@import url('https://fonts.googleapis.com/css2?family=Geist:wght@300;400;500&family=Geist+Mono:wght@400;500&display=swap');

/* ─── Reset ─────────────────────────────────────────────── */

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

:root {
  --bg:      #0c0c0c;
  --fg:      #f0f0eb;
  --muted:   #555;
  --border:  #1e1e1e;
  --sans:    'Geist', ui-sans-serif, system-ui, sans-serif;
  --mono:    'Geist Mono', ui-monospace, monospace;
}

html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ─── Nav ───────────────────────────────────────────────── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: center;
}

.wordmark {
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  opacity: 0.6;
}

/* ─── Acts (sections) ───────────────────────────────────── */

.act {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 8rem 2rem;
}

.act-inner {
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
}

.act-inner.center {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ─── Labels ────────────────────────────────────────────── */

.mono-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
}

/* ─── ACT 1: Hook ───────────────────────────────────────── */

.act-hook {
  position: relative;
  min-height: 100vh;
}

.hook-line {
  font-family: var(--sans);
  font-size: clamp(1.8rem, 4.2vw, 4rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--fg);
  white-space: nowrap;
  margin-top: 0;
}

.act-hook .act-inner {
  max-width: 1100px;
}

.hook-dot {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.hook-dot.visible {
  opacity: 1;
}

.scroll-hint {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.scroll-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--muted);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50%       { transform: translateY(8px); opacity: 1; }
}

/* ─── ACT 2: Numbers ────────────────────────────────────── */

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem 3rem;
  margin: 3rem 0;
  width: 100%;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.stat-num {
  font-family: var(--sans);
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--fg);
}

.stat-desc {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  line-height: 1.5;
  max-width: 180px;
}

.numbers-coda {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 560px;
  margin-top: 1rem;
}

/* ─── ACT 3: Tagline ────────────────────────────────────── */

.tagline {
  font-family: var(--sans);
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 2rem;
}

.tagline-sub {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 440px;
}

/* ─── ACT 4–6: Shared section styles ───────────────────── */

.section-heading {
  font-family: var(--sans);
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--fg);
  margin-bottom: 1.5rem;
}

.section-body {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: 3.5rem;
}

.section-body.narrow {
  max-width: 480px;
}

/* ─── Blocker stat ──────────────────────────────────────── */

.blocker-stat {
  display: flex;
  align-items: baseline;
  gap: 2rem;
  margin-bottom: 3.5rem;
}

.blocker-stat .stat-num {
  font-size: clamp(3rem, 7vw, 5.5rem);
  flex-shrink: 0;
}

.blocker-stat .stat-desc {
  max-width: 380px;
  text-align: left;
}

/* ─── Mechanism cards ───────────────────────────────────── */

.mechanism-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-top: 3rem;
}

.mechanism-card {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mech-anim {
  height: 80px;
  display: flex;
  align-items: center;
  color: var(--fg);
}

.mech-peer { gap: 1.8rem; }


.mech-incentive { gap: 1.8rem; align-items: center; }

.incentive-chip { display: flex; align-items: center; gap: 0.6rem; }

.mechanism-text h4 {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.mechanism-text p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ─── Why grid ──────────────────────────────────────────── */

.why-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 4rem;
  margin-top: 3rem;
}

.why-item {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
}

.why-item h4 {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.why-item p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ─── Steps ─────────────────────────────────────────────── */

.steps {
  list-style: none;
  margin-top: 2.5rem;
  width: 100%;
  max-width: 640px;
}

.steps li {
  display: flex;
  gap: 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  align-items: flex-start;
}

.steps li:last-child {
  border-bottom: 1px solid var(--border);
}

.step-n {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  padding-top: 0.25rem;
  flex-shrink: 0;
  width: 1.5rem;
}

.steps strong {
  display: block;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--fg);
  margin-bottom: 0.35rem;
  letter-spacing: -0.01em;
}

.steps p {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.65;
}

/* ─── Closing ───────────────────────────────────────────── */

.closing-heading {
  font-size: clamp(1.8rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.act-closing p {
  font-size: 0.95rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.email-link {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2px;
  transition: border-color 0.2s;
}

.email-link:hover {
  border-color: var(--fg);
}

/* ─── Footer ────────────────────────────────────────────── */

footer {
  padding: 2rem 2.5rem;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-copy {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--muted);
}

/* ─── Scroll-pinned animation ───────────────────────────── */

.anim-wrapper {
  height: 400vh;
  position: relative;
}

.anim-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--fg);
}

.anim-label {
  margin-bottom: 2.5rem;
  opacity: 1;
  transform: none;
}

/*
  Canvas is 640px wide. Phone is centered (left: 50%, transform: translate(-50%,-50%)).
  Phone center = 320px from canvas left.

