:root {
  --bg: #0d1321;
  --panel: #141c2f;
  --panel-soft: #1b2540;
  --line: rgba(255,255,255,0.08);
  --text: #f4f7fb;
  --muted: #9fb0d0;
  --accent: #7c9cff;
  --accent-2: #58d6a7;
  --danger: #ff7d7d;
  --warning: #ffd166;
  --shadow: 0 20px 50px rgba(0,0,0,0.28);
  --radius: 20px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(124,156,255,0.16), transparent 28%),
    radial-gradient(circle at top left, rgba(88,214,167,0.11), transparent 22%),
    var(--bg);
  color: var(--text);
}

.app-shell {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}

.sidebar {
  padding: 28px 20px;
  border-right: 1px solid var(--line);
  background: rgba(10,15,26,0.6);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  height: 100vh;
}

.brand {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.muted {
  color: var(--muted);
  line-height: 1.5;
}

.side-links {
  display: grid;
  gap: 10px;
  margin: 24px 0;
}

.side-links a {
  color: var(--text);
  text-decoration: none;
  padding: 12px 14px;
  border-radius: 12px;
  background: transparent;
  border: 1px solid transparent;
}

.side-links a:hover {
  background: rgba(255,255,255,0.04);
  border-color: var(--line);
}

.content {
  padding: 28px;
}

.hero {
  background: linear-gradient(145deg, rgba(124,156,255,0.16), rgba(88,214,167,0.09));
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 28px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 10px 0 8px;
  font-size: clamp(2rem, 3vw, 3rem);
  letter-spacing: -0.04em;
}

.hero-copy {
  max-width: 720px;
  color: var(--muted);
  line-height: 1.7;
}

.pill {
  display: inline-block;
  padding: 7px 12px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--line);
  color: var(--warning);
  border-radius: 999px;
  font-size: 0.85rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  border: 0;
  border-radius: 14px;
  padding: 12px 16px;
  background: linear-gradient(135deg, var(--accent), #5f7cff);
  color: white;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 25px rgba(124,156,255,0.22);
}

.btn.secondary {
  background: rgba(255,255,255,0.08);
  box-shadow: none;
  border: 1px solid var(--line);
}

.btn.ghost {
  background: transparent;
  border: 1px solid var(--line);
  box-shadow: none;
}

.btn.small {
  padding: 8px 12px;
  font-size: 0.9rem;
}

.grid {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: linear-gradient(180deg, rgba(20,28,47,0.95), rgba(14,20,34,0.95));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}

.card.compact { margin-top: 30px; }
.card-label {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}
.big-text { font-size: 2rem; font-weight: 800; margin-top: 8px; }
.small-text { color: var(--muted); margin-top: 4px; }
.stat-card { min-height: 132px; }
.stat-value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin: 10px 0;
}
.stat-sub { color: var(--muted); }

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-head h2 { margin: 6px 0 0; font-size: 1.35rem; }
.split { align-items: flex-start; }
.progress-badge {
  padding: 9px 12px;
  border-radius: 999px;
  background: rgba(88,214,167,0.12);
  color: var(--accent-2);
  border: 1px solid rgba(88,214,167,0.2);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-grid label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.form-grid button {
  align-self: end;
}

input, select, textarea {
  width: 100%;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 14px;
  padding: 13px 14px;
  outline: none;
  font: inherit;
}

input:focus, select:focus, textarea:focus {
  border-color: rgba(124,156,255,0.55);
  box-shadow: 0 0 0 3px rgba(124,156,255,0.12);
}

.snapshot-list {
  display: grid;
  gap: 12px;
}

.snapshot-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.snapshot-row:last-child { border-bottom: 0; }
.chart-wrap {
  height: 280px;
  background: rgba(255,255,255,0.02);
  border-radius: 18px;
  border: 1px solid var(--line);
  overflow: hidden;
}

#weightChart {
  width: 100%;
  height: 100%;
  display: block;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  color: var(--muted);
  background: rgba(255,255,255,0.02);
  font-weight: 600;
}

tbody tr:hover td {
  background: rgba(255,255,255,0.03);
}

.checklist {
  display: grid;
  gap: 12px;
}

.checklist label {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.02);
}

.checklist input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent-2);
}

.upload-btn { position: relative; overflow: hidden; }

@media (max-width: 1100px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: relative;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .stats-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .content { padding: 18px; }
  .hero { padding: 20px; }
  .stats-grid, .two-col, .form-grid {
    grid-template-columns: 1fr;
  }
  .hero { flex-direction: column; }
}