:root {
    --cyber-green: #00ff9d;
    --cyber-cyan: #00f0ff;
    --dark-bg: #0a0a0a;
    --card-bg: #111111;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--dark-bg);
    color: #e0e0e0;
    line-height: 1.6;
}

.navbar {
    backdrop-filter: blur(10px);
    background: rgba(0, 0, 0, 0.65) !important;
    border-bottom: 1px solid rgba(0, 255, 157, 0.12);
}

.nav-link {
    color: #ccc !important;
    transition: color 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--cyber-green) !important;
}

.brand-logo {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--cyber-green);
    letter-spacing: 2px;
}

.status-badge {
    font-size: 0.75rem;
    background: rgba(0, 255, 157, 0.12);
    color: var(--cyber-green);
    padding: 0.25rem 0.65rem;
    border-radius: 50px;
    border: 1px solid rgba(0, 255, 157, 0.3);
}

h1,
h2,
h3 {
    font-weight: 600;
    color: white;
}

h2.section-title {
    position: relative;
    display: inline-block;
    padding-bottom: 0.6rem;
    margin-bottom: 2.2rem;
}

h2.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--cyber-green);
    border-radius: 2px;
}

.card {
    background: var(--card-bg);
    border: 1px solid #222;
    transition: all 0.35s ease;
}

.card:hover {
    border-color: var(--cyber-green);
    transform: translateY(-6px);
    box-shadow: 0 12px 30px rgba(0, 255, 157, 0.08);
}

.tag {
    font-size: 0.78rem;
    background: rgba(0, 255, 157, 0.1);
    color: var(--cyber-green);
    border: 1px solid rgba(0, 255, 157, 0.25);
    padding: 0.35em 0.75em;
    border-radius: 50px;
    margin-right: 0.5em;
    margin-bottom: 0.5em;
    display: inline-block;
}

.btn-cyber {
    background: var(--cyber-green);
    color: black;
    font-weight: 600;
    border: none;
    transition: all 0.3s;
}

.btn-cyber:hover {
    background: #00e88c;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 255, 157, 0.35);
}

.btn-outline-cyber {
    border-color: var(--cyber-green);
    color: var(--cyber-green);
}

.btn-outline-cyber:hover {
    background: var(--cyber-green);
    color: black;
}

.achievement-img,
.cert-img,
.rec-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border: 1px solid #222;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.achievement-img:hover,
.cert-img:hover,
.rec-img:hover {
    transform: scale(1.04);
    box-shadow: 0 15px 35px rgba(0, 255, 157, 0.15);
}

.hud {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #00ff9d;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid #222;
    padding: 0.6rem 1.1rem;
    border-radius: 6px;
}

.scan-line {
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--cyber-green), transparent);
    animation: scan 4s linear infinite;
}

.banner-img {
    position: fixed;
    opacity: 0.2 !important;
    width: 98vw;
}

.banner-img img {
    width: 100%;
}

@keyframes scan {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.back-to-top {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background: var(--cyber-green);
    color: black;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

@media (max-width: 991px) {
    .navbar-collapse {
        background: #0a0a0a;
        padding: 1rem;
        border-radius: 8px;
        margin-top: 1rem;
    }
}