/* --- Variables & Reset --- */
:root {
    --primary-blue: #004aad;
    --golden-yellow: #DAA520; /* GoldenRod */
    --white: #ffffff;
    --text-dark: #333;
    --bg-light: #f4f4f4;
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
}

body {
    background-color: var(--white);
    color: var(--text-dark);
    overflow-x: hidden;
}

/* --- Header --- */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 5%;
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo-container {
    cursor: pointer;
}

.main-logo {
    height: 60px;
}

.institute-identity {
    text-align: center;
    flex-grow: 1;
    margin: 0 20px;
}

.institute-name {
    color: var(--golden-yellow);
    font-size: 1.5rem;
    font-weight: 700;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}

.eiin {
    font-size: 0.9rem;
    color: var(--primary-blue);
    font-weight: 600;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

/* --- UPDATED NAV MENU ANIMATION --- */
.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    padding: 8px 15px; /* Added padding for the box effect */
    transition: color 0.3s;
    display: inline-block;
}

/* Create top and bottom borders */
.nav-link::before,
.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--golden-yellow);
    transition: width 0.3s ease-out;
}

.nav-link::before {
    top: 0;
    left: 0;
}

.nav-link::after {
    bottom: 0;
    right: 0;
}

/* Create left and right borders using a wrapper approach or pseudo manipulation.
   Simpler approach for box effect using box-shadow or more pseudos. 
   Here is a full box drawing animation effect: */
   
.nav-link:hover {
    color: var(--primary-blue);
}

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

/* Add side borders using box-shadow for a clean box effect on hover */
.nav-link:hover {
    box-shadow: inset 2px 0 0 0 var(--golden-yellow), inset -2px 0 0 0 var(--golden-yellow); 
    /* This creates the vertical sides appearing instantly or can be transitioned if desired.
       Let's stick to the top/bottom drawing lines as they are elegant, or a full border: */
}

/* Alternative: Full border "Outward" expansion */
.nav-link {
    border: 2px solid transparent; /* Reserve space */
}

.nav-link:hover {
    border-color: var(--golden-yellow);
    background-color: rgba(218, 165, 32, 0.05); /* Slight tint */
    border-radius: 4px;
}

/* Mobile Menu */
.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}
.bar {
    height: 3px;
    width: 25px;
    background-color: var(--text-dark);
    margin: 3px 0;
}

/* --- Notice Bar --- */
.notice-bar {
    background: var(--primary-blue);
    color: var(--white);
    overflow: hidden;
    white-space: nowrap;
    padding: 8px 0;
}

.marquee p {
    display: inline-block;
    padding-left: 100%;
    animation: marquee 15s linear infinite;
    font-weight: 600;
}

@keyframes marquee {
    0% { transform: translate(0, 0); }
    100% { transform: translate(-100%, 0); }
}

/* --- Hero Section --- */
.hero-section {
    position: relative;
    height: 80vh;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    overflow: hidden;
    background: #f9f9f9;
}

/* Animated Background Icons */
.tech-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.floating-icon {
    position: absolute;
    color: var(--golden-yellow);
    opacity: 0.6;
    font-size: 3rem;
    animation: float 6s ease-in-out infinite;
}

.floating-icon:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.floating-icon:nth-child(2) { top: 20%; right: 20%; animation-delay: 1s; }
.floating-icon:nth-child(3) { bottom: 15%; left: 20%; animation-delay: 2s; }
.floating-icon:nth-child(4) { bottom: 30%; right: 10%; animation-delay: 3s; }
.floating-icon:nth-child(5) { top: 50%; left: 50%; font-size: 5rem; opacity: 0.3; }
.floating-icon:nth-child(6) { top: 80%; left: 5%; animation-delay: 1.5s; }

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0); }
}

.hero-content {
    position: relative;
    z-index: 2;
    background: rgba(255, 255, 255, 0.85);
    padding: 40px;
    border-radius: 15px;
    border: 2px solid var(--golden-yellow);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.bangla-text {
    font-family: 'Noto Sans Bengali', sans-serif;
    font-size: 2rem;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.english-text {
    font-size: 1.5rem;
    color: var(--text-dark);
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.btn-primary {
    padding: 12px 30px;
    background: var(--golden-yellow);
    border: none;
    color: var(--white);
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    transition: transform 0.3s;
}

.btn-primary:hover {
    transform: scale(1.05);
    background: #c5931a;
}

/* --- Common Section Styles --- */
.section-padding {
    padding: 60px 5%;
}
.section-title {
    text-align: center;
    color: var(--primary-blue);
    margin-bottom: 40px;
    font-size: 2rem;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}
.section-title::after {
    content: '';
    display: block;
    width: 50%;
    height: 3px;
    background: var(--golden-yellow);
    margin: 10px auto 0;
}
.bg-light { background-color: var(--bg-light); }

