:root {
    /* Dark Theme (Default) */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent: #00d4ff;
    --accent-hover: #00b0d4;
    --border: #30363d;
    --navbar-bg: rgba(13, 17, 23, 0.9);
    --card-bg: #161b22;

    /* VSCode Syntax Colors */
    --vscode-bg: #1e1e1e;
    --vscode-blue: #569cd6;
    --vscode-red: #ce9178;
    --vscode-green: #4ec9b0;
    --vscode-yellow: #dcdcaa;
    --vscode-purple: #c586c0;
    --vscode-comment: #6a9955;
    
    /* Terminal Colors */
    --term-bg: #0d1117;
    --term-prompt: #4af626;
}

[data-theme="light"] {
    /* Light Theme */
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --text-primary: #24292e;
    --text-secondary: #586069;
    --accent: #005cc5;
    --accent-hover: #004491;
    --border: #e1e4e8;
    --navbar-bg: rgba(255, 255, 255, 0.9);
    --card-bg: #ffffff;
    
    /* Terminal remains dark even in light mode */
}

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

html {
    scroll-behavior: smooth;
    font-family: 'Inter', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s, color 0.3s;
}

body {
    line-height: 1.6;
}

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

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.section-pad {
    padding: 5rem 0;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    color: var(--text-primary);
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--accent);
    margin: 0.5rem auto 0;
    border-radius: 2px;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-align: center;
}

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

[data-theme="light"] .btn-primary {
    color: #fff;
}

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

[data-theme="light"] .btn-primary:hover {
    color: #fff;
}

.btn-secondary {
    background-color: rgba(0, 0, 0, 0.5);
    color: #fff;
    border: 1px solid var(--accent);
    backdrop-filter: blur(5px);
}

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

[data-theme="light"] .btn-secondary {
    background-color: #fff;
    color: var(--accent);
}

[data-theme="light"] .btn-secondary:hover {
    background-color: var(--accent);
    color: #fff;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--navbar-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    padding: 1rem 0;
    transition: background-color 0.3s, border-color 0.3s;
}

.nav-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

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

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

#theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-toggle .sun-icon { display: none; }
#theme-toggle .moon-icon { display: block; }
[data-theme="light"] #theme-toggle .sun-icon { display: block; }
[data-theme="light"] #theme-toggle .moon-icon { display: none; }

.lang-toggle button {
    background: none;
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 4px;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s;
}

.lang-toggle button:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
}

#matrix-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0.25;
}

[data-theme="light"] #matrix-bg {
    opacity: 0.05;
}

.hero-content {
    position: relative;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-text {
    background: rgba(13, 17, 23, 0.7);
    padding: 2rem;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

[data-theme="light"] .hero-text {
    background: rgba(255, 255, 255, 0.7);
}

.hero-text h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    line-height: 1.1;
}

.hero-text h2 {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.tagline {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-style: italic;
}

.cta-group {
    display: flex;
    gap: 1rem;
}

/* Terminal Widget */
.hero-terminal {
    background-color: var(--term-bg);
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    overflow: hidden;
    font-family: 'JetBrains Mono', monospace;
    color: #fff;
    border: 1px solid #333;
    display: flex;
    flex-direction: column;
    height: 400px;
}

.terminal-header {
    background-color: #2d2d2d;
    padding: 10px 15px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid #111;
}

.terminal-title {
    margin-left: 10px;
    font-size: 0.8rem;
    color: #aaa;
}

.dot { width: 12px; height: 12px; border-radius: 50%; }
.dot.red { background-color: #ff5f56; }
.dot.yellow { background-color: #ffbd2e; }
.dot.green { background-color: #27c93f; }

.terminal-body {
    padding: 15px;
    flex-grow: 1;
    overflow-y: auto;
    font-size: 0.9rem;
    line-height: 1.4;
    white-space: pre-wrap;
    display: flex;
    flex-direction: column;
}

