:root {
  --bg: #f3f6fb;
  --card: #ffffff;
  --text: #142033;
  --muted: #5e6a7f;
  --line: #d9e1ef;
  --accent: #2563eb;
  --accent-2: #0f172a;
  --good: #16a34a;
  --warn: #ea580c;
  --bad: #dc2626;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 22px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #eef3fb 0%, var(--bg) 100%);
  color: var(--text);
}
.app-shell { max-width: 1320px; margin: 0 auto; padding: 24px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero { display: grid; grid-template-columns: 2fr 1fr; gap: 24px; padding: 28px; margin-bottom: 20px; }
.eyebrow { text-transform: uppercase; letter-spacing: .18em; color: var(--accent); font-size: 12px; margin: 0 0 8px; font-weight: 700; }
.hero h1 { margin: 0 0 10px; font-size: clamp(30px, 5vw, 48px); }
.hero-text { margin: 0; color: var(--muted); max-width: 700px; line-height: 1.6; }
.tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.tag { background: #e8f0ff; color: #1742a0; padding: 8px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; }
.hero-stats { display: grid; gap: 14px; align-content: center; }
.mini-stat { background: #f8fbff; border: 1px solid var(--line); border-radius: 18px; padding: 18px; }
.mini-stat span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.mini-stat strong { font-size: 28px; }
.top-grid { display: grid; gap: 18px; margin-bottom: 18px; }
.top-grid-v3 { grid-template-columns: 1.1fr 1fr .95fr .9fr; }
.controls-card, .progress-card, .tips-card, .tabs, .alerts-card, .chart-card, .guide-grid .card, .body-grid .card, .analytics-grid .card { padding: 22px; }
label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 10px; }
select, input {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 14px;
  font-size: 15px; background: white; color: var(--text); margin-top: 6px;
}
.phase-box, .subcard, .tracker-item, .metric, .alert-item, .kpi-box, .diag-item, .summary-pill {
  margin-top: 18px; padding: 16px; border: 1px solid var(--line); border-radius: 18px; background: #f8fbff;
}
.phase-box h3, h2, h3, h4 { margin-top: 0; }
.phase-box p, .phase-box li, .section-text, .chart-note, .timer-note, .diag-item p, td, li { color: var(--muted); line-height: 1.55; }
.progress-bar-wrap { width: 100%; background: #e9eef8; border-radius: 999px; overflow: hidden; height: 18px; margin: 12px 0; }
.progress-bar { height: 100%; width: 0; background: linear-gradient(90deg, var(--accent), #60a5fa); }
.stack-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.secondary-btn, .tab-btn, .file-import-btn {
  appearance: none; border: 1px solid var(--line); background: white; color: var(--text);
  padding: 10px 14px; border-radius: 14px; font-weight: 600; cursor: pointer; transition: .2s ease;
  text-decoration: none; display: inline-flex; align-items: center; justify-content: center;
}
.secondary-btn:hover, .tab-btn:hover, .file-import-btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.tabs { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 18px; }
.tab-btn.active { background: var(--accent-2); color: white; border-color: var(--accent-2); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.day-list, .tracker-list, .guide-grid, .body-grid, .analytics-grid { display: grid; gap: 18px; }
.day-card { padding: 22px; }
.day-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.done-toggle, .checkline { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; }
.columns-2, .body-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
.columns-2, .kpi-grid, .guide-grid, .analytics-grid, .mini-metrics { display: grid; gap: 14px; }
.subcard { margin-top: 0; }
.exercise-table, .logs-table, .simple-table {
  width: 100%; border-collapse: collapse; margin-top: 16px; overflow: hidden; border-radius: 18px; border: 1px solid var(--line);
}
.exercise-table thead, .logs-table thead, .simple-table thead { background: #eef4ff; }
.exercise-table th, .exercise-table td, .logs-table th, .logs-table td, .simple-table th, .simple-table td { padding: 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.circuit-list { display: grid; gap: 10px; grid-template-columns: repeat(2, minmax(0,1fr)); margin-top: 16px; }
.circuit-item { background: #f8fbff; border: 1px solid var(--line); border-radius: 16px; padding: 14px; }
.tracker-item-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.alerts-list, .diagnostic-list { display: grid; gap: 12px; }
.alert-item.good { border-color: rgba(22,163,74,.25); background: rgba(22,163,74,.07); }
.alert-item.warn { border-color: rgba(234,88,12,.25); background: rgba(234,88,12,.08); }
.alert-item.bad { border-color: rgba(220,38,38,.25); background: rgba(220,38,38,.08); }
.form-grid { display: grid; gap: 14px; grid-template-columns: repeat(2, minmax(0,1fr)); }
.compact-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.metric-grid, .kpi-grid { display: grid; gap: 14px; grid-template-columns: repeat(2, minmax(0,1fr)); }
.metric span, .kpi-box span, .summary-pill span { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
.metric strong, .kpi-box strong, .summary-pill strong { font-size: 24px; }
.chart-card canvas { width: 100%; height: auto; background: white; border-radius: 18px; border: 1px solid var(--line); }
.two-equal { grid-template-columns: repeat(2, minmax(0,1fr)); }
.guide-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
.analytics-grid { grid-template-columns: 1.05fr 1fr; }
.analytics-summary-card .mini-metrics { grid-template-columns: 1fr; }
.empty-state { color: var(--muted); }
.timer-wrap { display: grid; gap: 12px; }
.timer-readout { font-size: 44px; font-weight: 800; text-align: center; letter-spacing: .05em; }
.timer-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.summary-pill { margin-top: 0; }
.diag-item h4 { margin: 0 0 8px; }
@media (max-width: 1120px) {
  .top-grid-v3, .hero, .guide-grid, .analytics-grid, .body-grid, .two-equal { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .app-shell { padding: 14px; }
  .compact-grid, .form-grid, .columns-2, .metric-grid, .kpi-grid, .circuit-list { grid-template-columns: 1fr; }
  .day-head, .tracker-item-head { flex-direction: column; align-items: stretch; }
  .exercise-table, .exercise-table thead, .exercise-table tbody, .exercise-table tr, .exercise-table th, .exercise-table td { display: block; width: 100%; }
  .exercise-table thead { display: none; }
  .exercise-table tr { border-bottom: 1px solid var(--line); padding: 8px 0; }
  .exercise-table td { border: 0; padding: 10px 12px; }
  .exercise-table td::before { content: attr(data-label); display: block; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 4px; }
}