/* ============================================================
   Watchbug — Landing page
   Design system: DESIGN.md (Apple) — Action Blue single accent,
   alternating full-bleed tiles, SF Pro, 17px body, pill CTAs.
   No gradients. Exactly one shadow (product imagery only).
   ============================================================ */

:root {
  /* Color tokens (DESIGN.md) */
  --canvas: #ffffff;
  --parchment: #f5f5f7;
  --pearl: #fafafc;
  --tile-1: #272729;
  --tile-2: #2a2a2c;
  --tile-3: #252527;
  --black: #000000;
  --ink: #1d1d1f;
  --on-dark: #ffffff;
  --muted-dark: #cccccc;
  --ink-80: #333333;
  --ink-muted: #5a5a5e; /* a11y-adjusted from #7a7a7a to pass 4.5:1 at 12px */
  --hairline: #e0e0e0;
  --divider: #f0f0f0;
  --blue: #0066cc;
  --blue-focus: #0071e3;
  --blue-dark: #2997ff;

  /* The single system shadow — product imagery only */
  --product-shadow: 3px 5px 30px rgba(0, 0, 0, 0.22);

  /* Typography */
  --font-display: "SF Pro Display", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-text: "SF Pro Text", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;

  /* Spacing */
  --section-pad: 80px;
  --container: 980px;
  --container-wide: 1120px;
  --nav-h: 44px;

  /* Radius scale */
  --r-sm: 8px;
  --r-md: 11px;
  --r-lg: 18px;
  --r-pill: 9999px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

:focus-visible {
  outline: 2px solid var(--blue-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--blue);
  color: #fff;
  padding: 10px 18px;
  z-index: 100;
  border-radius: var(--r-pill);
}

.skip-link:focus {
  left: 12px;
  top: 8px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.container--wide {
  max-width: var(--container-wide);
}

/* ---------- Typography ---------- */
h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 600;
  color: inherit;
  margin: 0;
}

h1 {
  font-size: 56px;
  line-height: 1.07;
  letter-spacing: -0.28px;
}

h2 {
  font-size: 40px;
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  font-size: 21px;
  line-height: 1.19;
  letter-spacing: 0.231px;
}

.lead {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: 0.196px;
  margin: 0;
}

.eyebrow {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.29;
  letter-spacing: -0.224px;
  color: var(--blue);
  text-transform: uppercase;
  margin: 0 0 16px;
}

.tile--dark .eyebrow {
  color: var(--blue-dark);
}

.fine {
  font-size: 12px;
  line-height: 1.35;
  letter-spacing: -0.12px;
  color: var(--ink-muted);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 22px;
  border: 0;
  border-radius: var(--r-pill);
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.47;
  letter-spacing: -0.374px;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, filter 0.15s ease, background-color 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  filter: brightness(1.1);
}

.btn:active {
  transform: scale(0.95);
}

.btn--primary {
  background: var(--blue);
  color: #ffffff;
}

.btn--ghost {
  background: var(--canvas);
  color: var(--blue);
  box-shadow: inset 0 0 0 1px var(--blue);
}

.tile--dark .btn--ghost {
  background: transparent;
  color: var(--blue-dark);
  box-shadow: inset 0 0 0 1px var(--blue-dark);
}

.btn--lg {
  padding: 14px 28px;
  font-size: 18px;
  font-weight: 300;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* ---------- Global nav (black, 44px, 12px links) ---------- */
.global-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--black);
  color: var(--on-dark);
  height: var(--nav-h);
}

.nav-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--on-dark);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.12px;
  white-space: nowrap;
}

.nav-logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

.nav-logo img {
  height: 24px;
  width: 24px;
  filter: invert(1); /* black shield → white on black nav */
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.nav-links a {
  color: var(--on-dark);
  font-size: 12px;
  line-height: 1;
  letter-spacing: -0.12px;
}

.nav-links a:hover {
  color: var(--blue-dark);
  text-decoration: none;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.lang-switch {
  color: var(--on-dark);
  font-size: 12px;
  letter-spacing: -0.12px;
}

.lang-switch:hover {
  color: var(--blue-dark);
  text-decoration: none;
}

.btn--nav {
  min-height: 30px;
  padding: 6px 16px;
  font-size: 12px;
  letter-spacing: -0.12px;
  background: var(--blue);
  color: #fff;
}

/* Mobile menu (CSS-only via <details>) */
.nav-menu {
  display: none;
  position: relative;
  margin-left: auto;
}

