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

:root {
  --paper:      #fcfcfc;
  --ink:        #0a0a0a;
  --accent:     #0055ff;
  --accent-dim: rgba(0, 85, 255, 0.08);
  --ink-faint:  rgba(10,10,10,0.08);
  --ink-mid:    rgba(10,10,10,0.4);
  --grid:       40px;
  --mono:       'IBM Plex Mono', monospace;
  --sans:       'Hanken Grotesk', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: hidden;
  cursor: none;
  -webkit-font-smoothing: antialiased;
}

/* =========================================
   GRID BACKGROUND UTILITY
========================================= */
.grid-bg {
  background-image:
    linear-gradient(to right,  rgba(0,85,255,0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,85,255,0.055) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
}

/* Major grid lines every 5th cell */
.grid-bg-major {
  background-image:
    linear-gradient(to right,  rgba(0,85,255,0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,85,255,0.12) 1px, transparent 1px),
    linear-gradient(to right,  rgba(0,85,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,85,255,0.04) 1px, transparent 1px);
  background-size:
    calc(var(--grid)*5) calc(var(--grid)*5),
    calc(var(--grid)*5) calc(var(--grid)*5),
    var(--grid) var(--grid),
    var(--grid) var(--grid);
}

/* =========================================
   CROSSHAIR CURSOR — fixed overlay
========================================= */
#cursor {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

#cursor-h, #cursor-v {
  position: absolute;
  background: var(--accent);
  opacity: 0.25;
}
#cursor-h { left: 0; right: 0; height: 1px; top: -2px; }
#cursor-v { top: 0; bottom: 0; width: 1px;  left: -2px; }

#cursor-ring {
  position: absolute;
  width: 10px; height: 10px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  transform: translate(-5px, -5px);
  opacity: 0.8;
}

#cursor-coords {
  position: absolute;
  font-family: var(--mono);
  font-size: 9px;
  color: var(--accent);
  letter-spacing: 0.06em;
  white-space: nowrap;
  transform: translate(14px, -20px);
  background: rgba(252,252,252,0.85);
  padding: 2px 5px;
}

/* =========================================
   § 01 — HERO
========================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 0;
  align-content: center;
  padding: calc(var(--grid)*2);
  overflow: hidden;
}

.sticky-nav {
  position: fixed;
  top: 14px;
  left: 14px;
  right: 14px;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.sticky-nav-link {
  pointer-events: auto;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--accent);
  border: 1px solid rgba(0,85,255,0.28);
  background: rgba(252,252,252,0.82);
  padding: 6px 10px;
  border-radius: 999px;
  transition: transform 0.2s ease, background-color 0.2s ease, opacity 0.2s ease;
}

.sticky-nav-link:hover {
  transform: translateY(-1px);
  background: rgba(252,252,252,0.96);
  opacity: 1;
}

/* Corner ticks */
.tick {
  position: absolute;
  width: 16px; height: 16px;
}
.tick--tl { top:  40px; left:  40px; border-top: 1px solid var(--accent); border-left: 1px solid var(--accent); }
.tick--tr { top:  40px; right: 40px; border-top: 1px solid var(--accent); border-right:1px solid var(--accent); }
.tick--bl { bottom:40px;left:  40px; border-bottom:1px solid var(--accent); border-left:1px solid var(--accent); }
.tick--br { bottom:40px;right: 40px; border-bottom:1px solid var(--accent); border-right:1px solid var(--accent); }

.hero-corner-label {
  position: absolute;
  font-family: var(--mono);
  font-size: 8px;
  color: rgba(0,85,255,0.45);
  letter-spacing: 0.1em;
  line-height: 1.6;
}
.hero-corner-label--tl { top: 62px;    left: 62px;  }
.hero-corner-label--tr { top: 62px;    right:62px; text-align:right; }
.hero-corner-label--bl { bottom: 62px; left: 62px;  }
.hero-corner-label--br { bottom: 62px; right:62px; text-align:right; }

/* Horizontal rule at grid row */
.hero-rule {
  grid-column: 1 / -1;
  height: 1px;
  background: var(--ink-faint);
  margin-bottom: calc(var(--grid)*1.5);
  position: relative;
}
.hero-rule::before {
  content: 'GRUNDLINIE — 0px';
  position: absolute;
  right: 0; top: 4px;
  font-family: var(--mono);
  font-size: 8px;
  color: rgba(0,85,255,0.35);
  letter-spacing: 0.1em;
}

