:root {
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.2);
}

body.dark-mode {
  --bg: #221712;
  --on-bg: #F3DFD6;
  --surface: #2A1C16;
  --on-surface: #F3DFD6;
  --on-surface-subtle: #D5B5A8;

  --primary: #F0B49B;
  --on-primary: #4A2417;
  --primary-container: #7B4A38;
  --on-primary-container: #FFDBC9;

  --secondary: #E3B7A5;
  --on-secondary: #45261B;
  --secondary-container: #6A4537;
  --on-secondary-container: #F8DDD2;

  --error: #FFB59A;
  --on-error: #5C2413;

  --border: rgba(255, 240, 235, 0.1);
  --border-active: rgba(240, 180, 155, 0.35);
  --card-glow: rgba(201, 125, 96, 0.28);

  --gradient-hero: linear-gradient(135deg, #F0B49B 0%, #C97D60 100%);
  --orb-color-1: rgba(201, 125, 96, 0.26);
  --orb-color-2: rgba(123, 74, 56, 0.28);
}

body.light-mode {
  --bg: #FFF8F4;
  --on-bg: #382219;
  --surface: #FFFBF8;
  --on-surface: #382219;
  --on-surface-subtle: #7C5A4B;

  --primary: #C97D60;
  --on-primary: #FFFFFF;
  --primary-container: #F6D0BF;
  --on-primary-container: #4F2415;

  --secondary: #AF6A52;
  --on-secondary: #FFFFFF;
  --secondary-container: #F4DED3;
  --on-secondary-container: #4A281D;

  --error: #9A523A;
  --on-error: #FFFFFF;

  --border: rgba(56, 34, 25, 0.08);
  --border-active: rgba(201, 125, 96, 0.28);
  --card-glow: rgba(240, 180, 155, 0.35);

  --gradient-hero: linear-gradient(135deg, #C97D60 0%, #AF6A52 100%);
  --orb-color-1: rgba(246, 208, 191, 0.42);
  --orb-color-2: rgba(244, 222, 211, 0.46);
}

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

body {
  font-family: var(--font-body);
  background:
    radial-gradient(circle at top right, rgba(201, 125, 96, 0.1), transparent 34%),
    radial-gradient(circle at bottom left, rgba(240, 180, 155, 0.12), transparent 32%),
    var(--bg);
  color: var(--on-bg);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body.single-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
}

h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
}

a {
  text-decoration: none;
  color: inherit;
}

.container {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
  transition: background-color var(--transition-normal);
}

.orb-1 {
  width: 350px;
  height: 350px;
  top: 10%;
  right: -50px;
  background-color: var(--orb-color-1);
}

.orb-2 {
  width: 300px;
  height: 300px;
  bottom: 10%;
  left: -50px;
  background-color: var(--orb-color-2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  gap: 8px;
  flex: 1;
}

.btn-lg {
  padding: 16px 28px;
  font-size: 16px;
}

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

.btn-primary:hover {
  opacity: 0.94;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--card-glow);
}

.landing-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-lg), 0 0 40px var(--card-glow);
  display: flex;
  flex-direction: column;
  gap: 32px;
  width: 100%;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 24px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  color: var(--primary);
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.hero-title {
  font-size: 40px;
  line-height: 1.2;
  letter-spacing: -1.25px;
}

.text-gradient {
  background: var(--gradient-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--on-surface-subtle);
  line-height: 1.6;
}

.features-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin: 10px 0;
}

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.feature-icon {
  font-size: 24px;
  line-height: 1;
  flex-shrink: 0;
}

.feature-text {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.feature-text strong {
  font-size: 15px;
  color: var(--on-bg);
}

.feature-text span {
  font-size: 13.5px;
  color: var(--on-surface-subtle);
  line-height: 1.5;
}

.actions-wrapper {
  display: flex;
  gap: 16px;
  margin-top: 10px;
}

.card-footer {
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.clinical-disclaimer {
  font-size: 12px;
  background-color: var(--bg);
  padding: 16px;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--error);
  line-height: 1.5;
  color: var(--on-surface-subtle);
}

@media (max-width: 576px) {
  body.single-screen {
    padding: 24px 16px;
  }

  .landing-card {
    padding: 32px 24px;
    gap: 24px;
  }

  .hero-title {
    font-size: 32px;
  }

  .actions-wrapper {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
  }
}