/* ========================================
   Novolene — Clinical Design System
   MEDVi-Inspired Clean Medical Aesthetic
   ======================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ── CSS Custom Properties ── */
:root {
  /* Colors — Clinical Clean */
  --color-bg-primary: #FFFFFF;
  --color-bg-secondary: #F7F9FC;
  --color-bg-tertiary: #EEF2F7;
  --color-bg-card: #FFFFFF;
  --color-bg-card-hover: #F8FAFD;
  --color-bg-elevated: #FFFFFF;
  --color-bg-input: #F5F7FA;
  --color-bg-dark: #0B1120;
  --color-bg-dark-secondary: #111827;

  /* Colors — Brand */
  --color-primary: #2563EB;
  --color-primary-hover: #1D4ED8;
  --color-primary-light: #DBEAFE;
  --color-primary-subtle: rgba(37, 99, 235, 0.08);
  --color-primary-glow: rgba(37, 99, 235, 0.25);
  --color-secondary: #0EA5E9;
  --color-accent: #10B981;
  --color-accent-light: #D1FAE5;
  --color-purple: #8B5CF6;
  --color-purple-light: #EDE9FE;
  --color-coral: #F43F5E;
  --color-coral-light: #FFE4E6;
  --color-amber: #F59E0B;
  --color-amber-light: #FEF3C7;

  /* Colors — Text */
  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #94A3B8;
  --color-text-light: #FFFFFF;
  --color-text-accent: var(--color-primary);

  /* Colors — Borders */
  --color-border: #E2E8F0;
  --color-border-hover: #CBD5E1;
  --color-border-accent: rgba(37, 99, 235, 0.3);

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --text-6xl: 4.5rem;
  --text-hero: clamp(2.5rem, 5vw, 4.5rem);

  /* 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;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --max-width-narrow: 800px;
  --header-height: 72px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Shadows — Soft & Clinical */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.10);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 1px 3px rgba(0,0,0,0.04), 0 6px 16px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.08), 0 12px 32px rgba(0,0,0,0.10);

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

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

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

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
}

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

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* ── Typography ── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-hero); font-weight: 800; }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--color-primary-hover); }

strong { font-weight: 600; color: var(--color-text-primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }

/* ── Buttons ── */
button {
  font-family: var(--font-body);
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 4px 14px var(--color-primary-glow);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--color-primary-glow);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.btn-dark {
  background: var(--color-bg-dark);
  color: white;
}
.btn-dark:hover {
  background: #1E293B;
  transform: translateY(-2px);
  color: white;
}

.btn-white {
  background: white;
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
}
.btn-white:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background: var(--color-accent);
  color: white;
}
.btn-accent:hover {
  background: #059669;
  transform: translateY(-2px);
  color: white;
}

.btn-lg {
  padding: 18px 44px;
  font-size: var(--text-lg);
}
.btn-sm {
  padding: 10px 24px;
  font-size: var(--text-sm);
}
.btn-xl {
  padding: 20px 52px;
  font-size: var(--text-lg);
  font-weight: 700;
}
.btn-icon {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Form Elements ── */
input, textarea, select {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background: var(--color-bg-input);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  width: 100%;
  transition: all var(--transition-base);
  outline: none;
}
input:focus, textarea:focus, select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-subtle);
  background: white;
}
input::placeholder, textarea::placeholder {
  color: var(--color-text-muted);
}
label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}
.container-narrow { max-width: var(--max-width-narrow); }

.section { padding: var(--space-5xl) 0; }
.section-sm { padding: var(--space-3xl) 0; }

/* ── Section Headers ── */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 8px 20px;
  background: var(--color-primary-light);
  border: 1px solid var(--color-border-accent);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-lg);
}
.section-title { margin-bottom: var(--space-md); }
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Cards ── */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}
.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-full);
}
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-accent { background: var(--color-accent-light); color: var(--color-accent); }
.badge-popular {
  background: linear-gradient(135deg, var(--color-primary), var(--color-purple));
  color: white;
}
.badge-sale { background: var(--color-coral-light); color: var(--color-coral); }

/* ── Trust Bar ── */
.trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
  padding: var(--space-lg) 0;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.trust-item .icon {
  font-size: 1.25rem;
}

/* ── Stats Row ── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  padding: var(--space-3xl) 0;
}
.stat-item {
  text-align: center;
}
.stat-number {
  font-family: var(--font-heading);
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
}
.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ── Divider ── */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-xl) 0;
}

/* ── Stars ── */
.stars {
  display: flex;
  gap: 2px;
  color: var(--color-amber);
  font-size: var(--text-sm);
}

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.gap-2xl { gap: var(--space-2xl); }
.grid { display: grid; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.text-center { text-align: center; }
.text-left { text-align: left; }

/* Spacing */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }

/* ── Animations ── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Dark Section ── */
.section-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}
.section-dark h2, .section-dark h3, .section-dark h4 {
  color: white;
}
.section-dark p {
  color: rgba(255,255,255,0.7);
}
.section-dark .section-badge {
  background: rgba(37, 99, 235, 0.2);
  border-color: rgba(37, 99, 235, 0.3);
}

/* ── Light Grey Section ── */
.section-grey {
  background: var(--color-bg-secondary);
}

/* ── FDA Disclaimer ── */
.fda-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  padding: var(--space-xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

/* ── Gradient Mesh Background ── */
.gradient-mesh {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 10% 0%, rgba(37, 99, 235, 0.04), transparent),
    radial-gradient(ellipse 50% 40% at 90% 100%, rgba(14, 165, 233, 0.03), transparent);
}

/* ── Screen reader only ── */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border-width: 0;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--space-3xl) 0; }
  h1 { font-size: var(--text-3xl); }
  h2 { font-size: var(--text-3xl); }
  .container { padding: 0 var(--space-lg); }
  .trust-bar { gap: var(--space-lg); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .btn-lg, .btn-xl { padding: 16px 32px; font-size: var(--text-base); }
}