style.css

@font-face {
  font-family: 'Comfortaa';
  src: url('fonts/comfortaa-latin-wght-normal.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/jetbrains-mono-latin-500-normal.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'JetBrains Mono Fallback';
  src: local('Courier New');
  size-adjust: 100%;
  ascent-override: 102%;
  descent-override: 30%;
  line-gap-override: 0%;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --font-display: 'Comfortaa', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'JetBrains Mono Fallback', ui-monospace, SFMono-Regular, Menlo, monospace;

  --bg: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --surface: #f8fafc;
  --accent: #1b77fe;
  --accent-ink: #1d4ed8;

  --ease: cubic-bezier(0.23, 1, 0.32, 1);

  --chevron: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");

  color-scheme: light;
}

html {
  font-size: 100%;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-display);
  font-weight: 500;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration: none;
  touch-action: manipulation;
}

button {
  font: inherit;
  color: inherit;
  touch-action: manipulation;
}

:focus-visible {
  outline: 2px solid var(--accent-ink);
  outline-offset: 3px;
  border-radius: 4px;
}

[hidden] {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.mono {
  font-family: var(--font-mono);
}

.wrap {
  max-width: 480px;
  margin: 0 auto;
  padding:
    max(56px, env(safe-area-inset-top))
    max(24px, env(safe-area-inset-right))
    max(48px, env(safe-area-inset-bottom))
    max(24px, env(safe-area-inset-left));
  animation: fade 0.6s var(--ease) backwards;
}

@keyframes fade {
  from { opacity: 0; }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.gh {
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: -0.02em;
  color: var(--accent-ink);
  border-radius: 6px;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.gh:active {
  background: var(--surface);
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 40px;
  text-align: center;
}

.mark {
  width: 56px;
  height: 48px;
  color: var(--accent);
  fill: currentColor;
}

h1 {
  font-size: clamp(1.5rem, 6.4vw, 1.9rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.25;
  text-wrap: balance;
}

.lead {
  max-width: 22rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted);
  text-wrap: balance;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field label {
  font-size: 0.85rem;
}

.input {
  width: 100%;
  min-height: 48px;
  padding: 11px 14px;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color 0.2s ease;
}

.input.mono {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: -0.02em;
}

.input::placeholder {
  color: var(--muted);
}

.input:focus {
  outline: none;
  border-color: var(--accent-ink);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.14);
}

.input:disabled {
  background: var(--surface);
  opacity: 0.7;
  cursor: not-allowed;
}

.select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 40px;
  background-image: var(--chevron);
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 18px;
}

.select:invalid {
  color: var(--muted);
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  padding: 12px 20px;
  font-size: 1rem;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.16s var(--ease), background-color 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.75;
  cursor: wait;
}

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

.btn-download {
  color: #ffffff;
  background: var(--accent-ink);
}

.btn.is-busy::before {
  content: "";
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.status {
  margin-top: 16px;
  font-size: 0.9rem;
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.status[data-tone="error"] {
  color: #b91c1c;
}

.status[data-tone="warn"] {
  color: #92400e;
}

.result {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: center;
}

.result:focus {
  outline: none;
}

.result-file {
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  overflow-wrap: anywhere;
}

.result-meta {
  margin-bottom: 14px;
  font-size: 0.85rem;
  color: var(--muted);
}

.result-links {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}

.link {
  min-height: 44px;
  padding: 8px 12px;
  font-size: 0.88rem;
  color: var(--muted);
  background: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: color 0.2s ease;
}

.link:active {
  color: var(--accent-ink);
}

.note {
  margin-top: 16px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--muted);
}

.more {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.more h2 {
  margin-bottom: 2px;
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: lowercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.copy {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--muted);
  background: none;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.16s var(--ease), color 0.2s ease;
}

.copy:active {
  transform: scale(0.94);
}

.icon-check,
.is-copied .icon-copy {
  display: none;
}

.is-copied .icon-check {
  display: block;
}

.copy.is-copied {
  color: #15803d;
}

.frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.frame.will-reveal {
  opacity: 0;
  transform: translateY(12px);
}

.frame.is-in {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s var(--ease), transform 0.7s var(--ease);
}

.frame-head {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 0.85rem;
}

.frame-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px;
}

.frame-tg {
  background: #eef3f7;
  border-color: #dbe4ea;
}

.tg-badge {
  position: relative;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: #ffffff;
  background: #229ed9;
  border-radius: 50%;
  transition: transform 0.16s var(--ease);
}

.tg-badge::before {
  content: "";
  position: absolute;
  inset: -8px;
}

.tg-badge:active {
  transform: scale(0.94);
}

.input-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 3px 3px 16px;
  background: #ffffff;
  border: 1px solid #dbe4ea;
  border-radius: 999px;
}

.frame-term {
  color: #e2e8f0;
  background: var(--ink);
  border-color: var(--ink);
}

.frame-term .frame-head {
  border-bottom: 1px solid #1e293b;
}

.dots {
  display: flex;
  gap: 6px;
}

.dots i {
  width: 8px;
  height: 8px;
  background: #334155;
  border-radius: 50%;
}

.term-comment {
  padding: 4px 6px 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: -0.02em;
  line-height: 1.6;
  color: #94a3b8;
  overflow-wrap: anywhere;
}

.term-line {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-left: 6px;
}

.term-line .typed::before {
  content: "$ ";
  color: #60a5fa;
  user-select: none;
  -webkit-user-select: none;
}

.frame-term .copy {
  color: #94a3b8;
}

.frame-term .copy.is-copied {
  color: #4ade80;
}

.typed {
  flex: 1;
  min-width: 0;
  padding: 9px 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: -0.02em;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.typed-rest {
  visibility: hidden;
}

.caret {
  display: inline-block;
  width: 2px;
  height: 1.1em;
  margin-left: 1px;
  vertical-align: text-bottom;
  background: currentColor;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.typed.is-typing .caret {
  opacity: 1;
  transition: none;
}

.frame-term .caret {
  width: 0.55em;
  height: 1.15em;
  background: #e2e8f0;
}

.typed {
  transition: color 0.3s ease;
}

.typed.is-flash {
  color: var(--accent-ink);
}

.frame-term .typed.is-flash {
  color: #93c5fd;
}

.icon-check {
  transform-origin: center;
}

.is-copied .icon-check {
  animation: tick 0.28s var(--ease);
}

@keyframes tick {
  from {
    opacity: 0;
    transform: scale(0.6);
  }
}

.foot {
  display: flex;
  justify-content: center;
  margin-top: 40px;
}

.foot a {
  padding: 6px 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: -0.02em;
  color: var(--muted);
  transition: color 0.2s ease;
}

.foot a:active {
  color: var(--accent-ink);
}

@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover:not(:disabled) {
    background: #1e293b;
  }

  .btn-download:hover {
    background: #1e40af;
  }

  .link:hover,
  .foot a:hover,
  .copy:hover {
    color: var(--accent-ink);
  }

  .gh:hover {
    background: var(--surface);
  }

  .tg-badge:hover {
    transform: scale(1.06);
  }

  .frame-term .copy:hover {
    color: #ffffff;
  }

  .input:hover:not(:focus):not(:disabled) {
    border-color: #cbd5e1;
  }
}

@media (prefers-reduced-motion: reduce) {
  .wrap {
    animation-duration: 0.01ms;
  }

  .frame.will-reveal {
    opacity: 1;
    transform: none;
  }

  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}