/* ===== Tokens ===== */
:root {
  --navy-900: #0b1020;
  --navy-800: #0f1530;
  --navy-700: #141b3c;
  --blue: #2563eb;
  --blue-bright: #3b82f6;
  --indigo: #6366f1;
  --ink: #0f172a;
  --slate: #475569;
  --slate-light: #64748b;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --card: #ffffff;
  --header-h: 76px;
  --maxw: 1200px;
  --radius: 16px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 2px 8px rgba(15, 23, 42, .05);
  --shadow-md: 0 10px 30px rgba(15, 23, 42, .08);
  --slide-canvas: #e8ecf2;
  --slide-gutter: 62px;
  --slide-snap-top: 52px;
  --slide-radius: 20px;
  --slide-border: #d8dee8;
  --slide-shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 6px 24px rgba(15, 23, 42, .08);
  --slide-pad-x: clamp(48px, 6vw, 88px);
  --slide-pad-top: clamp(64px, 9vh, 112px);
  --slide-pad-bottom: clamp(64px, 7vh, 96px);
  --slide-col-gap: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
  scroll-padding-top: var(--slide-snap-top);
  scroll-padding-right: var(--slide-gutter);
  scroll-padding-bottom: var(--slide-gutter);
  scroll-padding-left: var(--slide-gutter);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--slide-canvas);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--slide-pad-top) var(--slide-pad-x) var(--slide-pad-bottom);
}

.accent {
  background: linear-gradient(90deg, var(--blue), var(--indigo));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.grad {
  background: linear-gradient(90deg, #60a5fa, #818cf8 55%, #a78bfa);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ===== Floating hamburger ===== */
.hamburger {
  position: fixed;
  top: calc(var(--slide-gutter) + 12px);
  left: calc(var(--slide-gutter) + 12px);
  z-index: 130;
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 11px;
  background: rgba(255, 255, 255, .9); backdrop-filter: saturate(180%) blur(10px);
  color: var(--ink); font-size: 20px; cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .15s ease;
}
.hamburger:hover { background: var(--blue); border-color: var(--blue); color: #fff; transform: translateY(-1px); }
body.menu-open .hamburger { opacity: 0; visibility: hidden; pointer-events: none; }

/* ===== Reusable SVG logo ===== */
.pg-logo { display: block; width: auto; color: #fff; }
.pg-mark { display: block; width: auto; }

/* ===== Optional per-slide footer (logo + number) ===== */
.slide-footer {
  display: none;
  position: absolute; left: 50%; transform: translateX(-50%);
  bottom: 28px; z-index: 5;
  width: 100%; max-width: var(--maxw);
  padding: 0 var(--slide-pad-x);
  align-items: center; justify-content: space-between;
  pointer-events: none;
}
body.show-slide-footers .slide-footer { display: flex; }
.slide-footer .sf-logo { height: 32px; color: var(--ink); opacity: .8; }
.slide-footer .sf-num { font-size: 13px; font-weight: 800; letter-spacing: .12em; color: var(--slate-light); }
.slide-footer--light .sf-logo { color: #fff; opacity: .92; }
.slide-footer--light .sf-num { color: rgba(255, 255, 255, .65); }

/* ===== Side menu ===== */
.menu-overlay {
  position: fixed; inset: 0; z-index: 110;
  background: rgba(8, 12, 28, .55); backdrop-filter: blur(2px);
  opacity: 0; visibility: hidden; transition: opacity .3s ease, visibility .3s ease;
}
.menu-overlay.open { opacity: 1; visibility: visible; }

.side-menu {
  position: fixed; top: 0; left: 0; z-index: 120;
  width: 380px; max-width: 90vw; height: 100%;
  background: linear-gradient(180deg, var(--navy-800), var(--navy-900));
  color: #fff; padding: 28px 28px 40px;
  transform: translateX(-100%); transition: transform .35s cubic-bezier(.4, 0, .2, 1);
  box-shadow: 20px 0 60px rgba(0, 0, 0, .35);
  display: flex; flex-direction: column;
}
.side-menu.open { transform: translateX(0); }
.side-menu-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; }
.side-menu-title {
  text-transform: uppercase; letter-spacing: .18em; font-size: 12px;
  font-weight: 700; color: #93a4cf;
}
.menu-close {
  width: 44px; height: 44px; border-radius: 10px; border: 1px solid rgba(255, 255, 255, .14);
  background: rgba(255, 255, 255, .05); color: #fff; font-size: 22px; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; transition: background .2s ease;
}
.menu-close:hover { background: rgba(255, 255, 255, .14); }