.hero-meta-left {
  grid-column: 1 / 5;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  padding-bottom: calc(var(--grid)*2);
  display: flex; align-items: flex-end;
}

.hero-meta-right {
  grid-column: 9 / 13;
  text-align: right;
  font-family: var(--mono);
  font-size: 9px;
  line-height: 1.8;
  color: var(--ink-mid);
  padding-bottom: calc(var(--grid)*2);
  display: flex; flex-direction:column; align-items:flex-end; justify-content:flex-end;
}

.hero-headline {
  grid-column: 1 / 11;
  font-size: clamp(52px, 9.5vw, 136px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.035em;
  padding-bottom: calc(var(--grid)*2.5);
}

.hero-headline em {
  display: block;
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
}

.hero-kpi {
  grid-column: 1 / 7;
  display: flex;
  gap: 48px;
  align-items: flex-end;
}

.kpi-item { display: flex; flex-direction: column; gap: 5px; }

.kpi-value {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.kpi-label {
  font-family: var(--mono);
  font-size: 8.5px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-mid);
}

.hero-desc {
  grid-column: 7 / 13;
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.9;
  color: rgba(10,10,10,0.45);
  border-left: 1px solid var(--accent);
  padding-left: 20px;
  align-self: flex-end;
}

.hero-scroll {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: calc(var(--grid)*3);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(10,10,10,0.25);
}

.hero-scroll::before {
  content: '';
  display: block;
  width: 36px; height: 1px;
  background: currentColor;
  flex-shrink: 0;
}

/* Tracking status badge */
.tracking-badge {
  position: absolute;
  top: 42px; left: 50%; transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.15em;
  color: var(--accent);
  display: flex; align-items: center; gap: 6px;
}

.tracking-badge .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

/* =========================================
   § 02 — TECH SPECS (DARK)
========================================= */
.specs {
  background: var(--ink);
  color: var(--paper);
  padding: calc(var(--grid)*3) calc(var(--grid)*2);
  position: relative;
  overflow: hidden;
}

.specs::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right,  rgba(0,85,255,0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,85,255,0.05) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
}

.specs-inner { position: relative; z-index: 1; }

.specs-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px solid rgba(252,252,252,0.08);
  padding-bottom: 20px;
  margin-bottom: 48px;
}

.specs-title {
  font-size: clamp(26px, 4vw, 52px);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.specs-doc {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.12em;
}

/* Spec cards grid */
.specs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid rgba(252,252,252,0.07);
}

@media (max-width: 900px) { .specs-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 580px) { .specs-grid { grid-template-columns: 1fr; } }

.spec-card {
  padding: 28px 32px;
  border-right: 1px solid rgba(252,252,252,0.07);
  border-bottom: 1px solid rgba(252,252,252,0.07);
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.spec-card.visible { opacity: 1; transform: none; }

.spec-card:nth-child(3n) { border-right: none; }

.spec-key {
  font-family: var(--mono);
  font-size: 8.5px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 10px;
}

.spec-val {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1;
  margin-bottom: 10px;
}

.spec-note {
  font-size: 12px;
  line-height: 1.65;
  color: rgba(252,252,252,0.38);
}

.spec-bar-track {
  margin-top: 16px;
  height: 2px;
  background: rgba(252,252,252,0.07);
  position: relative;
  overflow: hidden;
}

.spec-bar-fill {
  position: absolute;
  inset-block: 0; left: 0;
  background: var(--accent);
  width: 0;
  transition: width 1.3s cubic-bezier(0.16,1,0.3,1);
}

.spec-card.visible .spec-bar-fill { width: var(--w, 80%); }

/* Performance data table */
.perf-table {
  margin-top: 64px;
  border: 1px solid rgba(252,252,252,0.07);
}

.perf-head {
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr;
  padding: 12px 24px;
  border-bottom: 1px solid rgba(252,252,252,0.07);
  font-family: var(--mono);
  font-size: 8.5px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(252,252,252,0.28);
}

.perf-row {
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr;
  padding: 14px 24px;
  border-bottom: 1px solid rgba(252,252,252,0.04);
  align-items: center;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.perf-row:last-child { border-bottom: none; }
.perf-row.visible { opacity: 1; }

.perf-name { font-size: 12.5px; color: rgba(252,252,252,0.72); }

.perf-num {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
}

.perf-unit {
  font-family: var(--mono);
  font-size: 8.5px;
  color: rgba(252,252,252,0.25);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  padding: 3px 9px;
  border-radius: 2px;
}

