/* =========================================================
   Sistema de Inventario V&V — Design tokens
   Paleta: blanco base + "índigo señal" (control técnico) +
   "cian pulso" (estado / tecnología) + ámbar de alerta.
   ========================================================= */
:root {
    --blanco: #ffffff;
    --hueso: #f6f7fb;
    --gris-borde: #e6e8f0;
    --gris-texto: #6b7280;
    --tinta: #10152b;              /* texto principal, casi negro-índigo */
    --indigo: #23306b;              /* primario, "torre de control" */
    --indigo-suave: #eef0fa;
    --cian: #0ea5b7;                /* acento tecnológico */
    --cian-suave: #e4f7f9;
    --ambar: #d97b1f;               /* alertas */
    --ambar-suave: #fdf1e2;
    --rojo: #c23b3b;
    --rojo-suave: #fbeaea;
    --verde: #1f8a5f;
    --verde-suave: #e7f6ef;
    --radio: 14px;
    --radio-sm: 9px;
    --sombra: 0 8px 30px -12px rgba(16, 21, 43, 0.18);
    --sombra-sm: 0 2px 10px -4px rgba(16, 21, 43, 0.12);
    --fuente-display: 'Space Grotesk', 'Segoe UI', sans-serif;
    --fuente-cuerpo: 'Inter', 'Segoe UI', sans-serif;
    --fuente-mono: 'JetBrains Mono', 'Consolas', monospace;
}

* { box-sizing: border-box; }
html, body {
    margin: 0;
    padding: 0;
    background: var(--hueso);
    color: var(--tinta);
    font-family: var(--fuente-cuerpo);
    -webkit-font-smoothing: antialiased;
}
body { min-height: 100vh; }
a { color: inherit; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--cian-suave); color: var(--indigo); }

:focus-visible {
    outline: 2px solid var(--cian);
    outline-offset: 2px;
}

/* ---------- Utilidades tipográficas ---------- */
h1, h2, h3 { font-family: var(--fuente-display); letter-spacing: -0.01em; margin: 0; }
.mono { font-family: var(--fuente-mono); }

/* =========================================================
   PANTALLA DE LOGIN
   ========================================================= */
.login-shell {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
}
@media (max-width: 900px) {
    .login-shell { grid-template-columns: 1fr; }
    .login-visual { display: none; }
}

.login-visual {
    background: radial-gradient(circle at 20% 20%, #2c3a80 0%, var(--indigo) 45%, #161d47 100%);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 56px;
    color: #fff;
}
.login-visual::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(90deg, rgba(255,255,255,0.05) 0, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 64px),
        repeating-linear-gradient(0deg, rgba(255,255,255,0.05) 0, rgba(255,255,255,0.05) 1px, transparent 1px, transparent 64px);
    pointer-events: none;
}
.login-visual .grafo {
    position: absolute;
    right: -60px;
    bottom: -60px;
    width: 420px;
    height: 420px;
    opacity: 0.55;
}
.login-visual-top img { height: 34px; filter: brightness(0) invert(1); }
.login-visual-copy { position: relative; z-index: 1; max-width: 420px; }
.login-visual-copy .eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: 12px;
    color: #9db2ff;
    font-weight: 600;
}
.login-visual-copy h1 {
    font-size: 34px;
    line-height: 1.15;
    margin-top: 14px;
    font-weight: 600;
}
.login-visual-copy p {
    color: #c3cdf5;
    margin-top: 14px;
    line-height: 1.6;
    font-size: 14.5px;
}
.login-stats {
    position: relative;
    z-index: 1;
    display: flex;
    gap: 32px;
    margin-top: 40px;
}
.login-stats div strong { display: block; font-size: 26px; font-family: var(--fuente-display); }
.login-stats div span { font-size: 12px; color: #9db2ff; }

.login-form-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}
.login-card { width: 100%; max-width: 380px; }
.login-card .logo-mobile { display: none; height: 30px; margin-bottom: 28px; }
@media (max-width: 900px) {
    .login-card .logo-mobile { display: block; }
}
.login-card h2 { font-size: 24px; }
.login-card .sub { color: var(--gris-texto); font-size: 14px; margin-top: 6px; margin-bottom: 32px; }

