
  transition: background-color 0.05s ease;
}

.vu-led.lit {
  background-color: #10B981;
}

.vu-led.yellow.lit {
  background-color: #F59E0B;
}

.vu-led.red.lit {
  background-color: #E30613;
}

.monitor-badge {
  background-color: var(--swiss-red);
  padding: 2px 8px;
  color: #FFFFFF;
}

.monitor-footer {
  background-color: var(--bg-secondary);
  padding: 10px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-top: 1px solid var(--border-light);
}

.monitor-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  background-color: #10B981;
  display: inline-block;
  animation: pulseIndicator 1.8s infinite;
}

@keyframes pulseIndicator {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.canvas-container {
  width: 100%;
  height: 230px;
  background-color: #111111;
  position: relative;
  overflow: hidden;
}

/* ==========================================================================
   AUTHENTIC APP MINI TOOLBAR (COMMON FOR SIMULATORS)
   ========================================================================== */

.app-mini-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 12px;
  background-color: #FAFAFA;
  border-bottom: 1px solid var(--border-medium);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  gap: 8px;
  flex-wrap: wrap;
}

.mini-toolbar-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.mini-tool-btn {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-dark);
  padding: 3px 7px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
  line-height: 1.2;
}

.mini-tool-btn:hover {
  background-color: var(--text-primary);
  color: var(--text-inverse);
}

.mini-tool-btn.active-state {
  background-color: var(--swiss-red);
  color: #FFFFFF;
  border-color: var(--swiss-red);
}

.mini-tool-btn.rec-btn {
  color: var(--swiss-red);
  border-color: var(--swiss-red);
}

.mini-tool-btn.rec-btn:hover {
  background-color: var(--swiss-red);
  color: #FFFFFF;
}

.mini-tool-btn.btn-export-highlight {
  background-color: #111111;
  color: #FFFFFF;
}

.mini-tool-tag {
  color: var(--text-muted);
  font-weight: 700;
  margin-right: 2px;
}

.mini-preset-tag {
  color: var(--text-secondary);
  font-weight: 600;
  background-color: var(--bg-secondary);
  padding: 2px 6px;
  border: 1px solid var(--border-light);
}

.mini-badge-active {
  background-color: rgba(227, 6, 19, 0.08);
  border: 1px solid rgba(227, 6, 19, 0.3);
  color: var(--swiss-red);
  padding: 2px 5px;
  font-weight: 700;
}

/* ==========================================================================
   DEMO 1: ACOUSTIC ANNOTATOR (MINIMAP + MULTI-TIER + PRAAT PLAYBARS)
   ========================================================================== */

.demo-annotator-minimap-wrap {
  width: 100%;
  height: 22px;
  background-color: #1A1A1A;
  position: relative;
  border-bottom: 1px solid #333333;
}

.demo-annotator-minimap-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.minimap-viewport-slider {
  position: absolute;
  top: 1px;
  height: 20px;
  width: 38%;
  left: 20%;
  border: 1px solid var(--swiss-red);
  background-color: rgba(227, 6, 19, 0.15);
  pointer-events: none;
  transition: left 0.1s linear;
}

.praat-playbars {
  display: flex;
  flex-direction: column;
  background-color: #E5E7EB;
  border-top: 1px solid var(--border-dark);
}

.playbar-segment {
  border-bottom: 1px solid #D1D5DB;
  padding: 3px 10px;
  background-color: #F3F4F6;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: #374151;
  display: flex;
  align-items: center;
  transition: background-color 0.15s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.playbar-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background-color: rgba(37, 99, 235, 0.25);
  pointer-events: none;
  transition: width 0.05s linear;
}

.playbar-label {
  position: relative;
  z-index: 2;
}

.playbar-segment:hover {
  background-color: #E5E7EB;
}

.playbar-segment:last-child {
  border-bottom: none;
}

.playbar-segment.sel-segment {
  background-color: #DBEAFE;
  color: #1E40AF;
  border-left: 3px solid #2563EB;
}

