/* TubeFactory public site - plain CSS, no external fonts or assets */
:root {
  --ink: #0f172a;
  --text: #334155;
  --muted: #64748b;
  --bg: #ffffff;
  --soft: #f6f7fb;
  --line: #e2e8f0;
  --brand: #4338ca;
  --brand-dark: #3730a3;
  --brand-soft: #eef2ff;
  --ok: #047857;
  --radius: 14px;
  --wrap: 1080px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

h1, h2, h3 { color: var(--ink); line-height: 1.25; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -.01em; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
a { color: var(--brand); }
a:hover { color: var(--brand-dark); }
code {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: .85em;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: .1em .35em;
  overflow-wrap: anywhere;
}

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
  position: sticky;
  top: 0;
  z-index: 10;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
}
.brand { display: inline-flex; align-items: center; }
.brand img { display: block; height: 34px; width: auto; }
.nav { display: flex; align-items: center; gap: 22px; }
.nav a { color: var(--text); text-decoration: none; font-size: .95rem; }
.nav a:hover { color: var(--brand); }
.nav .btn { color: #fff; }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: .95rem;
  padding: .65em 1.2em;
  border-radius: 10px;
  border: 1px solid var(--brand);
}
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: #fff; }
.btn-ghost { background: #fff; color: var(--brand); border-color: var(--line); }
.btn-ghost:hover { background: var(--brand-soft); color: var(--brand-dark); border-color: var(--brand-soft); }

/* Hero */
.hero { padding: 72px 0 64px; background: linear-gradient(180deg, var(--brand-soft) 0%, #fff 100%); }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 14px;
}
.lead { font-size: 1.15rem; color: var(--text); max-width: 36em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 14px; }
.note { font-size: .9rem; color: var(--muted); }

/* Illustration card */
.mock {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 20px 45px -25px rgba(15, 23, 42, .35);
  padding: 22px;
}
.mock-title { font-size: .85rem; font-weight: 600; color: var(--ink); margin-bottom: 14px; }
.mock-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 18px; }
.mock-stat { background: var(--soft); border-radius: 10px; padding: 10px 12px; }
.mock-stat span { display: block; font-size: .72rem; color: var(--muted); }
.mock-bar { display: block; height: 10px; border-radius: 5px; background: #c7d2fe; margin-top: 8px; }
.mock svg { display: block; width: 100%; height: auto; }
.mock-caption { font-size: .75rem; color: var(--muted); margin: 10px 0 0; text-align: right; }

/* Sections */
.section { padding: 72px 0; }
.section-alt { background: var(--soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-head { max-width: 40em; margin-bottom: 36px; }

.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card p { font-size: .95rem; margin: 0; }
.icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}
.icon svg { width: 22px; height: 22px; }

/* Features (3 columns) and Revenue insights */
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-accent { border-color: #c7d2fe; background: var(--brand-soft); }
.section-revenue { background: linear-gradient(180deg, #fff 0%, var(--brand-soft) 100%); border-top: 1px solid var(--line); }
.section-revenue .card { border-top: 4px solid var(--brand); }
.tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--brand);
  background: var(--brand-soft);
  border-radius: 6px;
  padding: .15em .55em;
  margin-bottom: 10px;
}
.metric-note {
  margin: 28px 0 10px;
  padding: 12px 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--ok);
  border-radius: 10px;
  font-size: .95rem;
  color: var(--ink);
}

.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; counter-reset: step; }
.steps li { counter-increment: step; position: relative; padding-top: 48px; }
.steps li::before {
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.steps p { font-size: .95rem; margin: 0; }

.data-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.checks { list-style: none; padding: 0; margin: 0 0 1em; }
.checks li { position: relative; padding-left: 30px; margin-bottom: .7em; }
.checks li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .45em;
  width: 12px;
  height: 7px;
  border-left: 2.5px solid var(--ok);
  border-bottom: 2.5px solid var(--ok);
  transform: rotate(-45deg);
}
.pledge {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--brand);
  border-radius: 10px;
  padding: 18px 20px;
  font-size: .95rem;
}

/* Legal pages */
.doc { padding: 56px 0 72px; }
.doc .wrap { max-width: 800px; }
.doc h2 { font-size: 1.35rem; margin-top: 2.2em; padding-top: .2em; }
.doc h3 { margin-top: 1.5em; }
.doc ul { padding-left: 1.3em; }
.doc li { margin-bottom: .5em; }
.meta { color: var(--muted); font-size: .95rem; }
.toc {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 28px 0;
  font-size: .95rem;
}
.toc ol { margin: .4em 0 0; padding-left: 1.3em; columns: 2; column-gap: 32px; }
.table-wrap { overflow-x: auto; margin: 1em 0 1.5em; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { color: var(--ink); background: var(--soft); }

/* 404 */
.not-found { padding: 110px 0; text-align: center; }
.not-found .code { font-size: 4rem; font-weight: 800; color: var(--brand); line-height: 1; margin-bottom: 12px; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; font-size: .9rem; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.site-footer a { color: var(--text); text-decoration: none; }
.site-footer a:hover { color: var(--brand); text-decoration: underline; }

/* Responsive */
@media (max-width: 900px) {
  .hero .wrap, .data-box { grid-template-columns: 1fr; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  .nav a:not(.btn) { display: none; }
  .hero { padding: 48px 0 44px; }
  .section { padding: 52px 0; }
  .grid { grid-template-columns: 1fr; }
  .toc ol { columns: 1; }
  .mock-stats { grid-template-columns: 1fr 1fr 1fr; gap: 6px; }
}