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

/* BODY */
body {
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    background: radial-gradient(circle at top, #1e293b, #020617);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
}

/* GLOW BACKGROUND */
body::before {
    content: "";
    position: absolute;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(56,189,248,0.25), transparent 70%);
    top: -250px;
    left: -250px;
    filter: blur(90px);
}

body::after {
    content: "";
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99,102,241,0.25), transparent 70%);
    bottom: -250px;
    right: -250px;
    filter: blur(90px);
}

/* CONTAINER */
.container {
    position: relative;
    z-index: 2;
    text-align: center;

    padding: 70px 60px;

    border-radius: 25px;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);

    box-shadow: 0 0 60px rgba(0,0,0,0.7);

    width: 95%;
    max-width: 1200px;
}

/* LOGO */
.logo {
    font-size: 40px;
    font-weight: 900;

    background: linear-gradient(90deg, #38bdf8, #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;

    margin-bottom: 10px;
}

/* SUBTITLE */
.subtitle {
    font-size: 14px;
    color: #94a3b8;
    margin-bottom: 30px;
}

/* TITLES */
h1 {
    font-size: 30px;
    margin-bottom: 15px;
}

h2 {
    margin-top: 40px;
    margin-bottom: 10px;
    font-size: 20px;
    color: #38bdf8;
}

/* TEXT */
p {
    font-size: 15px;
    color: #cbd5f5;
    line-height: 1.6;
    margin-bottom: 10px;
}

/* STRONG */
strong {
    color: #fff;
}

/* BUTTON */
.upload-btn {
    display: inline-block;
    margin-top: 40px;
    padding: 16px 40px;

    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;

    color: #fff;
    background: linear-gradient(90deg, #38bdf8, #6366f1);

    transition: 0.3s;
    position: relative;
}

/* BUTTON HOVER */
.upload-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 0 30px rgba(56,189,248,0.9);
}

/* BUTTON GLOW */
.upload-btn::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50px;

    background: linear-gradient(90deg, #38bdf8, #6366f1);
    filter: blur(25px);

    opacity: 0;
    transition: 0.3s;
    z-index: -1;
}

.upload-btn:hover::after {
    opacity: 0.7;
}

/* FOOTER */
.footer {
    margin-top: 40px;
    font-size: 12px;
    color: #64748b;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .container {
        padding: 50px 30px;
    }

    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 18px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 35px 20px;
    }

    .logo {
        font-size: 30px;
    }

    h1 {
        font-size: 22px;
    }

    .upload-btn {
        padding: 14px 30px;
        font-size: 14px;
    }
}