/* =====================================================================
   Plataforma TI v1.2 - Xtreme Mining Ltda.
   Diseño corporativo sobrio: superficies planas, bordes de 1px,
   radios mínimos (3px), iconografía monocroma de trazo fino y un
   único acento cobre. Sin gradientes, sin sombras decorativas.
   ===================================================================== */

:root {
    --bg: #eef0f2;
    --surface: #ffffff;
    --surface-2: #f6f7f8;
    --line: #d8dbdf;
    --line-strong: #b9bec4;
    --ink: #191c20;
    --ink-2: #5b6169;
    --ink-3: #8a9098;
    --accent: #9a5426;          /* cobre apagado */
    --accent-dark: #7c4520;
    --accent-soft: #f4ece5;
    --sidebar-bg: #16191d;
    --sidebar-line: #262b31;
    --sidebar-ink: #9aa1a9;
    --sidebar-ink-strong: #e8eaec;
    --ok: #2e6b3f;
    --ok-soft: #e7f0ea;
    --warn: #8a6410;
    --warn-soft: #f7f0dd;
    --err: #93312b;
    --err-soft: #f7e8e6;
    --radius: 3px;
    --sidebar-w: 248px;
    --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: "Consolas", "SF Mono", ui-monospace, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body { height: 100%; }

body {
    font-family: var(--font);
    font-size: 14px;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

button { font-family: inherit; }
a { color: var(--accent-dark); }

/* ---------- utilidades ---------- */
.eyebrow {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.mono { font-family: var(--mono); font-size: 13px; }
.muted { color: var(--ink-2); }
.hidden { display: none !important; }

/* =====================================================================
   LOGIN
   ===================================================================== */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    padding: 24px;
}
.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-top: 3px solid var(--accent);
    border-radius: var(--radius);
    padding: 36px 32px 32px;
}
.login-card h1 {
    font-size: 19px;
    font-weight: 600;
    letter-spacing: -.01em;
}
.login-sub {
    margin: 4px 0 26px;
    color: var(--ink-2);
    font-size: 13px;
}
.login-brand {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
}
.login-brand .brand-mark {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .14em;
    color: var(--accent);
}

/* =====================================================================
   LAYOUT PRINCIPAL
   ===================================================================== */
.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    background: var(--sidebar-bg);
    color: var(--sidebar-ink);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.sidebar-header {
    padding: 20px 18px 16px;
    border-bottom: 1px solid var(--sidebar-line);
}
.sidebar-header .brand-mark {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .16em;
    color: var(--accent);
    text-transform: uppercase;
}
.sidebar-header .brand-name {
    margin-top: 2px;
    font-size: 15px;
    font-weight: 600;
    color: var(--sidebar-ink-strong);
    letter-spacing: -.01em;
}

/* ---------- navegación acordeón ---------- */
.nav { flex: 1; padding: 10px 0; }

.nav-group { border-bottom: 1px solid transparent; }

.nav-mod {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 10px 18px;
    background: none;
    border: none;
    border-left: 2px solid transparent;
    color: var(--sidebar-ink);
    font-size: 13.5px;
    text-align: left;
    cursor: pointer;
}
.nav-mod:hover { color: var(--sidebar-ink-strong); background: rgba(255,255,255,.03); }
.nav-mod .nav-icon {
    width: 18px; height: 18px;
    flex: 0 0 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.nav-mod .nav-label { flex: 1; }
.nav-mod .nav-chevron {
    width: 14px; height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.5;
    opacity: .55;
    transition: transform .16s ease;
}
.nav-group.open .nav-chevron { transform: rotate(90deg); }
.nav-group.active > .nav-mod {
    color: var(--sidebar-ink-strong);
    border-left-color: var(--accent);
    background: rgba(255,255,255,.04);
}

.nav-sub {
    overflow: hidden;
    max-height: 0;
    transition: max-height .18s ease;
}
.nav-group.open .nav-sub { max-height: 320px; }

.nav-sub a {
    display: block;
    padding: 7px 18px 7px 47px;
    font-size: 13px;
    color: var(--sidebar-ink);
    text-decoration: none;
    border-left: 2px solid transparent;
}
.nav-sub a:hover { color: var(--sidebar-ink-strong); }
.nav-sub a.active {
    color: var(--sidebar-ink-strong);
    border-left-color: var(--accent);
    background: rgba(255,255,255,.05);
}

