/* Tela de abertura exclusiva do login; não modifica login-premium.css. */
.lb-intro {
    position: fixed;
    inset: 0;
    z-index: 99999;
    display: grid;
    place-items: center;
    background: #f5eee3;
    opacity: 1;
    visibility: visible;
    transition: opacity .6s ease, visibility .6s ease;
}
.lb-intro-content {
    width: min(300px, 78vw);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.lb-intro-logo {
    display: block;
    width: min(225px, 65vw);
    max-height: 190px;
    object-fit: contain;
    animation: lb-logo-reveal 1.7s cubic-bezier(.2,.7,.25,1) both;
}
.lb-intro-subtitle {
    margin-top: 6px;
    font: 500 11px 'DM Sans', Arial, sans-serif;
    letter-spacing: .42em;
    text-indent: .42em;
    color: #9d784c;
    animation: lb-subtitle-reveal 1.3s ease .2s both;
}
.lb-intro-track {
    margin-top: 30px;
    width: 150px;
    height: 2px;
    overflow: hidden;
    background: #dfd0bc;
    border-radius: 3px;
}
.lb-intro-progress {
    display: block;
    width: 100%;
    height: 100%;
    background: #9d784c;
    transform-origin: left;
    animation: lb-progress 2.05s ease-in-out both;
}
.lb-intro.lb-intro-exit { opacity: 0; visibility: hidden; pointer-events: none; }
@keyframes lb-logo-reveal {
    from { opacity: 0; transform: translateY(14px) scale(.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes lb-subtitle-reveal {
    from { opacity: 0; transform: translateY(7px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes lb-progress {
    from { transform: scaleX(0); }
    to { transform: scaleX(1); }
}
@media (prefers-reduced-motion: reduce) {
    .lb-intro-logo, .lb-intro-subtitle, .lb-intro-progress { animation: none; }
    .lb-intro { transition-duration: .05s; }
}