/* =====================================================================
   SISTEMA DE DISEÑO — Inventario & Ventas
   Inspirado en Stripe / Linear / Vercel / Notion
   ===================================================================== */

:root {
    --c-primary: #6366f1;
    --c-primary-600: #4f46e5;
    --c-primary-700: #4338ca;
    --c-accent: #0ea5e9;
    --c-success: #10b981;
    --c-warning: #f59e0b;
    --c-danger: #ef4444;
    --c-info: #3b82f6;

    --grad-primary: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);
    --grad-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);
    --grad-warning: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
    --grad-danger:  linear-gradient(135deg, #ef4444 0%, #f87171 100%);

    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
    --shadow: 0 6px 24px rgba(15,23,42,.08);
    --shadow-lg: 0 20px 50px rgba(15,23,42,.16);
    --transition: .25s cubic-bezier(.4,0,.2,1);

    --sidebar-w: 264px;
    --sidebar-w-collapsed: 76px;
    --topbar-h: 66px;
}

/* ---------- Tema claro ---------- */
[data-theme="light"] {
    --bg: #f4f6fb;
    --bg-soft: #eef1f8;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --glass-bg: rgba(255,255,255,.7);
    --glass-border: rgba(255,255,255,.6);
    --text: #0f172a;
    --text-soft: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --sidebar-bg: #ffffff;
    --hover: #f1f5f9;
}

/* ---------- Tema oscuro ---------- */
[data-theme="dark"] {
    --bg: #0b1020;
    --bg-soft: #0f152b;
    --surface: #151b30;
    --surface-2: #1b2238;
    --glass-bg: rgba(21,27,48,.6);
    --glass-border: rgba(255,255,255,.08);
    --text: #e8edf7;
    --text-soft: #9aa6bf;
    --text-muted: #6b7689;
    --border: #243049;
    --sidebar-bg: #0e1426;
    --hover: #1c2540;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--c-primary); text-decoration: none; }
.text-muted-soft { color: var(--text-soft) !important; }

/* ---------- Glassmorphism ---------- */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(18px) saturate(160%);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* ---------- Botones ---------- */
.btn-gradient {
    background: var(--grad-primary);
    color: #fff !important;
    border: none;
    border-radius: var(--radius);
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(99,102,241,.35);
    transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
    position: relative;
}
.btn-gradient:hover { transform: translateY(-2px); filter: brightness(1.05); box-shadow: 0 12px 28px rgba(99,102,241,.45); }
.btn-gradient:active { transform: translateY(0); }

.btn-soft {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.btn-soft:hover { background: var(--hover); color: var(--text); }

/* ---------- Inputs ---------- */
.form-control, .form-select {
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.form-control:focus, .form-select:focus {
    background: var(--surface-2);
    color: var(--text);
    border-color: var(--c-primary);
    box-shadow: 0 0 0 .2rem rgba(99,102,241,.18);
}
.form-control::placeholder { color: var(--text-muted); }
.form-floating > label { color: var(--text-muted); }

/* ---------- Cards ---------- */
.card-premium {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
}
.card-premium:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

/* ---------- Layout app ---------- */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-w);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    position: fixed; inset: 0 auto 0 0;
    display: flex; flex-direction: column;
    transition: width var(--transition), transform var(--transition);
    z-index: 1040;
}
.sidebar .brand {
    height: var(--topbar-h);
    display: flex; align-items: center; gap: 12px;
    padding: 0 20px; font-weight: 800; font-size: 1.1rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap; overflow: hidden;
}
.sidebar .brand .logo {
    width: 38px; height: 38px; flex: 0 0 38px;
    display: grid; place-items: center;
    background: var(--grad-primary); color: #fff;
    border-radius: 11px; font-size: 1.1rem;
}
.sidebar .nav-section { padding: 14px 12px; overflow-y: auto; flex: 1; }
.sidebar .nav-label {
    font-size: .68rem; text-transform: uppercase; letter-spacing: .08em;
    color: var(--text-muted); padding: 14px 14px 6px; font-weight: 700;
}
.sidebar .nav-link {
    display: flex; align-items: center; gap: 13px;
    padding: 11px 14px; margin: 2px 0; border-radius: var(--radius-sm);
    color: var(--text-soft); font-weight: 500; white-space: nowrap;
    transition: var(--transition);
}
.sidebar .nav-link i { width: 20px; text-align: center; font-size: 1rem; }
.sidebar .nav-link:hover { background: var(--hover); color: var(--text); }
.sidebar .nav-link.active { background: var(--grad-primary); color: #fff; box-shadow: 0 6px 16px rgba(99,102,241,.35); }

