/* ── Nano ERP ────────────────────────────────────────────────────────────
   Monochrome: black background, white type, gray accents. */

:root {
    /* Le avisa al navegador que la interfaz es oscura, así los controles que
       dibuja el sistema (desplegables de los select, calendario de los
       input date, barras de scroll) salen oscuros y no en blanco. */
    color-scheme: dark;

    --bg: #08090b;
    --bg-elev: #131417;
    --panel: #131417;
    --panel-2: #1b1d21;
    --border: #2a2c31;
    --border-soft: #1e2024;
    --text: #f5f6f7;
    --text-dim: #9a9da3;
    --text-faint: #63666c;
    --white: #ffffff;
    --radius: 14px;
    --radius-sm: 9px;
    --shadow: 0 12px 32px -8px rgba(0,0,0,.55), 0 2px 8px rgba(0,0,0,.35);
    --shadow-sm: 0 2px 10px rgba(0,0,0,.3);
    --ease: cubic-bezier(.16,1,.3,1);
    --h-control: 44px;
    --h-control-sm: 34px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

html { scrollbar-color: #3a3d43 transparent; }

body {
    margin: 0;
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    background-image:
        radial-gradient(circle at 12% -5%, rgba(255,255,255,.05), transparent 42%),
        radial-gradient(circle at 88% 8%, rgba(255,255,255,.03), transparent 38%),
        radial-gradient(circle at 50% 100%, rgba(255,255,255,.025), transparent 45%);
    background-attachment: fixed;
    color: var(--text);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    animation: pageFade .35s var(--ease);
}

@keyframes pageFade { from { opacity: 0; } to { opacity: 1; } }

/* Webkit scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #33353a; border-radius: 999px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #45484f; }

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--white); }

::selection { background: var(--white); color: #000; }

:focus-visible {
    outline: 2px solid rgba(255,255,255,.55);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ── Topbar ──────────────────────────────────────────────────────────── */
.topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(8,9,11,.72);
    backdrop-filter: blur(14px) saturate(1.3);
    -webkit-backdrop-filter: blur(14px) saturate(1.3);
    border-bottom: 1px solid var(--border-soft);
}
.topbar-inner {
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 13px 24px;
}
.brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.brand-mark {
    width: 32px; height: 32px;
    display: block;
    object-fit: cover;
    border-radius: 50%;
    background: #000;
    box-shadow: 0 0 0 1px rgba(255,255,255,.12), var(--shadow-sm);
    transition: box-shadow .2s var(--ease);
}
.brand:hover .brand-mark { box-shadow: 0 0 0 1px rgba(255,255,255,.28), var(--shadow-sm); }
.brand-name {
    font-weight: 700;
    font-size: 15.5px;
    letter-spacing: -.01em;
}

.topbar nav { display: flex; gap: 2px; background: rgba(255,255,255,.03); padding: 3px; border-radius: 999px; border: 1px solid var(--border-soft); }
.topbar nav a {
    color: var(--text-dim);
    font-weight: 600;
    font-size: 13.5px;
    padding: 7px 15px;
    border-radius: 999px;
    transition: background .18s var(--ease), color .18s var(--ease);
}
.topbar nav a:hover { color: var(--text); background: var(--panel-2); }
.topbar nav a.active { color: #000; background: var(--white); box-shadow: var(--shadow-sm); }

.topbar-user { display: flex; align-items: center; gap: 14px; margin-left: auto; }
.user-info { color: var(--text-faint); font-size: 12.5px; }

/* ── Layout ──────────────────────────────────────────────────────────── */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 30px 24px 64px;
}

.page-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 24px;
}
.page-header h1 { font-size: 23px; margin: 0 0 5px; letter-spacing: -.02em; }
.page-header .sub { color: var(--text-dim); font-size: 13.5px; }

.card {
    background: linear-gradient(180deg, rgba(255,255,255,.02), transparent 40%), var(--panel);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 22px;
    box-shadow: var(--shadow);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}
.stat-card {
    background: linear-gradient(155deg, var(--panel-2) 0%, var(--panel) 65%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 19px 21px;
    position: relative;
    overflow: hidden;
    transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.stat-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(120px 60px at 100% 0%, rgba(255,255,255,.06), transparent 70%);
    pointer-events: none;
}
.stat-card .label {
    color: var(--text-faint);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .09em;
    margin-bottom: 9px;
    font-weight: 700;
}
.stat-card .value { font-size: 27px; font-weight: 700; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }

.stat-card.highlight {
    background: linear-gradient(155deg, #1f2126 0%, var(--panel) 70%);
    border-color: rgba(255,255,255,.16);
    padding: 24px 26px;
}
.stat-card.highlight .value.big { font-size: 34px; }

