/* ===== CSS Variables (Dark Mode default) ===== */
:root {
  --bg-app:       #0d1117;
  --bg-sidebar:   #161b22;
  --bg-card:      #21262d;
  --bg-input:     #161b22;
  --bg-hover:     #30363d;
  --border:       #30363d;
  --text-primary: #e6edf3;
  --text-muted:   #8b949e;
  --accent:       #6366f1;
  --accent-hover: #4f46e5;
  --accent-light: rgba(99,102,241,0.15);
  --success:      #22c55e;
  --success-light: rgba(34,197,94,0.15);
  --warning:      #f59e0b;
  --warning-light: rgba(245,158,11,0.15);
  --danger:       #ef4444;
  --danger-light: rgba(239,68,68,0.15);
  --sidebar-w:    260px;
  --topbar-h:     60px;
  --radius:       12px;
  --radius-sm:    8px;
  --shadow:       0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
  --shadow-lg:    0 4px 6px rgba(0,0,0,0.4), 0 2px 4px rgba(0,0,0,0.3);
}
[data-theme="light"] {
  --bg-app:       #f0f2f5;
  --bg-sidebar:   #ffffff;
  --bg-card:      #ffffff;
  --bg-input:     #f8fafc;
  --bg-hover:     #f1f5f9;
  --border:       #e2e8f0;
  --text-primary: #1e293b;
  --text-muted:   #64748b;
  --shadow:       0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-lg:    0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.05);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background 0.2s, color 0.2s;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed; top: 0; left: 0;
  width: var(--sidebar-w); height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  z-index: 100;
  transition: transform 0.3s ease, background 0.2s;
}
.sidebar-header {
  padding: 20px 16px;
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text-primary);
  font-weight: 700; font-size: 1.1rem;
}
.brand svg { flex-shrink: 0; }
.sidebar-nav {
  flex: 1; padding: 12px 8px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 2px;
}
.sidebar-nav .nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  color: var(--text-muted); font-size: 0.9rem; font-weight: 500;
  transition: all 0.15s;
  text-decoration: none;
}
.sidebar-nav .nav-item svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-nav .nav-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.sidebar-nav .nav-item.active { background: var(--accent-light); color: var(--accent); }
.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border);
}
.user-info {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 12px; margin-bottom: 4px;
}
.user-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent); color: white;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.9rem; flex-shrink: 0;
}
.user-name { font-size: 0.85rem; font-weight: 500; color: var(--text-primary); }
.btn-logout {
  width: 100%; display: flex; align-items: center; gap: 8px;
  padding: 9px 12px; border-radius: var(--radius-sm);
  background: none; border: none; cursor: pointer;
  color: var(--text-muted); font-size: 0.875rem; font-weight: 500;
  transition: all 0.15s; font-family: inherit;
}
.btn-logout svg { width: 16px; height: 16px; }
.btn-logout:hover { background: var(--danger-light); color: var(--danger); }

/* ===== Main Wrapper ===== */
.main-wrapper {
  margin-left: var(--sidebar-w);
  min-height: 100vh;
  display: flex; flex-direction: column;
}
.top-bar {
  position: sticky; top: 0; z-index: 50;
  height: var(--topbar-h);
  background: var(--bg-sidebar);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 24px; gap: 16px;
  transition: background 0.2s;
}
.page-title {
  flex: 1; font-size: 1.05rem; font-weight: 600;
  color: var(--text-primary);
}
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--text-primary); border-radius: 2px;
  transition: all 0.3s;
}
.theme-toggle {
  width: 36px; height: 36px; border-radius: 8px;
  background: var(--bg-hover); border: 1px solid var(--border);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); transition: all 0.15s;
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--text-primary); background: var(--bg-card); }
.theme-toggle svg { width: 16px; height: 16px; }
.icon-moon { display: none; }
[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: block; }
.main-content { flex: 1; padding: 28px 24px 80px; }

/* ===== Alerts ===== */
.alert-toast {
  margin: 12px 24px 0;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem; font-weight: 500;
  animation: slideDown 0.3s ease;
}
.alert-success { background: var(--success-light); color: var(--success); border: 1px solid rgba(34,197,94,0.3); }
.alert-error { background: var(--danger-light); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }
@keyframes slideDown { from { opacity:0; transform:translateY(-8px); } to { opacity:1; transform:translateY(0); } }