.nav-menu > summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: #fff;
}

.nav-menu > summary::-webkit-details-marker {
  display: none;
}

.nav-dropdown {
  position: absolute;
  right: -20px;
  top: 44px;
  background: var(--black);
  min-width: 240px;
  padding: 12px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.nav-dropdown a {
  color: var(--on-dark);
  font-size: 14px;
  padding: 10px 0;
  min-height: 44px;
  display: flex;
  align-items: center;
}

.nav-dropdown a:hover {
  color: var(--blue-dark);
  text-decoration: none;
}

/* ---------- Tiles (full-bleed, color change = divider) ---------- */
.tile {
  padding: var(--section-pad) 0;
  border-radius: 0;
}

.tile--light {
  background: var(--canvas);
  color: var(--ink);
}

.tile--parchment {
  background: var(--parchment);
  color: var(--ink);
}

.tile--dark {
  background: var(--tile-1);
  color: var(--on-dark);
}

.tile--dark a:not(.btn) {
  color: var(--blue-dark);
}

.tile--light a:not(.btn),
.tile--parchment a:not(.btn) {
  color: var(--blue);
}

.tile .container > * + * {
  margin-top: 24px;
}

.tile-head {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.tile-head .lead {
  margin-top: 20px;
  color: var(--ink-80);
}

.tile--dark .tile-head .lead {
  color: var(--muted-dark);
}

/* Split layout: text + product image */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split > .split-text > * + * {
  margin-top: 20px;
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  font-size: 17px;
  line-height: 1.47;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 14px;
  height: 8px;
  border-left: 2.5px solid var(--blue);
  border-bottom: 2.5px solid var(--blue);
  transform: rotate(-45deg);
}

.tile--dark .check-list li::before {
  border-color: var(--blue-dark);
}

/* ---------- Product imagery (the system's only shadow) ---------- */
.shot {
  margin: 0;
  position: relative;
}

.shot img {
  width: 100%;
  height: auto;
  box-shadow: var(--product-shadow);
  border-radius: var(--r-sm);
}

.shot--hero img {
  border-radius: 0; /* hero imagery is full-bleed rectangular */
}

.shot.is-placeholder {
  aspect-ratio: 16 / 10;
  background: var(--parchment);
  border: 1px dashed #b9b9c0;
  border-radius: var(--r-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--product-shadow);
}

.tile--dark .shot.is-placeholder {
  background: var(--tile-3);
  border-color: #4a4a52;
}

.shot.is-placeholder::before {
  content: attr(data-file);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
}

.tile--dark .shot.is-placeholder::before {
  color: var(--muted-dark);
}

.shot.is-placeholder::after {
  content: attr(data-desc);
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-muted);
  max-width: 46ch;
}

.tile--dark .shot.is-placeholder::after {
  color: var(--muted-dark);
}

.shot.is-placeholder img {
  display: none;
}

.shot-caption {
  margin-top: 14px;
  text-align: center;
}

/* ---------- Hero ---------- */
.hero {
  padding-top: 72px;
  text-align: center;
}

.hero .lead {
  max-width: 780px;
  margin: 24px auto 0;
  color: var(--ink-80);
}

.hero .cta-row {
  margin-top: 36px;
}

.hero-note {
  margin-top: 22px;
  font-size: 14px;
  letter-spacing: -0.224px;
  color: var(--ink-muted);
}

.hero-shot {
  margin-top: 56px;
}

/* ---------- Code block ---------- */
.code-wrap {
  position: relative;
  background: var(--black);
  border-radius: var(--r-md);
  overflow: hidden;
  text-align: left;
  box-shadow: var(--product-shadow);
}

pre.code {
  margin: 0;
  padding: 24px 26px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.65;
  color: #c9d1d9;
  background: transparent;
  border: 0;
}

.code .c-tag {
  color: #7ee787;
}

.code .c-attr {
  color: var(--blue-dark);
}

.code .c-str {
  color: #a5d6ff;
}

.code .c-com {
  color: #8b949e;
}

.code .c-fn {
  color: #d2a8ff;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: 0;
  border-radius: var(--r-pill);
  font-family: var(--font-text);
  font-size: 12px;
  letter-spacing: -0.12px;
  padding: 7px 14px;
  cursor: pointer;
  min-height: 30px;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.copy-btn:active {
  transform: scale(0.95);
}

/* ---------- Feature cards (store-utility-card) ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 24px;
}

.card-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  color: var(--ink);
}

.card-icon svg {
  width: 28px;
  height: 28px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.card h3 {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.24;
  letter-spacing: -0.374px;
  margin-bottom: 8px;
}

.card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.43;
  letter-spacing: -0.224px;
  color: var(--ink-80);
}