/* --- Courses --- */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.course-card {
    background: var(--white);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    text-align: center;
    transition: var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.course-card.active {
    border: 2px solid var(--primary-blue);
    transform: scale(1.05);
}

.card-icon {
    font-size: 3rem;
    color: var(--golden-yellow);
    margin-bottom: 15px;
}

.affiliate {
    color: var(--primary-blue);
    font-weight: 600;
    margin: 10px 0;
}

.btn-sm {
    padding: 8px 15px;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.course-card.blur {
    filter: blur(2px);
    opacity: 0.7;
    pointer-events: none;
}

.overlay-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.7);
    color: var(--white);
    padding: 5px 10px;
    border-radius: 5px;
    font-weight: bold;
    width: 100%;
}

/* --- Notices --- */
.notice-list {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.notice-item {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
    transition: padding-left 0.3s;
}

.notice-item:hover {
    padding-left: 10px;
    background: #fdfdfd;
}

.notice-item a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
}

.notice-item .date {
    color: var(--golden-yellow);
    font-weight: bold;
    margin-right: 15px;
    min-width: 90px;
}

/* --- Gallery (Infinite Slide) --- */
.gallery-slider {
    overflow: hidden;
    white-space: nowrap;
    position: relative;
}

.gallery-track {
    display: flex;
    animation: slideRightToLeft 20s linear infinite;
}

.slide-img {
    min-width: 250px;
    height: 180px;
    background: #ddd;
    margin: 0 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 8px;
    color: var(--primary-blue);
}

.slide-img i { font-size: 3rem; margin-bottom: 10px; }

@keyframes slideRightToLeft {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); } 
}

/* --- Director --- */
.director-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 40px;
}

.director-img {
    flex: 1;
    text-align: center;
}
.director-img img {
    max-width: 300px;
    border-radius: 50%;
    border: 5px solid var(--golden-yellow);
}

.director-info {
    flex: 2;
}

.typing-text::after {
    content: '|';
    animation: blink 0.7s infinite;
}

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.points-list {
    list-style: none;
    margin-top: 15px;
}
.points-list li {
    margin-bottom: 10px;
    font-size: 1.1rem;
}
.points-list i {
    color: var(--golden-yellow);
    margin-right: 10px;
}

/* --- Address --- */
.address-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.branch-card {
    text-align: center;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

.map-container {
    margin-top: 15px;
    border: 2px solid var(--golden-yellow);
}

.highlight-note {
    margin-top: 10px;
    color: var(--primary-blue);
    font-weight: bold;
    font-style: italic;
}

/* --- Footer --- */
.footer-section {
    background: #222;
    color: #fff;
    padding: 50px 5% 10px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-content h3 {
    color: var(--golden-yellow);
    margin-bottom: 20px;
}

.contact-col a, .social-icons a {
    color: #fff;
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: 0.3s;
}

.contact-col a:hover, .social-icons a:hover {
    color: var(--golden-yellow);
}

.approval-item {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}
.approval-item i {
    font-size: 1.5rem;
    margin-right: 10px;
    color: var(--golden-yellow);
}

.social-icons {
    display: flex;
    gap: 15px;
}
.social-icons i { font-size: 1.8rem; }

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    font-size: 0.9rem;
}

.admin-login-link a { color: #666; text-decoration: none; font-size: 0.8rem;}

/* --- Modals --- */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.8);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    border: 2px solid var(--golden-yellow);
    position: relative;
    animation: fadeIn 0.4s;
}

.close-modal {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 30px;
    cursor: pointer;
}

.modal-actions {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.modal-btn {
    padding: 12px;
    text-decoration: none;
    color: white;
    border-radius: 5px;
    font-weight: bold;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.call-btn { background-color: var(--primary-blue); }
.wa-btn { background-color: #25D366; }

.online-process { margin-top: 20px; font-weight: bold; }
.blink { animation: blink 1s infinite; color: red; }

/* Admin Modal */
.admin-box input {
    display: block;
    width: 100%;
    margin-bottom: 10px;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
}
.robot-check {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

/* --- Scroll Animation Class --- */
.scroll-anim {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s ease-out;
}
.scroll-anim.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    header { flex-direction: column; padding: 10px; }
    .institute-identity { margin: 10px 0; }
    .menu-toggle { display: flex; position: absolute; right: 20px; top: 20px; }
    
    .nav-menu {
        display: none;
        width: 100%;
        text-align: center;
    }
    .nav-menu.active { display: block; }
    .nav-menu ul { flex-direction: column; gap: 10px; padding: 10px 0; }

    .director-container { flex-direction: column; }
    .footer-bottom { justify-content: center; gap: 10px; text-align: center; }
}