/* =============================================================================
   AD Panel - Hoja de estilos principal
   Dirección visual: panel de instrumentos de ingeniería.
   Sidebar "tinta" profunda, contenido claro tipo plano técnico, acento petróleo
   y etiquetas monoespaciadas. Sobrio, denso y legible para uso diario.
   ============================================================================= */

:root {
    /* Superficies oscuras (sidebar / header de marca) */
    --ink:       #0E141B;
    --ink-2:     #161F29;
    --ink-line:  rgba(255, 255, 255, 0.08);
    --ink-text:  #C6D0DA;
    --ink-muted: #7C8A98;

    /* Superficies claras (área de trabajo) */
    --surface:   #F4F6F8;
    --card:      #FFFFFF;
    --line:      #E3E7EC;
    --line-2:    #EDF0F3;
    --text:      #1A2330;
    --muted:     #66727F;

    /* Acento e indicadores de estado */
    --accent:    #0E7C86;
    --accent-2:  #0B5C63;
    --accent-bg: #E2F1F2;
    --ok:        #1F8A4C;
    --pending:   #B26A00;
    --off:       #8A94A0;
    --danger:    #C0392B;
    --danger-bg: #FBEAE8;

    /* Tipografía */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace;

    --radius: 8px;
    --radius-sm: 6px;
    --sidebar-w: 256px;
    --header-h: 60px;
    --shadow: 0 1px 2px rgba(16, 24, 32, 0.06), 0 1px 3px rgba(16, 24, 32, 0.04);
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background: var(--surface);
    color: var(--text);
    font-size: 14.5px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ----------------------------------------------------------------------------
   Estructura general: sidebar fijo + área principal
   ---------------------------------------------------------------------------- */
.app-shell { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */
.sidebar {
    width: var(--sidebar-w);
    flex: 0 0 var(--sidebar-w);
    background: var(--ink);
    color: var(--ink-text);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    /* Detalle "plano técnico": ticks tenues en el borde derecho */
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 23px,
        var(--ink-line) 23px,
        var(--ink-line) 24px
    );
    background-position: right;
    background-size: 8px 100%;
    background-repeat: no-repeat;
    border-right: 1px solid var(--ink-line);
}

.brand {
    height: var(--header-h);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 18px;
    border-bottom: 1px solid var(--ink-line);
}
.brand__mark {
    width: 28px; height: 28px;
    display: grid; place-items: center;
    background: var(--accent);
    color: #fff;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: -0.5px;
}
.brand__name { font-weight: 650; color: #fff; letter-spacing: 0.2px; }
.brand__name small {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    font-weight: 400;
    color: var(--ink-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav { padding: 14px 12px; overflow-y: auto; flex: 1; }
.nav__label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--ink-muted);
    padding: 16px 10px 6px;
}
.nav__label:first-child { padding-top: 4px; }

.nav__item {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    color: var(--ink-text);
    font-size: 14px;
    margin-bottom: 2px;
}
.nav__item:hover { background: var(--ink-2); text-decoration: none; color: #fff; }
.nav__item.is-active {
    background: var(--ink-2);
    color: #fff;
    box-shadow: inset 2px 0 0 var(--accent);
}
.nav__item .ico {
    width: 16px; height: 16px; flex: 0 0 16px;
    opacity: 0.85;
}

.sidebar__foot {
    padding: 12px 16px;
    border-top: 1px solid var(--ink-line);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--ink-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ---------- Área principal ---------- */
.main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; }

.topbar {
    height: var(--header-h);
    background: var(--card);
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 22px;
    position: sticky;
    top: 0;
    z-index: 20;
}
.topbar__left { display: flex; align-items: center; gap: 14px; min-width: 0; }

.crumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
    white-space: nowrap;
    overflow: hidden;
}
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--accent-2); }
.crumbs .sep { opacity: 0.5; }
.crumbs .current { color: var(--text); }

.topbar__right { display: flex; align-items: center; gap: 14px; }
.user-chip {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 13px;
}
.user-chip__avatar {
    width: 30px; height: 30px; border-radius: 50%;
    background: var(--accent-bg);
    color: var(--accent-2);
    display: grid; place-items: center;
    font-weight: 650; font-size: 12px;
    font-family: var(--font-mono);
}
.user-chip__name { font-weight: 550; }
.user-chip__role {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Botón hamburguesa (solo móvil) */
.menu-toggle {
    display: none;
    background: none; border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    width: 36px; height: 36px;
    cursor: pointer; color: var(--text);
}

/* ---------- Contenido ---------- */
.content { padding: 26px 28px 48px; max-width: 1180px; width: 100%; }

.page-head { margin-bottom: 22px; }
.page-head h1 {
    font-size: 22px;
    font-weight: 650;
    margin: 0 0 4px;
    letter-spacing: -0.3px;
}
.page-head p { margin: 0; color: var(--muted); }

