/* --- 🪐 ELITE CORE TOKENS & UTILITIES --- */
:root {
  --bg-main: #030712;
  --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.03) 0%, rgba(255, 255, 255, 0.01) 100%);
  --glass-border: linear-gradient(135deg, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0.03) 100%);
  --accent-cyan: #06b6d4;
  --accent-purple: #a78bfa;
  --accent-amber: #facc15;
  --text-primary: #f8fafc;
  --text-muted: #94a3b8;
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Basic Reset & Typography */
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Poppins', sans-serif; }

html { 
  scroll-behavior: smooth; 
  overflow-x: hidden; 
  scrollbar-width: none; /* Hides scrollbar in Firefox */
  -ms-overflow-style: none; /* Hides scrollbar in IE and Edge */
}

body {
  background-color: var(--bg-main);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Accessibility & Utils */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); border: 0; }
:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.6); border-radius: 8px; }
::selection { background: rgba(6, 182, 212, 0.3); color: #fff; }

/* Hide Custom Scrollbar for Chrome, Safari and Opera */
::-webkit-scrollbar { 
  display: none; 
  width: 0; 
  height: 0; 
}

/* Ambient Effects */
#particles { position: fixed; inset: 0; z-index: -2; pointer-events: none; }
.cursor-glow { position: fixed; width: 400px; height: 400px; background: radial-gradient(circle, rgba(6, 182, 212, 0.15) 0%, transparent 70%); border-radius: 50%; pointer-events: none; transform: translate(-50%, -50%); z-index: -1; will-change: transform; transition: opacity 0.3s ease; opacity: 0; }
body:hover .cursor-glow { opacity: 1; }
.blob { position: fixed; width: 600px; height: 600px; border-radius: 50%; filter: blur(80px); opacity: 0.12; z-index: -2; pointer-events: none; transform: translateZ(0); will-change: transform; transition: transform var(--transition-smooth); }
.blob-cyan { background: var(--accent-cyan); top: 15%; left: 5%; }
.blob-purple { background: var(--accent-purple); top: 55%; left: 65%; }
.blob-amber { background: var(--accent-amber); top: 30%; left: 55%; }

/* --- 🗺️ HIGH-END NAVIGATION --- */
.nav-container { display: flex; justify-content: space-between; align-items: center; padding: 24px 6vw; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); background: rgba(3, 7, 18, 0.2); border-bottom: 1px solid rgba(255,255,255,.03); position: sticky; top: 0; z-index: 100; transition: padding var(--transition-smooth), background var(--transition-smooth), box-shadow var(--transition-smooth); }
.nav-container.scrolled { padding: 16px 6vw; background: rgba(3, 7, 18, 0.6); box-shadow: 0 20px 40px rgba(0,0,0,0.4); }

.logo-container { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.navbar-logo-img { height: 34px; width: auto; filter: drop-shadow(0 4px 10px rgba(6,182,212,0.3)); transition: transform var(--transition-smooth); }
.logo-container:hover .navbar-logo-img { transform: scale(1.1) rotate(-4deg); }
.logo-text { font-size: 26px; font-weight: 700; background: linear-gradient(135deg, #ffffff, #cbd5e1); -webkit-background-clip: text; color: transparent; }

.desktop-menu { display: flex; gap: 40px; list-style: none; align-items: center; }
.nav-link { color: var(--text-muted); text-decoration: none; transition: color var(--transition-smooth), text-shadow var(--transition-smooth); font-weight: 500; font-size: 15px; position: relative; }
.nav-link::after { content: ''; position: absolute; width: 0; height: 2px; bottom: -6px; left: 0; background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple)); transition: width var(--transition-smooth); border-radius: 2px; }
.nav-link:hover::after { width: 100%; }
.nav-link:hover { color: #fff; text-shadow: 0 0 15px rgba(255,255,255,0.3); }

