/* ================================
   FUTURISTIC MINIMALIST DESIGN
   Agent Builder MVP - 2025
   ================================ */

:root {
  /* Dark Backgrounds - Subtle Layers */
  --bg-base: #0d0d12;
  --bg-surface: #16161d;
  --bg-elevated: #1e1e28;
  --bg-hover: #252532;

  /* Accent Colors - Muted & Sophisticated */
  --accent-primary: #8b7cff;
  --accent-secondary: #5eb0ef;
  --accent-success: #4ade80;
  --accent-danger: #f87171;

  /* Text Colors - Proper Contrast */
  --text-primary: #e0e0e5;
  --text-secondary: #9696a0;
  --text-tertiary: #62626c;
  --text-on-accent: #ffffff;

  /* Borders - Very Subtle */
  --border-subtle: rgba(150, 150, 160, 0.1);
  --border-medium: rgba(150, 150, 160, 0.15);
  --border-accent: rgba(139, 124, 255, 0.3);

  /* Spacing - Reasonable & Balanced */
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.5rem;    /* 24px */
  --space-6: 2rem;      /* 32px */
  --space-8: 3rem;      /* 48px */

  /* Typography Scale - Conservative */
  --text-xs: 0.75rem;    /* 12px */
  --text-sm: 0.875rem;   /* 14px */
  --text-base: 0.9375rem; /* 15px */
  --text-md: 1rem;       /* 16px */
  --text-lg: 1.125rem;   /* 18px */
  --text-xl: 1.375rem;   /* 22px */
  --text-2xl: 1.75rem;   /* 28px */

  /* Radius - Modern but Subtle */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Shadows - Very Subtle */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 8px 0 rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 4px 16px 0 rgba(0, 0, 0, 0.5);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  padding: var(--space-4);
  line-height: 1.6;
  font-size: var(--text-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
}

/* ================================
   HEADER - Compact & Clean
   ================================ */

header {
  background: var(--bg-surface);
  padding: var(--space-5) var(--space-5);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border: 1px solid var(--border-subtle);
  border-bottom: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

header > div:first-child {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

header h1 {
  color: var(--text-primary);
  font-size: var(--text-xl);
  font-weight: 600;
  letter-spacing: -0.02em;
}

header p {
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  font-weight: 400;
}

/* ================================
   MAIN CONTENT - Spacious
   ================================ */

main {
  background: var(--bg-surface);
  padding: var(--space-6);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  border: 1px solid var(--border-subtle);
  min-height: 400px;
}

/* ================================
   FORMS - Clean & Minimal
   ================================ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--text-primary);
  font-weight: 500;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  transition: all 0.2s ease;
  background: var(--bg-elevated);
  color: var(--text-primary);
  font-family: inherit;
  line-height: 1.5;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--border-accent);
  background: var(--bg-hover);
}

.form-group textarea {
  resize: vertical;
  min-height: 90px;
  line-height: 1.6;
}

.form-group small {
  display: block;
  margin-top: var(--space-2);
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  line-height: 1.4;
}

/* ================================
   BUTTONS - Refined & Minimal
   ================================ */

.btn-primary {
  background: var(--accent-primary);
  color: var(--text-on-accent);
  border: none;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  background: #9d8fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-medium);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-elevated);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}

.btn-danger {
  background: transparent;
  color: var(--accent-danger);
  border: 1px solid rgba(248, 113, 113, 0.2);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-danger:hover {
  background: rgba(248, 113, 113, 0.1);
  border-color: rgba(248, 113, 113, 0.4);
}

/* ================================
   PERSONALITY CONFIG
   ================================ */

.personality-config {
  margin: var(--space-5) 0;
  padding: var(--space-4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  transition: all 0.2s ease;
}

.personality-config:hover {
  border-color: var(--border-medium);
}

.personality-config summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2);
  user-select: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.personality-config summary:hover {
  color: var(--text-primary);
}

.personality-config[open] summary {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--border-subtle);
}

.slider-container {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.slider-container input[type="range"] {
  flex: 1;
  height: 4px;
  border-radius: 999px;
  background: var(--bg-hover);
  outline: none;
  -webkit-appearance: none;
}

.slider-container input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.slider-container input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: 0 0 0 4px rgba(139, 124, 255, 0.2);
}

.slider-container input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
  border: none;
}

.slider-label {
  min-width: 120px;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: var(--text-sm);
}

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

.loading {
  text-align: center;
  padding: var(--space-8);
  color: var(--text-tertiary);
}

