:root {
  color-scheme: light dark;
  --page: #f1f4f0;
  --surface: #e7ebe6;
  --surface-strong: #d9dfd8;
  --ink: #161a17;
  --muted: #566058;
  --line: rgba(22, 26, 23, 0.15);
  --accent: #066d3c;
  --accent-ink: #e8fff3;
  --header: rgba(241, 244, 240, 0.82);
  --radius: 16px;
  --max: 1320px;
  font-family: "Avenir Next", Avenir, "Segoe UI", "Noto Sans TC", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

picture {
  display: block;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: var(--ink);
  color: var(--page);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
footer,
.hero,
.manifesto,
.principles,
.reliability,
.status-section {
  width: min(calc(100% - 3rem), var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.brand-mark {
  width: 28px;
  height: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  align-items: end;
  gap: 3px;
}

.brand-mark i {
  display: block;
  border-radius: 3px 3px 1px 1px;
  background: var(--accent);
}

.brand-mark i:first-child {
  height: 50%;
}

.brand-mark i:nth-child(2) {
  height: 100%;
}

.brand-mark i:last-child {
  height: 72%;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2.5rem);
  font-size: 0.88rem;
  color: var(--muted);
}

nav a {
  transition: color 180ms ease;
}

nav a:hover,
nav a:focus-visible {
  color: var(--accent);
}

.hero {
  min-height: calc(100dvh - 72px);
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
  align-items: center;
  gap: clamp(2.5rem, 7vw, 7rem);
  padding-block: 3rem;
}

.eyebrow {
  margin: 0 0 1.25rem;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 1.5rem;
  font-size: clamp(3.25rem, 5.1vw, 4.6rem);
  line-height: 0.96;
  letter-spacing: -0.065em;
  font-weight: 650;
}

.hero-lede {
  max-width: 20em;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.2rem);
  line-height: 1.7;
}

.hero-visual {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #151917;
  box-shadow: 0 30px 90px rgba(20, 32, 25, 0.18);
}

.hero-visual img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.hero-visual figcaption {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  padding: 1rem 1.25rem;
  color: #cbd4ce;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.hero-visual figcaption span:nth-child(2) {
  text-align: center;
}

.hero-visual figcaption span:last-child {
  text-align: right;
}

.manifesto {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 8vw;
  align-items: end;
  padding-block: clamp(6rem, 12vw, 11rem);
  border-top: 1px solid var(--line);
}

.manifesto h2,
.principles h2,
.reliability h2,
.status-section h2 {
  margin-bottom: 0;
  font-size: clamp(2.4rem, 5vw, 5.1rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
  font-weight: 620;
}

.manifesto p,
.reliability-copy > p,
.status-section p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.principles {
  padding-bottom: clamp(6rem, 12vw, 11rem);
}

.principles-heading {
  max-width: 880px;
  margin-bottom: 3rem;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  grid-template-rows: repeat(2, minmax(250px, auto));
  gap: 1rem;
}

.principle-grid article {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
}

.principle-primary {
  grid-row: 1 / 3;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  background: #111512;
  color: #edf3ee;
}

.principle-grid h3 {
  margin-bottom: 0.7rem;
  font-size: clamp(1.5rem, 2.8vw, 2.6rem);
  letter-spacing: -0.035em;
}

.principle-grid p {
  max-width: 30em;
  margin-bottom: 0;
  color: #aeb9b1;
  line-height: 1.65;
}

.route-demo {
  position: absolute;
  inset: 10% 8% auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  color: #d6ded8;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.route-line {
  height: 2px;
  overflow: hidden;
  background: rgba(232, 255, 243, 0.16);
}

.route-line i {
  display: block;
  width: 24%;
  height: 100%;
  background: var(--accent);
}

.principle-secondary {
  min-height: 270px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.privacy-panel {
  background: var(--accent);
  color: var(--accent-ink);
}

