/* ============================================================
   HM Labs — Design Token System
   ============================================================
   HOW TO RETHEME:
   Edit ONLY the hex values in :root (light) and .dark (dark).
   Every color on every page derives from these tokens.
   ============================================================ */

/* ── Light Mode (default) — "Paper" ──
   A precision-instrumentation palette: warm blueprint paper, burnt-signal
   amber, phosphor-circuit teal, and a quiet blueprint-blue third accent. */
:root {
  /* Core palette */
  --color-primary:             #E1591B;   /* Signal — headline emphasis, CTAs  */
  --color-primary-container:   #C4470F;   /* Signal, hover/pressed             */
  --color-secondary:           #1C8C74;   /* Circuit — links, live/status      */
  --color-secondary-container: #146B59;   /* Circuit, hover/pressed            */
  --color-accent:              #2B4C7E;   /* Blueprint — third accent, icons   */
  --color-accent-container:    #1F3A63;   /* Blueprint, hover/pressed          */

  /* On-colors (text placed on top of the above) */
  --color-on-primary:          #FBF8EF;
  --color-on-primary-container:#FBF8EF;
  --color-on-secondary:        #FBF8EF;
  --color-on-accent:           #FBF8EF;

  /* Background & surface scale — warm paper, not cool gray */
  --color-background:          #F7F4EC;
  --color-surface:             #FBF9F2;
  --color-surface-low:         #F0EBDD;
  --color-surface-container:   #E7E0CC;
  --color-surface-high:        #D8CFB4;
  --color-surface-highest:     #B3A98A;
  --color-surface-lowest:      #FFFFFF;

  /* Text — warm ink, not cool slate */
  --color-on-background:       #201F1A;
  --color-on-surface:          #201F1A;
  --color-on-surface-variant:  #57544A;
  --color-outline:             #726C5C;   /* darkened from #8C8878 — was ~3.2:1 on paper bg, fails AA at small sizes; now ~4.8:1 */
  --color-outline-variant:     #D3CBB2;

  /* Semantic */
  --color-error:               #C0362B;
  --color-error-container:     #F6E0DC;
  --color-on-error:            #FBF8EF;

  /* Glass panel (light) */
  --glass-bg:                  rgba(251, 249, 242, 0.85);
  --glass-border:              rgba(32, 31, 26, 0.12);

  /* Inverse (for elements that stay dark in light mode) */
  --color-inverse-surface:     #201F1A;
  --color-inverse-on-surface:  #F7F4EC;
}

/* ── Dark Mode — "Ink" ──
   Warm graphite-black, not cool near-black; same instrumentation accents
   recalibrated brighter for contrast. */
.dark {
  /* Core palette */
  --color-primary:             #FF7A3D;   /* Signal, brightened for dark bg    */
  --color-primary-container:   #FF9459;
  --color-secondary:           #4FD9B8;   /* Circuit, brightened               */
  --color-secondary-container: #6FE6C8;
  --color-accent:              #7FA8DE;   /* Blueprint, brightened             */
  --color-accent-container:    #9EC0EC;

  /* On-colors */
  --color-on-primary:          #14140F;
  --color-on-primary-container:#14140F;
  --color-on-secondary:        #14140F;
  --color-on-accent:           #14140F;

  /* Background & surface scale */
  --color-background:          #14140F;
  --color-surface:             #1B1B15;
  --color-surface-low:         #1F1F18;
  --color-surface-container:   #26261D;
  --color-surface-high:        #333227;
  --color-surface-highest:     #4A4938;
  --color-surface-lowest:      #0D0D09;

  /* Text */
  --color-on-background:       #F3F0E6;
  --color-on-surface:          #F3F0E6;
  --color-on-surface-variant:  #B7B2A0;
  --color-outline:             #9C9680;   /* brightened from #837E6C — thin strokes at the old value read as almost invisible on dark bg */
  --color-outline-variant:     #38372B;

  /* Semantic */
  --color-error:               #F0847A;
  --color-error-container:     #4A2420;
  --color-on-error:            #14140F;

  /* Glass panel (dark) */
  --glass-bg:                  rgba(20, 20, 15, 0.85);
  --glass-border:              rgba(243, 240, 230, 0.08);

