:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ink: #1f1717;
  --bg: #f8f3f1;
  --panel: #fffaf8;
  --panel-soft: #fff6f2;
  --line: #ead8d2;
  --primary: #8f1d2c;
  --primary-dark: #681522;
  --accent: #0f766e;
  --accent-soft: #eaf6f3;
  --danger: #b4233b;
  --muted: #6f5f5f;
  --muted-soft: #9b8d89;
  --shadow-warm: rgba(104, 21, 34, .12);
  --text-xs: 12px;
  --text-sm: 13px;
  --text-md: 14px;
  --text-button: 15px;
  --text-lg: 19px;
  --text-xl: 24px;
  --text-number: 30px;
  --leading-xs: 17px;
  --leading-sm: 19px;
  --leading-md: 20px;
  --leading-lg: 24px;
  --leading-xl: 29px;
  --leading-number: 34px;
  --weight-body: 450;
  --weight-label: 700;
  --weight-strong: 800;
  color: var(--ink);
  background: var(--bg);
}

* { box-sizing: border-box; }

body {
  min-height: 100vh;
  margin: 0;
  background: radial-gradient(circle at top left, rgba(234, 216, 210, .65), transparent 36rem), var(--bg);
  font-size: var(--text-md);
  line-height: var(--leading-md);
}

button,
input,
textarea { font: inherit; }

button,
label.file-button { -webkit-tap-highlight-color: transparent; }

.app-shell {
  width: min(100%, 520px);
  min-height: 100vh;
  margin: 0 auto;
  padding: calc(14px + env(safe-area-inset-top)) 14px calc(22px + env(safe-area-inset-bottom));
}

.hero {
  padding: 18px 16px 14px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: linear-gradient(180deg, var(--panel), var(--panel-soft));
  box-shadow: 0 14px 36px var(--shadow-warm);
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--accent);
  font-size: 11px;
  font-weight: var(--weight-strong);
  letter-spacing: .11em;
  line-height: 15px;
  text-transform: uppercase;
}

h1,
h2,
h3 { margin: 0; }

h1 {
  font-size: var(--text-xl);
  font-weight: var(--weight-strong);
  letter-spacing: -.035em;
  line-height: var(--leading-xl);
}

h2 {
  font-size: var(--text-lg);
  font-weight: var(--weight-strong);
  letter-spacing: -.01em;
  line-height: var(--leading-lg);
}

h3 {
  font-size: 15px;
  font-weight: 750;
  line-height: var(--leading-md);
}

.hero-copy {
  margin: 7px 0 0;
  color: #5f504f;
  font-size: var(--text-md);
  font-weight: var(--weight-body);
  line-height: var(--leading-md);
}

.privacy-line {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: var(--accent);
  font-size: var(--text-xs);
  font-weight: var(--weight-strong);
  line-height: var(--leading-xs);
}

.privacy-notice {
  display: grid;
  gap: 12px;
  margin: 12px 0 0;
  padding: 14px;
  border: 1px solid #e7c8c0;
  border-radius: 17px;
  background: var(--accent-soft);
  box-shadow: 0 10px 30px rgba(15, 118, 110, .08);
}

.privacy-notice[hidden] { display: none; }

.privacy-notice p {
  margin: 6px 0 0;
  color: #4a3b3b;
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
}

.privacy-notice ul {
  display: grid;
  gap: 6px;
  margin: 10px 0 0;
  padding-left: 18px;
  color: #4a3b3b;
  font-size: var(--text-sm);
  line-height: var(--leading-sm);
}

.tabs {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin: 12px 0;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 250, 248, .94);
  box-shadow: 0 10px 26px rgba(104, 21, 34, .08);
  backdrop-filter: blur(10px);
}

.tab {
  min-height: 36px;
  padding: 9px 6px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: #675352;
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 740;
  line-height: 16px;
  transition: background 120ms ease, color 120ms ease, box-shadow 120ms ease, transform 120ms ease;
}

.tab.is-active {
  background: var(--primary);
  color: var(--panel);
  box-shadow: 0 8px 18px rgba(143, 29, 44, .22);
}

.tab:active,
.primary-button:active,
.secondary-button:active,
.file-button:active,
.small-button:active,
.ghost-button:active { transform: translateY(1px); }

.section {
  display: none;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel);
  box-shadow: 0 12px 30px rgba(31, 23, 23, .06);
}

