:root {
  --bg-color: #0B0E14;
  --panel-bg: rgba(20, 24, 34, 0.6);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text-primary: #F8F9FA;
  --text-secondary: #A0AAB2;
  --primary-color: #3B82F6;
  --primary-hover: #2563EB;
  --accent-color: #8B5CF6;
  --success-color: #10B981;
  --warning-color: #F59E0B;
  --danger-color: #EF4444;
  --card-bg: rgba(30, 35, 48, 0.5);
  --card-hover: rgba(40, 48, 66, 0.8);
  --card-selected: rgba(59, 130, 246, 0.15);
  --card-selected-border: rgba(59, 130, 246, 0.5);
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: hidden;
  position: relative;
  padding: 2rem 0;
}

/* Background Effects */
.background-effects {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.4;
}

.glow-1 {
  top: -10%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
}

.glow-2 {
  bottom: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, var(--accent-color) 0%, transparent 70%);
}

.app-container {
  width: 100%;
  max-width: 800px;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

/* Screens */
.screen {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.screen.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
  animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Glass Panels */
.glass-panel {
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  padding: 2.25rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.text-center {
  text-align: center;
}

/* Typography */
h1 {
  font-size: 2.125rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #FFFFFF 0%, #A0AAB2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.subtitle {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 1rem;
  font-weight: 500;
}

.description {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: rgba(59, 130, 246, 0.2);
  color: #60A5FA;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: white;
  box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

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

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.15);
}

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

.btn-text {
  background: transparent;
  color: var(--text-secondary);
}

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

.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

.btn-group {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

/* Assessment Layout */
.assessment-header {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--panel-border);
  padding-bottom: 1rem;
}

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

.header-title-row h2 {
  margin-bottom: 0;
}

.live-score-badge {
  background: rgba(59, 130, 246, 0.15);
  color: #60A5FA;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid rgba(59, 130, 246, 0.3);
  transition: all 0.3s ease;
}

.progress-container {
  margin-bottom: 1rem;
}

.progress-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.progress-bar-bg {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  width: 0%;
  transition: width 0.3s ease;
  border-radius: 3px;
}

.assessment-footer {
  margin-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--panel-border);
  padding-top: 1.25rem;
}

/* Questions */
.questions-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.question-block {
  animation: fadeIn 0.4s ease forwards;
}

.question-text {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.options-grid {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.option-card {
  background: var(--card-bg);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.option-card:hover {
  background: var(--card-hover);
  transform: translateY(-1px);
}

.option-card.selected {
  background: var(--card-selected);
  border-color: var(--card-selected-border);
  box-shadow: 0 0 0 1px var(--card-selected-border);
}

.radio-indicator {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 2px solid var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.option-card.selected .radio-indicator {
  border-color: var(--primary-color);
}

.radio-indicator::after {
  content: '';
  width: 10px;
  height: 10px;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.5);
  transition: all 0.2s ease;
}

.option-card.selected .radio-indicator::after {
  opacity: 1;
  transform: scale(1);
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.input-field {
  width: 100%;
  background: rgba(0, 0, 0, 0.2);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 1rem 1.25rem;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
}

.input-field:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Results Display */
.results-panel {
  padding: 4rem 3rem;
}

.score-ring {
  width: 120px;
  margin: 0 auto 1.5rem;
}

.circular-chart {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  max-height: 250px;
}

.circle-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.1);
  stroke-width: 2.5;
}

.circle {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
  transition: stroke-dasharray 1.5s ease-out;
}

.percentage {
  fill: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.4em;
  font-weight: 700;
  text-anchor: middle;
}

.maturity-badge {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: background 0.3s, color 0.3s;
}

.tier-ad_hoc_ai .circle { stroke: var(--danger-color); }
.tier-ad_hoc_ai .maturity-badge { background: rgba(239, 68, 68, 0.2); color: #FCA5A5; }

.tier-assisted_ai .circle { stroke: var(--warning-color); }
.tier-assisted_ai .maturity-badge { background: rgba(245, 158, 11, 0.2); color: #FCD34D; }

.tier-standardized_ai .circle { stroke: var(--primary-color); }
.tier-standardized_ai .maturity-badge { background: rgba(59, 130, 246, 0.2); color: #93C5FD; }

.tier-context_driven_ai .circle { stroke: var(--success-color); }
.tier-context_driven_ai .maturity-badge { background: rgba(16, 185, 129, 0.2); color: #6EE7B7; }

.results-body {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 16px;
  padding: 2rem;
  margin: 2rem 0;
  text-align: left;
}

.risks-list {
  list-style-type: none;
  margin-bottom: 2rem;
}

.risks-list li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.75rem;
  color: var(--text-secondary);
}

.risks-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.action-section {
  border-top: 1px solid var(--panel-border);
  padding-top: 1.5rem;
}

.recommendation {
  color: var(--text-primary);
  font-size: 1.125rem;
}

.recommendation strong {
  color: var(--accent-color);
}

@media (max-width: 640px) {
  .glass-panel {
    padding: 1.5rem 1.25rem;
  }
  h1 { font-size: 1.75rem; }
  .btn-group { flex-direction: column; }
}