/* ============================================
   Injecta Landing Page - Styles
   ============================================ */

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

:root {
  --primary: #7C3AED;
  --primary-dark: #6D28D9;
  --primary-light: #A855F7;
  --accent: #EC4899;
  --bg: #FAFAFA;
  --bg-dark: #0F0A1A;
  --text: #1A1A2E;
  --text-muted: #6B7280;
  --text-light: #9CA3AF;
  --border: #E5E7EB;
  --card-bg: #FFFFFF;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
  --shadow-glow: 0 8px 30px rgba(124,58,237,0.25);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Gradient Text --- */
.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-sm { padding: 8px 20px; font-size: 14px; border-radius: var(--radius-sm); }
.btn-lg { padding: 16px 32px; font-size: 16px; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(124,58,237,0.35);
}

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

.btn-white {
  background: white;
  color: var(--primary);
  font-weight: 800;
}
.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(255,255,255,0.3);
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: all var(--transition);
  background: transparent;
}

.header.scrolled {
  background: rgba(250,250,250,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--primary); }

.nav-cta { display: flex; }

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.menu-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all var(--transition);
}

/* --- Hero --- */
.hero {
  position: relative;
  padding: 160px 0 80px;
  overflow: hidden;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float 15s ease-in-out infinite;
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -200px;
  right: -100px;
  opacity: 0.15;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: var(--accent);
  bottom: -100px;
  left: -100px;
  opacity: 0.1;
  animation-delay: -5s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: var(--primary-light);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.08;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(30px, -30px); }
  66% { transform: translate(-20px, 20px); }
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
}

.hero-badge { margin-bottom: 24px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,0.08);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid rgba(124,58,237,0.15);
}

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat strong {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.stat span {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}
.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
}

/* --- Peptides Bar --- */
.peptides-bar {
  padding: 40px 0;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.peptides-label {
  text-align: center;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.peptides-scroll {
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 10%, black 90%, transparent 100%);
}

.peptides-track {
  display: flex;
  gap: 12px;
  animation: scroll-left 30s linear infinite;
  width: max-content;
}

@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.peptide-tag {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,0.06);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid rgba(124,58,237,0.12);
}

/* --- Section Common --- */
.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 56px;
}

.section-badge {
  display: inline-flex;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,0.06);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- Features --- */
.features {
  padding: 100px 0;
}

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

.feature-card {
  padding: 28px 24px;
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(124,58,237,0.2);
}

.feature-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--icon-bg);
  color: var(--icon-color);
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* --- How it works --- */
.how-it-works {
  padding: 100px 0;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.steps {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  width: 100%;
}

.step-number {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  font-size: 20px;
  font-weight: 800;
  box-shadow: var(--shadow-glow);
}

.step-content h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  margin-top: 2px;
}

.step-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

.step-connector {
  width: 2px;
  height: 40px;
  background: linear-gradient(to bottom, var(--primary), rgba(124,58,237,0.1));
  margin: 8px 0 8px 25px;
}

/* --- Social Proof --- */
.social-proof {
  padding: 100px 0;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.proof-card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--card-bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.proof-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.proof-stars {
  font-size: 18px;
  color: #F59E0B;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.proof-card > p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  margin-bottom: 16px;
  font-style: italic;
}

.proof-author strong {
  display: block;
  font-size: 14px;
  font-weight: 700;
}

.proof-author span {
  font-size: 13px;
  color: var(--text-muted);
}

/* --- CTA --- */
.cta {
  padding: 40px 0 100px;
}

.cta-card {
  text-align: center;
  padding: 64px 32px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light), var(--accent));
  color: white;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
}

.cta-card::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
}

.cta-card h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-card p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.cta-card .btn {
  position: relative;
  z-index: 1;
}

/* --- FAQ --- */
.faq {
  padding: 100px 0;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  transition: color var(--transition);
}

.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary::after {
  content: '+';
  font-size: 22px;
  font-weight: 300;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  color: var(--primary);
}

.faq-answer {
  padding-bottom: 20px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --- Footer --- */
.footer {
  padding: 60px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand {
  max-width: 320px;
}

.footer-brand p {
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--primary); }

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-light);
}

.footer-disclaimer {
  font-style: italic;
}

/* --- Animations --- */
.animate-fade-up {
  opacity: 0;
  transform: translateY(24px);
  animation: fadeUp 0.7s ease forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.35s; }
.delay-4 { animation-delay: 0.5s; }

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Mobile Responsive --- */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .menu-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(250,250,250,0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
  }

  .nav-links.open a {
    font-size: 16px;
    padding: 8px 0;
  }

  .hero {
    padding: 120px 0 60px;
    min-height: auto;
  }

  .hero-title { font-size: 2rem; }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn { width: 100%; max-width: 320px; }

  .hero-stats {
    gap: 16px;
    margin-top: 40px;
  }

  .stat strong { font-size: 20px; }

  .features-grid { grid-template-columns: 1fr; gap: 12px; }

  .proof-grid { grid-template-columns: 1fr; }

  .footer-content { flex-direction: column; gap: 32px; }
  .footer-links { gap: 40px; }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta-card { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-title { font-size: 1.75rem; }
  .section-title { font-size: 1.5rem; }
}

/* --- Print --- */
@media print {
  .header, .hero-bg, .cta, .footer { display: none; }
  body { color: #000; background: #fff; }
}