/* LANDSLIDE — Micrographics Style Introduction Page */
/* Dense technical information poster aesthetic */
/* Enhanced with distressed typography & SVG micro-elements */

/* ============================================
   RESET & BASE
   ============================================ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --black: #000000;
  --white: #FFFFFF;
  --off-white: #FAFAFA;
  --dark-gray: #333333;
  --mid-gray: #666666;
  --light-gray: #CCCCCC;
  --border-gray: #E5E5E5;
  --faint-gray: #F2F2F2;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
  --font-sans: 'Inter', 'Helvetica Neue', 'Arial', system-ui, sans-serif;

  /* Spacing */
  --grid-unit: 8px;
  --module-padding: 24px;
  --section-gap: 0;

  /* Borders */
  --border-thin: 1px solid var(--black);
  --border-light: 1px solid var(--light-gray);
  --border-medium: 1px solid var(--mid-gray);
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--white);
  color: var(--black);
  line-height: 1.5;
  overflow-x: hidden;
}

/* ============================================
   SVG FILTERS (distressed / rough edge)
   ============================================ */
.svg-filters {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

/* ============================================
   DISTRESSED TYPOGRAPHY
   ============================================ */
.distressed {
  filter: url(#rough-edge);
  position: relative;
}

.distressed-light {
  filter: url(#rough-edge-light);
}

/* Printed/letterpress effect for key text */
.letterpress {
  text-shadow:
    0.3px 0 0 rgba(0,0,0,0.15),
    -0.2px 0 0 rgba(0,0,0,0.1),
    0 0.3px 0 rgba(0,0,0,0.1),
    0.5px 0.5px 0 rgba(0,0,0,0.05);
  position: relative;
}

/* Noise overlay for texture */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.mono {
  font-family: var(--font-mono);
}

.text-xs { font-size: 10px; letter-spacing: 0.05em; }
.text-sm { font-size: 11px; letter-spacing: 0.02em; }
.text-base { font-size: 13px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 20px; }
.text-2xl { font-size: 24px; }
.text-3xl { font-size: 32px; }
.text-4xl { font-size: 48px; }
.text-5xl { font-size: 64px; }
.text-6xl { font-size: 80px; }

.font-bold { font-weight: 700; }
.font-medium { font-weight: 500; }
.font-normal { font-weight: 400; }
.font-light { font-weight: 300; }

.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.1em; }
.tracking-wider { letter-spacing: 0.2em; }
.tracking-widest { letter-spacing: 0.3em; }

/* ============================================
   LAYOUT SYSTEM
   ============================================ */
.page-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  border-left: var(--border-thin);
  border-right: var(--border-thin);
  min-height: 100vh;
  position: relative;
}

/* Grid overlay for visual reference */
.page-wrapper::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--border-gray) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-gray) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  opacity: 0.25;
  z-index: 0;
}

/* Fine sub-grid */
.page-wrapper::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(var(--faint-gray) 0.5px, transparent 0.5px),
    linear-gradient(90deg, var(--faint-gray) 0.5px, transparent 0.5px);
  background-size: 8px 8px;
  pointer-events: none;
  opacity: 0.4;
  z-index: 0;
}

/* ============================================
   SIDE RULER / COORDINATE ANNOTATIONS
   ============================================ */
.side-ruler {
  position: absolute;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--light-gray);
  letter-spacing: 0.03em;
  line-height: 1;
  writing-mode: vertical-lr;
  text-orientation: mixed;
}

.side-ruler.left {
  left: -1px;
  top: 0;
  bottom: 0;
  width: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 0;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 39px,
    var(--light-gray) 39px,
    var(--light-gray) 40px
  );
}

.side-ruler.right {
  right: -1px;
  top: 0;
  bottom: 0;
  width: 16px;
}

.top-ruler {
  position: relative;
  z-index: 1;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--light-gray);
  letter-spacing: 0.03em;
  border-bottom: 0.5px solid var(--border-gray);
  background: repeating-linear-gradient(
    90deg,
    transparent 0px,
    transparent 39px,
    var(--light-gray) 39px,
    var(--light-gray) 40px
  );
}

/* ============================================
   TOP METADATA BAR
   ============================================ */
.meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  border-bottom: var(--border-thin);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  position: relative;
  z-index: 1;
  background: var(--white);
}

.meta-bar .meta-left,
.meta-bar .meta-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.meta-bar .meta-center {
  display: flex;
  align-items: center;
  gap: 8px;
}

.meta-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--black);
  display: inline-block;
}

.meta-dot.hollow {
  background: transparent;
  border: 1px solid var(--black);
}

