/**
 * Agent-Like Loading States
 *
 * Distinctive loaders for AI agents that feel like intelligent assistants
 * actively working on your behalf. Each agent type has its own personality.
 */

/* ============================================
   CSS VARIABLES & BASE STYLES
   ============================================ */

:root {
  /* Agent Colors */
  --agent-writer-primary: #2563eb;
  --agent-writer-secondary: #3b82f6;
  --agent-writer-accent: #60a5fa;
  --agent-writer-glow: rgba(37, 99, 235, 0.3);

  --agent-coach-primary: #059669;
  --agent-coach-secondary: #10b981;
  --agent-coach-accent: #34d399;
  --agent-coach-glow: rgba(5, 150, 105, 0.3);

  /* Neutral palette */
  --agent-bg-dark: #0f172a;
  --agent-bg-medium: #1e293b;
  --agent-bg-light: #334155;
  --agent-text-primary: #f8fafc;
  --agent-text-secondary: #94a3b8;
  --agent-text-muted: #64748b;
}

/* ============================================
   AGENT LOADER CONTAINER
   ============================================ */

.agent-loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  padding: 2.5rem 2rem;
  background: linear-gradient(135deg, var(--agent-bg-dark) 0%, var(--agent-bg-medium) 100%);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Animated background pattern */
.agent-loader::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 80%, var(--agent-glow, var(--agent-writer-glow)) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, var(--agent-glow, var(--agent-writer-glow)) 0%, transparent 50%);
  opacity: 0.5;
  animation: agent-bg-pulse 4s ease-in-out infinite;
}

@keyframes agent-bg-pulse {
  0%, 100% { opacity: 0.3; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.05); }
}

/* Subtle grid pattern overlay */
.agent-loader::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* ============================================
   AGENT AVATAR / ICON AREA
   ============================================ */

.agent-avatar {
  position: relative;
  width: 80px;
  height: 80px;
  margin-bottom: 1.5rem;
  z-index: 1;
}

.agent-avatar-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 2px solid var(--agent-primary, var(--agent-writer-primary));
  opacity: 0.3;
  animation: agent-ring-pulse 2s ease-out infinite;
}

.agent-avatar-ring:nth-child(2) {
  animation-delay: 0.5s;
}

.agent-avatar-ring:nth-child(3) {
  animation-delay: 1s;
}

@keyframes agent-ring-pulse {
  0% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.4;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.8);
    opacity: 0;
  }
}

.agent-avatar-icon {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--agent-primary, var(--agent-writer-primary)), var(--agent-secondary, var(--agent-writer-secondary)));
  border-radius: 50%;
  box-shadow:
    0 4px 20px var(--agent-glow, var(--agent-writer-glow)),
    inset 0 1px 0 rgba(255,255,255,0.2);
}

.agent-avatar-icon svg {
  width: 36px;
  height: 36px;
  color: white;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

/* ============================================
   AGENT STATUS / THINKING INDICATOR
   ============================================ */

.agent-status {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  z-index: 1;
}

.agent-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--agent-text-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.agent-thinking-dots {
  display: flex;
  gap: 4px;
}

.agent-thinking-dots span {
  width: 6px;
  height: 6px;
  background: var(--agent-accent, var(--agent-writer-accent));
  border-radius: 50%;
  animation: agent-dot-bounce 1.4s ease-in-out infinite;
}

.agent-thinking-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.agent-thinking-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes agent-dot-bounce {
  0%, 80%, 100% {
    transform: scale(0.8);
    opacity: 0.5;
  }
  40% {
    transform: scale(1.2);
    opacity: 1;
  }
}

/* ============================================
   PROGRESS MESSAGE (ROTATING)
   ============================================ */

.agent-message-container {
  position: relative;
  min-height: 60px;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}

.agent-message {
  font-size: 1.125rem;
  color: var(--agent-text-primary);
  text-align: center;
  font-weight: 500;
  line-height: 1.5;
  max-width: 320px;
  opacity: 0;
  transform: translateY(10px);
  animation: agent-message-fade 0.5s ease forwards;
}

@keyframes agent-message-fade {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.agent-message.fade-out {
  animation: agent-message-fade-out 0.3s ease forwards;
}

@keyframes agent-message-fade-out {
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

.agent-submessage {
  font-size: 0.8125rem;
  color: var(--agent-text-muted);
  margin-top: 0.5rem;
  opacity: 0;
  animation: agent-message-fade 0.5s ease 0.2s forwards;
}

/* ============================================
   PROGRESS BAR (INDETERMINATE)
   ============================================ */

.agent-progress {
  width: 200px;
  height: 3px;
  background: var(--agent-bg-light);
  border-radius: 2px;
  margin-top: 1.5rem;
  overflow: hidden;
  z-index: 1;
}

.agent-progress-bar {
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--agent-primary, var(--agent-writer-primary)), var(--agent-accent, var(--agent-writer-accent)));
  border-radius: 2px;
  animation: agent-progress-slide 1.5s ease-in-out infinite;
}

@keyframes agent-progress-slide {
  0% { transform: translateX(-100%); }
  50% { transform: translateX(150%); }
  100% { transform: translateX(400%); }
}

