/* ═══════════════════════════════════════════════
   VITAL HEALTH TRACKER — styles.css
   ═══════════════════════════════════════════════ */

/* ── RESET & BASE ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Backgrounds */
  --bg:         #f7f6f3;
  --surface:    #ffffff;
  --surface2:   #f0ede8;

  /* Borders */
  --border:     rgba(0, 0, 0, 0.08);
  --border2:    rgba(0, 0, 0, 0.15);

  /* Text */
  --text:       #1a1917;
  --text2:      #6b6962;
  --text3:      #9e9990;

  /* Brand */
  --accent:       #2a5cff;
  --accent-light: #eef1ff;
  --accent-text:  #1840cc;

  /* Semantic */
  --green:        #1d9e75;
  --green-light:  #e1f5ee;
  --amber:        #ba7517;
  --amber-light:  #faeeda;
  --red:          #d44b3a;
  --red-light:    #fdecea;
  --purple:       #6d54d4;
  --purple-light: #eeedfe;
  --blue:         #2a7adf;
  --blue-light:   #e6f1fb;

  /* Chart palette */
  --c-steps:    #378ADD;
  --c-sleep:    #7F77DD;
  --c-water:    #1D9E75;
  --c-calories: #EF9F27;
  --c-weight:   #D85A30;
  --c-mood:     #D4537E;
  --c-workout:  #639922;

  /* Radii */
  --r:    12px;
  --r-sm:  8px;
  --r-xs:  5px;
}

html { font-size: 15px; }

body {
  font-family: 'DM Sans', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }
strong { font-weight: 600; }
code { font-family: 'DM Mono', monospace; font-size: 0.875em; background: var(--surface2); padding: 1px 5px; border-radius: 3px; }

/* ── LAYOUT ── */
.app {
  display: flex;
  min-height: 100vh;
}

/* ── SIDEBAR ── */
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 28px 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  z-index: 20;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 0 22px 28px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--text);
  user-select: none;
}
.sidebar-logo .logo-dot { color: var(--accent); }

.nav-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0 22px 10px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 22px;
  font-size: 14px;
  color: var(--text2);
  background: none;
  border: none;
  border-left: 2px solid transparent;
  width: 100%;
  text-align: left;
  transition: background 0.12s, color 0.12s, border-color 0.12s;
}
.nav-item:hover { background: var(--bg); color: var(--text); }
.nav-item.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-light);
  font-weight: 500;
}
.nav-icon { font-size: 15px; width: 20px; text-align: center; flex-shrink: 0; }

.sidebar-bottom {
  margin-top: auto;
  padding: 16px 22px;
  border-top: 1px solid var(--border);
}

.streak-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--amber-light);
  color: var(--amber);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: var(--r-sm);
}

/* ── MAIN ── */
.main {
  margin-left: 220px;
  flex: 1;
  padding: 32px 36px 64px;
  max-width: 1080px;
}

/* ── TOPBAR ── */
.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
  gap: 16px;
}
.topbar-title {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
}
.topbar-date {
  font-size: 13px;
  color: var(--text3);
  margin-top: 3px;
}

/* ── SECTIONS ── */
.page { display: none; }
.page.active { display: block; }

/* ── CARDS ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px 24px;
}
.card-title {
  font-size: 11px;
  font-weight: 500;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 14px;
}
.card-sub {
  font-size: 13px;
  color: var(--text3);
  margin-bottom: 10px;
}
.mt12 { margin-top: 12px; }
.mt16 { margin-top: 16px; }

/* ── METRICS GRID ── */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.metric-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px 18px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.metric-tile:hover { border-color: var(--border2); }

.tile-label { font-size: 12px; color: var(--text3); margin-bottom: 6px; }
.tile-val {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text);
}
.tile-unit { font-size: 11px; color: var(--text3); margin-top: 5px; }
.tile-bar { height: 3px; background: var(--surface2); border-radius: 2px; margin-top: 13px; overflow: hidden; }
.tile-fill { height: 3px; border-radius: 2px; transition: width 0.6s cubic-bezier(0.34,1.56,0.64,1); }

/* ── ROW LAYOUTS ── */
.row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

/* ── CHART WRAPPERS ── */
.chart-wrap { position: relative; width: 100%; }
.h160 { height: 160px; }
.h180 { height: 180px; }
.h200 { height: 200px; }

/* ── WATER DOTS ── */
.water-dots { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 6px; }
.water-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--surface2);
  border: 1px solid var(--border2);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0; /* hide text initially */
}
.water-dot.filled {
  background: var(--c-water);
  border-color: var(--c-water);
  font-size: 16px;
}
.water-dot.filled::after { content: '💧'; }

/* ── LOG TABLE ── */
.log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.log-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 500;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--border);
}
.log-table td {
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.log-table tr:last-child td { border-bottom: none; }
.col-icon { width: 42px; }

.log-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.mono { font-family: 'DM Mono', monospace; font-size: 13px; }
.muted { color: var(--text3); font-size: 13px; }

/* ── BADGES ── */
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  padding: 2px 9px;
  border-radius: 20px;
}
.badge-good { background: var(--green-light); color: var(--green); }
.badge-warn { background: var(--amber-light); color: var(--amber); }
.badge-low  { background: var(--red-light);  color: var(--red); }

.empty-msg {
  padding: 24px 0;
  text-align: center;
  color: var(--text3);
  font-size: 14px;
}

