@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ============================================
   MODERN THEME — PhyLab 2.0
   Shared across all pages
   ============================================ */

:root {
  --primary: #003366;
  --primary-light: #0a4d8c;
  --primary-dark: #001f3f;
  --accent: #ff6347;
  --accent-hover: #ff4500;
  --accent-glow: rgba(255,99,71,0.4);
  --bg-dark: #0a0e1a;
  --bg-card: rgba(255,255,255,0.06);
  --glass: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.12);
  --text: #e8eaf0;
  --text-muted: #8892a4;
  --font: 'Inter', system-ui, sans-serif;
  --radius: 16px;
  --transition: 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============================================
   MODERN HEADER
   ============================================ */
.m-header {
  position: fixed; top:0; left:0; width:100%; z-index:1000;
  padding: 0 40px; height: 72px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(10,14,26,0.7);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom: 1px solid var(--glass-border);
  transition: var(--transition);
}
.m-header.scrolled {
  background: rgba(10,14,26,0.92);
  box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.m-header .logo a { display:flex; align-items:center; text-decoration:none; gap:10px; }
.m-header .logo img { height:42px; border-radius:10px; transition: var(--transition); }
.m-header .logo span {
  font-size:1.3rem; font-weight:700; color:#fff;
  background: linear-gradient(135deg, #fff, var(--accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.m-nav { display:flex; gap:6px; }
.m-nav a {
  color: var(--text-muted); text-decoration:none; font-size:0.88rem; font-weight:500;
  padding: 8px 16px; border-radius:10px; transition: var(--transition);
  position:relative;
}
.m-nav a:hover, .m-nav a.active { color:#fff; background: var(--glass); }
.m-nav a.active::after {
  content:''; position:absolute; bottom:4px; left:50%; transform:translateX(-50%);
  width:16px; height:2px; background:var(--accent); border-radius:2px;
}
.m-user a {
  color:#fff; text-decoration:none; font-size:0.85rem; font-weight:500;
  padding:8px 20px; border-radius:10px; border:1px solid var(--glass-border);
  transition: var(--transition); display:inline-block;
}
.m-user a:hover { background:var(--accent); border-color:var(--accent); }
.m-burger {
  display:none; background:none; border:none; color:#fff;
  font-size:1.4rem; cursor:pointer; padding:8px;
}

@media(max-width:768px) {
  .m-header { padding:0 16px; }
  .m-burger { display:block; }
  .m-nav {
    display:none; position:absolute; top:72px; left:0; width:100%;
    flex-direction:column; padding:16px;
    background:rgba(10,14,26,0.95); backdrop-filter:blur(20px);
    border-bottom:1px solid var(--glass-border);
  }
  .m-nav.open { display:flex; }
  .m-nav a { padding:12px 16px; }
  .m-user { display:none; }
}

/* ============================================
   MODERN FOOTER
   ============================================ */
.m-footer {
  background: linear-gradient(180deg, var(--bg-dark), #060810);
  border-top:1px solid var(--glass-border);
  padding:60px 40px 30px; text-align:center;
}
.m-footer .f-logo { margin-bottom:24px; }
.m-footer .f-logo img { height:48px; border-radius:12px; opacity:0.8; }
.m-footer .f-links { display:flex; justify-content:center; gap:24px; margin-bottom:24px; flex-wrap:wrap; }
.m-footer .f-links a {
  color:var(--text-muted); text-decoration:none; font-size:0.85rem;
  transition:var(--transition);
}
.m-footer .f-links a:hover { color:var(--accent); }
.m-footer .f-socials { display:flex; justify-content:center; gap:12px; margin-bottom:24px; }
.m-footer .f-socials a {
  width:40px; height:40px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  background:var(--glass); border:1px solid var(--glass-border);
  color:var(--text-muted); font-size:1rem; transition:var(--transition);
}
.m-footer .f-socials a:hover { background:var(--accent); color:#fff; transform:translateY(-3px); }
.m-footer .f-copy { color:var(--text-muted); font-size:0.78rem; opacity:0.6; }