.campo { margin-bottom: 18px; position: relative; }
.campo label {
    display: block;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--indigo);
    margin-bottom: 6px;
    letter-spacing: 0.01em;
}
.campo input, .campo select, .campo textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1.5px solid var(--gris-borde);
    border-radius: var(--radio-sm);
    background: var(--blanco);
    font-size: 14.5px;
    color: var(--tinta);
    transition: border-color .18s ease, box-shadow .18s ease, transform .12s ease;
}
.campo input:hover, .campo select:hover, .campo textarea:hover { border-color: #c7cce3; }
.campo input:focus, .campo select:focus, .campo textarea:focus {
    outline: none;
    border-color: var(--cian);
    box-shadow: 0 0 0 4px var(--cian-suave);
}
.campo select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%2323306b' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 34px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radio-sm);
    border: none;
    font-weight: 600;
    font-size: 14px;
    transition: transform .12s ease, box-shadow .18s ease, background .18s ease;
}
.btn-primario { background: var(--indigo); color: #fff; width: 100%; }
.btn-primario:hover { background: #1a2455; box-shadow: var(--sombra-sm); transform: translateY(-1px); }
.btn-secundario { background: var(--blanco); color: var(--indigo); border: 1.5px solid var(--gris-borde); }
.btn-secundario:hover { border-color: var(--indigo); background: var(--indigo-suave); }
.btn-peligro { background: var(--rojo-suave); color: var(--rojo); }
.btn-peligro:hover { background: var(--rojo); color: #fff; }
.btn-ghost { background: transparent; color: var(--indigo); padding: 8px 12px; }
.btn-ghost:hover { background: var(--indigo-suave); }
.btn-sm { padding: 7px 12px; font-size: 12.5px; }
.btn[disabled] { opacity: .55; cursor: not-allowed; transform: none !important; }

.error-msg {
    background: var(--rojo-suave);
    color: var(--rojo);
    padding: 11px 14px;
    border-radius: var(--radio-sm);
    font-size: 13.5px;
    margin-bottom: 16px;
    display: none;
}
.error-msg.visible { display: block; }

.demo-credenciales {
    margin-top: 26px;
    padding: 12px 14px;
    background: var(--indigo-suave);
    border-radius: var(--radio-sm);
    font-size: 12px;
    color: var(--indigo);
    line-height: 1.6;
}

/* =========================================================
   APP SHELL (dashboard)
   ========================================================= */
.app-shell { display: grid; grid-template-columns: 240px 1fr; min-height: 100vh; }
@media (max-width: 980px) { .app-shell { grid-template-columns: 1fr; } }

.sidebar {
    background: var(--indigo);
    color: #fff;
    padding: 26px 18px;
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}
@media (max-width: 980px) {
    .sidebar { position: static; height: auto; flex-direction: row; align-items: center; justify-content: space-between; padding: 14px 18px; }
    .sidebar .nav, .sidebar .sidebar-footer { display: none; }
}
.sidebar .logo-box { display: flex; align-items: center; gap: 10px; margin-bottom: 34px; }
.sidebar .logo-box img { height: 26px; filter: brightness(0) invert(1); }
.sidebar .nav { display: flex; flex-direction: column; gap: 3px; flex: 1; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 13px;
    border-radius: var(--radio-sm);
    color: #b7c0ec;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: background .15s ease, color .15s ease;
    border: none;
    background: transparent;
    text-align: left;
    width: 100%;
}
.nav-item:hover { background: rgba(255,255,255,.08); color: #fff; }
.nav-item.activo { background: #fff; color: var(--indigo); }
.nav-item .badge-count {
    margin-left: auto;
    background: var(--ambar);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    border-radius: 20px;
    padding: 1px 7px;
}
.sidebar-footer { border-top: 1px solid rgba(255,255,255,.12); padding-top: 16px; font-size: 12.5px; color: #b7c0ec; }
.sidebar-footer strong { color: #fff; display: block; font-size: 13.5px; }

.main {
    padding: 30px 36px 60px;
    max-width: 1400px;
}
@media (max-width: 700px) { .main { padding: 20px 16px 60px; } }

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
    gap: 16px;
    flex-wrap: wrap;
}
.topbar h1 { font-size: 24px; }
.topbar .sub { color: var(--gris-texto); font-size: 13.5px; margin-top: 4px; }
.topbar-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

.icon-btn {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: var(--blanco);
    border: 1.5px solid var(--gris-borde);
    position: relative;
    transition: border-color .15s ease, transform .12s ease;
}
.icon-btn:hover { border-color: var(--indigo); transform: translateY(-1px); }
.icon-btn .dot {
    position: absolute; top: 6px; right: 6px;
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--ambar);
    border: 2px solid var(--blanco);
    display: none;
}
.icon-btn .dot.visible { display: block; }