/* Mobile Nav */
.hamburger { display: none; background: none; border: none; color: var(--text-muted); cursor: pointer; z-index: 10000; transition: color 0.3s; }
.hamburger:hover { color: #fff; }
.mobile-backdrop { position: fixed; inset: 0; background: rgba(2,6,23,0.6); backdrop-filter: blur(8px); z-index: 9998; opacity: 0; pointer-events: none; transition: opacity 0.4s ease; }
.mobile-backdrop.show { opacity: 1; pointer-events: auto; }
.hamburger-menu { position: fixed; top: 90px; right: 30px; width: 280px; border-radius: 24px; background: rgba(7, 11, 27, 0.8); backdrop-filter: blur(25px); border: 1px solid rgba(255,255,255,0.08); box-shadow: 0 30px 60px rgba(0,0,0,0.6); display: flex; flex-direction: column; padding: 15px 0; opacity: 0; transform: translateY(-20px) scale(0.95); pointer-events: none; transition: opacity var(--transition-smooth), transform var(--transition-smooth); z-index: 9999; }
.hamburger-menu.show { opacity: 1; transform: translateY(0) scale(1); pointer-events: auto; }
.mobile-nav-link { color: var(--text-muted); font-weight: 500; text-decoration: none; padding: 18px 24px; transition: background var(--transition-smooth), color var(--transition-smooth); }
.mobile-nav-link:hover { color: #ffffff; background: rgba(255,255,255,0.04); }

/* --- ⚡ GLASSMORPHISM --- */
.glass { background: var(--glass-bg); border-radius: 28px; backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px); border: 1px solid rgba(255, 255, 255, 0.04); box-shadow: 0 20px 40px rgba(0,0,0,0.2); transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth); position: relative; overflow: hidden; transform: translateZ(0); will-change: transform; }
.glass::before { content: ''; position: absolute; inset: 0; border-radius: 28px; padding: 1px; background: var(--glass-border); -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; }
.glass:hover { box-shadow: 0 40px 80px rgba(6, 182, 212, 0.15); border-color: rgba(6, 182, 212, 0.2); }

/* --- 🏛️ HERO ARENA --- */
.hero { min-height: min(90vh,900px); display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 40px 20px; position: relative; }
.hero h1 { font-size: clamp(3rem, 6vw, 5rem); font-weight: 700; line-height: 1.1; background: linear-gradient(135deg, #ffffff 30%, #94a3b8 100%); -webkit-background-clip: text; color: transparent; max-width: 1000px; letter-spacing: -2px; clip-path: polygon(0 0, 100% 0, 100% 100%, 0% 100%); }
.hero h1 .accent { background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-amber)); -webkit-background-clip: text; color: transparent; display: inline-block; }
.highlight-float { animation: floatText 4s ease-in-out infinite; filter: drop-shadow(0 0 20px rgba(6,182,212,0.3)); }
@keyframes floatText { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.hero p { margin-top: 25px; font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--text-muted); max-width: 700px; font-weight: 300; line-height: 1.65; }
.hero .cta { display: flex; gap: 24px; margin-top: 45px; }

/* Buttons */
.btn-primary, .btn-secondary, .sponsor-btn, form button[type="submit"] { display: inline-flex; align-items: center; justify-content: center; padding: 18px 42px; border-radius: 100px; border: none; cursor: pointer; font-weight: 600; font-size: 16px; text-decoration: none; position: relative; overflow: hidden; transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease; will-change: transform; z-index: 1; }
.btn-primary { background: linear-gradient(135deg, var(--accent-cyan), #2563eb); color: white; box-shadow: 0 12px 30px rgba(6, 182, 212, 0.3); }
.btn-secondary { background: rgba(255, 255, 255, 0.02); color: white; border: 1px solid rgba(255,255,255,.08); backdrop-filter: blur(10px); }
.btn-primary:hover { box-shadow: 0 20px 40px rgba(6, 182, 212, 0.45); }
.btn-secondary:hover { background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.25); box-shadow: 0 15px 30px rgba(255,255,255,0.05); }
.sponsor-btn { background: rgba(255,255,255,0.02); color: white; border: 1px solid rgba(255,255,255,0.15); }
.sponsor-btn:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.4); box-shadow: 0 15px 30px rgba(0,0,0,0.3); }

/* Metrics */
.metrics-section { padding: 40px 20px 80px; max-width: 1200px; margin: 0 auto; }
.metrics-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 30px; }
.metric-glass-card { background: var(--glass-bg); border-radius: 24px; padding: 40px 30px; text-align: center; border: 1px solid rgba(255, 255, 255, 0.03); transition: transform var(--transition-smooth), border-color var(--transition-smooth); }
.metric-glass-card:hover { transform: translateY(-8px); border-color: rgba(6, 182, 212, 0.2); }
.metric-num { font-size: 3rem; font-weight: 800; line-height: 1; margin-bottom: 8px; }
.metric-lbl { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 1.5px; }
.text-cyan { background: linear-gradient(135deg, #06b6d4, #22d3ee); -webkit-background-clip: text; color: transparent; }
.text-purple { background: linear-gradient(135deg, #a78bfa, #c084fc); -webkit-background-clip: text; color: transparent; }
.text-amber { background: linear-gradient(135deg, #facc15, #fde047); -webkit-background-clip: text; color: transparent; }
.text-sky { background: linear-gradient(135deg, #38bdf8, #7dd3fc); -webkit-background-clip: text; color: transparent; }

