/* ═══════════════════════════════════════════════════════════════════
   NDDS Recommender — Premium Dark-Mode Pharmaceutical UI
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Google Fonts ─────────────────────────────────────────────── */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap");

/* ─── CSS Variables (Design Tokens) ────────────────────────────── */
:root {
  /* Background & Surface */
  --bg-primary: #06091a;
  --bg-secondary: #0c1029;
  --bg-surface: rgba(15, 20, 50, 0.7);
  --bg-surface-hover: rgba(20, 28, 65, 0.8);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --bg-glass-hover: rgba(255, 255, 255, 0.07);
  --bg-input: rgba(10, 15, 40, 0.8);

  /* Accent Colors */
  --accent-primary: #00d4aa;
  --accent-primary-rgb: 0, 212, 170;
  --accent-secondary: #7c3aed;
  --accent-secondary-rgb: 124, 58, 237;
  --accent-tertiary: #3b82f6;
  --accent-warn: #f59e0b;
  --accent-danger: #ef4444;

  /* Text */
  --text-primary: #f0f4ff;
  --text-secondary: #94a3c8;
  --text-muted: #5b6a8a;
  --text-accent: var(--accent-primary);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.1);
  --border-accent: rgba(0, 212, 170, 0.3);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 212, 170, 0.15);
  --shadow-glow-purple: 0 0 30px rgba(124, 58, 237, 0.15);

  /* Typography */
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-heading: "Outfit", "Inter", sans-serif;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ─── Reset & Base ─────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* ─── Animated Background ──────────────────────────────────────── */
.bg-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.bg-particles .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: orbFloat 20s ease-in-out infinite;
}

.bg-particles .orb:nth-child(1) {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(var(--accent-primary-rgb), 0.3), transparent);
  top: -10%;
  right: -5%;
  animation-duration: 25s;
}

.bg-particles .orb:nth-child(2) {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(var(--accent-secondary-rgb), 0.25), transparent);
  bottom: -10%;
  left: -5%;
  animation-duration: 30s;
  animation-delay: -5s;
}

.bg-particles .orb:nth-child(3) {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.2), transparent);
  top: 50%;
  left: 50%;
  animation-duration: 22s;
  animation-delay: -10s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(50px, -30px) scale(1.1); }
  50% { transform: translate(-20px, 40px) scale(0.95); }
  75% { transform: translate(30px, 20px) scale(1.05); }
}

/* ─── Floating Molecular Particles ─────────────────────────────── */
.particle {
  position: fixed;
  width: 4px;
  height: 4px;
  background: rgba(var(--accent-primary-rgb), 0.3);
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  animation: particleFloat linear infinite;
}

@keyframes particleFloat {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-10vh) rotate(720deg); opacity: 0; }
}

/* ─── Main Layout ──────────────────────────────────────────────── */
.app-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ─── Header ───────────────────────────────────────────────────── */
.app-header {
  padding: var(--space-lg) var(--space-xl);
  background: rgba(6, 9, 26, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.logo-section {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 0 20px rgba(var(--accent-primary-rgb), 0.3);
}

.logo-text h1 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.logo-text p {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.header-badge {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.header-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(var(--accent-primary-rgb), 0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 0 8px rgba(var(--accent-primary-rgb), 0); }
}

/* ─── Main Content ─────────────────────────────────────────────── */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl);
  width: 100%;
  flex: 1;
}

/* ─── Progress Stepper ─────────────────────────────────────────── */
.stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: var(--space-3xl);
  padding: 0 var(--space-xl);
}

.step-item {
  display: flex;
  align-items: center;
  gap: 0;
  cursor: pointer;
  transition: var(--transition-base);
}

.step-circle {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border: 2px solid var(--border-medium);
  background: var(--bg-surface);
  color: var(--text-muted);
  transition: var(--transition-slow);
  flex-shrink: 0;
  position: relative;
}

.step-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-left: var(--space-sm);
  white-space: nowrap;
  font-weight: 500;
  transition: var(--transition-base);
}