.meta-separator {
  color: var(--light-gray);
}

/* ============================================
   REGISTRATION MARKS
   ============================================ */
.reg-mark {
  position: absolute;
  width: 12px;
  height: 12px;
  z-index: 2;
}

.reg-mark::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 0.5px;
  background: var(--light-gray);
}

.reg-mark::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 0.5px;
  height: 100%;
  background: var(--light-gray);
}

.reg-mark.circle {
  border: 0.5px solid var(--light-gray);
  border-radius: 50%;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  z-index: 1;
  border-bottom: var(--border-thin);
  padding: 48px 32px;
  background: var(--white);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.hero-left {
  border-right: var(--border-thin);
  padding-right: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-right {
  padding-left: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-title {
  font-family: var(--font-sans);
  font-size: 72px;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 16px;
  filter: url(#rough-edge-light);
}

.hero-title .mountain {
  display: inline-block;
  font-size: 56px;
  vertical-align: middle;
  margin-left: 8px;
}

.hero-tagline {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--dark-gray);
  margin-bottom: 32px;
}

.hero-description {
  font-size: 14px;
  line-height: 1.7;
  color: var(--dark-gray);
  max-width: 480px;
}

.hero-specs {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  color: var(--mid-gray);
  line-height: 2;
}

.hero-specs .spec-row {
  display: flex;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-gray);
  padding: 4px 0;
}

.hero-specs .spec-label {
  color: var(--mid-gray);
}

.hero-specs .spec-value {
  color: var(--black);
  font-weight: 500;
}

/* Crosshair decoration */
.crosshair {
  position: absolute;
  width: 20px;
  height: 20px;
}

.crosshair::before,
.crosshair::after {
  content: '';
  position: absolute;
  background: var(--black);
}

.crosshair::before {
  width: 1px;
  height: 100%;
  left: 50%;
  transform: translateX(-50%);
}

.crosshair::after {
  width: 100%;
  height: 1px;
  top: 50%;
  transform: translateY(-50%);
}

.crosshair.tl { top: 16px; left: 16px; }
.crosshair.tr { top: 16px; right: 16px; }
.crosshair.bl { bottom: 16px; left: 16px; }
.crosshair.br { bottom: 16px; right: 16px; }

/* ============================================
   MICRO-DECORATION STRIPS
   ============================================ */
.micro-strip {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 16px;
  border-bottom: 0.5px solid var(--border-gray);
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--light-gray);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--white);
  overflow: hidden;
}

.micro-strip .micro-dots {
  display: flex;
  gap: 3px;
  align-items: center;
}

.micro-strip .micro-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--light-gray);
}

.micro-strip .micro-line {
  flex: 1;
  height: 0.5px;
  background: var(--border-gray);
  margin: 0 8px;
}

/* Data matrix decoration */
.data-matrix {
  display: grid;
  grid-template-columns: repeat(8, 3px);
  grid-template-rows: repeat(8, 3px);
  gap: 1px;
  opacity: 0.3;
}

.data-matrix .dm-cell {
  background: var(--black);
}

.data-matrix .dm-cell.empty {
  background: transparent;
}

/* ============================================
   MODULE SECTIONS
   ============================================ */
.module {
  position: relative;
  z-index: 1;
  border-bottom: var(--border-thin);
  background: var(--white);
}

.module-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: var(--border-light);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  position: relative;
}

/* Connecting line from header to content */
.module-header::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 16px;
  width: 40px;
  height: 2px;
  background: var(--black);
}

.module-number {
  font-weight: 700;
  color: var(--black);
  filter: url(#rough-edge-light);
}

.module-title {
  font-weight: 500;
  color: var(--dark-gray);
}

.module-coord {
  color: var(--mid-gray);
}

.module-body {
  padding: var(--module-padding);
}

/* ============================================
   MODULE 001 — ABOUT
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 0;
}

.about-main {
  border-right: var(--border-thin);
  padding-right: var(--module-padding);
}

.about-sidebar {
  padding-left: var(--module-padding);
}

.about-text {
  font-size: 14px;
  line-height: 1.8;
  color: var(--dark-gray);
  margin-bottom: 16px;
}

.about-text strong {
  color: var(--black);
  font-weight: 600;
}

.sidebar-block {
  margin-bottom: 24px;
  position: relative;
}

.sidebar-block::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 0;
  width: 4px;
  height: 4px;
  background: var(--black);
}

.sidebar-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid-gray);
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-gray);
}

.sidebar-value {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--black);
  line-height: 1.6;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.05em;
  padding: 4px 8px;
  border: var(--border-thin);
  margin-bottom: 8px;
}

.status-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--black);
}

.status-badge .dot.hollow {
  background: transparent;
  border: 1px solid var(--black);
}

