@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;500;700&display=swap');

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f0f1a, #1f1f3d);
    color: white;
}

/* NAVBAR */
nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    padding: 15px;
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: 0.2s;
}

nav a:hover {
    color: #00ffd5;
}

/* PAGE CONTENT */
.container {
    text-align: center;
    padding: 40px 20px;
}

/* CARD STYLE */
.card {
    background: rgba(255,255,255,0.08);
    padding: 25px;
    margin: 20px auto;
    max-width: 600px;
    border-radius: 20px;
    backdrop-filter: blur(15px);
    box-shadow: 0 0 20px rgba(0,0,0,0.4);
}

/* IMAGE */
img {
    max-width: 250px;
    border-radius: 15px;
    margin-top: 15px;
}

/* BUTTONS */
.button {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 20px;
    border-radius: 10px;
    background: #00ffd5;
    color: black;
    text-decoration: none;
    font-weight: bold;
    transition: 0.2s;
}

.button:hover {
    background: #00c2a5;
}

/* FILE LIST */
.file {
    background: rgba(0,0,0,0.3);
    padding: 15px;
    margin-top: 15px;
    border-radius: 12px;
    text-align: left;
}

.file h3 {
    margin: 0;
}

.file p {
    font-size: 0.9em;
    opacity: 0.8;
}

/* YOUTUBE VIDEO */
iframe {
    width: 100%;
    max-width: 560px;
    height: 315px;
    border-radius: 15px;
    margin-top: 15px;
}