/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --indigo:   #6366f1;
  --purple:   #a855f7;
  --pink:     #ec4899;
  --cyan:     #22d3ee;
  --bg:       #080a12;
  --surface:  #0f1220;
  --surface2: #161929;
  --border:   rgba(99, 102, 241, 0.18);
  --text:     #e2e8f0;
  --muted:    #64748b;
  --ease:     cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:  cubic-bezier(0.55, 0, 1, 0.45);
}

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

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   BACKGROUND GRID
   ============================================================ */
.bg-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* ============================================================
   GLOW BLOBS
   ============================================================ */
.glow {
  position: absolute; border-radius: 50%;
  filter: blur(120px); opacity: 0.25; pointer-events: none; z-index: 0;
}
.glow-1 { width: 600px; height: 600px; background: var(--indigo); top: -200px; left: -200px; }
.glow-2 { width: 500px; height: 500px; background: var(--purple); bottom: -150px; right: -150px; }
.glow-3 { width: 700px; height: 400px; background: var(--pink); top: 50%; left: 50%; transform: translate(-50%,-50%); opacity: 0.15; }
.glow-4 { width: 400px; height: 400px; background: var(--cyan); bottom: -100px; left: 10%; opacity: 0.12; }

/* ============================================================
   SLIDE ENGINE
   ============================================================ */
.slide {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transform: translateY(40px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
  overflow: hidden;
  z-index: 1;
}
.slide.active {
  opacity: 1; pointer-events: auto;
  transform: translateY(0);
}
.slide.exit-up {
  opacity: 0; transform: translateY(-40px);
  transition: opacity 0.35s var(--ease-in), transform 0.35s var(--ease-in);
}
.slide.exit-down {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.35s var(--ease-in), transform 0.35s var(--ease-in);
}
/* Starting position for prev-direction incoming slide */
.slide.enter-prev {
  transform: translateY(-40px);
}

.slide-content {
  position: relative; z-index: 2;
  width: 100%; max-width: 1080px;
  padding: 60px 40px;
}
.slide-content.centered { text-align: center; }

/* ============================================================
   ANIMATED ELEMENTS (child elements that animate in per slide)
   ============================================================ */
.animated {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--d, 0s);
}
.slide.active .animated {
  opacity: 1; transform: translateY(0);
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
.eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--indigo);
  margin-bottom: 16px;
}
.hero-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 800; line-height: 1.1;
  margin-bottom: 24px; color: #fff;
}
.section-title {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  font-weight: 700; line-height: 1.15;
  margin-bottom: 40px; color: #fff;
}
.hero-sub {
  font-size: 1.15rem; line-height: 1.7;
  color: var(--muted); margin-bottom: 36px;
}
.sub-note {
  font-size: 0.95rem; color: var(--muted); margin-top: 28px;
}
.sub-note strong { color: var(--text); }

/* ============================================================
   GRADIENT TEXT
   ============================================================ */
.gradient-text {
  background: linear-gradient(90deg, var(--indigo), var(--purple), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.gradient-text-pink {
  background: linear-gradient(90deg, var(--pink), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   PILLS
   ============================================================ */
.pill-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.pill {
  font-size: 0.8rem; font-weight: 500; letter-spacing: 0.05em;
  padding: 6px 16px; border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(99,102,241,0.08);
  color: var(--indigo);
}

/* ============================================================
   SLIDE 2 — PROBLEM CARDS
   ============================================================ */
.problem-cards {
  display: flex; align-items: center; gap: 24px; margin-bottom: 32px;
  flex-wrap: wrap;
}
.problem-card {
  flex: 1; min-width: 260px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px;
}
.problem-card.bad { border-color: rgba(236,72,153,0.3); background: rgba(236,72,153,0.06); }
.card-icon { font-size: 1.8rem; display: block; margin-bottom: 10px; }
.card-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 10px;
}
.card-quote {
  font-size: 1.05rem; line-height: 1.55; color: var(--text); font-style: italic;
}
.arrow-mid { font-size: 2rem; color: var(--muted); }
.stat { font-size: 1.05rem; color: var(--muted); }
.stat-num {
  font-family: 'Syne', sans-serif; font-size: 2.4rem; font-weight: 800;
  background: linear-gradient(90deg, var(--indigo), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-right: 8px;
}

/* ============================================================
   SLIDE 3 — SOLUTION GRID
   ============================================================ */
.solution-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px; text-align: left;
}
.sol-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 24px;
  transition: border-color 0.3s;
}
.sol-item:hover { border-color: var(--indigo); }
.sol-icon { font-size: 1.6rem; margin-bottom: 10px; }
.sol-item strong { display: block; font-weight: 600; margin-bottom: 8px; color: #fff; }
.sol-item p { font-size: 0.9rem; color: var(--muted); line-height: 1.55; }

