:root {
  color-scheme: light;
  --bg: #f3f5f7;
  --surface: #ffffff;
  --surface-soft: #f7f9fb;
  --text: #111827;
  --muted: #667085;
  --muted-strong: #475467;
  --line: rgba(17, 24, 39, 0.1);
  --line-strong: rgba(17, 24, 39, 0.18);
  --accent: #0f766e;
  --accent-soft: #e7f5f1;
  --accent-warm: #b7791f;
  --ok: #087443;
  --error: #b42318;
  --work: #2652a4;
  --shadow: 0 26px 70px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: Inter, "PingFang HK", "Noto Sans TC", "Microsoft JhengHei", Arial, sans-serif;
  color: var(--text);
  background:
    linear-gradient(rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 72%, #edf1f3 100%);
  background-size: 48px 48px, 48px 48px, auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.18) 42%, rgba(243, 245, 247, 0.82));
}

.page {
  position: relative;
  width: min(1120px, calc(100vw - 48px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto auto;
  align-content: start;
  gap: clamp(72px, 14vh, 150px);
  padding: 28px 0 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  width: fit-content;
  height: 38px;
  color: var(--text);
  animation: enterSoft 420ms ease both;
}

.brand-mark {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  overflow: hidden;
  border-radius: 8px;
  color: #fff;
  background: #111827;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.18);
  font-size: 13px;
  font-weight: 820;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 18%, rgba(255, 255, 255, 0.28) 46%, transparent 68%);
  transform: translateX(-120%);
  animation: markSheen 5.6s ease-in-out infinite;
}

.brand-title {
  font-size: 14px;
  font-weight: 780;
  letter-spacing: 0;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 24px;
  margin-left: 6px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted-strong);
  background: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  font-weight: 720;
}

.status-pill::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.status-pill[data-kind="ok"] {
  color: var(--ok);
}

.status-pill[data-kind="bad"] {
  color: var(--error);
}

.tool {
  position: relative;
  overflow: hidden;
  min-height: 360px;
  display: grid;
  grid-template-columns: minmax(270px, 0.78fr) minmax(420px, 1fr);
  gap: 56px;
  align-items: center;
  padding: 44px 48px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.92));
  box-shadow: var(--shadow);
  animation: enterTool 540ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.tool::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0%, rgba(15, 118, 110, 0.08) 58%, transparent 100%),
    linear-gradient(rgba(15, 118, 110, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 118, 110, 0.06) 1px, transparent 1px);
  background-size: auto, 34px 34px, 34px 34px;
  mask-image: linear-gradient(90deg, transparent, #000 42%, #000 76%, transparent);
  animation: gridDrift 18s linear infinite;
}

.tool::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-warm), transparent 58%);
  animation: topLineGlow 4.8s ease-in-out infinite;
}

.tool > * {
  position: relative;
  z-index: 1;
}

.tool-heading {
  display: grid;
  gap: 16px;
}

.motion-field {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.motion-line {
  position: absolute;
  right: 42px;
  width: 220px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(15, 118, 110, 0.28), transparent);
  transform: translateX(-18px);
  animation: dataLine 6.5s ease-in-out infinite;
}

.motion-line:nth-child(1) {
  top: 96px;
}

.motion-line:nth-child(2) {
  top: 132px;
  right: 116px;
  width: 150px;
  animation-delay: 1.2s;
}

.motion-line:nth-child(3) {
  bottom: 74px;
  right: 76px;
  width: 190px;
  animation-delay: 2.3s;
}

.motion-cell {
  position: absolute;
  width: 36px;
  height: 24px;
  border: 1px solid rgba(15, 118, 110, 0.15);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.42);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8);
  opacity: 0.24;
  animation: cellPulse 5.4s ease-in-out infinite;
}

.motion-cell:nth-child(4) {
  right: 278px;
  top: 92px;
}

.motion-cell:nth-child(5) {
  right: 202px;
  top: 178px;
  animation-delay: 1.7s;
}

.motion-cell:nth-child(6) {
  right: 318px;
  bottom: 92px;
  animation-delay: 3s;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  font-weight: 820;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  max-width: 420px;
  font-size: 46px;
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  font-size: 21px;
  line-height: 1.25;
}

label,
input,
button,
.result,
.loading-steps li {
  font-size: 15px;
  line-height: 1.45;
}

