/* Kestrel website. Colours, type and keycaps follow the app (kestrel/src/renderer/src/styles.css). */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f7f9;
  --bg-elevated: #ffffff;
  --bg-accent: #efedfb;
  --text: #1d1d22;
  --text-muted: #6b6b76;
  --text-faint: #a9a9b3;
  --border: #e8e8ee;
  --accent: #6e56cf;
  --accent-hover: #5d46bd;
  --accent-text: #5b44c2;
  --accent-contrast: #ffffff;
  --kbd-bg: #f1f1f5;
  --kbd-border: #dcdce4;
  --shadow-lg: 0 30px 80px rgba(20, 16, 50, 0.18), 0 6px 20px rgba(20, 16, 50, 0.08);
  --shadow-sm: 0 1px 2px rgba(20, 16, 50, 0.06), 0 4px 14px rgba(20, 16, 50, 0.05);
  --radius: 14px;
  --wrap: 1120px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI Variable Text', 'Segoe UI', system-ui, 'Inter', 'Helvetica Neue', sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1d1e22;
    --bg-soft: #232429;
    --bg-elevated: #2a2b31;
    --bg-accent: #2f2c42;
    --text: #e8e8ed;
    --text-muted: #a3a3ae;
    --text-faint: #767682;
    --border: #34353c;
    --accent: #8f7cf0;
    --accent-hover: #a293f4;
    --accent-text: #b2a6f6;
    --accent-contrast: #ffffff;
    --kbd-bg: #33343b;
    --kbd-border: #46474f;
    --shadow-lg: 0 30px 80px rgba(0, 0, 0, 0.5), 0 6px 20px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 4px 14px rgba(0, 0, 0, 0.2);
    color-scheme: dark;
  }
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--accent-text);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}

p {
  margin: 0;
}

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

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 16px;
  top: 12px;
  z-index: 10;
  padding: 8px 12px;
  background: var(--bg-elevated);
  border-radius: 8px;
}

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

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.6) blur(14px);
  -webkit-backdrop-filter: saturate(1.6) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
}
.site-header .wrap {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-weight: 650;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.brand img {
  width: 30px;
  height: 30px;
}
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--bg-accent);
  color: var(--accent-text);
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}
.site-nav a:not(.btn) {
  color: var(--text-muted);
  text-decoration: none;
}
.site-nav a:not(.btn):hover {
  color: var(--text);
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.btn:hover {
  border-color: var(--text-faint);
}
.btn:active {
  transform: translateY(1px);
}
.btn-primary {
  background: var(--accent);
  border-color: transparent;
  color: var(--accent-contrast);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: transparent;
}
.btn-small {
  min-height: 36px;
  padding: 0 14px;
  font-size: 14px;
}
.btn[aria-disabled='true'] {
  opacity: 0.55;
  pointer-events: none;
}

/* ---------- keycaps (as in the app) ---------- */

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.6em;
  height: 1.6em;
  padding: 0 0.4em;
  border-radius: 6px;
  border: 1px solid var(--kbd-border);
  border-bottom-width: 2px;
  background: var(--kbd-bg);
  color: var(--text);
  font: 600 0.82em/1 var(--font);
  vertical-align: 0.08em;
}

/* ---------- hero ---------- */

.hero {
  padding: 72px 0 0;
  text-align: center;
  overflow: hidden;
}
.hero-icon {
  display: block;
  width: 76px;
  height: 76px;
  margin: 0 auto 22px;
  border-radius: 22.5%;
  box-shadow: 0 10px 30px rgba(58, 42, 168, 0.32), 0 2px 6px rgba(20, 16, 50, 0.12);
}
.hero .eyebrow {
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(40px, 6.4vw, 72px);
  font-weight: 750;
  letter-spacing: -0.035em;
  max-width: 14ch;
  margin: 0 auto;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent-text);
}
.hero .lede {
  max-width: 600px;
  margin: 22px auto 0;
  font-size: clamp(17px, 2vw, 20px);
  color: var(--text-muted);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 32px;
}
.hero-note {
  margin-top: 14px;
  font-size: 14px;
  color: var(--text-faint);
}