/* ── Tile: interactive card (stat-cards, catálogos, accesos rápidos) ──── */
.stat-card, .tile {
    transition: border-color .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}
.stat-card:hover, .tile:hover {
    border-color: rgba(255,255,255,.4);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px -8px rgba(255,255,255,.15), var(--shadow);
}
.tile {
    display: block;
    background: linear-gradient(155deg, var(--panel-2) 0%, var(--panel) 65%);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 20px 22px;
    color: var(--text);
    position: relative;
    overflow: hidden;
}
.tile:hover { color: var(--text); text-decoration: none; }
.tile::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(120px 60px at 100% 0%, rgba(255,255,255,.06), transparent 70%);
    pointer-events: none;
}
.tile h2 { font-size: 16px; margin-bottom: 6px; }
.tile .desc { color: var(--text-dim); font-size: 13px; line-height: 1.5; }
.tile-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; margin-bottom: 24px; }

h1, h2, h3 { margin-top: 0; font-weight: 700; letter-spacing: -.015em; }
h2 { font-size: 18px; }

/* ── Table ───────────────────────────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; }
th, td {
    text-align: left;
    padding: 13px 14px;
    border-bottom: 1px solid var(--border-soft);
    font-size: 13.5px;
    font-variant-numeric: tabular-nums;
}
th {
    color: var(--text-faint);
    font-weight: 700;
    font-size: 10.5px;
    text-transform: uppercase;
    letter-spacing: .07em;
    padding-top: 4px;
    padding-bottom: 12px;
}
tbody tr { transition: background .15s var(--ease); }
tbody tr:hover { background: var(--panel-2); }
tbody tr:last-child td { border-bottom: none; }

/* ── Badges ──────────────────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 11px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: .02em;
    border: 1px solid var(--border);
    white-space: nowrap;
}
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }

.badge-stock { background: rgba(244,244,244,.08); color: var(--white); border-color: rgba(244,244,244,.25); }
.badge-reservado { background: rgba(244,244,244,.05); color: var(--text-dim); border-color: var(--border); }
.badge-vendido { background: transparent; color: var(--text-faint); border-color: var(--border-soft); }

.badge-proveedor { background: rgba(244,244,244,.08); color: var(--white); border-color: rgba(244,244,244,.25); }
.badge-particular { background: rgba(244,244,244,.04); color: var(--text-dim); border-color: var(--border); }
.badge-mayorista { background: var(--white); color: #000; border-color: var(--white); }
.badge-mayorista::before { background: #000; }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: var(--h-control);
    background: var(--white);
    color: #000;
    border: 1px solid var(--white);
    border-radius: var(--radius-sm);
    padding: 0 20px;
    font-weight: 600;
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 1px 2px rgba(0,0,0,.2);
    transition: opacity .15s var(--ease), transform .12s var(--ease), box-shadow .15s var(--ease);
}
.btn:hover { opacity: .88; text-decoration: none; color: #000; transform: translateY(-1px); box-shadow: 0 4px 14px -4px rgba(255,255,255,.25); }
.btn:active { transform: scale(.97) translateY(0); }
.btn:disabled { opacity: .4; cursor: not-allowed; transform: none; box-shadow: none; }
.btn-sm { height: var(--h-control-sm); padding: 0 14px; font-size: 12.5px; border-radius: 7px; }

.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); box-shadow: none; }
.btn-outline:hover { background: var(--panel-2); opacity: 1; border-color: var(--text-faint); color: var(--text); box-shadow: none; }

.btn-ghost { background: transparent; color: var(--text-dim); border: 1px solid transparent; box-shadow: none; }
.btn-ghost:hover { color: var(--text); background: var(--panel-2); opacity: 1; box-shadow: none; }

.btn-danger { background: transparent; color: #d4d4d4; border: 1px solid var(--border); box-shadow: none; }
.btn-danger:hover { background: var(--white); color: #000; border-color: var(--white); opacity: 1; box-shadow: 0 4px 14px -4px rgba(255,255,255,.25); }

.actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ── Forms ───────────────────────────────────────────────────────────── */
form .field { margin-bottom: 16px; }
label { display: block; margin-bottom: 7px; font-weight: 600; font-size: 12px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .045em; }
input, select, textarea {
    width: 100%;
    height: var(--h-control);
    padding: 0 14px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    line-height: normal;
    transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
input::placeholder, textarea::placeholder { color: var(--text-faint); }
input:focus, select:focus, textarea:focus { outline: none; border-color: rgba(255,255,255,.35); box-shadow: 0 0 0 3px rgba(255,255,255,.06); }
input:hover, select:hover, textarea:hover { border-color: #3a3d43; }
textarea { height: auto; min-height: 88px; padding: 12px 14px; resize: vertical; }
select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%238f8f8f'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 14px center; padding-right: 34px; cursor: pointer; }

