/* ======================================================
   LOGIN PAGE — Card Centrada · Escuela Aníbal Pinto
   ====================================================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --navy: #1a2a4a;
    --text-h: #111827;
    --text-p: #6b7280;
    --border: #e5e7eb;
    --radius: 14px;
    --trans: all 0.22s ease;
}

html,
body {
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* =========================================
   FONDO COMPLETO
   ========================================= */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    position: relative;
    overflow: hidden;

    /* Fondo teal oscuro */
    background: linear-gradient(160deg, #0a4040 0%, #083535 40%, #062828 100%);
}

/* Patrón de rombos dorados sobre el fondo */
.login-page::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cg fill='none' stroke='%23b8972a' stroke-width='0.6' stroke-opacity='0.3'%3E%3Cpolygon points='40,2 78,40 40,78 2,40'/%3E%3C/g%3E%3C/svg%3E");
    background-size: 80px 80px;
    pointer-events: none;
    z-index: 0;
}

/* Círculos decorativos de fondo */
.login-page::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(13, 148, 136, 0.12) 0%, transparent 70%);
    top: -150px;
    left: -150px;
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(184, 151, 42, 0.07) 0%, transparent 70%);
    bottom: -100px;
    right: -100px;
    pointer-events: none;
    z-index: 0;
}

/* =========================================
   CARD CENTRAL FLOTANTE
   ========================================= */
.login-card {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 480px;
    background: #ffffff;
    border-radius: 20px;
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.35), 0 8px 20px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

/* Franja superior de color */
.card-top-band {
    height: 6px;
    background: linear-gradient(90deg, #0d9488 0%, #b8972a 100%);
}

/* Contenido interior del card */
.card-body {
    padding: 44px 48px 40px;
}

/* Logo + nombre institución */
.card-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.card-brand img {
    width: 52px;
    height: auto;
    flex-shrink: 0;
}

.card-brand-text strong {
    display: block;
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text-h);
    line-height: 1.2;
}

.card-brand-text span {
    font-size: 0.75rem;
    color: var(--text-p);
    font-weight: 500;
    letter-spacing: 0.3px;
}

/* Heading del formulario */
.form-heading h2 {
    font-size: 1.7rem;
    font-weight: 800;
    color: var(--text-h);
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.form-heading p {
    font-size: 0.88rem;
    color: var(--text-p);
    margin-bottom: 28px;
}

/* Error */
.error-msg {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
    padding: 11px 14px;
    border-radius: 10px;
    font-size: 0.87rem;
    font-weight: 500;
    margin-bottom: 20px;
    animation: shake 0.4s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0)
    }

    20% {
        transform: translateX(-5px)
    }

    40% {
        transform: translateX(5px)
    }

    60% {
        transform: translateX(-3px)
    }

    80% {
        transform: translateX(3px)
    }
}

/* Inputs */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.83rem;
    font-weight: 700;
    color: var(--text-h);
    margin-bottom: 7px;
}

.input-wrapper {
    position: relative;
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    color: var(--text-h);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    background: #fff;
    transition: var(--trans);
}

.form-group input:focus {
    border-color: #0d9488;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.form-group input::placeholder {
    color: #d1d5db;
}

#password {
    padding-right: 44px;
}

.toggle-password {
    position: absolute;
    right: 13px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    color: #9ca3af;
    font-size: 0.88rem;
    padding: 0;
    transition: var(--trans);
}

.toggle-password:hover {
    color: var(--navy);
}

/* Botón */
.btn-login {
    width: 100%;
    padding: 13px;
    background: var(--navy);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    margin-top: 6px;
    transition: var(--trans);
    letter-spacing: 0.2px;
}

.btn-login:hover {
    background: #223566;
}

.btn-login:active {
    background: #111e3a;
}

/* Footer dentro del card */
.card-footer {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.78rem;
    color: #9ca3af;
    line-height: 1.6;
}

/* Volver — suelto sobre el fondo, encima del card */
.back-link {
    position: fixed;
    top: 24px;
    left: 28px;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 7px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--trans);
    padding: 7px 12px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.back-link:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

/* =========================================
   RESPONSIVE
   ========================================= */
@media (max-width: 540px) {
    .card-body {
        padding: 32px 28px 28px;
    }

    .login-card {
        border-radius: 16px;
    }
}