.step-connector {
  width: 60px;
  height: 2px;
  background: var(--border-medium);
  margin: 0 var(--space-sm);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.step-connector::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Step States */
.step-item.active .step-circle {
  border-color: var(--accent-primary);
  background: linear-gradient(135deg, rgba(var(--accent-primary-rgb), 0.2), rgba(var(--accent-secondary-rgb), 0.1));
  color: var(--accent-primary);
  box-shadow: 0 0 20px rgba(var(--accent-primary-rgb), 0.3);
}

.step-item.active .step-label {
  color: var(--text-primary);
}

.step-item.completed .step-circle {
  border-color: var(--accent-primary);
  background: var(--accent-primary);
  color: var(--bg-primary);
}

.step-item.completed .step-label {
  color: var(--accent-primary);
}

.step-item.completed + .step-connector::after,
.step-connector.filled::after {
  width: 100%;
}

/* ─── Form Cards (Glass panels) ────────────────────────────────── */
.form-panel {
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  animation: panelEnter 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-primary-rgb), 0.4), transparent);
}

@keyframes panelEnter {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}

.form-panel.hidden {
  display: none;
}

.panel-header {
  margin-bottom: var(--space-xl);
}

.panel-header h2 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.panel-header p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.panel-header .step-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
  display: block;
}

/* ─── Form Elements ────────────────────────────────────────────── */
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.form-label .required {
  color: var(--accent-primary);
  font-size: 0.7rem;
}

.form-label .info-icon {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid var(--text-muted);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--text-muted);
  cursor: help;
  transition: var(--transition-fast);
}

.form-label .info-icon:hover {
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* Select/Dropdown */
.form-select {
  appearance: none;
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition-base);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3c8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}

.form-select:hover {
  border-color: rgba(var(--accent-primary-rgb), 0.4);
}

.form-select:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.15);
}

/* Number Input */
.form-input {
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: var(--transition-base);
}

.form-input:hover {
  border-color: rgba(var(--accent-primary-rgb), 0.4);
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(var(--accent-primary-rgb), 0.15);
}

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

/* Range Slider */
.slider-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.slider-value {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-primary);
  min-height: 2rem;
}

.slider-value .unit {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(
    to right,
    var(--accent-primary) 0%,
    var(--accent-primary) var(--slider-percent, 50%),
    var(--border-medium) var(--slider-percent, 50%),
    var(--border-medium) 100%
  );
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 10px rgba(var(--accent-primary-rgb), 0.4);
  cursor: pointer;
  transition: var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 20px rgba(var(--accent-primary-rgb), 0.6);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-primary);
  border: 3px solid var(--bg-primary);
  box-shadow: 0 0 10px rgba(var(--accent-primary-rgb), 0.4);
  cursor: pointer;
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Toggle Switch */
.toggle-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.toggle-switch {
  position: relative;
  width: 52px;
  height: 28px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--border-medium);
  border-radius: 28px;
  transition: var(--transition-base);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 22px;
  height: 22px;
  left: 3px;
  bottom: 3px;
  background: var(--text-secondary);
  border-radius: 50%;
  transition: var(--transition-base);
}

.toggle-switch input:checked + .toggle-slider {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(24px);
  background: white;
}

.toggle-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.toggle-label.active {
  color: var(--accent-primary);
  font-weight: 500;
}

/* Checkbox Group (Multi-select pills) */
.checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.checkbox-pill {
  position: relative;
}

.checkbox-pill input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-pill label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-medium);
  border-radius: 100px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-base);
  user-select: none;
}

.checkbox-pill label:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(var(--accent-primary-rgb), 0.3);
  color: var(--text-primary);
}

.checkbox-pill input:checked + label {
  background: rgba(var(--accent-primary-rgb), 0.15);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
  box-shadow: 0 0 12px rgba(var(--accent-primary-rgb), 0.15);
}

.checkbox-pill input:checked + label .pill-check {
  opacity: 1;
}

.pill-check {
  opacity: 0;
  transition: var(--transition-fast);
  font-size: 0.7rem;
}

