/* =========================================================
   NEXENG CORE UI v1
   Archivo: /assets/css/nexeng-core-v1.css
   Uso: variables, componentes base y sistema visual común.
   No depende de base de datos ni modifica lógica de apps.
   ========================================================= */

:root {
    color-scheme: light;

    --nx-blue: #008fd3;
    --nx-blue-strong: #0867d8;
    --nx-cyan: #00aeef;
    --nx-navy: #0f2238;
    --nx-text: #0f2238;
    --nx-muted: #5b6b82;
    --nx-soft: #3f5871;
    --nx-bg: #f5fbff;
    --nx-bg-2: #eef8ff;
    --nx-card: rgba(255,255,255,.94);
    --nx-card-solid: #ffffff;
    --nx-border: #d6eafa;
    --nx-border-strong: rgba(8,103,216,.32);

    --nx-success: #20c997;
    --nx-success-strong: #059669;
    --nx-warning: #ff9f43;
    --nx-danger: #dc2626;
    --nx-orange: #f97316;

    --nx-shadow: 0 24px 70px rgba(15,34,56,.10);
    --nx-shadow-soft: 0 14px 36px rgba(15,34,56,.075);
    --nx-shadow-mini: 0 10px 24px rgba(15,34,56,.07);

    --nx-radius-xl: 30px;
    --nx-radius-lg: 22px;
    --nx-radius-md: 16px;
    --nx-radius-sm: 12px;
    --nx-max: 1520px;
    --nx-max-wide: 1840px;

    --nx-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --nx-ease: cubic-bezier(.2,.8,.2,1);
}

/* Reset seguro */
* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; }
body {
    min-height: 100%;
    margin: 0;
    color: var(--nx-text);
    font-family: var(--nx-font);
    line-height: 1.5;
    overflow-x: hidden;
    background:
        radial-gradient(circle at 12% 8%, rgba(0,174,239,.15), transparent 34%),
        radial-gradient(circle at 92% 18%, rgba(8,103,216,.10), transparent 30%),
        linear-gradient(180deg, #fff 0%, #f8fcff 48%, #eef8ff 100%);
}
body.nx-core-body::before,
.nx-grid-bg::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -3;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(0,143,211,.052) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,143,211,.052) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,.76), rgba(0,0,0,.30) 58%, transparent 100%);
}
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img, svg { max-width: 100%; }
[hidden] { display: none !important; }

.nx-shell {
    width: min(100% - 56px, var(--nx-max));
    margin-inline: auto;
}
.nx-shell-wide {
    width: min(100% - 56px, var(--nx-max-wide));
    margin-inline: auto;
}

/* Header público reutilizable */
.nx-public-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,.96);
    border-bottom: 1px solid rgba(214,234,250,.95);
    box-shadow: 0 8px 28px rgba(15,34,56,.06);
    backdrop-filter: blur(18px);
}
.nx-public-header::after {
    content: "";
    position: absolute;
    left: 2.5%;
    right: 2.5%;
    bottom: -1px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,143,211,.22), transparent);
    pointer-events: none;
}
.nx-public-header-inner {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.nx-brand {
    position: relative;
    display: block;
    width: 300px;
    min-width: 260px;
    height: 58px;
}
.nx-brand::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 292px;
    height: 52px;
    transform: translateY(-50%);
    background: url('/assets/brand/nexeng-logo-header-v22.png?v=22.2.0') left center/contain no-repeat;
}
.nx-brand-text {
    position: absolute;
    opacity: 0;
    visibility: hidden;
}
.nx-public-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 14px;
    white-space: nowrap;
}
.nx-nav-link,
.nx-icon-btn,
.nx-login-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    border: 1px solid transparent;
    border-radius: 14px;
    background: transparent;
    color: var(--nx-navy);
    font-size: .94rem;
    font-weight: 820;
    letter-spacing: -.02em;
    transition: transform .18s var(--nx-ease), background .18s var(--nx-ease), border-color .18s var(--nx-ease), box-shadow .18s var(--nx-ease), color .18s var(--nx-ease);
}
.nx-nav-link { padding: 0 12px; }
.nx-nav-link:hover,
.nx-icon-btn:hover {
    transform: translateY(-1px);
    background: rgba(0,143,211,.065);
    border-color: rgba(0,143,211,.13);
}
.nx-login-btn,
.nx-btn-primary {
    border: 0;
    color: #fff;
    background: linear-gradient(135deg, var(--nx-blue-strong), var(--nx-cyan));
    box-shadow: 0 14px 32px rgba(8,103,216,.23);
}
.nx-login-btn { padding: 0 18px; }
.nx-login-btn:hover,
.nx-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 42px rgba(8,103,216,.30);
}
.nx-icon-btn {
    width: 44px;
    height: 44px;
    padding: 0;
}
.nx-nav-sep {
    width: 1px;
    height: 26px;
    background: rgba(15,34,56,.13);
}