/* ============================================
   MODULE 002 — FOCUS AREAS
   ============================================ */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.focus-item {
  padding: var(--module-padding);
  border-right: var(--border-light);
  position: relative;
}

.focus-item:last-child {
  border-right: none;
}

/* Corner decoration on focus items */
.focus-item::before {
  content: '';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  border-top: 0.5px solid var(--light-gray);
  border-right: 0.5px solid var(--light-gray);
}

.focus-item::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 8px;
  width: 8px;
  height: 8px;
  border-bottom: 0.5px solid var(--light-gray);
  border-left: 0.5px solid var(--light-gray);
}

.focus-item-number {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--mid-gray);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  filter: url(#rough-edge-light);
}

.focus-item-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.3;
}

.focus-item-desc {
  font-size: 12px;
  color: var(--mid-gray);
  line-height: 1.6;
}

.focus-item-icon {
  position: absolute;
  top: 12px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--light-gray);
}

/* ============================================
   MODULE 003 — PROJECTS
   ============================================ */
.project-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: start;
  padding: 20px 0;
  border-bottom: var(--border-light);
  position: relative;
}

.project-card:last-child {
  border-bottom: none;
}

/* Connecting line decoration */
.project-card::before {
  content: '';
  position: absolute;
  left: 36px;
  top: 0;
  width: 0.5px;
  height: 100%;
  background: repeating-linear-gradient(
    to bottom,
    var(--light-gray) 0px,
    var(--light-gray) 2px,
    transparent 2px,
    transparent 6px
  );
}

.project-index {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--black);
  line-height: 1;
  filter: url(#rough-edge-light);
}

.project-info h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.project-info h3 a {
  color: var(--black);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-info h3 a:hover {
  border-bottom-color: var(--black);
}

.project-info p {
  font-size: 12px;
  color: var(--mid-gray);
  line-height: 1.6;
}

.project-spec {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--light-gray);
  font-size: 11px;
  line-height: 1.7;
  color: var(--mid-gray);
}

.project-spec div {
  margin-top: 3px;
}

.project-spec .spec-k {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  color: var(--light-gray);
  margin-right: 8px;
  white-space: nowrap;
}

.project-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--mid-gray);
  text-align: right;
  line-height: 1.8;
}

.project-meta .lang {
  display: inline-block;
  padding: 2px 6px;
  border: 1px solid var(--light-gray);
  margin-bottom: 4px;
}

/* ============================================
   MODULE 004 — HOW TO JOIN
   ============================================ */
.join-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.join-step {
  padding: var(--module-padding);
  border-right: var(--border-light);
  position: relative;
}

.join-step:last-child {
  border-right: none;
}

/* Arrow connector between steps */
.join-step:not(:last-child)::after {
  content: '\2192';
  position: absolute;
  right: -6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 12px;
  color: var(--light-gray);
  z-index: 2;
  background: var(--white);
  width: 12px;
  height: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--black);
  line-height: 1;
  margin-bottom: 16px;
  filter: url(#rough-edge-light);
}

.step-number::after {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--black);
  margin-top: 8px;
}

.step-title {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.step-desc {
  font-size: 12px;
  color: var(--mid-gray);
  line-height: 1.6;
}

.step-code {
  font-family: var(--font-mono);
  font-size: 11px;
  background: var(--off-white);
  border: 1px solid var(--border-gray);
  padding: 8px 12px;
  margin-top: 12px;
  display: block;
  word-break: break-all;
}

/* ============================================
   MODULE 005 — GROUND RULES
   ============================================ */
.rules-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.rule-item {
  padding: 16px var(--module-padding);
  border-bottom: var(--border-light);
  border-right: var(--border-light);
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.rule-item:nth-child(even) {
  border-right: none;
}

.rule-item:last-child,
.rule-item:nth-last-child(2) {
  border-bottom: none;
}

.rule-index {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--mid-gray);
  min-width: 24px;
  padding-top: 2px;
  filter: url(#rough-edge-light);
}

.rule-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--dark-gray);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta-section {
  position: relative;
  z-index: 1;
  border-bottom: var(--border-thin);
  background: var(--black);
  color: var(--white);
  padding: 64px 32px;
  overflow: hidden;
}

/* Noise texture on dark background */
.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px 256px;
  opacity: 0.06;
  pointer-events: none;
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.cta-left h2 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin-bottom: 16px;
  filter: url(#rough-edge-light);
}

.cta-left p {
  font-size: 14px;
  color: #999;
  line-height: 1.7;
}

.cta-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 16px 32px;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.cta-button:hover {
  background: var(--light-gray);
}