.section.is-active { display: block; }

.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 13px;
}

.subcopy,
.empty-state {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: var(--leading-sm);
}

.reading-form {
  display: grid;
  gap: 12px;
}

.measurement-panel {
  display: grid;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, #fffdfa, var(--panel-soft));
}

.pressure-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 8px;
  align-items: end;
}

.pressure-divider {
  align-self: center;
  color: var(--muted-soft);
  font-size: 26px;
  font-weight: 600;
}

label {
  display: grid;
  gap: 5px;
  color: #4a3b3b;
  font-size: var(--text-xs);
  font-weight: var(--weight-label);
  line-height: 16px;
}

.measurement-label {
  color: var(--primary);
  font-size: 11px;
  font-weight: var(--weight-strong);
  letter-spacing: .1em;
  line-height: 15px;
}

.pressure-field,
.pulse-field {
  position: relative;
  gap: 4px;
}

.pressure-field input {
  padding: 8px 10px 7px;
  font-size: var(--text-number);
  font-weight: var(--weight-strong);
  letter-spacing: -.04em;
  line-height: var(--leading-number);
}

.pressure-field small,
.pulse-field small,
.datetime-field small,
label span small {
  color: var(--muted-soft);
  font-size: 11px;
  font-weight: 600;
  line-height: 15px;
}

.pulse-field {
  grid-template-columns: 1fr auto;
  align-items: end;
}

.pulse-field > span { grid-column: 1 / -1; }
.pulse-field input { grid-column: 1; }
.pulse-field small { grid-column: 2; padding-bottom: 11px; }

input,
textarea {
  width: 100%;
  padding: 10px 11px;
  border: 1px solid #d7c6c0;
  border-radius: 13px;
  outline: none;
  background: var(--panel);
  color: var(--ink);
  font-size: 16px;
  line-height: 20px;
}

input:focus,
textarea:focus,
button:focus-visible,
.file-button:focus-within {
  border-color: rgba(15, 118, 110, .5);
  box-shadow: 0 0 0 3px rgba(15, 118, 110, .14);
}

textarea {
  min-height: 42px;
  resize: vertical;
}

.datetime-field input {
  min-height: 44px;
  padding: 11px 12px;
  border-radius: 15px;
  background: #fffdfa;
  color: #2d2221;
  font-size: var(--text-button);
  font-weight: 650;
  line-height: 20px;
}

.datetime-field small { margin-top: -1px; }

.primary-button,
.secondary-button,
.ghost-button,
.small-button,
.file-button {
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease, background 120ms ease;
}

.primary-button {
  width: 100%;
  min-height: 46px;
  padding: 12px 14px;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  color: var(--panel);
  font-size: var(--text-button);
  font-weight: var(--weight-strong);
  line-height: var(--leading-md);
  box-shadow: 0 10px 20px rgba(143, 29, 44, .22);
}

.secondary-button,
.file-button {
  width: 100%;
  min-height: 44px;
  padding: 11px 14px;
  border-color: #e7c8c0;
  background: var(--panel);
  color: var(--primary-dark);
  font-size: var(--text-button);
  font-weight: var(--weight-strong);
  line-height: var(--leading-md);
  text-align: center;
}

.quiet-button {
  background: #fffdfa;
  color: #7b2a36;
  box-shadow: none;
}

.ghost-button {
  padding: 6px 10px;
  border-color: var(--line);
  background: #fffdfa;
  color: #4a3b3b;
  font-size: var(--text-xs);
  font-weight: var(--weight-label);
}

.small-button {
  padding: 7px 10px;
  border-color: var(--line);
  background: #fffdfa;
  color: #4a3b3b;
  font-size: var(--text-xs);
  font-weight: var(--weight-label);
}

.delete-control,
.delete-button { color: var(--danger); }

.form-error {
  padding: 10px;
  border: 1px solid #efc1c9;
  border-radius: 12px;
  background: #fff4f4;
  color: var(--danger);
  font-size: var(--text-xs);
  line-height: 1.4;
}

.trend-card,
.backup-card,
.settings-card,
.danger-zone {
  display: grid;
  gap: 12px;
  margin: 0 0 13px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel-soft);
}

.trend-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.range-toggle {
  display: flex;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
}

.range-button {
  padding: 5px 8px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: var(--weight-label);
}

