:root {
    --bg: #0b0f1a;
    --bg-light: #12182b;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --accent: #38bdf8;
}

/* ============================= */
/* 🌊 Animated wave background */
/* ============================= */

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background:
        linear-gradient(
            120deg,
            #0b0f1a,
            #0f172a,
            #1a0f12, /* subtiel rood */
            #020617,
            #0b0f1a
        );
    background-size: 500% 500%;
    animation: waveFlow 20s ease-in-out infinite;
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(circle at 15% 30%, rgba(239,68,68,0.08), transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(56,189,248,0.08), transparent 40%);
    animation: floatGlow 24s ease-in-out infinite alternate;
}

/* ============================= */
/* 🔁 Animations */
/* ============================= */

@keyframes waveFlow {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes floatGlow {
    from {
        transform: translateY(-30px);
    }
    to {
        transform: translateY(30px);
    }
}

/* ============================= */
/* 🔧 Base styling */
/* ============================= */

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

body {
    font-family: 'Inter', sans-serif;
    background: radial-gradient(circle at top, #0f172a, var(--bg));
    color: var(--text);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
}

header {
    padding: 2rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

nav {
    max-width: 1000px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.2rem;
}

nav li a {
    font-weight: 500;
    color: var(--text);
}

nav li a:hover {
    color: var(--accent);
}

main {
    max-width: 1000px;
    margin: auto;
    padding: 3rem 2rem;
}

section {
    background: rgba(18, 24, 43, 0.85);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.05);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

h2 {
    color: var(--accent);
    margin-bottom: 1rem;
}

p {
    color: var(--muted);
}

ul {
    list-style: none;
}

ul li {
    padding: 0.5rem 0;
}

.skills,
.certs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.badge {
    display: inline-block;
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    background: #020617;
    border: 1px solid var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--text);
    cursor: pointer;
    transition: all 0.25s ease;
}

.badge:hover {
    background: var(--accent);
    color: #020617;
    box-shadow: 0 0 18px rgba(56,189,248,0.4);
    transform: translateY(-2px);
}

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

.btn {
    padding: 0.8rem 1.6rem;
    border-radius: 8px;
    border: 1px solid var(--accent);
    background: var(--bg-light);
    font-weight: 600;
}

.btn:hover {
    background: var(--accent);
    color: #020617;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--muted);
    font-size: 0.9rem;
}