  /* Inverse */
  --color-inverse-surface:     #F3F0E6;
  --color-inverse-on-surface:  #14140F;
}

/* ============================================================
   Base resets & global styles
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--color-background);
  color:            var(--color-on-background);
  transition: background-color 0.25s ease, color 0.25s ease;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background-color: var(--color-primary);
  color:            var(--color-on-primary);
}

::-webkit-scrollbar            { width: 8px; }
::-webkit-scrollbar-thumb      { background: var(--color-outline-variant); border-radius: 4px; }
::-webkit-scrollbar-track      { background: transparent; }

/* ============================================================
   Color / typography utility classes (hand-rolled — no build step)
   ============================================================ */
.text-primary           { color: var(--color-primary); }
.text-primary-container { color: var(--color-primary-container); }
.text-secondary         { color: var(--color-secondary); }
.text-accent            { color: var(--color-accent); }
.text-on-surface        { color: var(--color-on-surface); }
.text-on-surface-variant{ color: var(--color-on-surface-variant); }
.text-outline           { color: var(--color-outline); }
.text-outline-variant   { color: var(--color-outline-variant); }
.text-on-background     { color: var(--color-on-background); }
.text-error             { color: var(--color-error); }

.bg-background           { background-color: var(--color-background); }
.bg-surface              { background-color: var(--color-surface); }
.bg-surface-low          { background-color: var(--color-surface-low); }
.bg-surface-container    { background-color: var(--color-surface-container); }
.bg-surface-high         { background-color: var(--color-surface-high); }
.bg-surface-lowest       { background-color: var(--color-surface-lowest); }
.bg-primary              { background-color: var(--color-primary); }
.bg-accent               { background-color: var(--color-accent); }

.border-primary          { border-color: var(--color-primary) !important; }
.border-secondary        { border-color: var(--color-secondary) !important; }
.border-accent           { border-color: var(--color-accent) !important; }
.border-outline          { border-color: var(--color-outline) !important; }
.border-outline-variant  { border-color: var(--color-outline-variant) !important; }

.text-on-primary         { color: var(--color-on-primary); }
.text-on-accent          { color: var(--color-on-accent); }

.hover-text-primary:hover     { color: var(--color-primary) !important; }
.hover-border-primary:hover   { border-color: var(--color-primary) !important; }

/* ============================================================
   Layout primitives
   ============================================================ */
.wrap {
  width: 100%;
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: 20px;
}
@media (min-width: 768px) { .wrap { padding-inline: 40px; } }

.section       { padding-block: 96px; }
.section-tight { padding-block: 56px; }
@media (max-width: 767px) {
  .section       { padding-block: 64px; }
  .section-tight { padding-block: 40px; }
}

/* Eyebrow label — the ONE place mono type is used now */
.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: '';
  width: 16px;
  height: 1px;
  background: currentColor;
  display: inline-block;
}

.h-display {
  font-family: 'Space Grotesk', 'Geist', sans-serif;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.05;
  color: var(--color-on-surface);
}
.h-section {
  font-family: 'Space Grotesk', 'Geist', sans-serif;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-on-surface);
}
.body-copy {
  font-family: 'Geist', sans-serif;
  line-height: 1.7;
  color: var(--color-on-surface-variant);
}
.readout {
  font-family: 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ============================================================
   Icons (inline SVG sprite, sized via class)
   ============================================================ */
.icon { width: 22px; height: 22px; flex-shrink: 0; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon-sm { width: 16px; height: 16px; }
.icon-lg { width: 32px; height: 32px; stroke-width: 1.4; }
.icon-xl { width: 44px; height: 44px; stroke-width: 1.3; }

/* Thin strokes read noticeably fainter on dark backgrounds than on light,
   even when the color itself passes WCAG contrast by a wide margin — the
   contrast formula is built for solid fills, not 1-2px lines. Compensate
   with slightly heavier strokes plus a soft same-color glow so icons keep
   the same perceived visual weight as they have in light mode. */
.dark .icon      { stroke-width: 1.85; filter: drop-shadow(0 0 2.5px color-mix(in srgb, currentColor 55%, transparent)); }
.dark .icon-sm   { stroke-width: 1.85; filter: drop-shadow(0 0 2px color-mix(in srgb, currentColor 55%, transparent)); }
.dark .icon-lg   { stroke-width: 1.7; filter: drop-shadow(0 0 3px color-mix(in srgb, currentColor 55%, transparent)); }
.dark .icon-xl   { stroke-width: 1.6; filter: drop-shadow(0 0 3.5px color-mix(in srgb, currentColor 55%, transparent)); }
.dark .schem-icon { stroke-width: 1.8; filter: drop-shadow(0 0 2px color-mix(in srgb, currentColor 50%, transparent)); }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: 'Geist', sans-serif;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, opacity 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 7px; }

