/* --- Design System Variables --- */
:root {
    --bg-dark: #0f0f12;
    --bg-card: #1a1a24;
    --accent-neon: #00f0ff;
    --accent-purple: #9d4edd;
    --text-light: #f8f9fa;
    --text-muted: #adbac7;
    --transition: all 0.3s ease;
}

/* --- Global Reset & Styles --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, sans-serif;
}

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

/* --- Header & Navigation --- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 15, 18, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1px;
    background: linear-gradient(45deg, var(--accent-neon), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.tab-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 0;
    position: relative;
    transition: var(--transition);
}

.tab-btn:hover, .tab-btn.active {
    color: var(--accent-neon);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-neon);
    box-shadow: 0 0 10px var(--accent-neon);
}

/* --- Layout & Sections --- */
main {
    max-width: 1200px;
    margin: 8rem auto 4rem;
    padding: 0 2rem;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease forwards;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    text-align: center;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 3rem;
}

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

.card {
    background-color: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-purple);
    box-shadow: 0 10px 20px rgba(157, 78, 221, 0.1);
}

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

.card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-neon);
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

/* --- Buttons --- */
.btn {
    background: linear-gradient(45deg, var(--accent-purple), #7b2cbf);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    opacity: 0.9;
    box-shadow: 0 0 15px rgba(157, 78, 221, 0.4);
}

/* --- Contact Form --- */
.contact-container {
    max-width: 600px;
    margin: 0 auto;
    background-color: var(--bg-card);
    padding: 2.5rem;
    border-radius: 12px;
}

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

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

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: white;
}

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

.contact-container .btn {
    width: 100%;
    background: linear-gradient(45deg, var(--accent-neon), var(--accent-purple));
}

@media (max-width: 768px) {
    .nav-container { flex-direction: column; gap: 1rem; }
    main { margin-top: 11rem; }
}
/* --- Footer Styles --- */
footer {
    width: 100%;
    background-color: var(--bg-card);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 2rem 0;
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-container p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 600;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--accent-neon);
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
}

/* Adjust layout on mobile devices */
@media (max-width: 600px) {
    .footer-container {
        flex-direction: column;
        text-align: center;
    }
}