/* PaceStreak — landing page
   Single stylesheet, no build step, no external requests. */

:root {
  --bg: #0a0a0b;
  --bg-alt: #0e0e10;
  --surface: #141417;
  --surface-2: #1a1a1e;
  --border: #26262c;
  --border-lit: #34343d;

  --text: #f4f4f5;
  --muted: #a1a1aa;
  --dim: #71717a;

  --accent: #d3ff3e; /* electric lime */
  --accent-ink: #14170a; /* text on accent */
  --flame: #ff6b35;

  --radius: 14px;
  --radius-lg: 20px;
  --wrap: 1120px;

  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* A soft glow behind the fold, so the page doesn't read as a flat black box. */
body::before {
  content: "";
  position: fixed;
  inset: -30vh 0 auto 0;
  height: 90vh;
  background: radial-gradient(
    60% 55% at 50% 0%,
    rgba(211, 255, 62, 0.09),
    transparent 70%
  );
  pointer-events: none;
  z-index: 0;
}

img,
svg {
  max-width: 100%;
}

a {
  color: inherit;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.wrap--narrow {
  max-width: 760px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 16px;
  border-radius: 0 0 10px 0;
  font-weight: 700;
  z-index: 100;
}
.skip:focus {
  left: 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------------------------------------------------------------- Nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 1.06rem;
  white-space: nowrap;
}

.brand__mark {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex: none;
}

.brand__word span {
  color: var(--muted);
  font-weight: 700;
}

.nav__links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 0.95rem;
}

.nav__links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s ease;
}
.nav__links a:hover {
  color: var(--text);
}

/* ------------------------------------------------------------- Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 22px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 700;
  font-size: 0.97rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 26px rgba(211, 255, 62, 0.22);
}

.btn--sm {
  padding: 9px 16px;
  font-size: 0.9rem;
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border-lit);
}
.btn--ghost:hover {
  background: var(--surface-2);
  box-shadow: none;
  border-color: var(--muted);
}

/* ---------------------------------------------------------------- Hero */

.hero {
  padding: clamp(56px, 9vw, 104px) 0 clamp(40px, 6vw, 72px);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(211, 255, 62, 0.14);
}

.hero__title {
  margin: 0 0 20px;
  font-size: clamp(2.6rem, 6.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.grad {
  background: linear-gradient(96deg, var(--accent), var(--flame));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  margin: 0 0 30px;
  font-size: clamp(1.02rem, 1.5vw, 1.14rem);
  color: var(--muted);
  max-width: 54ch;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}

.hero__note {
  margin: 0;
  font-size: 0.88rem;
  color: var(--dim);
}

/* ----------------------------------------------------------- Streak card */

.grid-card {
  margin: 0;
  padding: 22px;
  background: linear-gradient(180deg, var(--surface), var(--bg-alt));
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.grid-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.grid-card__label {
  margin: 0 0 4px;
  font-size: 0.76rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--dim);
  font-weight: 700;
}

.grid-card__streak {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.flame {
  font-size: 1.5rem;
  line-height: 1;
}

.grid-card__streak .unit {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0;
}

.grid-card__stats {
  display: flex;
  gap: 22px;
  margin: 0;
  text-align: right;
}

.grid-card__stats dt {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
  font-weight: 700;
}

.grid-card__stats dd {
  margin: 2px 0 0;
  font-size: 1.15rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* The activity grid: columns are weeks, rows are weekdays. */
.heat {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 14px;
}

/* No background here on purpose: `.heat i` would be specificity 0-1-1 and
   would beat the single-class .lvl--N rules below, flattening every cell to
   one colour. The level class is the only thing that paints a cell. */
.heat i {
  aspect-ratio: 1;
  border-radius: 3px;
  display: block;
}

.lvl--0 { background: #1c1c21; }
.lvl--1 { background: rgba(211, 255, 62, 0.26); }
.lvl--2 { background: rgba(211, 255, 62, 0.48); }
.lvl--3 { background: rgba(211, 255, 62, 0.72); }
.lvl--4 { background: var(--accent); }

.heat__legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 5px;
  font-size: 0.74rem;
  color: var(--dim);
}

.heat__legend i {
  width: 11px;
  height: 11px;
  border-radius: 3px;
  display: block;
}

/* ------------------------------------------------------------ Sections */

.section {
  padding: clamp(64px, 8vw, 104px) 0;
}

.section--alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border);
}

.h2 {
  margin: 0 0 44px;
  font-size: clamp(1.85rem, 3.6vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: -0.032em;
  font-weight: 800;
  max-width: 20ch;
}

/* --------------------------------------------------------------- Steps */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.step__n {
  display: block;
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}

.step h3,
.card h3 {
  margin: 0 0 9px;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.step p,
.card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

/* --------------------------------------------------------------- Cards */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  padding: 26px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.card:hover {
  border-color: var(--border-lit);
  transform: translateY(-2px);
}

.card h3 span {
  margin-right: 7px;
}

/* ----------------------------------------------------------------- CTA */

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

.cta .h2 {
  max-width: none;
  margin-bottom: 16px;
}

.cta__lead {
  margin: 0 0 28px;
  color: var(--muted);
  max-width: 56ch;
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 18px;
}

.cta__note {
  margin: 0;
  font-size: 0.86rem;
  color: var(--dim);
}

/* ----------------------------------------------------------------- FAQ */

.faq {
  border-bottom: 1px solid var(--border);
  padding: 4px 0;
}

.faq summary {
  cursor: pointer;
  padding: 17px 0;
  font-weight: 650;
  font-size: 1.03rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.4rem;
  font-weight: 400;
  line-height: 1;
  flex: none;
}

.faq[open] summary::after {
  content: "–";
}

.faq p {
  margin: 0 0 18px;
  color: var(--muted);
  max-width: 65ch;
  font-size: 0.97rem;
}

/* -------------------------------------------------------------- Footer */

.footer {
  padding: 34px 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.brand--sm {
  font-size: 0.97rem;
}

.footer__meta {
  margin: 0;
  color: var(--dim);
  font-size: 0.87rem;
}

.footer__meta a {
  color: var(--muted);
  text-decoration: none;
}
.footer__meta a:hover {
  color: var(--text);
  text-decoration: underline;
}

/* --------------------------------------------------------- Responsive */

@media (max-width: 900px) {
  .hero__inner {
    grid-template-columns: 1fr;
  }
  .steps,
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav__links {
    display: none;
  }
}

@media (max-width: 600px) {
  body {
    font-size: 16px;
  }
  .steps,
  .cards {
    grid-template-columns: 1fr;
  }
  .grid-card__top {
    flex-direction: column;
  }
  .grid-card__stats {
    text-align: left;
  }
  .heat {
    gap: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* Grid cells fade in as the page settles. app.js sets the per-cell delay;
   without JS the cells are simply visible, which is the correct fallback. */
@keyframes cellIn {
  from {
    opacity: 0;
    transform: scale(0.72);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}