.playbar-segment.word-segment {
  background-color: #F3F4F6;
}

.playbar-segment.total-segment {
  background-color: #E5E7EB;
}

/* ==========================================================================
   DEMO 2: IPA KEYBOARD & PHONETIC MATRIX (AUTHENTIC APP UI)
   ========================================================================== */

.demo-ipa-wrapper {
  padding: 12px 16px;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.demo-ipa-input-panel {
  display: flex;
  gap: 12px;
  background-color: #FAFAFA;
  border: 1px solid var(--border-dark);
  padding: 10px 14px;
}

.demo-ipa-display-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.demo-ipa-meta-line {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.demo-ipa-text-box {
  display: flex;
  align-items: center;
  font-family: var(--font-sans);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
}

.demo-ipa-action-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  align-self: center;
}

.mini-ipa-act-btn {
  padding: 4px 6px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  border: 1px solid var(--border-dark);
  background-color: #FFFFFF;
  cursor: pointer;
  line-height: 1.1;
  transition: all 0.15s ease;
}

.mini-ipa-act-btn:hover {
  background-color: var(--text-primary);
  color: var(--text-inverse);
}

.mini-ipa-act-btn.btn-black {
  background-color: #111111;
  color: #FFFFFF;
}

.mini-ipa-act-btn.act-highlight {
  background-color: var(--swiss-red) !important;
  color: #FFFFFF !important;
  border-color: var(--swiss-red) !important;
}

.demo-status-ticker {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  padding: 4px 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  min-height: 28px;
}

.demo-ticker-sym {
  color: var(--swiss-red);
  font-weight: 800;
  font-size: 0.85rem;
  transition: all 0.2s ease;
}

.demo-ticker-text {
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.demo-ipa-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-dark);
  gap: 2px;
}

.demo-tab-btn {
  background-color: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  padding: 4px 10px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.demo-tab-btn.active {
  background-color: #111111;
  color: #FFFFFF;
  border-color: #111111;
}

.demo-ipa-matrix-wrap {
  overflow-x: auto;
  border: 1px solid var(--border-dark);
}

.demo-ipa-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-align: center;
  background-color: #FFFFFF;
}

.demo-ipa-table th {
  background-color: #F3F4F6;
  border: 1px solid #E5E7EB;
  padding: 3px 4px;
  font-weight: 700;
  font-size: 0.62rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.demo-ipa-table th.th-manner {
  text-align: left;
  padding-left: 6px;
  width: 90px;
  background-color: #E5E7EB;
  color: #111111;
}

.demo-ipa-table td {
  border: 1px solid #E5E7EB;
  padding: 2px;
  vertical-align: middle;
  height: 26px;
}

.demo-ipa-table td.td-manner {
  text-align: left;
  padding-left: 6px;
  font-weight: 600;
  font-size: 0.62rem;
  background-color: #FAFAFA;
  color: var(--text-primary);
  white-space: nowrap;
}

.demo-matrix-key {
  border: 1px solid #D1D5DB;
  background-color: #FFFFFF;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 1px 5px;
  margin: 0 1px;
  cursor: pointer;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  line-height: 1;
}

.demo-matrix-key:hover {
  border-color: var(--text-primary);
  background-color: #F3F4F6;
}

.demo-matrix-key.key-active {
  background-color: var(--swiss-red) !important;
  color: #FFFFFF !important;
  border-color: var(--swiss-red) !important;
  transform: scale(0.92);
  box-shadow: 0 0 8px rgba(227, 6, 19, 0.4);
}

.demo-tone-strip {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px 10px;
  background-color: #FAFAFA;
  border: 1px solid var(--border-light);
  overflow-x: auto;
}

.tone-strip-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
  margin-right: 4px;
}

.demo-tone-btn {
  border: 1px solid var(--border-dark);
  background-color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s cubic-bezier(0.16, 1, 0.3, 1);
}

.demo-tone-btn.tone-special {
  color: var(--swiss-red);
}

.demo-tone-btn:hover {
  background-color: var(--text-primary);
  color: #FFFFFF;
}

.demo-tone-btn.key-active {
  background-color: var(--swiss-red) !important;
  color: #FFFFFF !important;
  border-color: var(--swiss-red) !important;
  transform: scale(0.92);
  box-shadow: 0 0 8px rgba(227, 6, 19, 0.4);
}