.side-menu-links { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.side-menu-links a {
  display: flex; align-items: center; gap: 16px;
  padding: 13px 14px; border-radius: 12px;
  color: #cbd5e1; text-decoration: none; font-size: 17px; font-weight: 500;
  transition: background .2s ease, color .2s ease, padding-left .2s ease;
}
.side-menu-links a:hover {
  background: rgba(99, 102, 241, .16); color: #fff; padding-left: 20px;
}
.side-menu-links .num {
  font-size: 12px; font-weight: 700; color: #6b7bb0;
  width: 26px; letter-spacing: .05em;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 14px 26px; border-radius: 12px; font-weight: 600; font-size: 16px;
  text-decoration: none; cursor: pointer; transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn i { font-size: 18px; }
.btn-primary {
  background: linear-gradient(90deg, var(--blue), var(--indigo)); color: #fff;
  box-shadow: 0 8px 24px rgba(37, 99, 235, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(37, 99, 235, .45); }
.btn-ghost { background: rgba(255, 255, 255, .08); color: #fff; border: 1px solid rgba(255, 255, 255, .25); }
.btn-ghost:hover { background: rgba(255, 255, 255, .16); }

/* ===== Page / slide layout ===== */
main {
  background: var(--slide-canvas);
  padding: var(--slide-snap-top) 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--slide-gutter);
}
main > section {
  position: relative;
  width: calc(100% - (var(--slide-gutter) * 2));
  max-width: 100%;
  margin: 0 auto;
  min-height: calc(100vh - (var(--slide-gutter) * 2));
  min-height: calc(100dvh - (var(--slide-gutter) * 2));
  border: 1px solid var(--slide-border);
  border-radius: var(--slide-radius);
  background: var(--bg);
  box-shadow: var(--slide-shadow);
  overflow: hidden;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  scroll-margin-top: var(--slide-snap-top);
  scroll-margin-right: var(--slide-gutter);
  scroll-margin-bottom: var(--slide-gutter);
  scroll-margin-left: var(--slide-gutter);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
main > section.section-alt { background: var(--bg-alt); }

/* ===== Section base ===== */
.section > .container { width: 100%; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 760px; margin-bottom: 48px; }
.eyebrow {
  display: inline-block; text-transform: uppercase; letter-spacing: .16em;
  font-size: 13px; font-weight: 700; color: var(--blue); margin-bottom: 14px;
}
h2 { font-size: 42px; line-height: 1.15; font-weight: 800; letter-spacing: -.02em; }
.lead { margin-top: 18px; font-size: 19px; color: var(--slate); }
/* ===== Hero ===== */
.hero {
  position: relative;
  display: flex;
  align-items: flex-start;
  color: #fff;
}
.hero-bg {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 11, 24, 0.82) 0%, rgba(7, 11, 24, 0.45) 42%, rgba(7, 11, 24, 0.2) 100%),
    linear-gradient(125deg, rgba(11, 16, 32, 0.55), rgba(20, 27, 60, 0.35)),
    url('https://images.unsplash.com/photo-1658567695327-8ee7a1452f84?auto=format&fit=crop&w=2000&q=80');
  background-size: cover;
  background-position: center bottom;
}
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 11, 24, 0.78) 0%, rgba(7, 11, 24, 0.35) 45%, transparent 72%),
    radial-gradient(900px 500px at 80% 45%, rgba(99, 102, 241, 0.22), transparent 70%);
}
.hero-content {
  position: relative; z-index: 2;
  width: 100%; max-width: var(--maxw); margin: 0 auto;
  padding: var(--slide-pad-top) var(--slide-pad-x) var(--slide-pad-bottom);
}
.hero-logo { height: 64px; margin-bottom: 36px; }
.hero-title { font-size: 68px; line-height: 1.08; font-weight: 900; letter-spacing: -.03em; }
.hero-sub { margin-top: 26px; font-size: 22px; color: #c7d2fe; max-width: 640px; }
.hero-actions { margin-top: 42px; display: flex; align-items: center; gap: 28px; }
.hero-handle { margin-left: auto; display: inline-flex; align-items: center; gap: 7px; color: #93a4cf; font-weight: 500; }

