:root {
    --primary: #275df5;
    --primary-hover: #1e4bb5;
    --accent: #ff4e2e;
    --background: #f8f9ff;
    --foreground: #1f1f1f;
    --secondary: #717b9e;
    --card: #ffffff;
    --card-border: #e2e8f0;
    --glass: rgba(255, 255, 255, 0.95);
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 6rem;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography */
h1, h2, h3, h4 {
    line-height: 1.1;
    font-weight: 800;
}

.primary-text {
    color: var(--primary);
}

.gradient-text {
    background: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.75rem;
    border-radius: 100px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
    font-family: inherit;
    gap: 0.5rem;
    font-size: 0.875rem;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary);
    color: white !important;
    border: 1px solid var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

.btn-outline {
    background-color: white;
    color: var(--primary) !important;
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background-color: #f3f6ff;
}

.btn-lg {
    padding: 0.8rem 2.5rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.4rem 1.25rem;
    font-size: 0.8rem;
}

/* Navbar */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: white;
    padding: 1rem 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

nav.scrolled {
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--foreground);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    transition: transform 0.3s ease;
}

nav.scrolled .logo {
    transform: scale(0.95);
}

.logo-icon {
    background-color: var(--primary);
    color: white;
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.875rem;
    transition: all 0.3s ease;
}

nav.scrolled .logo-icon {
    width: 2.25rem;
    height: 2.25rem;
}

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

.nav-links a {
    text-decoration: none;
    color: #444;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color 0.2s;
}

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

.nav-divider {
    width: 1px;
    height: 24px;
    background: #e2e8f0;
    margin: 0 0.5rem;
}

.btn-register {
    background-color: var(--accent) !important;
    color: white !important;
    border: 1px solid var(--accent) !important;
}

.btn-register:hover {
    background-color: #e63e1f !important;
}

.for-employers {
    color: #444;
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-links a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.nav-links a:not(.btn):hover::after,
.nav-links a.active:not(.btn)::after {
    width: 100%;
}

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

.mobile-toggle {
    display: none;
    background: #f1f5f9;
    border: none;
    cursor: pointer;
    width: 3rem;
    height: 3rem;
    border-radius: 1rem;
    align-items: center;
    justify-content: center;
    color: var(--foreground);
    transition: all 0.2s;
}

.mobile-toggle:hover {
    background: #e2e8f0;
}

/* Hero */
.hero {
    position: relative;
    padding: 8rem 0 4rem;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 40%;
    height: 60%;
    background: #dbeafe;
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 40%;
    height: 60%;
    background: #e0e7ff;
}

.hero-content h1 {
    font-size: 3.5rem;
    max-width: 900px;
    margin: 0 auto 1.5rem;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: #444;
}

.hero-content p {
    font-size: 1.25rem;
    color: #888;
    max-width: 800px;
    margin: 0 auto 3rem;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #eff6ff;
    color: var(--primary);
    padding: 0.5rem 1.25rem;
    border-radius: 2rem;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 2rem;
    border: 1px solid #dbeafe;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}


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

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--primary);
    color: white;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-hover);
    transform: translateY(-5px);
}

/* Features */
.features {
    padding: 4rem 0;
    background: #f8fafc;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
}

.feature-card {
    background: white;
    padding: 3rem;
    border-radius: 2.5rem;
    border: 1px solid var(--card-border);
}

.feature-icon {
    width: 3.5rem;
    height: 3.5rem;
    background: #eff6ff;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1.25rem;
    margin-bottom: 2rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.feature-card p {
    color: var(--secondary);
}

/* Opportunities */
.opportunities {
    padding: 4rem 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    color: var(--secondary);
}

.search-box {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 4rem;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    border: 1px solid #eef2ff;
}

.search-input-group {
    display: flex;
    flex-grow: 1;
    align-items: center;
    padding: 0 1.5rem;
    border-right: 1px solid #e2e8f0;
}

.search-input-group:last-of-type {
    border-right: none;
}

.search-input-group i {
    color: #94a3b8;
    margin-right: 0.75rem;
}

.search-input-group input {
    border: none;
    padding: 0.75rem 0;
    width: 100%;
    font-family: inherit;
    font-size: 0.9375rem;
    color: #1f1f1f;
}

.search-input-group input:focus {
    outline: none;
}

.search-box .btn-search {
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem 2.5rem;
    border-radius: 3rem;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
    margin-left: 0.5rem;
}

.search-box .btn-search:hover {
    background: var(--primary-hover);
}

.filters {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 0.625rem;
    background: #f1f5f9;
    color: var(--secondary);
    border: 1px solid transparent;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn.active, .filter-btn:hover {
    background: white;
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.05);
}

.opportunities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

/* Cards */
.card {
    background: white;
    border-radius: 1rem;
    border: 1px solid #e2e8f0;
    padding: 1.5rem;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: inherit;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.card h3 {
    font-size: 1.125rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.card-company {
    color: #444;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.card-category {
    font-size: 0.7rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
    padding: 0.4rem 1rem;
    border-radius: 2rem;
    display: inline-block;
}

.card-trending {
    position: absolute;
    top: 2.5rem;
    right: 2.5rem;
    color: var(--accent);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
}

.cat-job { background: #dbeafe; color: #1e40af; }
.cat-hackathon { background: #fef3c7; color: #92400e; }
.cat-internship { background: #d1fae5; color: #065f46; }
.cat-event { background: #f3e8ff; color: #6b21a8; }
.cat-program { background: #fee2e2; color: #991b1b; }

