/* 360Fitness — design system + layout
   Mobile-first SPA, scales to dashboard on desktop. */

:root {
  --bg: #f4f2ec; --bg-2: #ebe8df;
  --surface: #ffffff; --surface-2: #faf8f2; --surface-3: #f0ede5;
  --ink: #0e1b26; --ink-2: #2b3a45; --ink-mute: #6b7780; --ink-faint: #98a0a6;
  --line: #e5e2d9; --line-strong: #d6d2c7; --line-soft: #ece9e0;
  --primary: #0e3a4a; --primary-2: #0a2a38; --primary-soft: #dfe6e8; --primary-tint: #eef1f2; --primary-fg: #ffffff;
  --accent-warm: #c77a2a; --success: #2f7a4f; --success-soft: #e3efe7;
  --warn: #b6772a; --warn-soft: #f3e8d6; --danger: #b5443a; --danger-soft: #f3dad7;
  --info: #2f6b96; --info-soft: #dfe9f1; --muscle: #4b6b86; --hydration: #2f6b96;
  --shadow-xs: 0 1px 2px rgba(14,27,38,0.08); --shadow-sm: 0 4px 14px rgba(14,27,38,0.08);
  --font-sans: "Inter", ui-sans-serif, system-ui, sans-serif;
  --radius-md: 12px; --radius-lg: 16px; --radius-xl: 20px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1418; --bg-2: #111b21; --surface: #131f26; --surface-2: #16242c; --surface-3: #1b2c34;
    --ink: #eef2f3; --ink-2: #cdd6da; --ink-mute: #93a0a6; --ink-faint: #6f7d83;
    --line: #243339; --line-strong: #2f4047; --line-soft: #1f2d33;
    --primary: #2f7d96; --primary-2: #246378; --primary-soft: #1c333c; --primary-tint: #18272e;
    --primary-fg: #ffffff;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 15px;
  line-height: 1.45;
}
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 15px; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* App shell — mobile by default */
.app-shell {
  max-width: 430px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  position: relative;
}

.page {
  flex: 1;
  padding: 20px 18px 96px;
}

/* Typography */
h1, h2, h3 { color: var(--ink); margin: 0; font-weight: 600; letter-spacing: -0.01em; }
h1 { font-size: 24px; }
h2 { font-size: 18px; }
h3 { font-size: 15px; }
p { margin: 0; color: var(--ink-2); }
small, .small { font-size: 12px; color: var(--ink-mute); }

.muted { color: var(--ink-mute); }
.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-mute); margin: 18px 0 10px; font-weight: 600; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
  padding: 18px;
}
.card + .card { margin-top: 12px; }
.card.elevated { box-shadow: var(--shadow-sm); }
.card-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.gradient-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: var(--primary-fg);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.gradient-card h2, .gradient-card h3 { color: var(--primary-fg); }
.gradient-card p { color: rgba(255,255,255,0.85); }

/* Metric grid (2x2) */
.metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.metric-card {
  background: var(--surface-2);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  padding: 14px;
}
.metric-card .label { font-size: 12px; color: var(--ink-mute); text-transform: uppercase; letter-spacing: 0.06em; }
.metric-card .value { font-size: 22px; font-weight: 600; color: var(--ink); margin-top: 4px; }
.metric-card .unit { font-size: 12px; color: var(--ink-mute); margin-left: 4px; }
.metric-card .delta { font-size: 12px; margin-top: 4px; }
.metric-card .delta.down { color: var(--success); }
.metric-card .delta.up { color: var(--danger); }
.metric-card .delta.flat { color: var(--ink-mute); }

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: var(--primary-fg);
  border: none;
  padding: 12px 18px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  width: 100%;
  transition: background 0.15s ease, transform 0.05s ease;
}
.btn-primary:hover { background: var(--primary-2); }
.btn-primary:active { transform: scale(0.99); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--line-strong);
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 500;
}
.btn-ghost:hover { background: var(--primary-tint); }

.btn-danger {
  background: transparent;
  color: var(--danger);
  border: 1px solid var(--danger);
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 500;
}
.btn-danger:hover { background: var(--danger-soft); }

.btn-row { display: flex; gap: 8px; margin-top: 12px; }

/* Forms */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field label { font-size: 13px; color: var(--ink-2); font-weight: 500; }
.field input, .field select, .field textarea {
  padding: 11px 12px;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  color: var(--ink);
  outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--primary); }

/* Bottom nav */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 100%; max-width: 430px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  background: var(--surface);
  border-top: 1px solid var(--line);
  padding: 8px 6px calc(8px + env(safe-area-inset-bottom));
  z-index: 10;
}
.bottom-nav a {
  display: flex; flex-direction: column; align-items: center;
  gap: 2px; padding: 6px 4px;
  color: var(--ink-mute);
  font-size: 11px; font-weight: 500;
  border-radius: 8px;
}
.bottom-nav a.active { color: var(--primary); background: var(--primary-tint); }
.bottom-nav a .ico { font-size: 18px; line-height: 1; }
.bottom-nav a svg { width: 20px; height: 20px; }

