/* ========================================
   RootReef - Modern Website Stylesheet
   ======================================== */

:root {
  --color-primary: #0a6e78;
  --color-primary-light: #0d8a96;
  --color-primary-dark: #064e55;
  --color-secondary: #1a3a4a;
  --color-accent: #2dd4bf;
  --color-accent-light: #5eead4;
  --color-bg: #f8fafb;
  --color-bg-alt: #f0f4f5;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-light: #94a3b8;
  --color-border: #e2e8f0;
  --color-dark-bg: #0f1f2e;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --glow-primary: 0 0 20px rgba(10,110,120,0.15);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1,h2,h3,h4,h5,h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.25; color: var(--color-secondary); }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Navigation */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0; transition: all var(--transition); background: transparent;
}
.navbar.scrolled {
  background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px); box-shadow: var(--shadow-md); padding: 10px 0;
}
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 10px; z-index: 1001; }
.logo-img { width: 40px; height: 40px; border-radius: 8px; object-fit: cover; }
.logo-text {
  font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700;
  color: #fff; transition: color var(--transition);
}
.navbar.scrolled .logo-text { color: var(--color-secondary); }
.nav-menu { display: flex; align-items: center; gap: 8px; }
.nav-menu a {
  padding: 8px 14px; border-radius: var(--radius-sm); font-size: 0.9rem;
  font-weight: 500; color: rgba(255,255,255,0.85); transition: all var(--transition);
}
.nav-menu a:hover { color: #fff; background: rgba(255,255,255,0.1); }
.navbar.scrolled .nav-menu a { color: var(--color-text-secondary); }
.navbar.scrolled .nav-menu a:hover { color: var(--color-primary); background: rgba(10,110,120,0.06); }
.nav-menu a.active { color: var(--color-accent-light) !important; }
.navbar.scrolled .nav-menu a.active { color: var(--color-primary) !important; font-weight: 600; }

/* Language Switcher */
.lang-switcher {
  display: flex; align-items: center; gap: 6px; padding: 6px 14px;
  border: 1.5px solid rgba(255,255,255,0.35); border-radius: 20px;
  background: rgba(255,255,255,0.1); color: #fff; font-size: 0.85rem;
  font-weight: 600; font-family: var(--font-body); cursor: pointer; transition: all var(--transition);
}
.lang-switcher:hover { background: rgba(255,255,255,0.2); border-color: rgba(255,255,255,0.5); }
.navbar.scrolled .lang-switcher { border-color: var(--color-border); background: var(--color-bg-alt); color: var(--color-text); }
.navbar.scrolled .lang-switcher:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* Mobile Nav Toggle */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px; z-index: 1001;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all var(--transition); }
.navbar.scrolled .nav-toggle span { background: var(--color-text); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg-img { width: 100%; height: 100%; object-fit: cover; animation: kenBurns 20s ease-in-out infinite alternate; }
@keyframes kenBurns { 0% { transform: scale(1); } 100% { transform: scale(1.08); } }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,30,50,0.85) 0%, rgba(10,110,120,0.6) 50%, rgba(10,30,50,0.75) 100%);
}
.hero-content { position: relative; z-index: 1; text-align: center; max-width: 820px; padding: 120px 24px 80px; }
.hero-badge {
  display: inline-block; padding: 8px 20px; background: rgba(45,212,191,0.15);
  border: 1px solid rgba(45,212,191,0.3); border-radius: 30px; color: var(--color-accent-light);
  font-size: 0.85rem; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase;
  margin-bottom: 24px; animation: fadeInUp 0.8s ease;
}
.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.5rem); font-weight: 700; color: #fff;
  margin-bottom: 20px; line-height: 1.15; animation: fadeInUp 0.8s ease 0.1s both;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem); color: rgba(255,255,255,0.8);
  margin-bottom: 36px; line-height: 1.7; max-width: 650px; margin-left: auto;
  margin-right: auto; animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-actions {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 60px; animation: fadeInUp 0.8s ease 0.3s both;
}
.hero-stats { display: flex; justify-content: center; gap: 48px; animation: fadeInUp 0.8s ease 0.4s both; }
.stat { text-align: center; }
.stat-number { display: block; font-family: var(--font-heading); font-size: 2rem; font-weight: 700; color: var(--color-accent-light); text-shadow: 0 0 20px rgba(45,212,191,0.3); }
.stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.6); text-transform: uppercase; letter-spacing: 0.5px; }

.scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 1; animation: bounce 2s infinite; }
.scroll-arrow { width: 24px; height: 24px; border-right: 2px solid rgba(255,255,255,0.5); border-bottom: 2px solid rgba(255,255,255,0.5); transform: rotate(45deg); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 32px; border-radius: var(--radius-md); font-family: var(--font-body);
  font-size: 0.95rem; font-weight: 600; cursor: pointer; border: none; transition: all var(--transition);
  position: relative; overflow: hidden;
}
.btn::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.btn:hover::after { opacity: 1; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 4px 14px rgba(10,110,120,0.3); }
.btn-primary:hover { background: var(--color-primary-light); box-shadow: 0 8px 25px rgba(10,110,120,0.4); transform: translateY(-3px); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.4); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.7); transform: translateY(-2px); }
.btn-lg { padding: 18px 40px; font-size: 1.05rem; }
.btn-full { width: 100%; }

/* Section Styles */
.section { padding: 100px 0; }
.section-header { text-align: center; max-width: 680px; margin: 0 auto 64px; }
.section-tag {
  display: inline-block; padding: 6px 16px; background: rgba(10,110,120,0.08);
  color: var(--color-primary); border-radius: 20px; font-size: 0.8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.8px; margin-bottom: 16px;
}
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.5rem); margin-bottom: 16px; text-wrap: balance; }
.section-subtitle { font-size: 1.05rem; color: var(--color-text-secondary); line-height: 1.7; text-wrap: balance; }

.section-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.section-grid.reverse { direction: rtl; }
.section-grid.reverse > * { direction: ltr; }
.section-content { display: flex; flex-direction: column; }
.section-text { font-size: 1.02rem; color: var(--color-text-secondary); margin-bottom: 16px; line-height: 1.75; }
.section-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-xl); position: relative; }
.section-image img { width: 100%; height: 100%; object-fit: cover; min-height: 400px; transition: transform 0.8s cubic-bezier(0.25, 1, 0.5, 1); }
.section-image:hover img { transform: scale(1.04); }

/* Feature List */
.feature-list { display: flex; flex-direction: column; gap: 24px; margin-top: 32px; }
.feature-item { display: flex; gap: 16px; align-items: flex-start; }
.feature-icon {
  flex-shrink: 0; width: 44px; height: 44px; display: flex; align-items: center;
  justify-content: center; background: rgba(10,110,120,0.08); border-radius: var(--radius-md); color: var(--color-primary);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-item { transition: transform var(--transition); }
.feature-item:hover { transform: translateX(6px); }
.feature-item:hover .feature-icon { background: rgba(10,110,120,0.14); }
.feature-item h4 { font-size: 1rem; margin-bottom: 4px; }
.feature-item p { font-size: 0.9rem; color: var(--color-text-secondary); }

/* Technology / Layer Cards */
.technology { background: var(--color-bg-alt); }
.layers-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.layer-card {
  background: var(--color-surface); border-radius: var(--radius-lg); padding: 40px;
  box-shadow: var(--shadow-md); border: 1px solid var(--color-border);
  transition: all var(--transition); position: relative; overflow: hidden;
}
.layer-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0; transition: opacity var(--transition);
}
.layer-card:hover { box-shadow: var(--shadow-xl), var(--glow-primary); transform: translateY(-6px); border-color: rgba(10,110,120,0.15); }
.layer-card:hover::before { opacity: 1; }
.layer-number { font-family: var(--font-heading); font-size: 3rem; font-weight: 700; color: rgba(10,110,120,0.1); margin-bottom: 8px; }
.layer-title { font-size: 1.4rem; margin-bottom: 12px; }
.layer-desc { color: var(--color-text-secondary); margin-bottom: 24px; line-height: 1.7; }
.layer-specs { display: flex; flex-direction: column; gap: 12px; }
.layer-specs li { position: relative; padding-left: 24px; font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.6; }
.layer-specs li::before { content: ''; position: absolute; left: 0; top: 10px; width: 8px; height: 8px; border-radius: 50%; background: var(--color-accent); }