.btn-primary {
  background: var(--color-on-surface);
  color: var(--color-background);
}
html.dark .btn-primary { background: var(--color-primary); color: var(--color-on-primary); }
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 10px 30px -8px color-mix(in srgb, var(--color-on-surface) 40%, transparent); }

.btn-accent {
  background: var(--color-primary);
  color: var(--color-on-primary);
}
.btn-accent:hover { transform: translateY(-1px); box-shadow: 0 10px 30px -8px color-mix(in srgb, var(--color-primary) 55%, transparent); background: var(--color-primary-container); }

.btn-outline {
  background: transparent;
  border-color: var(--color-outline-variant);
  color: var(--color-on-surface);
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }

.btn-ghost {
  background: transparent;
  color: var(--color-on-surface-variant);
  padding-inline: 4px;
}
.btn-ghost:hover { color: var(--color-primary); }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  position: relative;
}
.card-pad { padding: 32px; }
.card-hover { transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease; }
.card-hover:hover {
  border-color: color-mix(in srgb, var(--color-primary) 40%, var(--glass-border));
  transform: translateY(-3px);
  box-shadow: 0 20px 40px -22px rgba(0,0,0,0.22);
}

/* Crosshair corner marks — recurring blueprint/PCB alignment-mark motif */
.spec-card { position: relative; }
.spec-card::before, .spec-card::after {
  content: '';
  position: absolute;
  width: 9px; height: 9px;
  border: 1.2px solid color-mix(in srgb, var(--color-primary) 55%, transparent);
  opacity: 0.55;
  pointer-events: none;
}
.spec-card::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.spec-card::after  { bottom: -1px; right: -1px; border-left: none; border-top: none; }

/* ============================================================
   Blueprint grid backdrop — replaces soft gradient mesh
   ============================================================ */
.blueprint-bg {
  position: absolute; inset: 0; z-index: -1; overflow: hidden; pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--color-outline) 16%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-outline) 16%, transparent) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 0%, black 35%, transparent 100%);
  opacity: 0.55;
}
.dark .blueprint-bg { opacity: 0.35; }

/* Tick-mark ruler frame along a section's top/bottom edge */
.tick-frame { position: relative; }
.tick-frame::before {
  content: '';
  position: absolute; left: 0; right: 0; top: 0; height: 1px;
  background-image: repeating-linear-gradient(90deg, var(--color-outline-variant) 0 1px, transparent 1px 24px);
  opacity: 0.8;
}

/* Corner tick brackets framing the hero readout panel */
.tick-corner { position: absolute; width: 18px; height: 18px; }
.tick-corner-tl { top: -1px; left: -1px; border-top: 1.5px solid var(--color-primary); border-left: 1.5px solid var(--color-primary); }
.tick-corner-tr { top: -1px; right: -1px; border-top: 1.5px solid var(--color-primary); border-right: 1.5px solid var(--color-primary); }
.tick-corner-bl { bottom: -1px; left: -1px; border-bottom: 1.5px solid var(--color-primary); border-left: 1.5px solid var(--color-primary); }
.tick-corner-br { bottom: -1px; right: -1px; border-bottom: 1.5px solid var(--color-primary); border-right: 1.5px solid var(--color-primary); }