/* Tarjetas KPI */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 26px; }
@media (max-width: 980px) { .kpi-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .kpi-grid { grid-template-columns: 1fr; } }

.kpi-card {
    background: var(--blanco);
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    padding: 18px 20px;
    transition: box-shadow .18s ease, transform .18s ease;
}
.kpi-card:hover { box-shadow: var(--sombra); transform: translateY(-2px); }
.kpi-card .label { font-size: 12.5px; color: var(--gris-texto); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; }
.kpi-card .valor { font-family: var(--fuente-display); font-size: 30px; margin-top: 6px; }
.kpi-card .pie { font-size: 12px; margin-top: 6px; color: var(--gris-texto); }
.kpi-card.acento-cian { border-top: 3px solid var(--cian); }
.kpi-card.acento-ambar { border-top: 3px solid var(--ambar); }
.kpi-card.acento-indigo { border-top: 3px solid var(--indigo); }
.kpi-card.acento-verde { border-top: 3px solid var(--verde); }

/* Panel de filtros */
.panel {
    background: var(--blanco);
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    padding: 20px;
    margin-bottom: 20px;
}
.filtros-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; align-items: end; }
@media (max-width: 1100px) { .filtros-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .filtros-grid { grid-template-columns: repeat(2, 1fr); } }
.filtros-grid .campo { margin-bottom: 0; }
.filtros-grid label { font-size: 11px; color: var(--gris-texto); text-transform: uppercase; letter-spacing: .04em; }

.chip-alerta {
    display: inline-flex; align-items: center; gap: 6px;
    background: var(--ambar-suave); color: var(--ambar);
    padding: 6px 12px; border-radius: 20px; font-size: 12.5px; font-weight: 600;
    border: 1px solid transparent;
    transition: all .15s ease;
}
.chip-alerta:hover { border-color: var(--ambar); }
.chip-alerta.activo { background: var(--ambar); color: #fff; }

/* Tabla */
.tabla-wrap {
    background: var(--blanco);
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    overflow: hidden;
}
.tabla-scroll { overflow-x: auto; }
table.tabla-inventario { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 1100px; }
table.tabla-inventario thead th {
    text-align: left;
    padding: 13px 16px;
    background: var(--hueso);
    color: var(--gris-texto);
    font-weight: 600;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: .04em;
    border-bottom: 1px solid var(--gris-borde);
    white-space: nowrap;
}
table.tabla-inventario tbody td {
    padding: 13px 16px;
    border-bottom: 1px solid #f0f1f7;
    white-space: nowrap;
    color: var(--tinta);
}
table.tabla-inventario tbody tr { transition: background .12s ease; }
table.tabla-inventario tbody tr:hover { background: var(--indigo-suave); }
table.tabla-inventario tbody tr.fila-alerta { background: var(--ambar-suave); }
table.tabla-inventario tbody tr.fila-alerta:hover { background: #fbe6c9; }

.badge-estado {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 700;
}
.badge-estado.OPTIMO { background: var(--verde-suave); color: var(--verde); }
.badge-estado.BUENO { background: var(--cian-suave); color: #0a7788; }
.badge-estado.REGULAR { background: var(--ambar-suave); color: var(--ambar); }
.badge-estado.MALO { background: var(--rojo-suave); color: var(--rojo); }
.badge-estado.SINEVALUAR { background: #eee; color: #888; }

.tag-antiguo {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 11px; font-weight: 700; color: var(--rojo);
}

.acciones-fila { display: flex; gap: 6px; }
.acciones-fila button {
    width: 30px; height: 30px; border-radius: 8px;
    border: 1px solid var(--gris-borde); background: var(--blanco);
    display: flex; align-items: center; justify-content: center;
    transition: all .15s ease;
}
.acciones-fila button:hover { border-color: var(--indigo); background: var(--indigo-suave); }
.acciones-fila button.borrar:hover { border-color: var(--rojo); background: var(--rojo-suave); }

.tabla-vacia { padding: 60px 20px; text-align: center; color: var(--gris-texto); }

