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

/* BODY + ANIMATED BACKGROUND */
body {
    font-family: 'Segoe UI', sans-serif;
    color: #e0e0ff;
    overflow-x: hidden;

    background: linear-gradient(270deg, #0f0c29, #302b63, #1a1a3a, #3a0ca3);
    background-size: 800% 800%;
    animation: gradientFlow 15s ease infinite;
}

/* BACKGROUND ANIMATION */
@keyframes gradientFlow {
    0% {background-position: 0% 50%;}
    50% {background-position: 100% 50%;}
    100% {background-position: 0% 50%;}
}

/* NAVBAR */
nav {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(15px);
    padding: 15px;
    position: sticky;
    top: 0;
    z-index: 999;
    border-bottom: 1px solid rgba(138,43,226,0.3);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

nav a {
    color: #b8b8ff;
    text-decoration: none;
    font-weight: 500;
    position: relative;
}

/* NAV HOVER LINE EFFECT */
nav a::after {
    content: "";
    position: absolute;
    width: 0%;
    height: 2px;
    left: 0;
    bottom: -4px;
    background: #a855f7;
    transition: 0.3s;
}

nav a:hover::after {
    width: 100%;
}

nav a:hover {
    color: #fff;
    text-shadow: 0 0 10px #8a2be2;
}

/* CONTAINERS (GLASS EFFECT) */
div {
    max-width: 900px;
    margin: 50px auto;
    padding: 25px;

    background: rgba(255,255,255,0.05);
    border-radius: 20px;
    backdrop-filter: blur(12px);

    box-shadow:
        0 0 20px rgba(138,43,226,0.2),
        inset 0 0 20px rgba(255,255,255,0.05);

    transition: 0.3s;
}

/* HOVER GLOW */
div:hover {
    transform: translateY(-5px);
    box-shadow:
        0 0 40px rgba(138,43,226,0.5),
        inset 0 0 20px rgba(255,255,255,0.1);
}

/* HEADINGS */
h1 {
    text-align: center;
    font-size: 2.7rem;
    margin-top: 20px;

    background: linear-gradient(90deg, #a855f7, #3b82f6);
    -webkit-background-clip: text;
    color: transparent;
}

h2, h3, h4 {
    margin-bottom: 10px;
}

.section-title {
    color: #c084fc;
    text-shadow: 0 0 15px #7c3aed;
}

/* SPECIAL TEXT */
.warning {
    color: #ff4d6d;
    text-align: center;
    text-shadow: 0 0 10px rgba(255,0,80,0.6);
}

.highlight {
    color: #a78bfa;
    text-align: center;
    text-shadow: 0 0 10px rgba(140,100,255,0.6);
}

/* BUTTONS (NEON) */
.btn {
    display: inline-block;
    margin: 10px 10px 10px 0;
    padding: 12px 22px;
    border-radius: 12px;
    border: none;

    background: linear-gradient(135deg, #7c3aed, #2563eb);
    cursor: pointer;

    position: relative;
    overflow: hidden;

    box-shadow: 0 0 15px rgba(138,43,226,0.6);
    transition: 0.3s;
}

.btn a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

/* BUTTON GLOW ANIMATION */
.btn::before {
    content: "";
    position: absolute;
    width: 150%;
    height: 100%;
    top: 0;
    left: -50%;
    background: linear-gradient(120deg, transparent, rgba(255,255,255,0.4), transparent);
    transform: skewX(-25deg);
}

/* HOVER EFFECT */
.btn:hover {
    transform: scale(1.08);
    box-shadow: 0 0 30px rgba(138,43,226,1);
}

.btn:hover::before {
    animation: shine 0.8s forwards;
}

@keyframes shine {
    100% {
        left: 120%;
    }
}

/* LINKS */
a {
    color: #9aa6ff;
    transition: 0.2s;
}

a:hover {
    color: #ffffff;
}

/* CODE BLOCK */
code {
    background: rgba(0,0,0,0.5);
    padding: 5px 8px;
    border-radius: 6px;
    color: #c084fc;
}

/* LIST */
ul, ol {
    margin: 15px 0 15px 20px;
}

/* HR */
hr {
    border: none;
    height: 1px;
    width: 80%;
    margin: 50px auto;

    background: linear-gradient(to right, transparent, #7c3aed, transparent);
}

/* MOBILE */
@media (max-width: 600px) {
    div {
        margin: 20px;
        padding: 15px;
    }

    h1 {
        font-size: 2rem;
    }
}