/* ==========================================================================
   DEMO 3: SYNTAX TREE EDITOR (AUTHENTIC SPLIT-PANE UI)
   ========================================================================== */

.demo-tree-split-container {
  display: grid;
  grid-template-columns: 200px 1fr;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-dark);
  min-height: 250px;
}

.demo-tree-editor-pane {
  background-color: #FAFAFA;
  border-right: 1px solid var(--border-medium);
  display: flex;
  flex-direction: column;
}

.demo-tree-pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 8px;
  background-color: #EEEEEE;
  border-bottom: 1px solid #E0E0E0;
}

.pane-title {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text-muted);
}

.quick-sym-strip {
  display: flex;
  gap: 2px;
}

.sym-chip {
  background-color: #FFFFFF;
  border: 1px solid #CCCCCC;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 700;
  padding: 1px 3px;
  line-height: 1;
}

.demo-tree-code-box {
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.35;
  flex: 1;
  background-color: #FFFFFF;
  overflow-y: auto;
}

.code-line {
  display: flex;
  white-space: nowrap;
  transition: background-color 0.2s ease, padding-left 0.2s ease;
  border-left: 2px solid transparent;
  padding: 1px 0;
}

.code-line.active-line {
  background-color: rgba(227, 6, 19, 0.08) !important;
  border-left-color: var(--swiss-red) !important;
  padding-left: 4px;
}

.line-num {
  width: 14px;
  color: #9CA3AF;
  user-select: none;
  font-size: 0.6rem;
}

.code-text {
  color: #111111;
}

.c-bracket {
  color: #9CA3AF;
  font-weight: 700;
}

.c-cat {
  color: var(--swiss-red);
  font-weight: 700;
}

.c-idx {
  color: #2563EB;
  font-weight: 700;
}

.c-trace {
  color: #D97706;
  font-weight: 700;
}

.c-tri {
  color: #059669;
}

.demo-tree-yield-bar {
  padding: 4px 8px;
  background-color: #F3F4F6;
  border-top: 1px solid #E5E7EB;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  display: flex;
  gap: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.yield-lbl {
  color: var(--text-muted);
  font-weight: 700;
}

.yield-val {
  color: #111111;
  font-weight: 600;
}

.demo-tree-render-pane {
  display: flex;
  flex-direction: column;
  background-color: #FFFFFF;
}

.tree-zoom-strip {
  display: flex;
  gap: 2px;
}

.zoom-btn {
  background-color: #FFFFFF;
  border: 1px solid #CCCCCC;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 700;
  padding: 1px 4px;
  line-height: 1;
}

.demo-tree-svg-canvas {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
}

.demo-tree-svg-canvas svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  aspect-ratio: 380 / 230;
}

.tree-node-group rect,
.tree-node-group text {
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.node-pulsing rect {
  stroke: var(--swiss-red) !important;
  stroke-width: 2.2px !important;
  fill: #FFF5F5 !important;
}

.node-pulsing text {
  fill: var(--swiss-red) !important;
  font-weight: 800 !important;
}

.flowing-dash-path {
  animation: dashFlow 1.2s linear infinite;
  stroke-linecap: square;
}

@keyframes dashFlow {
  0% { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -16; }
}

/* ==========================================================================
   DEMO 4: PHONOLOGICAL RULE EDITOR (AUTHENTIC APP UI)
   ========================================================================== */

.demo-rule-wrapper {
  padding: 12px 16px;
  background-color: var(--bg-primary);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.demo-rule-notation-row {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: #FAFAFA;
  border: 1px solid var(--border-dark);
  padding: 6px 10px;
  font-family: var(--font-mono);
}

.rule-input-tag {
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
}

.rule-input-field {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  color: #111111;
  flex: 1;
}

.rule-syn-chunk {
  color: #111111;
  transition: color 0.2s ease;
}

.rule-syn-op {
  color: var(--swiss-red);
  font-weight: 800;
  transition: all 0.2s ease;
}