.card .req-tag {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0;
  color: var(--ink-muted);
  background: var(--parchment);
  border: 1px solid var(--divider);
  border-radius: 5px;
  padding: 2px 7px;
}

/* ---------- Roadmap section ---------- */
.phase-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px 32px;
  max-width: 820px;
  margin-inline: auto;
  text-align: left;
}

.phase-list li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 17px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.phase-list .num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--blue-dark);
  min-width: 26px;
}

/* ---------- Final CTA ---------- */
.final-logo {
  width: 84px;
  height: 84px;
  margin: 0 auto 8px;
}

/* ---------- Footer (parchment, dense links, fine print) ---------- */
.footer {
  background: var(--parchment);
  color: var(--ink-80);
  padding: 64px 0;
}

.footer-cols {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer h4 {
  font-family: var(--font-text);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.29;
  letter-spacing: -0.224px;
  margin: 0 0 14px;
  color: var(--ink);
}

.footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer ul a {
  display: inline-block;
  color: var(--ink-80);
  font-size: 17px;
  line-height: 2.41; /* dense-link: relaxed leading is the brand */
}

.footer ul a:hover {
  color: var(--blue);
}

.footer-brand p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: -0.224px;
  color: var(--ink-80);
  max-width: 34ch;
}

.footer-brand img {
  width: 36px;
  height: 36px;
}

.footer-legal {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--divider);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
  justify-content: space-between;
}

.footer-legal p {
  margin: 0;
  font-size: 12px;
  line-height: 1.35;
  letter-spacing: -0.12px;
  color: var(--ink-muted);
}

.footer-legal a {
  color: var(--ink-muted);
  font-size: 12px;
}

.footer-legal a:hover {
  color: var(--blue);
}

/* ---------- Legal pages ---------- */
.legal-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

.legal-body h1 {
  font-size: 40px;
  line-height: 1.1;
  margin-bottom: 8px;
}

.legal-body .updated {
  font-size: 14px;
  color: var(--ink-muted);
  letter-spacing: -0.224px;
  margin-bottom: 40px;
}

.legal-body h2 {
  font-family: var(--font-display);
  font-size: 21px;
  line-height: 1.19;
  letter-spacing: 0.231px;
  margin: 44px 0 14px;
}

.legal-body h3 {
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 600;
  margin: 26px 0 8px;
}

.legal-body p,
.legal-body li {
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.374px;
}

.legal-body p {
  margin: 0 0 16px;
}

.legal-body ul {
  margin: 0 0 16px;
  padding-left: 22px;
}

.legal-body li {
  margin-bottom: 8px;
}

.legal-body dl {
  margin: 0 0 16px;
}

.legal-body dt {
  font-weight: 600;
  margin-top: 12px;
}

.legal-body dd {
  margin: 2px 0 0;
}

.legal-body .callout {
  background: var(--parchment);
  border-radius: var(--r-md);
  padding: 18px 22px;
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.5;
}

.legal-body a {
  word-break: break-word;
}

/* ---------- 404 ---------- */
.nf {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--parchment);
  padding: 60px 24px;
}

.nf .cta-row {
  margin-top: 32px;
}

/* ---------- Motion (reveal on scroll; respects reduced motion) ---------- */
.js .reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.js .hero .rise {
  animation: rise 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.js .hero .rise-1 { animation-delay: 0.05s; }
.js .hero .rise-2 { animation-delay: 0.15s; }
.js .hero .rise-3 { animation-delay: 0.25s; }
.js .hero .rise-4 { animation-delay: 0.35s; }
.js .hero .rise-5 { animation-delay: 0.5s; }

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .js .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .js .hero .rise {
    animation: none;
  }
  .btn:active {
    transform: none;
  }
}

/* ---------- Responsive (DESIGN.md breakpoints) ---------- */
@media (max-width: 1068px) {
  h1 {
    font-size: 40px;
  }
  h2 {
    font-size: 34px;
  }
  .lead {
    font-size: 24px;
  }
}

@media (max-width: 833px) {
  :root {
    --section-pad: 56px;
  }
  .nav-links {
    display: none;
  }
  .nav-right .btn--nav {
    display: none;
  }
  .nav-menu {
    display: block;
  }
  .split {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-cols {
    grid-template-columns: 1fr 1fr;
  }
  .phase-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  h1 {
    font-size: 34px;
  }
  h2 {
    font-size: 28px;
  }
  .lead {
    font-size: 21px;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
  .cta-row .btn {
    width: 100%;
  }
}

@media (max-width: 419px) {
  h1 {
    font-size: 28px;
  }
  .footer-cols {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .hero {
    padding-top: 48px;
  }
}