/* Programs (STEP Card) */
.programs-section { padding: 120px 20px; text-align: center; }
.section-title { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 60px; font-weight: 700; background: linear-gradient(135deg, #fff, #94a3b8); -webkit-background-clip: text; color: transparent; }
.program-card { display: block; max-width: min(720px,92vw); margin: 0 auto; padding: clamp(24px,4vw,50px); text-align: left; text-decoration: none; transform-style: preserve-3d; will-change: transform; cursor: pointer; }
.program-card .card-content { transform: translateZ(30px); }
.program-card h3 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.program-card h3 .step-text { background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-amber)); -webkit-background-clip: text; color: transparent; }
.program-card h3 .arrow { color: rgba(255,255,255,0.2); transition: transform var(--transition-smooth), color var(--transition-smooth); font-weight: 300; }
.program-card:hover h3 .arrow { transform: translateX(15px); color: var(--accent-amber); filter: drop-shadow(0 0 10px var(--accent-amber)); }
.program-card p { font-size: 1.2rem; color: var(--text-muted); line-height: 1.75; font-weight: 300; }

/* Sponsors */
.sponsors { padding: 120px 20px; text-align: center; overflow: hidden; }
.sponsor-logos { display: flex; gap: 40px; justify-content: center; align-items: center; flex-wrap: wrap; margin-bottom: 50px; }
.logo-card { padding: 30px 45px; min-width: 180px; max-width: 260px; flex:1 1 220px; text-align: center; background: rgba(255,255,255,0.01); border: 1px solid rgba(255,255,255,0.03); border-radius: 24px; transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease; }
@media(min-width: 769px) {
  .logo-card:nth-child(odd) { transform: translateY(-10px); }
  .logo-card:nth-child(even) { transform: translateY(10px); }
}
.brand-zomato { font-weight: 900; font-style: italic; font-size: 34px; color: #ef4444; }
.brand-classmate { font-family: cursive; font-weight: 600; font-size: 30px; color: var(--accent-amber); }
.brand-nestle { font-family: serif; font-weight: 700; font-size: 32px; color: #3b82f6; }
.brand-sri { font-family: serif; font-weight: 600; font-size: 22px; color: #f97316; }

/* Contact Forms */
.contact { padding: 120px 20px; text-align: center; }
.contact-container { display: flex; gap: 50px; justify-content: center; flex-wrap: wrap; }
.form-container { width: 100%; min-width: 300px; max-width: 500px; padding: 45px; flex:1;}
.input-group { margin-bottom: 22px; }
input { width: 100%; padding: 16px 20px; border-radius: 16px; border: 1px solid rgba(255, 255, 255, 0.06); background: rgba(0,0,0,0.3); color: #fff; outline: none; transition: border-color var(--transition-smooth), background var(--transition-smooth), box-shadow var(--transition-smooth); font-size: 15px; }
input:focus { border-color: var(--accent-cyan); background: rgba(0,0,0,0.5); box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.15); }
form button[type="submit"] { width: 100%; background: linear-gradient(135deg, var(--accent-cyan), #2563eb); color: white; margin-top: 10px; }

.direct-contact { flex: 1; width: 100%; min-width: 300px; max-width: 500px; padding: 45px; display: flex; flex-direction: column; justify-content: center; }
.direct-contact h3 { font-size: 1.8rem; font-weight: 700; margin-bottom: 15px; }
.direct-contact p { color: var(--text-muted); line-height: 1.7; margin-bottom: 25px; }
.email-link { font-size: 1.5rem; font-weight: 600; color: var(--accent-cyan); text-decoration: none; transition: color 0.3s, text-shadow 0.3s; }
.email-link:hover { color: #fff; text-shadow: 0 0 15px rgba(6,182,212,0.5); }

/* Footer */
.site-footer { text-align: center; padding: 40px; background: rgba(3, 7, 18, 0.9); border-top: 1px solid rgba(255,255,255,0.03); color: var(--text-muted); margin-top: auto; }