.screen {
  position: relative;
  margin: 56px auto 0;
  max-width: 1080px;
  border-radius: 14px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background: var(--bg-soft);
}
.screen::before {
  /* Window chrome: a slim bar with the three dots, so the screenshot reads as an app window. */
  content: '';
  display: block;
  height: 30px;
  background:
    radial-gradient(circle at 18px 15px, #ff5f57 5px, transparent 5.5px),
    radial-gradient(circle at 36px 15px, #febc2e 5px, transparent 5.5px),
    radial-gradient(circle at 54px 15px, #28c840 5px, transparent 5.5px),
    var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.hero .screen {
  margin-bottom: -1px;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  border-bottom: 0;
}
.hero-fade {
  height: 1px;
  background: var(--border);
}

/* ---------- keys strip ---------- */

.keys-strip {
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.keys-strip ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 34px;
  color: var(--text-muted);
  font-size: 15px;
}
.keys-strip li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.keys-strip kbd {
  font-size: 14px;
}

/* ---------- sections ---------- */

section {
  scroll-margin-top: 72px;
}
.section {
  padding: 96px 0;
}
.section-flush {
  padding-top: 0;
}
.section-head {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-head h2 {
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 720;
}
.section-head p {
  margin-top: 14px;
  font-size: 18px;
  color: var(--text-muted);
}
.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--accent-text);
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature {
  padding: 26px 26px 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}
.feature-keys {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
}
.feature-keys kbd {
  font-size: 15px;
}
.feature h3 {
  font-size: 18px;
  font-weight: 650;
  margin-bottom: 8px;
}
.feature p {
  color: var(--text-muted);
  font-size: 15px;
}

.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 56px;
  align-items: center;
}
.split + .split {
  margin-top: 96px;
}
.split.reverse {
  grid-template-columns: 7fr 5fr;
}
.split.reverse .split-copy {
  order: 2;
}
.split-copy h2 {
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 720;
}
.split-copy p {
  margin-top: 16px;
  font-size: 17px;
  color: var(--text-muted);
}
.split-copy ul {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 15px;
}
.split-copy li {
  position: relative;
  padding-left: 18px;
}
.split-copy li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}
.split .screen {
  margin: 0;
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 28px;
}
.platform-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-elevated);
  font-size: 14px;
  color: var(--text-muted);
}
.platform-pill svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.cta {
  margin: 0 auto;
  max-width: 820px;
  padding: 56px 32px;
  border-radius: 20px;
  background: var(--bg-accent);
  text-align: center;
}
.cta h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 720;
}
.cta p {
  margin: 14px auto 0;
  max-width: 520px;
  color: var(--text-muted);
  font-size: 17px;
}
.cta .hero-actions {
  margin-top: 26px;
}

/* ---------- 404 ---------- */

.notfound {
  min-height: 80vh;
  display: grid;
  place-content: center;
  gap: 16px;
  text-align: center;
}
/* The inbox-zero kestrel from the app: a silhouette with beating wings. */
.flyer {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  color: var(--accent);
  animation: windhover 3.6s ease-in-out infinite;
}
.flyer .wing-near,
.flyer .wing-far {
  transform-box: view-box;
  animation: 0.9s ease-in-out infinite;
}
.flyer .wing-near {
  transform-origin: 57px 53px;
  animation-name: flap-near;
}
.flyer .wing-far {
  transform-origin: 60px 59.5px;
  animation-name: flap-far;
  opacity: 0.55;
}
@keyframes windhover {
  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
  50% {
    transform: translate(2px, -6px) rotate(-2deg);
  }
}
@keyframes flap-near {
  0%,
  100% {
    transform: scaleY(1);
  }
  50% {
    transform: scaleY(-0.8);
  }
}
@keyframes flap-far {
  0%,
  100% {
    transform: scaleY(-0.6);
  }
  50% {
    transform: scaleY(1);
  }
}
.notfound h1 {
  font-size: 32px;
}
.notfound p {
  color: var(--text-muted);
}

/* ---------- footer ---------- */

.site-footer {
  padding: 40px 0 48px;
  border-top: 1px solid var(--border);
  color: var(--text-faint);
  font-size: 14px;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}
.site-footer a {
  color: var(--text-muted);
}