/* ============================================
   HERO SECTION
   ============================================ */
.m-hero {
  min-height:100vh; display:flex; align-items:center; justify-content:center;
  text-align:center; position:relative; overflow:hidden;
  background: radial-gradient(ellipse at 50% 0%, var(--primary-dark) 0%, var(--bg-dark) 70%);
  padding: 120px 20px 80px;
}
.m-hero::before {
  content:''; position:absolute; inset:0;
  background:
    radial-gradient(600px circle at 30% 40%, rgba(0,51,102,0.3), transparent),
    radial-gradient(400px circle at 70% 60%, rgba(255,99,71,0.08), transparent);
  pointer-events:none;
}
.m-hero .hero-particles {
  position:absolute; inset:0; overflow:hidden; pointer-events:none;
}
.m-hero .particle {
  position:absolute; width:3px; height:3px; background:rgba(255,255,255,0.3);
  border-radius:50%; animation: particleFloat 8s infinite ease-in-out;
}
@keyframes particleFloat {
  0%,100% { transform:translateY(0) scale(1); opacity:0.3; }
  50% { transform:translateY(-60px) scale(1.5); opacity:0.8; }
}
.m-hero h1 {
  font-size:clamp(2.2rem,5vw,4rem); font-weight:800; line-height:1.1;
  margin-bottom:20px; position:relative; z-index:1;
  background:linear-gradient(135deg,#fff 0%,#c8d6e5 50%,var(--accent) 100%);
  -webkit-background-clip:text; -webkit-text-fill-color:transparent;
}
.m-hero p {
  font-size:clamp(1rem,2vw,1.25rem); color:var(--text-muted);
  max-width:540px; margin:0 auto 32px; position:relative; z-index:1;
}
.m-hero .hero-cta {
  display:inline-flex; align-items:center; gap:10px;
  background:linear-gradient(135deg,var(--accent),#e6533c);
  color:#fff; text-decoration:none; padding:14px 32px; border-radius:14px;
  font-weight:600; font-size:0.95rem; position:relative; z-index:1;
  transition:var(--transition);
  box-shadow: 0 8px 30px var(--accent-glow);
}
.m-hero .hero-cta:hover { transform:translateY(-3px) scale(1.03); box-shadow:0 12px 40px var(--accent-glow); }

/* ============================================
   SCROLL-ANIMATED SECTIONS
   ============================================ */
.m-section {
  padding:100px 20px; position:relative; overflow:hidden;
}
.m-section:nth-child(even) {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent);
}
.m-section .s-inner {
  max-width:1100px; margin:0 auto;
  display:flex; align-items:center; gap:60px; flex-wrap:wrap;
}
.m-section .s-inner.reverse { flex-direction:row-reverse; }
.m-section .s-text { flex:1; min-width:280px; }
.m-section .s-visual { flex:1; min-width:280px; display:flex; justify-content:center; }
.m-section h2 {
  font-size:clamp(1.6rem,3vw,2.2rem); font-weight:700; margin-bottom:16px;
  color:#fff; position:relative;
}
.m-section h2::after {
  content:''; display:block; width:40px; height:3px;
  background:var(--accent); margin-top:12px; border-radius:2px;
}
.m-section p { color:var(--text-muted); margin-bottom:16px; font-size:0.95rem; }
.m-section .btn-outline {
  display:inline-flex; align-items:center; gap:8px;
  color:var(--accent); text-decoration:none; font-weight:600; font-size:0.9rem;
  padding:10px 24px; border:1px solid var(--accent);
  border-radius:12px; transition:var(--transition);
}
.m-section .btn-outline:hover {
  background:var(--accent); color:#fff;
  box-shadow:0 6px 20px var(--accent-glow);
}

/* ============================================
   GLASS CARD
   ============================================ */
.glass-card {
  background:var(--bg-card); border:1px solid var(--glass-border);
  border-radius:var(--radius); padding:32px;
  backdrop-filter:blur(10px); transition:var(--transition);
}
.glass-card:hover {
  transform:translateY(-6px);
  border-color:rgba(255,99,71,0.3);
  box-shadow:0 16px 40px rgba(0,0,0,0.3);
}

/* ============================================
   STATS BAR
   ============================================ */
.m-stats {
  padding:60px 20px;
  background:linear-gradient(135deg, var(--primary-dark), var(--primary));
  border-top:1px solid var(--glass-border);
  border-bottom:1px solid var(--glass-border);
}
.m-stats .stats-grid {
  max-width:900px; margin:0 auto;
  display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:32px;
  text-align:center;
}
.m-stats .stat-item h3 {
  font-size:2.4rem; font-weight:800; color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.m-stats .stat-item p { color:var(--text-muted); font-size:0.85rem; margin-top:4px; }

