/* ============================================
   ZIEN FIT — Reusable Components
   ============================================ */

/* ── MetricCard ── */
.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-visible);
  border-top: 2px solid var(--gold-primary);
  padding: 20px 24px;
  border-radius: 2px;
  transition: border-color var(--dur-fast) var(--ease-snap),
              box-shadow var(--dur-fast) var(--ease-snap),
              transform var(--dur-fast) var(--ease-snap);
}
.metric-card:hover {
  border-top-color: var(--gold-light);
  box-shadow: var(--shadow-gold);
  transform: translateY(-2px);
}
.metric-card .metric-label {
  font: 600 var(--text-label) var(--font-heading);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: var(--space-tight);
}
.metric-card .metric-value {
  font: 700 var(--text-data) var(--font-display);
  color: var(--text-primary);
  letter-spacing: var(--ls-display);
}
.metric-card .metric-unit {
  font: 400 var(--text-label) var(--font-body);
  color: var(--text-secondary);
  margin-left: 4px;
}
.metric-card .metric-delta {
  font: 500 var(--text-label) var(--font-mono);
  margin-top: var(--space-tight);
}
.metric-delta.positive { color: var(--signal-green); }
.metric-delta.negative { color: var(--signal-red); }

.metric-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-base);
  margin-bottom: var(--space-lg);
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--grad-gold);
  color: var(--bg-void);
  font: 700 13px var(--font-heading);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  border: none;
  border-radius: 2px;
  padding: 14px 32px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
  white-space: nowrap;
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.12);
  transform: translateX(-100%);
  transition: transform var(--dur-medium) var(--ease-snap);
}
.btn-primary:hover::after { transform: translateX(0); }
.btn-primary:hover { box-shadow: var(--shadow-gold); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--text-secondary);
  font: 600 13px var(--font-heading);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  border: 1px solid var(--border-visible);
  border-radius: 2px;
  padding: 12px 24px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-snap);
}
.btn-secondary:hover { border-color: var(--gold-primary); color: var(--gold-primary); background: var(--gold-ghost); }

.btn-sm { padding: 8px 16px; font-size: 12px; }

/* ── Progress Bar ── */
.progress-bar-track {
  background: var(--bg-elevated);
  border-radius: 2px;
  height: 6px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--gold-dark), var(--gold-primary));
  border-radius: 2px;
  transition: width var(--dur-slow) var(--ease-snap);
}

/* ── Card ── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: var(--space-md);
  transition: all var(--dur-fast) var(--ease-drift);
}
.card:hover {
  border-color: var(--border-gold);
  background: var(--bg-elevated);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card), var(--shadow-gold);
}
.card.no-hover:hover { transform: none; box-shadow: none; }

/* ── Section Header ── */
.section-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: var(--space-lg);
}
.section-header h2 {
  font: 700 var(--text-card-title) var(--font-display);
  letter-spacing: var(--ls-display);
  text-transform: uppercase;
  color: var(--text-primary);
  white-space: nowrap;
}
.section-header::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-gold) 0%, transparent 100%);
}

/* ── Tags / Chips ── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  font: 500 12px var(--font-heading);
  letter-spacing: var(--ls-label);
  text-transform: uppercase;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-visible);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-snap);
  user-select: none;
}
.tag:hover { border-color: var(--gold-primary); color: var(--gold-primary); }
.tag.selected { background: var(--gold-ghost); border-color: var(--gold-primary); color: var(--gold-primary); }

/* ── Form Input ── */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: var(--space-base); }
.form-label { font: 600 var(--text-label) var(--font-heading); letter-spacing: var(--ls-label); text-transform: uppercase; color: var(--text-secondary); }
.form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-visible);
  border-radius: 2px;
  color: var(--text-primary);
  font: 400 15px var(--font-body);
  transition: border-color var(--dur-fast) var(--ease-snap);
}
.form-input:focus { border-color: var(--gold-primary); box-shadow: 0 0 0 1px var(--gold-dark); }
.form-input::placeholder { color: var(--text-muted); }

/* ── Range Slider ── */
.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--bg-elevated);
  border-radius: 2px;
  outline: none;
  margin: 8px 0;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--gold-primary);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(201,168,76,0.4);
}

