/* CSS Design System for Orissa School of Engineering & Polytechnic */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Poppins:wght@500;600;700;800&display=swap');

:root {
    /* Color Palette */
    --primary: #0a2351;
    /* Dark Blue */
    --primary-light: #163a7a;
    --accent: #d4af37;
    /* Gold */
    --accent-hover: #b8962e;
    --maroon: #800000;
    /* Maroon */
    --maroon-hover: #a52a2a;
    --text-dark: #1f2937;
    --text-muted: #6b7280;
    --bg-light: #f9fafb;
    --white: #ffffff;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Layout */
    --container-max: 1200px;
    --header-height: 80px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

h1,
h2,
h3,
h4 {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 100px 0;
}

/* Header & Nav */
header {
    height: var(--header-height);
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-text {
    font-family: 'Poppins', sans-serif;
    font-weight: 800;
    font-size: 1.2rem;
    color: var(--primary);
    line-height: 1;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

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

.nav-link {
    font-weight: 500;
    color: var(--primary);
    position: relative;
}

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

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

.btn-apply {
    background: var(--maroon);
    color: var(--white);
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    box-shadow: 0 4px 14px 0 rgba(128, 0, 0, 0.3);
}

.btn-apply:hover {
    transform: translateY(-2px);
    background: var(--maroon-hover);
}

/* Hero Section */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(10, 35, 81, 0.6), rgba(10, 35, 81, 0.6)),
        url('./assets/campus_gate.jpg') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding-top: var(--header-height);
}

.hero-content {
    max-width: 900px;
    animation: fadeInUp 1s ease-out;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-shadow: 2px 4px 8px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    max-width: 700px;
    margin-inline: auto;
}

.btn-primary {
    background: var(--white);
    color: var(--primary);
    padding: 16px 36px;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    display: inline-block;
}

.btn-primary:hover {
    background: var(--accent);
    color: var(--primary);
    transform: scale(1.05);
}

/* About Section */
.about-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

.badge-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.badge-item {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #e5e7eb;
    transition: var(--transition);
}

.badge-item:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.badge-item i {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    display: block;
}

.badge-item span {
    font-weight: 600;
    font-size: 0.8rem;
    color: var(--primary);
}

/* Courses Section */
.courses-section {
    background: var(--bg-light);
}

.course-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.course-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 4px solid var(--maroon);
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.course-card h3 {
    margin-bottom: 1rem;
    color: var(--primary);
}

.course-seats {
    display: inline-block;
    background: #eef2ff;
    color: var(--primary-light);
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

/* Campus Section */
.location-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.location-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid #f3f4f6;
}

.location-info {
    padding: 2.5rem;
}

.location-info h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.map-placeholder {
    height: 250px;
    background: #eee;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--accent);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-details h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.contact-details p {
    color: var(--text-muted);
}

.contact-form {
    background: var(--white);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(10, 35, 81, 0.1);
}

.btn-submit {
    width: 100%;
    background: var(--primary);
    color: var(--white);
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-submit:hover {
    background: var(--primary-light);
}

/* Footer */
footer {
    background: var(--primary);
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 50px;
}

.footer-logo-text {
    font-family: 'Poppins', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: block;
}

.footer-about p {
    opacity: 0.7;
    margin-bottom: 2rem;
}

.footer-links h4 {
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.footer-link-item {
    margin-bottom: 0.75rem;
}

.footer-link-item a {
    opacity: 0.7;
}

.footer-link-item a:hover {
    opacity: 1;
    color: var(--accent);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    opacity: 0.6;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--maroon);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 992px) {

    .about-grid,
    .location-grid,
    .contact-container,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        text-align: center;
    }

    .nav-menu.active {
        display: flex;
    }

    .course-grid {
        grid-template-columns: 1fr;
    }

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

    .section-padding {
        padding: 60px 0;
    }
}