/* ─── Navigation Buttons ───────────────────────────────────────── */
.form-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-subtle);
}

.btn {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.8rem 2rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  transition: var(--transition-base);
  text-decoration: none;
  letter-spacing: 0.01em;
}

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

.btn-secondary:hover {
  background: var(--bg-glass-hover);
  border-color: rgba(var(--accent-primary-rgb), 0.3);
  color: var(--text-primary);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #00b894);
  color: var(--bg-primary);
  box-shadow: 0 4px 15px rgba(var(--accent-primary-rgb), 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(var(--accent-primary-rgb), 0.45);
}

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

.btn-analyze {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  padding: 1rem 2.5rem;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 20px rgba(var(--accent-primary-rgb), 0.35);
}

.btn-analyze:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 35px rgba(var(--accent-primary-rgb), 0.5);
}

.btn-reset {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

.btn-reset:hover {
  background: rgba(239, 68, 68, 0.2);
}

.btn .arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .arrow-right {
  transform: translateX(3px);
}

.btn:hover .arrow-left {
  transform: translateX(-3px);
}

/* ─── Results Section ──────────────────────────────────────────── */
.results-section {
  display: none;
  animation: panelEnter 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.results-section.visible {
  display: block;
}

.results-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.results-header h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

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

.results-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.summary-card {
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  text-align: center;
}

.summary-card .summary-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-primary);
}

.summary-card .summary-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Result Cards */
.results-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.result-card {
  background: var(--bg-surface);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-slow);
  animation: cardEnter 0.5s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.result-card:nth-child(1) { animation-delay: 0.1s; }
.result-card:nth-child(2) { animation-delay: 0.2s; }
.result-card:nth-child(3) { animation-delay: 0.3s; }
.result-card:nth-child(4) { animation-delay: 0.4s; }
.result-card:nth-child(5) { animation-delay: 0.5s; }

@keyframes cardEnter {
  0% { opacity: 0; transform: translateY(30px) scale(0.98); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

.result-card:hover {
  border-color: rgba(var(--accent-primary-rgb), 0.3);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.result-card.top-pick {
  border-color: rgba(var(--accent-primary-rgb), 0.4);
  box-shadow: var(--shadow-glow);
}

.result-card.top-pick::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.result-card-main {
  display: flex;
  align-items: center;
  padding: var(--space-lg) var(--space-xl);
  gap: var(--space-xl);
  cursor: pointer;
  position: relative;
}

.top-pick-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: 0 2px 10px rgba(var(--accent-primary-rgb), 0.3);
}

/* Circular Progress Gauge */
.match-gauge {
  position: relative;
  width: 80px;
  height: 80px;
  flex-shrink: 0;
}

.match-gauge svg {
  width: 80px;
  height: 80px;
  transform: rotate(-90deg);
}

.match-gauge .gauge-bg {
  fill: none;
  stroke: var(--border-medium);
  stroke-width: 6;
}

.match-gauge .gauge-fill {
  fill: none;
  stroke-width: 6;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.match-gauge .gauge-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
}

.match-gauge .gauge-percent {
  font-size: 0.65rem;
  font-weight: 400;
  color: var(--text-muted);
}

.result-info {
  flex: 1;
  min-width: 0;
}

.result-info h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.result-info h3 .ndds-icon {
  font-size: 1.3rem;
}

.result-info .ndds-category {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.result-info .result-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.result-expand-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-sm);
  display: flex;
  align-items: center;
  transition: var(--transition-base);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.result-expand-btn:hover {
  color: var(--accent-primary);
}

.result-expand-btn .expand-icon {
  transition: transform var(--transition-base);
}

.result-card.expanded .result-expand-btn .expand-icon {
  transform: rotate(180deg);
}

/* Expanded Detail Panel */
.result-details {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.result-card.expanded .result-details {
  max-height: 1200px;
}

.result-details-inner {
  padding: 0 var(--space-xl) var(--space-xl);
  border-top: 1px solid var(--border-subtle);
}

