body {
    font-family: Arial, sans-serif;
    background: #f1f5f9;
    margin: 0;
    padding: 0;
}
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100vw;
    height: 100vh;
    overflow: auto;
    background: rgba(30, 41, 59, 0.5);
    justify-content: center;
    align-items: center;
}
.modal.show {
    display: flex;
}
.modal-content {
    background: #fff;
    margin: auto;
    padding: 2.5em 3.5em;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(37,99,235,0.12);
    width: min(95vw, 540px);
    max-width: 100vw;
    display: flex;
    flex-direction: column;
    gap: 1em;
}
.modal-content h2 {
    margin-top: 0;
    text-align: center;
    color: #2563eb;
}
label {
    font-size: 1em;
    color: #1e293b;
    margin-bottom: 0.2em;
}
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="password"] {
    padding: 0.7em 1em;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 1em;
    outline: none;
    margin-bottom: 0.7em;
    transition: border 0.2s;
}
input:focus {
    border: 1.5px solid #2563eb;
}
button {
    background: linear-gradient(90deg, #2563eb 0%, #60a5fa 100%);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.8em 2em;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(37,99,235,0.08);
    transition: background 0.2s, transform 0.1s;
}
button:hover {
    background: linear-gradient(90deg, #1d4ed8 0%, #38bdf8 100%);
    transform: translateY(-2px) scale(1.03);
}