/* ---------- download page ---------- */

.page-head {
  padding: 64px 0 40px;
}
.page-head h1 {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 750;
  letter-spacing: -0.03em;
}
.page-head .lede {
  margin-top: 14px;
  max-width: 640px;
  font-size: 18px;
  color: var(--text-muted);
}
.release-meta {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 14px;
  color: var(--text-faint);
}

.downloads {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.download-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
}
.download-card.recommended {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-sm);
}
.download-card .recommend-tag {
  display: none;
  position: absolute;
  top: -11px;
  left: 20px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-contrast);
  font-size: 12px;
  font-weight: 650;
}
.download-card.recommended .recommend-tag {
  display: inline-block;
}
.download-card .os-icon {
  width: 30px;
  height: 30px;
  fill: var(--text);
  margin-bottom: 16px;
}
.download-card h2 {
  font-size: 20px;
  font-weight: 680;
}
.download-card .for {
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 15px;
}
.download-card .file {
  margin-top: 14px;
  color: var(--text-faint);
  font-size: 13px;
  word-break: break-all;
}
.download-card .btn {
  margin-top: auto;
}
.download-card .file + .btn,
.download-card .for + .btn {
  margin-top: 20px;
}
.downloads-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-muted);
}

.guide {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 56px;
  padding: 72px 0 24px;
}
.guide-nav {
  position: sticky;
  top: 88px;
  align-self: start;
  display: grid;
  gap: 2px;
  font-size: 14px;
}
.guide-nav a {
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--text-muted);
  text-decoration: none;
}
.guide-nav a:hover {
  background: var(--bg-soft);
  color: var(--text);
}
.guide-body > section + section {
  margin-top: 56px;
  padding-top: 56px;
  border-top: 1px solid var(--border);
}
.guide-body h2 {
  font-size: 26px;
  font-weight: 700;
}
.guide-body h3 {
  font-size: 17px;
  font-weight: 650;
  margin: 28px 0 10px;
}
.guide-body p,
.guide-body li {
  color: var(--text-muted);
}
.guide-body p {
  margin-top: 12px;
}
.guide-body strong {
  color: var(--text);
  font-weight: 600;
}
.guide-body ol,
.guide-body ul {
  margin: 12px 0 0;
  padding-left: 22px;
}
.guide-body li + li {
  margin-top: 8px;
}

.tabs {
  display: inline-flex;
  gap: 2px;
  margin-top: 20px;
  padding: 3px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.tabs button {
  padding: 6px 16px;
  border: 0;
  border-radius: 8px;
  background: none;
  color: var(--text-muted);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.tabs button[aria-selected='true'] {
  background: var(--bg-elevated);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.tab-panel[hidden] {
  display: none;
}

.callout {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  font-size: 15px;
  color: var(--text-muted);
}
.callout strong {
  color: var(--text);
}

code {
  font: 0.9em ui-monospace, Menlo, 'Cascadia Mono', Consolas, monospace;
  padding: 1px 5px;
  border-radius: 5px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  word-break: break-word;
}

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .features,
  .downloads {
    grid-template-columns: 1fr 1fr;
  }
  .split,
  .split.reverse {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .split.reverse .split-copy {
    order: 0;
  }
  .guide {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .guide-nav {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
  }
  .guide-nav a {
    border: 1px solid var(--border);
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 16px;
  }
  .site-nav .hide-sm {
    display: none;
  }
  .hero {
    padding-top: 48px;
  }
  .screen {
    margin-top: 40px;
    border-radius: 10px;
  }
  .screen::before {
    height: 22px;
    background:
      radial-gradient(circle at 14px 11px, #ff5f57 3.5px, transparent 4px),
      radial-gradient(circle at 27px 11px, #febc2e 3.5px, transparent 4px),
      radial-gradient(circle at 40px 11px, #28c840 3.5px, transparent 4px),
      var(--bg-soft);
  }
  .features,
  .downloads {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 64px 0;
  }
  .section-flush {
    padding-top: 0;
  }
  .cta {
    padding: 40px 20px;
  }
  .keys-strip ul {
    gap: 12px 20px;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition: none !important;
  }
  .flyer,
  .flyer .wing-near,
  .flyer .wing-far {
    animation: none;
  }
}