/* Sidebar colapsado */
.app-shell.collapsed .sidebar { width: var(--sidebar-w-collapsed); }
.app-shell.collapsed .sidebar .brand span,
.app-shell.collapsed .sidebar .nav-link span,
.app-shell.collapsed .sidebar .nav-label { opacity: 0; pointer-events: none; width: 0; overflow: hidden; }
.app-shell.collapsed .main { margin-left: var(--sidebar-w-collapsed); }

.main {
    flex: 1; margin-left: var(--sidebar-w);
    transition: margin var(--transition);
    min-width: 0;
}

/* ---------- Topbar ---------- */
.topbar {
    height: var(--topbar-h);
    position: sticky; top: 0; z-index: 1030;
    display: flex; align-items: center; gap: 16px;
    padding: 0 22px;
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}
.topbar .icon-btn {
    width: 42px; height: 42px; border-radius: 12px;
    display: grid; place-items: center;
    background: var(--surface-2); border: 1px solid var(--border);
    color: var(--text-soft); cursor: pointer; transition: var(--transition);
}
.topbar .icon-btn:hover { background: var(--hover); color: var(--text); }
.topbar .search {
    flex: 1; max-width: 420px; position: relative;
}
.topbar .search input {
    width: 100%; padding: 10px 14px 10px 40px;
    background: var(--surface-2); border: 1px solid var(--border);
    border-radius: 12px; color: var(--text);
}
.topbar .search i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); }

.content { padding: 26px; }

.page-head { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; margin-bottom: 22px; }
.page-head h2 { margin: 0; font-weight: 800; letter-spacing: -.02em; }
.breadcrumbx { font-size: .82rem; color: var(--text-muted); }
.breadcrumbx a { color: var(--text-soft); }

/* Avatar */
.avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; background: var(--grad-primary); display: grid; place-items: center; color: #fff; font-weight: 700; }

/* Badges de estado */
.badge-status { padding: .35em .7em; border-radius: 999px; font-weight: 600; font-size: .72rem; }
.badge-activo   { background: rgba(16,185,129,.15); color: #10b981; }
.badge-inactivo { background: rgba(148,163,184,.18); color: #94a3b8; }
.badge-agotado  { background: rgba(239,68,68,.15); color: #ef4444; }

/* Skeleton loading */
.skeleton { background: linear-gradient(90deg, var(--surface-2) 25%, var(--hover) 50%, var(--surface-2) 75%); background-size: 200% 100%; animation: shimmer 1.3s infinite; border-radius: var(--radius-sm); }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* Stat cards (dashboard) */
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); position: relative; overflow: hidden; transition: var(--transition); height: 100%; }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.stat-card .icon { width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; color: #fff; font-size: 1.3rem; margin-bottom: 14px; }
.stat-card .value { font-size: 1.7rem; font-weight: 800; letter-spacing: -.02em; }
.stat-card .label { color: var(--text-soft); font-size: .85rem; }
.info-tip { cursor: pointer; font-size: .9rem; opacity: .5; transition: opacity .2s; align-self: flex-start; margin-top: 4px; }
.info-tip:hover { opacity: 1; }