/* Sidenav (desktop) */
.sidenav { display: none; }

/* Header */
.page-header { margin-bottom: 16px; }
.page-header .greeting { font-size: 13px; color: var(--ink-mute); }
.page-header h1 { margin-top: 2px; }

/* Chips */
.chip-row { display: flex; gap: 8px; overflow-x: auto; padding: 4px 0; margin: 8px 0 14px; scrollbar-width: none; }
.chip-row::-webkit-scrollbar { display: none; }
.chip {
  white-space: nowrap;
  padding: 7px 12px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--ink-2);
  cursor: pointer;
}
.chip.active { background: var(--primary); color: var(--primary-fg); border-color: var(--primary); }

/* Macro bar */
.macro-row { margin: 10px 0; }
.macro-row .top { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 4px; color: var(--ink-2); }
.macro-bar { height: 8px; background: var(--surface-3); border-radius: 999px; overflow: hidden; }
.macro-bar .fill { height: 100%; border-radius: 999px; background: var(--primary); transition: width 0.4s ease; }
.macro-bar .fill.protein { background: var(--success); }
.macro-bar .fill.carbs { background: var(--accent-warm); }
.macro-bar .fill.fats { background: var(--info); }

/* Badges */
.badge {
  display: inline-block;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.info { background: var(--info-soft); color: var(--info); }
.badge.primary { background: var(--primary-tint); color: var(--primary); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.neutral { background: var(--surface-3); color: var(--ink-mute); }

/* List */
.list { display: flex; flex-direction: column; gap: 8px; }
.list-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 10px;
}

/* Animations */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes countIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.3s ease both; }
.slide-up { animation: slideUp 0.35s ease both; }
.count-in { animation: countIn 0.25s ease both; }

/* Chart container */
.chart-card { padding: 14px; }
.chart-card svg { display: block; width: 100%; height: auto; }
.chart-tabs { display: flex; gap: 6px; margin-bottom: 8px; }
.chart-tabs .chip { padding: 5px 10px; font-size: 12px; }

/* Login */
.login-shell {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.login-card { width: 100%; max-width: 380px; }
.login-card h1 { margin-bottom: 6px; }
.login-card .sub { color: var(--ink-mute); margin-bottom: 22px; }
.login-error { background: var(--danger-soft); color: var(--danger); padding: 10px 12px; border-radius: 10px; font-size: 13px; margin-bottom: 12px; }

/* Tables (staff) */
.table { width: 100%; border-collapse: collapse; background: var(--surface); border-radius: 12px; overflow: hidden; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--line-soft); font-size: 14px; }
.table th { background: var(--surface-2); font-weight: 600; color: var(--ink-2); font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--surface-2); }

/* Desktop layout */
@media (min-width: 768px) {
  .app-shell {
    max-width: 1440px;
    flex-direction: row;
    align-items: stretch;
  }
  .sidenav {
    display: flex;
    flex-direction: column;
    width: 232px;
    flex-shrink: 0;
    background: var(--surface);
    border-right: 1px solid var(--line);
    padding: 22px 14px;
    gap: 4px;
  }
  .sidenav .brand {
    font-size: 18px; font-weight: 700;
    color: var(--primary);
    padding: 4px 10px 18px;
  }
  .sidenav a {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px;
    border-radius: 10px;
    color: var(--ink-2);
    font-size: 14px;
  }
  .sidenav a:hover { background: var(--surface-2); }
  .sidenav a.active { background: var(--primary-tint); color: var(--primary); font-weight: 600; }
  .sidenav .spacer { flex: 1; }
  .sidenav .logout { color: var(--ink-mute); }
  .sidenav .nav-section {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-faint);
    padding: 14px 12px 4px;
    font-weight: 600;
  }
  .sidenav hr { border: none; border-top: 1px solid var(--line); margin: 8px 0; }
  .sidenav a svg { width: 18px; height: 18px; flex-shrink: 0; }

  .page { padding: 28px 32px; max-width: none; }
  .bottom-nav { display: none !important; }

  .metric-grid { grid-template-columns: repeat(4, 1fr); }
  .dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 18px;
    align-items: start;
  }
}

/* Staff shell wider */
.staff-shell {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 100vh;
}
@media (min-width: 768px) {
  .staff-shell { grid-template-columns: 232px 1fr; }
}

.empty {
  text-align: center;
  padding: 28px 12px;
  color: var(--ink-mute);
  font-size: 14px;
}

/* Tooltip for charts */
.chart-tooltip {
  position: absolute;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  padding: 6px 9px;
  border-radius: 8px;
  pointer-events: none;
  transform: translate(-50%, -120%);
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}