/* ============================================================
   Status readout panel (hero signature element)
   ============================================================ */
.readout-panel {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: 28px;
  overflow: hidden;
}
.readout-panel .scanline {
  position: absolute; left: 0; right: 0; height: 40%;
  background: linear-gradient(to bottom, transparent, color-mix(in srgb, var(--color-primary) 7%, transparent), transparent);
  animation: scan-sweep 5s ease-in-out infinite;
  pointer-events: none;
}
@keyframes scan-sweep {
  0%   { transform: translateY(-100%); }
  50%  { transform: translateY(220%); }
  100% { transform: translateY(-100%); }
}
.status-light {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-secondary) 25%, transparent), 0 0 10px color-mix(in srgb, var(--color-secondary) 70%, transparent);
}
.readout-row { display: flex; justify-content: space-between; align-items: baseline; padding-block: 14px; border-top: 1px solid var(--glass-border); }
.readout-row:first-of-type { border-top: none; }
.readout-value { font-family: 'JetBrains Mono', monospace; font-variant-numeric: tabular-nums; font-weight: 600; font-size: 26px; color: var(--color-on-surface); }
.readout-label { font-family: 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-outline); }

/* ============================================================
   Hero signature — systems schematic diagram
   ============================================================ */
.schem-node { fill: var(--color-surface); stroke: var(--glass-border); stroke-width: 1.2; }
.schem-icon { color: var(--color-on-surface-variant); stroke: var(--color-on-surface-variant); fill: none; stroke-width: 1.5; }
.schem-label {
  font-family: 'JetBrains Mono', monospace; font-size: 8.5px; letter-spacing: 0.05em;
  fill: var(--color-on-surface-variant);
}
.schem-core { fill: color-mix(in srgb, var(--color-primary) 6%, var(--color-surface)); stroke: var(--color-primary); stroke-width: 1.4; }
.schem-core-label {
  font-family: 'Space Grotesk', 'Geist', sans-serif; font-weight: 600; font-size: 11px;
  letter-spacing: 0.03em; fill: var(--color-on-surface);
}
.trace-line { fill: none; stroke: var(--color-outline-variant); stroke-width: 1.5; }
.trace-pulse {
  fill: var(--color-primary);
  filter: drop-shadow(0 0 3px color-mix(in srgb, var(--color-primary) 80%, transparent));
  offset-rotate: 0deg;
  animation: trace-flow 3.6s linear infinite;
}
@keyframes trace-flow {
  0%   { offset-distance: 0%;   opacity: 0; }
  8%   { opacity: 1; }
  88%  { opacity: 1; }
  100% { offset-distance: 100%; opacity: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .trace-pulse { animation: none; opacity: 0.6; offset-distance: 50%; }
}

.icon-tile {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ============================================================
   Badges & tags
   ============================================================ */
.badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid;
  white-space: nowrap;
}
.badge-primary   { color: var(--color-primary);   border-color: color-mix(in srgb, var(--color-primary) 40%, transparent);   background: color-mix(in srgb, var(--color-primary) 8%, transparent); }
.badge-secondary { color: var(--color-secondary); border-color: color-mix(in srgb, var(--color-secondary) 40%, transparent); background: color-mix(in srgb, var(--color-secondary) 8%, transparent); }
.badge-outline   { color: var(--color-outline);   border-color: var(--color-outline-variant); background: transparent; }

.tech-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--color-on-surface-variant);
  background: var(--color-surface-low);
  border: 1px solid var(--glass-border);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ── Case study / build-log layout ── */
.case-progress {
  display: flex;
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  overflow: hidden;
}
.case-progress a {
  flex: 1;
  text-align: center;
  padding: 11px 10px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-outline);
  border-right: 1px solid var(--glass-border);
  transition: color 0.15s ease, background 0.15s ease;
}
.case-progress a:last-child { border-right: none; }
.case-progress a:hover { color: var(--color-primary); background: var(--color-surface-low); }

.case-brief {
  border-left: 3px solid var(--color-secondary);
  padding-left: 20px;
}

.case-rail {
  position: sticky;
  top: 96px;
}

.log-entry { display: flex; gap: 14px; align-items: flex-start; }
.log-marker {
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 6px;
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  margin-top: 2px;
  color: var(--color-secondary);
  background: color-mix(in srgb, var(--color-secondary) 8%, transparent);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
}

