/* ═══════════════════════════════════════════
   T3 WORKSHOP — "Neon Terminal Editorial"
   Cadbury purple × dark blue × editorial serif × grain
   ═══════════════════════════════════════════ */

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

/* ── PALETTE ── */
:root {
  --bg:          #08080a;
  --bg-surface:  #111114;
  --bg-card:     #16161a;
  --bg-card-h:   #1c1c22;
  --bg-code:     #282a36;
  --tx:          #ede8df;
  --tx-2:        #8a8690;
  --tx-3:        #4e4b52;
  /* Cadbury-inspired purple (primary) + dark blue (secondary) */
  --accent:      #6d28d9;
  --accent-dim:  rgba(109, 40, 217, 0.2);
  --accent-glow: rgba(109, 40, 217, 0.1);
  --blue:        #7c3aed;
  --blue-dim:    rgba(124, 58, 237, 0.15);
  --teal:        #a78bfa;
  --peach:       #a78bfa;
  --coral:       #c084fc;
  --lavender:    #818cf8;
  --border:      rgba(255, 255, 255, 0.06);
  --border-h:    rgba(255, 255, 255, 0.1);
  --radius:      14px;
  --radius-sm:   8px;
  --serif:       'Instrument Serif', 'Georgia', serif;
  --sans:        'DM Sans', system-ui, sans-serif;
  --mono:        'JetBrains Mono', 'Fira Code', monospace;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-size: 16px;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--tx);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── SNAP SCROLL ── */
main {
  height: 100vh;
  overflow-y: scroll;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
}

.hero,
.slide,
.end-slide {
  scroll-snap-align: start;
}

/* ── GRAIN OVERLAY ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.035;
  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='0.9' 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;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 3px; }

::selection {
  background: var(--accent);
  color: #fff;
}

/* ── TYPOGRAPHY ── */
h1, h2, h3, h4 { line-height: 1.15; }

h1 {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(3rem, 8vw, 6.5rem);
  color: var(--tx);
  letter-spacing: -0.02em;
}

h2 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--tx);
  letter-spacing: -0.01em;
}

h3 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

p { color: var(--tx-2); max-width: 60ch; font-size: 1.1rem; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s, opacity 0.2s;
}
a:hover { color: var(--tx); }

blockquote {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.3rem;
  color: var(--tx-2);
  border-left: 2px solid var(--accent);
  padding: 1rem 0 1rem 1.5rem;
  margin: 2rem 0;
  max-width: 50ch;
}

/* ── NAVIGATION ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 2.5rem;
  background: rgba(8, 8, 10, 0.8);
  backdrop-filter: blur(24px) saturate(1.5);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--tx-3);
}
.logo b { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 0.15rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.45rem 1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--tx-3);
  border-radius: 6px;
  transition: all 0.25s;
}

.nav-links a:hover { color: var(--tx); background: rgba(255,255,255,0.04); }
.nav-links a.active {
  color: #fff;
  background: var(--accent);
  font-weight: 700;
}

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 3rem 5rem;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

/* Hero background meshes */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(109,40,217,0.08) 0%, transparent 65%);
  filter: blur(80px);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30,64,175,0.06) 0%, transparent 65%);
  filter: blur(60px);
  pointer-events: none;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.tag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: blink 2.5s infinite;
}

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

.hero h1 {
  position: relative;
  z-index: 1;
  margin-bottom: 1.5rem;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
  text-shadow: 0 0 60px rgba(109,40,217,0.3);
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--tx-2);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 3rem;
  position: relative;
  z-index: 1;
}

.cta-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  cursor: pointer;
  border: none;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  text-transform: uppercase;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 30px rgba(109,40,217,0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 50px rgba(109,40,217,0.35);
  color: #fff;
}

.btn-ghost {
  background: transparent;
  color: var(--tx-2);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  color: var(--tx);
  border-color: var(--border-h);
  background: rgba(255,255,255,0.03);
}

/* ── TECH STACK BAR ── */
.tech-bar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 2rem 0;
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.tech-bar .tech-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--tx-3);
  white-space: nowrap;
}