.sidebar-footer {
    padding: 14px 18px;
    border-top: 1px solid var(--sidebar-line);
    font-size: 12px;
}
.sidebar-footer .sf-user { color: var(--sidebar-ink-strong); font-weight: 600; }
.sidebar-footer .sf-rol { color: var(--sidebar-ink); text-transform: capitalize; }
.sidebar-footer button {
    margin-top: 8px;
    width: 100%;
    padding: 6px 0;
    background: none;
    border: 1px solid var(--sidebar-line);
    border-radius: var(--radius);
    color: var(--sidebar-ink);
    font-size: 12px;
    cursor: pointer;
}
.sidebar-footer button:hover { color: var(--sidebar-ink-strong); border-color: var(--line-strong); }

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

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    padding: 14px 28px;
    display: flex;
    align-items: baseline;
    gap: 12px;
}
.topbar h2 { font-size: 16px; font-weight: 600; letter-spacing: -.01em; }
.topbar .ruta { font-size: 12.5px; color: var(--ink-3); }

.content { padding: 24px 28px 48px; max-width: 1240px; width: 100%; }

/* =====================================================================
   COMPONENTES
   ===================================================================== */
.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    margin-bottom: 18px;
}
.card-header {
    padding: 13px 18px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.card-header h3 { font-size: 14px; font-weight: 600; }
.card-body { padding: 18px; }
.card-footer {
    padding: 12px 18px;
    border-top: 1px solid var(--line);
    background: var(--surface-2);
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    border-radius: 0 0 var(--radius) var(--radius);
}

/* ---------- formularios ---------- */
.field { margin-bottom: 14px; }
.field label {
    display: block;
    margin-bottom: 5px;
    font-size: 12px;
    font-weight: 600;
    color: var(--ink-2);
    letter-spacing: .03em;
}
.field .hint { margin-top: 4px; font-size: 12px; color: var(--ink-3); }
.field input[type="text"],
.field input[type="password"],
.field input[type="number"],
.field input[type="url"],
.field input[type="date"],
.field select,
.field textarea {
    width: 100%;
    padding: 8px 10px;
    font-family: inherit;
    font-size: 13.5px;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    outline: none;
}
.field input:focus, .field select:focus, .field textarea:focus {
    border-color: var(--accent);
}
.field-row { display: flex; gap: 14px; }
.field-row .field { flex: 1; }

.check {
    display: flex; align-items: center; gap: 8px;
    font-size: 13.5px; cursor: pointer;
}
.check input { accent-color: var(--accent); width: 15px; height: 15px; }

/* ---------- botones ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    text-decoration: none;
}
.btn:hover { background: var(--surface-2); }
.btn:disabled { opacity: .5; cursor: default; }
.btn svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }

.btn-quiet { border-color: transparent; background: none; color: var(--ink-2); }
.btn-quiet:hover { background: var(--surface-2); color: var(--ink); }

.btn-danger { color: var(--err); border-color: var(--err); background: var(--surface); }
.btn-danger:hover { background: var(--err-soft); }

.btn-sm { padding: 5px 10px; font-size: 12.5px; }

/* ---------- tablas ---------- */
.table-wrap { overflow-x: auto; }
table.data {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}
table.data th {
    text-align: left;
    padding: 9px 14px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--ink-3);
    border-bottom: 1px solid var(--line-strong);
    background: var(--surface-2);
    white-space: nowrap;
}
table.data td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--line);
    vertical-align: middle;
}
table.data tr:last-child td { border-bottom: none; }
table.data tr:hover td { background: var(--surface-2); }
table.data .num { font-family: var(--mono); font-size: 12.5px; }

/* ---------- badges de estado ---------- */
.badge {
    display: inline-block;
    padding: 2px 9px;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: .03em;
    border-radius: var(--radius);
    border: 1px solid;
}
.badge.emitido  { color: var(--warn); border-color: var(--warn); background: var(--warn-soft); }
.badge.firmado  { color: var(--ok);   border-color: var(--ok);   background: var(--ok-soft); }
.badge.anulado  { color: var(--ink-3); border-color: var(--line-strong); background: var(--surface-2); }
.badge.borrador { color: var(--ink-2); border-color: var(--line-strong); background: var(--surface-2); }
.badge.tipo { color: var(--accent-dark); border-color: var(--accent); background: var(--accent-soft); font-family: var(--mono); }

/* ---------- alertas ---------- */
.alert {
    padding: 11px 14px;
    border: 1px solid;
    border-radius: var(--radius);
    font-size: 13px;
    margin-bottom: 14px;
}
.alert.ok   { color: var(--ok); border-color: var(--ok); background: var(--ok-soft); }
.alert.err  { color: var(--err); border-color: var(--err); background: var(--err-soft); }
.alert.info { color: var(--ink-2); border-color: var(--line-strong); background: var(--surface-2); }