/* ===== Cards / grids ===== */
.grid { display: grid; gap: 26px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #c7d2fe; }
.card-center { text-align: center; }
.card-center .card-icon { margin: 0 auto 18px; }
.card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--slate); font-size: 15px; }
.card-icon {
  width: 56px; height: 56px; border-radius: 14px; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; color: var(--blue);
  background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(99, 102, 241, .12));
}

/* ===== Problem ===== */
.problem-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--slide-col-gap); align-items: start; }
.problem-intro .lead { max-width: 420px; }
.problem-list { list-style: none; display: flex; flex-direction: column; gap: 28px; }
.problem-list li { display: flex; gap: 18px; align-items: flex-start; }
.problem-icon {
  flex: none; width: 80px; height: 80px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 36px; color: var(--blue);
  background: #eef2f7;
}
.problem-list h3 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.problem-list p { color: var(--slate); font-size: 15px; line-height: 1.55; }

/* ===== Solution ===== */
.solution-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--slide-col-gap); align-items: center; }
.solution-graphic { margin-top: 44px; display: flex; justify-content: center; }
.pg-mark { height: 140px; filter: drop-shadow(0 20px 44px rgba(37, 99, 235, .35)); }
.solution-list { list-style: none; display: flex; flex-direction: column; gap: 22px; }
.solution-list li { display: flex; gap: 18px; align-items: flex-start; background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 22px 24px; box-shadow: var(--shadow-sm); }
.li-icon { flex: none; width: 50px; height: 50px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 26px; color: #fff; background: linear-gradient(135deg, var(--blue), var(--indigo)); }
.solution-list h3 { font-size: 19px; margin-bottom: 4px; }
.solution-list p { color: var(--slate); }

/* ===== Flow ===== */
.flow { display: flex; align-items: stretch; justify-content: space-between; gap: 8px; }
.flow-step { flex: 1; text-align: center; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 16px; box-shadow: var(--shadow-sm); }
.flow-icon { width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 30px; color: var(--blue); background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(99, 102, 241, .12)); }
.flow-step h3 { font-size: 18px; }
.flow-step p { color: var(--slate); font-size: 14px; }
.flow-arrow { display: flex; align-items: center; color: var(--blue); font-size: 26px; opacity: .55; }
.flow-footer { margin-top: 44px; text-align: center; font-size: 22px; font-weight: 700; color: var(--ink); }
.flow-footer { background: linear-gradient(90deg, var(--blue), var(--indigo)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ===== Impact ===== */
.impact-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--slide-col-gap); align-items: center; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-content: center; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; box-shadow: var(--shadow-sm); }
.stat-num { display: block; font-size: 46px; font-weight: 900; letter-spacing: -.02em; background: linear-gradient(90deg, var(--blue), var(--indigo)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-label { color: var(--slate); font-size: 15px; }
.impact-table { background: var(--navy-900); border-radius: var(--radius); padding: 30px; color: #fff; box-shadow: var(--shadow-md); }
.impact-table-title { font-size: 16px; font-weight: 700; color: #c7d2fe; margin-bottom: 18px; }
.impact-table table { width: 100%; border-collapse: collapse; }
.impact-table th, .impact-table td { text-align: left; padding: 13px 12px; font-size: 15px; border-bottom: 1px solid rgba(255, 255, 255, .08); }
.impact-table thead th { color: #93a4cf; font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: .05em; }
.impact-table td:first-child { color: #cbd5e1; }
.impact-table .after { color: #7dd3fc; font-weight: 700; }
.impact-table thead .after { color: #38bdf8; }