.terminal-input-line {
    display: flex;
    padding: 0 15px 15px 15px;
    font-size: 0.9rem;
}

.prompt {
    color: var(--term-prompt);
    font-weight: bold;
    margin-right: 8px;
    white-space: nowrap;
}

#terminal-input {
    background: transparent;
    border: none;
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    flex-grow: 1;
    outline: none;
}

/* Scrollbar for terminal */
.terminal-body::-webkit-scrollbar { width: 8px; }
.terminal-body::-webkit-scrollbar-track { background: var(--term-bg); }
.terminal-body::-webkit-scrollbar-thumb { background: #333; border-radius: 4px; }

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* VSCode Tech Stack */
.stack-vscode-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.vscode-card {
    background-color: var(--vscode-bg);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid #333;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    transition: transform 0.3s, box-shadow 0.3s;
}

.vscode-card:hover {
    transform: translateY(-5px);
}

.vscode-card.infra { border-top: 3px solid var(--vscode-blue); }
.vscode-card.infra:hover { box-shadow: 0 0 15px rgba(86, 156, 214, 0.3); }
.vscode-card.sec { border-top: 3px solid var(--vscode-red); }
.vscode-card.sec:hover { box-shadow: 0 0 15px rgba(206, 145, 120, 0.3); }
.vscode-card.dev { border-top: 3px solid var(--vscode-yellow); }
.vscode-card.dev:hover { box-shadow: 0 0 15px rgba(220, 220, 170, 0.3); }
.vscode-card.auto { border-top: 3px solid var(--vscode-purple); }
.vscode-card.auto:hover { box-shadow: 0 0 15px rgba(197, 134, 192, 0.3); }

.vscode-comment {
    color: var(--vscode-comment);
    margin-bottom: 1rem;
}

.vscode-tokens {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.token {
    padding: 2px 6px;
    background-color: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    color: #ccc;
}

.infra .token { color: var(--vscode-blue); }
.sec .token { color: var(--vscode-red); }
.dev .token { color: var(--vscode-green); }
.auto .token { color: var(--vscode-purple); }

/* Certifications */
.certs-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
}

.cert-item {
    background-color: var(--card-bg);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-weight: 600;
    transition: border-color 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.cert-item img {
    height: 24px;
    width: auto;
}

.cert-item:hover {
    border-color: var(--accent);
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.service-card {
    background-color: var(--bg-primary);
    padding: 2.5rem 2rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    text-align: center;
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-card .icon {
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.service-card h3 {
    margin-bottom: 1rem;
}

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

/* Experience */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 20px;
    width: 2px;
    background-color: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-dot {
    position: absolute;
    left: 14px;
    top: 5px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: var(--accent);
    border: 2px solid var(--bg-primary);
}

.timeline-content h3 {
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.timeline-content h4 {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.timeline-content h4 span {
    color: var(--accent);
}

.timeline-content p {
    color: var(--text-secondary);
}

/* Clients */
.clients-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.client-card {
    background-color: var(--bg-primary);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.client-logo {
    max-height: 60px;
    object-fit: contain;
    margin-bottom: 1.5rem;
    align-self: flex-start;
}

.client-card h3 {
    margin-bottom: 0.5rem;
}

.client-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    flex-grow: 1;
}

.client-card a {
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
}

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    background-color: var(--card-bg);
    padding: 3rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.contact-info p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
}

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

.form-message {
    margin-top: 1rem;
    font-weight: 600;
}

.form-message.success { color: #27c93f; }
.form-message.error { color: #ff5f56; }

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

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
    }
    .hero-text {
        text-align: center;
    }
    .hero-text h1 { font-size: 2.8rem; }
    .cta-group { justify-content: center; }
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--navbar-bg);
        flex-direction: column;
        padding: 1rem 0;
        text-align: center;
        border-bottom: 1px solid var(--border);
    }
    
    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .section-pad {
        padding: 3rem 0;
    }
    
    .hero-terminal {
        height: 300px;
    }
}