/* --- Global Reset & Variables --- */
:root {
    --bg-dark: #0a0a0a;
    --bg-light: #121212;
    --text-main: #ffffff;
    --text-muted: #a0a0a0;
    --accent: #ffffff;
    --accent-dim: #333333;
    --border-color: #222222;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: 1px;
}

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

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

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 10px 15px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

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

.menu-toggle {
    display: none;
    cursor: pointer;
}

.menu-toggle .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--text-main);
    transition: var(--transition);
}

/* --- Sections Styling --- */
.section {
    padding: 100px 0 80px 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.alt-bg {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 40px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border-left: 4px solid var(--accent);
    padding-left: 15px;
}

/* --- Hero Section --- */
.hero-section {
    background: radial-gradient(circle at center, #1a1a1a 0%, var(--bg-dark) 100%);
    text-align: center;
    justify-content: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px auto;
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--bg-dark);
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background-color: transparent;
    color: var(--text-main);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-color);
    margin-left: 15px;
}

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

/* --- About & CV Button --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.about-text p {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.cv-btn {
    margin-top: 10px;
}

/* --- Skills Section --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.skill-category {
    background-color: var(--bg-dark);
    padding: 30px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 14px;
    font-size: 0.85rem;
    border-radius: 50px;
}

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.project-card {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: #444;
}

.project-info {
    padding: 30px;
}

.project-info h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
}

.project-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
    height: 75px;
    overflow: hidden;
}

.project-tech {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
}

.project-tech span {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 2px;
}

.project-links a {
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

/* --- Contact Form --- */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.contact-details {
    list-style: none;
    margin-bottom: 30px;
}

.contact-details li {
    margin-bottom: 15px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 15px;
}

.social-icons a {
    color: var(--text-main);
    font-size: 1.3rem;
    margin-right: 20px;
    transition: var(--transition);
}

.social-icons a:hover {
    color: var(--text-muted);
}

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

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 15px;
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.95rem;
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* --- Footer --- */
.footer {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Animations --- */
.fade-in {
    animation: fadeIn 1.2s ease forwards;
}

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

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* Can be toggled with mobile JS class */
    }
    .menu-toggle {
        display: block;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}