:root {
  --primary: #0B132B; /* Deep Space Blue */
  --secondary: #1C2541; /* Dark Slate */
  --accent: #48CAE4; /* Biotech Cyan */
  --accent-dark: #0077B6; /* Oceanic Blue */
  --text-light: #F8F9FA;
  --text-dark: #212529;
  --bg-main: #F4F6F8;
  --font-heading: 'Syne', sans-serif;
  --font-body: 'Epilogue', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-body); background-color: var(--bg-main); color: var(--text-dark); line-height: 1.6; overflow-x: hidden; }

/* Typography */
h1, h2, h3, h4, .logo { font-family: var(--font-heading); font-weight: 800; color: var(--primary); }
h1 { font-size: clamp(3rem, 6vw, 5rem); line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 1.5rem; color: var(--text-light); }
h2 { font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1.1; margin-bottom: 2rem; letter-spacing: -0.02em; }
p { font-size: 1.125rem; margin-bottom: 1.5rem; color: #495057; }
a { text-decoration: none; color: inherit; transition: color 0.3s; }

.container { width: 100%; max-width: 1300px; margin: 0 auto; padding: 0 2rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 1.25rem 2.5rem; border: none; font-family: var(--font-heading); font-weight: 700; font-size: 1.1rem; text-transform: uppercase; letter-spacing: 1px; cursor: pointer; transition: all 0.3s ease; border-radius: 4px; }
.btn-accent { background: var(--accent); color: var(--primary); box-shadow: 0 10px 20px rgba(72, 202, 228, 0.2); }
.btn-accent:hover { background: var(--accent-dark); color: var(--text-light); transform: translateY(-3px); }

/* Header */
header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid rgba(0,0,0,0.05); }
.header-wrap { display: flex; justify-content: space-between; align-items: center; height: 90px; }
.logo { display: flex; align-items: center; gap: 15px; font-size: 1.5rem; color: var(--primary); }
.logo img { width: 40px; height: 40px; }
.nav-links { display: none; }

/* Unique Element: Molecular Background Pattern */
.molecule-bg {
    background-color: var(--primary);
    background-image: radial-gradient(var(--accent) 1px, transparent 1px), radial-gradient(var(--accent) 1px, transparent 1px);
    background-position: 0 0, 25px 25px;
    background-size: 50px 50px;
    position: relative;
    overflow: hidden;
}
.molecule-bg::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(11, 19, 43, 0.9) 0%, rgba(28, 37, 65, 0.8) 100%);
    z-index: 1;
}
.molecule-bg > * { position: relative; z-index: 2; }

/* Hero */
.hero { padding: 8rem 0; text-align: left; color: var(--text-light); }
.hero-content { max-width: 800px; }
.hero p { color: #ADB5BD; font-size: 1.25rem; max-width: 600px; }

/* Random Section (Form is placed second for structural randomness) */
.form-section { padding: 6rem 0; background: var(--text-light); margin-top: -4rem; position: relative; z-index: 10; border-radius: 20px 20px 0 0; box-shadow: 0 -20px 40px rgba(0,0,0,0.05); }
.form-grid { display: grid; grid-template-columns: 1fr; gap: 4rem; }
.form-text h2 { color: var(--primary); }
.form-box { background: var(--bg-main); padding: 3rem; border-radius: 12px; border: 1px solid #E9ECEF; }
.form-group { margin-bottom: 1.5rem; }
.form-control { width: 100%; padding: 1.2rem; border: 2px solid #DEE2E6; border-radius: 6px; font-family: var(--font-body); font-size: 1rem; transition: border-color 0.3s; background: var(--text-light); }
.form-control:focus { outline: none; border-color: var(--accent-dark); }
.checkbox-wrap { display: flex; align-items: flex-start; gap: 1rem; margin-top: 1rem; }
.checkbox-wrap input { margin-top: 0.3rem; width: 20px; height: 20px; cursor: pointer; }
.checkbox-wrap label { font-size: 0.9rem; color: #6C757D; }
.success-msg { display: none; text-align: center; padding: 3rem; }
.success-msg i { font-size: 4rem; color: var(--accent-dark); margin-bottom: 1.5rem; }
.success-msg h3 { font-family: var(--font-heading); font-size: 2rem; margin-bottom: 1rem; color: var(--primary); }