/* El desplegable nativo no hereda los colores del select en todos los
   navegadores: sin esto, las opciones salen casi invisibles sobre el fondo
   oscuro (texto gris sobre gris). */
select option,
select optgroup {
    background-color: #1b1d21;
    color: #f5f6f7;
}
select option:disabled { color: #63666c; }

input[type=file] {
    height: auto;
    padding: 8px 14px;
    cursor: pointer;
}
input[type=file]::file-selector-button {
    background: var(--panel-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 7px;
    padding: 6px 12px;
    margin-right: 12px;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s var(--ease);
}
input[type=file]::file-selector-button:hover { background: var(--border); }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ── Tablet / notebook chica (ej. 13") ───────────────────────────────── */
@media (max-width: 1000px) {
    .container { max-width: 100%; padding: 24px 18px 50px; }
    .grid-3, .grid-4 { grid-template-columns: 1fr 1fr; }
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
}

/* ── Celular ─────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .container { padding: 16px 16px 40px; }

    .topbar-inner { gap: 10px; flex-wrap: nowrap; padding: 10px 14px; }
    .user-info { display: none; }
    .topbar nav {
        overflow-x: auto;
        max-width: 46vw;
        min-width: 0;
        flex-shrink: 1;
        -ms-overflow-style: none;
        scrollbar-width: none;
    }
    .topbar nav::-webkit-scrollbar { display: none; }
    .topbar nav a { white-space: nowrap; }

    table, thead, tbody, tr { display: block; width: 100%; }
    thead { display: none; }
    tr { margin-bottom: 12px; border: 1px solid var(--border-soft); border-radius: var(--radius-sm); padding: 4px; background: var(--panel-2); }
    td { display: block; width: 100%; border: none; padding: 8px 12px; }
    td::before { content: attr(data-label); display: block; font-size: 10.5px; color: var(--text-faint); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 2px; }

    .check-row { flex-wrap: wrap; }
    .check-row label { min-width: 100%; order: -1; }
    .check-row .price-input, .check-row input[type=number] { max-width: none; flex: 1; }

    .modal-box { padding: 20px; }
    .modal-overlay { padding: 16px 8px; }

    .page-header { align-items: flex-start; }
    .filters .field { min-width: 140px; flex: 1 1 140px; }
}

.alert {
    padding: 13px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
    font-size: 13.5px;
    border: 1px solid var(--border);
    animation: pageFade .25s var(--ease);
}
.alert-error { background: rgba(244,244,244,.05); color: var(--white); border-color: var(--text-faint); }
.alert-success { background: rgba(244,244,244,.05); color: var(--white); border-color: var(--text-faint); }

.filters { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; align-items: end; }
.filters .field { margin-bottom: 0; min-width: 170px; }

/* ── Login ───────────────────────────────────────────────────────────── */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 50% 15%, rgba(255,255,255,.06), transparent 55%),
        linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
        var(--bg);
    background-size: auto, 42px 42px, 42px 42px, auto;
}
.login-box {
    width: 100%;
    max-width: 380px;
    background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 40%), var(--panel);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 42px 36px;
    box-shadow: var(--shadow);
    animation: modalIn .4s var(--ease);
}
.login-brand { display: flex; flex-direction: column; align-items: center; gap: 16px; margin-bottom: 30px; }
.login-brand .login-logo { width: 84px; height: 84px; border-radius: 50%; box-shadow: 0 0 0 1px rgba(255,255,255,.15), 0 0 40px -6px rgba(255,255,255,.15); }
.login-brand h1 { font-size: 19px; margin: 0; letter-spacing: -.01em; }
.login-brand .tag { color: var(--text-faint); font-size: 11.5px; text-transform: uppercase; letter-spacing: .12em; }

.text-dim { color: var(--text-dim); }
.text-faint { color: var(--text-faint); }
.mb-0 { margin-bottom: 0; }
.flex-between { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

.empty-state { text-align: center; padding: 54px 20px; color: var(--text-faint); }
.empty-state .big { font-size: 15px; color: var(--text-dim); margin-bottom: 6px; }

.divider { height: 1px; background: var(--border-soft); margin: 22px 0; border: none; }