.tech-bar .logos {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.tech-bar img {
  width: 28px;
  height: 28px;
  object-fit: contain;
  transition: all 0.3s;
}

/* ── SLIDES ── */
.slide {
  position: relative;
  padding: 8rem 3rem;
  max-width: 1100px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* End slide (page-nav + footer) */
.end-slide {
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.slide:last-of-type { border-bottom: none; }

/* Large background numbers */
.slide[data-num]::before {
  content: attr(data-num);
  position: absolute;
  top: 3rem;
  right: 0;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(8rem, 18vw, 14rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(109,40,217,0.08);
  pointer-events: none;
  user-select: none;
}

.slide-label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--tx-3);
  margin-bottom: 1.5rem;
}

.slide-label .line {
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--tx-3);
}

.slide h2 { margin-bottom: 1rem; }
.slide > p { margin-bottom: 2.5rem; }

/* ── PIE CHART ── */
.pie-chart-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 1rem;
}
.pie-chart-labeled {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pie-chart-simple {
  width: 340px;
  height: 200px;
}
.pie-chart-breakdown {
  width: 420px;
  height: 360px;
}
.pie-chart {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  flex-shrink: 0;
}
.pie-chart.pie-chart-lg {
  width: 280px;
  height: 280px;
}
.pie-label {
  position: absolute;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--tx-2);
  white-space: nowrap;
}
/* 50/50 chart: Engineering (left half, center 3 o'clock), Communication (right half, center 9 o'clock) */
.pie-chart-simple .pie-label-r {
  left: calc(50% + 115px);
  top: 50%;
  transform: translateY(-50%);
}
.pie-chart-simple .pie-label-l {
  right: calc(50% + 115px);
  top: 50%;
  transform: translateY(-50%);
}
/* Breakdown chart: labels next to each slice (clockwise from 12 o'clock) */
.pie-chart-breakdown .pie-label-1 {
  left: calc(50% + 155px);
  top: 50%;
  transform: translateY(-50%);
}
.pie-chart-breakdown .pie-label-2 {
  right: calc(50% + 160px);
  top: calc(50% + 85px);
  transform: translateY(-50%);
  text-align: right;
}
.pie-chart-breakdown .pie-label-3 {
  right: calc(50% + 160px);
  top: calc(50% + 25px);
  transform: translateY(-50%);
  text-align: right;
}
.pie-chart-breakdown .pie-label-4 {
  right: calc(50% + 160px);
  top: calc(50% - 45px);
  transform: translateY(-50%);
  text-align: right;
}
.pie-chart-breakdown .pie-label-5 {
  left: calc(50% - 120px);
  top: 8px;
  transform: translateY(-50%);
}
.pie-chart-breakdown .pie-label-6 {
  left: calc(50% + 85px);
  top: 8px;
  transform: translateY(-50%);
}

/* ── TWO-COLUMN ── */
.cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

@media (max-width: 800px) {
  .cols { grid-template-columns: 1fr; }
}

/* ── CODE BLOCKS ── */
.terminal {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 1.5rem 0;
}

.terminal-chrome {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background: rgba(255,255,255,0.02);
  border-bottom: 1px solid var(--border);
}

.terminal-chrome .dots {
  display: flex;
  gap: 5px;
}
.terminal-chrome .dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tx-3);
  opacity: 0.4;
}
.terminal-chrome .dots span:first-child { background: #ff5f57; opacity: 0.7; }
.terminal-chrome .dots span:nth-child(2) { background: #febc2e; opacity: 0.7; }
.terminal-chrome .dots span:nth-child(3) { background: #28c840; opacity: 0.7; }

.terminal-chrome .file {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--tx-3);
  margin-left: auto;
}

.terminal pre {
  padding: 1.25rem 1.5rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.85;
  overflow-x: auto;
  color: #f8f8f2;
}

/* syntax theme — Dracula */
.kw  { color: #ff79c6; }
.fn  { color: #50fa7b; }
.str { color: #f1fa8c; }
.cm  { color: #6272a4; font-style: italic; }
.num { color: #bd93f9; }
.tp  { color: #8be9fd; }
.op  { color: #ff79c6; }
.pr  { color: #f8f8f2; }

