:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --card-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #6366f1; /* Indigo */
    --accent-hover: #4f46e5;
    --success: #10b981;
    --border-color: #334155;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

h1 { font-size: 3rem; margin-bottom: 1rem; }
h2 { font-size: 2.25rem; margin-bottom: 2rem; text-align: center; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
p { margin-bottom: 1.5rem; color: var(--text-secondary); }

a {
    text-decoration: none;
    color: var(--accent);
    transition: color 0.3s ease;
}

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

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.section-padding {
    padding: 6rem 0;
}

/* Header */
header {
    padding: 1.5rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.logo span {
    color: var(--accent);
}

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

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

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px; /* Offset for fixed header */
}

.hero-content h1 {
    font-size: 4rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content .subtitle {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.badge {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* About/Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.skill-card {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

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

.skill-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

/* Project Title Wrapper */
.project-title-wrapper {
    display: flex;
    align-items: center;
}

/* Projects Section */
.project-card {
    background-color: var(--card-bg);
    border-radius: 1.5rem;
    overflow: hidden;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    margin-bottom: 3rem;
}

.project-img-container {
    display: flex;
    justify-content: center;
    margin-right: 1.5rem;
}

.project-logo-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid var(--accent);
    padding: 3px;
    background-color: var(--card-bg);
    overflow: hidden;
    flex-shrink: 0;
}

.project-logo-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Profile Picture */
.hero-profile-container {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 4px solid var(--accent);
    padding: 5px;
    background-color: var(--card-bg);
    margin: 0 auto 2rem;
    overflow: hidden;
}

.hero-profile-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: transform 0.5s ease;
}

.hero-profile-container:hover img {
    transform: scale(1.1);
}

.project-content {
    padding: 3rem;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.project-tag {
    background-color: var(--accent);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin: 2rem 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
}

.check-icon {
    color: var(--success);
    flex-shrink: 0;
}

.project-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.stat h4 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.stat p {
    font-size: 0.875rem;
    margin: 0;
}

/* Contact Section */
.contact-wrapper {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.social-btn {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.social-btn:hover {
    color: var(--text-primary);
    transform: translateY(-3px);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        right: 20px;
        background-color: var(--card-bg);
        padding: 1.5rem;
        border-radius: 0.5rem;
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
        border: 1px solid var(--border-color);
        width: 200px;
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }

    /* Fix hero overlap */
    .hero {
        padding-top: 140px;
        align-items: flex-start;
    }

    /* Improve project card mobile look */
    .project-title-wrapper {
        flex-direction: column;
        text-align: center;
        width: 100%;
    }

    .project-img-container {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .project-tag {
         display: inline-block;
    }
    
    .project-content {
        padding: 2rem;
    }
}