/* ============================================
   RESUME WRITER AGENT SPECIFICS
   ============================================ */

.agent-loader--writer {
  --agent-primary: var(--agent-writer-primary);
  --agent-secondary: var(--agent-writer-secondary);
  --agent-accent: var(--agent-writer-accent);
  --agent-glow: var(--agent-writer-glow);
}

/* Writing animation - pen/cursor effect */
.agent-loader--writer .agent-avatar-icon::after {
  content: '';
  position: absolute;
  bottom: 8px;
  right: 8px;
  width: 8px;
  height: 8px;
  background: var(--agent-accent);
  border-radius: 50%;
  animation: agent-writer-cursor 0.8s ease-in-out infinite;
  box-shadow: 0 0 8px var(--agent-accent);
}

@keyframes agent-writer-cursor {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* Floating text lines animation */
.agent-writer-lines {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120%;
  height: 120%;
  pointer-events: none;
}

.agent-writer-line {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--agent-writer-accent), transparent);
  opacity: 0.3;
  animation: agent-writer-line-float 3s ease-in-out infinite;
}

.agent-writer-line:nth-child(1) { top: 20%; left: 10%; width: 30%; animation-delay: 0s; }
.agent-writer-line:nth-child(2) { top: 40%; left: 60%; width: 25%; animation-delay: 0.5s; }
.agent-writer-line:nth-child(3) { top: 60%; left: 20%; width: 35%; animation-delay: 1s; }
.agent-writer-line:nth-child(4) { top: 80%; left: 50%; width: 20%; animation-delay: 1.5s; }

@keyframes agent-writer-line-float {
  0%, 100% { opacity: 0.1; transform: scaleX(0.8); }
  50% { opacity: 0.4; transform: scaleX(1); }
}

/* ============================================
   CAREER COACH AGENT SPECIFICS
   ============================================ */

.agent-loader--coach {
  --agent-primary: var(--agent-coach-primary);
  --agent-secondary: var(--agent-coach-secondary);
  --agent-accent: var(--agent-coach-accent);
  --agent-glow: var(--agent-coach-glow);
}

/* Scanning/analysis effect */
.agent-loader--coach .agent-avatar-icon::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 100%;
  background: linear-gradient(180deg, transparent 0%, var(--agent-coach-accent) 50%, transparent 100%);
  opacity: 0.3;
  animation: agent-coach-scan 2s ease-in-out infinite;
}

@keyframes agent-coach-scan {
  0%, 100% { transform: translateY(-100%); }
  50% { transform: translateY(100%); }
}

/* Chart bars animation */
.agent-coach-bars {
  display: flex;
  gap: 3px;
  align-items: flex-end;
  height: 20px;
  position: absolute;
  bottom: -30px;
  left: 50%;
  transform: translateX(-50%);
}

.agent-coach-bar {
  width: 4px;
  background: var(--agent-coach-accent);
  border-radius: 2px;
  opacity: 0.6;
  animation: agent-coach-bar-grow 1.2s ease-in-out infinite;
}

.agent-coach-bar:nth-child(1) { height: 8px; animation-delay: 0s; }
.agent-coach-bar:nth-child(2) { height: 14px; animation-delay: 0.1s; }
.agent-coach-bar:nth-child(3) { height: 10px; animation-delay: 0.2s; }
.agent-coach-bar:nth-child(4) { height: 18px; animation-delay: 0.3s; }
.agent-coach-bar:nth-child(5) { height: 12px; animation-delay: 0.4s; }

@keyframes agent-coach-bar-grow {
  0%, 100% { transform: scaleY(0.6); opacity: 0.4; }
  50% { transform: scaleY(1); opacity: 0.8; }
}

/* ============================================
   GENERAL UTILITY CLASSES
   ============================================ */

/* Light theme variant */
.agent-loader--light {
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.agent-loader--light::after {
  background-image:
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
}

.agent-loader--light .agent-name {
  color: var(--agent-bg-dark);
}

.agent-loader--light .agent-message {
  color: var(--agent-bg-dark);
}

.agent-loader--light .agent-submessage {
  color: var(--agent-text-muted);
}

.agent-loader--light .agent-progress {
  background: #cbd5e1;
}

/* Compact variant for smaller containers */
.agent-loader--compact {
  min-height: 200px;
  padding: 1.5rem;
}

.agent-loader--compact .agent-avatar {
  width: 56px;
  height: 56px;
  margin-bottom: 1rem;
}

.agent-loader--compact .agent-avatar-icon svg {
  width: 24px;
  height: 24px;
}

.agent-loader--compact .agent-message {
  font-size: 0.9375rem;
}

.agent-loader--compact .agent-progress {
  width: 140px;
}

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

@media (max-width: 640px) {
  .agent-loader {
    min-height: 280px;
    padding: 1.5rem 1rem;
  }

  .agent-avatar {
    width: 64px;
    height: 64px;
  }

  .agent-avatar-icon svg {
    width: 28px;
    height: 28px;
  }

  .agent-message {
    font-size: 1rem;
    max-width: 280px;
  }

  .agent-progress {
    width: 160px;
  }
}