/* inline code */
.c {
  font-family: var(--mono);
  font-size: 0.82em;
  padding: 0.12em 0.45em;
  border-radius: 5px;
  background: var(--accent-dim);
  color: #c4b5fd;
}

/* ── CARDS ── */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent-glow), transparent 60%);
  opacity: 0;
  transition: opacity 0.35s;
}

.card:hover {
  border-color: rgba(109,40,217,0.25);
  transform: translateY(-3px);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
}
.card:hover::before { opacity: 1; }

.card-num {
  font-family: var(--serif);
  font-style: italic;
  font-size: 2.5rem;
  color: var(--accent);
  opacity: 0.3;
  line-height: 1;
  margin-bottom: 0.75rem;
  position: relative;
}

.card h3 {
  position: relative;
  margin-bottom: 0.6rem;
  font-size: 1rem;
}
.card p {
  position: relative;
  font-size: 1rem;
  line-height: 1.6;
}

/* ── CALLOUTS ── */
.callout {
  border-left: 2px solid var(--accent);
  padding: 1.5rem 1.5rem 1.5rem 1.75rem;
  margin: 2rem 0;
  background: linear-gradient(90deg, var(--accent-glow), transparent 50%);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.callout h4 {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.callout p { font-size: 1rem; }

.callout.warn {
  border-color: var(--peach);
  background: linear-gradient(90deg, rgba(167,139,250,0.1), transparent 50%);
}
.callout.warn h4 { color: var(--peach); }

.callout.ok {
  border-color: var(--teal);
  background: linear-gradient(90deg, rgba(59,130,246,0.1), transparent 50%);
}
.callout.ok h4 { color: var(--teal); }

/* ── DAY 3: RACE DEMO ── */
.race-demo {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 1rem;
  max-width: 560px;
}

.race-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-code);
  padding: 1rem;
}

.race-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--tx-3);
  margin-bottom: 0.75rem;
}

.race-label { color: var(--tx-2); }

.race-image {
  width: 180px;
  height: 180px;
  object-fit: contain;
  image-rendering: pixelated;
  display: block;
  margin: 0 auto;
}

.race-card h4 {
  font-family: var(--sans);
  color: var(--tx);
  font-size: 1rem;
  text-align: center;
  margin-top: 0.4rem;
}

.race-status {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--tx-2);
  text-align: center;
  margin-top: 0.4rem;
}

.race-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.9rem;
}

.race-btn {
  border: 1px solid var(--border-h);
  border-radius: 999px;
  background: var(--bg-surface);
  color: var(--tx);
  padding: 0.45rem 0.8rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
}

.race-btn:hover {
  border-color: rgba(255, 255, 255, 0.22);
  background: var(--bg-card-h);
}

.race-btn-accent {
  border-color: rgba(109,40,217,0.3);
  color: var(--accent);
}

/* ── ARCHITECTURE DIAGRAM ── */
.arch-diagram {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 1rem;
  max-width: 860px;
}

.arch-row {
  display: flex;
  gap: 0.8rem;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
}

.arch-row-center {
  justify-content: center;
}

.arch-box {
  min-width: 230px;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.9rem;
}

.arch-box strong {
  display: block;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--tx);
  text-transform: uppercase;
}

.arch-box small {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--tx-3);
  margin-top: 0.25rem;
}

.arch-box-teal {
  border-color: rgba(59,130,246,0.3);
  background: rgba(59,130,246,0.08);
}

.arch-box-teal strong { color: var(--teal); }

.arch-box-accent {
  border-color: rgba(109,40,217,0.3);
  background: rgba(109,40,217,0.1);
}

.arch-box-accent strong { color: var(--accent); }

.arch-link {
  text-align: center;
  font-family: var(--mono);
  font-size: 0.67rem;
  color: var(--tx-3);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin: 0.45rem 0;
}

/* ── SEQUENCE DIAGRAM ── */
.seq-diagram {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.1));
  padding: 0.95rem;
  width: 100%;
  max-width: none;
}

.seq-lanes {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.65rem;
  margin-bottom: 0.5rem;
}

