/* Serenlita.shop - Bio Neon Unique Asymmetric Layout | Completely Original Design 2026 */
/* Never before used in this chat: Dark bio-neon palette, asymmetric creative grid, split-hero with CSS organic neon elements, pill buttons with multi-glow, soft 20px radius cards, generous spacing, magazine-blog hybrid with creative blocks */

:root {
  --bg-primary: #0a0f1e;
  --bg-card: #111827;
  --bg-elevated: #1a2332;
  --accent-primary: #14b8a6;
  --accent-secondary: #a855f7;
  --accent-glow: #67e8f9;
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  --border-subtle: #334155;
  --radius-soft: 20px;
  --radius-pill: 9999px;
  --shadow-soft: 0 10px 30px -15px rgba(0, 0, 0, 0.4);
  --shadow-neon: 0 0 15px rgba(20, 184, 166, 0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

/* Typography - Unique bio-neon editorial feel */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

h1 { font-size: clamp(2.8rem, 6vw, 4.2rem); }
h2 { font-size: clamp(2rem, 4.5vw, 2.8rem); }
h3 { font-size: clamp(1.4rem, 3vw, 1.85rem); }

p {
  margin-bottom: 1.25rem;
  max-width: 72ch;
}

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

a:hover {
  color: var(--accent-secondary);
  text-shadow: 0 0 8px rgba(168, 85, 247, 0.4);
}

/* Header & Navigation - Clean with neon underline */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(10, 15, 30, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  text-shadow: 0 0 12px rgba(20, 184, 166, 0.5);
}

.logo span {
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav ul {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

nav a {
  font-weight: 600;
  font-size: 1rem;
  position: relative;
  padding-bottom: 4px;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, var(--accent-primary), var(--accent-secondary));
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Mobile Menu */
#mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1.5rem 2rem;
  flex-direction: column;
  gap: 1.25rem;
}

.mobile-nav.show {
  display: flex;
}

.mobile-nav a {
  font-size: 1.15rem;
  padding: 0.5rem 0;
}

/* Hero Split Screen - Asymmetric & Neon Visual */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 82vh;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  align-items: center;
  gap: 3rem;
}

.hero-content {
  padding-right: 2rem;
}

.hero-content h1 {
  margin-bottom: 1.25rem;
  background: linear-gradient(90deg, var(--text-primary), #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-content .subtitle {
  font-size: 1.35rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  max-width: 48ch;
}

.hero-visual {
  position: relative;
  background: linear-gradient(145deg, #1a2332 0%, #0f172a 100%);
  border-radius: var(--radius-soft);
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: var(--shadow-soft), var(--shadow-neon);
  border: 1px solid var(--border-subtle);
}

/* Organic neon bio elements in hero visual - pure CSS, no images */
.hero-visual::before {
  content: '';
  position: absolute;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  top: 15%;
  right: 10%;
  animation: bio-float 8s ease-in-out infinite;
}

.hero-visual::after {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.12) 0%, transparent 65%);
  border-radius: 50%;
  bottom: 18%;
  left: 12%;
  animation: bio-float 11s ease-in-out infinite reverse;
}

.neon-ring {
  position: absolute;
  border: 1.5px solid rgba(103, 232, 249, 0.35);
  border-radius: 50%;
  animation: neon-pulse 6s ease-in-out infinite;
}

.neon-ring.r1 { width: 220px; height: 220px; top: 22%; left: 18%; }
.neon-ring.r2 { width: 140px; height: 140px; bottom: 25%; right: 22%; animation-delay: 2.5s; }

@keyframes bio-float {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-25px) scale(1.03); }
}

@keyframes neon-pulse {
  0%, 100% { opacity: 0.35; transform: scale(1); }
  50% { opacity: 0.75; transform: scale(1.08); }
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  color: #0a0f1e;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 1rem 2.25rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  box-shadow: 0 10px 25px -8px rgba(20, 184, 166, 0.5), 0 0 20px rgba(168, 85, 247, 0.3);
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px -10px rgba(20, 184, 166, 0.6), 0 0 30px rgba(168, 85, 247, 0.5);
  color: #0a0f1e;
}

/* Section Styling */
section {
  max-width: 1280px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--text-muted);
  font-size: 1.15rem;
  max-width: 58ch;
  margin: 0 auto;
}

/* Asymmetric Creative Grid - Unique never-before layout */
.asymmetric-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 2rem;
  grid-auto-rows: minmax(180px, auto);
}

.asymmetric-grid .card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-soft);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.asymmetric-grid .card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-soft), 0 0 25px rgba(20, 184, 166, 0.15);
}

.asymmetric-grid .card.featured {
  grid-column: span 1;
  background: linear-gradient(165deg, var(--bg-elevated) 0%, var(--bg-card) 100%);
  border-color: var(--accent-primary);
}

.asymmetric-grid .card.large {
  grid-column: span 2;
  padding: 2.5rem;
}

@media (max-width: 900px) {
  .asymmetric-grid .card.large,
  .asymmetric-grid .card.featured {
    grid-column: span 1;
  }
}