/* ── Item rows (compra/venta forms) ─────────────────────────────────── */
.item-row {
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 12px;
    background: var(--bg-elev);
    position: relative;
    transition: border-color .15s var(--ease);
}
.item-row:hover { border-color: #333; }
.item-row .item-row-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.item-row .item-row-head .tag { color: var(--text-faint); font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; font-weight: 700; }
.remove-row-btn {
    background: none; border: 1px solid var(--border); color: var(--text-dim);
    border-radius: 7px; padding: 4px 10px; font-size: 12px; cursor: pointer;
    transition: color .15s var(--ease), border-color .15s var(--ease);
}
.remove-row-btn:hover { color: var(--text); border-color: var(--text-faint); }

.pill-select { display: flex; gap: 8px; }
.pill-select label {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: none;
    letter-spacing: 0;
    margin: 0;
    transition: all .15s var(--ease);
}
.pill-select label:hover { border-color: var(--text-faint); color: var(--text); }
.pill-select input { display: none; }
.pill-select input:checked + label,
.pill-select label.checked { background: var(--white); color: #000; border-color: var(--white); box-shadow: var(--shadow-sm); }

.check-row { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--border-soft); transition: background .15s var(--ease); }
.check-row:hover { background: rgba(255,255,255,.02); }
.check-row input[type=checkbox] { width: auto; margin: 0; accent-color: var(--white); }
.check-row .price-input { max-width: 140px; }

.total-line { display: flex; justify-content: space-between; padding: 10px 0; font-size: 14px; font-variant-numeric: tabular-nums; }
.total-line.grand { font-weight: 700; font-size: 16px; border-top: 1px solid var(--border); margin-top: 6px; padding-top: 14px; }

/* ── Modal ───────────────────────────────────────────────────────────── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.68);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 100;
    align-items: flex-start;
    justify-content: center;
    padding: 40px 16px;
    overflow-y: auto;
}
.modal-overlay.open { display: flex; animation: overlayFade .18s var(--ease); }
.modal-box {
    background: linear-gradient(180deg, rgba(255,255,255,.03), transparent 40%), var(--panel);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius);
    padding: 28px;
    width: 100%;
    max-width: 760px;
    box-shadow: var(--shadow);
    position: relative;
}
.modal-overlay.open .modal-box { animation: modalIn .28s var(--ease); }
@keyframes overlayFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalIn { from { opacity: 0; transform: translateY(10px) scale(.97); } to { opacity: 1; transform: none; } }

.modal-close {
    position: absolute;
    top: 18px;
    right: 18px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    transition: color .15s var(--ease), border-color .15s var(--ease), background .15s var(--ease);
}
.modal-close:hover { color: var(--text); border-color: var(--text-faint); background: var(--panel-2); }
.modal-box h2 { margin-bottom: 4px; padding-right: 30px; }
body.modal-open { overflow: hidden; }

.bar-chart { width: 100%; height: auto; display: block; }
.bar-chart rect { transition: fill .15s var(--ease); }
.bar-chart rect:hover { fill: #fff !important; }

/* ── Selector de negocio (solo admin) ────────────────────────────────── */
.neg-switch { margin: 0; }
.neg-switch select {
    height: var(--h-control-sm);
    font-size: 12.5px;
    padding: 0 30px 0 11px;
    /* Fondo sólido, no transparente: el desplegable nativo de Windows usa el
       background-color del select para el popup, y con transparent las
       opciones quedaban ilegibles. */
    background-color: var(--panel-2);
    border-radius: 999px;
    background-position: right 11px center;
    width: auto;
    min-width: 150px;
}

/* ── Tarjetas de período del dashboard (hoy / semana / mes) ──────────── */
.periodo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
    margin-bottom: 24px;
}
.periodo-card { margin-bottom: 0; padding: 20px 22px; }
.periodo-titulo { font-size: 15px; font-weight: 700; letter-spacing: -.01em; }
.periodo-rango {
    color: var(--text-faint);
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 14px;
}
.periodo-fila {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 7px 0;
    border-bottom: 1px solid var(--border-soft);
    font-variant-numeric: tabular-nums;
}
.periodo-fila:last-child { border-bottom: none; }
.periodo-fila strong { font-size: 16px; }

/* La venta recién cargada queda marcada al volver al listado. */
.fila-nueva { animation: filaNueva 2.4s var(--ease); }
.fila-nueva td { border-bottom-color: rgba(255,255,255,.3); }
@keyframes filaNueva {
    0%, 40% { background: rgba(255,255,255,.13); }
    100% { background: transparent; }
}

.credit {
    position: fixed;
    right: 12px;
    bottom: 8px;
    font-size: 10.5px;
    color: var(--text-faint);
    letter-spacing: .03em;
    z-index: 5;
    pointer-events: none;
    user-select: none;
}