.readout-box {
  background: var(--color-surface-low);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 28px;
  position: relative;
}
.ship-seal-wrap { display: flex; justify-content: center; align-items: center; padding: 8px 0 4px; }
@media (min-width: 1024px) {
  .ship-seal-wrap { justify-content: center; align-items: center; height: 100%; padding: 0; }
}
.ship-seal { width: 100%; max-width: 170px; height: auto; }
@media (min-width: 1024px) {
  .ship-seal { max-width: 220px; }
}
.ship-seal text {
  font-family: 'JetBrains Mono', monospace;
  fill: var(--color-on-surface-variant);
}
.ship-seal .seal-ring { fill: none; stroke: var(--color-primary); stroke-width: 1.4; }
.ship-seal .seal-tick { stroke: var(--color-outline-variant); stroke-width: 1; }
.ship-seal .seal-check { stroke: var(--color-secondary); stroke-width: 2.2; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.ship-seal .seal-label { font-size: 10px; letter-spacing: 0.1em; fill: var(--color-on-surface); font-weight: 600; }
.ship-seal .seal-arc-text { font-size: 7px; letter-spacing: 0.18em; fill: var(--color-outline); }

.proj-nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: var(--color-surface);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 18px 24px;
}
.proj-nav-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--color-on-surface-variant);
  transition: color 0.15s ease;
  min-width: 0;
}
.proj-nav-btn:hover { color: var(--color-primary); }
.proj-nav-btn-next { flex-direction: row-reverse; text-align: right; }
.proj-nav-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-outline);
}
.proj-nav-title { display: block; font-weight: 600; font-size: 14px; }
.proj-nav-all {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-outline);
  white-space: nowrap;
  padding: 0 8px;
  transition: color 0.15s ease;
}
.proj-nav-all:hover { color: var(--color-primary); }
@media (max-width: 640px) {
  .proj-nav-bar { padding: 14px; }
  .proj-nav-title { font-size: 12.5px; }
}

.dot { width: 7px; height: 7px; border-radius: 50%; flex-shrink: 0; }
.dot-primary   { background: var(--color-primary); }
.dot-secondary { background: var(--color-secondary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-secondary) 25%, transparent); }
.dot-outline   { background: var(--color-outline); }
@keyframes pulse-dot { 0%,100% { opacity:1; } 50% { opacity:0.35; } }
.pulse-dot { animation: pulse-dot 2s infinite; }

/* ============================================================
   Header / nav
   ============================================================ */
.site-header {
  background: color-mix(in srgb, var(--color-background) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--glass-border);
}
.nav-link {
  font-family: 'Geist', sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--color-on-surface-variant);
  transition: color 0.2s ease;
}
.nav-link:hover, .nav-link.active { color: var(--color-on-surface); }

.logo-light { display: none; }
.logo-dark  { display: block; }
.dark .logo-light { display: none; }
.dark .logo-dark  { display: block; }
html:not(.dark) .logo-light { display: block; }
html:not(.dark) .logo-dark  { display: none; }

/* ============================================================
   Brand wordmark — typographic logo (replaces raster HM mark
   in the nav/footer; no baked-in padding, scales cleanly)
   ============================================================ */
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Space Grotesk', 'Geist', sans-serif;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-on-surface);
  line-height: 1;
}
.brand-mark .bracket {
  width: 7px; height: 22px;
  border-top: 1.5px solid var(--color-primary);
  border-bottom: 1.5px solid var(--color-primary);
  flex-shrink: 0;
}
.brand-mark .bracket-l { border-left: 1.5px solid var(--color-primary); }
.brand-mark .bracket-r { border-right: 1.5px solid var(--color-primary); }
.brand-mark .brand-sub { font-weight: 500; color: var(--color-on-surface-variant); margin-left: 2px; }
.brand-mark.brand-sm { font-size: 16px; }
.brand-mark.brand-sm .bracket { height: 18px; }

.mob-bar {
  display: block; height: 2px; width: 100%;
  background: var(--color-on-surface); border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
#mob-menu-btn[aria-expanded="true"] .mob-bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#mob-menu-btn[aria-expanded="true"] .mob-bar:nth-child(2) { opacity: 0; }
#mob-menu-btn[aria-expanded="true"] .mob-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mob-nav-link {
  display: block; padding: 12px 4px; font-size: 16px; font-weight: 500;
  color: var(--color-on-surface); border-bottom: 1px solid var(--glass-border);
}