/* ===== Developers / code ===== */
.dev-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--slide-col-gap); align-items: center; }
.check-list { list-style: none; display: flex; flex-direction: column; gap: 20px; margin-top: 28px; }
.check-list li { display: flex; gap: 14px; align-items: flex-start; }
.check-list li > i { color: var(--blue); font-size: 24px; flex: none; margin-top: 2px; }
.check-list strong { display: block; font-size: 17px; }
.check-list span { color: var(--slate); font-size: 15px; }
.code-window { background: #0d1326; border-radius: var(--radius); overflow: hidden; box-shadow: 0 20px 50px rgba(8, 12, 28, .35); border: 1px solid rgba(255, 255, 255, .06); }
.code-bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; background: #11182f; border-bottom: 1px solid rgba(255, 255, 255, .06); }
.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background: #ff5f57; } .dot.yellow { background: #febc2e; } .dot.green { background: #28c840; }
.code-file { margin-left: 12px; color: #8a96bd; font-size: 13px; }
.code-body { padding: 24px 26px; font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace; font-size: 15px; line-height: 1.8; color: #e2e8f0; overflow-x: auto; }
.c-method { color: #34d399; font-weight: 700; }
.c-path { color: #93c5fd; }
.c-key { color: #c4b5fd; }
.c-str { color: #fbbf24; }
.c-num { color: #38bdf8; }
.c-comment { color: #64748b; }

/* ===== Market ===== */
.market-layout { display: grid; grid-template-columns: 1fr 1.1fr; gap: var(--slide-col-gap); align-items: center; }
.market-callouts { display: flex; gap: 40px; margin: 30px 0 6px; }
.callout-num { display: block; font-size: 52px; font-weight: 900; letter-spacing: -.02em; background: linear-gradient(90deg, var(--blue), var(--indigo)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.callout-label { color: var(--slate); font-size: 15px; max-width: 200px; display: inline-block; }
.chart-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 28px; box-shadow: var(--shadow-md); }
.chart-title { font-size: 14px; font-weight: 700; color: var(--slate); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 8px; }
.market-chart { width: 100%; height: auto; display: block; }
.market-chart .grid-lines line { stroke: var(--line); stroke-width: 1; }
.market-chart .axis-label text { fill: var(--slate-light); font-size: 12px; font-family: 'Inter', sans-serif; }
.market-chart .line-path { stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.market-chart .points circle { fill: #fff; stroke: var(--blue); stroke-width: 3; }

/* ===== Why ===== */
.why-layout { display: grid; grid-template-columns: 1fr 1fr; gap: var(--slide-col-gap); align-items: start; }
.why-mark { margin-top: 36px; display: flex; align-items: center; justify-content: center; }
.why-mark .pg-mark { height: 120px; width: auto; }
.why-layout .check-list li { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; box-shadow: var(--shadow-sm); }

/* ===== CTA ===== */
.cta {
  position: relative;
  color: #fff;
  overflow: hidden;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
}
.cta-bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(800px 400px at 50% 0%, rgba(99, 102, 241, .45), transparent 70%),
    linear-gradient(160deg, rgba(11, 16, 32, .93), rgba(20, 27, 60, .85)),
    url('https://images.unsplash.com/photo-1707332287886-84315bbb04bb?auto=format&fit=crop&w=2000&q=80');
  background-size: cover; background-position: center;
}
.cta-content {
  position: relative; z-index: 2;
  width: 100%; max-width: var(--maxw); margin: 0 auto;
  padding: var(--slide-pad-top) var(--slide-pad-x) var(--slide-pad-bottom);
}
.cta-content h2 { font-size: 54px; }
.cta-content p { margin: 26px auto 0; font-size: 20px; color: #c7d2fe; max-width: 640px; }
.cta-actions { margin-top: 40px; display: flex; gap: 18px; justify-content: center; }
.cta-logo { height: 54px; margin: 56px auto 0; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.hero.reveal { opacity: 1; transform: none; }

/* ===== Print / export to PDF (one slide per page) ===== */
@media print {
  @page { size: 1280px 720px; margin: 0; }

  html { scroll-snap-type: none; }

  html, body {
    background: #fff;
    width: 1280px;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .hamburger, .menu-overlay, .side-menu { display: none !important; }

  main {
    padding: 0;
    margin: 0;
    gap: 0;
    display: block;
  }

  main > section {
    width: 1280px;
    max-width: none;
    min-height: 720px;
    height: 720px;
    margin: 0;
    border: none;
    border-radius: 0;
    box-shadow: none;
    overflow: hidden;
    break-after: page;
    page-break-after: always;
    break-inside: avoid;
    page-break-inside: avoid;
  }
  main > section:last-child { break-after: auto; page-break-after: auto; }

  /* Always show all content regardless of scroll reveal state */
  .reveal { opacity: 1 !important; transform: none !important; }
}