/* Button Design System v2 - Consistent Outline-First Approach */
/* Primary actions use solid, secondary actions use outline */

:root {
  /* Button Colors */
  --btn-primary-bg: #871a67;
  --btn-primary-hover: #6d1553;
  --btn-primary-active: #5a1245;
  
  --btn-success-bg: #28a745;
  --btn-success-hover: #218838;
  --btn-success-active: #1e7e34;
  
  --btn-info-bg: #17a2b8;
  --btn-info-hover: #138496;
  --btn-info-active: #117a8b;
  
  --btn-warning-bg: #ffc107;
  --btn-warning-hover: #e0a800;
  --btn-warning-active: #d39e00;
  --btn-warning-text: #212529;
  
  --btn-danger-bg: #dc3545;
  --btn-danger-hover: #c82333;
  --btn-danger-active: #bd2130;
  
  --btn-secondary-bg: #6c757d;
  --btn-secondary-hover: #5a6268;
  --btn-secondary-active: #545b62;
}

/* Dark mode color adjustments */
html.dark-mode {
  --btn-warning-bg: #f59e0b;
  --btn-warning-hover: #d97706;
  --btn-warning-active: #b45309;
  --btn-warning-text: #ffffff;
}

/* Base button styles */
.btn {
  /* Reset and base styles */
  appearance: none;
  border: none;
  background: none;
  font-family: inherit;
  
  /* Sizing */
  min-height: 44px;
  min-width: 44px;
  padding: 10px 20px;
  
  /* Typography */
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  text-decoration: none !important;
  white-space: nowrap;
  
  /* Layout */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  
  /* Visual */
  border-radius: 6px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  
  /* Transitions */
  transition: all 0.2s ease-in-out;
  
  /* Prevent text selection */
  user-select: none;
}

/* Ensure no underline on any state */
.btn:hover,
.btn:focus,
.btn:active,
.btn:visited {
  text-decoration: none !important;
}

/* Also apply to anchor buttons */
a.btn,
a.btn:hover,
a.btn:focus,
a.btn:active,
a.btn:visited {
  text-decoration: none !important;
}

/* Focus states for accessibility */
.btn:focus {
  outline: none;
}

.btn:focus-visible {
  outline: 3px solid var(--btn-primary-bg);
  outline-offset: 2px;
}

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

/* Hover animation */
.btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

/* =================================
   OUTLINE BUTTONS (Default Style)
   ================================= */

/* Primary Outline (Most common action buttons) */
.btn-outline-primary {
  background-color: transparent;
  color: var(--btn-primary-bg);
  border: 2px solid var(--btn-primary-bg);
}

.btn-outline-primary:hover:not(:disabled) {
  background-color: var(--btn-primary-bg);
  color: white;
  border-color: var(--btn-primary-bg);
}

/* Success Outline */
.btn-outline-success {
  background-color: transparent;
  color: var(--btn-success-bg);
  border: 2px solid var(--btn-success-bg);
}

.btn-outline-success:hover:not(:disabled) {
  background-color: var(--btn-success-bg);
  color: white;
  border-color: var(--btn-success-bg);
}

/* Info Outline */
.btn-outline-info {
  background-color: transparent;
  color: var(--btn-info-bg);
  border: 2px solid var(--btn-info-bg);
}

.btn-outline-info:hover:not(:disabled) {
  background-color: var(--btn-info-bg);
  color: white;
  border-color: var(--btn-info-bg);
}

/* Warning Outline */
.btn-outline-warning {
  background-color: transparent;
  color: var(--btn-warning-bg);
  border: 2px solid var(--btn-warning-bg);
}

.btn-outline-warning:hover:not(:disabled) {
  background-color: var(--btn-warning-bg);
  color: var(--btn-warning-text);
  border-color: var(--btn-warning-bg);
}

/* Danger Outline */
.btn-outline-danger {
  background-color: transparent;
  color: var(--btn-danger-bg);
  border: 2px solid var(--btn-danger-bg);
}

.btn-outline-danger:hover:not(:disabled) {
  background-color: var(--btn-danger-bg);
  color: white;
  border-color: var(--btn-danger-bg);
}

/* Secondary Outline */
.btn-outline-secondary {
  background-color: transparent;
  color: var(--btn-secondary-bg);
  border: 2px solid var(--btn-secondary-bg);
}

.btn-outline-secondary:hover:not(:disabled) {
  background-color: var(--btn-secondary-bg);
  color: white;
  border-color: var(--btn-secondary-bg);
}

/* =================================
   SOLID BUTTONS (Primary Actions)
   ================================= */

/* Primary Solid - Main CTA buttons */
.btn-primary {
  background-color: var(--btn-primary-bg);
  color: white;
  border: 2px solid var(--btn-primary-bg);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--btn-primary-hover);
  border-color: var(--btn-primary-hover);
}

/* Success Solid - Confirmations */
.btn-success {
  background-color: var(--btn-success-bg);
  color: white;
  border: 2px solid var(--btn-success-bg);
}

.btn-success:hover:not(:disabled) {
  background-color: var(--btn-success-hover);
  border-color: var(--btn-success-hover);
}