.card-company-header {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.company-logo {
    width: 48px;
    height: 48px;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
}

.company-logo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.company-logo i {
    color: #94a3b8;
}

.company-info {
    flex: 1;
}

.company-info h3 {
    margin: 0;
    font-size: 1.125rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-company {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.card-desc {
    color: #64748b;
    font-size: 0.9375rem;
    margin-bottom: 2rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid #f8fafc;
}

.card-meta {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    font-size: 0.8rem;
    color: #94a3b8;
    font-weight: 600;
}

.card-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.verified-badge {
    color: #10b981;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

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

/* Newsletter */
.newsletter {
    padding: 3rem 0 5rem;
}

.newsletter-card {
    background: var(--primary);
    border-radius: 3rem;
    padding: 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.newsletter-card::after {
    content: '';
    position: absolute;
    bottom: -5rem;
    right: -5rem;
    width: 20rem;
    height: 20rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
}

.newsletter-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.newsletter-content p {
    color: #dbeafe;
    font-size: 1.125rem;
}

.newsletter-form {
    display: flex;
    gap: 0.75rem;
    background: white;
    padding: 0.5rem;
    border-radius: 1.5rem;
    width: 100%;
    max-width: 450px;
}

.newsletter-form input {
    flex-grow: 1;
    border: none;
    padding: 0 1rem;
    font-family: inherit;
    font-size: 0.9375rem;
}

.newsletter-form input:focus {
    outline: none;
}

/* Footer */
footer {
    background: #0f172a;
    color: white;
    padding: 6rem 0 2rem;
}

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

.footer-brand p {
    color: #94a3b8;
    margin-top: 1.5rem;
    max-width: 300px;
}

.footer-brand .logo {
    color: white;
}

.footer-links h4, .footer-social h4 {
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.footer-links a {
    display: block;
    color: #94a3b8;
    text-decoration: none;
    margin-bottom: 0.75rem;
    font-weight: 500;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.social-icons {
    display: flex;
    gap: 1rem;
}

.social-icons a {
    color: #94a3b8;
    transition: color 0.2s;
}

.social-icons a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #1e293b;
    padding-top: 2rem;
    text-align: center;
    color: #64748b;
    font-size: 0.875rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    border-radius: 2.5rem;
    position: relative;
    padding: 4rem;
    overflow-y: auto;
}

.close-modal {
    position: absolute;
    top: 2rem;
    right: 2.5rem;
    background: #f1f5f9;
    border: none;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.close-modal:hover {
    background: #e2e8f0;
    transform: scale(1.1);
}

.modal-header {
    margin-bottom: 2.5rem;
}

.modal-body h3 {
    margin: 2rem 0 1rem;
}

.modal-body p {
    color: #475569;
    margin-bottom: 1rem;
}

.loading-state {
    text-align: center;
    padding: 4rem 0;
    grid-column: 1 / -1;
}

.spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid #f1f5f9;
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-content h1 { font-size: 3rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .newsletter-card { flex-direction: column; text-align: center; gap: 2rem; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-container { padding: 0 1.5rem; }
    .nav-left { gap: 1rem; }
    .nav-links { 
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--card-border);
        transform: translateY(-150%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 100;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }
    .nav-links.active {
        transform: translateY(0);
    }
    
    .nav-right { display: none; } /* Hide right part on mobile for simplicity or move to menu */
    .mobile-toggle { display: flex; }

    .hero { padding: 6rem 0 3rem; }
    .hero-content h1 { font-size: 2.25rem; }
    .hero-content p { font-size: 1rem; margin-bottom: 2rem; }

    .search-box {
        flex-direction: column;
        border-radius: 1.5rem;
        padding: 1rem;
        gap: 0.5rem;
    }
    .search-input-group {
        border-right: none;
        border-bottom: 1px solid #f1f5f9;
        padding: 0.75rem 0.5rem;
        width: 100%;
    }
    .search-input-group:last-of-type { border-bottom: none; }
    .btn-search {
        width: 100%;
        margin-left: 0 !important;
        margin-top: 0.5rem;
        border-radius: 1rem !important;
    }

    .filters {
        overflow-x: auto;
        padding-bottom: 0.5rem;
        margin-bottom: 2rem;
    }
    .filter-btn { white-space: nowrap; }

    .features-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    .feature-card { padding: 2rem; }

    .opportunities-grid { grid-template-columns: 1fr; }
    
    .footer-grid { grid-template-columns: 1fr; gap: 3rem; }
    
    .modal { padding: 1rem; }
    .modal-content { padding: 2rem 1.5rem; border-radius: 1.5rem; }
    .close-modal { top: 1rem; right: 1rem; width: 2.5rem; height: 2.5rem; }
    
    /* Admin Mobile Fixes */
    .admin-container { padding: 1.5rem; margin: 5rem 1rem; }
    .form-row { grid-template-columns: 1fr; gap: 0; }
    .posts-table { display: block; overflow-x: auto; }

    .mobile-only { display: block !important; }
}

.mobile-only { display: none; }

@media (max-width: 480px) {
    .hero-content h1 { font-size: 1.875rem; }
    .newsletter-card { padding: 2.5rem 1.5rem; border-radius: 2rem; }
    .newsletter-content h2 { font-size: 1.75rem; }
    .newsletter-form { flex-direction: column; background: transparent; padding: 0; gap: 1rem; }
    .newsletter-form input { background: white; padding: 1rem; border-radius: 1rem; }
    .newsletter-form .btn { width: 100%; border-radius: 1rem; }
}