/* About & Features */
.about { padding: 6rem 0; }
.features { padding: 8rem 0; background: var(--text-light); }
.feat-grid { display: grid; grid-template-columns: 1fr; gap: 4rem; align-items: center; }
.feat-img { position: relative; border-radius: 12px; overflow: hidden; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
.feat-img img { width: 100%; height: auto; display: block; }
.feat-list { margin-top: 2rem; }
.feat-list li { display: flex; gap: 1.5rem; margin-bottom: 2rem; align-items: flex-start; }
.feat-icon { background: var(--bg-main); width: 60px; height: 60px; display: flex; align-items: center; justify-content: center; border-radius: 50%; color: var(--accent-dark); font-size: 1.5rem; flex-shrink: 0; }
.feat-text h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

/* Random Structural Section (Methodology) */
.methodology { padding: 8rem 0; text-align: center; color: var(--text-light); }
.methodology h2 { color: var(--text-light); }
.meth-grid { display: grid; grid-template-columns: 1fr; gap: 2rem; margin-top: 4rem; }
.meth-card { background: rgba(255,255,255,0.05); padding: 3rem; border-radius: 12px; border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(5px); }
.meth-card h3 { color: var(--accent); font-size: 2rem; margin-bottom: 1rem; }
.meth-card p { color: #CED4DA; margin: 0; }

/* FAQ */
.faq { padding: 6rem 0; background: var(--bg-main); }
.faq-container { max-width: 800px; margin: 0 auto; }
details { background: var(--text-light); border-radius: 8px; margin-bottom: 1rem; box-shadow: 0 4px 6px rgba(0,0,0,0.02); border: 1px solid #E9ECEF; overflow: hidden; }
summary { padding: 1.5rem; font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; }
summary::-webkit-details-marker { display: none; }
summary::after { content: '\f067'; font-family: 'Font Awesome 6 Free'; font-weight: 900; color: var(--accent-dark); transition: transform 0.3s; }
details[open] summary::after { transform: rotate(45deg); }
details p { padding: 0 1.5rem 1.5rem; margin: 0; color: #495057; }

/* Footer */
footer { background: var(--primary); color: #ADB5BD; padding: 4rem 0 2rem; text-align: center; border-top: 4px solid var(--accent); }
.footer-logo { font-family: var(--font-heading); font-size: 1.8rem; color: var(--text-light); margin-bottom: 1.5rem; display: block; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 2rem; margin-bottom: 2rem; }
.footer-links a:hover { color: var(--accent); }

/* Cookie Banner */
.cookie-banner { position: fixed; bottom: -100%; left: 0; width: 100%; background: var(--secondary); color: var(--text-light); padding: 1.5rem 0; z-index: 9999; transition: bottom 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55); box-shadow: 0 -10px 30px rgba(0,0,0,0.2); }
.cookie-banner.show { bottom: 0; }
.cookie-wrap { display: flex; flex-direction: column; gap: 1.5rem; align-items: center; text-align: center; }
.cookie-text p { margin: 0; font-size: 0.95rem; color: #CED4DA; }
.cookie-actions { display: flex; gap: 1rem; }
.btn-cookie { padding: 0.8rem 1.5rem; border: none; font-family: var(--font-heading); font-weight: 700; cursor: pointer; border-radius: 4px; }
.btn-cookie.accept { background: var(--accent); color: var(--primary); }
.btn-cookie.decline { background: transparent; border: 1px solid #CED4DA; color: var(--text-light); }

/* Legal Pages */
.legal-page { padding: 4rem 0 8rem; }
.legal-card { background: var(--text-light); padding: 4rem; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); }
.legal-card h1 { color: var(--primary); font-size: 2.5rem; margin-bottom: 1rem; border-bottom: 3px solid var(--accent); padding-bottom: 1rem; display: inline-block; }
.legal-card h2 { font-size: 1.8rem; margin-top: 3rem; }
.legal-card h3 { font-size: 1.3rem; margin-top: 1.5rem; }

/* Responsive */
@media (min-width: 768px) {
  .nav-links { display: flex; gap: 2.5rem; font-family: var(--font-heading); font-weight: 700; text-transform: uppercase; font-size: 0.9rem; }
  .form-grid { grid-template-columns: 1fr 1fr; align-items: center; }
  .feat-grid { grid-template-columns: 1fr 1fr; }
  .meth-grid { grid-template-columns: repeat(3, 1fr); }
  .cookie-wrap { flex-direction: row; justify-content: space-between; text-align: left; }
}