:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #58a6ff;
    --border: #30363d;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 70px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

nav {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: 70px;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* Sections */
section {
    padding: 4rem 0;
    min-height: auto;
    display: flex;
    align-items: center;
    position: relative;
    opacity: 0;
    transform: translateY(20px);
}

section.reveal {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s ease;
}

#home {
    background: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    text-align: center;
}

#home::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--accent),
        transparent
    );
    opacity: 0.3;
    box-shadow: 0 0 15px rgba(88, 166, 255, 0.2);
}

#home::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 15% 50%, rgba(88, 166, 255, 0.08) 0%, transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(88, 166, 255, 0.08) 0%, transparent 25%),
        linear-gradient(rgba(88, 166, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(88, 166, 255, 0.05) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 30px 30px, 30px 30px;
    background-position: 0 0, 0 0, 0 0, 0 0;
    animation: backgroundShift 15s ease-in-out infinite alternate;
    opacity: 0.5;
}

@keyframes backgroundShift {
    0% {
        background-position: 0 0, 0 0, 0 0, 0 0;
    }
    100% {
        background-position: 10% 20%, -10% -10%, 5px 5px, 5px 5px;
    }
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    position: relative;
    overflow: hidden;
    padding: 0.75rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

.btn:hover::before {
    transform: translateX(0);
}

.btn.primary {
    background-color: var(--accent);
    color: #fff;
}

.btn.secondary {
    border: 1px solid var(--accent);
    color: var(--accent);
}

.btn:hover {
    transform: translateY(-2px);
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.profile-card {
    box-shadow: 0 0 20px rgba(88, 166, 255, 0.1);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.5rem;
}

.stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.stat {
    text-align: center;
}

.stat i {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.stat span {
    display: block;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.stat strong {
    display: block;
    font-size: 1.25rem;
    margin-top: 0.25rem;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.skill-tag {
    background-color: var(--bg-secondary);
    color: var(--accent);
    padding: 0.25rem 0.75rem;
    border-radius: 2rem;
    font-size: 0.9rem;
    border: 1px solid var(--border);
    position: relative;
    background: var(--bg-secondary);
    border: none;
    z-index: 1;
}

.skill-tag::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 2rem;
    padding: 1px;
    background: linear-gradient(90deg, var(--accent), #58a6ff80);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.project-card {
    background: linear-gradient(145deg, #161b22, #1c2129);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.project-card.reveal {
    opacity: 1;
    transform: translateY(0);
}

.project-card h3 {
    background: linear-gradient(90deg, var(--accent), #58a6ff80);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
}

.project-card:hover {
    transform: translateY(-4px);
}

.project-card .skills {
    margin-bottom: 1.5rem;
}

.project-card .btn.primary {
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.project-card .btn.primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -1px;
    width: calc(100% + 2px);
    height: 100%;
    background: rgba(255, 255, 255, 0.08);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.project-card .btn.primary:hover::before {
    transform: scaleX(1);
    transform-origin: left;
}

.contact-content {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    padding: 1rem 2rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.contact-item:hover {
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(88, 166, 255, 0.1);
}

.contact-item i {
    font-size: 1.5rem;
}

footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
}

h2 {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.5rem;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
}

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), transparent);
    transform-origin: 0 50%;
    transform: scaleX(0);
    z-index: 1001;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

.section-description {
    color: var(--text-secondary);
    max-width: 600px;
    text-align: left;
}

.hidden {
    opacity: 0;
    transform: translateY(20px);
}

.reveal {
    animation: fadeInUp 0.6s ease forwards;
}

.loader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loader::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(88, 166, 255, 0.2),
        transparent
    );
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 10000;
    transition: transform 0.8s ease-in-out;
}

.loader-content {
    text-align: center;
}

.loader-content i {
    font-size: 3rem;
    color: var(--accent);
    animation: pulse 1.5s ease infinite;
}

.loading-bar {
    width: 130px;
    height: 2px;
    background: var(--bg-secondary);
    margin-top: 1.5rem;
    position: relative;
    overflow: hidden;
    border-radius: 2px;
}

.loading-bar::after {
    content: '';
    position: absolute;
    width: 40%;
    height: 100%;
    background: var(--accent);
    animation: loading 1s ease infinite;
}

.loader.fade-out::after {
    transform: translateX(200%);
}

.loader.fade-out {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s 0.8s, visibility 0.3s 0.8s;
}

main {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    z-index: 9998;
    opacity: 1;
    transition: opacity 0.8s ease;
}

.page-transition.fade {
    opacity: 0;
    pointer-events: none;
}

.page-transition.active {
    animation: sweepRight 1s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes sweepRight {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

@keyframes loading {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(250%); }
}

.loader.fade-out {
    opacity: 0;
    visibility: hidden;
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        align-items: center;
        padding: 1rem 0;
        border-bottom: 1px solid var(--border);
        transform: translateY(-100%);
        opacity: 0;
        transition: all 0.3s ease;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-links li {
        width: 100%;
        text-align: center;
        padding: 0.5rem 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1.2rem;
    }

    .nav-content {
        padding: 1rem;
    }

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

    .skill-tag {
        font-size: 0.8rem;
    }

    section {
        padding: 3rem 0;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}