/* ── Design tokens ──────────────────────────────────────── */
:root {
  --bg: #f5f4f2;
  --surface: #ffffff;
  --border: #e2e0dc;
  --text: #1c1b1a;
  --text-muted: #6b6966;
  --accent: #4361ee;
  --accent-hover: #2f4dd4;
  --nav-bg: #1e1e2e;
  --nav-text: #b8bcd8;
  --nav-active: #89b4fa;
  --radius-sm: 5px;
  --radius: 10px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 4px 12px rgba(0,0,0,.08);
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  margin: 0;
  padding: 0;
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

/* ── Navigation ─────────────────────────────────────────── */
nav {
  background: var(--nav-bg);
  padding: 0 1.5rem;
  display: flex;
  align-items: stretch;
  height: 52px;
}

nav a, nav button {
  color: var(--nav-text);
  text-decoration: none;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  padding: 0 0.875rem;
  display: flex;
  align-items: center;
  letter-spacing: 0.01em;
  transition: color 0.15s, border-color 0.15s;
}

nav a:hover, nav button:hover { color: #fff; }

nav a.active {
  color: var(--nav-active);
  border-bottom-color: var(--nav-active);
}

nav .nav-logout {
  margin-left: auto;
  opacity: 0.6;
  font-size: 0.825rem;
}

nav .nav-logout:hover { opacity: 1; }

/* ── Page layout ────────────────────────────────────────── */
main {
  max-width: 740px;
  margin: 2.25rem auto;
  padding: 0 1.25rem;
}

h1 {
  margin: 0 0 1.5rem;
  font-size: 1.5rem;
  font-weight: 700;
}

h2 {
  margin: 0 0 0.875rem;
  font-size: 1rem;
  font-weight: 600;
}

p { margin: 0.5rem 0; }

a { color: var(--accent); }

/* ── Form controls ──────────────────────────────────────── */
label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: var(--surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

/* ── Buttons ────────────────────────────────────────────── */
button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.125rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  font-family: inherit;
  letter-spacing: 0.01em;
  transition: background 0.15s;
  white-space: nowrap;
}

button:hover { background: var(--accent-hover); }

button.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border: 1.5px solid var(--border);
}

button.btn-secondary:hover {
  background: var(--bg);
  color: var(--text);
  border-color: #c5c3bf;
}

button.btn-danger {
  background: #dc2626;
}

button.btn-danger:hover { background: #b91c1c; }

button.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

/* ── Inline form rows ───────────────────────────────────── */
.form-row {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.form-row .field   { flex: 1; min-width: 90px; }
.form-row .field-lg { flex: 2; min-width: 160px; }

.form-row input,
.form-row select { margin: 0; }

/* ── Date picker bar ────────────────────────────────────── */
.date-bar {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 1.75rem;
}

.date-bar .field { max-width: 200px; }
.date-bar input  { margin: 0; }

/* ── Cards ──────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.375rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

/* ── Tracker cards (daily log) ──────────────────────────── */
.tracker-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--border);
  border-radius: var(--radius);
  padding: 1.125rem 1.375rem;
  margin-bottom: 0.875rem;
  box-shadow: var(--shadow-sm);
}

.tracker-card h2 {
  margin: 0 0 0.875rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.tracker-mood    { border-left-color: #a855f7; }
.tracker-boolean { border-left-color: #22c55e; }
.tracker-count   { border-left-color: #f97316; }

.tracker-card form {
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.tracker-card form .field   { flex: 1; min-width: 90px; }
.tracker-card form .field-lg { flex: 2; min-width: 150px; }
.tracker-card form input    { margin: 0; }
.tracker-card form button   { flex-shrink: 0; }

/* ── Boolean widget ─────────────────────────────────────── */
.boolean-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.boolean-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
}

.boolean-label input[type="checkbox"] {
  width: 1.2rem;
  height: 1.2rem;
  cursor: pointer;
  accent-color: #16a34a;
  margin: 0;
  display: inline;
  flex-shrink: 0;
}

/* ── Type badges ────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 0.2em 0.6em;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.badge-mood    { background: #f3e8ff; color: #7e22ce; }
.badge-boolean { background: #dcfce7; color: #15803d; }
.badge-count   { background: #ffedd5; color: #c2410c; }

/* ── Tracker list (management page) ────────────────────── */
.tracker-row {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.875rem 1.25rem;
  margin-bottom: 0.625rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 0.875rem;
  flex-wrap: wrap;
}

.tracker-row-info {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  flex: 1;
  min-width: 0;
}

.tracker-row-name {
  font-weight: 600;
  font-size: 0.975rem;
}

.tracker-row-inactive { opacity: 0.5; }

.tracker-row-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tracker-row-actions form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tracker-row-actions input[type="text"] {
  width: 150px;
  padding: 0.375rem 0.625rem;
  font-size: 0.875rem;
  margin: 0;
}

/* ── Add tracker panel ──────────────────────────────────── */
.add-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin-top: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.add-panel h2 { margin-bottom: 1rem; }

/* ── Filter bar (history) ───────────────────────────────── */
.filter-bar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  gap: 0.75rem;
  align-items: flex-end;
  flex-wrap: wrap;
}

.filter-bar .field   { flex: 1; min-width: 140px; }
.filter-bar .field-sm { flex: 0 0 130px; }
.filter-bar input,
.filter-bar select   { margin: 0; }

/* ── Charts ─────────────────────────────────────────────── */
.charts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.chart-wrapper {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.125rem 1.25rem;
  box-shadow: var(--shadow-sm);
}

.chart-wrapper h2 {
  margin: 0 0 0.75rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* ── Table ──────────────────────────────────────────────── */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

th, td {
  text-align: left;
  padding: 0.625rem 1rem;
  border-bottom: 1px solid var(--border);
}

th {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: var(--bg);
  font-weight: 600;
}

td { font-size: 0.925rem; }

tr:last-child td { border-bottom: none; }

/* ── Auth page ──────────────────────────────────────────── */
.auth-wrap {
  max-width: 400px;
  margin: 3.5rem auto 0;
}

.auth-wrap p {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

/* ── Flash messages ─────────────────────────────────────── */
.flash {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0.625rem 1rem;
  background: #fffbeb;
  border: 1px solid #fcd34d;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

/* ── Accessibility ──────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}