/* Modal */
.modal-overlay { position: fixed; inset: 0; background: rgba(2, 4, 12, 0.85); backdrop-filter: blur(16px); z-index: 10000; display: flex; align-items: center; justify-content: center; opacity: 0; pointer-events: none; transition: opacity var(--transition-smooth); padding: 20px; }
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-content { width: 100%; max-width: 460px; padding: 50px; text-align: center; position: relative; transform: scale(0.95) translateY(20px); transition: transform var(--transition-smooth); }
.modal-overlay.active .modal-content { transform: scale(1) translateY(0); }
.close-modal { position: absolute; top: 20px; right: 25px; background: none; border: none; font-size: 34px; color: rgba(255,255,255,0.4); cursor: pointer; transition: color 0.3s, transform 0.3s; }
.close-modal:hover { color: white; transform: rotate(90deg); }

/* Toasts */
#toastContainer { position: fixed; bottom: 40px; right: 40px; z-index: 100000; display: flex; flex-direction: column; gap: 15px; pointer-events: none; }
.toast { padding: 18px 24px; border-radius: 16px; background: rgba(10, 15, 30, 0.95); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; gap: 12px; transform: translateX(120%); opacity: 0; transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.4s ease; box-shadow: 0 20px 40px rgba(0,0,0,0.5); }
.toast.show { transform: translateX(0); opacity: 1; }
.toast.success { border-left: 4px solid #4ade80; }
.toast.error { border-left: 4px solid #f87171; }
.spinner { display: none; width: 20px; height: 20px; border: 2px solid rgba(255,255,255,0.2); border-top-color: #fff; border-radius: 50%; animation: spin 0.8s linear infinite; margin-right: 10px; }
.loading .spinner { display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Animations - Scroll Reveal */
.fade-up-element { opacity: 0; transform: translateY(30px); transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1); will-change: opacity, transform; }
.fade-up-element.in-view { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }


/* ============================= */
/* RESPONSIVE DESIGN */
/* ============================= */

/* Large Tablets */
@media (max-width: 1024px){
  .nav-container{
      padding:20px 40px;
  }
  .nav-container.scrolled{
      padding:16px 40px;
  }
  .hero h1{
      font-size:4rem;
  }
  .hero p{
      max-width:650px;
  }
  .program-card{
      max-width:90%;
  }
  .contact-container{
      gap:30px;
  }
  .metrics-grid{
      grid-template-columns:repeat(2,1fr);
  }
  .sponsor-logos{
      gap:25px;
  }
  .logo-card{
      min-width:180px;
      padding:25px;
  }
}

/* Mobile */
@media (max-width:768px){
  html{
      font-size:15px;
  }
  body{
      overflow-x:hidden;
  }

  /* NAV */
  .nav-container{
      padding:18px;
  }
  .nav-container.scrolled{
      padding:15px 18px;
  }
  .desktop-menu{
      display:none;
  }
  .hamburger{
      display:block;
  }

  /* HERO */
  .hero{
      min-height:auto;
      padding:120px 20px 70px;
  }
  .hero h1{
      font-size:2.7rem;
      line-height:1.15;
      letter-spacing:-1px;
  }
  .hero p{
      font-size:1rem;
      margin-top:18px;
  }
  .hero .cta{
      flex-direction:column;
      width:100%;
      max-width:320px;
      gap:16px;
  }
  .btn-primary,
  .btn-secondary{
      width:100%;
  }

  /* METRICS */
  .metrics-section{
      padding:50px 20px;
  }
  .metrics-grid{
      grid-template-columns:1fr;
      gap:18px;
  }
  .metric-glass-card{
      padding:28px;
  }
  .metric-num{
      font-size:2.3rem;
  }

  /* PROGRAM */
  .programs-section{
    padding:70px 20px;
  }
  .program-card{
    padding:30px;
    max-width: 320px;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    margin: 0 auto;
  }
  .program-card h3{
    font-size:1.8rem;
    flex-direction:row;
    justify-content: space-between;
    align-items:center;
    gap:10px;
  }
  .program-card p{
    font-size:0.95rem;
  }

  /* SPONSORS */
  .sponsors{
      padding:70px 20px;
  }
  .sponsor-logos{
    display: flex;
    justify-content:center;
    align-items: center;
    flex-wrap: wrap;
    gap:18px;
  }
  .logo-card{
    flex: 0 1 150px;
    min-width:150px;
    max-width: 170px;
    padding:18px;
  }

