/* ==========================================================================
   CSS Variables & System Setup
   ========================================================================== */
   :root {
    --primary: #0A2540;
    --primary-dark: #051525;
    --accent: #D32F2F;
    --text: #2D3748;
    --muted: #718096;
    --background: #FFFFFF;
    --surface: #F7FAFC;
    --border: #E2E8F0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --radius: 8px;
    --transition: 0.3s ease-in-out;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text);
    background-color: var(--background);
    line-height: 1.6;
    overflow-x: hidden;
}

.bangla-text {
    font-family: 'Noto Sans Bengali', sans-serif;
}

/* Typography */
h1, h2, h3, h4 {
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: 0.5rem;
}
p { margin-bottom: 1rem; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.bg-light { background-color: var(--surface); }

/* Layout Utilities */
.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}
.section-padding { padding: 5rem 0; }
.section-header { text-align: center; margin-bottom: 3rem; }
.divider { width: 60px; height: 3px; background: var(--accent); margin: 1rem auto; }

.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    border: none;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--background); color: var(--primary); font-weight: 600; }
.btn-secondary:hover { background: var(--surface); }

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--background);
    z-index: 1000;
    transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}
.logo { max-height: 50px; }
.nav-menu { display: flex; align-items: center; gap: 2rem; }
.nav-list { display: flex; list-style: none; gap: 1.5rem; }
.nav-link { font-weight: 500; }
.nav-link:hover, .nav-link.active { color: var(--accent); }
.hamburger { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.hamburger .bar { width: 25px; height: 3px; background: var(--primary); transition: var(--transition); }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    padding-top: 120px;
    padding-bottom: 4rem;
    background: linear-gradient(to right, var(--surface), var(--background));
    min-height: 80vh;
    display: flex;
    align-items: center;
}
.hero-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
}
.hero-content { flex: 1; }
.hero-title { font-size: clamp(2.5rem, 5vw, 4rem); color: var(--primary-dark); font-weight: 700; }
.hero-bangla { font-size: 1.5rem; color: var(--accent); font-weight: 600; margin-bottom: 1.5rem; }
.hero-desc { font-size: 1.1rem; color: var(--text); margin-bottom: 2rem; max-width: 500px; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-visual { flex: 1; display: flex; justify-content: center; }
.hero-svg { max-width: 100%; height: auto; }

/* SVG Animations */
@keyframes spin { 100% { transform: rotate(360deg); } }
@keyframes pulse { 50% { opacity: 0.5; } }
.spin-slow { transform-origin: center; animation: spin 20s linear infinite; }
.pulse-path { animation: pulse 3s ease-in-out infinite; }

/* ==========================================================================
   Cards & Content Sections
   ========================================================================== */
/* About */
.about-card {
    background: var(--background);
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    border-top: 4px solid var(--primary);
}
.location-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    color: var(--primary);
    background: var(--surface);
    padding: 1rem;
    border-radius: var(--radius);
}

/* Products */
.product-card {
    background: var(--background);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
}
.product-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.icon-wrapper { margin-bottom: 1rem; }
.product-notice { text-align: center; margin-top: 3rem; padding: 2rem; background: var(--surface); border-radius: var(--radius); }

/* Why Us */
.feature-card {
    padding: 1.5rem;
    border-left: 3px solid var(--accent);
    background: var(--background);
    box-shadow: var(--shadow-sm);
}

/* Training Section */
.training { background: var(--primary); }
.training-header { text-align: center; max-width: 700px; margin: 0 auto; }
.training-header h2 { color: white; margin-top: 1rem; }
.training-subtitle { color: rgba(255,255,255,0.8); }
.badge { display: inline-block; background: var(--accent); color: white; padding: 0.25rem 1rem; border-radius: 20px; font-size: 0.85rem; font-weight: 600; text-transform: uppercase; }
.training-card { background: rgba(255,255,255,0.1); padding: 1.5rem; border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.2); }
.training-card h4 { color: white; }
.training-card p { color: rgba(255,255,255,0.8); margin: 0; }
.training-cta { text-align: center; margin-top: 3rem; }

/* Safety */
.safety-container { display: flex; align-items: center; justify-content: space-between; gap: 3rem; }
.safety-content { flex: 1; }
.lead-bangla { font-size: 1.25rem; font-weight: 600; color: var(--accent); }
.safety-visual { flex: 1; display: flex; justify-content: center; }
.shield-svg { width: 100%; max-width: 300px; }

/* Contact Section */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: stretch; }
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
.info-item { display: flex; gap: 1rem; align-items: flex-start; }
.info-item p { margin: 0; color: var(--muted); }
.info-item a { color: var(--muted); }
.info-item a:hover { color: var(--primary); }
.contact-actions { display: flex; gap: 1rem; }
.location-card { background: var(--background); border-radius: var(--radius); box-shadow: var(--shadow-md); display: flex; align-items: center; justify-content: center; padding: 3rem; text-align: center; border-top: 4px solid var(--primary); }
.map-placeholder svg { margin-bottom: 1rem; }

/* ==========================================================================
   Footer
   ========================================================================== */
.footer { background: var(--primary-dark); color: white; padding-top: 4rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; padding-bottom: 3rem; }
.footer h3, .footer h4 { color: white; }
.tagline { color: var(--accent); font-weight: 500; font-style: italic; }
.text-muted { color: rgba(255,255,255,0.6); }
.footer-links ul { list-style: none; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { color: rgba(255,255,255,0.8); }
.footer-links a:hover { color: var(--accent); }
.footer-contact p { color: rgba(255,255,255,0.8); margin-bottom: 0.5rem; }
.footer-bottom { background: rgba(0,0,0,0.2); padding: 1.5rem 0; font-size: 0.9rem; color: rgba(255,255,255,0.6); }

/* ==========================================================================
   Animations & Responsive
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(30px); transition: all 0.8s ease-out; }
.reveal.active { opacity: 1; transform: translateY(0); }
.fade-right { transform: translateX(30px); }
.fade-right.active { transform: translateX(0); }
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
    .reveal, .spin-slow, .pulse-path, .fade-right, .product-card {
        transition: none !important;
        animation: none !important;
        transform: none !important;
        opacity: 1 !important;
    }
}

@media (max-width: 992px) {
    .hero-container, .safety-container, .contact-grid { flex-direction: column; text-align: center; }
    .hero-buttons { justify-content: center; }
    .hero-desc { margin: 0 auto 2rem auto; }
    .info-item { text-align: left; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: absolute;
        top: 80px;
        left: -100%;
        flex-direction: column;
        background: var(--background);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        padding: 2rem 0;
        gap: 1.5rem;
    }
    .nav-menu.active { left: 0; }
    .nav-list { flex-direction: column; }
    .hamburger { display: flex; }
    .hamburger.active .bar:nth-child(2) { opacity: 0; }
    .hamburger.active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .hamburger.active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
    
    .section-padding { padding: 3rem 0; }
    .about-card { padding: 1.5rem; }
    .location-badge { flex-direction: column; text-align: center; }
    
    .contact-actions { justify-content: center; flex-direction: column; }
    .contact-actions .btn { width: 100%; }
}

@media (max-width: 480px) {
    .hero-buttons { flex-direction: column; width: 100%; }
    .hero-buttons .btn { width: 100%; }
}