:root {
  --bg: #f4f7f6;
  --surface: #ffffff;
  --text: #1a2b28;
  --muted: #6b7d79;
  --border: #dfe7e5;
  --primary: #0f766e;
  --primary-dark: #0b5c56;
  --danger: #b3261e;
  --danger-bg: #fdecea;
  --warn: #a15c00;
  --warn-bg: #fdf3e3;
  --chip-bg: #eef3f2;
  --chip-selected-bg: #0f766e;
  --chip-selected-text: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101614;
    --surface: #182420;
    --text: #e7efec;
    --muted: #93a29e;
    --border: #2a3733;
    --chip-bg: #1f2b27;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

.hidden { display: none !important; }

.screen { width: 100%; min-height: 100vh; }

/* Login */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 32px 24px;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}
.login-card h1 { margin: 0 0 4px; font-size: 1.4rem; }
.login-card input {
  width: 100%;
  padding: 12px 14px;
  margin: 16px 0 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

.muted { color: var(--muted); font-size: 0.9rem; }
.error { color: var(--danger); font-size: 0.85rem; }

/* App shell */
.app-topbar {
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 16px;
  background: var(--primary);
  color: #fff;
}
.app-header h1 {
  margin: 0;
  font-size: 1.05rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.link-btn {
  background: none;
  border: none;
  color: #fff;
  opacity: 0.85;
  cursor: pointer;
  font-size: 0.85rem;
  text-decoration: underline;
}

.tabs {
  display: flex;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.tab-btn {
  flex: 1;
  padding: 12px 4px;
  border: none;
  background: none;
  color: var(--muted);
  font-size: 0.8rem;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}
.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: 48px;
  width: 100%;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.card {
  background: var(--surface);
  border-radius: 14px;
  padding: 18px;
  margin-bottom: 18px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.card h2 { margin: 0 0 14px; font-size: 1.05rem; }

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}
.row label {
  flex: 1 1 130px;
  min-width: 0;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.row input {
  width: 100%;
  min-width: 0;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

.block-label {
  display: block;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.block-label input[type="text"] {
  width: 100%;
  margin-top: 4px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}
textarea {
  width: 100%;
  min-width: 0;
  margin-top: 4px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
  resize: vertical;
}

.section-label {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 14px 0 8px;
}

.chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}
.chip {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--chip-bg);
  color: var(--text);
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, transform 0.1s;
}
.chip:active { transform: scale(0.97); }
.chip.selected {
  background: var(--chip-selected-bg);
  color: var(--chip-selected-text);
  border-color: var(--chip-selected-bg);
}
.chip.danger.selected { background: var(--danger); border-color: var(--danger); }

.bristol-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 4px;
}
@media (min-width: 480px) {
  .bristol-group { grid-template-columns: repeat(7, 1fr); }
}
.bristol-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 4px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--chip-bg);
  color: var(--text);
  cursor: pointer;
  text-align: center;
}
.bristol-chip b { font-size: 1.1rem; }
.bristol-chip span { font-size: 0.65rem; line-height: 1.2; color: var(--muted); }
.bristol-chip.selected { background: var(--primary); border-color: var(--primary); }
.bristol-chip.selected span, .bristol-chip.selected b { color: #fff; }
.bristol-chip.warn.selected { background: var(--warn); border-color: var(--warn); }
.bristol-chip.danger.selected { background: var(--danger); border-color: var(--danger); }

button.primary {
  width: 100%;
  padding: 13px;
  margin-top: 16px;
  border: none;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
}
button.primary:active { background: var(--primary-dark); }

.link-btn-inline {
  display: block;
  margin: 10px auto 0;
  background: none;
  border: none;
  color: var(--muted);
  text-decoration: underline;
  font-size: 0.82rem;
  cursor: pointer;
}

.feedback {
  min-height: 1.2em;
  font-size: 0.85rem;
  margin: 8px 0 0;
  color: var(--primary);
}
.feedback.error { color: var(--danger); }

/* Historique */
.day-group { margin-bottom: 20px; }
.day-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 8px;
}
.entry {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  background: var(--surface);
  border-radius: 10px;
  padding: 10px 12px;
  margin-bottom: 6px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.entry .entry-main { flex: 1; min-width: 0; }
.entry .entry-time { font-size: 0.75rem; color: var(--muted); }
.entry .entry-title { font-size: 0.92rem; margin: 2px 0; overflow-wrap: anywhere; }
.entry .entry-tags { font-size: 0.75rem; color: var(--muted); overflow-wrap: anywhere; }
.entry-actions {
  display: flex;
  gap: 2px;
  flex-shrink: 0;
}
.entry .delete-btn, .entry .edit-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 1rem;
  padding: 2px 6px;
}
.entry.diarrhea { border-left: 3px solid var(--danger); }

/* Corrélations */
.stat-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.tag-row { margin-bottom: 10px; }
.tag-row-head { display: flex; justify-content: space-between; font-size: 0.85rem; margin-bottom: 4px; }
.tag-row-bar-bg { height: 8px; border-radius: 4px; background: var(--chip-bg); overflow: hidden; }
.tag-row-bar { height: 100%; background: var(--primary); }
.tag-row.elevated .tag-row-bar { background: var(--danger); }
.low-confidence { color: var(--muted); font-size: 0.72rem; }
.disclaimer { font-size: 0.75rem; color: var(--muted); margin-top: 16px; }