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

:root {
  --bg: #f5f1e8;
  --fg: #111111;
  --fg-muted: #555555;
  --fg-dim: #525252;
  --border: #cccccc;
  --warn-bg: #fef3c7;
  --cta-bg: #111111;
  --cta-fg: #ffffff;
  --cta-disabled-bg: #cccccc;
  --cta-disabled-fg: #555555;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 22px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

.wordmark {
  max-width: 720px;
  margin: 0 auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
  color: var(--fg-dim);
  padding: 16px 24px;
  letter-spacing: 0.02em;
}

.wordmark a {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.wordmark a:hover,
.wordmark a:focus-visible {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

#root {
  min-height: 100vh;
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 96px;
}

h1 {
  font-size: 36px;
  line-height: 1.2;
  margin: 0 0 12px;
  font-weight: 700;
}

h2 {
  font-size: 28px;
  line-height: 1.25;
  margin: 32px 0 12px;
  font-weight: 700;
}

p { margin: 0 0 16px; }
ul, ol { margin: 0 0 16px; padding-left: 24px; }
li { margin-bottom: 8px; }

a {
  color: var(--fg);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 2px;
}

a:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 3px;
}

.lead {
  font-size: 24px;
  margin: 0 0 16px;
}

.section {
  border-top: 2px solid var(--border);
  padding-top: 24px;
  margin-top: 32px;
}

.frequency-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0 12px;
}

.frequency-option {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  min-height: 60px;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.frequency-option input[type="radio"] {
  width: 28px;
  height: 28px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--fg);
}

.frequency-option-label {
  flex: 1;
}

.frequency-option-note {
  display: block;
  font-size: 18px;
  color: var(--fg-muted);
  margin-top: 4px;
}

.frequency-presets {
  margin-left: 44px;
  margin-top: 8px;
  display: none;
  flex-direction: column;
  gap: 8px;
}

.frequency-presets.is-visible { display: flex; }

.frequency-presets .frequency-option {
  border-style: dashed;
}

.frequency-note {
  font-size: 18px;
  color: var(--fg-muted);
  font-style: italic;
  margin-top: 16px;
}

.cta {
  display: inline-block;
  min-width: 200px;
  min-height: 60px;
  padding: 16px 32px;
  margin-top: 32px;
  background: var(--cta-bg);
  color: var(--cta-fg);
  font-size: 22px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}

.cta:disabled {
  background: var(--cta-disabled-bg);
  color: var(--cta-disabled-fg);
  cursor: not-allowed;
}

.cta:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 3px;
}

.calibration-hint {
  font-size: 18px;
  color: var(--fg-muted);
  margin: 16px 0 12px;
}

.calibration-stage {
  display: flex;
  justify-content: center;
  margin: 16px 0;
  overflow-x: auto;
}

.calibration-rect {
  border: 3px solid var(--fg);
  background: transparent;
  box-sizing: border-box;
  flex-shrink: 0;
}

.calibration-controls {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 24px 0 16px;
}

.step-btn {
  min-width: 80px;
  min-height: 80px;
  font-size: 36px;
  font-weight: 700;
  background: var(--bg);
  color: var(--fg);
  border: 2px solid var(--fg);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
  line-height: 1;
}

.step-btn:disabled {
  color: var(--cta-disabled-fg);
  border-color: var(--border);
  cursor: not-allowed;
}

.step-btn:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 3px;
}

.grid-stage {
  display: flex;
  justify-content: center;
  margin: 16px 0;
  overflow-x: auto;
}

#amsler-grid {
  display: block;
  background: var(--bg);
  flex-shrink: 0;
  touch-action: none;
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
}

.eye-label {
  font-size: 24px;
  font-weight: 600;
  text-align: center;
  margin: 16px 0;
}

.test-controls {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 24px 0 16px;
  flex-wrap: wrap;
}

.secondary-btn {
  min-height: 60px;
  padding: 16px 24px;
  font-size: 18px;
  font-weight: 600;
  background: var(--bg);
  color: var(--fg);
  border: 2px solid var(--fg);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}

.secondary-btn:disabled {
  color: var(--cta-disabled-fg);
  border-color: var(--border);
  cursor: not-allowed;
}

.secondary-btn:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 3px;
}

.disclaimer-band {
  font-size: 18px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 16px 0 24px;
}

.cronologia-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0 24px;
}

.session-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 24px 0;
}

.session-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--fg);
  min-height: 60px;
}

.session-card:hover,
.session-card:focus-visible {
  border-color: var(--fg);
  outline: none;
}

.session-card:active {
  background: #f5f5f5;
}

.session-date {
  font-size: 22px;
  font-weight: 600;
}

.session-thumbs {
  display: flex;
  gap: 16px;
}

.session-thumb {
  width: 100px;
  height: 100px;
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.session-grid {
  display: block;
  width: 100%;
  max-width: 520px;
  height: auto;
  margin: 0 auto;
}

.back-link {
  margin: 0 0 16px;
  font-size: 18px;
}

.danger-zone {
  margin-top: 48px;
  padding: 24px;
  border: 2px solid var(--warn-bg);
  border-radius: 8px;
}

.danger-zone h2 {
  margin: 0 0 12px;
  font-size: 22px;
}

.danger-zone p {
  margin: 0 0 16px;
  font-size: 18px;
  color: var(--fg-muted);
}

.warn-btn {
  min-height: 60px;
  padding: 16px 24px;
  background: var(--warn-bg);
  color: var(--fg);
  font-size: 22px;
  font-weight: 700;
  border: 2px solid var(--fg);
  border-radius: 8px;
  cursor: pointer;
  font-family: inherit;
}

.warn-btn:disabled {
  background: var(--cta-disabled-bg);
  color: var(--cta-disabled-fg);
  cursor: not-allowed;
}

.warn-btn:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 3px;
}

.confirm-dialog {
  max-width: 480px;
  padding: 32px;
  border: 2px solid var(--fg);
  border-radius: 8px;
  background: var(--bg);
  color: var(--fg);
  font-family: inherit;
}

.confirm-dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.confirm-dialog h2 {
  font-size: 26px;
  margin: 0 0 16px;
}

.confirm-dialog p {
  font-size: 20px;
  margin: 0 0 16px;
}

.dialog-actions {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
  margin-top: 24px;
  flex-wrap: wrap;
}

.page-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.05em;
  color: var(--fg-dim);
  text-align: center;
}