:root {
  color-scheme: light;
  --page: #f3f2ee;
  --surface: #fbfaf7;
  --surface-soft: #f1f2ed;
  --text: #303833;
  --muted: #68736c;
  --border: #d8ddd7;
  --primary: #526b5a;
  --primary-strong: #344b3c;
  --selected: #e6ede7;
  --danger: #9b3b32;
  --danger-soft: #fff0ed;
  --success: #256a40;
  --success-soft: #edf7f0;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 15% 15%, rgba(116, 145, 125, .15), transparent 34rem),
    var(--page);
  color: var(--text);
  font-size: 16px;
  line-height: 1.55;
}

a { color: var(--primary-strong); }

.auth-layout {
  width: min(100% - 32px, 1040px);
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(360px, .72fr);
  align-items: center;
  gap: clamp(32px, 7vw, 88px);
  padding: 48px 0;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  border-radius: 14px;
  background: var(--primary-strong);
  color: #fff;
  font-size: 21px;
  font-weight: 750;
  letter-spacing: -.06em;
}

.brand-copy h1 {
  max-width: 620px;
  margin: 0 0 18px;
  font-size: clamp(34px, 5.5vw, 62px);
  line-height: 1.04;
  letter-spacing: -.055em;
  font-weight: 720;
}

.brand-copy p {
  max-width: 560px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.trust-list {
  display: grid;
  gap: 11px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
}

.trust-list li::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  margin-right: 11px;
  border-radius: 999px;
  background: #73917c;
}

.auth-card {
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--border);
  border-radius: 22px;
  background: rgba(251, 250, 247, .96);
  box-shadow: 0 20px 55px rgba(45, 55, 48, .09);
}

.auth-card h2 { margin: 0 0 8px; font-size: 27px; letter-spacing: -.035em; }
.auth-card > p { margin: 0 0 24px; color: var(--muted); }

.field { margin: 0 0 18px; }
.field label { display: block; margin-bottom: 7px; font-weight: 650; }
.field-hint { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }

input, select, button { font: inherit; }

input, select {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--text);
}

input[readonly] { background: var(--surface-soft); color: var(--muted); }

#codexForm label:has(input[type="checkbox"]) { display: flex; align-items: center; gap: 10px; min-height: 44px; cursor: pointer; }
#codexForm input[type="checkbox"] { width: 20px; min-height: 20px; height: 20px; flex: 0 0 20px; accent-color: var(--primary); }
#connections, #learningTasks { overflow-wrap: anywhere; }
#learningTasks button, #tokenBox button { margin: 8px 8px 0 0; }

button, .button-link {
  min-height: 46px;
  padding: 11px 17px;
  border: 1px solid var(--primary);
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  font-weight: 680;
  text-align: center;
  text-decoration: none;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease;
}

button:hover, .button-link:hover { background: var(--primary-strong); border-color: var(--primary-strong); }
button:active, .button-link:active { transform: translateY(1px); }
button:disabled { cursor: wait; opacity: .68; }

button.secondary, .button-link.secondary {
  border-color: var(--border);
  background: var(--surface);
  color: var(--primary-strong);
}

button.secondary:hover, .button-link.secondary:hover { background: var(--selected); }

:focus-visible { outline: 3px solid rgba(67, 103, 78, .35); outline-offset: 3px; }

.form-actions { display: grid; gap: 10px; margin-top: 24px; }
.form-actions.inline { grid-template-columns: 1fr auto; }

.status {
  min-height: 24px;
  margin: 14px 0 0;
  color: var(--muted);
}

.status.error, .notice.error {
  padding: 11px 13px;
  border: 1px solid #ecc5be;
  border-radius: 10px;
  background: var(--danger-soft);
  color: var(--danger);
}

.status.success, .notice.success {
  padding: 11px 13px;
  border: 1px solid #c7dfcd;
  border-radius: 10px;
  background: var(--success-soft);
  color: var(--success);
}

.invite-summary {
  display: grid;
  gap: 10px;
  margin: 0 0 24px;
  padding: 17px;
  border: 1px solid var(--border);
  border-radius: 13px;
  background: var(--surface-soft);
}

.summary-row { display: flex; justify-content: space-between; gap: 24px; }
.summary-row span { color: var(--muted); }
.summary-row strong { text-align: right; }
.hidden { display: none !important; }

.topbar {
  width: min(100% - 32px, 900px);
  margin: 0 auto;
  padding: 28px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar a { font-weight: 650; text-decoration: none; }
.page-shell { width: min(100% - 32px, 900px); margin: 0 auto; padding: 38px 0 80px; }
.page-shell h1 { margin: 0 0 8px; font-size: clamp(30px, 5vw, 44px); letter-spacing: -.045em; }
.page-lead { margin: 0 0 28px; color: var(--muted); font-size: 17px; }
.panel { padding: clamp(22px, 4vw, 34px); border: 1px solid var(--border); border-radius: 18px; background: var(--surface); box-shadow: 0 12px 38px rgba(45, 55, 48, .065); }
.panel + .panel { margin-top: 20px; }
.panel h2 { margin: 0 0 7px; }
.panel-copy { margin: 0 0 22px; color: var(--muted); }
.invite-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 16px; }
.copy-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; }

@media (max-width: 760px) {
  .auth-layout { grid-template-columns: 1fr; align-content: center; gap: 28px; padding: 34px 0; }
  .brand-copy h1 { font-size: 38px; }
  .brand-copy p, .trust-list { font-size: 15px; }
  .trust-list { display: none; }
  .auth-card { border-radius: 18px; }
  .invite-grid, .form-actions.inline, .copy-row { grid-template-columns: 1fr; }
  .copy-row button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}