/* ── Bottom Sheet ── */
.bottom-sheet-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 900;
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur-medium);
}
.bottom-sheet-overlay.open { opacity: 1; pointer-events: auto; }
.bottom-sheet {
  position: fixed; bottom: 0; left: 0; right: 0;
  max-height: 80vh;
  background: var(--bg-surface);
  border-top-left-radius: 24px;
  border-top-right-radius: 24px;
  z-index: 901;
  transform: translateY(100%);
  transition: transform var(--dur-medium) var(--ease-snap);
  overflow-y: auto;
  padding: var(--space-base) var(--space-md) var(--space-xl);
}
.bottom-sheet.open { transform: translateY(0); }
.bottom-sheet-handle {
  width: 40px; height: 4px;
  background: var(--border-visible);
  border-radius: 2px;
  margin: 0 auto var(--space-base);
}

/* ── Side Panel (desktop) ── */
.side-panel {
  position: fixed; top: 0; right: 0;
  width: 380px; height: 100vh;
  background: var(--bg-surface);
  border-left: 1px solid var(--border-gold);
  z-index: 800;
  transform: translateX(100%);
  transition: transform var(--dur-medium) var(--ease-snap);
  overflow-y: auto;
  padding: var(--space-lg);
}
.side-panel.open { transform: translateX(0); }
.side-panel-close {
  position: absolute; top: 16px; right: 16px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: var(--text-secondary); cursor: pointer;
}
.side-panel-close:hover { color: var(--text-primary); }

/* ── Step Indicator ── */
.step-indicator { display: flex; align-items: center; gap: 8px; }
.step-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--border-visible);
  transition: background var(--dur-fast);
}
.step-dot.active { background: var(--gold-primary); box-shadow: 0 0 8px rgba(201,168,76,0.4); }
.step-dot.completed { background: var(--gold-dark); }

/* ── Selection Card ── */
.selection-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-visible);
  border-radius: 4px;
  padding: 16px 20px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-snap);
  display: flex; align-items: center; gap: 14px;
}
.selection-card:hover { border-color: var(--gold-primary); background: var(--bg-elevated); }
.selection-card.selected { border-color: var(--gold-primary); background: var(--gold-ghost); box-shadow: var(--shadow-gold); }
.selection-card .sel-icon { font-size: 24px; width: 40px; text-align: center; }
.selection-card .sel-title { font: 700 15px var(--font-heading); letter-spacing: var(--ls-label); text-transform: uppercase; color: var(--text-primary); }
.selection-card .sel-desc { font: 400 13px var(--font-body); color: var(--text-secondary); margin-top: 2px; }

/* ── Exercise Card ── */
.exercise-card {
  display: flex; align-items: center; gap: var(--space-base);
  padding: var(--space-sm) var(--space-base);
  border-bottom: 1px solid var(--divider);
}
.exercise-card:last-child { border-bottom: none; }
.exercise-num { font: 700 14px var(--font-mono); color: var(--gold-primary); width: 24px; }
.exercise-name { flex: 1; font: 500 14px var(--font-body); color: var(--text-primary); }
.exercise-detail { font: 400 13px var(--font-mono); color: var(--text-secondary); }

/* ── Badges ── */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; font: 600 11px var(--font-mono); letter-spacing: var(--ls-label); text-transform: uppercase; border-radius: 2px; }
.badge-warn { background: rgba(245,166,35,0.15); color: var(--signal-amber); border: 1px solid rgba(245,166,35,0.3); }
.badge-good { background: rgba(61,204,122,0.15); color: var(--signal-green); border: 1px solid rgba(61,204,122,0.3); }
.badge-danger { background: rgba(217,64,64,0.15); color: var(--signal-red); border: 1px solid rgba(217,64,64,0.3); }
.badge-info { background: rgba(0,217,255,0.1); color: var(--signal-cyan); border: 1px solid rgba(0,217,255,0.25); }

/* ── Tab Bar ── */
.tab-bar { display: flex; gap: 4px; background: var(--bg-surface); border: 1px solid var(--border-visible); border-radius: 2px; padding: 3px; margin-bottom: var(--space-lg); }
.tab-btn { flex: 1; padding: 10px 16px; font: 600 13px var(--font-heading); letter-spacing: var(--ls-label); text-transform: uppercase; color: var(--text-secondary); background: transparent; border-radius: 2px; cursor: pointer; transition: all var(--dur-fast); text-align: center; }
.tab-btn.active { background: var(--gold-ghost); color: var(--gold-primary); border: 1px solid var(--border-gold); }

/* ── FAB ── */
.fab {
  position: fixed; bottom: calc(var(--bottom-nav-height) + 20px); right: 20px;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--grad-gold); color: var(--bg-void); font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(201,168,76,0.4); cursor: pointer; z-index: 50;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
}
.fab:hover { transform: scale(1.08); box-shadow: 0 8px 32px rgba(201,168,76,0.6); }
@media (min-width: 1024px) { .fab { bottom: 32px; right: 32px; } }