.cta-button.outline {
  background: transparent;
  color: var(--white);
  border: 1px solid var(--white);
}

.cta-button.outline:hover {
  background: rgba(255,255,255,0.1);
}

.cta-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: #666;
  letter-spacing: 0.05em;
  margin-top: 8px;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  position: relative;
  z-index: 1;
  background: var(--white);
  padding: 24px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 0;
}

.footer-col {
  padding: 0 16px;
  border-right: var(--border-light);
}

.footer-col:last-child {
  border-right: none;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mid-gray);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-gray);
}

.footer-col-text {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--dark-gray);
  line-height: 1.8;
}

.footer-col-text a {
  color: var(--black);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.footer-col-text a:hover {
  border-bottom-color: var(--black);
}

/* Barcode decoration */
.barcode {
  display: flex;
  gap: 1px;
  height: 32px;
  align-items: flex-end;
  margin-top: 12px;
}

.barcode .bar {
  width: 2px;
  background: var(--black);
}

.barcode .bar.w1 { width: 1px; }
.barcode .bar.w2 { width: 2px; }
.barcode .bar.w3 { width: 3px; }
.barcode .bar.h-short { height: 20px; }
.barcode .bar.h-med { height: 26px; }
.barcode .bar.h-tall { height: 32px; }

/* ============================================
   DECORATIVE ELEMENTS
   ============================================ */
.corner-mark {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--light-gray);
  letter-spacing: 0.05em;
}

.corner-mark.tl { top: 8px; left: 8px; }
.corner-mark.tr { top: 8px; right: 8px; }
.corner-mark.bl { bottom: 8px; left: 8px; }
.corner-mark.br { bottom: 8px; right: 8px; }

.divider-line {
  height: 1px;
  background: var(--black);
  margin: 0;
}

.divider-dashed {
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--black) 0px,
    var(--black) 4px,
    transparent 4px,
    transparent 8px
  );
}

/* Dimension line decoration */
.dimension-line {
  position: relative;
  height: 12px;
  margin: 0 16px;
  z-index: 1;
}

.dimension-line::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 0.5px;
  background: var(--light-gray);
}

.dimension-line::after {
  content: attr(data-dim);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--light-gray);
  background: var(--white);
  padding: 0 4px;
  letter-spacing: 0.05em;
}

/* Coordinate annotation */
.coord-annotation {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--light-gray);
  position: absolute;
}

/* Section micro-label */
.section-micro-label {
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--light-gray);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 16px;
  border-bottom: 0.5px solid var(--border-gray);
  background: var(--white);
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-micro-label .sml-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--light-gray);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .hero-left {
    border-right: none;
    border-bottom: var(--border-thin);
    padding-right: 0;
    padding-bottom: 24px;
    margin-bottom: 24px;
  }
  .hero-right {
    padding-left: 0;
  }
  .hero-title {
    font-size: 48px;
  }
  .focus-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .focus-item:nth-child(2) {
    border-right: none;
  }
  .focus-item:nth-child(1),
  .focus-item:nth-child(2) {
    border-bottom: var(--border-light);
  }
  .join-steps {
    grid-template-columns: 1fr;
  }
  .join-step {
    border-right: none;
    border-bottom: var(--border-light);
  }
  .join-step:not(:last-child)::after {
    content: '\2193';
    right: 50%;
    top: auto;
    bottom: -6px;
    transform: translateX(50%);
  }
  .rules-list {
    grid-template-columns: 1fr;
  }
  .rule-item {
    border-right: none;
  }
  .cta-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-col:nth-child(2) {
    border-right: none;
  }
  .footer-col:nth-child(1),
  .footer-col:nth-child(2) {
    border-bottom: var(--border-light);
    padding-bottom: 16px;
    margin-bottom: 16px;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .about-main {
    border-right: none;
    border-bottom: var(--border-thin);
    padding-right: 0;
    padding-bottom: 24px;
    margin-bottom: 24px;
  }
  .about-sidebar {
    padding-left: 0;
  }
  .top-ruler,
  .side-ruler {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero-title {
    font-size: 36px;
  }
  .focus-grid {
    grid-template-columns: 1fr;
  }
  .focus-item {
    border-right: none;
    border-bottom: var(--border-light);
  }
  .focus-item:last-child {
    border-bottom: none;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-col {
    border-right: none;
    border-bottom: var(--border-light);
    padding-bottom: 16px;
    margin-bottom: 16px;
  }
  .footer-col:last-child {
    border-bottom: none;
    margin-bottom: 0;
  }
  .meta-bar {
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
  }
  .meta-bar .meta-center,
  .meta-bar .meta-right {
    display: none;
  }
  .micro-strip {
    display: none;
  }
}