:root {
    --bg-color: #050505;
    --bg-secondary: #0a0a0a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-color: #007cf0;
    --accent-gradient: linear-gradient(135deg, #007cf0 0%, #00dfd8 100%);
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.05);
    --nav-height: 80px;
    --container-width: 1200px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: 0.3s ease;
}

ul {
    list-style: none;
}

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

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 700;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.75rem; }

.text-gradient {
    background: var(--accent-gradient);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s ease;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #fff;
    box-shadow: 0 0 20px rgba(0, 124, 240, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 124, 240, 0.5);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
}

.btn-outline:hover {
    border-color: var(--accent-color);
    background: rgba(0, 124, 240, 0.1);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    transition: 0.4s ease;
    display: flex;
    align-items: center;
    background: rgba(5, 5, 5, 0.2);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header.scrolled {
    background: rgba(5, 5, 5, 0.95);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.5);
}

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

.logo img {
    height: 60px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: #fff;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: 0.3s ease;
}

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

.mobile-toggle {
    display: none;
    font-size: 1.5rem;
    color: #fff;
    cursor: pointer;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--nav-height);
}

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

.hero-bg img, .hero-bg video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(5,5,5,0.2), var(--bg-color));
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(0, 124, 240, 0.1);
    border: 1px solid rgba(0, 124, 240, 0.3);
    border-radius: 30px;
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
    letter-spacing: 1px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

/* Page Header (Small Hero) */
.page-header {
    height: 50vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background-size: cover;
    background-position: center;
    text-align: center;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(5, 5, 5, 0.7);
    z-index: 1;
}

.page-header-content {
    position: relative;
    z-index: 2;
}

.page-header h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Sections */
section {
    padding: 100px 0;
}

.bg-darker {
    background-color: var(--bg-secondary);
}

/* Cards Grid */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: 50px;
    align-items: center;
}

/* Feature Card */
.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 40px;
    border-radius: 20px;
    transition: 0.3s ease;
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    /* -webkit-text-fill-color: transparent; */
}

.feature-card h3 {
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
    margin-top: 50px;
}

.stat-item h3 {
    font-size: 3rem;
    margin-bottom: 10px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-item p {
    color: var(--text-secondary);
}

/* Footer */
.footer {
    background: #000;
    padding: 80px 0 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 20px;
    font-size: 0.95rem;
    max-width: 300px;
}

.footer-col h4 {
    margin-bottom: 25px;
    font-size: 1.1rem;
}

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: var(--text-secondary);
}

.footer-links a:hover {
    color: var(--accent-color);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Scroll Animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .hero h1 { font-size: 3rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--nav-height));
        background: #000;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transform: translateX(100%);
        transition: 0.3s ease;
    }
    
    .nav-links.active {
        transform: translateX(0);
    }
    
    .mobile-toggle { display: block; }
    .hero { text-align: center; justify-content: center; }
    .hero-content { margin: 0 20px; }
    .grid-2, .grid-3, .stats-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-bottom { flex-direction: column; gap: 20px; text-align: center; }
}

/* Portfolio Filter */
.filter-container {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 25px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    cursor: pointer;
    transition: 0.3s ease;
    font-size: 0.9rem;
}

.filter-btn:hover, .filter-btn.active {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.page-hero {
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background-color: var(--bg-color);
    overflow: hidden;
    margin-top: 0;
}

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

.page-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.6;
}

.page-hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 800px;
    padding: 0 20px;
}

/* Process Steps */
.process-step {
    position: relative;
    padding: 40px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.process-step:hover {
    transform: translateY(-10px);
    border-color: var(--accent-color);
}

.step-number {
    font-size: 3rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.1);
    position: absolute;
    top: 20px;
    right: 20px;
}

/* Contact Form */
.contact-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    color: #fff;
    font-family: inherit;
    transition: 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.1);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.contact-info-card {
    padding: 30px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 15px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: rgba(0, 124, 240, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--accent-color);
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--card-border);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    right: -10px;
    background-color: var(--bg-color);
    border: 4px solid var(--accent-color);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.left {
    left: 0;
}

.right {
    left: 50%;
}

.left::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    right: 30px;
    border: medium solid var(--card-border);
    border-width: 10px 0 10px 10px;
    border-color: transparent transparent transparent var(--card-border);
}

.right::before {
    content: " ";
    height: 0;
    position: absolute;
    top: 22px;
    width: 0;
    z-index: 1;
    left: 30px;
    border: medium solid var(--card-border);
    border-width: 10px 10px 10px 0;
    border-color: transparent var(--card-border) transparent transparent;
}

.right::after {
    left: -10px;
}

.timeline-content {
    padding: 20px 30px;
    background: var(--card-bg);
    position: relative;
    border-radius: 6px;
    border: 1px solid var(--card-border);
}

@media screen and (max-width: 600px) {
    .timeline::after {
        left: 31px;
    }
    .timeline-item {
        width: 100%;
        padding-left: 70px;
        padding-right: 25px;
    }
    .timeline-item::before {
        left: 60px;
        border: medium solid var(--card-border);
        border-width: 10px 10px 10px 0;
        border-color: transparent var(--card-border) transparent transparent;
    }
    .left::after, .right::after {
        left: 21px;
    }
    .right {
        left: 0%;
    }
}


/* Portfolio Grid */
.portfolio-item {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    height: 300px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.3);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-item:hover .portfolio-img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    opacity: 0;
    transition: all 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-cat {
    color: var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 5px;
    transform: translateY(20px);
    transition: 0.3s ease;
}

.portfolio-overlay h3 {
    color: #fff;
    margin-bottom: 0;
    transform: translateY(20px);
    transition: 0.3s ease 0.1s;
}

.portfolio-item:hover .portfolio-cat,
.portfolio-item:hover .portfolio-overlay h3 {
    transform: translateY(0);
}

/* Stats Styles */
.stat-num {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Certificate Carousel */
.cert-carousel-wrapper {
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    padding: 0 10px;
}

.cert-track-container {
    overflow: hidden;
    width: 100%;
}

.cert-track {
    display: flex;
    gap: 20px;
    transition: transform 0.5s ease-in-out;
}

.cert-item {
    flex: 0 0 calc(33.333% - 14px); /* 3 items per row */
    aspect-ratio: 3/4;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.cert-landscape .cert-item {
    aspect-ratio: 4/3;
}

.cert-item:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.cert-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.cert-item:hover img {
    transform: scale(1.05);
}

.cert-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    flex-shrink: 0;
    z-index: 2;
}

.cert-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

/* Responsive Carousel */
@media (max-width: 768px) {
    .cert-item {
        flex: 0 0 calc(50% - 10px); /* 2 items */
    }
}

@media (max-width: 480px) {
    .cert-item {
        flex: 0 0 100%; /* 1 item */
    }
}