/*
 * flintnotes.app (WEB-01, D-162): the app's own tokens (tokens.css, copied from docs/design), its
 * fonts, its grayscale. Structure after NestJS's site (a big hero, screens as the centrepiece, a
 * feature grid); never its brand. Motion is small, never in the way, and off under reduce-motion.
 */

@font-face {
  font-family: 'Onest';
  src: url('fonts/Onest-Variable.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}

@font-face {
  font-family: 'Geist Mono';
  src: url('fonts/GeistMono-Variable.woff2') format('woff2');
  font-weight: 100 900;
  font-display: swap;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--fl-ground-window);
}

body {
  margin: 0;
  font-family: var(--fl-font-ui);
  font-size: 16px;
  line-height: 1.6;
  color: var(--fl-text-body);
  background: var(--fl-ground-window);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

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

kbd {
  display: inline-block;
  min-width: 22px;
  margin: 0 2px;
  padding: 1px 6px;
  border-radius: 6px;
  background: var(--fl-ground-tile);
  box-shadow: inset 0 0 0 1px var(--fl-edge-chip);
  font-family: var(--fl-font-mono);
  font-size: 0.78em;
  color: var(--fl-text-primary);
  text-align: center;
  vertical-align: 0.08em;
}

code {
  font-family: var(--fl-font-mono);
  font-size: 0.88em;
  color: var(--fl-text-primary);
}

svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* The bar at the top. */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 32px;
  background: color-mix(in srgb, var(--fl-ground-window) 92%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  color: var(--fl-text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14.5px;
}

.nav-links a:not(.button) {
  text-decoration: none;
  color: var(--fl-text-secondary);
  transition: color var(--fl-dur-fast, 120ms) ease;
}

.nav-links a:not(.button):hover {
  color: var(--fl-text-highlight);
}

/* Buttons, as the app's. */
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  padding: 0 20px;
  border-radius: var(--fl-radius-button);
  background: var(--fl-ground-tile);
  box-shadow: inset 0 0 0 1px var(--fl-edge-chip);
  color: var(--fl-text-primary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition:
    transform 160ms cubic-bezier(0.2, 0.9, 0.3, 1.2),
    background-color 120ms ease,
    box-shadow 120ms ease;
}

.button:hover {
  background: var(--fl-ground-float);
  box-shadow: inset 0 0 0 1px var(--fl-edge-float);
}

.button:active {
  transform: scale(0.97);
}

.button.primary {
  background: var(--fl-strong-bg);
  color: var(--fl-strong-fg);
  box-shadow: var(--fl-shadow-primary-button);
}

.button.primary:hover {
  background: var(--fl-text-highlight);
}

.button.small {
  height: 36px;
  padding: 0 14px;
  font-size: 14px;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: var(--fl-size-label);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fl-text-faint);
}

.soft {
  color: var(--fl-text-heading-soft);
}

.fine {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--fl-text-muted);
}

/* The hero: the headline, and the capture popup typing beside it. */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: center;
  gap: 56px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 96px 32px 72px;
}

.hero-grid {
  position: absolute;
  inset: -60px 0 0;
  z-index: -1;
  background-image:
    linear-gradient(var(--fl-edge-divider) 1px, transparent 1px),
    linear-gradient(90deg, var(--fl-edge-divider) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 40%, black 10%, transparent 70%);
}

h1 {
  margin: 0;
  font-size: clamp(44px, 6.4vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--fl-text-highlight);
}

h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-weight: 700;
  color: var(--fl-text-highlight);
}

h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--fl-text-highlight);
}

.lede {
  max-width: 540px;
  margin: 26px 0 32px;
  font-size: 19px;
  line-height: 1.6;
  color: var(--fl-text-secondary);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.capture-demo {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 16px;
}

.capture-card {
  padding: 16px 16px 12px;
  border-radius: var(--fl-radius-popup);
  background: var(--fl-ground-float);
  box-shadow: var(--fl-shadow-float);
  transition:
    transform 260ms cubic-bezier(0.2, 0.9, 0.3, 1),
    opacity 260ms ease;
}

.capture-card.sent {
  transform: translateY(-10px) scale(0.98);
  opacity: 0;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  min-height: 30px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 10px;
  border-radius: var(--fl-radius-check);
  background: var(--fl-ground-tile);
  box-shadow: inset 0 0 0 1px var(--fl-edge-chip);
  font-family: var(--fl-font-mono);
  font-size: var(--fl-size-meta);
  color: var(--fl-text-primary);
  animation: chip-in 260ms cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.chip .stripe {
  width: 4px;
  height: 13px;
  border-radius: 2px;
  background: var(--fl-pri-high-color);
}

.chip svg {
  width: 13px;
  height: 13px;
}

@keyframes chip-in {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.9);
  }
}

.capture-input {
  min-height: 44px;
  margin: 14px 4px 10px;
  font-size: var(--fl-size-capture);
  color: var(--fl-text-highlight);
  white-space: nowrap;
  overflow: hidden;
}

.caret {
  display: inline-block;
  width: 2px;
  height: 22px;
  margin-left: 1px;
  vertical-align: -4px;
  background: var(--fl-accent);
  animation: blink 1.05s steps(1) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.capture-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tools {
  display: flex;
  gap: 16px;
  padding-left: 4px;
  color: var(--fl-text-muted);
}

.target {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--fl-text-secondary);
}

.send {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--fl-strong-bg);
  color: var(--fl-strong-fg);
  box-shadow: var(--fl-shadow-primary-button);
  transition: transform 140ms ease;
}

