/* HTML */
:root {
    --primary: #111827;
    --accent: #ef5108; 
    --accent-soft: #eff6ff;
    --bg-light: #f8fafc;
    --card-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
    --transition-standard: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
}

/* --- STYLE --- */
html { 
    scroll-behavior: smooth;
    font-family: var(--font-main);
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- UTILITIES --- */
.glass { 
    backdrop-filter: blur(12px); 
    background: rgba(255, 255, 255, 0.85);
    -webkit-backdrop-filter: blur(12px);
}

/* --- ANIMATIONS --- */
.card-hover {
    transition: var(--transition-standard);
    border: 1px solid #e2e8f0;
}

.card-hover:hover { 
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    border-color: var(--accent);
}

/* Intersection Classes */
.fade-in { 
    opacity: 0; 
    transform: translateY(30px); 
    transition: var(--transition-standard);
    will-change: transform, opacity;
}

.fade-in.show { 
    opacity: 1; 
    transform: translateY(0); 
}

/* --- NAVIGATION --- */
.nav-link { 
    position: relative;
    color: var(--primary);
    transition: color 0.3s ease;
}

.nav-link::after { 
    content: ""; 
    position: absolute; 
    left: 0; 
    bottom: -6px; 
    width: 0; 
    height: 2px; 
    background: var(--accent); 
    transition: width 0.3s ease; 
}

.nav-link:hover {
    color: var(--accent);
}

.nav-link:hover::after { 
    width: 100%; 
}

/* --- LOGO --- */
.logo-box { 
    width: 40px; 
    height: 40px; 
    background: var(--primary);
    color: white;
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-weight: 800; 
    border-radius: 8px;
    letter-spacing: -1px;
    transition: var(--transition-standard);
}

.logo-box:hover {
    background: var(--accent);
    transform: rotate(-5deg);
}

/* --- EDTECH --- */
.badge-tech {
    background: #eff6ff;
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    border: 1px solid #dbeafe;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: #f1f1f1;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}
@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); } 
}

.animate-marquee {
  display: flex;
  width: max-content;
  animation: marquee 30s linear infinite;
}

.animate-marquee:hover {
  animation-play-state: paused;
}

/* hover */
.grayscale {
  filter: grayscale(100%);
  opacity: 0.6;
}

.grayscale:hover {
  filter: grayscale(0%);
  opacity: 1;
}


/* Gradient fade edges */
.gradient-edge {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 80px;
  z-index: 10;
  pointer-events: none;
}

.gradient-edge.left {
  left: 0;
  background: linear-gradient(to right, white, transparent);
}

.gradient-edge.right {
  right: 0;
  background: linear-gradient(to left, white, transparent);
}

/* Marquee container */
.marquee {
  overflow: hidden;
  position: relative;
}

/* Track */
.marquee-track {
  display: flex;
  gap: 4rem;
  width: max-content;
  animation: scroll-fast 10s linear infinite;
}

/* loop */
.marquee-track::after {
  content: "";
  display: flex;
}

/* smooth animation */
@keyframes scroll-fast {
  0% {
    transform: translate3d(0, 0, 0);
  }
  100% {
    transform: translate3d(-50%, 0, 0);
  }
}

/* Tech items */
.tech-item {
  display: flex;
  align-items: center;
  gap: 10px;
  opacity: 0.65;
  font-size: 0.95rem;
  font-weight: 730;
  color: #6b7280;
  transition: all 0.4s ease;
  will-change: transform;
}

.tech-item i {
  font-size: 28px;
}

.tech-item img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

/* Hover */
.tech-item:hover {
  opacity: 1;
  transform: translateY(-4px) scale(1.05);
  color: #111827;
}

.marquee:hover .marquee-track {
  animation-play-state: paused;
}


/* Forms */
.form-input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
}

/* Buttons */
.btn-primary {
  background: var(--primary);
  color: white;
  padding: 12px 24px;
  border-radius: 999px;
  transition: 0.3s;
}
.btn-primary:hover {
  background: var(--accent);
}

.btn-secondary {
  border: 1px solid black;
  padding: 12px 24px;
  border-radius: 999px;
}
.btn-secondary:hover {
  background: var(--accent-soft);
}