/*
 * VibePostAI Core - Interactive Button Styles
 * Version: 1.2.0
 * 
 * Styling for like, follow, copy buttons and core interactions
 * Integrates with VibePostAI theme design system
 */

/* ====== CORE VARIABLES ====== */
:root {
  --vpa-core-primary: #3AA3FF;
  --vpa-core-primary-dark: #2563EB;
  --vpa-core-success: #10B981;
  --vpa-core-warning: #F59E0B;
  --vpa-core-error: #EF4444;
  --vpa-core-bg-dark: #0B0F14;
  --vpa-core-bg-lighter: #1A1F24;
  --vpa-core-text-main: #E5E7EB;
  --vpa-core-text-muted: #9CA3AF;
  --vpa-core-border: #374151;
  --vpa-core-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  --vpa-core-radius: 8px;
  --vpa-core-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ====== CORE BUTTON SYSTEM ====== */
.vpa-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--vpa-core-border);
  border-radius: var(--vpa-core-radius);
  background: var(--vpa-core-bg-lighter);
  color: var(--vpa-core-text-main);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--vpa-core-transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.vpa-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--vpa-core-shadow);
}

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

.vpa-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ====== BUTTON VARIANTS ====== */
.vpa-btn-like {
  border-color: #EC4899;
  color: #EC4899;
}

.vpa-btn-like:hover {
  background: #EC4899;
  color: white;
}

.vpa-btn-like.active {
  background: #EC4899;
  color: white;
  animation: vpa-like-pulse 0.3s ease;
}

.vpa-btn-follow {
  border-color: var(--vpa-core-primary);
  color: var(--vpa-core-primary);
}

.vpa-btn-follow:hover {
  background: var(--vpa-core-primary);
  color: white;
}

.vpa-btn-follow.active {
  background: var(--vpa-core-primary);
  color: white;
}

.vpa-btn-copy {
  border-color: var(--vpa-core-success);
  color: var(--vpa-core-success);
}

.vpa-btn-copy:hover {
  background: var(--vpa-core-success);
  color: white;
}

.vpa-btn-copy.copied {
  background: var(--vpa-core-success);
  color: white;
  animation: vpa-copy-success 0.6s ease;
}

/* ====== BUTTON SIZES ====== */
.vpa-btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.vpa-btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
}

/* ====== ICON BUTTONS ====== */
.vpa-btn-icon {
  padding: 0.5rem;
  min-width: 40px;
  justify-content: center;
}

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

/* ====== LOADING STATES ====== */
.vpa-btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

.vpa-btn.loading::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: vpa-spin 1s linear infinite;
}

.vpa-btn.loading .vpa-btn-text {
  opacity: 0;
}

/* ====== BUTTON ANIMATIONS ====== */
@keyframes vpa-like-pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

@keyframes vpa-copy-success {
  0% { transform: scale(1); }
  50% { 
    transform: scale(1.1);
    box-shadow: 0 0 0 8px rgba(16, 185, 129, 0.3);
  }
  100% { 
    transform: scale(1);
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

@keyframes vpa-spin {
  to { transform: rotate(360deg); }
}

/* ====== RIPPLE EFFECT ====== */
.vpa-btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.3s ease, height 0.3s ease;
}

.vpa-btn:active::after {
  width: 120px;
  height: 120px;
}

/* ====== BUTTON GROUPS ====== */
.vpa-btn-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.vpa-btn-group .vpa-btn {
  flex: 1;
}

.vpa-btn-toolbar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--vpa-core-bg-dark);
  border-radius: var(--vpa-core-radius);
  border: 1px solid var(--vpa-core-border);
}

/* ====== COUNT DISPLAYS ====== */
.vpa-count {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--vpa-core-text-muted);
  font-weight: 600;
}

.vpa-count-number {
  transition: var(--vpa-core-transition);
}

.vpa-count-number.updated {
  animation: vpa-count-update 0.5s ease;
}

@keyframes vpa-count-update {
  0% { transform: scale(1); }
  50% { 
    transform: scale(1.3);
    color: var(--vpa-core-primary);
  }
  100% { transform: scale(1); }
}

/* ====== INTERACTIVE ELEMENTS ====== */
.vpa-like-button {
  position: relative;
}

.vpa-like-button .vpa-heart {
  transition: var(--vpa-core-transition);
}

.vpa-like-button.active .vpa-heart {
  fill: #EC4899;
  animation: vpa-heart-beat 0.4s ease;
}

