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

body {
    font-family: Inter, Arial, sans-serif;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, #4f46e5, transparent 35%),
        radial-gradient(circle at bottom right, #06b6d4, transparent 35%),
        #0f172a;
    color: #ffffff;
}

.page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.card {
    width: 100%;
    max-width: 520px;
    padding: 42px;
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(22px);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.badge {
    display: inline-block;
    padding: 8px 14px;
    margin-bottom: 22px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    color: #dbeafe;
    font-size: 14px;
}

h1 {
    font-size: 38px;
    margin-bottom: 18px;
    line-height: 1.15;
}

p {
    color: #cbd5e1;
    line-height: 1.7;
    margin-bottom: 24px;
}

.download-btn,
button {
    display: inline-block;
    width: 100%;
    padding: 16px 22px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, #38bdf8, #6366f1);
    color: white;
    font-size: 16px;
    font-weight: 700;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.download-btn:hover,
button:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(56, 189, 248, 0.35);
}

.version {
    margin-top: 22px;
    font-size: 14px;
    color: #93c5fd;
}

.warning {
    color: #facc15;
}

form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

input {
    width: 100%;
    padding: 15px 16px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(15, 23, 42, 0.65);
    color: #ffffff;
    outline: none;
}

input::placeholder {
    color: #94a3b8;
}

input:focus {
    border-color: #38bdf8;
}

.message {
    padding: 14px 16px;
    border-radius: 14px;
    background: rgba(56, 189, 248, 0.14);
    margin-bottom: 20px;
}

.message p {
    margin: 0;
    color: #bae6fd;
}