/* Cards Grid */
.cards-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.info-card {
  background: var(--color-surface); border-radius: var(--radius-lg); padding: 36px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition);
}
.info-card:hover { box-shadow: var(--shadow-lg), var(--glow-primary); transform: translateY(-5px); border-color: rgba(10,110,120,0.15); }
.card-icon {
  width: 52px; height: 52px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(10,110,120,0.1), rgba(45,212,191,0.1));
  border-radius: var(--radius-md); margin-bottom: 20px; color: var(--color-primary);
}
.card-icon svg { width: 26px; height: 26px; }
.info-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
.info-card p { font-size: 0.93rem; color: var(--color-text-secondary); line-height: 1.7; }

/* Ecology */
.ecology { background: var(--color-bg-alt); }
.eco-highlights { display: flex; flex-direction: column; gap: 28px; margin-top: 32px; }
.eco-item { display: flex; gap: 20px; align-items: flex-start; }
.eco-number {
  flex-shrink: 0; font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700;
  color: var(--color-primary); width: 48px; height: 48px; display: flex; align-items: center;
  justify-content: center; background: rgba(10,110,120,0.08); border-radius: var(--radius-md);
}
.eco-item { transition: transform var(--transition); }
.eco-item:hover { transform: translateX(6px); }
.eco-item:hover .eco-number { background: rgba(10,110,120,0.14); color: var(--color-primary-light); }
.eco-item h4 { font-size: 1rem; margin-bottom: 4px; }
.eco-item p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.6; }

/* Validation Timeline */
.timeline { position: relative; max-width: 700px; margin: 0 auto; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 15px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
}
.timeline-item { position: relative; margin-bottom: 36px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
  position: absolute; left: -33px; top: 6px; width: 14px; height: 14px;
  border-radius: 50%; background: var(--color-primary); border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 3px rgba(10,110,120,0.2);
}
.timeline-content {
  background: var(--color-surface); border-radius: var(--radius-md); padding: 24px;
  box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition);
}
.timeline-item:hover .timeline-content { box-shadow: var(--shadow-md); transform: translateX(6px); border-color: rgba(10,110,120,0.15); }
.timeline-item:hover .timeline-marker { background: var(--color-accent); box-shadow: 0 0 0 3px rgba(45,212,191,0.3); }
.timeline-content h4 { font-size: 1.05rem; margin-bottom: 8px; }
.timeline-content p { font-size: 0.92rem; color: var(--color-text-secondary); line-height: 1.6; }

/* Scalability */
.scalability { background: var(--color-bg-alt); }
.scale-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scale-card {
  text-align: center; background: var(--color-surface); border-radius: var(--radius-lg);
  padding: 40px 30px; box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); transition: all var(--transition);
}
.scale-card:hover { box-shadow: var(--shadow-lg), var(--glow-primary); transform: translateY(-6px); border-color: rgba(10,110,120,0.15); }
.scale-icon {
  width: 64px; height: 64px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(10,110,120,0.08), rgba(45,212,191,0.08));
  border-radius: var(--radius-lg); margin: 0 auto 20px; color: var(--color-primary);
}
.scale-icon svg { width: 28px; height: 28px; }
.scale-card h4 { font-size: 1.1rem; margin-bottom: 10px; }
.scale-card p { font-size: 0.9rem; color: var(--color-text-secondary); line-height: 1.65; }

/* About Partner */
.about-partner { margin-top: 56px; text-align: center; }
.about-partner h3 { font-size: 1.2rem; margin-bottom: 24px; color: var(--color-text); }
.partner-card {
  display: inline-flex; align-items: center; gap: 16px;
  padding: 20px 36px; background: #fff; border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.partner-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(10,110,120,0.10);
}
.partner-logo { max-width: 160px; max-height: 60px; object-fit: contain; }
.partner-name { font-size: 1rem; font-weight: 600; color: var(--color-text); }

