.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    padding: 1rem;
    box-sizing: border-box;
}

.login-card {
    width: 100%;
    max-width: 480px;
    padding: 32px;
    background-color: #ffffff;
    border-radius: 16px;
    border: 1px solid #eaedf3;
    box-shadow: 0 8px 24px rgba(16, 24, 40, 0.04);
    text-align: center;
    box-sizing: border-box;
    position: relative;
}

.login-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--brand-color);
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
    box-shadow: 0 0 18px rgba(0, 0, 0, 0.05);
}

.login-logo {
    display: block;
    margin: 8px auto 20px auto;
    width: 160px;
    max-width: 80%;
    height: auto;
}

.login-card h3 {
    margin: 4px 0 8px 0;
    font-weight: 700;
    font-size: 1.35rem;
    color: #0f172a;
}

.card-body {
    margin-top: 20px;
}

.form-group {
    margin-bottom: 16px;
    text-align: left;
}

.col-form-label {
    display: inline-block;
    margin-bottom: 6px;
    color: #334155;
    font-weight: 600;
}

.form-control {
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 16px;
    width: 100%;
    height: 44px;
    transition: border-color .2s ease, box-shadow .2s ease;
    box-sizing: border-box;
}

.form-control:focus {
    outline: none;
    border-color: var(--brand-color);
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.04);
}

.form-control::placeholder { color: #94a3b8; }

.btn-custom {
    color: #fff;
    padding: 12px 20px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
}

.invalid-feedback { color: #dc2626; }

/* ================================
   RESPONSIVE STYLES - Mobile First
   ================================ */

/* Mobile (< 576px) */
@media (max-width: 575.98px) {
    .login-container { padding: 0.5rem; }
    .login-card { padding: 24px 18px; border-radius: 14px; }
    .login-card h3 { font-size: 1.2rem; }
    .login-logo { width: 140px; }
    .card-body { margin-top: 14px; }
    .form-group { margin-bottom: 14px; }
    .form-control { padding: 11px 12px; font-size: 16px; }
    .btn-custom { padding: 12px 18px; font-size: 16px; }
    .col-form-label { font-size: 0.93rem; }
}

/* Tablet (576px - 767px) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .login-card { max-width: 440px; padding: 28px; }
    .login-logo { width: 150px; }
}

/* Prevent horizontal scroll */
html,
body {
    overflow-x: hidden;
}

/* Fin ajustes */

/* Fix for iOS input zoom */
input[type="text"],
input[type="password"],
input[type="email"] {
    font-size: 16px;
}