.spinner {
  border: 2px solid var(--border-subtle);
  border-top: 2px solid var(--accent-primary);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  animation: spin 0.7s linear infinite;
  margin: 0 auto var(--space-4);
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ================================
   AGENTS LIST - Grid Layout
   ================================ */

.agents-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.agent-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: all 0.2s ease;
  background: var(--bg-elevated);
}

.agent-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.agent-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
  gap: var(--space-3);
}

.agent-header h3 {
  color: var(--text-primary);
  font-size: var(--text-md);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.badge {
  background: rgba(139, 124, 255, 0.15);
  color: var(--accent-primary);
  padding: var(--space-1) var(--space-3);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
  border: 1px solid rgba(139, 124, 255, 0.2);
}

.agent-description {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  line-height: 1.6;
  margin-bottom: var(--space-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.agent-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
}

.agent-date {
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  font-weight: 400;
}

.agent-actions {
  display: flex;
  gap: var(--space-2);
}

/* ================================
   THREADS LIST
   ================================ */

.threads-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.thread-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  transition: all 0.2s ease;
  background: var(--bg-elevated);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.thread-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-hover);
  transform: translateX(2px);
}

.thread-header {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.thread-header h3 {
  color: var(--text-primary);
  font-size: var(--text-md);
  font-weight: 500;
  letter-spacing: -0.01em;
}

.thread-date {
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  font-weight: 400;
}

/* ================================
   CHAT - Optimized Space
   ================================ */

.chat-container {
  display: flex;
  flex-direction: column;
  height: 550px;
  gap: var(--space-4);
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 999px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
  background: var(--border-accent);
}

.chat-message {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  max-width: 75%;
  animation: slideIn 0.2s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chat-message.user {
  background: var(--accent-primary);
  color: var(--text-on-accent);
  margin-left: auto;
  border-bottom-right-radius: var(--space-1);
}

.chat-message.assistant {
  background: var(--bg-hover);
  border: 1px solid var(--border-subtle);
  border-bottom-left-radius: var(--space-1);
  color: var(--text-primary);
}

.chat-message strong {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  opacity: 0.6;
}

.chat-message p {
  line-height: 1.6;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: var(--text-sm);
}

.chat-form {
  display: flex;
  gap: var(--space-3);
}

.chat-form input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  background: var(--bg-elevated);
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.chat-form input:focus {
  outline: none;
  border-color: var(--border-accent);
  background: var(--bg-hover);
}

.chat-form button {
  padding: var(--space-3) var(--space-5);
  white-space: nowrap;
}

/* ================================
   AI THINKING
   ================================ */

.ai-thinking {
  background: var(--bg-hover) !important;
  border: 1px solid var(--border-accent) !important;
}

.thinking-animation {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.dots {
  display: flex;
  gap: var(--space-1);
  align-items: center;
}

.dots span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-primary);
  animation: pulse 1.2s infinite ease-in-out;
}

.dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.dots span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes pulse {
  0%, 60%, 100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  30% {
    opacity: 1;
    transform: scale(1.1);
  }
}

.thinking-status {
  color: var(--text-secondary);
  font-weight: 500;
  margin: 0;
  font-size: var(--text-sm);
}

/* ================================
   MODAL
   ================================ */

.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(13, 13, 18, 0.8);
  backdrop-filter: blur(4px);
  justify-content: center;
  align-items: center;
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--bg-elevated);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  max-width: 450px;
  width: 90%;
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-content h2 {
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  font-size: var(--text-lg);
  font-weight: 600;
}

.modal-content p {
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: var(--text-sm);
}

.modal-content textarea {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-family: inherit;
  resize: vertical;
  margin: var(--space-4) 0;
  background: var(--bg-hover);
  color: var(--text-primary);
  transition: all 0.2s ease;
  line-height: 1.6;
}

.modal-content textarea:focus {
  outline: none;
  border-color: var(--border-accent);
}

.modal-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
  margin-top: var(--space-4);
}

/* ================================
   EMPTY STATE
   ================================ */

.empty-state {
  text-align: center;
  padding: var(--space-8);
}

.empty-state p {
  color: var(--text-tertiary);
  font-size: var(--text-base);
  margin-bottom: var(--space-5);
  line-height: 1.6;
}

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

@media (max-width: 768px) {
  body {
    padding: var(--space-3);
  }

  header {
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4);
  }

  main {
    padding: var(--space-4);
  }

  .agents-list {
    grid-template-columns: 1fr;
  }

  .chat-container {
    height: 450px;
  }

  .chat-message {
    max-width: 85%;
  }
}