:root {
    --bg-color: #0a0b0e;
    --card-bg: rgba(16, 18, 23, 0.7);
    --primary-color: #00ff41; /* Classic Matrix/Terminal Green */
    --accent-color: #00d2ff;
    --text-color: #e0e0e0;
    --muted-text: #888;
    --border-color: rgba(0, 255, 65, 0.2);
    --error-color: #ff3e3e;
    --glass-blur: blur(10px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

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

/* Typography */
h1, h2, h3, .terminal-text {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.text-neon {
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 255, 65, 0.5);
}

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

/* Navbar */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: rgba(10, 11, 14, 0.8);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn {
    padding: 0.6rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    border: none;
}

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

.btn-primary:hover {
    box-shadow: 0 0 20px rgba(0, 255, 65, 0.4);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: rgba(0, 255, 65, 0.1);
}

/* Hero Section */
.hero {
    height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(circle at center, rgba(0, 255, 65, 0.05) 0%, transparent 70%);
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: fadeInDown 1s ease-out;
}

.hero p {
    font-size: 1.2rem;
    color: var(--muted-text);
    max-width: 600px;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out;
}

/* Cards */
.card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 8px;
    transition: transform 0.3s, border-color 0.3s;
}

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

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

/* Forms */
.form-container {
    max-width: 450px;
    margin: 4rem auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--muted-text);
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: #fff;
    outline: none;
    transition: border-color 0.3s;
}

.form-control:focus {
    border-color: var(--primary-color);
}

/* Dashboard */
.dashboard-container {
    display: flex;
    min-height: calc(100vh - 80px);
}

.sidebar {
    width: 280px;
    background: rgba(16, 18, 23, 0.9);
    border-right: 1px solid var(--border-color);
    padding: 2rem;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 1rem;
}

.sidebar-nav a {
    color: var(--muted-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.8rem;
    border-radius: 4px;
    transition: all 0.3s;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    color: var(--primary-color);
    background: rgba(0, 255, 65, 0.1);
}

.main-content {
    flex: 1;
    padding: 3rem;
}

/* SQL Simulator Styles */
.sim-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.code-box {
    background: #000;
    padding: 1.5rem;
    border-radius: 4px;
    font-family: monospace;
    border-left: 4px solid var(--primary-color);
    margin-bottom: 1rem;
    font-size: 0.9rem;
    overflow-x: auto;
}

.vulnerable { border-left-color: var(--error-color); }
.secure { border-left-color: var(--primary-color); }

/* Animations */
@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .sim-container { grid-template-columns: 1fr; }
    .dashboard-container { flex-direction: column; }
    .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); }
}