.rule-syn-env {
  color: #4B5563;
  transition: color 0.2s ease;
}

.rule-builder-blocks {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 10px;
  background-color: #FFFFFF;
  border: 1px solid var(--border-medium);
  overflow-x: auto;
}

.builder-block {
  border: 1px solid var(--border-dark);
  padding: 4px 8px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background-color: #FAFAFA;
  flex-shrink: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.builder-block.active-step {
  border-color: var(--swiss-red) !important;
  background-color: #FFF5F5 !important;
  transform: translateY(-2px);
  box-shadow: 0 2px 8px rgba(227, 6, 19, 0.25);
}

.builder-block.active-step .block-val {
  color: var(--swiss-red) !important;
}

.block-tag {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 700;
  color: var(--text-muted);
}

.block-val {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: #111111;
  transition: color 0.2s ease;
}

.builder-op-arrow, .builder-slash, .builder-slot {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color 0.2s ease, transform 0.2s ease;
}

.builder-op-arrow {
  color: var(--swiss-red);
}

.glowing-arrow {
  display: inline-block;
  animation: pulseArrowGlow 2.2s ease-in-out infinite;
}

@keyframes pulseArrowGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); color: var(--swiss-red); }
}

.rule-sub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: 100%;
}

.spe-matrix-box {
  border: 1px solid var(--border-dark);
  background-color: #FAFAFA;
  padding: 8px 12px;
  transition: all 0.25s ease;
}

.spe-matrix-box.active-step {
  border-color: var(--swiss-red) !important;
  background-color: #FFFDFD !important;
}

.matrix-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--swiss-red);
  margin-bottom: 4px;
}

.matrix-brackets {
  border-left: 2px solid var(--border-dark);
  border-right: 2px solid var(--border-dark);
  padding: 2px 8px;
}

.matrix-content {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.matrix-feat {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 1px 4px;
  transition: all 0.2s ease;
}

.matrix-feat.active-feat {
  background-color: var(--swiss-red) !important;
  color: #FFFFFF !important;
  font-weight: 700 !important;
  transform: translateX(2px);
}

.matrix-feat.accent {
  color: var(--swiss-red);
}

.rule-latex-box {
  border: 1px solid var(--border-dark);
  background-color: #FAFAFA;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all 0.25s ease;
}

.rule-latex-box.active-step {
  border-color: var(--swiss-red) !important;
  background-color: #FFFDFD !important;
}

.latex-render-preview {
  padding: 6px 0;
  transition: all 0.2s ease;
}

.latex-render-preview.active-preview {
  transform: scale(1.03);
}

.math-rule-flex {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'Times New Roman', Times, serif;
  font-size: 0.95rem;
}

.m-term {
  font-weight: 700;
}

.m-arr {
  color: var(--swiss-red);
  font-size: 1.1rem;
}

.m-mat {
  display: flex;
  align-items: center;
  font-size: 0.65rem;
  font-family: var(--font-mono);
}

.m-mat-l, .m-mat-r {
  font-size: 1.3rem;
  font-family: 'Times New Roman', serif;
}

.m-mat-col {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
  padding: 0 2px;
  color: var(--swiss-red);
  font-weight: 700;
}

.m-slash {
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.m-env {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.latex-code-content {
  background-color: var(--bg-dark);
  color: #A3E635;
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  box-sizing: border-box;
}

.latex-code-content code {
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}


/* ==========================================================================
   FEATURES SECTION (3-COLUMN CLEAN & IMPACTFUL GRID)
   ========================================================================== */

.design-poster-section {
  padding: 100px 0;
  border-bottom: 1px solid var(--border-light);
  background-color: var(--bg-primary);
}

.poster-head {
  margin-bottom: 56px;
}

.sec-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--swiss-red);
  margin-bottom: 12px;
}

.sec-title {
  font-size: clamp(2rem, 3.5vw, 2.7rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.features-grid-3col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: var(--border-medium);
  border: 1px solid var(--border-medium);
}

.poster-block {
  background-color: var(--bg-primary);
  padding: 38px 28px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: background-color 0.25s ease, color 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.poster-block:hover {
  background-color: var(--bg-dark);
  color: #FFFFFF;
  transform: translateY(-4px);
}