/* Tira de métricas */
.metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 26px;
}
.metric {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 14px 16px;
}
.metric__value { font-size: 24px; font-weight: 700; letter-spacing: -0.5px; }
.metric__label {
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--muted);
}

/* Encabezado de sección */
.section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 30px 0 14px;
}
.section-title h2 {
    font-size: 13px;
    font-family: var(--font-mono);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--muted);
    font-weight: 600;
    margin: 0;
}
.section-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--line);
}

/* ---------- Tarjetas "instrumento" ---------- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
    gap: 14px;
}
.card {
    position: relative;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px 16px 14px;
    box-shadow: var(--shadow);
    transition: border-color 0.15s ease, transform 0.15s ease;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
a.card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.card__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.card__icon {
    width: 34px; height: 34px;
    border-radius: var(--radius-sm);
    background: var(--accent-bg);
    color: var(--accent-2);
    display: grid; place-items: center;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 13px;
}
.card__title { font-weight: 600; color: var(--text); margin: 0; font-size: 15px; }
.card__desc { color: var(--muted); font-size: 13px; margin: 0; flex: 1; }

/* LED + etiqueta de estado */
.status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--muted);
}
.led { width: 8px; height: 8px; border-radius: 50%; background: var(--off); flex: 0 0 8px; }
.status--available .led { background: var(--ok); box-shadow: 0 0 0 3px rgba(31, 138, 76, 0.15); }
.status--available { color: var(--ok); }
.status--pending .led { background: var(--pending); box-shadow: 0 0 0 3px rgba(178, 106, 0, 0.15); }
.status--pending { color: var(--pending); }
.status--disabled .led { background: var(--off); }

/* ---------- Aviso "no implementado" ---------- */
.notice {
    background: var(--card);
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    padding: 22px;
    color: var(--muted);
    display: flex;
    gap: 14px;
    align-items: flex-start;
}
.notice__mark {
    font-family: var(--font-mono);
    color: var(--pending);
    font-weight: 700;
    flex: 0 0 auto;
}

/* ---------- Mensajes flash ---------- */
.flash { margin-bottom: 18px; display: flex; flex-direction: column; gap: 8px; }
.alert {
    padding: 11px 14px;
    border-radius: var(--radius-sm);
    font-size: 13.5px;
    border: 1px solid transparent;
}
.alert--success { background: #E8F5EC; border-color: #BCE3C8; color: #1B6B3A; }
.alert--error   { background: var(--danger-bg); border-color: #F0C2BD; color: #97291C; }
.alert--info    { background: var(--accent-bg); border-color: #B9DDDF; color: var(--accent-2); }

/* ---------- Login ---------- */
.auth-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    background:
        radial-gradient(900px 500px at 80% -10%, rgba(14, 124, 134, 0.10), transparent 60%),
        var(--ink);
    padding: 24px;
}
.auth-card {
    width: 100%;
    max-width: 380px;
    background: var(--card);
    border-radius: 12px;
    padding: 30px 30px 26px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}
.auth-card__brand {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 22px;
}
.auth-card h1 { font-size: 18px; margin: 0 0 2px; }
.auth-card .sub { color: var(--muted); font-size: 13px; margin: 0 0 20px; }

.field { margin-bottom: 14px; }
.field label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}
.field input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    background: #fff;
    color: var(--text);
}
.field input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(14, 124, 134, 0.15);
}
.field__error { color: var(--danger); font-size: 12px; margin-top: 5px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-sans);
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-2); text-decoration: none; }
.btn--block { width: 100%; }
.btn--ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn--ghost:hover { background: var(--line-2); text-decoration: none; }

.auth-hint {
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    line-height: 1.7;
}

/* ---------- Errores (404/419/500) ---------- */
.errpage { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.errpage__box { text-align: center; max-width: 420px; }
.errpage__code {
    font-family: var(--font-mono);
    font-size: 64px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -2px;
}
.errpage h1 { font-size: 20px; margin: 4px 0 8px; }
.errpage p { color: var(--muted); margin: 0 0 20px; }

/* ---------- Logout inline ---------- */
.logout-form { display: inline; }
.logout-btn {
    background: none; border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 7px 12px; font-size: 13px; cursor: pointer;
    color: var(--text); font-family: var(--font-sans);
}
.logout-btn:hover { background: var(--line-2); }

/* ---------- Responsivo ---------- */
.sidebar__backdrop { display: none; }

@media (max-width: 860px) {
    .menu-toggle { display: grid; place-items: center; }
    .sidebar {
        position: fixed;
        z-index: 60;
        transform: translateX(-100%);
        transition: transform 0.2s ease;
    }
    body.nav-open .sidebar { transform: translateX(0); }
    body.nav-open .sidebar__backdrop {
        display: block;
        position: fixed; inset: 0;
        background: rgba(8, 12, 16, 0.5);
        z-index: 55;
    }
    .content { padding: 20px 16px 40px; }
    .user-chip__name, .user-chip__role { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}