/* =================== CardView de productos =================== */
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.product-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column;
    transition: transform var(--transition), box-shadow var(--transition); position: relative;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--c-primary); }
.product-card .thumb {
    position: relative; aspect-ratio: 1/1; background: var(--surface-2);
    display: grid; place-items: center; overflow: hidden;
}
.product-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.product-card:hover .thumb img { transform: scale(1.07); }
.product-card .discount-tag {
    position: absolute; top: 10px; left: 10px; z-index: 2;
    background: var(--grad-danger); color: #fff; font-weight: 700; font-size: .72rem;
    padding: .3em .6em; border-radius: 8px; box-shadow: 0 4px 12px rgba(239,68,68,.4);
}
/* Badge de estado sobre la tarjeta: sólido y bien visible, como el tag de descuento */
.product-card .status-tag {
    position: absolute; top: 10px; right: 10px; z-index: 2;
    color: #fff; font-weight: 700; font-size: .72rem;
    padding: .3em .6em; border-radius: 8px; text-transform: capitalize;
    box-shadow: 0 4px 12px rgba(0,0,0,.3);
}
.product-card .status-tag.badge-activo   { background: #10b981; box-shadow: 0 4px 12px rgba(16,185,129,.5); }
.product-card .status-tag.badge-inactivo { background: #94a3b8; box-shadow: 0 4px 12px rgba(148,163,184,.5); }
.product-card .status-tag.badge-agotado  { background: #ef4444; box-shadow: 0 4px 12px rgba(239,68,68,.5); }
.product-card .fav-btn {
    position: absolute; bottom: 10px; right: 10px; z-index: 2;
    width: 36px; height: 36px; border-radius: 50%; border: none;
    background: var(--glass-bg); backdrop-filter: blur(8px); color: #ef4444; cursor: pointer;
    display: grid; place-items: center; opacity: 0; transform: translateY(6px); transition: var(--transition);
}
.product-card:hover .fav-btn { opacity: 1; transform: translateY(0); }
.product-card .body { padding: 14px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
.product-card .code { font-size: .7rem; color: var(--text-muted); font-weight: 600; letter-spacing: .03em; }
.product-card .name { font-weight: 700; font-size: .95rem; line-height: 1.3; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 2.5em; }
.product-card .price-row { display: flex; align-items: baseline; gap: 8px; margin-top: 2px; }
.product-card .price { font-size: 1.2rem; font-weight: 800; color: var(--c-primary); }
.product-card .price-old { font-size: .8rem; color: var(--text-muted); text-decoration: line-through; }
.product-card .meta { display: flex; align-items: center; justify-content: space-between; font-size: .76rem; color: var(--text-soft); margin-top: auto; padding-top: 8px; }
.product-card .stock-pill { padding: .25em .6em; border-radius: 999px; font-weight: 600; background: rgba(16,185,129,.14); color: #10b981; }
.product-card .stock-pill.low { background: rgba(239,68,68,.14); color: #ef4444; }
.product-card .actions {
    display: grid; grid-template-columns: repeat(6, 1fr); gap: 0;
    border-top: 1px solid var(--border);
}
.product-card .actions button {
    border: none; background: transparent; color: var(--text-soft); padding: 10px 0; cursor: pointer;
    transition: var(--transition); font-size: .85rem;
}
.product-card .actions button:hover { background: var(--hover); color: var(--c-primary); }
.product-card .actions button.del:hover { color: var(--c-danger); }

.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state i { font-size: 3rem; opacity: .4; margin-bottom: 14px; }

/* Galería en formulario */
.gallery-preview { display: flex; flex-wrap: wrap; gap: 10px; }
.gallery-preview .gimg { position: relative; width: 76px; height: 76px; border-radius: 10px; overflow: hidden; border: 1px solid var(--border); }
.gallery-preview .gimg img { width: 100%; height: 100%; object-fit: cover; }
.gallery-preview .gimg button { position: absolute; top: 2px; right: 2px; width: 20px; height: 20px; border-radius: 50%; border: none; background: rgba(239,68,68,.9); color: #fff; font-size: .65rem; cursor: pointer; }

/* Dropzone */
.dropzone { border: 2px dashed var(--border); border-radius: var(--radius); padding: 22px; text-align: center; cursor: pointer; transition: var(--transition); color: var(--text-muted); }
.dropzone:hover, .dropzone.dragover { border-color: var(--c-primary); background: var(--surface-2); color: var(--c-primary); }
.img-crop-preview { max-width: 100%; max-height: 260px; }

/* Share modal */
.share-btn { display: flex; align-items: center; gap: 10px; width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font-weight: 600; transition: var(--transition); }
.share-btn:hover { transform: translateX(4px); border-color: var(--c-primary); }
.share-btn i { width: 26px; font-size: 1.2rem; }
.share-wa i { color: #25D366; } .share-fb i { color: #1877F2; } .share-tg i { color: #229ED9; } .share-cp i { color: var(--c-primary); }

/* =================== Punto de venta (POS) =================== */
.pos-results {
    position: absolute; top: 100%; left: 0; right: 0; z-index: 30;
    background: var(--surface); border: 1px solid var(--border); border-radius: 12px;
    margin-top: 4px; box-shadow: var(--shadow-lg); max-height: 320px; overflow-y: auto; display: none;
}
.pos-results.show { display: block; }
.pos-results .pos-item { padding: 10px 14px; cursor: pointer; display: flex; justify-content: space-between; gap: 10px; transition: var(--transition); }
.pos-results .pos-item:hover, .pos-results .pos-item.active { background: var(--hover); }
.pos-results .pos-item .muted { color: var(--text-muted); font-size: .78rem; }
.pos-summary { position: sticky; top: 86px; }
#cartTable .qty-input { width: 72px; }
.cart-remove { border: none; background: transparent; color: var(--c-danger); cursor: pointer; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }
::-webkit-scrollbar-track { background: transparent; }

