:root {
    --bg-color: #0d1117;
    --card-bg: #161b22;
    --border-color: #30363d;
    --text-color: #c9d1d9;
    --heading-color: #ffffff;
    --accent-color: #00ff66;
    --accent-cyan: #58a6ff;
    --accent-red: #ff5555;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-sans);
    line-height: 1.6;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 8%;
    background-color: rgba(22, 27, 34, 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.logo {
    font-family: var(--font-mono);
    font-weight: bold;
    color: var(--accent-color);
    font-size: 1.1rem;
}

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

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: 0.3s;
}

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

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 5rem 8% 3rem;
    max-width: 1100px;
    margin: 0 auto;
}

.terminal-badge {
    display: inline-block;
    background: rgba(0, 255, 102, 0.1);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    padding: 5px 15px;
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
}

.hero h1 {
    font-size: 3rem;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--accent-cyan);
    font-weight: 500;
    margin-bottom: 1rem;
}

.bio-summary {
    font-size: 1.05rem;
    max-width: 750px;
    margin-bottom: 2rem;
}

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

.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: 0.3s;
}

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

.primary-btn:hover {
    box-shadow: 0 0 15px rgba(0, 255, 102, 0.4);
}

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

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

/* Interactive Terminal */
.terminal-section {
    padding: 1rem 8% 4rem;
    max-width: 1100px;
    margin: 0 auto;
}

.terminal-window {
    background: #000;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    font-family: var(--font-mono);
}

.terminal-bar {
    background: #161b22;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

.terminal-title {
    color: #8b949e;
    font-size: 0.85rem;
    margin-left: 10px;
}

.terminal-body {
    padding: 20px;
    height: 220px;
    overflow-y: auto;
    font-size: 0.9rem;
}

.term-line { margin-bottom: 8px; }
.term-green { color: var(--accent-color); }
.term-cyan { color: var(--accent-cyan); }
.term-prompt { color: var(--accent-color); margin-right: 8px; }

.terminal-input-area {
    display: flex;
    padding: 10px 20px;
    background: #0d1117;
    border-top: 1px solid var(--border-color);
}

.terminal-input-area input {
    background: transparent;
    border: none;
    color: #fff;
    font-family: var(--font-mono);
    width: 100%;
    outline: none;
    font-size: 0.9rem;
}

.quick-cmd-btns {
    padding: 10px 20px;
    background: #161b22;
    display: flex;
    gap: 10px;
}

.quick-cmd-btns button {
    background: #21262d;
    border: 1px solid var(--border-color);
    color: var(--accent-cyan);
    padding: 4px 12px;
    border-radius: 4px;
    font-family: var(--font-mono);
    cursor: pointer;
    font-size: 0.8rem;
}

.quick-cmd-btns button:hover {
    background: var(--border-color);
}

/* General Sections */
.section {
    padding: 5rem 8%;
    max-width: 1100px;
    margin: 0 auto;
}

.alt-bg {
    background-color: #11151c;
    max-width: 100%;
    padding: 5rem 8%;
}

.section-title {
    font-size: 1.8rem;
    color: var(--heading-color);
    margin-bottom: 2.5rem;
    font-family: var(--font-mono);
}

/* Skills Cards */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 8px;
    transition: 0.3s;
}

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

.skill-icon {
    font-size: 2rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.skill-card h3 {
    color: var(--heading-color);
    margin-bottom: 0.5rem;
}

/* Projects Cards */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    max-width: 1100px;
    margin: 0 auto;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.project-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 1rem;
}

.project-tags span {
    background: #21262d;
    color: var(--accent-cyan);
    font-size: 0.75rem;
    font-family: var(--font-mono);
    padding: 3px 8px;
    border-radius: 4px;
}

.project-card h3 {
    color: var(--heading-color);
    margin-bottom: 0.8rem;
}

.project-links {
    margin-top: 1.5rem;
}

.project-links a {
    color: var(--accent-color);
    text-decoration: none;
    font-weight: bold;
}

/* Timeline */
.timeline {
    border-left: 2px solid var(--border-color);
    padding-left: 2rem;
    margin-left: 1rem;
}

.timeline-item {
    margin-bottom: 2.5rem;
    position: relative;
}

.timeline-item::before {
    content: '';
    width: 12px;
    height: 12px;
    background: var(--accent-color);
    border-radius: 50%;
    position: absolute;
    left: -2.45rem;
    top: 5px;
}

.timeline-date {
    font-family: var(--font-mono);
    color: var(--accent-cyan);
    font-size: 0.85rem;
    margin-bottom: 0.3rem;
}

.timeline-content h3 { color: var(--heading-color); }
.timeline-content h4 { color: #8b949e; margin-bottom: 0.8rem; font-weight: normal; }
.timeline-content ul { margin-left: 1.2rem; }

/* Certifications */
.certs-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    max-width: 1100px;
    margin: 0 auto;
}

.cert-badge {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    border-radius: 6px;
    color: var(--heading-color);
    font-weight: 500;
}

.cert-badge i {
    color: var(--accent-color);
    margin-right: 8px;
}

/* Footer */
footer {
    padding: 4rem 8%;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.contact-details {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin: 2rem 0;
}

.contact-details a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-size: 1.1rem;
}

.copyright {
    color: #8b949e;
    font-size: 0.85rem;
    font-family: var(--font-mono);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero h1 { font-size: 2.2rem; }
}