/* ---------- tabs ---------- */
.tabs {
    display: flex;
    gap: 2px;
    border-bottom: 1px solid var(--line-strong);
    margin-bottom: 18px;
}
.tabs button {
    padding: 9px 16px;
    font-size: 13px;
    font-weight: 600;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--ink-2);
    cursor: pointer;
    margin-bottom: -1px;
}
.tabs button:hover { color: var(--ink); }
.tabs button.active { color: var(--accent-dark); border-bottom-color: var(--accent); }

/* ---------- modal ---------- */
.modal-back {
    position: fixed; inset: 0;
    background: rgba(20,22,25,.5);
    display: flex; align-items: center; justify-content: center;
    z-index: 200;
    padding: 24px;
}
.modal {
    width: 100%;
    max-width: 520px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    max-height: 90vh;
    overflow-y: auto;
}

/* ---------- toast ---------- */
#toast {
    position: fixed;
    bottom: 22px; right: 22px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
#toast .t {
    padding: 11px 16px;
    background: var(--ink);
    color: #fff;
    font-size: 13px;
    border-radius: var(--radius);
    border-left: 3px solid var(--accent);
}
#toast .t.err { border-left-color: #d0645c; }

/* ---------- dashboard ---------- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}
.stat {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 16px 18px;
}
.stat .stat-num {
    font-size: 26px;
    font-weight: 600;
    letter-spacing: -.02em;
    font-variant-numeric: tabular-nums;
    margin-top: 6px;
}

/* =====================================================================
   DOCUMENTOS (plantillas de impresión OS / NIAS / DENI)
   ===================================================================== */
.doc-sheet {
    background: #fff;
    border: 1px solid var(--line);
    max-width: 830px;
    margin: 0 auto;
    padding: 34px 42px;
    font-size: 12.5px;
    color: #17191c;
}
.doc-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 2px solid #17191c;
    padding-bottom: 12px;
    margin-bottom: 16px;
}
.doc-empresa { font-size: 15px; font-weight: 700; letter-spacing: .02em; }
.doc-empresa small { display: block; font-weight: 400; font-size: 11px; color: #555; margin-top: 2px; }
.doc-meta { text-align: right; font-size: 12px; }
.doc-meta .doc-titulo { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; }
.doc-meta .doc-num { font-family: var(--mono); font-size: 13px; margin-top: 3px; }

.doc-seccion { margin: 14px 0; }
.doc-seccion > .doc-sec-titulo {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    background: #f0f1f2;
    border: 1px solid #c9ccd0;
    border-bottom: none;
    padding: 5px 10px;
}
.doc-tabla { width: 100%; border-collapse: collapse; }
.doc-tabla td, .doc-tabla th {
    border: 1px solid #c9ccd0;
    padding: 5px 10px;
    font-size: 12px;
    text-align: left;
}
.doc-tabla th { background: #f7f8f8; font-weight: 600; width: 26%; }

.doc-check { list-style: none; }
.doc-check li {
    display: flex;
    gap: 9px;
    padding: 4px 0;
    font-size: 12px;
    align-items: baseline;
}
.doc-check li::before {
    content: "";
    width: 11px; height: 11px;
    border: 1.4px solid #17191c;
    flex: 0 0 11px;
    transform: translateY(1.5px);
}
.doc-check li.si::before { background: #17191c; box-shadow: inset 0 0 0 2px #fff; }

.doc-firmas {
    display: flex;
    gap: 40px;
    margin-top: 46px;
}
.doc-firma { flex: 1; text-align: center; font-size: 11.5px; }
.doc-firma .linea { border-top: 1px solid #17191c; padding-top: 6px; }
.doc-firma img { max-height: 70px; margin-bottom: 4px; }

.doc-pie {
    margin-top: 26px;
    padding-top: 8px;
    border-top: 1px solid #c9ccd0;
    font-size: 10.5px;
    color: #666;
    display: flex;
    justify-content: space-between;
}

@media print {
    body * { visibility: hidden; }
    .doc-sheet, .doc-sheet * { visibility: visible; }
    .doc-sheet {
        position: absolute; inset: 0;
        border: none; max-width: none; padding: 10mm 14mm;
    }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; min-width: 0; height: auto; position: static; }
    .content { padding: 16px; }
    .field-row { flex-direction: column; gap: 0; }
}