:root {
  --ink: #1a1f36;
  --ink-soft: #4f566b;
  --ink-mute: #8792a2;
  --line: #e3e8ee;
  --paper: #ffffff;
  --paper-soft: #f6f9fc;
  --accent: #635bff;
  --accent-ink: #ffffff;
  --ok: #0e9f6e;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
body { min-height: 100vh; display: flex; flex-direction: column; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.hidden { display: none !important; }

.top { display: flex; justify-content: space-between; align-items: center; padding: 22px 28px; border-bottom: 1px solid var(--line); }
.wordmark { font-weight: 700; letter-spacing: -.02em; color: var(--ink); font-size: 17px; }
.pill { font-size: 12px; color: var(--ink-mute); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }

main { width: 100%; max-width: 640px; margin: 0 auto; padding: 56px 24px 40px; flex: 1; }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -.02em; margin: 0 0 14px; font-weight: 640; }
.lede { font-size: 17px; line-height: 1.55; color: var(--ink-soft); margin: 0 0 26px; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ok); margin: 0 0 10px; }
.plain { font-size: 14px; line-height: 1.6; color: var(--ink-soft); margin: 26px 0 0; padding-top: 18px; border-top: 1px solid var(--line); }
.hint { font-size: 13px; line-height: 1.5; color: var(--ink-soft); margin: 10px 0 0; }

.waiting { display: flex; gap: 12px; align-items: flex-start; padding: 14px 16px; border: 1px solid var(--line); border-left: 3px solid var(--ok); border-radius: 8px; background: var(--paper-soft); margin: 0 0 22px; }
.waiting .dot { width: 8px; height: 8px; margin-top: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 4px rgba(14,159,110,.12); flex: none; }
.waiting-label { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--ok); font-weight: 700; }
.waiting strong { display: block; font-size: 15px; margin: 4px 0 2px; }
.waiting-from { font-size: 13px; color: var(--ink-mute); }

.transcript { font-family: var(--mono); font-size: 13px; line-height: 1.6; background: var(--ink); color: #e6e9f0; border-radius: 8px; padding: 18px 20px; margin: 0 0 28px; overflow-x: auto; white-space: pre; }
.transcript .you { color: #9ea7ff; }
.transcript .agent { color: #7ee2b8; }

.form { display: grid; gap: 16px; padding: 22px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); box-shadow: 0 1px 2px rgba(26,31,54,.04), 0 6px 20px rgba(26,31,54,.05); }
.form label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; color: var(--ink-soft); }
.form input, .form select { font: inherit; font-size: 16px; padding: 10px 12px; border: 1px solid #cfd7df; border-radius: 6px; background: var(--paper); color: var(--ink); }
.form input:focus, .form select:focus { outline: 2px solid rgba(99,91,255,.35); border-color: var(--accent); }
button.primary { font: inherit; font-weight: 600; font-size: 16px; padding: 12px 16px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-ink); cursor: pointer; }
button.primary:hover { filter: brightness(1.06); }
button.primary:disabled { opacity: .6; cursor: wait; }

.os-toggle { display: inline-flex; gap: 2px; padding: 3px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper-soft); margin: 4px 0 12px; }
.os-tab { font: inherit; font-size: 13px; font-weight: 600; padding: 6px 12px; border: 0; border-radius: 6px; background: transparent; color: var(--ink-soft); cursor: pointer; }
.os-tab.active { background: var(--paper); color: var(--ink); box-shadow: 0 1px 2px rgba(26,31,54,.12); }

.command { position: relative; margin: 0 0 8px; }
.command pre { margin: 0; padding: 18px 88px 18px 20px; background: var(--ink); color: #e6e9f0; border-radius: 8px; font-family: var(--mono); font-size: 13.5px; line-height: 1.6; overflow-x: auto; white-space: pre-wrap; word-break: break-all; }
.command.small pre { font-size: 12.5px; padding: 12px 76px 12px 14px; }
.copy { position: absolute; top: 10px; right: 10px; font: inherit; font-size: 12px; font-weight: 600; padding: 5px 10px; border: 1px solid rgba(255,255,255,.18); border-radius: 6px; background: rgba(255,255,255,.08); color: #fff; cursor: pointer; }
.copy:hover { background: rgba(255,255,255,.16); }

.steps { margin: 22px 0 6px; padding-left: 22px; font-size: 15px; line-height: 1.7; color: var(--ink); }
.steps li::marker { color: var(--ink-mute); font-weight: 600; }
details { border-top: 1px solid var(--line); padding: 12px 0; }
details summary { cursor: pointer; font-size: 14px; font-weight: 600; color: var(--ink-soft); }
details[open] summary { margin-bottom: 10px; }

.foot { padding: 18px 28px; border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-mute); }
.toast { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); padding: 10px 14px; border-radius: 8px; background: var(--ink); color: #fff; font-size: 13px; box-shadow: 0 8px 24px rgba(26,31,54,.25); }
.toast.error { background: #c0392b; }

@media (max-width: 520px) {
  main { padding: 36px 18px 32px; }
  h1 { font-size: 25px; }
  .transcript { font-size: 12px; }
}

.topnav { display: flex; gap: 18px; font-size: 13px; }
.topnav a { color: var(--ink-soft); }
h2 { font-size: 20px; letter-spacing: -.01em; margin: 34px 0 10px; }
ul.steps { list-style: disc; }
h1 br { display: none; }
@media (min-width: 640px) { h1 br { display: inline; } }

.wordmark { display: inline-flex; align-items: center; gap: 8px; }
.wordmark .mark { width: 22px; height: 22px; border-radius: 6px; display: block; }