/* GLOBAL */
body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(135deg, #ecfdf5, #f0f9ff);
}

/* NAVBAR */
.navbar {
    display: flex;
    align-items: center;
    padding: 18px 40px;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}
.back-btn {
    position: fixed;   /* ✅ makes it sticky */
    top: 20px;
    left: 20px;
    z-index: 1000;

    padding: 10px 15px;
    background: #3b82f6;
    color: white;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
}

.back-btn:hover {
    background: #2563eb;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    width: 35px;
}

.logo h2 {
    font-weight: 600;
}

/* CONTAINER */
.container {
    padding: 40px 60px;
}

/* TITLE */
h1 {
    font-size: 32px;
    margin-bottom: 20px;
}

/* BOX */
.box {
    background: white;
    padding: 25px;
    margin-top: 25px;
    border-radius: 16px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.06);
    transition: 0.3s;
    position: relative;
}

/* HOVER */
.box:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.1);
}

/* TOP LINE */
.box::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 5px;
    width: 100%;
    background: linear-gradient(90deg, #22c55e, #16a34a);
}

/* TEXT */
.box p {
    color: #555;
    line-height: 1.6;
}

/* LIST */
.box ul {
    padding-left: 18px;
}

.box ul li {
    margin-bottom: 8px;
}

/* VIDEO GRID */
.video-grid {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

/* VIDEO */
iframe {
    width: 320px;
    height: 190px;
    border-radius: 12px;
    border: none;
    transition: 0.3s;
}

iframe:hover {
    transform: scale(1.05);
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    iframe {
        width: 100%;
    }
}