/* ============================================
   SCROLL REVEAL ANIMATION CLASSES
   ============================================ */
.reveal {
  opacity:0; transform:translateY(40px);
  transition: opacity 0.8s var(--transition), transform 0.8s var(--transition);
}
.reveal.from-left { transform:translateX(-60px) rotateY(6deg); }
.reveal.from-right { transform:translateX(60px) rotateY(-6deg); }
.reveal.from-scale { transform:scale(0.9); }
.reveal.visible {
  opacity:1; transform:translateY(0) translateX(0) rotateY(0) scale(1);
}
.reveal-delay-1 { transition-delay:0.1s; }
.reveal-delay-2 { transition-delay:0.2s; }
.reveal-delay-3 { transition-delay:0.3s; }
.reveal-delay-4 { transition-delay:0.4s; }

/* ============================================
   3D VISUAL CONTAINERS
   ============================================ */
.vis-3d {
  width:240px; height:240px; perspective:800px;
  display:flex; align-items:center; justify-content:center;
}
.vis-3d .cube {
  width:120px; height:120px; position:relative;
  transform-style:preserve-3d;
  animation:cubeRotate 12s linear infinite;
}
.vis-3d .cube div {
  position:absolute; width:120px; height:120px;
  border:2px solid var(--accent); border-radius:8px;
  background:rgba(255,99,71,0.06);
}
.vis-3d .cube .front  { transform:translateZ(60px); }
.vis-3d .cube .back   { transform:rotateY(180deg) translateZ(60px); }
.vis-3d .cube .left   { transform:rotateY(-90deg) translateZ(60px); }
.vis-3d .cube .right  { transform:rotateY(90deg) translateZ(60px); }
.vis-3d .cube .top    { transform:rotateX(90deg) translateZ(60px); }
.vis-3d .cube .bottom { transform:rotateX(-90deg) translateZ(60px); }
@keyframes cubeRotate {
  0% { transform:rotateX(0) rotateY(0); }
  100% { transform:rotateX(360deg) rotateY(360deg); }
}

.vis-3d .orbit-ring {
  width:200px; height:200px; border:1px solid rgba(255,255,255,0.1);
  border-radius:50%; position:relative;
  animation:orbitSpin 10s linear infinite;
}
.vis-3d .orbit-dot {
  position:absolute; width:14px; height:14px;
  background:var(--accent); border-radius:50%; top:-7px; left:calc(50% - 7px);
  box-shadow:0 0 16px var(--accent-glow);
}
.vis-3d .orbit-center {
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width:40px; height:40px; background:var(--primary-light);
  border-radius:50%; border:2px solid rgba(255,255,255,0.2);
}
@keyframes orbitSpin { to { transform:rotate(360deg); } }

.vis-3d .pulse-rings { position:relative; width:160px; height:160px; }
.vis-3d .pulse-ring {
  position:absolute; inset:0; border:2px solid var(--accent);
  border-radius:50%; opacity:0; animation:pulseRing 3s infinite ease-out;
}
.vis-3d .pulse-ring:nth-child(2) { animation-delay:1s; }
.vis-3d .pulse-ring:nth-child(3) { animation-delay:2s; }
.vis-3d .pulse-core {
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  width:50px; height:50px; background:linear-gradient(135deg,var(--accent),#e6533c);
  border-radius:50%; display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:1.4rem; font-weight:700;
}
@keyframes pulseRing {
  0% { transform:scale(0.5); opacity:0.8; }
  100% { transform:scale(1.4); opacity:0; }
}

/* ============================================
   SIMULATION / BLOG CARDS GRID
   ============================================ */
.card-grid {
  display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:24px; max-width:1100px; margin:0 auto;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media(max-width:768px) {
  .m-section .s-inner { flex-direction:column!important; gap:32px; }
  .m-section { padding:60px 16px; }
  .m-stats .stats-grid { grid-template-columns:repeat(2,1fr); }
  .m-footer { padding:40px 16px 20px; }
}