  Chip (110px wide, r=55 center):
    Scene 1 center: 320 + 180 + 55 = 555px  → translate(180px)
    Scene 2 center: 320 + (-55) + 55 = 320px → translate(-55px) [into phone, scale down]
    Scene 3 center: 320 + (-323) + 55 = 52px  → translate(-323px) [to charity]

  Charity (44px wide, center=22px):
    Left: 50% + translate(-342px) → canvas left = 320 - 342 = -22px + 22px center = 0px
    Adjusted: translate(-298px) → canvas left = 320 - 298 = 22px, center = 22+22 = 44px
    Keep charity at: translate(-300px) → center at 320-300+22 = 42px ≈ matches scene 3 chips
*/

/*
  Layout (960px canvas, 4 scenes):
  Phone  340×180  left:60px   → center x=230
  Chip   170×170  left:395px  → center x=480 (canvas center)

  Scene 1: chip hidden behind phone  → translateX(-250px) → center=230  (chip right=315 < phone right=400 ✓)
  Scene 2: chip at center            → translateX(0)      → center=480
  Scene 3: chip back into phone      → translateX(-250px) → center=230  (same as scene 1)
  Scene 4: chip at charity           → translateX(+320px) → center=800
  Charity label: left=715px width=170px (matches chip center 800 in scene 4)

  Stripe fix: r=73, circumference=2π×73≈458.7px, 12 even segments → dasharray="19.11 19.11"
*/

.anim-wrapper { height: 400vh; }

.anim-canvas {
  position: relative;
  width: 960px;
  height: 360px;
}

/* Phone — left of center, rendered on top to occlude chip */
.phone-wrap {
  position: absolute;
  left: -100px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--fg);
  z-index: 2;
}

/* Chip — starts at canvas center */
.chips-wrap {
  position: absolute;
  left: 395px;
  top: 50%;
  transform: translateY(-50%);
  transition: transform 0.9s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--fg);
  z-index: 1;
}

.anim-stage[data-scene="1"] .chips-wrap { transform: translate(-380px, -50%); }
.anim-stage[data-scene="2"] .chips-wrap { transform: translateY(-50%); }
.anim-stage[data-scene="3"] .chips-wrap { transform: translate(-380px, -50%); }
.anim-stage[data-scene="4"] .chips-wrap { transform: translate( 320px, -50%); }

/* Charity label — far right, appears below chip in scene 4 */
.charity-text {
  position: absolute;
  left: 715px;
  width: 170px;
  top: calc(50% + 97px);
  text-align: center;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  opacity: 0;
  transition: opacity 0.5s ease 0.5s;
  z-index: 0;
}

.anim-stage[data-scene="4"] .charity-text { opacity: 0.65; }

/* Scene captions — swap below canvas on scene change */
.scene-captions {
  position: relative;
  height: 1.4rem;
  margin-top: 2.5rem;
  width: 100%;
  text-align: center;
}

.scene-caption {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.anim-stage[data-scene="1"] .scene-caption[data-for-scene="1"],
.anim-stage[data-scene="2"] .scene-caption[data-for-scene="2"],
.anim-stage[data-scene="3"] .scene-caption[data-for-scene="3"],
.anim-stage[data-scene="4"] .scene-caption[data-for-scene="4"] {
  opacity: 1;
}

/* ─── Reveal animations ─────────────────────────────────── */

.reveal,
.reveal-item {
  opacity: 0;
  transform: translateY(44px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0, 0, 1);
}

.reveal.visible,
.reveal-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ────────────────────────────────────────── */

@media (max-width: 640px) {
  nav {
    padding: 1.25rem 1.5rem;
  }

  .act {
    padding: 6rem 1.5rem;
  }

  .stat-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  /* Animation — scaled to ~0.375 of desktop (960→360px) */
  .anim-canvas { width: 360px; height: 135px; }

  .phone-wrap { left: 22px; }
  .phone-wrap svg { width: 128px; height: 68px; }

  .chips-wrap { left: 148px; }
  .chips-wrap svg { width: 64px; height: 64px; }

  .anim-stage[data-scene="1"] .chips-wrap { transform: translate(-94px, -50%); }
  .anim-stage[data-scene="2"] .chips-wrap { transform: translateY(-50%); }
  .anim-stage[data-scene="3"] .chips-wrap { transform: translate(-94px, -50%); }
  .anim-stage[data-scene="4"] .chips-wrap { transform: translate(120px, -50%); }

  .charity-text { left: 268px; width: 64px; top: calc(50% + 38px); font-size: 0.52rem; }

  .mechanism-cards {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .why-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  footer {
    padding: 1.5rem;
  }
}