/* =========================================
   EduTrust BD - Main Stylesheet
   Responsive, Glassmorphism, Modern UI
========================================= */

/* --- 1. Basic Resets --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-main);
    text-decoration: none;
    list-style: none;
}

body {
    background-color: var(--light-bg);
    color: var(--dark-blue);
    overflow-x: hidden;
    padding-bottom: 80px; 
}

/* --- 2. Header & Desktop Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 5%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: var(--glass-blur); 
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    color: var(--primary-blue);
}

.logo span {
    color: var(--dark-blue);
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-gray);
    font-weight: 500;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-blue);
}

.btn-get-started {
    background: var(--primary-blue);
    color: var(--white);
    padding: 0.6rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-get-started:hover {
    background: var(--primary-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
}

.mobile-menu-btn {
    display: none; 
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--dark-blue);
    cursor: pointer;
}

/* --- 3. Hero Section --- */
.hero-section {
    padding: 130px 5% 20px; /* গ্যাপ কমানোর জন্য প্যাডিং কমানো হয়েছে */
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    background: radial-gradient(circle at top, #e0e7ff 0%, var(--light-bg) 60%);
    /* min-height সরানো হয়েছে গ্যাপ কমানোর জন্য */
}

.hero-content {
    max-width: 800px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.badge {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-blue);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 700;
    color: var(--dark-blue);
    line-height: 1.2;
}

.hero-content h1 span {
    color: var(--primary-blue);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-gray);
}

.subtitle-bn {
    font-size: 1rem;
    color: #4b5563;
    font-weight: 400;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), #4f46e5);
    color: var(--white);
    padding: 1rem 2.5rem;
    border-radius: var(--radius-full);
    font-size: 1.1rem;
    font-weight: 600;
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    margin-top: 1rem;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 25px rgba(37, 99, 235, 0.4);
}

/* --- 4. Services Grid Section --- */
.services-section {
    padding: 10px 5% 50px; /* গ্যাপ কমানোর জন্য উপরের প্যাডিং কমানো হয়েছে */
    max-width: 1200px;
    margin: 0 auto;
}

.section-heading {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-blue);
}

.heading-line {
    width: 50px;
    height: 4px;
    background: var(--primary-blue);
    margin: 0.5rem auto 0;
    border-radius: var(--radius-sm);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.service-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 1.2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    transition: var(--transition-smooth);
    border: 1px solid rgba(0,0,0,0.02);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--glass-shadow);
    border-color: rgba(37, 99, 235, 0.1);
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
}

.ssc-icon { background: #Eef2ff; color: #4f46e5; }
.hsc-icon { background: #f5f3ff; color: #7c3aed; }
.nu-icon { background: #ecfdf5; color: #059669; }
.pu-icon { background: #fff7ed; color: #ea580c; }
.dip-icon { background: #f0fdfa; color: #0d9488; }
.oth-icon { background: #eff6ff; color: #2563eb; }

.card-text h3 {
    font-size: 1.1rem;
    color: var(--dark-blue);
    margin-bottom: 0.3rem;
}

.card-text p {
    font-size: 0.85rem;
    color: var(--text-gray);
}

.arrow-icon {
    margin-left: auto;
    color: var(--primary-blue);
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--transition-smooth);
}

.service-card:hover .arrow-icon {
    opacity: 1;
    transform: translateX(0);
}

/* --- 5. Trust Badges Section --- */
.trust-badges {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding: 20px 5% 60px;
    max-width: 1000px;
    margin: 0 auto;
}

.badge-item {
    background: var(--white);
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--dark-blue);
    box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.trust-icon-1 { color: #2563eb; }
.trust-icon-2 { color: #8b5cf6; }
.trust-icon-3 { color: #10b981; }
.trust-icon-4 { color: #6366f1; }

/* --- 6. Desktop WhatsApp Floating Button --- */
.whatsapp-float {
    position: fixed;
    bottom: 40px;
    right: 40px;
    background-color: #25D366;
    color: #FFF;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 35px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    z-index: 1001; /* অন্যান্য উপাদানের উপরে রাখার জন্য */
    transition: var(--transition-fast);
}

.whatsapp-float:hover {
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
    color: #FFF;
}

/* --- 7. Mobile Bottom Navigation --- */
.mobile-bottom-nav {
    display: none; 
}

/* =========================================
   Responsive Design (Media Queries)
========================================= */

@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    body {
        padding-bottom: 100px; 
    }

    .nav-links, .btn-get-started {
        display: none; 
    }
    
    .mobile-menu-btn {
        display: block; 
    }

    /* মোবাইলের ডিজাইনে কোনো পরিবর্তন না হয় সেজন্য আগের ভ্যালুগুলোই রাখা হলো */
    .hero-section {
        padding-top: 120px;
        padding-bottom: 50px;
        min-height: 60vh;
    }

    .services-section {
        padding: 50px 5%;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr); 
        gap: 1rem;
    }

    .service-card {
        flex-direction: column;
        text-align: center;
        padding: 1.2rem;
    }

    .arrow-icon {
        display: none; 
    }

    /* মোবাইলে হোয়াটসঅ্যাপ বাটন হাইড করা হলো */
    .whatsapp-float {
        display: none;
    }

    .trust-badges {
        gap: 1rem;
    }
    
    .badge-item {
        font-size: 0.8rem;
        padding: 0.6rem 1rem;
    }

    .mobile-bottom-nav {
        display: flex;
        justify-content: space-around;
        align-items: flex-end;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        background: var(--white);
        padding: 0.5rem 1rem 1rem;
        border-top-left-radius: var(--radius-lg);
        border-top-right-radius: var(--radius-lg);
        box-shadow: 0 -5px 20px rgba(0,0,0,0.08);
        z-index: 1000;
    }

    .nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.3rem;
        color: var(--text-gray);
        font-size: 0.75rem;
        font-weight: 500;
        transition: var(--transition-fast);
        margin-bottom: 0.2rem;
    }

    .nav-item.active {
        color: var(--primary-blue);
    }

    .nav-item i {
        font-size: 1.2rem;
    }

    .call-center-wrapper {
        margin-bottom: 0;
    }

    .call-btn {
        background: linear-gradient(135deg, var(--primary-blue), #4f46e5);
        color: var(--white);
        width: 65px;
        height: 65px;
        border-radius: 50%;
        display: flex;
        justify-content: center;
        align-items: center;
        font-size: 1.8rem;
        transform: translateY(-25px); 
        box-shadow: 0 10px 20px rgba(37, 99, 235, 0.4);
        border: 4px solid var(--light-bg);
    }
}

@media (max-width: 480px) {
    .services-grid {
        grid-template-columns: 1fr; 
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
}