/**
 * Button Component Styles
 * Modern button system for CFB Stock Exchange
 */

/* ===== BASE BUTTON STYLES ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 145, 30, 0.2);
}

/* ===== PRIMARY BUTTON ===== */

.btn-primary {
  background: var(--primary-accent);
  color: white;
  border-color: var(--primary-accent);
}

.btn-primary:hover {
  background: var(--primary-accent-hover);
  border-color: var(--primary-accent-hover);
  color: white;
  box-shadow: var(--glow-primary);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

/* ===== SECONDARY BUTTON ===== */

.btn-secondary {
  background: var(--secondary-dark);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: var(--secondary-darker);
  border-color: rgba(255, 255, 255, 0.3);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* ===== SUCCESS BUTTON (BUY) ===== */

.btn-success,
.btn-buy {
  background: var(--success-green);
  color: white;
  border-color: var(--success-green);
}

.btn-success:hover,
.btn-buy:hover {
  background: #00b872;
  border-color: #00b872;
  color: white;
  box-shadow: var(--glow-success);
  transform: translateY(-1px);
}

/* ===== DANGER BUTTON (SELL) ===== */

.btn-danger,
.btn-sell {
  background: transparent;
  color: var(--danger-red);
  border-color: var(--danger-red);
}

.btn-danger:hover,
.btn-sell:hover {
  background: var(--danger-red);
  border-color: var(--danger-red);
  color: white;
  box-shadow: var(--glow-danger);
  transform: translateY(-1px);
}

/* ===== OUTLINE VARIANTS ===== */

.btn-outline-primary {
  background: transparent;
  color: var(--primary-accent);
  border-color: var(--primary-accent);
}

.btn-outline-primary:hover {
  background: var(--primary-accent);
  color: white;
}

.btn-outline-secondary {
  background: transparent;
  color: var(--text-secondary);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline-secondary:hover {
  background: var(--secondary-dark);
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.3);
}

/* ===== DARK BUTTON ===== */

.btn-dark {
  background: var(--primary-darker);
  color: var(--text-primary);
  border-color: var(--primary-darker);
}

.btn-dark:hover {
  background: var(--secondary-darker);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.btn-outline-dark {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--primary-darker);
}

.btn-outline-dark:hover {
  background: var(--primary-darker);
  color: var(--text-primary);
}

/* ===== ICON BUTTONS ===== */

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.btn-icon svg {
  width: 16px;
  height: 16px;
}

.btn-icon.btn-sm {
  width: 28px;
  height: 28px;
}

.btn-icon.btn-sm svg {
  width: 14px;
  height: 14px;
}

.btn-icon.btn-lg {
  width: 44px;
  height: 44px;
}

.btn-icon.btn-lg svg {
  width: 20px;
  height: 20px;
}

/* Icon button variants */
.btn-icon.btn-buy {
  background: var(--success-green);
  color: white;
  border-color: var(--success-green);
}

.btn-icon.btn-sell {
  background: transparent;
  color: var(--danger-red);
  border-color: var(--danger-red);
}

.btn-icon.btn-sell:hover:not(:disabled) {
  background: var(--danger-red);
  color: white;
}

.btn-icon.btn-sell:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  border-color: var(--text-secondary);
  color: var(--text-secondary);
}

/* ===== BUTTON SIZES ===== */

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* ===== BUTTON GROUPS ===== */

.btn-group {
  display: inline-flex;
  gap: var(--space-2);
}

.btn-group .btn {
  margin: 0;
}

.btn-group-vertical {
  display: inline-flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* ===== TOGGLE BUTTONS ===== */

.btn-check {
  position: absolute;
  clip: rect(0, 0, 0, 0);
  pointer-events: none;
}

.btn-check:checked + .btn {
  background: var(--primary-accent);
  border-color: var(--primary-accent);
  color: white;
}

.btn-check:checked + .btn-success,
.btn-check:checked + .btn-buy {
  background: var(--success-green);
  border-color: var(--success-green);
}

.btn-check:checked + .btn-danger,
.btn-check:checked + .btn-sell {
  background: var(--danger-red);
  border-color: var(--danger-red);
  color: white;
}

/* ===== LOADING STATE ===== */

.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-loading-spinner 0.6s linear infinite;
}

@keyframes button-loading-spinner {
  from {
    transform: rotate(0turn);
  }
  to {
    transform: rotate(1turn);
  }
}

/* ===== BUTTON WITH ICON ===== */

.btn-with-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.btn-with-icon svg {
  width: 18px;
  height: 18px;
}

/* ===== CLOSE BUTTON ===== */

.btn-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: var(--text-3xl);
  line-height: 1;
  cursor: pointer;
  padding: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  opacity: 0.7;
}

.btn-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  opacity: 1;
}

/* ===== RESPONSIVE ===== */

@media (max-width: 768px) {
  .btn {
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-sm);
  }
  
  .btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
  }
  
  .btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
}