@keyframes vpa-heart-beat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.3); }
  50% { transform: scale(1.1); }
  75% { transform: scale(1.2); }
}

.vpa-follow-button .vpa-follow-icon {
  transition: var(--vpa-core-transition);
}

.vpa-follow-button.active .vpa-follow-icon {
  transform: scale(1.1);
}

/* ====== COPY FEEDBACK ====== */
.vpa-copy-feedback {
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.25rem 0.5rem;
  background: var(--vpa-core-success);
  color: white;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s ease;
  z-index: 1000;
}

.vpa-copy-feedback::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--vpa-core-success);
}

.vpa-copy-feedback.show {
  opacity: 1;
  transform: translateX(-50%) translateY(-5px);
}

/* ====== HOVER EFFECTS ====== */
.vpa-btn-like:hover .vpa-heart {
  fill: #EC4899;
  filter: drop-shadow(0 0 8px rgba(236, 72, 153, 0.5));
}

.vpa-btn-follow:hover .vpa-follow-icon {
  color: var(--vpa-core-primary);
  filter: drop-shadow(0 0 8px rgba(58, 163, 255, 0.5));
}

.vpa-btn-copy:hover .vpa-copy-icon {
  color: var(--vpa-core-success);
  filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.5));
}

/* ====== COMPACT MODE ====== */
.vpa-compact .vpa-btn {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.vpa-compact .vpa-btn-icon {
  padding: 0.375rem;
  min-width: 32px;
}

.vpa-compact .vpa-btn-icon .vpa-icon {
  width: 14px;
  height: 14px;
}

/* ====== DISABLED STATES ====== */
.vpa-btn:disabled,
.vpa-btn.disabled {
  background: var(--vpa-core-border);
  color: var(--vpa-core-text-muted);
  border-color: var(--vpa-core-border);
  cursor: not-allowed;
  opacity: 0.5;
}

.vpa-btn:disabled:hover,
.vpa-btn.disabled:hover {
  transform: none;
  box-shadow: none;
}

/* ====== ACCESSIBILITY ====== */
.vpa-btn:focus {
  outline: 2px solid var(--vpa-core-primary);
  outline-offset: 2px;
}

.vpa-btn:focus:not(:focus-visible) {
  outline: none;
}

/* ====== MOBILE OPTIMIZATIONS ====== */
@media (max-width: 768px) {
  .vpa-btn {
    min-height: 44px; /* Touch target size */
  }
  
  .vpa-btn-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .vpa-btn-toolbar {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
}

/* ====== HIGH CONTRAST MODE ====== */
@media (prefers-contrast: high) {
  .vpa-btn {
    border-width: 2px;
  }
  
  .vpa-btn:focus {
    outline-width: 3px;
  }
}

/* ====== REDUCED MOTION ====== */
@media (prefers-reduced-motion: reduce) {
  .vpa-btn,
  .vpa-count-number,
  .vpa-heart,
  .vpa-follow-icon {
    transition: none;
  }
  
  .vpa-btn:hover {
    transform: none;
  }
  
  .vpa-like-pulse,
  .vpa-copy-success,
  .vpa-heart-beat,
  .vpa-count-update {
    animation: none;
  }
}

/* ====== DARK MODE ENHANCEMENTS ====== */
@media (prefers-color-scheme: dark) {
  .vpa-btn {
    background: var(--vpa-core-bg-darker, #111827);
    border-color: var(--vpa-core-border, #374151);
  }
}

/* ====== BUTTON STATES FOR SPECIFIC ACTIONS ====== */
.vpa-btn-like.rate-limited,
.vpa-btn-follow.rate-limited,
.vpa-btn-copy.rate-limited {
  background: var(--vpa-core-warning);
  color: white;
  cursor: not-allowed;
  animation: vpa-rate-limit-pulse 2s infinite;
}

@keyframes vpa-rate-limit-pulse {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 1; }
}

/* ====== TOOLTIP INTEGRATION ====== */
.vpa-btn[data-tooltip] {
  position: relative;
}

.vpa-btn[data-tooltip]:hover::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--vpa-core-bg-dark);
  color: var(--vpa-core-text-main);
  padding: 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  white-space: nowrap;
  z-index: 1000;
  margin-bottom: 5px;
  border: 1px solid var(--vpa-core-border);
}

/* ====== PERFORMANCE OPTIMIZATIONS ====== */
.vpa-btn,
.vpa-count-number {
  will-change: transform;
}

.vpa-btn:not(:hover):not(:active) {
  will-change: auto;
}