/* Responsive */
@media (max-width: 992px) {
    .sidebar { transform: translateX(-100%); }
    .app-shell.show-sidebar .sidebar { transform: translateX(0); }
    .main { margin-left: 0 !important; }
    .sidebar-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.5); z-index: 1035; }
}

/* Modales */
.modal-content { background: var(--surface); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.modal-header, .modal-footer { border-color: var(--border); }

/* =================== Tablas (sin recuadro blanco) =================== */
.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--text);
    --bs-table-striped-bg: transparent;
    --bs-table-striped-color: var(--text);
    --bs-table-hover-bg: var(--hover);
    --bs-table-hover-color: var(--text);
    color: var(--text);
    margin-bottom: 0;
}
.table > :not(caption) > * > * {
    background-color: transparent;
    color: var(--text);
    border-bottom-color: var(--border);
    box-shadow: none;
}
.table > thead > tr > th {
    color: var(--text-soft); font-weight: 700; font-size: .78rem;
    text-transform: uppercase; letter-spacing: .03em;
    border-bottom: 1px solid var(--border); background: transparent;
}
.table-hover > tbody > tr:hover > * { background-color: var(--hover); color: var(--text); }

/* DataTables: controles temáticos */
.dataTables_wrapper { color: var(--text-soft); padding: 4px; }
.dataTables_wrapper .dataTables_filter input,
.dataTables_wrapper .dataTables_length select {
    background: var(--surface-2); border: 1px solid var(--border); color: var(--text);
    border-radius: 9px; padding: 6px 12px; margin-left: 6px;
}
.dataTables_wrapper .dataTables_filter input:focus,
.dataTables_wrapper .dataTables_length select:focus { outline: none; border-color: var(--c-primary); }
.dataTables_wrapper .dataTables_info,
.dataTables_wrapper .dataTables_length label,
.dataTables_wrapper .dataTables_filter label { color: var(--text-soft); }
.dataTables_wrapper .dataTables_paginate { padding-top: 10px; }
.dataTables_wrapper .dataTables_paginate .paginate_button {
    color: var(--text-soft) !important; border: none !important; background: transparent !important;
    border-radius: 8px; margin: 0 2px; padding: 5px 12px;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.current,
.dataTables_wrapper .dataTables_paginate .paginate_button.current:hover {
    background: var(--grad-primary) !important; color: #fff !important; box-shadow: 0 4px 12px rgba(99,102,241,.35);
}
.dataTables_wrapper .dataTables_paginate .paginate_button:hover {
    background: var(--hover) !important; color: var(--text) !important;
}
.dataTables_wrapper .dataTables_paginate .paginate_button.disabled { opacity: .4; }

/* =================== Select2 (tema oscuro/claro) =================== */
.select2-container { width: 100% !important; }
.select2-container--default .select2-selection--single,
.select2-container--default .select2-selection--multiple {
    background: var(--surface-2); border: 1px solid var(--border) !important;
    border-radius: 10px; min-height: 42px; display: flex; align-items: center; padding: 2px 6px;
}
.select2-container--default .select2-selection--single .select2-selection__rendered { color: var(--text); line-height: 36px; padding-left: 4px; }
.select2-container--default .select2-selection--single .select2-selection__arrow { height: 40px; right: 6px; }
.select2-container--default .select2-selection--single .select2-selection__placeholder { color: var(--text-muted); }
.select2-container--default.select2-container--focus .select2-selection--single,
.select2-container--default.select2-container--open .select2-selection--single {
    border-color: var(--c-primary) !important; box-shadow: 0 0 0 3px rgba(99,102,241,.15);
}
.select2-dropdown { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow-lg); overflow: hidden; }
.select2-container--default .select2-results__option { color: var(--text); padding: 9px 12px; }
.select2-container--default .select2-results__option--highlighted[aria-selected],
.select2-container--default .select2-results__option--highlighted { background: var(--c-primary); color: #fff; }
.select2-container--default .select2-results__option[aria-selected=true] { background: var(--hover); color: var(--text); }
.select2-search--dropdown { padding: 8px; }
.select2-search--dropdown .select2-search__field { background: var(--surface-2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 6px 10px; }
.select2-container--default .select2-selection--multiple .select2-selection__choice { background: var(--c-primary); border: none; color: #fff; border-radius: 6px; }
.select2-results__option { background: transparent; }