.seq-lane {
  text-align: center;
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: rgba(109,40,217,0.1);
  border: 1px solid rgba(109,40,217,0.25);
  border-radius: 999px;
  padding: 0.25rem 0.4rem;
}

.seq-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.45rem 0.65rem;
  padding: 0.2rem 0;
}

.seq-guides {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  pointer-events: none;
}

.seq-guides span {
  justify-self: center;
  width: 1px;
  background: linear-gradient(180deg, rgba(255,255,255,0.16), rgba(255,255,255,0.06));
}

.seq-event {
  z-index: 1;
  border: 1px solid var(--border);
  background: var(--bg-code);
  border-radius: var(--radius-sm);
  padding: 0.36rem 0.56rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.45;
  color: #a8adb9;
}

.seq-1-2 { grid-column: 1 / span 2; }
.seq-2-3 { grid-column: 2 / span 2; }
.seq-2-4 { grid-column: 2 / span 3; }
.seq-3-2 { grid-column: 2 / span 2; text-align: right; }
.seq-2-1 { grid-column: 1 / span 2; text-align: right; }
.seq-4-3 { grid-column: 3 / span 2; text-align: right; }
.seq-4-1 { grid-column: 1 / span 4; }
.seq-3-3 { grid-column: 3 / span 1; }

/* ── FLOW DIAGRAM ── */
.flow {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 2.5rem 0;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-node {
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-align: center;
  border: 1px solid var(--border);
  background: var(--bg-card);
  position: relative;
}

.flow-node small {
  display: block;
  font-weight: 400;
  font-size: 0.65rem;
  color: var(--tx-3);
  margin-top: 0.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.flow-node.accent {
  border-color: rgba(109,40,217,0.25);
  background: var(--accent-glow);
  color: var(--accent);
}

.flow-node.teal {
  border-color: rgba(59,130,246,0.25);
  background: rgba(59,130,246,0.06);
  color: var(--teal);
}

.flow-arr {
  font-family: var(--mono);
  font-size: 1rem;
  color: var(--tx-3);
}

/* ── WORKFLOW STEPS ── */
.steps {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 2rem 0;
  flex-wrap: wrap;
  justify-content: center;
}

.step {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 0.75rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  white-space: nowrap;
}

.step-n {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  flex-shrink: 0;
}

.step-arr { color: var(--tx-3); font-family: var(--mono); font-size: 0.9rem; }

.step.ghost { opacity: 0.35; }
.step.highlight {
  border-color: rgba(59,130,246,0.35);
  background: rgba(59,130,246,0.08);
}
.step.highlight .step-n { background: var(--teal); }
.step.done {
  border-color: rgba(109,40,217,0.2);
}
.step.done .step-n { background: var(--accent); }

/* ── TIMELINE ── */
.timeline { padding-left: 2rem; position: relative; }

.timeline::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent) 0%, var(--teal) 50%, transparent 100%);
}

.tl-item {
  position: relative;
  padding: 0 0 3rem 2rem;
}

.tl-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.5rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(109,40,217,0.35);
}

.tl-item .tl-time {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.tl-item h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  color: var(--tx);
  margin-bottom: 0.5rem;
}

.tl-item p { font-size: 0.85rem; }

/* ── CHECK LIST ── */
.checks {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.checks li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 1rem;
  color: var(--tx-2);
  line-height: 1.5;
}

.checks li::before {
  content: '>';
  font-family: var(--mono);
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 1px;
}

/* ── ASSIGNMENT BOX ── */
.assignment {
  border: 1px solid rgba(59,130,246,0.2);
  background: linear-gradient(135deg, rgba(59,130,246,0.06), transparent);
  border-radius: var(--radius);
  padding: 2rem;
  margin-top: 2.5rem;
}

.assignment h3 {
  color: var(--teal);
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.assignment ul { list-style: none; display: flex; flex-direction: column; gap: 0.4rem; }

.assignment li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--tx-2);
  line-height: 1.5;
}

.assignment li::before {
  content: '[ ]';
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--teal);
  flex-shrink: 0;
  margin-top: 3px;
}