/* ============================================================
   SLIDE 4 — FRAMEWORK
   ============================================================ */
.framework-row {
  display: flex; align-items: flex-start; gap: 16px;
  justify-content: center; flex-wrap: wrap;
}
.fw-step {
  flex: 1; min-width: 200px; max-width: 280px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 24px; text-align: left;
}
.fw-num {
  font-family: 'Syne', sans-serif; font-size: 2rem; font-weight: 800;
  line-height: 1; margin-bottom: 8px;
}
.fw-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--indigo);
  margin-bottom: 12px;
}
.fw-step p { font-size: 0.9rem; color: var(--muted); line-height: 1.55; }
.fw-connector { font-size: 1.5rem; color: var(--muted); align-self: center; }

/* ============================================================
   SLIDE 5 — DEMO FLOW
   ============================================================ */
.demo-flow {
  display: flex; flex-direction: column; gap: 0; max-width: 680px;
  margin: 0 auto;
}
.demo-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 24px 28px;
}
.reply-box { border-color: rgba(99,102,241,0.4); background: rgba(99,102,241,0.08); }
.demo-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 6px;
}
.demo-handle { font-weight: 600; color: var(--indigo); margin-bottom: 8px; font-size: 0.9rem; }
.demo-text { font-size: 1rem; line-height: 1.6; color: var(--text); }
.demo-text em { font-style: normal; font-weight: 600; color: #fff; }

.demo-arrow {
  display: flex; flex-direction: column; align-items: center;
  padding: 10px 0; gap: 4px;
}
.demo-arrow-line {
  width: 2px; height: 30px;
  background: linear-gradient(to bottom, var(--indigo), var(--purple));
}
.demo-arrow-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem; letter-spacing: 0.1em;
  color: var(--purple); text-transform: uppercase;
}
.demo-tags { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.demo-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem; letter-spacing: 0.1em;
  text-transform: uppercase; padding: 3px 10px;
  border-radius: 999px; border: 1px solid;
}
.demo-tag.earn   { color: var(--cyan);   border-color: var(--cyan);   background: rgba(34,211,238,0.08); }
.demo-tag.bridge { color: var(--purple); border-color: var(--purple); background: rgba(168,85,247,0.08); }
.demo-tag.cta    { color: var(--pink);   border-color: var(--pink);   background: rgba(236,72,153,0.08); }

/* ============================================================
   SLIDE 6 — PIPELINE
   ============================================================ */
.pipeline {
  display: flex; align-items: center; justify-content: center;
  gap: 20px; flex-wrap: wrap;
}
.pipe-stage {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 24px; min-width: 210px; text-align: left;
}
.highlight-stage {
  border-color: rgba(99,102,241,0.5);
  background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(168,85,247,0.08));
}
.pipe-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.12em;
  text-transform: uppercase; padding: 3px 10px;
  border-radius: 999px; border: 1px solid;
  display: inline-block; margin-bottom: 12px;
}
.haiku-badge  { color: var(--cyan);   border-color: var(--cyan);   background: rgba(34,211,238,0.1); }
.sonnet-badge { color: var(--purple); border-color: var(--purple); background: rgba(168,85,247,0.1); }
.pipe-model {
  font-family: 'Syne', sans-serif; font-weight: 700;
  font-size: 1.1rem; color: #fff; margin-bottom: 4px;
}
.pipe-role {
  font-size: 0.82rem; color: var(--muted); margin-bottom: 14px;
}
.pipe-list {
  list-style: none; display: flex; flex-direction: column; gap: 6px;
}
.pipe-list li {
  font-size: 0.88rem; color: var(--text);
  padding-left: 14px; position: relative;
}
.pipe-list li::before {
  content: '▸'; position: absolute; left: 0; color: var(--indigo);
}
.pipe-arrow {
  display: flex; flex-direction: column; align-items: center;
  gap: 4px; color: var(--muted); font-size: 1.5rem;
}
.pipe-arrow-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem; letter-spacing: 0.08em;
  color: var(--muted); text-transform: uppercase;
}