/* ============================================================
   Theme toggle — icon button (no slider, no emoji)
   ============================================================ */
.theme-toggle {
  position: relative;
  width: 40px; height: 40px;
  border-radius: 8px;
  background: transparent;
  border: 1px solid var(--glass-border);
  cursor: pointer; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}
.theme-toggle:hover { border-color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 6%, transparent); }
.theme-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.theme-toggle-knob { position: relative; width: 18px; height: 18px; }
.theme-toggle-icon {
  position: absolute; inset: 0; width: 18px; height: 18px;
  stroke: var(--color-on-surface-variant); fill: none; stroke-width: 1.6;
  stroke-linecap: round; stroke-linejoin: round;
  transition: opacity 0.25s ease, transform 0.35s cubic-bezier(0.4,0,0.2,1);
}
.theme-toggle-icon.icon-sun { opacity: 1; transform: rotate(0deg) scale(1); }
.theme-toggle-icon.icon-moon { opacity: 0; transform: rotate(-40deg) scale(0.6); }
.dark .theme-toggle-icon.icon-sun { opacity: 0; transform: rotate(40deg) scale(0.6); }
.dark .theme-toggle-icon.icon-moon { opacity: 1; transform: rotate(0deg) scale(1); color: var(--color-primary); stroke: var(--color-primary); }
.theme-toggle:hover .theme-toggle-icon { stroke: var(--color-primary); }

/* ============================================================
   Nav active-state indicator (scroll-spy)
   ============================================================ */
.nav-link { position: relative; padding-bottom: 4px; }
.nav-link::after {
  content: '';
  position: absolute; left: 0; right: 100%; bottom: 0; height: 1.5px;
  background: var(--color-primary);
  transition: right 0.3s cubic-bezier(0.4,0,0.2,1);
}
.nav-link.active { color: var(--color-on-surface); }
.nav-link.active::after { right: 0; }

/* ============================================================
   Form
   ============================================================ */
.form-label {
  font-family: 'Geist', sans-serif;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--color-on-surface);
}
.form-label .req { color: var(--color-accent); }

.form-input, .form-select, .form-textarea {
  background: var(--color-surface-low);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--color-on-surface);
  font-family: 'Geist', sans-serif;
  font-size: 15px;
  padding: 11px 14px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
}
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B7280' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
  cursor: pointer;
}
.form-select option { background: var(--color-surface); color: var(--color-on-surface); }
.form-textarea { resize: vertical; min-height: 120px; line-height: 1.6; }
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--color-outline); }
.form-input.err, .form-select.err, .form-textarea.err {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-error) 15%, transparent);
}
.form-err-msg {
  font-size: 12.5px; color: var(--color-error); margin-top: 4px; display: none; font-weight: 500;
}
.form-err-msg.show { display: block; }

.char-count { font-size: 11px; color: var(--color-outline); text-align: right; margin-top: 4px; transition: color 0.2s; }
.char-count.warn { color: var(--color-error); }

.form-status {
  border-radius: 10px; padding: 14px 18px; font-size: 14px;
  display: none; align-items: center; gap: 10px;
}
.form-status.success { display: flex; background: color-mix(in srgb, var(--color-secondary) 10%, transparent); border: 1px solid color-mix(in srgb, var(--color-secondary) 35%, transparent); color: var(--color-secondary); }
.form-status.err-state { display: flex; background: color-mix(in srgb, var(--color-error) 10%, transparent); border: 1px solid color-mix(in srgb, var(--color-error) 35%, transparent); color: var(--color-error); }

/* ============================================================
   FAQ accordion
   ============================================================ */
.faq-item { border-top: 1px solid var(--glass-border); }
.faq-item:first-child { border-top: none; }
.faq-summary {
  list-style: none; cursor: pointer; padding: 22px 4px; font-size: 16px; font-weight: 500;
  color: var(--color-on-surface); display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-summary .faq-icon { transition: transform 0.25s ease; color: var(--color-outline); flex-shrink: 0; }
details[open] > .faq-summary .faq-icon { transform: rotate(45deg); color: var(--color-primary); }
.faq-body { padding: 0 4px 22px; font-size: 15px; color: var(--color-on-surface-variant); line-height: 1.75; max-width: 60ch; }

/* ============================================================
   Footer
   ============================================================ */
.site-footer { border-top: 1px solid var(--glass-border); }