/* Sponsor CTA */
.sponsor-cta { padding: 80px 0; }
.cta-box {
  text-align: center; background: linear-gradient(135deg, var(--color-secondary), var(--color-primary-dark));
  border-radius: var(--radius-xl); padding: 64px 48px; color: #fff;
}
.cta-box h2 { font-size: clamp(1.8rem, 3vw, 2.2rem); color: #fff; margin-bottom: 16px; }
.cta-box p { font-size: 1.05rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 32px; line-height: 1.7; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 48px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-item { display: flex; gap: 16px; align-items: center; }
.contact-icon {
  flex-shrink: 0; width: 48px; height: 48px; display: flex; align-items: center;
  justify-content: center; background: rgba(10,110,120,0.08); border-radius: var(--radius-md); color: var(--color-primary);
}
.contact-icon svg { width: 22px; height: 22px; }
.contact-item h4 { font-size: 0.95rem; margin-bottom: 2px; }
.contact-item p { font-size: 0.9rem; color: var(--color-text-secondary); }

.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-group { position: relative; }
.form-group input, .form-group textarea {
  width: 100%; padding: 16px 18px; border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md); font-family: var(--font-body); font-size: 0.95rem;
  color: var(--color-text); background: var(--color-surface); transition: all var(--transition); outline: none;
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(10,110,120,0.1); }
.form-group label {
  position: absolute; left: 18px; top: 16px; font-size: 0.95rem; color: var(--color-text-light);
  pointer-events: none; transition: all var(--transition); background: var(--color-surface); padding: 0;
}
.form-group input:focus ~ label, .form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label, .form-group textarea:not(:placeholder-shown) ~ label {
  top: -9px; left: 14px; font-size: 0.78rem; color: var(--color-primary); padding: 0 6px; font-weight: 500;
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* Footer */
.footer { background: var(--color-dark-bg); color: rgba(255,255,255,0.7); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo .logo-text { color: #fff; }
.footer-desc { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
.footer-links h4 { color: #fff; font-size: 0.95rem; margin-bottom: 20px; }
.footer-links ul { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: color var(--transition), transform var(--transition); display: inline-block; }
.footer-links a:hover { color: var(--color-accent-light); transform: translateX(4px); }
.footer-bottom { padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.4); }

/* Animations */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes bounce {
  0%,20%,50%,80%,100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(-10px); }
  60% { transform: translateX(-50%) translateY(-5px); }
}
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.8s cubic-bezier(0.25, 1, 0.5, 1), transform 0.8s cubic-bezier(0.25, 1, 0.5, 1); }
.reveal.reveal-left { transform: translateX(-60px) translateY(0); }
.reveal.reveal-right { transform: translateX(60px) translateY(0); }
.reveal.visible { opacity: 1; transform: translateY(0) translateX(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Responsive */
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; top: 0; right: -100%; width: 80%; max-width: 360px; height: 100vh;
    background: var(--color-surface); flex-direction: column; align-items: flex-start;
    padding: 100px 32px 32px; gap: 4px; box-shadow: var(--shadow-xl); transition: right var(--transition);
  }
  .nav-menu.active { right: 0; }
  .nav-menu a { color: var(--color-text) !important; font-size: 1.05rem; padding: 12px 16px; width: 100%; }
  .nav-menu a:hover { background: rgba(10,110,120,0.06) !important; color: var(--color-primary) !important; }
  .nav-menu .lang-switcher { margin-top: 16px; border-color: var(--color-border); color: var(--color-text); background: var(--color-bg-alt); }
  .section { padding: 72px 0; }
  .section-grid, .section-grid.reverse { grid-template-columns: 1fr; direction: ltr; gap: 40px; }
  .section-image { order: -1; }
  .section-image img { min-height: 280px; }
  .layers-grid, .cards-grid, .scale-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-stats { gap: 24px; }
  .stat-number { font-size: 1.5rem; }
  .cta-box { padding: 48px 28px; }
}
@media (max-width: 480px) {
  .hero-content { padding: 100px 16px 60px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .layer-card, .info-card { padding: 28px; }
  .timeline { padding-left: 32px; }
  .timeline::before { left: 11px; }
  .timeline-marker { left: -29px; }
}