.send.pressed {
  transform: scale(0.88);
}

.saved {
  align-self: center;
  padding: 10px 16px;
  border-radius: 14px;
  background: var(--fl-ground-float);
  box-shadow: var(--fl-shadow-float);
  font-size: 14px;
  color: var(--fl-text-primary);
  opacity: 0;
  transform: translateY(6px);
  transition:
    opacity 260ms ease,
    transform 260ms ease;
}

.saved.on {
  opacity: 1;
  transform: none;
}

.demo-hint {
  margin: 0;
  text-align: center;
  font-size: 13px;
  color: var(--fl-text-muted);
}

/* The screens: the app's window, its tabs above. */
.showcase {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 32px 96px;
}

.tabs {
  display: flex;
  justify-content: center;
  gap: 4px;
  width: max-content;
  margin: 0 auto 28px;
  padding: 4px;
  border-radius: 12px;
  background: var(--fl-ground-card);
  box-shadow: inset 0 0 0 1px var(--fl-edge-card);
}

.tabs button {
  height: 36px;
  padding: 0 16px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--fl-text-muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.tabs button[aria-selected='true'] {
  background: var(--fl-strong-bg);
  color: var(--fl-strong-fg);
  font-weight: 500;
}

.window {
  margin: 0;
  overflow: hidden;
  border-radius: var(--fl-radius-card);
  background: var(--fl-ground-sidebar);
  box-shadow: var(--fl-shadow-float);
}

.window-bar {
  display: flex;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--fl-edge-divider);
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: var(--fl-radius-pill);
  background: var(--fl-ground-tile);
}

.window img {
  width: 100%;
  transition: opacity 220ms ease;
}

.window img.swapping {
  opacity: 0;
}

.caption {
  margin: 18px auto 0;
  max-width: 640px;
  text-align: center;
  font-size: 15px;
  color: var(--fl-text-muted);
}

/* Features. */
.features {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 32px 96px;
}

.section-head {
  margin-bottom: 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  padding: 26px;
  border-radius: var(--fl-radius-card);
  background: var(--fl-ground-card);
  box-shadow: var(--fl-shadow-card);
  transition:
    transform 220ms cubic-bezier(0.2, 0.9, 0.3, 1),
    box-shadow 220ms ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--fl-shadow-card-hover);
}

.card p {
  margin: 0;
  font-size: 15px;
  color: var(--fl-text-secondary);
}

.card.wide {
  grid-column: span 2;
}

.card.mini-card {
  grid-column: span 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.card.mini-card img {
  flex: 0 1 300px;
  min-width: 0;
  margin: -16px -12px -22px 0;
}

.tile {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  border-radius: 10px;
  background: var(--fl-ground-tile);
  box-shadow: inset 0 0 0 1px var(--fl-edge-chip);
  color: var(--fl-text-heading-soft);
}

.tile svg {
  width: 18px;
  height: 18px;
}

/* Private: the promise beside a list file as it is on disk. */
.private {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  align-items: center;
  gap: 56px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 32px 96px;
}

.private-text p:not(.eyebrow) {
  margin: 22px 0 24px;
  font-size: 17px;
  color: var(--fl-text-secondary);
}

.link {
  color: var(--fl-text-primary);
  text-underline-offset: 4px;
}

.link:hover {
  color: var(--fl-text-highlight);
}

.file {
  margin: 0;
  padding: 26px 28px;
  overflow-x: auto;
  border-radius: var(--fl-radius-card);
  background: var(--fl-ground-well);
  box-shadow: inset 0 0 0 1px var(--fl-edge-card);
  font-family: var(--fl-font-mono);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--fl-code-plain);
}

.file code {
  font-size: inherit;
  color: inherit;
}

.file .dim {
  color: var(--fl-text-faint);
}

.file .field {
  color: var(--fl-accent);
}

/* The last call. */
.cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 32px 112px;
  text-align: center;
}

.cta p {
  margin: 0 0 10px;
  font-size: 17px;
  color: var(--fl-text-secondary);
}

.cta .fine {
  max-width: 460px;
  margin-top: 8px;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 32px 40px;
  border-top: 1px solid var(--fl-edge-divider);
  font-size: 13.5px;
  color: var(--fl-text-muted);
}

.footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
}

.footer a {
  text-decoration: none;
}

.footer a:hover {
  color: var(--fl-text-highlight);
}

/* Things rise in a little as they come into view (the script marks them). */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 600ms ease,
    transform 600ms cubic-bezier(0.2, 0.9, 0.3, 1);
}

.reveal.seen {
  opacity: 1;
  transform: none;
}

/* The privacy page: a readable column. */
.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 32px 96px;
}

.doc h1 {
  font-size: clamp(38px, 5vw, 52px);
}

.doc .updated {
  margin: 16px 0 40px;
  font-family: var(--fl-font-mono);
  font-size: 13px;
  color: var(--fl-text-muted);
}

.doc h2 {
  margin: 48px 0 12px;
  font-size: 24px;
  letter-spacing: -0.02em;
}

.doc p,
.doc li {
  font-size: 16px;
  color: var(--fl-text-secondary);
}

.doc li {
  margin: 6px 0;
}

.doc strong {
  color: var(--fl-text-primary);
}

.doc .summary {
  padding: 22px 26px;
  border-radius: var(--fl-radius-card);
  background: var(--fl-ground-card);
  box-shadow: var(--fl-shadow-card);
}

.doc .summary p {
  margin: 0;
  color: var(--fl-text-primary);
}

@media (max-width: 900px) {
  .hero,
  .private {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .hero {
    padding-top: 56px;
  }

  .grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .card.wide,
  .card.mini-card {
    grid-column: auto;
  }

  .card.mini-card {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-links a:not(.button) {
    display: none;
  }

  .tabs {
    width: auto;
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}