/* Danger Solid - Destructive actions */
.btn-danger {
  background-color: var(--btn-danger-bg);
  color: white;
  border: 2px solid var(--btn-danger-bg);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--btn-danger-hover);
  border-color: var(--btn-danger-hover);
}

/* Secondary Solid - Cancel/Close */
.btn-secondary {
  background-color: var(--btn-secondary-bg);
  color: white;
  border: 2px solid var(--btn-secondary-bg);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--btn-secondary-hover);
  border-color: var(--btn-secondary-hover);
}

/* Info Solid - Information actions */
.btn-info {
  background-color: var(--btn-info-bg);
  color: white;
  border: 2px solid var(--btn-info-bg);
}

.btn-info:hover:not(:disabled) {
  background-color: var(--btn-info-hover);
  border-color: var(--btn-info-hover);
}

/* Warning Solid - Caution actions */
.btn-warning {
  background-color: var(--btn-warning-bg);
  color: var(--btn-warning-text);
  border: 2px solid var(--btn-warning-bg);
}

.btn-warning:hover:not(:disabled) {
  background-color: var(--btn-warning-hover);
  border-color: var(--btn-warning-hover);
  color: var(--btn-warning-text);
}

/* =================================
   DARK MODE ADJUSTMENTS
   ================================= */

/* Outline buttons in dark mode */
html.dark-mode .btn-outline-primary {
  color: #c084fc;
  border-color: #c084fc;
}

html.dark-mode .btn-outline-primary:hover:not(:disabled) {
  background-color: var(--btn-primary-bg);
  color: white;
  border-color: var(--btn-primary-bg);
}

html.dark-mode .btn-outline-success {
  color: #4ade80;
  border-color: #4ade80;
}

html.dark-mode .btn-outline-success:hover:not(:disabled) {
  background-color: var(--btn-success-bg);
  color: white;
  border-color: var(--btn-success-bg);
}

html.dark-mode .btn-outline-info {
  color: #22d3ee;
  border-color: #22d3ee;
}

html.dark-mode .btn-outline-info:hover:not(:disabled) {
  background-color: var(--btn-info-bg);
  color: white;
  border-color: var(--btn-info-bg);
}

html.dark-mode .btn-outline-warning {
  color: #fbbf24;
  border-color: #fbbf24;
}

html.dark-mode .btn-outline-warning:hover:not(:disabled) {
  background-color: var(--btn-warning-bg);
  color: white;
  border-color: var(--btn-warning-bg);
}

html.dark-mode .btn-outline-danger {
  color: #f87171;
  border-color: #f87171;
}

html.dark-mode .btn-outline-danger:hover:not(:disabled) {
  background-color: var(--btn-danger-bg);
  color: white;
  border-color: var(--btn-danger-bg);
}

html.dark-mode .btn-outline-secondary {
  color: #9ca3af;
  border-color: #9ca3af;
}

html.dark-mode .btn-outline-secondary:hover:not(:disabled) {
  background-color: var(--btn-secondary-bg);
  color: white;
  border-color: var(--btn-secondary-bg);
}

/* =================================
   SIZE VARIANTS
   ================================= */

.btn-sm {
  min-height: 36px;
  min-width: 36px;
  padding: 6px 12px;
  font-size: 14px;
}

.btn-lg {
  min-height: 52px;
  padding: 14px 28px;
  font-size: 18px;
}

/* Icon-only buttons */
.btn-icon {
  padding: 0;
  width: 44px;
  height: 44px;
}

.btn-icon.btn-sm {
  width: 36px;
  height: 36px;
}

.btn-icon.btn-lg {
  width: 52px;
  height: 52px;
}

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

.btn-group {
  display: inline-flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.btn-group-vertical {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Connected button group (no gap) */
.btn-group-connected {
  gap: 0;
}

.btn-group-connected .btn:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  margin-left: -2px;
}

.btn-group-connected .btn:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

/* =================================
   SPECIAL BUTTONS
   ================================= */

/* Block button */
.btn-block {
  display: flex;
  width: 100%;
}

/* Loading state */
.btn.loading {
  color: transparent;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  top: 50%;
  left: 50%;
  margin-left: -10px;
  margin-top: -10px;
  border: 2px solid currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: btn-spinner 0.8s linear infinite;
}

@keyframes btn-spinner {
  to { transform: rotate(360deg); }
}

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

@media (max-width: 768px) {
  .btn {
    min-height: 48px;
    padding: 12px 20px;
    font-size: 16px; /* Prevents zoom on iOS */
  }
  
  .btn-mobile-block {
    width: 100%;
    display: flex;
  }
  
  .btn-group {
    width: 100%;
  }
  
  .btn-group .btn {
    flex: 1;
    min-width: 0;
  }
}

/* =================================
   HIGH CONTRAST MODE
   ================================= */

@media (prefers-contrast: high) {
  .btn {
    border-width: 3px;
  }
  
  .btn:focus-visible {
    outline-width: 4px;
  }
}

/* =================================
   REDUCED MOTION
   ================================= */

@media (prefers-reduced-motion: reduce) {
  .btn {
    transition: none;
  }
  
  .btn.loading::after {
    animation: none;
  }
}