.detail-section {
  margin-top: var(--space-lg);
}

.detail-section h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
}

.detail-tag {
  padding: 0.3rem 0.7rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.detail-tag.matched {
  background: rgba(var(--accent-primary-rgb), 0.12);
  border-color: rgba(var(--accent-primary-rgb), 0.3);
  color: var(--accent-primary);
}

.detail-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xs);
}

.detail-list li {
  font-size: 0.84rem;
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.detail-list li .check {
  color: var(--accent-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.detail-list li .cross {
  color: var(--accent-danger);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Scoring Breakdown */
.score-breakdown {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-sm);
}

.score-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.score-bar-wrapper {
  flex: 1;
  height: 6px;
  background: var(--border-medium);
  border-radius: 3px;
  overflow: hidden;
}

.score-bar {
  height: 100%;
  border-radius: 3px;
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.score-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  min-width: 80px;
}

.score-value {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  min-width: 35px;
  text-align: right;
}

.detail-references {
  margin-top: var(--space-md);
}

.detail-references p {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.6;
}

/* ─── Rationale Section ────────────────────────────────────────── */
.rationale-box {
  background: rgba(var(--accent-primary-rgb), 0.05);
  border: 1px solid rgba(var(--accent-primary-rgb), 0.15);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  margin-top: var(--space-md);
}

.rationale-box h4 {
  color: var(--accent-primary);
  margin-bottom: var(--space-sm);
}

.rationale-box p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── Loading Animation ────────────────────────────────────────── */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(6, 9, 26, 0.9);
  backdrop-filter: blur(10px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: var(--space-xl);
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  width: 60px;
  height: 60px;
  position: relative;
}

.loading-spinner .spinner-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 3px solid transparent;
  border-radius: 50%;
}

.loading-spinner .spinner-ring:nth-child(1) {
  border-top-color: var(--accent-primary);
  animation: spin 1s linear infinite;
}

.loading-spinner .spinner-ring:nth-child(2) {
  border-right-color: var(--accent-secondary);
  animation: spin 1.5s linear infinite reverse;
}

.loading-spinner .spinner-ring:nth-child(3) {
  width: 70%;
  height: 70%;
  top: 15%;
  left: 15%;
  border-bottom-color: var(--accent-tertiary);
  animation: spin 2s linear infinite;
}

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

.loading-text {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--text-secondary);
  animation: loadingPulse 1.5s ease-in-out infinite;
}

@keyframes loadingPulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ─── Tooltip ──────────────────────────────────────────────────── */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.95);
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
  z-index: 50;
  max-width: 300px;
  white-space: normal;
  text-align: center;
  line-height: 1.4;
}

.tooltip:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* ─── Footer ───────────────────────────────────────────────────── */
.app-footer {
  padding: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.app-footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.app-footer a {
  color: var(--accent-primary);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

/* ─── Responsive Design ────────────────────────────────────────── */
@media (max-width: 900px) {
  .stepper {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }

  .step-connector {
    width: 30px;
  }

  .step-label {
    display: none;
  }

  .header-content {
    flex-direction: column;
    text-align: center;
  }

  .result-card-main {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }

  .top-pick-badge {
    position: static;
    margin-bottom: var(--space-sm);
  }

  .main-content {
    padding: var(--space-lg) var(--space-md);
  }

  .form-panel {
    padding: var(--space-lg);
  }
}

@media (max-width: 600px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .results-summary {
    grid-template-columns: 1fr 1fr;
  }

  .score-breakdown {
    grid-template-columns: 1fr;
  }

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

  .form-nav {
    flex-direction: column-reverse;
    gap: var(--space-md);
  }

  .form-nav .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ─── Utility Classes ──────────────────────────────────────────── */
.text-center { text-align: center; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }

/* ─── Scrollbar ────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}

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

/* ─── Selection ────────────────────────────────────────────────── */
::selection {
  background: rgba(var(--accent-primary-rgb), 0.3);
  color: var(--text-primary);
}