/* ============================================================
   Seeble — shared styles
   Apple/Uber aesthetic: light, white, airy, minimal, refined
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  --white: #ffffff;
  --grey: #f4f4f6;        /* soft grey surfaces for tonal rhythm */
  --ink: #1d1d1f;         /* near-black, not stark */
  --hairline: #e7e7ea;    /* refined hairline */
  --muted: #6b6b71;       /* muted grey for secondary text / hierarchy */
  --coral: #1d1d1f;       /* mono system: accent == ink */

  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 28px;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.03), 0 2px 8px rgba(0,0,0,0.03);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.04), 0 10px 30px rgba(0,0,0,0.05);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.04), 0 24px 60px rgba(0,0,0,0.07);

  --nav-h: 60px;
  --maxw: 1160px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.55;
  font-weight: 400;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Type ---------- */
h1, h2, h3 { letter-spacing: -0.035em; font-weight: 700; line-height: 1.05; }
.eyebrow {
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted);
}
.lead { font-size: 19px; color: var(--muted); font-weight: 450; line-height: 1.62; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-weight: 600; font-size: 15px;
  padding: 13px 24px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; transition: transform .25s var(--ease), background .2s, box-shadow .25s, color .2s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-dark { background: var(--ink); color: var(--white); box-shadow: 0 1px 2px rgba(0,0,0,0.10); }
.btn-dark:hover { background: #000; box-shadow: 0 10px 28px rgba(0,0,0,0.20); transform: translateY(-1px); }
.btn-light { background: var(--white); color: var(--ink); border: 1px solid var(--hairline); }
.btn-light:hover { background: var(--grey); border-color: #dcdce0; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--grey); }
.btn-lg { padding: 16px 30px; font-size: 16px; }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h); display: flex; align-items: center;
  background: rgba(255,255,255,0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, background .3s;
}
.nav.scrolled { border-bottom-color: var(--hairline); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; font-weight: 800; font-size: 32px; letter-spacing: -0.05em; }
.brand .dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(0,0,0,0.08);
}
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  font-size: 14.5px; font-weight: 500; color: var(--ink);
  padding: 8px 14px; border-radius: 999px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--ink); background: var(--grey); }
.nav-links a.active { color: var(--ink); font-weight: 700; }
.nav-cta { display: flex; align-items: center; gap: 8px; }

.menu-btn { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-btn span { display: block; width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }
.menu-btn span + span { margin-top: 5px; }

/* ---------- Sections ---------- */
section { position: relative; }
.section-pad { padding: 120px 0; }
.section-pad-sm { padding: 80px 0; }
.center { text-align: center; }
.section-head { max-width: 720px; }
.center .section-head { margin: 0 auto; }
.section-head.center { margin: 0 auto; }
.section-head h2 { font-size: clamp(32px, 4.5vw, 52px); margin: 16px 0 0; }
.section-head .lead { margin-top: 18px; }

/* ---------- Footer (dark) ---------- */
.footer { background: var(--ink); color: #fff; border-top: 1px solid rgba(255,255,255,0.10); padding: 72px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.8fr repeat(2, 1fr); gap: 40px; }
.footer .brand { font-size: 21px; margin-bottom: 14px; color: #fff; }
.footer-col h4 { font-size: 13px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: rgba(255,255,255,0.5); margin-bottom: 16px; }
.footer-col a { display: block; font-size: 15px; font-weight: 500; color: #fff; padding: 6px 0; transition: color .2s; }
.footer-col a:hover { text-decoration: underline; text-underline-offset: 3px; }
.footer-blurb { color: rgba(255,255,255,0.6); font-size: 15px; font-weight: 500; max-width: 280px; line-height: 1.6; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px;
  margin-top: 56px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 13.5px; color: rgba(255,255,255,0.5); font-weight: 500;
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }
.reveal[data-d="5"] { transition-delay: .40s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Image placeholder (for illustrations later) ---------- */
.art-slot {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: var(--grey);
  border: 1px solid var(--hairline);
  display: flex; align-items: center; justify-content: center;
}
.art-slot span {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 11.5px; color: rgba(17,17,19,0.5); letter-spacing: .02em;
}

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section-pad { padding: 84px 0; }
}
@media (max-width: 720px) {
  .nav-links, .nav-cta .btn-ghost { display: none; }
  .menu-btn { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column; align-items: stretch;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: var(--white); border-bottom: 1px solid var(--hairline);
    padding: 12px; gap: 2px;
  }
  .nav-links.open a { padding: 12px 14px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Whisper of depth on the dark moments ---------- */
.promise, .cta, .steps-sec, .band, .feat.inv {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.07);
}