/* ============================================================
   Case study timeline (projects page)
   ============================================================ */
.timeline-line {
  position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; transform: translateX(-50%);
  background: linear-gradient(to bottom, transparent 0%, var(--glass-border) 8%, var(--glass-border) 92%, transparent 100%);
}
.timeline-progress {
  position: absolute; left: 50%; top: 0; width: 2px; transform: translateX(-50%);
  background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
  transition: height 0.5s cubic-bezier(0.4,0,0.2,1); border-radius: 1px;
}
.node-dot {
  width: 11px; height: 11px; border-radius: 50%;
  border: 2px solid var(--color-outline-variant);
  background: var(--color-background);
  transition: all 0.3s ease;
}
.timeline-node.active .node-dot {
  width: 15px; height: 15px; border-color: var(--color-primary); background: var(--color-primary);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-primary) 18%, transparent);
}
.timeline-node.visited .node-dot { border-color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 15%, transparent); }
.node-label {
  font-family: 'Geist', sans-serif; font-size: 11px; color: var(--color-outline);
  text-align: center; line-height: 1.3; transition: color 0.3s; max-width: 74px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.timeline-node.active  .node-label { color: var(--color-primary); font-weight: 600; }
.timeline-node.visited .node-label { color: var(--color-on-surface-variant); }
.timeline-node { position: relative; z-index: 10; cursor: pointer; display: flex; flex-direction: column; align-items: center; gap: 8px; }

.projects-track { display: flex; transition: transform 0.55s cubic-bezier(0.4,0,0.2,1); will-change: transform; }
.project-panel { flex-shrink: 0; width: 100%; }
.projects-viewport { overflow: hidden; position: relative; }

.panel-content { opacity: 0; transform: translateX(20px); transition: opacity 0.4s ease 0.1s, transform 0.4s ease 0.1s; }
.panel-content.in { opacity: 1; transform: translateX(0); }

.deliverable-item { position: relative; padding-left: 1.6rem; }
.deliverable-item::before {
  content: ''; position: absolute; left: 0; top: 0.5em; width: 8px; height: 8px; border-radius: 2px;
  background: var(--color-primary); transform: rotate(45deg);
}
.outcome-block {
  border-left: 3px solid var(--color-secondary);
  background: color-mix(in srgb, var(--color-secondary) 5%, transparent);
  border-radius: 0 12px 12px 0;
  padding: 24px;
}

.mob-pill {
  padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 500;
  border: 1px solid var(--glass-border); background: var(--color-surface);
  color: var(--color-on-surface-variant); cursor: pointer; transition: color 0.2s, border-color 0.2s;
}
.mob-pill.active { color: var(--color-primary); border-color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 8%, transparent); }

.timeline-top-icon {
  width: 40px; height: 40px; border-radius: 50%;
  border: 1.5px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface);
  color: var(--color-primary);
}

/* ============================================================
   Scroll-reveal helper (GSAP toggles .in)
   ============================================================ */
.reveal { opacity: 0; transform: translateY(24px); }
.reveal.in { opacity: 1; transform: translateY(0); transition: opacity 0.7s ease, transform 0.7s ease; }
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal.in { opacity: 1; transform: none; transition: none; }
}

/* ============================================================
   Misc
   ============================================================ */
.divider { height: 1px; background: var(--glass-border); }

/* Mobile-only swipe carousel (Work / Testimonials) — hides scrollbar,
   desktop overrides back to a normal grid via md: classes on the element. */
.mobile-carousel::-webkit-scrollbar { display: none; }
.mobile-carousel { scrollbar-width: none; -ms-overflow-style: none; }

*, *::before, *::after {
  transition-property: background-color, border-color, color;
  transition-duration: 0.2s;
  transition-timing-function: ease;
}
.btn, .form-submit-btn, .card-hover, .panel-content,
.timeline-progress, .node-dot, .projects-track, .reveal {
  transition: none;
}
.btn { transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, opacity 0.15s ease, color 0.2s ease; }
.card-hover { transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease; }
.panel-content { transition: opacity 0.4s ease 0.1s, transform 0.4s ease 0.1s; }
.timeline-progress { transition: height 0.5s cubic-bezier(0.4,0,0.2,1); }
.node-dot { transition: all 0.3s ease; }
.projects-track { transition: transform 0.55s cubic-bezier(0.4,0,0.2,1); }
.reveal.in { transition: opacity 0.7s ease, transform 0.7s ease; }