:root {
    --bg-color: #0b0c10;
    --bg-alt: #12141a;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --border: #1e293b;
    --card-bg: #111827;
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

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

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(11, 12, 16, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 1px;
}

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

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

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

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

.lang-switch {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.lang-switch .active {
    color: var(--text-primary);
    font-weight: 600;
}

/* Hero Section */
.hero {
    padding: 180px 0 100px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .subtitle {
    color: var(--accent);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.hero .headline {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: #fff;
    max-width: 800px;
}

.hero .description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent);
    color: #000;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background-color: rgba(255, 255, 255, 0.05);
}

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

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

.section-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 3rem;
    color: #fff;
    position: relative;
    padding-bottom: 10px;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 3px;
    background-color: var(--accent);
}

/* Grid & Cards (Focus) */
.grid {
    display: grid;
    gap: 2rem;
}

.focus-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition);
}

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

.card-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.card h3 {
    font-size: 1.1rem;
    color: #fff;
    margin-bottom: 0.8rem;
}

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

/* Work List */
.work-list {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.work-item {
    background-color: var(--bg-color);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem;
}

.work-title {
    font-size: 1.4rem;
    color: #fff;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
}

.work-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.work-block h4 {
    color: var(--accent);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

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

/* Technologies */
.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.tech-tag {
    background-color: rgba(56, 189, 248, 0.1);
    color: var(--accent);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* About */
.about-content {
    max-width: 800px;
}

.about-content p {
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.ai-note {
    font-size: 0.9rem !important;
    color: #64748b !important;
    margin-top: 2rem;
    padding-left: 1rem;
    border-left: 2px solid var(--border);
}

/* Contact */
.contact-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-card .section-title {
    margin-bottom: 1rem;
}

.contact-card .section-title::after {
    left: 50%;
    transform: translateX(-50%);
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-email {
    display: inline-block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--accent);
}

.contact-email:hover {
    color: var(--accent);
}

.contact-note {
    font-size: 0.9rem;
    margin-bottom: 0 !important;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none; /* simple hidden nav on mobile, focused on content */
    }
    
    .hero .headline {
        font-size: 2.5rem;
    }
    
    .work-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .contact-card {
        padding: 2rem;
    }
    
    .contact-email {
        font-size: 1.4rem;
    }
}