:root {
  --bg: #0b1120;
  --bg-elev: #111827;
  --bg-card: #162033;
  --bg-input: #0f172a;
  --border: #24324a;
  --text: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #10b981;
  --accent-dark: #059669;
  --accent-soft: rgba(16, 185, 129, 0.14);
  --warn: #f59e0b;
  --warn-soft: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-soft: rgba(239, 68, 68, 0.15);
  --info: #38bdf8;
  --info-soft: rgba(56, 189, 248, 0.14);
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 72px;
}

/* Topbar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.topbar-left { display: flex; align-items: center; gap: 0.75rem; }
.brand-badge {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #0284c7);
  color: #041f15;
  font-weight: 800;
  display: grid;
  place-items: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}
.brand-title { font-size: 1.05rem; margin: 0; font-weight: 700; }
.brand-sub { font-size: 0.78rem; color: var(--text-muted); margin: 0; }
.topbar-actions { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

.status-pill {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
}
.status-pill.online { color: #34d399; background: rgba(16, 185, 129, 0.12); border-color: rgba(16, 185, 129, 0.35); }
.status-pill.offline { color: #fbbf24; background: rgba(245, 158, 11, 0.15); border-color: rgba(245, 158, 11, 0.4); }

/* Desktop/Tablet Navigation */
.main-nav {
  display: flex;
  gap: 0.35rem;
  padding: 0.55rem 1.25rem;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
  scrollbar-width: none;
}
.main-nav::-webkit-scrollbar { display: none; }
.nav-btn {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid transparent;
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.nav-btn:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-btn.active {
  background: var(--accent-soft);
  color: #34d399;
  border-color: rgba(16, 185, 129, 0.4);
}

/* Bottom Mobile Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 30;
  background: rgba(17, 24, 39, 0.96);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  display: none;
  grid-template-columns: repeat(5, 1fr);
  padding: 0.35rem 0.25rem calc(0.35rem + env(safe-area-inset-bottom));
}
.bnav-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  font-size: 1.05rem;
  padding: 0.25rem;
  cursor: pointer;
}
.bnav-btn small { font-size: 0.68rem; font-weight: 600; }
.bnav-btn.active { color: #34d399; }

@media (max-width: 768px) {
  .bottom-nav { display: grid; }
  .topbar { padding: 0.65rem 0.9rem; }
  .main-nav { padding: 0.45rem 0.9rem; }
}

/* Main Content */
.main-content {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.25rem;
  flex: 1;
}
@media (max-width: 640px) {
  .main-content { padding: 0.85rem; }
}

/* Cards & Grids */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.85rem; }
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem;
  box-shadow: var(--shadow);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}
.card-title { font-size: 1rem; font-weight: 700; margin: 0; }
.card-sub { font-size: 0.8rem; color: var(--text-muted); margin: 0.15rem 0 0; }

.kpi-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.95rem 1.05rem;
}
.kpi-label { font-size: 0.76rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.04em; }
.kpi-value { font-size: 1.45rem; font-weight: 800; margin: 0.2rem 0; color: var(--text); }
.kpi-foot { font-size: 0.78rem; color: #34d399; }

/* Buttons & Inputs */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  padding: 0.55rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: 0.15s ease;
}
.btn:hover { border-color: #475569; background: #1e293b; }
.btn-sm { padding: 0.38rem 0.7rem; font-size: 0.8rem; }
.btn-accent { background: var(--accent); color: #052e16; border-color: var(--accent); }
.btn-accent:hover { background: #34d399; }
.btn-warn { background: var(--warn); color: #271502; border-color: var(--warn); }
.btn-danger { background: var(--danger-soft); color: #fca5a5; border-color: rgba(239, 68, 68, 0.4); }
.btn-ghost { background: transparent; }
.btn-icon {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  width: 32px; height: 32px; border-radius: 8px; cursor: pointer;
}

input, select, textarea {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.48rem 0.7rem;
  font-size: 0.88rem;
  font-family: inherit;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* Status Tick Controls */
.tick-group { display: inline-flex; gap: 0.3rem; flex-wrap: wrap; }
.tick-btn {
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 0.35rem 0.62rem;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.12s;
}
.tick-btn:hover { border-color: #64748b; color: var(--text); }
.tick-btn.active-done { background: rgba(16, 185, 129, 0.22); border-color: #10b981; color: #34d399; }
.tick-btn.active-part { background: rgba(245, 158, 11, 0.22); border-color: #f59e0b; color: #fbbf24; }
.tick-btn.active-skip { background: rgba(239, 68, 68, 0.22); border-color: #ef4444; color: #fca5a5; }

/* Tags & Badges */
.tag {
  display: inline-block;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  background: var(--info-soft);
  color: #7dd3fc;
  border: 1px solid rgba(56, 189, 248, 0.3);
}
.tag-green { background: var(--accent-soft); color: #34d399; border-color: rgba(16, 185, 129, 0.35); }
.tag-warn { background: var(--warn-soft); color: #fbbf24; border-color: rgba(245, 158, 11, 0.35); }
.tag-danger { background: var(--danger-soft); color: #fca5a5; border-color: rgba(239, 68, 68, 0.35); }

/* Workout Block Formatting */
.workout-section {
  background: rgba(15, 23, 42, 0.65);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.65rem;
}
.workout-section h4 {
  margin: 0 0 0.35rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #34d399;
}
.pre-line { white-space: pre-line; margin: 0; font-size: 0.9rem; color: #e2e8f0; }

/* Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84rem;
}
th, td {
  padding: 0.6rem 0.7rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}
th {
  background: var(--bg-elev);
  color: var(--text-muted);
  font-weight: 700;
  position: sticky;
  top: 0;
  z-index: 5;
  white-space: nowrap;
}
tr:hover td { background: rgba(255, 255, 255, 0.02); }
tr.row-today td { background: rgba(16, 185, 129, 0.11) !important; }
tr.row-overdue td { background: rgba(239, 68, 68, 0.08); }

/* Progress Bar */
.progress-track {
  width: 100%;
  height: 10px;
  background: var(--bg-input);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-dark), #34d399);
  transition: width 0.25s ease;
}

/* Charts */
.chart-box {
  width: 100%;
  overflow-x: auto;
  padding-top: 0.5rem;
}
.chart-box svg {
  width: 100%;
  min-width: 520px;
  height: auto;
  display: block;
}

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: grid;
  place-items: center;
  padding: 1rem;
}
.modal.hidden, .hidden { display: none !important; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 23, 0.78);
  backdrop-filter: blur(4px);
}
.modal-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 680px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.6);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.modal-title { margin: 0.25rem 0 0; font-size: 1.15rem; }

/* Toast */
.toast {
  position: fixed;
  bottom: 82px;
  right: 1.25rem;
  z-index: 80;
  background: #064e3b;
  color: #ecfdf5;
  border: 1px solid #10b981;
  padding: 0.65rem 1rem;
  border-radius: 10px;
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow);
}