  /* CONTACT */
  .contact{
    padding:70px 20px;
  }
  .contact-container{
    flex-direction:column;
    align-items:center;
    gap:25px;
  }
  .form-container,
  .direct-contact{
    width:100%;
    min-width: 200px;
    max-width: 400px;
    padding:30px 24px;
  }
  .email-link{
    font-size:1.1rem;
    word-break:break-word;
  }

  /* MODAL */
  .modal-overlay {
    padding: 40px 15px; 
    align-items: flex-start;
    overflow-y: auto;
  }
  
  .modal-content {
    padding: 30px 20px; 
    width: 100%;
    max-width: 320px; 
    margin: auto;
    border-radius: 20px; 
  }
  
  .modal-content h3 {
    font-size: 1.4rem; 
    margin-bottom: 18px;
  }
  
  .close-modal {
    top: 15px;
    right: 15px;
    font-size: 28px; 
  }

  #sponsorForm .input-group {
    margin-bottom: 14px; 
  }
  
  #sponsorForm input {
    padding: 12px 16px; 
    font-size: 13px; 
    border-radius: 12px;
  }
  
  #sponsorForm button {
    width: 100%;
    white-space: nowrap;
    padding: 12px 20px; 
    font-size: 14px; 
    margin-top: 5px;
  }

  /* BLOBS */
  .blob{
      width:320px;
      height:320px;
      filter:blur(80px);
  }

  /* CURSOR GLOW */
  .cursor-glow{
      display:none;
  }

  /* HAMBURGER MENU OVERFLOW & SIZING FIX */
  .hamburger-menu { 
    position: fixed; 
    top: 75px; 
    right: 18px; 
    width: 240px; 
    max-width: calc(100vw - 60px); 
    max-height: calc(100vh - 120px); 
    overflow-y: auto; 
    border-radius: 24px; 
    background: rgba(7, 11, 27, 0.8); 
    backdrop-filter: blur(25px); 
    border: 1px solid rgba(255,255,255,0.08); 
    box-shadow: 0 30px 60px rgba(0,0,0,0.6); 
    display: flex; 
    flex-direction: column; 
    padding: 15px 0; 
    opacity: 0; 
    transform: translateY(-20px) scale(0.95); 
    pointer-events: none; 
    transition: opacity var(--transition-smooth), transform var(--transition-smooth); 
    z-index: 9999; 
  }
  .mobile-nav-link {
    padding: 14px 20px;
    font-size: 14px;
  }

  .program-card:hover h3 .arrow { transform: translateX(10px); color: var(--accent-amber); filter: drop-shadow(0 0 10px var(--accent-amber)); }

}

/* Small Phones */
@media (max-width:480px){
  .navbar-logo-img{
      height:25px;
  }
  .logo-text{
      font-size:20px;
  }
  .hero{
      padding-top:100px;
  }
  .hero h1{
      font-size:2.2rem;
  }
  .section-title{
      font-size:1.8rem;
  }
  .metric-num{
      font-size:2rem;
  }
  
  /* PROGRAM */
  .program-card{
    padding:20px;
    max-width: 280px;
  }
  .program-card h3{
    font-size:1.5rem;
  }

  /* SPONSOR LOGOS */
  .logo-card{
      padding:20px;
  }
  .brand-zomato{
      font-size:28px;
  }
  .brand-classmate{
      font-size:24px;
  }
  .brand-nestle{
      font-size:26px;
  }
  .brand-sri{
      font-size:18px;
  }

  /* INPUTS */
  input{
      padding:14px 16px;
  }
  .btn-primary,
  .btn-secondary,
  .sponsor-btn,
  form button{
      padding:15px;
  }

  /* MODAL (Extra small form width fix) */
  .modal-overlay {
    padding: 20px 12px;
  }
  
  .modal-content {
    padding: 25px 16px;
    max-width: 290px; 
  }
  
  .modal-content h3 {
    font-size: 1.25rem;
    margin-bottom: 15px;
  }

  .close-modal {
    top: 10px;
    right: 12px;
    font-size: 24px;
  }

  /* HAMBURGER MENU EXTRA SMALL FIX */
  .hamburger-menu {
    width: 200px;
    top: 70px;
    right: 15px;
  }
  .mobile-nav-link {
    padding: 12px 16px;
    font-size: 13px;
  }

  footer{
      padding:25px;
  }
}