/* ContextOS — Clean, Modern, Dead Simple */

:root {
  --bg: #0a0a0b;
  --bg-elevated: #141416;
  --bg-card: #1a1a1f;
  --bg-input: #222228;
  --border: #2a2a32;
  --border-focus: #6366f1;
  --text: #f0f0f5;
  --text-secondary: #9898a8;
  --text-muted: #5a5a6e;
  --accent: #6366f1;
  --accent-hover: #818cf8;
  --accent-glow: rgba(99, 102, 241, 0.15);
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: 0.2s ease;
  --max-width: 720px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

#app {
  min-height: 100vh;
}

/* ===== LOADING ===== */
.loading-screen {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== HEADER ===== */
.header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--accent);
}

.header-tag {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* ===== HOME PAGE ===== */
.hero {
  padding: 80px 0 40px;
  text-align: center;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 30%, var(--accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 48px;
  line-height: 1.6;
}

/* Domain cards */
.domains-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding-bottom: 80px;
}

.domain-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 16px;
  text-align: left;
}

.domain-card:hover {
  border-color: var(--accent);
  background: var(--bg-elevated);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.domain-number {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-variant-numeric: tabular-nums;
}

.domain-card:hover .domain-number {
  border-color: var(--accent);
  color: var(--accent);
}

.domain-arrow {
  color: var(--text-muted);
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-left: auto;
  transition: transform var(--transition);
}

.domain-card:hover .domain-arrow {
  color: var(--accent);
  transform: translateX(4px);
}

.domain-info h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.domain-info p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.domain-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== QUESTIONNAIRE ===== */
.questionnaire {
  padding: 40px 0 80px;
}

.progress-bar-container {
  margin-bottom: 40px;
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.progress-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.progress-bar {
  height: 4px;
  background: var(--bg-input);
  border-radius: 2px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.4s ease;
}

/* Question */
.question-container {
  animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.question-label {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.question-helper {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.5;
}

/* Input styles */
.input-text,
.input-textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--text);
  font-family: var(--font);
  transition: border-color var(--transition);
  outline: none;
}

.input-text:focus,
.input-textarea:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-text::placeholder,
.input-textarea::placeholder {
  color: var(--text-muted);
}

.input-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Select options */
.select-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.select-option {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.95rem;
  color: var(--text);
  text-align: left;
}

.select-option:hover {
  border-color: var(--accent);
  background: var(--bg-elevated);
}

.select-option.selected {
  border-color: var(--accent);
  background: var(--accent-glow);
}

/* Multi-select */
.multiselect-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.multiselect-option {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.875rem;
  color: var(--text);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 8px;
}

.multiselect-option:hover {
  border-color: var(--accent);
}

.multiselect-option.selected {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.multiselect-check {
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.multiselect-option.selected .multiselect-check {
  background: var(--accent);
  border-color: var(--accent);
}

.multiselect-option.selected .multiselect-check::after {
  content: '✓';
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
}

/* Action buttons */
.question-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  gap: 12px;
}

.btn {
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  font-family: var(--font);
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 12px 16px;
}

.btn-ghost:hover {
  color: var(--text-secondary);
}

/* ===== RESULT PAGE ===== */
.result-page {
  padding: 40px 0 80px;
}

.result-header {
  text-align: center;
  margin-bottom: 32px;
}

.result-header h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.result-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.quality-badge {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.02em;
}

/* Version toggle */
.version-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 16px;
  padding: 4px;
  background: var(--bg-card);
  border-radius: 8px;
  width: fit-content;
}

.version-btn {
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.version-btn.active {
  background: var(--accent);
  color: #fff;
}

.version-btn:hover:not(.active) {
  color: var(--text-primary);
}

.improvement-tag {
  padding: 4px 10px;
  background: rgba(76, 175, 80, 0.15);
  color: #66bb6a;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 12px;
  margin-left: 8px;
}

.ai-label {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.result-output {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.result-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.result-toolbar-left {
  display: flex;
  gap: 8px;
}

.format-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font);
  transition: all var(--transition);
}

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

.copy-btn {
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  background: var(--success);
  color: white;
  font-family: var(--font);
  transition: all var(--transition);
}

.copy-btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.copy-btn.copied {
  background: var(--accent);
}

.result-content {
  padding: 24px;
  font-size: 0.9rem;
  line-height: 1.7;
  white-space: pre-wrap;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  max-height: 600px;
  overflow-y: auto;
  color: var(--text-secondary);
}

.result-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== EMAIL GATE ===== */
.email-gate {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.gate-content {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

.gate-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.gate-subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.6;
  margin-bottom: 32px;
}

.gate-form {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.gate-form .input-text {
  flex: 1;
  text-align: left;
}

.gate-form .btn-primary {
  white-space: nowrap;
  padding: 12px 24px;
}

.gate-note {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 12px;
}

@media (max-width: 640px) {
  .gate-form {
    flex-direction: column;
  }

  .gate-form .btn-primary {
    width: 100%;
  }
}

/* ===== FOOTER ===== */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero .subtitle {
    font-size: 1rem;
  }

  .question-label {
    font-size: 1.25rem;
  }

  .multiselect-options {
    grid-template-columns: 1fr;
  }

  .result-actions {
    flex-direction: column;
  }

  .result-actions .btn {
    width: 100%;
    text-align: center;
  }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 24px;
  font-size: 0.9rem;
  color: var(--text);
  z-index: 1000;
  transition: transform 0.3s ease, opacity 0.3s ease;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  pointer-events: none;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}