.poster-block:hover .poster-keyword {
  color: #FFFFFF !important;
}

.poster-block:hover .poster-detail {
  color: rgba(255, 255, 255, 0.88);
}

.poster-block:hover .poster-bullet-item {
  color: rgba(255, 255, 255, 0.9) !important;
}

.poster-block:hover .poster-num {
  color: var(--swiss-red);
}

.poster-block:hover .poster-demo-box {
  border-color: rgba(255, 255, 255, 0.4);
  background-color: #1E1E1E;
}

.poster-block:hover .demo-tag,
.poster-block:hover .local-badge {
  color: #FFFFFF !important;
}

.poster-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--swiss-red);
  margin-bottom: 16px;
}

.poster-keyword {
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.poster-bullet-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

.poster-bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  transition: color 0.25s ease;
}

.poster-bullet-item::before {
  content: '■';
  font-size: 0.55rem;
  color: var(--swiss-red);
  margin-top: 5px;
  flex-shrink: 0;
}

.poster-detail {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  transition: color 0.25s ease;
}

.poster-demo-box {
  margin-top: auto;
  height: 56px;
  border: 1px solid var(--border-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  gap: 8px;
  transition: all 0.25s ease;
}

.demo-tag {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  transition: color 0.25s ease;
}

.demo-tag.text-white {
  color: #FFFFFF;
}

.poster-demo-box.zero-box {
  border: 2px solid var(--border-dark);
}

.poster-block:hover .poster-demo-box.zero-box {
  border-color: rgba(255, 255, 255, 0.7);
}

.poster-demo-box.red-signal-box {
  background-color: var(--bg-dark);
}

.poster-block:hover .poster-demo-box.red-signal-box {
  background-color: #252525;
  border-color: rgba(255, 255, 255, 0.4);
}

.red-signal-dot {
  width: 12px;
  height: 12px;
  background-color: var(--swiss-red);
  display: inline-block;
  animation: pulseIndicator 1.5s infinite;
}

.local-badge {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.1em;
}

/* ==========================================================================
   FOOTER (SWISS COLOPHON)
   ========================================================================== */

.portal-footer {
  background-color: var(--bg-dark);
  color: var(--text-inverse);
  padding: 80px 0 40px 0;
  border-top: 1px solid var(--border-dark);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  margin-bottom: 40px;
}

.footer-brand h2 {
  color: var(--text-inverse);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.footer-brand p {
  display: none;
}

.footer-bullets {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 520px;
}

.footer-bullet-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
}

.footer-bullet-item::before {
  content: '■';
  font-size: 0.55rem;
  color: var(--swiss-red);
  flex-shrink: 0;
}

.footer-links-group {
  display: flex;
  gap: 48px;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--swiss-red);
  margin-bottom: 16px;
}

.footer-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link-list a {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.8);
}

.footer-link-list a:hover {
  color: var(--text-inverse);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.5);
}

.btn-back-to-top {
  color: var(--text-inverse);
  font-family: var(--font-mono);
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 6px 14px;
  transition: all 0.2s ease;
}

.btn-back-to-top:hover {
  background-color: var(--swiss-red);
  border-color: var(--swiss-red);
}

/* ==========================================================================
   RESPONSIVE DESIGN (SWISS ADAPTIVE SYSTEM)
   ========================================================================== */

@media (max-width: 1080px) {
  .tool-split-layout,
  .tool-split-layout.reverse-on-desktop {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .tool-split-layout .tool-details-col {
    order: 1;
  }
  .tool-split-layout .tool-visual-col {
    order: 2;
  }
  .features-grid-3col {
    grid-template-columns: 1fr;
  }
  .vertical-ruler {
    right: 8px;
  }
}


