:root {
    --navy: #002249;
    --green: #3dcbb6;
    --green-dark: #3dbba6;
    --pink: #ff1e69;
    --border: #dce1e5;
    --bg: #f4f8fb;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: 'Montserrat', Helvetica, Arial, sans-serif;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.7;
    color: var(--navy);
    background: var(--bg);
}

.header {
    padding: 14px 24px;
    background: #fff;
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.1);
    text-align: center;
}

.header img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
    height: auto;
}

.main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 16px;
}

.card {
    width: 100%;
    max-width: 520px;
    padding: 44px 40px;
    background: #fff;
    border-top: 5px solid var(--green);
    border-radius: 6px;
    box-shadow: 0 12px 34px rgba(0, 34, 73, 0.1);
    text-align: center;
}

h1 {
    margin: 0 0 12px;
    font-size: 30px;
    font-weight: 800;
    line-height: 1.25;
}

.accent {
    color: var(--green);
}

p {
    margin: 0 0 24px;
}

form {
    text-align: left;
}

label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 700;
}

input[type="email"] {
    width: 100%;
    padding: 13px 16px;
    font: inherit;
    color: var(--navy);
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 5px;
    transition: border-color 300ms ease, box-shadow 300ms ease;
}

input[type="email"]:focus {
    outline: none;
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(61, 203, 182, 0.3);
}

input[type="email"][aria-invalid="true"] {
    border-color: var(--pink);
}

.error {
    margin: 8px 0 0;
    font-size: 14px;
    font-weight: 700;
    color: var(--pink);
}

.button {
    display: inline-block;
    width: 100%;
    margin-top: 22px;
    padding: 12px 30px;
    font: inherit;
    font-size: 18px;
    font-weight: 800;
    text-align: center;
    text-decoration: none;
    color: #fff;
    background: var(--green);
    border: 1px solid var(--green);
    border-radius: 5px;
    cursor: pointer;
    transition: all 300ms ease 0ms;
}

.button:hover,
.button:focus-visible {
    color: var(--green-dark);
    background: #fff;
}

.button:focus-visible {
    outline: 3px solid rgba(61, 203, 182, 0.4);
    outline-offset: 2px;
}

.check {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--green);
    position: relative;
}

.check::after {
    content: '';
    position: absolute;
    left: 23px;
    top: 13px;
    width: 16px;
    height: 30px;
    border: solid #fff;
    border-width: 0 5px 5px 0;
    transform: rotate(45deg);
}

/* Campo trampa anti-bots: fuera de la vista para personas. */
.trap {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.footer {
    padding: 18px 16px;
    font-size: 13px;
    text-align: center;
    color: #fff;
    background: var(--navy);
}

.footer p {
    margin: 0;
}

.footer a {
    color: var(--green);
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

@media (max-width: 480px) {
    .card {
        padding: 32px 22px;
    }

    h1 {
        font-size: 24px;
    }
}