:root {
    --bg: radial-gradient(circle at 30% 20%, #0e1016, #05060a 70%);
    --accent: #00ffe0;
    --accent2: #0072ff;
    --card-bg: rgba(255, 255, 255, 0.08);
    --text: #f2f4f8;
    --muted: #a5acba;
    --radius: 18px;
    --blur: 20px;
    --shadow: 0 6px 25px rgba(0, 0, 0, 0.3);
}

body {
    font-family: "Inter", "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    margin: 0;
    overflow-x: hidden;
    scroll-behavior: smooth;
}

/* Header -------------------------------------------------- */
header {
    text-align: center;
    padding: 6rem 2rem 4rem;
    background: linear-gradient(135deg, #00ffe0 0%, #0072ff 100%);
    background-size: 200% 200%;
    animation: gradientShift 10s ease-in-out infinite alternate;
    color: #fff;
    box-shadow: var(--shadow);
}
@keyframes gradientShift {
    from { background-position: 0% 50%; }
    to   { background-position: 100% 50%; }
}
header h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 700;
    margin-bottom: 0.6rem;
    letter-spacing: 0.03em;
    text-shadow: 0 0 25px rgba(0,255,224,0.4);
}
header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Layout --------------------------------------------------- */
main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 4rem auto;
    padding: 0 2rem;
}

section {
    backdrop-filter: blur(var(--blur));
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 2.5rem;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: transform 0.35s ease, box-shadow 0.35s ease, border 0.35s ease;
}
section:hover {
    transform: translateY(-6px);
    box-shadow: 0 0 35px rgba(0, 255, 224, 0.25);
    border-color: rgba(0, 255, 224, 0.35);
}

/* Typografie ----------------------------------------------------- */
h2 {
    color: var(--accent);
    margin-bottom: 1.1rem;
    font-size: 1.5rem;
    letter-spacing: 0.4px;
    position: relative;
}
h2::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    border-radius: 2px;
}

p { margin-bottom: 0.8rem; }

ul {
    list-style: none;
    margin: 0;
    padding-left: 0;
}
ul li {
    margin-bottom: 0.5rem;
}
ul li::before {
    content: "▸";
    color: var(--accent2);
    margin-right: 0.6rem;
}

/* Links + Footer ------------------------------------------ */
a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}
a:hover { color: var(--accent2); }

footer {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--muted);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    background: rgba(255, 255, 255, 0.02);
    backdrop-filter: blur(10px);
}

/* Responsive ---------------------------------------------- */
@media (max-width: 1000px) {
    main {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}
@media (max-width: 700px) {
    main { padding: 0 1.2rem; }
    section { padding: 1.8rem; }
}