.privacy-panel p {
  color: rgba(232, 255, 243, 0.94);
}

.collision-panel {
  background: var(--surface-strong);
}

.collision-panel p {
  color: var(--muted);
}

.slug-lines {
  position: absolute;
  top: 1.4rem;
  right: 1.6rem;
  left: 1.6rem;
  display: grid;
  gap: 0.55rem;
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: 0.76rem;
}

.slug-lines span {
  width: fit-content;
  padding: 0.35rem 0.55rem;
  border-radius: 8px;
  background: var(--page);
  color: var(--muted);
}

.slug-lines span:nth-child(2) {
  margin-left: 18%;
  color: var(--accent);
}

.slug-lines span:nth-child(3) {
  margin-left: 38%;
}

.reliability {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: clamp(2.5rem, 8vw, 8rem);
  align-items: center;
  padding-block: clamp(6rem, 11vw, 10rem);
  border-top: 1px solid var(--line);
}

.reliability-media {
  overflow: hidden;
  border-radius: var(--radius);
  background: #151917;
}

.reliability-media img {
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.reliability-copy > p {
  max-width: 38em;
  margin-top: 1.75rem;
}

.reliability dl {
  margin: 3rem 0 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.reliability dl div {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.reliability dt {
  margin-bottom: 0.45rem;
  color: var(--muted);
  font-size: 0.76rem;
}

.reliability dd {
  margin: 0;
  font-weight: 700;
}

.status-section {
  margin-bottom: 1rem;
  min-height: 370px;
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  align-items: end;
  gap: 3rem;
  padding: clamp(2rem, 5vw, 4.5rem);
  border-radius: var(--radius);
  background: #111512;
  color: #edf3ee;
}

.status-section h2 {
  max-width: 790px;
}

.status-section p {
  max-width: 34em;
  margin-top: 1.2rem;
  color: #aeb9b1;
}

.service-status {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(237, 243, 238, 0.2);
  border-radius: 10px;
  color: #d7dfd9;
  font-size: 0.84rem;
}

.status-light {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #9ba29d;
}

.service-status[data-state="healthy"] .status-light {
  background: #23c979;
  box-shadow: 0 0 0 4px rgba(35, 201, 121, 0.12);
}

footer {
  min-height: 180px;
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  align-items: center;
  gap: 3rem;
  color: var(--muted);
  font-size: 0.8rem;
}

footer p {
  margin: 0;
}

.footer-brand {
  color: var(--ink);
}

.not-found-page {
  min-height: 100dvh;
}

.not-found {
  width: min(calc(100% - 3rem), var(--max));
  min-height: 100dvh;
  margin-inline: auto;
  display: grid;
  grid-template-rows: 100px 1fr;
  align-items: center;
}

.not-found > div {
  max-width: 720px;
  padding-bottom: 10vh;
}

.error-code {
  margin-bottom: 1rem;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.12em;
}

.not-found h1 {
  font-size: clamp(3rem, 8vw, 6rem);
}

.not-found p:not(.error-code) {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.7;
}

.text-link {
  display: inline-block;
  margin-top: 1.5rem;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #111512;
    --surface: #191f1b;
    --surface-strong: #202822;
    --ink: #edf3ee;
    --muted: #aeb9b1;
    --line: rgba(237, 243, 238, 0.14);
    --accent: #23b96f;
    --accent-ink: #07150e;
    --header: rgba(17, 21, 18, 0.84);
  }

  .hero-visual,
  .reliability-media {
    box-shadow: none;
  }

  .principle-primary,
  .status-section {
    background: #181d1a;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--page);
    backdrop-filter: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    animation: enter 800ms cubic-bezier(0.16, 1, 0.3, 1) both;
  }

  .reveal-delay {
    animation-delay: 100ms;
  }

  .route-line i {
    animation: route 2.8s cubic-bezier(0.16, 1, 0.3, 1) infinite;
  }

  @keyframes enter {
    from {
      opacity: 0;
      transform: translateY(20px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  @keyframes route {
    from {
      transform: translateX(-110%);
    }
    to {
      transform: translateX(430%);
    }
  }
}