.range-button.is-active {
  background: var(--accent);
  color: white;
}

.trend-chart { min-height: 128px; }
.trend-svg { display: block; width: 100%; height: auto; }
.trend-grid { stroke: #d7c6c0; stroke-width: 1; }
.trend-line { fill: none; stroke-linecap: round; stroke-linejoin: round; stroke-width: 3; }
.systolic-line,
.systolic-point { stroke: var(--primary); }
.diastolic-line,
.diastolic-point { stroke: var(--accent); }
.trend-point { fill: var(--panel); stroke-width: 2; }
.trend-label { fill: var(--muted); font-size: 11px; }

.trend-empty,
.empty-state {
  display: grid;
  gap: 7px;
  padding: 18px;
  border: 1px dashed #d7c6c0;
  border-radius: 16px;
  color: var(--muted);
  text-align: center;
}

.empty-state strong,
.trend-empty strong {
  color: #4a3b3b;
  font-size: var(--text-md);
  font-weight: var(--weight-strong);
}

.empty-state-action {
  justify-self: center;
  margin-top: 4px;
  color: var(--primary-dark);
}

.trend-legend {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  color: #5f504f;
  font-size: var(--text-xs);
  font-weight: 650;
  line-height: var(--leading-xs);
}

.trend-legend span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
}

.systolic-dot { background: var(--primary); }
.diastolic-dot { background: var(--accent); }

.history-list {
  display: grid;
  gap: 9px;
}

.history-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fffdfa;
}

.history-content {
  display: grid;
  gap: 3px;
}

.history-content strong {
  font-size: var(--text-md);
  line-height: var(--leading-md);
}

.history-meta,
.history-note {
  color: var(--muted);
  font-size: var(--text-xs);
  line-height: var(--leading-xs);
}

.history-note { margin: 4px 0 0; }

.history-actions {
  display: flex;
  gap: 6px;
}

.report-form {
  display: grid;
  gap: 12px;
  margin-bottom: 13px;
}

.range-fieldset {
  margin: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
}

.range-fieldset legend {
  color: #4a3b3b;
  font-size: var(--text-xs);
  font-weight: var(--weight-label);
}

.report-range-control {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
}

.report-range-control label {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fffdfa;
}

.report-range-control input { width: auto; }

.report-note,
.settings-note {
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: var(--leading-sm);
}

.report-actions {
  display: grid;
  gap: 8px;
}

.backup-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.file-button {
  display: grid;
  place-items: center;
}

.file-button input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.settings-status {
  min-height: 0;
  color: var(--accent);
  font-size: var(--text-xs);
  font-weight: var(--weight-label);
  line-height: var(--leading-xs);
}

.settings-status[data-tone="error"] { color: var(--danger); }

.privacy-row {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 10px;
  align-items: start;
  padding: 10px 0;
  border-top: 1px solid rgba(234, 216, 210, .78);
}

.privacy-row:first-of-type { border-top: 0; }

.privacy-row strong {
  color: #4a3b3b;
  font-size: var(--text-xs);
  font-weight: var(--weight-strong);
  line-height: var(--leading-xs);
}

.privacy-row span {
  color: var(--muted);
  font-size: var(--text-sm);
  font-weight: 400;
  line-height: var(--leading-sm);
}

.medical-note {
  padding-top: 10px;
  border-top: 1px solid rgba(234, 216, 210, .78);
}

.danger-zone {
  margin-bottom: 0;
  background: #fffafa;
  border-color: #efc1c9;
}

.danger-zone .delete-control {
  background: transparent;
  border-color: #efc1c9;
  color: var(--danger);
  box-shadow: none;
}

.report-preview {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel);
  max-height: 340px;
  overflow: auto;
}

.footer {
  padding: 14px 6px 0;
  color: var(--muted);
  font-size: var(--text-xs);
  font-weight: 400;
  line-height: var(--leading-xs);
}

.footer p { margin: 0 0 7px; }

@media (max-width: 370px) {
  .app-shell { padding-left: 10px; padding-right: 10px; }
  .pressure-field input { font-size: 26px; line-height: 30px; }
  .tab { font-size: var(--text-xs); }
  .history-item { display: grid; }
  .backup-actions { grid-template-columns: 1fr; }
  .privacy-row { grid-template-columns: 1fr; gap: 3px; }
}