:root {
    --primary: #3b82f6;
    --primary-glow: rgba(59, 130, 246, 0.4);
    --bg-color: #050810;
    --card-bg: rgba(15, 23, 42, 0.75);
    --text-main: #ffffff;
    --text-dim: #94a3b8;
    --border: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
    --bg-color: #f1f5f9;
    --card-bg: rgba(255, 255, 255, 0.85);
    --text-main: #0f172a;
    --text-dim: #475569;
    --border: rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
}

body {
    background: var(--bg-color);
    color: var(--text-main);
    overflow-x: hidden;
    transition: background 0.4s ease;
}

/* HIGH-PERFORMANCE PHYSICS CANVAS */
#physics-bg {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -1;
    opacity: 0.6;
}

/* RESPONSIVE NAV BAR */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 4%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -0.5px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 1.2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.8rem;
    transition: 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* GLASS CONTAINER */
.container {
    padding: 120px 8% 50px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* HERO SECTION */
.hero-wrapper {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
    width: 100%;
}

.hero-content h1 {
    font-size: 4.5rem;
    line-height: 1;
    margin-bottom: 1.5rem;
    font-weight: 900;
}

.hero-content h1 span {
    color: var(--primary);
    text-shadow: 0 0 30px var(--primary-glow);
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-dim);
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* CARDS */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 2.5rem;
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.profile-card {
    text-align: center;
    max-width: 400px;
}

.profile-card img {
    width: 100%;
    border-radius: 20px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border);
}

/* BADGES */
.badge-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 1.5rem;
}

.badge {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid var(--primary);
    padding: 5px 12px;
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--primary);
    text-transform: uppercase;
}

/* BUTTONS */
.btn {
    background: var(--primary);
    color: white;
    padding: 14px 35px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 800;
    display: inline-block;
    transition: 0.4s;
    border: none;
    box-shadow: 0 10px 20px var(--primary-glow);
}

.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--primary-glow);
}

.theme-toggle {
    background: var(--border);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1rem;
}

/* RESPONSIVENESS */
@media (max-width: 1100px) {
    .hero-content h1 { font-size: 3.5rem; }
}

@media (max-width: 900px) {
    .hero-wrapper { grid-template-columns: 1fr; text-align: center; }
    .hero-content h1 { font-size: 3rem; }
    .badge-group { justify-content: center; }
}