/* ── STATS ROW ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}
.stat-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px 18px;
}
.stat-label {
  font-size: 11px;
  color: var(--text3);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: 6px;
}
.stat-val {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.03em;
}
.stat-delta { font-size: 12px; margin-top: 4px; }
.delta-up   { color: var(--green); }
.delta-down { color: var(--red); }
.delta-neu  { color: var(--text3); }

/* ── BMI ── */
.bmi-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}
.bmi-number {
  font-size: 56px;
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1;
  margin-bottom: 6px;
}
.bmi-cat-label {
  font-size: 15px;
  font-weight: 500;
  color: var(--text2);
  margin-bottom: 20px;
}
.bmi-bar-track {
  height: 10px;
  border-radius: 5px;
  background: linear-gradient(to right,
    #378add 0%,
    #1d9e75 26%,
    #efc12a 54%,
    #d44b3a 78%,
    #a32d2d 100%
  );
  position: relative;
  margin-bottom: 8px;
}
.bmi-needle {
  position: absolute;
  top: -5px;
  width: 4px;
  height: 20px;
  background: var(--text);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: left 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
  left: 10%;
}
.bmi-scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text3);
  margin-bottom: 16px;
}
.bmi-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 16px;
}
.bmi-leg-item {
  padding: 8px 12px;
  border-radius: var(--r-sm);
  font-size: 12px;
  font-weight: 500;
}
.bmi-underweight { background: var(--blue-light);   color: var(--blue); }
.bmi-normal      { background: var(--green-light);  color: var(--green); }
.bmi-overweight  { background: var(--amber-light);  color: var(--amber); }
.bmi-obese       { background: var(--red-light);    color: var(--red); }

.bmi-tip {
  font-size: 13px;
  color: var(--text2);
  line-height: 1.65;
  background: var(--bg);
  padding: 12px 14px;
  border-radius: var(--r-sm);
  min-height: 20px;
}

.profile-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 4px;
}
.full-col { grid-column: 1 / -1; }

.tdee-section { display: none; }
.tdee-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 8px;
}
.tdee-box {
  background: var(--bg);
  border-radius: var(--r-sm);
  padding: 10px 12px;
  font-size: 12px;
  color: var(--text2);
}
.tdee-box strong {
  display: block;
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-top: 3px;
}

/* ── FORMS ── */
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group label { font-size: 12px; font-weight: 500; color: var(--text2); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  font-size: 14px;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(42, 92, 255, 0.12);
}
.form-group textarea { resize: vertical; min-height: 64px; }

/* ── BUTTONS ── */
.btn-log {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--r-sm);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.btn-log:hover { opacity: 0.88; }

.btn-primary {
  background: var(--text);
  color: var(--surface);
  border: none;
  border-radius: var(--r-sm);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  transition: opacity 0.15s;
}
.btn-primary:hover { opacity: 0.82; }

.btn-secondary {
  background: var(--surface);
  color: var(--text2);
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  padding: 8px 14px;
  font-size: 13px;
  transition: background 0.15s;
}
.btn-secondary:hover { background: var(--bg); }

.btn-danger {
  background: var(--surface);
  color: var(--red);
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  padding: 8px 14px;
  font-size: 13px;
  transition: background 0.15s;
}
.btn-danger:hover { background: var(--red-light); border-color: var(--red); }

.btn-icon-del {
  background: none;
  border: none;
  color: var(--text3);
  font-size: 18px;
  line-height: 1;
  padding: 2px 6px;
  border-radius: 4px;
  transition: color 0.15s;
}
.btn-icon-del:hover { color: var(--red); }

/* ── CHIP GROUPS ── */
.chip-group { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  border: 1px solid var(--border2);
  background: var(--surface);
  color: var(--text2);
  cursor: pointer;
  transition: all 0.12s;
  font-family: inherit;
}
.chip:hover { background: var(--bg); color: var(--text); }
.chip.selected {
  background: var(--text);
  color: var(--surface);
  border-color: var(--text);
}

/* ── HISTORY CONTROLS ── */
.history-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.history-controls select {
  padding: 8px 10px;
  border: 1px solid var(--border2);
  border-radius: var(--r-sm);
  font-family: inherit;
  font-size: 13px;
  background: var(--surface);
  color: var(--text);
  outline: none;
}

/* ── SETTINGS ── */
.settings-card { max-width: 500px; }
.settings-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* ── MODAL ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.38);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface);
  border-radius: var(--r);
  border: 1px solid var(--border);
  padding: 28px;
  width: 100%;
  max-width: 400px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-title {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.modal-fields { display: flex; flex-direction: column; gap: 14px; }
.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 22px;
}

/* ── TOAST ── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(70px);
  background: var(--text);
  color: var(--surface);
  padding: 10px 22px;
  border-radius: var(--r-sm);
  font-size: 14px;
  font-weight: 500;
  z-index: 200;
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 860px) {
  .sidebar { display: none; }
  .main { margin-left: 0; padding: 20px 16px 60px; }
  .row-2col { grid-template-columns: 1fr; }
  .bmi-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .settings-form { grid-template-columns: 1fr; }
  .profile-form { grid-template-columns: 1fr; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }

  /* Mobile bottom nav */
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    z-index: 20;
  }
  .mobile-nav button {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 10px 4px;
    background: none;
    border: none;
    font-size: 10px;
    color: var(--text3);
    font-family: inherit;
    transition: color 0.12s;
  }
  .mobile-nav button.active { color: var(--accent); }
  .mobile-nav .mn-icon { font-size: 20px; }
}

@media (min-width: 861px) {
  .mobile-nav { display: none; }
}