@media (max-width: 768px) {
  :root {
    --header-height: 54px;
  }

  body {
    padding-top: var(--header-height);
  }

  .container {
    padding: 0 16px;
  }

  /* 1. Header (Clean, Compact, No-Overlap) */
  .portal-header {
    height: var(--header-height);
  }
  .brand-unit {
    gap: 10px;
  }
  .brand-emblem-svg {
    width: 22px;
    height: 22px;
  }
  .brand-main {
    font-size: 0.88rem;
    letter-spacing: 0.02em;
    line-height: 1.2;
  }
  .brand-sub {
    display: none;
  }
  .nav-links {
    display: none;
  }
  .realtime-pos-readout {
    display: none;
  }
  .lang-btn {
    padding: 4px 10px;
    font-size: 0.72rem;
  }

  /* 2. Vertical Ruler */
  .vertical-ruler {
    display: none;
  }

  /* 3. Hero Section (Balanced typography, no awkward wraps) */
  .hero-section {
    min-height: auto;
    padding: 42px 0 54px 0;
  }
  .hero-content {
    padding: 0;
    max-width: 100%;
  }
  .hero-overline {
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    margin-bottom: 14px;
    line-height: 1.4;
    word-break: break-word;
  }
  .hero-overline::before {
    width: 8px;
    height: 8px;
  }
  .hero-headline {
    font-size: 1.85rem;
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin-bottom: 20px;
    word-break: normal;
    overflow-wrap: break-word;
  }
  .hero-bullets {
    margin-bottom: 28px;
    gap: 10px;
  }
  .hero-bullet-item {
    font-size: 0.84rem;
    line-height: 1.5;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }
  .hero-actions .swiss-btn {
    width: 100%;
    justify-content: center;
    padding: 13px 20px;
  }

  /* 4. Tool Sections (Comfortable spacing & compact layout) */
  .tool-focus-section {
    padding: 100px 0 70px;
    min-height: auto;
  }
  .tool-bg-watermark {
    top: 20px;
    left: 16px;
    font-size: clamp(2.4rem, 10vw, 3.8rem);
    max-width: calc(100% - 32px);
  }
  .section-lead-band {
    margin-bottom: 28px;
    padding-bottom: 14px;
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
  .lead-band-tag {
    font-size: 0.74rem;
    letter-spacing: 0.08em;
  }
  .lead-band-tag::before {
    width: 6px;
    height: 6px;
  }
  .lead-band-coords {
    font-size: 0.64rem;
  }
  .tool-split-layout {
    gap: 32px;
  }
  .tool-index-tag {
    font-size: 0.72rem;
    margin-bottom: 12px;
  }
  .tool-header-group {
    gap: 12px;
    margin-bottom: 12px;
  }
  .tool-icon-box {
    width: 44px;
    height: 44px;
    flex-shrink: 0;
  }
  .tool-icon-box img {
    width: 24px;
    height: 24px;
  }
  .tool-title {
    font-size: 1.45rem;
  }
  .tool-subtitle {
    font-size: 0.76rem;
  }

  .tool-built-for {
    padding: 0;
    margin-top: 0;
    margin-bottom: 18px;
    font-size: 0.78rem;
    line-height: 1.5;
    flex-wrap: wrap;
    gap: 6px;
  }
  .built-for-tag {
    font-size: 0.62rem;
  }

  /* Metrics Strip (Equal 3-column grid) */
  .metrics-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    padding: 10px 10px;
    margin-bottom: 22px;
  }
  .metric-val {
    font-size: 1.15rem;
  }
  .metric-lbl {
    font-size: 0.56rem;
    letter-spacing: 0.02em;
    line-height: 1.25;
  }

  /* Feature List */
  .tool-feature-list {
    margin-bottom: 28px;
  }
  .tool-feature-item,
  .stagger-item {
    font-size: 0.82rem;
    padding: 10px 0;
    line-height: 1.5;
  }

  /* Action Buttons */
  .tool-action-group {
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }
  .tool-action-group .swiss-btn {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
  }

  /* 5. Simulators & Visual Monitors */
  .visual-monitor-frame {
    margin-top: 6px;
  }
  .monitor-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 12px;
  }
  .monitor-title {
    font-size: 0.66rem;
    line-height: 1.3;
  }
  .monitor-indicators-right {
    width: 100%;
    justify-content: space-between;
  }
  .monitor-badge {
    font-size: 0.62rem;
    padding: 2px 6px;
  }
  .monitor-footer {
    padding: 8px 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    font-size: 0.68rem;
  }

