:root {
    --login-verde: #216b70;
    --login-verde-oscuro: #164f54;
    --login-verde-profundo: #0f3f43;
    --login-celeste: #d9f2f4;
    --login-acento: #f3b23a;
    --login-texto: #203336;
    --login-suave: #607477;
    --login-borde: #dce9eb;
    --login-card: #ffffff;
}

* {
    box-sizing: border-box;
}

a.button {
    padding: 1px 6px;
    border: 1px outset buttonborder;
    border-radius: 8px;
    color: buttontext;
    background-color: buttonface;
    text-decoration: none;
}

body {
    min-height: 100vh;
    margin: 0;
    display: grid;
    place-items: center;
    background:
        radial-gradient(circle at top left, rgba(217, 242, 244, 0.9), transparent 34%),
        linear-gradient(135deg, #f4f8f9 0%, #eef6f7 48%, #f9fbfb 100%);
    color: var(--login-texto);
    font-family: Ebrima, Arial, sans-serif;
    padding: 28px 16px;
}

.overall {
    width: min(420px, 100%);
    margin: 0 auto;
}

.form {
    color: var(--login-texto);
    border-radius: 8px;
    background: var(--login-card);
    border: 1px solid var(--login-borde);
    box-shadow: 0 18px 45px rgba(15, 63, 67, 0.16);
    padding: 30px;
}

.title {
    text-align: center;
    margin: 8px 0 24px;
    color: var(--login-verde-oscuro);
    font-size: 1.35rem;
}

.system-title {
    margin: 0 0 18px;
    color: var(--login-verde-profundo);
    font-size: 1.55rem;
    line-height: 1.25;
    text-align: center;
}

.form-input {
    margin-bottom: 16px;
}

.form-input label {
    display: block;
    margin-bottom: 7px;
    color: var(--login-suave);
    font-size: 0.94rem;
    font-weight: 700;
}

.form-input input {
    min-height: 42px;
    width: 100%;
    border-radius: 8px;
    padding: 0.55rem 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--login-borde);
    color: var(--login-texto);
    background: #fbfefe;
}

button {
    width: 100%;
    min-height: 42px;
    border: none;
    border-radius: 8px;
    padding: 0.55rem 1rem;
    background: var(--login-verde) !important;
    color: #fff;
    box-shadow: 0 10px 20px rgba(33, 107, 112, 0.22);
    font-size: 1rem;
    font-weight: 800;
    text-align: center;
    transition: background 0.2s ease, transform 0.2s ease;
}

button:hover {
    background: var(--login-verde-oscuro) !important;
    transform: translateY(-1px);
}

.signup {
    font-size: 1rem;
    color: var(--login-texto);
    text-align: center !important;
}

.signup a {
    color: var(--login-verde);
    font-weight: 800;
    text-decoration: none;
}

.signup a:hover {
    color: var(--login-verde-oscuro);
    text-decoration: underline;
}

input:focus,
button:focus {
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(243, 178, 58, 0.28);
}

.imageSalud {
    display: block;
    width: 100%;
    max-height: 150px;
    object-fit: contain;
    border-radius: 8px;
}

.dark-mode body,
body.dark-mode {
    background: #121f21;
}

.dark-mode .form {
    background: #1e2a2c;
    color: #eaf5f6;
    border-color: #355054;
}

.dark-mode .title,
.dark-mode .system-title,
.dark-mode .form-input label,
.dark-mode .signup {
    color: #eaf5f6;
}

.dark-mode .form-input input {
    background: #132326;
    color: #ffffff;
    border-color: #355054;
}

@media screen and (max-width: 400px) {
    body {
        padding: 12px;
    }

    .form {
        padding: 22px 16px;
    }

    .circle {
        margin-left: 10px;
    }
}