/* ============================================================
   SLIDE 7 — ARCHITECTURE DIAGRAM
   ============================================================ */
.arch-diagram { display: flex; flex-direction: column; align-items: center; gap: 16px; }
.arch-row {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  justify-content: center;
}
.arch-row-down {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  justify-content: center;
}
.arch-box {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 22px; text-align: center; min-width: 140px;
  transition: border-color 0.3s, transform 0.3s;
}
.arch-box:hover { border-color: var(--indigo); transform: translateY(-3px); }
.arch-box.frontend { border-color: rgba(34,211,238,0.3); }
.arch-box.api      { border-color: rgba(99,102,241,0.3); }
.arch-box.lambda   { border-color: rgba(168,85,247,0.3); }
.arch-box.db       { border-color: rgba(99,102,241,0.3); }
.arch-box.ai       { border-color: rgba(236,72,153,0.3); }
.arch-icon { font-size: 1.6rem; margin-bottom: 6px; }
.arch-name { font-weight: 600; font-size: 0.9rem; color: #fff; margin-bottom: 4px; }
.arch-sub { font-size: 0.75rem; color: var(--muted); }
.arch-line {
  font-size: 1.4rem; color: var(--muted); font-weight: 300;
}
.arch-line-up { transform: rotate(-90deg); }
.arch-badges { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-top: 8px; }
.arch-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 4px 12px; border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--indigo); background: rgba(99,102,241,0.08);
}

/* ============================================================
   SLIDE 8 — CTA
   ============================================================ */
.cta-group { margin: 28px 0; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: linear-gradient(135deg, var(--indigo), var(--purple));
  color: #fff; font-weight: 600; font-size: 1rem;
  padding: 14px 32px; border-radius: 12px;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 0 40px rgba(99,102,241,0.4);
}
.btn-primary:hover {
  opacity: 0.9; transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(99,102,241,0.6);
}
.final-stats {
  display: flex; align-items: center; justify-content: center;
  gap: 32px; margin-top: 40px; flex-wrap: wrap;
}
.fstat { text-align: center; }
.fstat-num {
  font-family: 'Syne', sans-serif; font-size: 2.8rem; font-weight: 800; line-height: 1;
}
.fstat-label { font-size: 0.78rem; color: var(--muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.08em; }
.fstat-divider { width: 1px; height: 50px; background: var(--border); }
.footer-brand {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; letter-spacing: 0.1em;
  color: var(--muted); margin-top: 32px;
}

/* ============================================================
   UI CHROME — PROGRESS / COUNTER / DOTS / ARROWS
   ============================================================ */
.progress-bar {
  position: fixed; top: 0; left: 0; height: 3px; z-index: 100;
  background: linear-gradient(90deg, var(--indigo), var(--purple), var(--pink));
  transition: width 0.5s var(--ease);
}
.slide-counter {
  position: fixed; top: 20px; right: 24px; z-index: 100;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; letter-spacing: 0.12em;
  color: var(--muted); text-transform: uppercase;
}
.nav-dots {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  z-index: 100; display: flex; gap: 8px; align-items: center;
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  border: none; background: var(--muted); cursor: pointer;
  transition: background 0.3s, transform 0.3s;
  padding: 0;
}
.dot.active { background: var(--indigo); transform: scale(1.4); }
.dot:hover  { background: var(--purple); }

.arrow {
  position: fixed; top: 50%; transform: translateY(-50%);
  z-index: 100; background: var(--surface);
  border: 1px solid var(--border); color: var(--muted);
  width: 44px; height: 44px; border-radius: 50%;
  font-size: 1.1rem; cursor: pointer; display: flex;
  align-items: center; justify-content: center;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}
.arrow:hover { color: #fff; border-color: var(--indigo); background: rgba(99,102,241,0.15); }
.arrow-prev { left: 20px; }
.arrow-next { right: 20px; }
.arrow:disabled { opacity: 0.25; cursor: default; pointer-events: none; }

.click-hint {
  position: fixed; bottom: 64px; left: 50%; transform: translateX(-50%);
  z-index: 100;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
  animation: pulse 2.5s ease-in-out infinite;
  transition: opacity 0.5s;
}
.click-hint.hidden { opacity: 0; pointer-events: none; }

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 0.9; }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .slide-content { padding: 48px 20px; }
  .hero-title { font-size: 2rem; }
  .section-title { font-size: 1.7rem; }
  .problem-cards { flex-direction: column; }
  .arrow-mid { transform: rotate(90deg); }
  .framework-row { flex-direction: column; align-items: center; }
  .fw-connector { transform: rotate(90deg); }
  .pipeline { flex-direction: column; }
  .pipe-arrow { transform: rotate(90deg); }
  .arch-row { flex-direction: column; }
  .arch-line { transform: rotate(90deg); }
  .final-stats { gap: 20px; }
  .fstat-divider { width: 40px; height: 1px; }
  .arrow { display: none; }
}