:root {
    /* Color Palette */
    --accent-main: #00d4ff;
    --accent-secondary: #ff7e00;
    --accent-warning: #ff3e3e;
    
    /* Transitions */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --glass-blur: blur(12px);
}

/* Theme: Dark (Default) */
[data-theme="dark"] {
    --bg-base: #0a0a0c;
    --bg-surface: #16161a;
    --bg-nav: rgba(10, 10, 12, 0.85);
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-main: #f0f0f5;
    --text-muted: #a0a0ab;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    --glow: 0 0 20px rgba(0, 212, 255, 0.2);
}

/* Theme: Light */
[data-theme="light"] {
    --bg-base: #f8fafc;
    --bg-surface: #ffffff;
    --bg-nav: rgba(248, 250, 252, 0.85);
    --bg-card: rgba(0, 0, 0, 0.02);
    --border-color: rgba(0, 0, 0, 0.1);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    --glow: 0 0 20px rgba(0, 212, 255, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition), color var(--transition);
}

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

h1, h2, h3, .logo-text {
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100px;
    background-color: var(--bg-nav);
    backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    z-index: 1001;
}

.navbar .container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-brand {
    display: flex;
    flex-direction: column;
    line-height: 1;
    transition: var(--transition);
    padding: 10px 0;
}

.brand-main {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.4rem;
    font-weight: 900;
    letter-spacing: 5px;
    color: var(--text-main);
    text-shadow: 0 0 20px var(--accent-main);
}

[data-theme="light"] .brand-main {
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.05);
    color: var(--text-main);
    background: none;
    -webkit-text-fill-color: initial;
}

.brand-sub {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 8px;
    color: var(--accent-main);
    margin-top: 4px;
    font-weight: 500;
}

.logo:hover .logo-brand {
    transform: translateY(-2px);
}

.logo:hover .brand-main {
    text-shadow: 0 0 35px var(--accent-main);
}

.logo-text span {
    color: var(--accent-main);
    font-weight: 400;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition);
}

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

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

.lang-switch {
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.lang-switch a {
    text-decoration: none;
    color: var(--text-muted);
    transition: var(--transition);
}

.lang-switch a.active {
    color: var(--accent-main);
}

#theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-main);
    font-size: 1.1rem;
    transition: var(--transition);
}

#theme-toggle:hover {
    color: var(--accent-main);
    transform: rotate(15deg);
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
    background: radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.08), transparent 40%);
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-family: 'Poppins', sans-serif;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 700;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    letter-spacing: 1px;
    transition: var(--transition);
    display: inline-block;
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent-main);
    color: #000;
    border: none;
}

.btn-primary:hover {
    background-color: #fff;
    box-shadow: 0 0 20px var(--accent-main);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-main);
}

.btn-outline:hover {
    border-color: var(--accent-main);
    color: var(--accent-main);
}

/* Projects Section */
.projects {
    padding: 100px 0;
    background-color: var(--bg-surface);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--accent-main);
}

.section-title.left {
    text-align: left;
}

.section-title.left::after {
    left: 0;
    transform: none;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-main);
    box-shadow: var(--glow);
}

.card-img {
    height: 250px;
    background-size: cover;
    background-position: center;
    position: relative;
}

.card-overlay {
    position: absolute;
    top: 20px;
    right: 20px;
}

.badge {
    background-color: var(--accent-main);
    color: #000;
    padding: 0.4rem 1rem;
    font-size: 0.7rem;
    font-weight: 800;
    font-family: 'Orbitron', sans-serif;
    border-radius: 4px;
}

.badge.warning {
    background-color: var(--accent-secondary);
}

.card-body {
    padding: 2rem;
}

.card-body h3 {
    font-size: 1.5rem;
    margin-bottom: 0.2rem;
}

.tagline {
    display: block;
    color: var(--accent-main);
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    text-transform: uppercase;
}

.card-body p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.btn-card {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-card:hover {
    color: var(--accent-main);
}

/* News Section */
.news {
    padding: 100px 0;
}

.news-list {
    max-width: 800px;
    margin: 0 auto;
}

.news-item {
    background: var(--bg-card);
    padding: 2rem;
    border-left: 4px solid var(--accent-main);
    margin-bottom: 1.5rem;
    border-radius: 0 8px 8px 0;
}

.news-date {
    font-size: 0.8rem;
    color: var(--accent-main);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.news-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

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

/* Contact Section */
.contact {
    padding: 100px 0;
    background-color: var(--bg-surface);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
}

.social-links {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
}

.social-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    transition: var(--transition);
}

.social-btn:hover {
    border-color: var(--accent-main);
    transform: translateY(-3px);
}

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

#contact-form input, #contact-form textarea {
    width: 100%;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    padding: 1.2rem;
    color: var(--text-main);
    border-radius: 8px;
    font-family: inherit;
    transition: var(--transition);
}

#contact-form input:focus, #contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-main);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.1);
}

#contact-form textarea {
    height: 150px;
    resize: none;
}

/* Footer */
.footer {
    padding: 50px 0;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    font-family: 'Orbitron', sans-serif;
    font-weight: 900;
    font-size: 1.1rem;
}

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

.footer-legal {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
}

.footer-legal span {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Animations */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.2s; }
.delay-2 { transition-delay: 0.4s; }

/* Responsive */
@media (max-width: 968px) {
    .hero h1 { font-size: 3rem; }
    .contact-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; }
    .projects-grid { grid-template-columns: 1fr; }
}