.stretch {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid rgba(59,130,246,0.12);
}

.stretch-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--peach);
  margin-bottom: 0.5rem;
}

/* ── ICON CARDS ── */
.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0.75rem;
}

.icon-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  transition: border-color 0.3s;
}
.icon-card:hover { border-color: var(--border-h); }

.icon-card .ic {
  font-size: 1.3rem;
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: var(--accent-glow);
}

.icon-card h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--tx);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0.2rem;
}
.icon-card p { font-size: 0.82rem; line-height: 1.5; }

/* ── TABLE ── */
.s-table { width: 100%; border-collapse: collapse; margin-top: 1.5rem; }

.s-table th, .s-table td {
  padding: 0.9rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.s-table th {
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.s-table td { color: var(--tx-2); }
.s-table td strong { color: var(--accent); }
.s-table tr:hover td { color: var(--tx); background: rgba(255,255,255,0.015); }

/* ── BOTTOM NAV ── */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 1rem;
  padding: 4rem 3rem;
  max-width: 1100px;
  margin: 0 auto;
}

.page-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all 0.3s;
  max-width: 50%;
}
.page-nav a:hover {
  border-color: rgba(109,40,217,0.2);
  background: var(--accent-glow);
  color: var(--tx);
}

.page-nav .pn-label {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--tx-3);
}
.page-nav .pn-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--tx);
}

/* ── FOOTER ── */
footer {
  padding: 2.5rem 3rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

footer .f-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

footer .f-links a {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--tx-3);
}
footer .f-links a:hover { color: var(--accent); }

footer p {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--tx-3);
  opacity: 0.5;
  margin: 0 auto;
}

/* ── DIVIDER ── */
.divider {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 3rem;
  border: none;
  border-top: 2px solid var(--accent-dim);
}

/* ── REVEAL ANIMATIONS ── */
.reveal {
  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);
}

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

/* stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-stagger.vis > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.vis > *:nth-child(2) { transition-delay: 0.12s; }
.reveal-stagger.vis > *:nth-child(3) { transition-delay: 0.19s; }
.reveal-stagger.vis > *:nth-child(4) { transition-delay: 0.26s; }
.reveal-stagger.vis > *:nth-child(5) { transition-delay: 0.33s; }
.reveal-stagger.vis > *:nth-child(6) { transition-delay: 0.40s; }

.reveal-stagger.vis > * {
  opacity: 1;
  transform: none;
}

/* ── SPECTRUM ── */
.spectrum {
  position: relative;
  padding: 3rem 0 1rem;
}

.spectrum-track {
  position: relative;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--accent) 50%, var(--lavender));
  border-radius: 2px;
  margin: 0 2rem;
}

.spectrum-labels {
  display: flex;
  justify-content: space-between;
  margin: 0 0.5rem;
  padding-top: 0.5rem;
}

.spectrum-labels span {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--tx-3);
}

.spectrum-points {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.sp-point {
  text-align: center;
  padding: 1.75rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  position: relative;
  transition: all 0.3s;
}

.sp-point:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
}

.sp-point::before {
  content: '';
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid var(--bg);
}

.sp-point.sp-gql::before { background: var(--lavender); box-shadow: 0 0 12px rgba(129,140,248,0.4); }
.sp-point.sp-rest::before { background: var(--coral); box-shadow: 0 0 12px rgba(192,132,252,0.4); }
.sp-point.sp-trpc::before { background: var(--accent); box-shadow: 0 0 12px rgba(109,40,217,0.45); }

.sp-point h4 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 0.15rem;
  text-transform: none;
  letter-spacing: -0.01em;
}

.sp-point.sp-rest h4 { color: var(--coral); }
.sp-point.sp-gql h4 { color: var(--lavender); }
.sp-point.sp-trpc h4 { color: var(--accent); }

.sp-point .sp-sub {
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--tx-3);
  margin-bottom: 1rem;
}

.sp-point p {
  font-size: 0.95rem;
  line-height: 1.55;
  text-align: left;
  margin: 0;
  max-width: none;
}

.sp-point .sp-props {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  text-align: left;
}