/* Modal */
.overlay {
    position: fixed; inset: 0; background: rgba(16,21,43,.5);
    display: none; align-items: flex-start; justify-content: center;
    padding: 40px 16px; overflow-y: auto; z-index: 100;
    backdrop-filter: blur(2px);
}
.overlay.visible { display: flex; }
.modal {
    background: var(--blanco); border-radius: 18px; width: 100%; max-width: 760px;
    padding: 28px 30px 30px; box-shadow: 0 30px 60px -20px rgba(16,21,43,.4);
    animation: aparecer .18s ease;
}
.modal.modal-sm { max-width: 460px; }
@keyframes aparecer { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.modal-header h3 { font-size: 19px; }
.modal-header button { background: none; border: none; font-size: 20px; color: var(--gris-texto); }
.modal-header button:hover { color: var(--tinta); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 16px; }
.form-grid .full { grid-column: 1 / -1; }
@media (max-width: 600px) { .form-grid { grid-template-columns: 1fr; } }
.modal-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; }

/* Notificaciones pop-up (dropdown) */
.panel-notif {
    position: absolute; top: 54px; right: 0; width: 360px;
    background: var(--blanco); border: 1px solid var(--gris-borde); border-radius: var(--radio);
    box-shadow: var(--sombra); z-index: 60; display: none; max-height: 420px; overflow-y: auto;
}
.panel-notif.visible { display: block; }
.panel-notif-header { padding: 14px 18px; border-bottom: 1px solid var(--gris-borde); display: flex; justify-content: space-between; align-items: center; }
.panel-notif-header h4 { font-size: 14px; }
.notif-item { padding: 13px 18px; border-bottom: 1px solid #f2f3f8; display: flex; gap: 10px; }
.notif-item:hover { background: var(--hueso); }
.notif-item .icono { width: 30px; height: 30px; border-radius: 8px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; background: var(--ambar-suave); color: var(--ambar); }
.notif-item .txt { font-size: 12.5px; line-height: 1.5; }
.notif-item .txt strong { display: block; font-size: 12px; color: var(--gris-texto); font-weight: 600; margin-bottom: 2px; }
.notif-vacio { padding: 40px 20px; text-align: center; color: var(--gris-texto); font-size: 13px; }

/* Toast */
#toast-wrap { position: fixed; bottom: 24px; right: 24px; z-index: 200; display: flex; flex-direction: column; gap: 10px; }
.toast {
    background: var(--tinta); color: #fff; padding: 13px 18px; border-radius: 10px;
    font-size: 13.5px; box-shadow: var(--sombra); display: flex; align-items: center; gap: 10px;
    animation: entrar .18s ease;
}
.toast.exito { background: var(--verde); }
.toast.error { background: var(--rojo); }
@keyframes entrar { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Popup flotante de alerta crítica al cargar */
.popup-alerta {
    position: fixed; inset: 0; background: rgba(16,21,43,.55);
    display: none; align-items: center; justify-content: center; z-index: 150; padding: 20px;
}
.popup-alerta.visible { display: flex; }
.popup-alerta-card {
    background: var(--blanco); border-radius: 20px; max-width: 440px; width: 100%;
    padding: 30px; text-align: center; animation: aparecer .2s ease;
}
.popup-alerta-card .icono-grande {
    width: 60px; height: 60px; border-radius: 50%; background: var(--ambar-suave); color: var(--ambar);
    display: flex; align-items: center; justify-content: center; margin: 0 auto 18px;
}
.popup-alerta-card h3 { font-size: 19px; margin-bottom: 8px; }
.popup-alerta-card p { color: var(--gris-texto); font-size: 13.5px; line-height: 1.6; margin-bottom: 22px; }

/* Pestañas de administración de usuarios */
.tabla-usuarios td, .tabla-usuarios th { padding: 12px 16px; }
.rol-pill { padding: 3px 10px; border-radius: 20px; font-size: 11px; font-weight: 700; }
.rol-pill.admin { background: var(--indigo-suave); color: var(--indigo); }
.rol-pill.editor { background: var(--cian-suave); color: #0a7788; }
.rol-pill.lector { background: #eee; color: #888; }

/* Loader */
.spinner {
    width: 18px; height: 18px; border-radius: 50%;
    border: 2.5px solid rgba(255,255,255,.4); border-top-color: #fff;
    animation: girar .7s linear infinite;
}
@keyframes girar { to { transform: rotate(360deg); } }

.vacio-estado { text-align: center; padding: 70px 20px; color: var(--gris-texto); }
.vacio-estado h3 { color: var(--tinta); font-size: 17px; margin-bottom: 8px; }

.helper-text { font-size: 11.5px; color: var(--gris-texto); margin-top: 5px; }