/* ===== Cards ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: background 0.2s, border-color 0.2s;
}
.card-hover:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent-light);
  transform: translateY(-1px);
  transition: all 0.2s;
}
.card-title { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); margin-bottom: 8px; }
.card-value { font-size: 2rem; font-weight: 700; color: var(--text-primary); line-height: 1.2; }
.card-sub { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* ===== Stats Grid ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; margin-bottom: 28px; }

/* ===== Buttons ===== */
.btn { display: inline-flex; align-items: center; gap: 7px; padding: 9px 18px; border-radius: var(--radius-sm); font-size: 0.875rem; font-weight: 600; border: none; cursor: pointer; transition: all 0.15s; font-family: inherit; line-height: 1; }
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--accent); color: white; }
.btn-primary:hover { background: var(--accent-hover); color: white; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #16a34a; color: white; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; color: white; }
.btn-ghost { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg-card); color: var(--text-primary); }
.btn-sm { padding: 6px 12px; font-size: 0.8rem; }
.btn-lg { padding: 13px 28px; font-size: 1rem; }
.btn-full { width: 100%; justify-content: center; }

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 0.85rem; font-weight: 500; color: var(--text-muted); margin-bottom: 6px; }
.form-control {
  width: 100%; padding: 9px 12px;
  background: var(--bg-input) !important; border: 1px solid var(--border) !important;
  border-radius: var(--radius-sm); color: var(--text-primary) !important;
  font-family: inherit; font-size: 0.875rem;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus { outline: none; border-color: var(--accent) !important; box-shadow: 0 0 0 3px var(--accent-light) !important; }
.form-control::placeholder { color: var(--text-muted); }

/* Select-Elemente: Dropdown-Liste explizit einfärben (Chrome/Firefox/Edge auf Windows) */
select.form-control,
select.form-control:focus {
  appearance: auto;
  cursor: pointer;
  color-scheme: dark;            /* teilt dem Browser mit: dunkle Palette bevorzugt */
}
[data-theme="light"] select.form-control {
  color-scheme: light;
}
select.form-control option {
  background-color: var(--bg-card);
  color: var(--text-primary);
}
select.form-control option:checked,
select.form-control option:hover {
  background-color: var(--accent);
  color: #fff;
}

.text-danger { color: var(--danger); font-size: 0.8rem; margin-top: 4px; }

/* ===== Exercise Cards (workout plan) ===== */
.exercise-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.2s;
}
.exercise-card-header {
  padding: 14px 16px;
  display: flex; align-items: center; gap: 12px;
  cursor: pointer;
}
.exercise-card-header:hover { background: var(--bg-hover); }
.exercise-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-weight: 700; font-size: 1.1rem;
}
.exercise-info { flex: 1; min-width: 0; }
.exercise-name { font-weight: 600; font-size: 0.95rem; }
.exercise-focus { font-size: 0.8rem; color: var(--text-muted); }
.exercise-badge {
  background: var(--accent-light); color: var(--accent);
  padding: 3px 8px; border-radius: 20px; font-size: 0.75rem; font-weight: 600;
  white-space: nowrap;
}
.exercise-card-body { padding: 0 16px 16px; border-top: 1px solid var(--border); }

/* ===== Set Rows (active workout) ===== */
.set-row {
  display: grid; grid-template-columns: 32px 1fr 1fr 44px;
  gap: 8px; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--border);
}
.set-row:last-child { border-bottom: none; }
.set-number { text-align: center; font-size: 0.8rem; font-weight: 600; color: var(--text-muted); }
.set-input {
  padding: 8px 10px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-primary); font-size: 0.875rem; font-family: inherit;
  text-align: center; transition: border-color 0.15s;
}
.set-input:focus { outline: none; border-color: var(--accent); }
.set-check {
  width: 36px; height: 36px; border-radius: 8px;
  border: 2px solid var(--border); background: none;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  transition: all 0.15s; color: transparent;
}
.set-check:hover { border-color: var(--success); }
.set-check.done { background: var(--success); border-color: var(--success); color: white; }
.set-row.completed { opacity: 0.7; }

