:root {
  --bg: oklch(97% 0.008 200);
  --surface: oklch(99% 0.004 200);
  --surface-muted: oklch(93% 0.01 200);
  --border: oklch(80% 0.014 200);

  --ink: oklch(20% 0.02 200);
  --ink-soft: oklch(38% 0.03 200);

  --brand: oklch(38% 0.10 200);
  --brand-deep: oklch(26% 0.075 200);
  --brand-bright: oklch(46% 0.105 200);

  --white: oklch(100% 0 0);
  --danger: oklch(45% 0.18 25);
  --danger-bg: oklch(95% 0.03 25);
  --warning: oklch(45% 0.15 70);
  --warning-bg: oklch(95% 0.05 70);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
  --dur-fast: 150ms;
  --dur-base: 250ms;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Figtree', -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  font-optical-sizing: auto;
  line-height: 1.55;
  font-size: 1rem;
}
h1, h2, p { margin: 0; }
button { font: inherit; }

:focus-visible {
  outline: 2px solid var(--brand-bright);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.screen__title { font-size: 1.375rem; font-weight: 800; letter-spacing: -0.01em; }
.screen__lead { margin-top: var(--space-3); color: var(--ink-soft); }
.screen__tema { margin-top: var(--space-2); font-style: italic; color: var(--ink-soft); }
.screen__tema:empty { display: none; }

.chip-nivel {
  display: inline-block;
  margin-top: var(--space-3);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--brand-deep);
  font-size: 0.8125rem;
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.9rem 1.5rem;
  min-height: 44px;
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--dur-base) var(--ease-out-quart),
              transform var(--dur-fast) var(--ease-out-quart);
}
.btn:active { transform: scale(0.97); }
.btn--primary { background: var(--brand); color: var(--white); }
.btn--primary:hover { background: var(--brand-bright); }
.btn--primary:disabled { background: var(--border); cursor: not-allowed; transform: none; }
.btn--block { width: 100%; }

.btn--text {
  display: block;
  width: 100%;
  margin-top: var(--space-4);
  padding: var(--space-3);
  background: transparent;
  border: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.9375rem;
  text-align: center;
  cursor: pointer;
  min-height: 44px;
}
.btn--text:hover { color: var(--brand); }

.field { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-5); }
.field[hidden] { display: none; }
.field__label { font-weight: 600; font-size: 0.9375rem; }
.field input, .field select, .field textarea {
  font: inherit;
  font-size: 1rem;
  padding: 0.75rem 0.875rem;
  min-height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--ink);
}
.field select { appearance: auto; }
.field textarea { resize: vertical; min-height: 5.5rem; }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { border-color: var(--brand); }

.field__sorpresa {
  display: block;
  margin-top: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: transparent;
  border: none;
  color: var(--brand);
  font-weight: 600;
  font-size: 0.9375rem;
  text-align: left;
  cursor: pointer;
  min-height: 44px;
}
.field__sorpresa:hover { color: var(--brand-bright); }
.field__sorpresa.is-activo { color: var(--ink-soft); }
.field--checkbox { flex-direction: row; align-items: center; gap: var(--space-3); cursor: pointer; }
.field--checkbox input[type="checkbox"] { width: 1.125rem; height: 1.125rem; flex-shrink: 0; accent-color: var(--brand); cursor: pointer; }
.field--checkbox .field__label { font-weight: 600; font-size: 0.9375rem; cursor: pointer; }
.field__opt { font-weight: 400; color: var(--ink-soft); }

#form-login button[type="submit"], #form-generar button[type="submit"] { margin-top: var(--space-8); }

.form-error {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--danger-bg);
  color: var(--danger);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
}
.form-error__link { display: inline-block; margin-top: var(--space-2); color: var(--brand); font-weight: 700; }

.form-notice {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--warning-bg);
  color: var(--warning);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
}

.screen-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6) clamp(1.25rem, 4vw, 2rem);
}
.screen-login[hidden] { display: none; }
.login-card { width: 100%; max-width: 360px; }
.login-card__logo { font-weight: 800; font-size: 1.125rem; letter-spacing: -0.01em; }
.login-card__logo span { color: var(--brand); }
.login-card__title { margin-top: var(--space-6); font-size: 1.5rem; font-weight: 800; }
.login-card__help { margin-top: var(--space-6); font-size: 0.9375rem; color: var(--ink-soft); text-align: center; }
.login-card__help a { color: var(--brand); font-weight: 600; }

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4) clamp(1.25rem, 4vw, 2rem);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.app-header__logo { font-weight: 800; font-size: 1.0625rem; letter-spacing: -0.01em; margin: 0; }
.app-header__logo span { color: var(--brand); }
.app-header__user { display: flex; align-items: center; gap: var(--space-4); }
.app-header__name { font-size: 0.875rem; color: var(--ink-soft); font-weight: 600; }
.app-header__logout {
  background: transparent;
  border: none;
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.875rem;
  padding: var(--space-2);
  cursor: pointer;
}
.app-header__logout:hover { color: var(--brand); }

.app-main {
  width: 100%;
  max-width: 480px;
  margin-inline: auto;
  padding: var(--space-8) clamp(1.25rem, 4vw, 2rem) var(--space-12);
}

.loading__steps { margin-top: var(--space-8); display: flex; flex-direction: column; gap: var(--space-1); list-style: none; padding: 0; }
.loading__step {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-3);
  color: var(--ink-soft);
  font-size: 0.9375rem;
}
.loading__marker {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--border);
  position: relative;
}
.loading__step.is-active { color: var(--ink); font-weight: 700; }
.loading__step.is-active .loading__marker {
  border-color: var(--brand);
  animation: loading-pulse 1.6s ease-in-out infinite;
}
.loading__step.is-done { color: var(--ink); }
.loading__step.is-done .loading__marker {
  background: var(--brand);
  border-color: var(--brand);
}
.loading__step.is-done .loading__marker::after {
  content: '';
  position: absolute;
  left: 6px; top: 3px;
  width: 6px; height: 10px;
  border: solid var(--white);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.loading__note { margin-top: var(--space-6); color: var(--ink-soft); font-size: 0.875rem; }
.loading__refuerzo { margin-top: var(--space-2); }

@keyframes loading-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

@media (prefers-reduced-motion: reduce) {
  .loading__step.is-active .loading__marker { animation: none; }
  .btn, .btn--text { transition: none; }
}