:root {
  /* Color Palette - Sophisticated Medical & Trust */
  --color-primary: #5d48a3; /* Deep Purple - Wisdom & Compassion */
  --color-primary-light: #f3f0ff;
  --color-secondary: #2c7da0; /* Trust Blue */
  --color-accent: #ff8fa3; /* Soft Pink - Health & Empathy */
  --color-bg: #fdfdfd;
  --color-surface: #ffffff;
  --color-text: #1a1a2e;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;
  --space-2xl: 96px;

  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 5vw, 4rem);
}

/* Navigation */
.nav {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: saturate(180%) blur(10px);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  position: relative;
}

/* Unique Brand Logo SVG - Handcrafted look */
.brand-mark {
  filter: drop-shadow(0 4px 6px rgba(93, 72, 163, 0.1));
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.logo:hover .brand-mark {
  transform: rotate(15deg) scale(1.1);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 100px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, background-color 0.2s;
  border: none;
  font-family: var(--font-body);
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(93, 72, 163, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

/* Hero Section */
.hero {
  padding: var(--space-2xl) 0;
  background: radial-gradient(circle at 90% 10%, var(--color-primary-light) 0%, transparent 40%);
  min-height: 80vh;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1;
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.hero-content p {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: var(--space-lg);
}

/* Section Transitions */
section {
  margin-top: var(--space-xl);
  padding: var(--space-lg) 0;
}

/* Card Components */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  border-radius: 24px;
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: var(--color-primary-light);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

/* Split Mode Section */
.mode-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.mode-card {
  padding: var(--space-xl);
  border-radius: 32px;
  display: flex;
  flex-direction: column;
}

.mode-doctor {
  background: #f8fafc;
  border: 1px solid var(--color-secondary);
}

.mode-patient {
  background: #fffafa;
  border: 1px solid var(--color-accent);
}

/* Tech Pill */
.tech-pill {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0,0,0,0.05);
  border-radius: 6px;
  font-size: 0.8rem;
  margin: 4px;
  font-weight: 500;
}

/* Architecture Visual */
.arch-visual {
  background: #1a1a2e;
  color: white;
  border-radius: 40px;
  padding: var(--space-xl);
  margin-top: var(--space-xl);
}

.arch-node {
  border: 1px solid rgba(255,255,255,0.2);
  padding: var(--space-md);
  border-radius: 12px;
  text-align: center;
  background: rgba(255,255,255,0.05);
}

/* Nav Utility */
.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

/* Hero Styles */
.hero-actions {
  display: flex;
  gap: 16px;
}

.hero-image-container {
  aspect-ratio: 1/1;
  border-radius: 40px;
  background: linear-gradient(135deg, var(--color-primary-light) 0%, #e2e8f0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-svg-icon {
  opacity: 0.5;
}

/* Section Common */
.section-header {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  margin-bottom: var(--space-xl);
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
}

/* Mode Card Details */
.card-header-v2 {
  margin-bottom: var(--space-lg);
}

.mode-title {
  margin-top: 12px;
}

.clinical-text {
  color: var(--color-secondary);
}

.supportive-text {
  color: var(--color-accent);
}

.pill-clinical {
  background: var(--color-secondary);
  color: white;
}

.pill-supportive {
  background: var(--color-accent);
  color: white;
}

.mode-footer {
  margin-top: auto;
}

.tech-pills {
  margin-bottom: 16px;
}

/* Architecture Visual Details */
.arch-title {
  margin-bottom: var(--space-lg);
  text-align: center;
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.arch-label {
  opacity: 0.6;
  display: block;
  margin-bottom: 8px;
}

.arch-footer {
  margin-top: 40px;
  padding-top: 40px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.arch-desc {
  font-size: 0.9rem;
  opacity: 0.8;
}

/* Team Section Details */
.team-title {
  text-align: center;
  margin-bottom: var(--space-xl);
}

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

.team-avatar {
  margin: 0 auto 16px auto;
}

.team-role {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.team-quote {
  font-style: italic;
  font-size: 0.9rem;
  margin-top: 12px;
}

/* Footer Details */
.footer-bottom {
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
}

/* Dashboard & Chat Styles (Moved from doctor-portal) */
.dashboard-layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    min-height: calc(100vh - 80px);
}
.sidebar {
    background: #f8fafc;
    border-right: 1px solid var(--color-border);
    padding: var(--space-lg);
}
.chat-container {
    display: flex;
    flex-direction: column;
    background: #fff;
}
.chat-messages {
    flex: 1;
    padding: var(--space-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}
.msg {
    max-width: 80%;
    padding: 16px;
    border-radius: 16px;
}
.msg-ai {
    align-self: flex-start;
    background: #f1f5f9;
    border-bottom-left-radius: 4px;
}
.msg-user {
    align-self: flex-end;
    background: var(--color-secondary);
    color: white;
    border-bottom-right-radius: 4px;
}
.chat-input-area {
    padding: var(--space-lg);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: 16px;
}
.chat-input {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    font-family: inherit;
}
.reference-panel {
    font-size: 0.85rem;
    margin-top: 12px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
}

/* Specific Dashboard Helpers */
.badge-mode {
    font-size: 0.7rem;
    background: var(--color-secondary);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: 8px;
}
.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
}
.toolkit-title {
    margin-bottom: 24px;
    color: var(--color-secondary);
}
.toolkit-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.toolkit-item {
    padding: 12px;
    border-radius: 12px;
    border: 1px solid transparent;
}
.toolkit-item-active {
    background: white;
    border-color: var(--color-border);
}
.toolkit-label {
    text-transform: uppercase;
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--color-text-muted);
}
.med-support-box {
    margin-top: 40px;
    padding: 16px;
    background: var(--color-primary-light);
    border-radius: 16px;
}
.med-support-title {
    font-size: 0.8rem;
    color: var(--color-primary);
    font-weight: 600;
}

/* Placeholder Utility */
.placeholder-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: #f1f5f9;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border: 1px dashed var(--color-border);
}

.placeholder-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Footer */
footer {
  margin-top: var(--space-2xl);
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  background: white;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .hero-grid, .mode-section, .footer-grid {
    grid-template-columns: 1fr;
  }
}