.card h3 {
  color: var(--accent-primary);
  margin-bottom: 1rem;
  font-size: 1.45rem;
}

.card .meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.card p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
}

.card .read-more {
  display: inline-block;
  margin-top: 1.25rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--accent-secondary);
  position: relative;
}

.card .read-more::after {
  content: ' →';
  transition: var(--transition);
}

.card:hover .read-more::after {
  transform: translateX(4px);
}

/* Long-form Content Blocks - Unique modular text layout */
.long-text {
  max-width: 820px;
  margin: 0 auto;
  font-size: 1.08rem;
  color: var(--text-secondary);
}

.long-text h3 {
  color: var(--text-primary);
  margin: 2.5rem 0 1rem;
  font-size: 1.55rem;
}

.long-text ul {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.long-text li {
  margin-bottom: 0.75rem;
}

/* Sidebar - Asymmetric companion */
.sidebar {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-soft);
  padding: 2.25rem;
  position: sticky;
  top: 120px;
  height: fit-content;
}

.sidebar h4 {
  color: var(--accent-primary);
  margin-bottom: 1.25rem;
  font-size: 1.15rem;
  letter-spacing: 0.5px;
}

.sidebar ul {
  list-style: none;
}

.sidebar li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.sidebar li:last-child {
  border-bottom: none;
}

.sidebar a {
  color: var(--text-secondary);
  font-weight: 500;
}

.sidebar a:hover {
  color: var(--accent-primary);
  padding-left: 4px;
}

/* Two Column Asymmetric Section */
.split-content {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .split-content {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

/* Form Styling - Clean neon */
form {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-soft);
  padding: 2.5rem;
  max-width: 620px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

input, textarea, select {
  width: 100%;
  padding: 0.95rem 1.15rem;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  color: var(--text-primary);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.1);
}

textarea {
  min-height: 160px;
  resize: vertical;
}

.submit-btn {
  width: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  color: #0a0f1e;
  font-weight: 700;
  font-size: 1.1rem;
  padding: 1.1rem;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  box-shadow: 0 10px 25px -8px rgba(20, 184, 166, 0.5);
  transition: var(--transition);
}

.submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px -10px rgba(20, 184, 166, 0.65);
}

/* Footer - Unique with neon separator */
footer {
  background-color: #05080f;
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 2rem 2.5rem;
  margin-top: 6rem;
}

.footer-content {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.footer-brand .logo {
  font-size: 1.6rem;
  margin-bottom: 1rem;
  display: block;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 32ch;
}

.footer-links h5 {
  color: var(--accent-primary);
  margin-bottom: 1.1rem;
  font-size: 1rem;
}

.footer-links a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: 0.55rem;
  font-size: 0.95rem;
}

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

.footer-bottom {
  max-width: 1280px;
  margin: 3.5rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-bottom a {
  color: var(--text-muted);
}

.footer-bottom a:hover {
  color: var(--accent-primary);
}

/* Thank You & Legal Pages */
.legal-page {
  max-width: 860px;
  margin: 0 auto;
  padding: 4rem 2rem;
}

.legal-page h1 {
  margin-bottom: 0.5rem;
}

.legal-page .last-updated {
  color: var(--text-muted);
  margin-bottom: 3rem;
  font-size: 0.95rem;
}

.legal-page h2 {
  color: var(--accent-primary);
  margin-top: 3rem;
  margin-bottom: 1rem;
  font-size: 1.45rem;
}

.legal-page p, .legal-page li {
  color: var(--text-secondary);
}

.legal-page ul {
  padding-left: 1.75rem;
  margin: 1rem 0 2rem;
}

.disclaimer {
  background-color: var(--bg-card);
  border-left: 5px solid var(--accent-primary);
  padding: 1.5rem 2rem;
  margin: 2.5rem 0;
  border-radius: 0 var(--radius-soft) var(--radius-soft) 0;
  font-size: 0.98rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
  .nav-container {
    padding: 1rem 1.25rem;
  }
  
  nav ul {
    display: none;
  }
  
  #mobile-menu-btn {
    display: block;
  }
  
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 3rem 1.25rem 4rem;
    gap: 2.5rem;
  }
  
  .hero-content {
    padding-right: 0;
    text-align: center;
  }
  
  .hero-content .subtitle {
    margin: 0 auto 2rem;
  }
  
  section {
    padding: 4rem 1.25rem;
  }
  
  .asymmetric-grid {
    grid-template-columns: 1fr;
  }
}

/* Extra unique touches */
.glow-accent {
  text-shadow: 0 0 10px rgba(20, 184, 166, 0.6);
}

.tag {
  display: inline-block;
  background-color: rgba(20, 184, 166, 0.1);
  color: var(--accent-primary);
  font-size: 0.75rem;
  padding: 0.25rem 0.85rem;
  border-radius: 9999px;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}