@media (max-width: 900px) {
  .hero,
  .manifesto,
  .reliability,
  .status-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-block: 4.5rem 6rem;
  }

  .hero-copy {
    max-width: 650px;
  }

  .manifesto {
    align-items: start;
    gap: 2rem;
  }

  .principle-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .principle-primary {
    grid-row: auto;
    min-height: 480px;
  }

  .reliability-media {
    max-height: 620px;
  }

  .reliability-media img {
    aspect-ratio: 16 / 10;
  }

  .status-section {
    align-items: start;
  }

  .service-status {
    justify-self: start;
  }
}

@media (max-width: 640px) {
  .site-header,
  footer,
  .hero,
  .manifesto,
  .principles,
  .reliability,
  .status-section,
  .not-found {
    width: min(calc(100% - 2rem), var(--max));
  }

  .site-header {
    min-height: 64px;
  }

  nav {
    display: none;
  }

  h1 {
    font-size: clamp(3.05rem, 15vw, 4.8rem);
  }

  .hero {
    gap: 3rem;
  }

  .hero-visual figcaption {
    font-size: 0.6rem;
  }

  .manifesto h2,
  .principles h2,
  .reliability h2,
  .status-section h2 {
    font-size: clamp(2.25rem, 11vw, 3.5rem);
  }

  .principle-primary {
    min-height: 420px;
  }

  .principle-secondary {
    min-height: 250px;
  }

  .reliability dl {
    grid-template-columns: 1fr;
  }

  .status-section {
    min-height: 480px;
  }

  footer {
    grid-template-columns: 1fr;
    align-content: center;
    gap: 1rem;
  }
}

/* Homepage creation */
.shorten-form { margin-top: 2rem; }
.shorten-form label { display: block; font-weight: 600; margin-bottom: .65rem; }
.shorten-input-row { display: flex; gap: .6rem; }
.shorten-input-row input { min-width: 0; flex: 1; width: 100%; padding: 1rem; border: 1px solid var(--line); border-radius: 10px; font: inherit; font-size: 16px; background: var(--page); color: var(--ink); }
.shorten-input-row button, .result-actions button, .result-actions a { border: 0; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer; padding: .9rem 1.1rem; background: var(--accent); color: var(--accent-ink); white-space: nowrap; }
.shorten-input-row button:hover, .result-actions button:hover, .result-actions a:hover { filter: brightness(.92); }
.shorten-input-row button:disabled { opacity: .6; cursor: wait; }
.shorten-form :focus-visible, .shorten-result :focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
#shorten-status { color: var(--muted); font-size: .9rem; line-height: 1.6; min-height: 1.6em; margin: .75rem 0 0; }
.shorten-result { display: flex; gap: 1.25rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); margin-top: 1.25rem; align-items: start; }
.shorten-result[hidden] { display: none; }
.result-copy { min-width: 0; flex: 1; }
.shorten-result .eyebrow { font-size: .75rem; margin: 0 0 .6rem; }
#short-link { font-size: clamp(1.15rem, 2vw, 1.6rem); font-weight: 700; overflow-wrap: anywhere; text-decoration: underline; text-underline-offset: .2em; }
#original-link { overflow-wrap: anywhere; color: var(--muted); font-size: .85rem; max-height: 4.5em; overflow: auto; line-height: 1.5; }
.result-actions { display: flex; gap: .5rem; flex-wrap: wrap; }
.result-actions button, .result-actions a { font-size: .85rem; padding: .75rem; }
.result-actions a { background: var(--page); color: var(--ink); border: 1px solid var(--line); }
.result-note { font-size: .8rem; line-height: 1.6; color: var(--muted); margin-bottom: 0; }
#qr-code { width: 144px; height: 144px; flex-shrink: 0; border-radius: 8px; background: white; }
@media (max-width: 600px) {
  .shorten-input-row { flex-direction: column; }
  .shorten-result { flex-direction: column; }
  #qr-code { width: 176px; height: 176px; align-self: center; }
}