  /* 5. Simulators & Visual Monitors */
  .visual-monitor-frame {
    margin-top: 6px;
  }
  .monitor-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 10px 12px;
  }
  .monitor-title {
    font-size: 0.66rem;
    line-height: 1.3;
  }
  .monitor-indicators-right {
    width: 100%;
    justify-content: space-between;
  }
  .monitor-badge {
    font-size: 0.62rem;
    padding: 2px 6px;
  }
  .monitor-footer {
    padding: 8px 12px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    font-size: 0.68rem;
  }

  .desktop-only-tools {
    display: none !important;
  }

  /* 01 Annotator */
  .canvas-container {
    height: 180px;
  }
  #demo-annotator-canvas {
    height: 180px !important;
  }
  .praat-playbars {
    font-size: 0.58rem;
  }

  /* 02 IPA Matrix */
  .demo-ipa-input-panel {
    flex-direction: column;
    gap: 8px;
  }
  .demo-ipa-text-box {
    font-size: 1.4rem;
  }
  .demo-ipa-action-grid {
    grid-template-columns: repeat(6, 1fr);
    width: 100%;
  }
  .mini-ipa-act-btn {
    padding: 3px 2px;
    font-size: 0.58rem;
  }
  .demo-ipa-table th, .demo-ipa-table td {
    padding: 2px 1px;
    font-size: 0.6rem;
  }

  /* 03 Syntax Tree Split */
  .demo-tree-split-container {
    grid-template-columns: 1fr;
  }
  .demo-tree-editor-pane {
    border-right: none;
    border-bottom: 1px solid var(--border-medium);
  }
  .demo-tree-code-box {
    max-height: 110px;
  }
  .demo-tree-svg-canvas svg {
    max-width: 100%;
    height: auto;
  }

  /* 04 Phonological Rule Formula */
  .demo-rule-wrapper {
    padding: 10px 8px;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
  }
  .demo-rule-notation-row {
    padding: 6px 8px;
    min-width: 0;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    box-sizing: border-box;
  }
  .rule-input-field {
    min-width: 0;
    font-size: 0.78rem;
  }
  .rule-builder-blocks {
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
    width: 100%;
    padding: 6px 4px;
    gap: 5px;
    box-sizing: border-box;
  }
  .builder-block {
    padding: 3px 5px;
  }
  .block-tag {
    font-size: 0.5rem;
  }
  .block-val {
    font-size: 0.88rem;
  }
  .builder-op-arrow, .builder-slash, .builder-slot {
    font-size: 0.95rem;
  }
  .rule-sub-grid {
    grid-template-columns: 1fr;
    gap: 8px;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
  }
  .spe-matrix-box,
  .rule-latex-box {
    min-width: 0;
    max-width: 100%;
    padding: 6px 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    box-sizing: border-box;
  }
  .matrix-brackets {
    padding: 2px 4px;
  }
  .matrix-feat {
    font-size: 0.62rem;
    padding: 1px 2px;
  }
  .phonology-mini-toolbar {
    padding: 6px 8px;
    gap: 4px;
  }
  .phonology-mini-toolbar .mini-toolbar-group {
    flex-wrap: wrap;
    gap: 3px;
  }
  .phonology-mini-toolbar .mini-tool-btn {
    padding: 2px 5px;
    font-size: 0.6rem;
  }

  /* 6. Features Grid (ツールの特徴) */

  .poster-head {
    margin-bottom: 28px;
  }
  .sec-index {
    font-size: 0.75rem;
  }
  .sec-title {
    font-size: 1.6rem;
  }
  .features-grid-3col {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .poster-block {
    padding: 24px 18px;
  }
  .poster-num {
    font-size: 2.2rem;
  }
  .poster-keyword {
    font-size: 1.3rem;
  }
  .poster-bullet-item {
    font-size: 0.84rem;
  }

  /* 7. Footer */
  .footer-top {
    flex-direction: column;
    gap: 32px;
  }
  .footer-brand h2 {
    font-size: 1.45rem;
  }
  .footer-links-group {
    flex-direction: column;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
  }
}