/* ============================================================
   OVERLAY-FORM.CSS - CSS COMUN PARA FORMULARIOS GRANDES
   Overlay estandarizado de pagina para todo BANKAMBI
   (tema claro/oscuro automatico via body.dark-theme)
   Uso:
   <div class="form-overlay" id="miModal">
     <div class="form-overlay-box">
       <div class="form-overlay-header">
         <h3 class="form-overlay-title">Titulo</h3>
         <button class="form-overlay-close">&times;</button>
       </div>
       <div class="form-overlay-body"> ...formulario... </div>
       <div class="form-overlay-footer">
         <button class="fo-btn fo-btn-secondary">Cancelar</button>
         <button class="fo-btn fo-btn-primary">Guardar</button>
       </div>
     </div>
   </div>
   JS minimo: overlay.classList.add('active') / .remove('active')
   ============================================================ */

:root {
    --fo-bg: #ffffff;
    --fo-text-title: #1e293b;
    --fo-text-body: #475569;
    --fo-border: #E5E7EB;
    --fo-input-bg: #f8fafc;
    --fo-overlay: rgba(15, 23, 42, 0.55);
    --fo-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

body.dark-theme {
    --fo-bg: #1e293b;
    --fo-text-title: #f1f5f9;
    --fo-text-body: #94a3b8;
    --fo-border: #334155;
    --fo-input-bg: rgba(255, 255, 255, 0.05);
    --fo-overlay: rgba(0, 0, 0, 0.75);
    --fo-shadow: 0 20px 80px rgba(0, 0, 0, 0.6);
}

/* ---- Overlay ---- */
.form-overlay {
    position: fixed;
    inset: 0;
    background: var(--fo-overlay);
    backdrop-filter: blur(6px);
    z-index: 9998;
    display: none;
    align-items: flex-start;
    justify-content: center;
    padding: 4vh 16px;
    overflow-y: auto;
}

.form-overlay.active {
    display: flex;
    animation: fo-fade 0.25s ease;
}

@keyframes fo-fade {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ---- Caja ---- */
.form-overlay-box {
    background: var(--fo-bg);
    border: 1px solid var(--fo-border);
    border-radius: 20px;
    box-shadow: var(--fo-shadow);
    width: 100%;
    max-width: 640px;          /* ancho estandar; ampliable por pagina */
    animation: fo-pop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 8vh);
}

@keyframes fo-pop {
    from { transform: translateY(24px) scale(0.97); opacity: 0; }
    to { transform: translateY(0) scale(1); opacity: 1; }
}

.form-overlay-box.fo-lg { max-width: 900px; }
.form-overlay-box.fo-sm { max-width: 420px; }

/* ---- Header ---- */
.form-overlay-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 20px 26px;
    border-bottom: 1px solid var(--fo-border);
    flex-shrink: 0;
}

.form-overlay-title {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--fo-text-title);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-overlay-close {
    background: transparent;
    border: none;
    font-size: 1.8rem;
    line-height: 1;
    color: var(--fo-text-body);
    cursor: pointer;
    padding: 0 6px;
    border-radius: 8px;
    transition: all 0.15s;
}
.form-overlay-close:hover {
    color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
}

/* ---- Cuerpo (scrollable) ---- */
.form-overlay-body {
    padding: 22px 26px;
    overflow-y: auto;
    color: var(--fo-text-body);
    flex: 1;
}

/* Inputs heredan el tema */
.form-overlay-body input[type="text"],
.form-overlay-body input[type="email"],
.form-overlay-body input[type="number"],
.form-overlay-body input[type="date"],
.form-overlay-body select,
.form-overlay-body textarea {
    width: 100%;
    background: var(--fo-input-bg);
    border: 1px solid var(--fo-border);
    border-radius: 10px;
    padding: 10px 14px;
    color: var(--fo-text-title);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
}
.form-overlay-body input:focus,
.form-overlay-body select:focus,
.form-overlay-body textarea:focus {
    border-color: var(--primary-color, #2563eb);
}
.form-overlay-body label {
    display: block;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--fo-text-body);
    margin-bottom: 5px;
}
.form-overlay-body .fo-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}
@media (max-width: 600px) {
    .form-overlay-body .fo-row { grid-template-columns: 1fr; }
}

/* ---- Footer ---- */
.form-overlay-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 26px 22px;
    border-top: 1px solid var(--fo-border);
    flex-shrink: 0;
}

.fo-btn {
    padding: 11px 26px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}
.fo-btn-primary {
    background: var(--primary-color, #2563eb);
    color: #fff;
}
.fo-btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.fo-btn-danger {
    background: #ef4444;
    color: #fff;
}
.fo-btn-danger:hover { background: #dc2626; }
.fo-btn-secondary {
    background: transparent;
    border: 2px solid var(--fo-border);
    color: var(--fo-text-title);
}
.fo-btn-secondary:hover { background: var(--fo-border); }

/* ---- Movil: sheet inferior ---- */
@media (max-width: 640px) {
    .form-overlay { padding: 0; align-items: flex-end; }
    .form-overlay-box,
    .form-overlay-box.fo-lg {
        max-width: 100%;
        border-radius: 20px 20px 0 0;
        max-height: 92vh;
        animation: fo-slide-up 0.3s ease;
    }
    .form-overlay-footer { flex-direction: column-reverse; }
    .fo-btn { width: 100%; }
}
@keyframes fo-slide-up {
    from { transform: translateY(40px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Accesibilidad: respetar reduce-motion */
@media (prefers-reduced-motion: reduce) {
    .form-overlay.active,
    .form-overlay-box { animation: none !important; }
}