.convert-form {
  display: grid;
  gap: 12px;
}

label {
  color: var(--muted-strong);
  font-weight: 760;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 116px;
  gap: 10px;
}

input,
button {
  height: 52px;
  border-radius: 8px;
  font: inherit;
}

input {
  width: 100%;
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 0 16px;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9), 0 12px 26px rgba(15, 23, 42, 0.05);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

input::placeholder {
  color: #98a2b3;
}

input:focus {
  outline: none;
  border-color: rgba(15, 118, 110, 0.74);
  box-shadow: 0 0 0 4px rgba(15, 118, 110, 0.11), 0 16px 34px rgba(15, 23, 42, 0.08);
}

button {
  position: relative;
  overflow: hidden;
  border: 0;
  color: #fff;
  background: #101828;
  font-weight: 820;
  cursor: pointer;
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.18);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

button::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 18%, rgba(255, 255, 255, 0.2) 45%, transparent 64%);
  transform: translateX(-110%);
  transition: transform 520ms ease;
}

button:hover {
  transform: translateY(-1px);
  background: #182230;
  box-shadow: 0 22px 42px rgba(15, 23, 42, 0.22);
}

button:hover::before {
  transform: translateX(110%);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.56;
  transform: none;
  box-shadow: none;
}

.result {
  grid-column: 2;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.8);
  animation: resultIn 220ms ease both;
}

.result[data-kind="working"] {
  color: var(--work);
  border-color: rgba(38, 82, 164, 0.18);
  background: #f5f7ff;
}

.result[data-kind="success"] {
  color: var(--ok);
  border-color: rgba(8, 116, 67, 0.2);
  background: #f0fdf4;
}

.result[data-kind="error"] {
  color: var(--error);
  border-color: rgba(180, 35, 24, 0.22);
  background: #fff5f5;
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(243, 245, 247, 0.78);
  backdrop-filter: blur(20px);
}

.loading-shell {
  position: relative;
  width: min(440px, 100%);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 26px;
  animation: liftIn 220ms ease both;
}

.loading-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 118, 110, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 118, 110, 0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: linear-gradient(135deg, transparent, rgba(0, 0, 0, 0.5), transparent 72%);
}

.loading-shell > *:not(.loading-grid) {
  position: relative;
  z-index: 1;
}

.scanner {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-warm), transparent);
  animation: scan 1.35s linear infinite;
}

.loading-shell h2 {
  margin-top: 8px;
}

.progress-track {
  height: 6px;
  margin: 18px 0 16px;
  border-radius: 999px;
  background: #e8edf0;
  overflow: hidden;
}

.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #101828, var(--accent));
  transition: width 360ms ease;
}

.loading-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.loading-steps li {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
}

.loading-steps li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1px solid currentColor;
}

.loading-steps li[data-state="active"] {
  color: var(--accent);
}

.loading-steps li[data-state="done"] {
  color: var(--text);
}

@keyframes scan {
  from {
    transform: translateX(-100%);
  }
  to {
    transform: translateX(100%);
  }
}

@keyframes markSheen {
  0%,
  54% {
    transform: translateX(-120%);
  }
  72%,
  100% {
    transform: translateX(120%);
  }
}

@keyframes gridDrift {
  from {
    background-position: 0 0, 0 0, 0 0;
  }
  to {
    background-position: 0 0, 34px 34px, 34px 34px;
  }
}

@keyframes topLineGlow {
  0%,
  100% {
    opacity: 0.78;
  }
  50% {
    opacity: 1;
  }
}

@keyframes dataLine {
  0%,
  100% {
    opacity: 0.16;
    transform: translateX(-16px);
  }
  50% {
    opacity: 0.62;
    transform: translateX(16px);
  }
}

@keyframes cellPulse {
  0%,
  100% {
    opacity: 0.16;
    transform: translateY(0) scale(0.98);
  }
  50% {
    opacity: 0.38;
    transform: translateY(-4px) scale(1);
  }
}

@keyframes resultIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes enterSoft {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes enterTool {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes liftIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.992);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 900px) {
  .tool {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 38px;
  }

  .result {
    grid-column: 1;
  }

  h1 {
    max-width: 560px;
    font-size: 42px;
  }
}

@media (max-width: 680px) {
  .page {
    width: min(100vw - 24px, 900px);
    gap: 46px;
    padding: 20px 0 40px;
  }

  .tool {
    min-height: 0;
    padding: 28px 22px;
  }

  h1 {
    font-size: 36px;
    line-height: 1.08;
  }

  .input-row {
    grid-template-columns: 1fr;
  }

  button {
    width: 100%;
  }
}

@media (max-width: 430px) {
  .brand {
    gap: 9px;
  }

  .brand-title {
    font-size: 13px;
  }

  h1 {
    font-size: 31px;
  }
}

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