*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0f1117;
  --card:      #1a1d27;
  --card2:     #21253a;
  --border:    #2a2e42;
  --text:      #eef0f6;
  --text-dim:  #8a8fa8;
  --text-muted:#555e7a;
  --accent:    #6c7fff;
  --normal:    #4caf50;
  --warning:   #ff9800;
  --high:      #f44336;
}

html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  min-height: 100vh;
  padding-bottom: env(safe-area-inset-bottom);
}

/* ── Layout ─────────────────────────────────────────────────────────────────── */
.app-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}
.app-title { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.app-title span { color: var(--accent); }
.logout-btn {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.page { max-width: 480px; margin: 0 auto; padding: 16px; }

/* ── Cards ───────────────────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 14px;
}
.card-title { font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 16px; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }

/* ── Stats row ───────────────────────────────────────────────────────────────── */
.stats-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 14px; }
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  text-align: center;
}
.stat-value { font-size: 2rem; font-weight: 700; line-height: 1; }
.stat-label { font-size: 0.75rem; color: var(--text-dim); margin-top: 4px; }

/* ── Log form ────────────────────────────────────────────────────────────────── */
.glucose-input-wrap { position: relative; margin-bottom: 14px; }
.glucose-input {
  width: 100%;
  background: var(--card2);
  border: 2px solid var(--border);
  border-radius: 14px;
  color: var(--text);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  padding: 20px 16px;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: border-color 0.15s;
}
.glucose-input:focus { border-color: var(--accent); }
.glucose-unit {
  position: absolute;
  right: 16px;
  bottom: 18px;
  font-size: 0.85rem;
  color: var(--text-dim);
  pointer-events: none;
}

.form-row { margin-bottom: 12px; }
.form-label { display: block; font-size: 0.8rem; color: var(--text-dim); margin-bottom: 6px; font-weight: 500; }
.form-select, .form-input {
  width: 100%;
  background: var(--card2);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-size: 1rem;
  padding: 14px 16px;
  -webkit-appearance: none;
  appearance: none;
  outline: none;
  transition: border-color 0.15s;
}
.form-select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238a8fa8' d='M6 8L0 0h12z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px; }
.form-select:focus, .form-input:focus { border-color: var(--accent); }
textarea.form-input { min-height: 90px; resize: vertical; font-family: inherit; line-height: 1.5; }

.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.btn-log {
  width: 100%;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 14px;
  font-size: 1.1rem;
  font-weight: 700;
  padding: 18px;
  cursor: pointer;
  margin-top: 6px;
  letter-spacing: 0.02em;
  -webkit-tap-highlight-color: transparent;
  transition: opacity 0.15s;
}
.btn-log:active { opacity: 0.85; }

/* ── Reading row ─────────────────────────────────────────────────────────────── */
.reading-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.reading-row:last-child { border-bottom: none; }

.reading-value {
  font-size: 1.6rem;
  font-weight: 700;
  min-width: 64px;
  text-align: center;
}
.reading-value.normal  { color: var(--normal); }
.reading-value.warning { color: var(--warning); }
.reading-value.high    { color: var(--high); }

.reading-info { flex: 1; min-width: 0; }
.reading-context { font-size: 0.9rem; font-weight: 600; }
.reading-meta { font-size: 0.75rem; color: var(--text-dim); margin-top: 2px; }
.reading-notes { font-size: 0.78rem; color: var(--text-muted); margin-top: 3px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-normal  { background: rgba(76,175,80,0.15);  color: var(--normal); }
.badge-warning { background: rgba(255,152,0,0.15);  color: var(--warning); }
.badge-high    { background: rgba(244,67,54,0.15);  color: var(--high); }

.delete-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.delete-btn:active { color: var(--high); }

/* ── Login ───────────────────────────────────────────────────────────────────── */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px 28px;
  width: 100%;
  max-width: 360px;
  text-align: center;
}
.login-title { font-size: 1.8rem; font-weight: 700; margin-bottom: 6px; }
.login-sub   { font-size: 0.9rem; color: var(--text-dim); margin-bottom: 28px; }
.pin-input {
  width: 100%;
  background: var(--card2);
  border: 2px solid var(--border);
  border-radius: 14px;
  color: var(--text);
  font-size: 1.8rem;
  font-weight: 700;
  text-align: center;
  padding: 18px;
  letter-spacing: 0.3em;
  -webkit-appearance: none;
  outline: none;
  margin-bottom: 16px;
  transition: border-color 0.15s;
}
.pin-input:focus { border-color: var(--accent); }
.error-msg { color: var(--high); font-size: 0.85rem; margin-bottom: 12px; }

/* ── Date section header ─────────────────────────────────────────────────────── */
.date-header {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 8px 0 4px;
}

/* ── Empty state ─────────────────────────────────────────────────────────────── */
.empty { color: var(--text-dim); font-size: 0.9rem; padding: 12px 0; text-align: center; }

/* ── Collapsed toggle ────────────────────────────────────────────────────────── */
.collapsible-header { cursor: pointer; user-select: none; -webkit-user-select: none; }
.collapsible-body   { display: none; padding-top: 14px; }
.collapsible-body.open { display: block; }

/* ── Emergent level ─────────────────────────────────────────────────────────── */
.reading-value.emergent { color: #cc00ff; }
.badge-emergent { background: rgba(204,0,255,0.15); color: #cc00ff; }
.stat-value.emergent { color: #cc00ff; }

/* ── Date quick-select ───────────────────────────────────────────────────────── */
.date-quick { display: flex; gap: 8px; }
.date-quick-btn {
  flex: 1;
  padding: 10px 6px;
  background: var(--card2);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: border-color 0.15s, color 0.15s;
}
.date-quick-btn.active {
  border-color: var(--accent);
  color: var(--accent);
}

/* ── Chart ───────────────────────────────────────────────────────────────────── */
.chart-wrap { position: relative; height: 200px; margin-bottom: 12px; }
.chart-legend {
  display: flex; gap: 14px; flex-wrap: wrap;
  font-size: 0.75rem; color: var(--text-dim);
  align-items: center;
}
.legend-dot {
  display: inline-block;
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-right: 4px;
}
.legend-dot.normal   { background: #4caf50; }
.legend-dot.warning  { background: #ff9800; }
.legend-dot.high     { background: #f44336; }
.legend-dot.emergent { background: #cc00ff; }

/* ── Toggle icon ─────────────────────────────────────────────────────────────── */
.toggle-icon { color: var(--accent); font-size: 1rem; }