/* Base Styles & Variables */
:root {
    --primary-color: #3a57e8;
    --secondary-color: #6c757d;
    --dark-bg: #151b2c;
    --darker-bg: #111625;
    --light-text: #f8f9fa;
    --gray-text: #c2c7d0;
    --card-bg: #1e2640;
    --transition: all 0.3s ease;
    --navbar-bg: rgba(65, 77, 111, 0.85);
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: 1rem;
}

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

a:hover {
    color: #2845d1;
}

.section-title {
    position: relative;
    margin-bottom: 2.5rem;
    font-size: 2.5rem;
    font-weight: 700;
}

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

section {
    padding: 80px 0;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: #2845d1;
    border-color: #2845d1;
}

.btn-outline-light {
    color: var(--light-text);
    border-color: var(--light-text);
}

.btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Navigation Styles */
.navbar {
    padding: 1rem 0;
    background-color: var(--navbar-bg);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--light-text);
}

.nav-link {
    color: var(--light-text) !important;
    margin: 0 0.5rem;
    position: relative;
    font-weight: 500;
    transition: var(--transition);
}

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

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

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

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-color: var(--darker-bg);
    position: relative;
    overflow: hidden;
    padding: 0;
}

.cta-buttons a {
    position: relative;
    z-index: 2;
}

.hero-section:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(58, 87, 232, 0.3), transparent 50%);
}

.hero-section h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-section .subtitle {
    font-size: 1.5rem;
    color: var(--gray-text);
    margin-bottom: 1.5rem;
    font-weight: 500;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-section .lead {
    margin-bottom: 2rem;
    font-size: 1.1rem;
    color: var(--gray-text);
}

.hero-image {
    position: relative;
}

.hero-image img {
    border-radius: 20px;
    box-shadow:
        0 20px 40px rgba(0, 0, 0, 0.3),
        0 0 50px rgba(58, 87, 232, 0.5),
        0 0 80px rgba(58, 87, 232, 0.3);
    max-width: 80%;
}

.social-icons {
    position: absolute;
    display: flex;
    flex-direction: column;
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    gap: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--card-bg);
    color: var(--light-text);
    transition: var(--transition);
}

.social-icon:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-5px);
}

/* Services Section */
.services-section {
    background-color: var(--dark-bg);
}

.service-card {
    background-color: var(--card-bg);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    height: 100%;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.service-icon {
    margin-bottom: 1.5rem;
    font-size: 2rem;
    color: var(--primary-color);
}

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

.service-card ul {
    list-style-type: none;
    padding-left: 0;
}

.service-card li {
    margin-bottom: 0.5rem;
    color: var(--gray-text);
    position: relative;
    padding-left: 1.5rem;
}

.service-card li:before {
    content: '•';
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Skills Section */
.skills-section {
    background-color: var(--darker-bg);
}

.skills-container {
    margin-top: 1rem;
}

.skill-item {
    margin-bottom: 2rem;
}

.skill-name {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.progress {
    height: 10px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    overflow: hidden;
}

.progress-bar {
    background-color: var(--primary-color);
    border-radius: 50px;
}

.expertise-banner {
    transition: var(--transition);
    cursor: default;
}

.expertise-banner:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.stats-row {
    margin-top: 5rem;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.stat-item p {
    font-size: 1.1rem;
    color: var(--gray-text);
}

/* Projects Section */
.projects-section {
    background-color: var(--darker-bg);
}

.project-filters {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: none;
    border: none;
    color: var(--gray-text);
    margin: 0 0.5rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 50px;
}

.filter-btn.active,
.filter-btn:hover {
    color: var(--light-text);
    background-color: var(--primary-color);
}

.project-container {
    transition: opacity 0.5s ease-in-out;
}

.project-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 2rem;
    transition: var(--transition);
    height: 100%;
    background-color: var(--card-bg);
    display: flex;
    flex-direction: column;
}

.project-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background-color: var(--darker-bg);
}

.project-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.project-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    width: fit-content;
}

.project-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--light-text);
}

.project-description {
    color: var(--gray-text);
    font-size: 0.9rem;
    flex-grow: 1;
    margin-bottom: 1rem;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
    margin-top: auto;
}

.project-link:hover {
    color: #2845d1;
    gap: 0.75rem;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.project-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.proj-nav-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--card-bg);
    color: var(--light-text);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.proj-nav-btn:hover:not(:disabled) {
    background-color: var(--primary-color);
    transform: scale(1.1);
}

