/**
 * NexTrade — Component Library (Institutional Matte)
 * * SAFETY CHECK: Covers all existing classes (Buttons, Cards, Inputs, Badges, etc.)
 * * UPGRADE: Adds GPU acceleration, tabular numbers, and "Glass" borders.
 * * SYSTEM: Strictly uses variables from core.css.
 */

/* ============================================
   1. BUTTONS (Tactile & Premium)
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-4); /* Horizontal padding */
  height: 44px; /* Fixed height for touch consistency */
  
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  
  border: 1px solid transparent;
  border-radius: var(--radius-base); /* Moving towards rounding */
  cursor: pointer;
  
  /* The "Tactile" Feel */
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  user-select: none;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
}

/* Primary: Electric Blue with Glass Top Highlight */
.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
  /* Subtle top inner light for 3D effect */
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.15), var(--shadow-sm);
}
/* ── Button hover states — fine-pointer / real-hover devices only ────────── */
@media (hover: hover) {
  .btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
  }
  .btn-secondary:hover {
    background-color: var(--color-border-hover);
    border-color: var(--color-text-tertiary);
  }
  .btn-ghost:hover {
    background-color: var(--color-surface-elevated);
    color: var(--color-text-primary);
  }
  .btn-danger:hover {
    background-color: var(--color-danger);
    color: #fff;
  }
  .btn-success:hover {
    background-color: var(--color-success);
    color: #fff;
  }
  .card-hover:hover {
    border-color: var(--color-border-hover);
    background-color: var(--color-surface-elevated);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
  }
  .tab:hover { color: var(--color-text-primary); }
}
.btn-primary:active {
  background-color: var(--color-primary-active);
  transform: translateY(0);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1); /* Depressed look */
}
.btn-primary:disabled {
  background-color: var(--color-surface-elevated);
  color: var(--color-text-disabled);
  box-shadow: none;
  cursor: not-allowed;
}

/* Secondary: Surface with Border */
.btn-secondary {
  background-color: var(--color-surface-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}
.btn-secondary:active {
  background-color: var(--color-surface);
  transform: translateY(0);
}

/* Ghost: Transparent until hovered */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}
/* Semantic Buttons */
.btn-danger {
  background-color: rgba(239, 68, 68, 0.1);
  color: var(--color-danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-success {
  background-color: rgba(16, 185, 129, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Sizes */
.btn-sm {
  height: 40px;
  padding: 0 var(--space-3);
  font-size: var(--text-xs);
  border-radius: var(--radius-sm);
}

.btn-lg {
  height: 56px;
  padding: 0 var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn-full {
  width: 100%;
  display: flex;
}

.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: 50%; /* Circle */
}

/* ============================================
   2. CARDS (Surfaces & Depth)
   ============================================ */

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  position: relative;
  box-shadow: var(--shadow-highlight);
  /* Optimization */
  contain: content; 
}

/* Interactive Card */
.card-hover {
  cursor: pointer;
  transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}
.card-hover:active {
  transform: translateY(0);
  background-color: var(--color-surface-elevated);
}

.card-elevated {
  background-color: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
}

/* Card Anatomy */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}
.card-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
}
.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: 2px;
}
.card-body {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}
.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* HERO CARD (The Wallet Gradient) */
.hero-card {
  /* Sophisticated Mesh Gradient instead of Linear */
  background: 
    radial-gradient(circle at 100% 0%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
    linear-gradient(180deg, rgba(30, 58, 138, 0.4) 0%, rgba(11, 14, 17, 1) 100%);
  
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-8) var(--space-6);
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* ============================================
   3. INPUTS (Sunken Fields)
   ============================================ */

.input-group {
  position: relative;
  margin-bottom: var(--space-5);
}

.input-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: var(--weight-bold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.input-field {
  width: 100%;
  height: 48px;
  padding: 0 var(--space-4);
  
  font-family: var(--font-ui);
  font-size: var(--text-base); /* Prevents iOS zoom */
  color: var(--color-text-primary);
  
  background-color: var(--color-surface-sunken);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: all var(--transition-fast);
}

.input-field:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.20);
}
.input-field:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: var(--color-surface);
}
.input-field.error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 1px var(--color-danger);
}
.input-error-message {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-danger);
}

/* Input Icons */
.input-icon {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
  display: flex;
  align-items: center;
}
.input-icon-left { padding-left: 44px; }
.input-icon-right { padding-right: 44px; }
.input-icon-left-pos { left: var(--space-3); }
.input-icon-right-pos { right: var(--space-3); }

