@charset "UTF-8";

/* =========================================
   Modern Tech Color Palette
========================================= */
:root {
    --bg-main: #F8FAFC;       /* Ultra-light slate for clean background */
    --bg-card: #FFFFFF;       /* Pure white for cards */
    --primary: #4F46E5;       /* Electric Indigo (Main Brand Color) */
    --primary-dark: #3730A3;  /* Deep Indigo */
    --accent: #0EA5E9;        /* Vibrant Sky Blue (For beautiful gradients) */
    --accent-dark: #0284C7;   /* Deep Sky Blue */
    --text-heading: #0F172A;  /* Rich Dark Slate for high contrast */
    --text-body: #475569;     /* Cool Slate for readability */
    --border-light: #E2E8F0;  /* Very soft border */
}

body {
    font-family: 'Noto Sans Bengali', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-body);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading);
}

/* =========================================
   Custom Scrollbar
========================================= */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #F1F5F9; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

/* =========================================
   Vibrant Clean Gradients
========================================= */
.text-gradient {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-mesh {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(at 10% 10%, rgba(79, 70, 229, 0.08) 0px, transparent 50%),
        radial-gradient(at 90% 90%, rgba(14, 165, 233, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(255, 255, 255, 0.8) 0px, transparent 100%);
}

.glass-panel {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

/* =========================================
   Components (Buttons & Cards)
========================================= */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.4);
    color: #FFFFFF !important;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px -5px rgba(79, 70, 229, 0.5);
}

.btn-secondary {
    background: #FFFFFF;
    border: 2px solid var(--border-light);
    color: var(--text-heading) !important;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary) !important;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px -5px rgba(15, 23, 42, 0.05);
}

.premium-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 1.5rem;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    z-index: 1;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.premium-card::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
    z-index: -1;
}

.premium-card:hover {
    transform: translateY(-8px);
    border-color: transparent;
    box-shadow: 0 25px 50px -12px rgba(79, 70, 229, 0.15);
}

.premium-card:hover::after {
    transform: scaleX(1);
}

.nav-link { 
    position: relative; 
    color: var(--text-body); 
    font-weight: 600; 
    transition: color 0.3s;
}

.nav-link::after {
    content: '';
    position: absolute; 
    bottom: -4px; 
    left: 0;
    width: 0; 
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after { width: 100%; }
.nav-link:hover,
.nav-link.active { color: var(--primary); }

.stat-number {
    font-family: 'Anek Bangla', sans-serif;
    font-weight: 800;
    font-size: 3.5rem;
    color: var(--primary);
}

/* =========================================
   Animations
========================================= */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.active { 
    opacity: 1; 
    transform: translateY(0); 
}

.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; }

/* Clean Image Wrapper */
.founder-image-wrapper { 
    position: relative; 
    padding: 4px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 1.25rem;
}
.founder-image-wrapper > div {
    background: white;
    border-radius: 1rem;
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}