/* ===== Machine Settings ===== */
.machine-settings { padding: 12px; background: var(--bg-app); border-radius: var(--radius-sm); margin-top: 8px; }
.machine-settings h6 { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.05em; }
.setting-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.setting-label { font-size: 0.8rem; color: var(--text-muted); min-width: 120px; }
.setting-control { display: flex; gap: 4px; }
.setting-btn {
  width: 30px; height: 30px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg-card);
  color: var(--text-primary); cursor: pointer; font-size: 0.875rem;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.setting-btn.active { background: var(--accent); border-color: var(--accent); color: white; }
.setting-btn:hover:not(.active) { background: var(--bg-hover); }

/* ===== Progress / Charts ===== */
.chart-container { position: relative; width: 100%; }

/* ===== Table ===== */
.data-table { width: 100%; border-collapse: collapse; }
.data-table th {
  padding: 10px 14px; text-align: left;
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--text-muted); border-bottom: 1px solid var(--border);
}
.data-table td {
  padding: 12px 14px; font-size: 0.875rem;
  border-bottom: 1px solid var(--border); color: var(--text-primary);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-hover); }

/* ===== Badges ===== */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 8px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
.badge-accent { background: var(--accent-light); color: var(--accent); }
.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }

/* ===== Workout Timer ===== */
.workout-timer {
  font-size: 1.8rem; font-weight: 700;
  color: var(--accent); font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* ===== Empty state ===== */
.empty-state {
  text-align: center; padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state svg { width: 48px; height: 48px; margin-bottom: 16px; opacity: 0.4; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-primary); margin-bottom: 8px; }
.empty-state p { font-size: 0.875rem; margin-bottom: 20px; }

/* ===== Section headers ===== */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.section-title { font-size: 1rem; font-weight: 700; }

/* ===== Grid helpers ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gap-12 { gap: 12px; }
.mb-4 { margin-bottom: 4px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.flex-wrap { flex-wrap: wrap; }

/* ===== Public pages (login/register) ===== */
.public-wrapper { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 20px; position: relative; }
.public-theme-toggle { position: fixed; top: 16px; right: 16px; }
.auth-card { width: 100%; max-width: 420px; }
.auth-logo { text-align: center; margin-bottom: 24px; }
.auth-logo .logo-icon { width: 56px; height: 56px; background: var(--accent); border-radius: 14px; display: flex; align-items: center; justify-content: center; margin: 0 auto 12px; }
.auth-logo h1 { font-size: 1.5rem; font-weight: 700; }
.auth-logo p { color: var(--text-muted); font-size: 0.875rem; }
.auth-footer { text-align: center; margin-top: 16px; font-size: 0.875rem; color: var(--text-muted); }

/* ===== Bottom nav (mobile) ===== */
.bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bg-sidebar); border-top: 1px solid var(--border);
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 90;
}
.bottom-nav-item {
  flex: 1; display: flex; flex-direction: column; align-items: center;
  gap: 3px; padding: 4px; color: var(--text-muted); font-size: 0.65rem;
  font-weight: 500; text-decoration: none; transition: color 0.15s;
}
.bottom-nav-item svg { width: 22px; height: 22px; }
.bottom-nav-item.active, .bottom-nav-item:hover { color: var(--accent); }
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 99; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    z-index: 101;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.open { display: block; }
  .main-wrapper { margin-left: 0; }
  .hamburger { display: flex; }
  .bottom-nav { display: flex; }
  .main-content { padding: 20px 16px 90px; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .card-value { font-size: 1.5rem; }
}

/* ===== Bootstrap Dropdown Dark Mode Override ===== */
.dropdown-menu {
  background: var(--bg-card) !important;
  border-color: var(--border) !important;
  box-shadow: var(--shadow-lg);
}
.dropdown-item {
  color: var(--text-primary) !important;
  font-family: 'Inter', system-ui, sans-serif;
}
.dropdown-item:hover, .dropdown-item:focus {
  background: var(--bg-hover) !important;
  color: var(--text-primary) !important;
}
.dropdown-item small {
  color: var(--text-muted) !important;
}
.dropdown-divider { border-color: var(--border) !important; }

/* ===== Timer pulse animation ===== */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}