.proj-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Certificates Section */
.certificates-section {
    background-color: var(--darker-bg);
}

.certificate-filters {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.cert-filter-btn {
    background: none;
    border: none;
    color: var(--gray-text);
    margin: 0 0.5rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    border-radius: 50px;
}

.cert-filter-btn.active,
.cert-filter-btn:hover {
    color: var(--light-text);
    background-color: var(--primary-color);
}

.certificate-container {
    transition: opacity 0.5s ease-in-out;
}

.certificate-card {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    margin-bottom: 2rem;
    transition: var(--transition);
    height: 100%;
    background-color: var(--card-bg);
    display: flex;
    flex-direction: column;
}

.certificate-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    background-color: var(--darker-bg);
}

.certificate-content {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.certificate-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    width: fit-content;
}

.certificate-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--light-text);
}

.certificate-issuer {
    color: var(--gray-text);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.certificate-date {
    color: var(--gray-text);
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.certificate-description {
    color: var(--gray-text);
    font-size: 0.9rem;
    flex-grow: 1;
    margin-bottom: 1rem;
}

.certificate-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
    margin-top: auto;
}

.certificate-link:hover {
    color: #2845d1;
    gap: 0.75rem;
}

.certificate-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.certificate-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.cert-nav-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--card-bg);
    color: var(--light-text);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.cert-nav-btn:hover:not(:disabled) {
    background-color: var(--primary-color);
    transform: scale(1.1);
}

.cert-nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Contact Section */
.contact-section {
    background-color: var(--dark-bg);
}

.contact-item {
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.contact-item i {
    width: 40px;
    height: 40px;
    background-color: var(--card-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    color: var(--primary-color);
}

.contact-item a {
    color: var(--light-text);
}

.contact-form {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 15px;
}

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

.form-group label {
    color: var(--light-text);
    font-weight: 500;
}

.form-control {
    background-color: var(--darker-bg);
    border: none;
    border-radius: 5px;
    padding: 0.75rem 1rem;
    color: var(--light-text);
}

.form-control::placeholder {
    color: var(--gray-text);
}

.form-control:focus {
    background-color: var(--darker-bg);
    color: var(--light-text);
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(58, 87, 232, 0.25);
}

.submit-btn {
    background-color: var(--primary-color);
    border: none;
    padding: 0.75rem 1.5rem;
    color: white;
    border-radius: 50px;
    font-weight: 500;
    transition: var(--transition);
}

.submit-btn:hover {
    background-color: #2845d1;
    cursor: pointer;
}

/* Footer */
.footer {
    background-color: var(--darker-bg);
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: center;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.footer-logo span {
    font-weight: 600;
    font-size: 1.2rem;
    margin-left: 0.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-bottom: 1rem;
}

.social-link {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background-color: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    color: white;
}

.copyright {
    color: var(--gray-text);
    font-size: 0.9rem;
}

/* Scroll Up Button */
.scroll-up-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    border: 2px solid white;
    border-radius: 50%;
    padding: 10px 15px;
    font-size: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: none;
    z-index: 9999;
}

.scroll-up-btn:hover {
    background-color: #2845d1;
    transform: translateY(-5px);
}

.scroll-up-btn:focus {
    outline: none;
}

/* Focus states for accessibility */
a:focus,
button:focus,
.btn:focus,
.form-control:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Responsive styles */
@media (max-width: 991.98px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section .subtitle {
        font-size: 1.2rem;
    }

    .social-icons {
        flex-direction: row;
        bottom: -20px;
        top: auto;
        right: 50%;
        transform: translateX(50%);
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 767.98px) {
    section {
        padding: 70px 0;
    }

    .hero-section {
        text-align: center;
    }

    .hero-image {
        margin-top: 3rem;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .cta-buttons .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .stats-row {
        margin-top: 3rem;
    }

    .stat-item {
        margin-bottom: 2rem;
    }

    .project-filters,
    .certificate-filters {
        flex-wrap: wrap;
    }

    .filter-btn,
    .cert-filter-btn {
        margin-bottom: 0.5rem;
    }

    .service-card,
    .expertise-banner {
        margin-bottom: 1.5rem;
    }
}

/* Print styles */
@media print {
    .navbar,
    .scroll-up-btn,
    .cta-buttons,
    .project-filters,
    .certificate-filters,
    .project-nav,
    .certificate-nav,
    .contact-form {
        display: none;
    }

    body {
        background-color: white;
        color: black;
    }
}