.sp-point .sp-props li {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--tx-2);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.sp-point .sp-props li .sp-icon {
  flex-shrink: 0;
  font-size: 0.75rem;
}

.sp-point.active {
  border-color: rgba(109,40,217,0.25);
  background: linear-gradient(135deg, var(--accent-glow), var(--bg-card));
  box-shadow: 0 4px 30px rgba(109,40,217,0.1);
}

@media (max-width: 800px) {
  .spectrum-points {
    grid-template-columns: 1fr;
  }
  .sp-point::before { display: none; }
}

/* ── WEEK TIMELINE (overview slide) ── */
.week-timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: 1.5rem;
}

.week-timeline::before {
  content: '';
  position: absolute;
  left: 5px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), var(--teal), var(--tx-3));
}

.wt-day {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  padding: 1rem 0;
  position: relative;
}

.wt-marker {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--tx-3);
  border: 2px solid var(--bg);
  flex-shrink: 0;
  margin-left: -1.5rem;
  margin-top: 0.35rem;
  position: relative;
  z-index: 1;
}

.wt-marker.active {
  background: var(--accent);
  box-shadow: 0 0 10px rgba(109,40,217,0.4);
}

.wt-content h4 {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1rem;
  color: var(--tx);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0.15rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.wt-tag {
  font-family: var(--mono);
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--bg);
  background: var(--accent);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.wt-title {
  font-weight: 600;
  color: var(--tx) !important;
  font-size: 0.95rem !important;
  margin-bottom: 0.15rem;
}

.wt-content p {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--tx-2);
  margin: 0;
}

/* ── PIPELINE FLOW (traditional workflow) ── */
.pipeline {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 2rem 0;
  flex-wrap: wrap;
  justify-content: center;
}

.pipe-step {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-card);
  white-space: nowrap;
}

.pipe-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--coral);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.6rem;
  font-weight: 800;
  flex-shrink: 0;
}

.pipe-text {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--tx-2);
}

.pipe-arr {
  color: var(--tx-3);
  font-family: var(--mono);
  font-size: 0.9rem;
}

/* ── PAIN GRID (startup slide) ── */
.pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}

.pain-item {
  padding: 1.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  transition: all 0.3s;
}

.pain-item:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
}

.pain-icon {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--coral);
  margin-bottom: 0.5rem;
  line-height: 1;
}

.pain-item h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 1rem;
  color: var(--tx);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0.4rem;
}

.pain-item p {
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0;
}

/* ── STACK GRID (T3 stack slide) ── */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.stack-item {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  text-align: center;
  transition: all 0.3s;
}

.stack-item:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
}

.stack-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
  margin-bottom: 0.6rem;
}

.stack-item h4 {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--tx);
  text-transform: none;
  letter-spacing: 0;
  margin-bottom: 0.25rem;
}

.stack-item p {
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--tx-3);
  margin: 0;
}

/* ── RESPONSIVE ── */
@media (max-width: 800px) {
  nav { padding: 0.6rem 1.25rem; }
  .nav-links a { padding: 0.35rem 0.6rem; font-size: 0.7rem; }
  .hero { padding: 6rem 1.5rem 3rem; }
  .slide { padding: 5rem 1.5rem; }
  .page-nav { padding: 2.5rem 1.5rem; flex-direction: column; }
  .page-nav a { max-width: 100%; }
  footer { padding: 2rem 1.5rem; }
  .flow, .steps, .pipeline { flex-direction: column; }
  .flow-arr, .step-arr, .pipe-arr { transform: rotate(90deg); }
  .pain-grid { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr 1fr; }

  .seq-lanes,
  .seq-flow,
  .seq-guides {
    grid-template-columns: 1fr;
  }

  .seq-guides { display: none; }

  .seq-lane,
  .seq-event {
    font-size: 0.62rem;
  }

  .seq-1-2,
  .seq-2-3,
  .seq-2-4,
  .seq-3-2,
  .seq-2-1,
  .seq-4-3,
  .seq-4-1,
  .seq-3-3 {
    grid-column: 1 / -1;
    text-align: left;
  }
}