:root {
    --color-rojo: #b91c1c;
    --color-rojo-oscuro: #991b1b;
    --color-azul-marino: #172554;
    --color-negro: #111827;
    --color-gris-texto: #4b5563;
    --color-gris-claro: #e5e7eb;
    --color-fondo: #f3f4f6;
    --color-blanco: #ffffff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--color-negro);
}

.login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #f8fafc 0%, #eef2f7 100%);
}

.login-container {
    min-height: 100vh;
    padding: 32px 16px;

    display: flex;
    align-items: center;
    justify-content: center;
}

.login-card {
    width: min(92%, 390px);
    max-width: 440px;
    padding: 36px;

    background-color: var(--color-blanco);
    border: 1px solid var(--color-gris-claro);
    border-top: 5px solid var(--color-rojo);
    border-radius: 14px;

    box-shadow: 0 18px 45px rgba(17, 24, 39, 0.12);
}

.login-header {
    margin-bottom: 20px;
    text-align: center;
}

.logo-container {
    min-height: 100px;
    margin-bottom: 18px;

    display: flex;
    align-items: center;
    justify-content: center;
}

.school-logo {
    display: block;
    width: auto;
    max-width: 150px;
    max-height: 100px;
    object-fit: contain;
}

.login-title {
    font-size: 1.5rem; /* 24px */
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-azul-marino);
}

.login-subtitle {
    margin: 10px 0 0;
    color: var(--color-gris-texto);
    font-size: 12px;
    font-weight: bolder;
    line-height: 1.5;
}

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

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    color: var(--color-negro);
    font-size: 14px;
    font-weight: 700;
}

.form-group input {
    width: 100%;
    height: 46px;
    padding: 0 14px;

    background-color: var(--color-blanco);
    border: 1px solid #cbd5e1;
    border-radius: 8px;

    color: var(--color-negro);
    font-size: 15px;

    transition:
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.form-group input::placeholder {
    color: #9ca3af;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-azul-marino);
    box-shadow: 0 0 0 3px rgba(23, 37, 84, 0.12);
}

.captcha-container {
    display: flex;
    justify-content: center;
}

.login-button {
    width: 100%;
    min-height: 46px;

    border: none;
    border-radius: 8px;

    background-color: var(--color-azul-marino);
    color: var(--color-blanco);

    font-size: 15px;
    font-weight: 700;
    cursor: pointer;

    transition:
        background-color 0.2s ease,
        transform 0.2s ease;
}

.login-button:hover {
    background-color: #0f1d44;
}

.login-button:active {
    transform: translateY(1px);
}

.login-button:focus {
    outline: 3px solid rgba(185, 28, 28, 0.25);
    outline-offset: 2px;
}

.alert {
    margin-bottom: 22px;
    padding: 14px 16px;

    border-radius: 8px;

    font-size: 14px;
    line-height: 1.5;
}

.alert strong {
    display: block;
    margin-bottom: 6px;
}

.alert ul {
    margin: 6px 0 0;
    padding-left: 20px;
}

.alert-success {
    background-color: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #166534;
}

.alert-error {
    background-color: #fef2f2;
    border: 1px solid #fecaca;
    color: #991b1b;
}

.field-error {
    margin: -10px 0 0;
    color: var(--color-rojo);
    font-size: 13px;
}

@media (max-width: 520px) {
    .login-container {
        padding: 20px 12px;
    }

    .login-card {
        padding: 28px 22px;
        border-radius: 10px;
    }

    .login-title {
        font-size: 23px;
    }

    .logo-container {
        min-height: 85px;
    }

    .school-logo {
        width: clamp(90px, 18vw, 120px);
        height: auto;
    }
}