.badge--pass {
  background: rgba(0,85,255,0.14);
  color: var(--accent);
  border: 1px solid rgba(0,85,255,0.28);
}

.badge--pass::before {
  content: '✓';
  font-size: 9px;
}

/* =========================================
   § 03 — INTERACTION (GEOMETRY CANVAS)
========================================= */
.geo-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
}

@media (max-width: 768px) { .geo-section { grid-template-columns: 1fr; } }

.geo-info {
  padding: calc(var(--grid)*3) calc(var(--grid)*2);
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-right: 1px solid var(--ink-faint);
}

.section-tag {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin-bottom: 24px;
}

.geo-title {
  font-size: clamp(34px, 4.5vw, 62px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.0;
  margin-bottom: 24px;
}

.geo-desc {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-mid);
  max-width: 380px;
  margin-bottom: 40px;
}

/* Parameter terminal */
.param-terminal {
  border: 1px solid rgba(0,85,255,0.16);
  background: rgba(0,85,255,0.025);
}

.terminal-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 14px;
  border-bottom: 1px solid rgba(0,85,255,0.1);
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.terminal-bar .live-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.4s ease-in-out infinite;
  display: inline-block;
  margin-right: 5px;
}

.param-line {
  display: grid;
  grid-template-columns: 80px 1fr 72px;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(0,85,255,0.06);
  align-items: center;
}

.param-line:last-child { border-bottom: none; }

.p-key {
  font-family: var(--mono);
  font-size: 8.5px;
  color: rgba(10,10,10,0.38);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.p-track {
  height: 2px;
  background: rgba(0,85,255,0.1);
  position: relative;
}

.p-fill {
  position: absolute;
  inset-block: 0; left: 0;
  background: var(--accent);
  transition: width 0.12s linear;
}

.p-val {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  text-align: right;
  letter-spacing: -0.01em;
  transition: color 0.1s;
}

/* Geometry canvas */
.geo-canvas {
  position: relative;
  overflow: hidden;
  background: rgba(0,85,255,0.018);
  cursor: none;
}

.geo-canvas::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right,  rgba(0,85,255,0.065) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0,85,255,0.065) 1px, transparent 1px);
  background-size: var(--grid) var(--grid);
  pointer-events: none;
  z-index: 1;
}

#geo-svg {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
  z-index: 2;
}

/* =========================================
   § 04 — CTA + FOOTER
========================================= */
.cta-section {
  border-top: 1px solid var(--ink-faint);
  padding: calc(var(--grid)*2.5) calc(var(--grid)*2);
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  align-items: center;
  gap: 40px;
}

@media (max-width: 640px) {
  .cta-section { grid-template-columns: 1fr; text-align: center; }
  .sticky-nav-link {
    font-size: 9px;
    padding: 5px 8px;
  }
}

.cta-left {}

.cta-label {
  font-family: var(--mono);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-mid);
  margin-bottom: 10px;
}

.cta-email {
  font-size: clamp(18px, 2.8vw, 36px);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  position: relative;
  display: inline-block;
}

.cta-email::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.35s cubic-bezier(0.16,1,0.3,1);
}

.cta-email:hover { color: var(--accent); }
.cta-email:hover::after { width: 100%; }

.cta-center { text-align: center; }

.cta-symbol {
  font-family: var(--mono);
  font-size: 28px;
  color: rgba(0,85,255,0.25);
  line-height: 1;
  letter-spacing: -0.05em;
}

.cta-right { text-align: right; }

.cta-right p {
  font-family: var(--mono);
  font-size: 10px;
  line-height: 1.9;
  color: var(--ink-mid);
}

.cta-right strong { color: rgba(10,10,10,0.65); font-weight: 500; }

footer {
  border-top: 1px solid var(--ink-faint);
  padding: 18px calc(var(--grid)*2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

footer span {
  font-family: var(--mono);
  font-size: 9px;
  color: rgba(10,10,10,0.25);
  letter-spacing: 0.08em;
}

/* =========================================
   SCROLL REVEAL
========================================= */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.in { opacity: 1; transform: none; }

.reveal-d1 { transition-delay: 0.07s; }
.reveal-d2 { transition-delay: 0.14s; }
.reveal-d3 { transition-delay: 0.21s; }

@media (hover: none), (pointer: coarse), (prefers-reduced-motion: reduce) {
  body {
    cursor: auto;
  }

  #cursor {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal,
  .spec-card,
  .perf-row {
    opacity: 1 !important;
    transform: none !important;
  }
}