/* ============================================
   4. BADGES (Status Indicators)
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  
  font-size: 11px;
  font-weight: var(--weight-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  line-height: 1.4;
  
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.badge-success { background: var(--color-success-bg); color: var(--color-success); }
.badge-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.badge-danger  { background: var(--color-danger-bg);  color: var(--color-danger); }
.badge-neutral { 
  background: var(--color-surface-elevated); 
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

/* Risk Badges */
.badge-risk-low    { color: var(--color-success); background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-risk-medium { color: var(--color-warning); background: rgba(245, 158, 11, 0.1); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-risk-high   { color: var(--color-danger);  background: rgba(239, 68, 68, 0.1);  border: 1px solid rgba(239, 68, 68, 0.2); }

/* ============================================
   5. TABS & DIVIDERS
   ============================================ */

.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-6) 0;
}
.divider-text {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin: var(--space-6) 0;
  color: var(--color-text-tertiary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.divider-text::before, .divider-text::after {
  content: ''; flex: 1; height: 1px; background: var(--color-border);
}

.tabs {
  display: flex;
  gap: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
  overflow-x: auto; /* Scroll on mobile */
  scrollbar-width: none;
}
.tab {
  padding: var(--space-3) 0;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* ============================================
   6. ALERTS & PROGRESS
   ============================================ */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-base);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
}
.alert-success { border-color: rgba(16, 185, 129, 0.3); background: var(--color-success-bg); color: #86efac; }
.alert-warning { border-color: rgba(245, 158, 11, 0.3); background: var(--color-warning-bg); color: #fcd34d; }
.alert-danger  { border-color: rgba(239, 68, 68, 0.3);  background: var(--color-danger-bg);  color: #fca5a5; }

.progress {
  width: 100%;
  height: 6px;
  background-color: var(--color-surface-sunken);
  border-radius: var(--radius-pill);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-pill);
  transition: width var(--transition-base);
}
.progress-bar-success { background-color: var(--color-success); }
.progress-bar-warning { background-color: var(--color-warning); }
.progress-bar-danger  { background-color: var(--color-danger); }

/* ============================================
   7. SKELETON (Loading)
   ============================================ */

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-surface-elevated) 25%,
    var(--color-border) 50%,
    var(--color-surface-elevated) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite linear;
  border-radius: var(--radius-sm);
  opacity: 0.7;
}
.skeleton-text { height: 12px; margin-bottom: var(--space-2); width: 100%; }
.skeleton-title { height: 20px; width: 60%; margin-bottom: var(--space-4); }
.skeleton-card { height: 140px; width: 100%; border-radius: var(--radius-lg); }

/* ============================================
   8. MISC (Avatar, Tooltip, Empty, Stats)
   ============================================ */

/* Avatars */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-weight: var(--weight-semibold);
  overflow: hidden;
}
.avatar-sm { width: 32px; height: 32px; font-size: var(--text-xs); }
.avatar-lg { width: 64px; height: 64px; font-size: var(--text-lg); }
.avatar img { width: 100%; height: 100%; object-fit: cover; }

/* Tooltip */
.tooltip { position: relative; display: inline-block; }
.tooltip-text {
  visibility: hidden; opacity: 0;
  position: absolute; bottom: 130%; left: 50%;
  transform: translateX(-50%);
  background-color: #000;
  color: #fff;
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  transition: all 0.2s;
  pointer-events: none;
  z-index: 100;
}
.tooltip:hover .tooltip-text { visibility: visible; opacity: 1; bottom: 115%; }

/* Empty State */
.empty-state {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: var(--space-12) var(--space-4);
  text-align: center;
}
.empty-state-icon {
  width: 64px; height: 64px; margin-bottom: var(--space-4);
  color: var(--color-text-tertiary); opacity: 0.5;
}
.empty-state-title { font-size: var(--text-lg); font-weight: var(--weight-semibold); color: var(--color-text-primary); }
.empty-state-description { color: var(--color-text-secondary); max-width: 320px; font-size: var(--text-sm); }

/* Stat Card (Finance) */
.stat-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-highlight);
}
.stat-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}
.stat-value {
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}
.stat-change {
  display: inline-flex; align-items: center; gap: 4px;
  margin-top: var(--space-2);
  font-family: var(--font-mono); font-size: var(--text-xs);
}
.stat-change-positive { color: var(--color-success); }
.stat-change-negative { color: var(--color-danger); }