/* Cards y layout */
.nx-card {
    position: relative;
    border: 1px solid var(--nx-border);
    border-radius: var(--nx-radius-xl);
    background: var(--nx-card);
    box-shadow: var(--nx-shadow-soft);
    backdrop-filter: blur(16px);
}
.nx-card-pad { padding: 24px; }
.nx-card-hover {
    transition: transform .20s var(--nx-ease), box-shadow .20s var(--nx-ease), border-color .20s var(--nx-ease);
}
.nx-card-hover:hover {
    transform: translateY(-4px);
    border-color: rgba(8,103,216,.24);
    box-shadow: var(--nx-shadow);
}
.nx-grid {
    display: grid;
    gap: 18px;
}
.nx-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.nx-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.nx-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.nx-section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 22px;
}
.nx-section-label {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 10px;
    border: 1px solid rgba(0,143,211,.18);
    border-radius: 999px;
    background: rgba(240,248,255,.88);
    color: var(--nx-blue-strong);
    font-size: .72rem;
    font-weight: 950;
    letter-spacing: .08em;
    text-transform: uppercase;
}
.nx-section-head h1,
.nx-section-head h2 {
    margin: 8px 0 0;
    color: var(--nx-navy);
    letter-spacing: -.05em;
    line-height: 1.05;
}
.nx-section-head h1 { font-size: clamp(2.2rem, 5vw, 5.1rem); }
.nx-section-head h2 { font-size: clamp(1.8rem, 3vw, 2.55rem); }
.nx-section-desc {
    max-width: 760px;
    margin: 10px 0 0;
    color: var(--nx-muted);
    font-size: .98rem;
}

/* Botones */
.nx-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border: 1px solid var(--nx-border);
    border-radius: 999px;
    padding: 0 18px;
    background: #fff;
    color: var(--nx-navy);
    font-weight: 900;
    letter-spacing: -.02em;
    transition: transform .18s var(--nx-ease), box-shadow .18s var(--nx-ease), border-color .18s var(--nx-ease), background .18s var(--nx-ease), color .18s var(--nx-ease);
}
.nx-btn:hover {
    transform: translateY(-1px);
    border-color: rgba(8,103,216,.22);
    box-shadow: var(--nx-shadow-mini);
}
.nx-btn-primary {
    border-color: transparent;
}
.nx-btn-ghost {
    background: rgba(255,255,255,.76);
}
.nx-btn-danger {
    border-color: rgba(220,38,38,.18);
    color: #b91c1c;
    background: #fff7f7;
}
.nx-btn-sm {
    min-height: 34px;
    padding: 0 12px;
    font-size: .82rem;
    border-radius: 12px;
}
.nx-btn-block { width: 100%; }

/* Badges y chips */
.nx-chip,
.nx-badge {
    min-height: 28px;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0 10px;
    border: 1px solid var(--nx-border);
    border-radius: 999px;
    background: rgba(240,248,255,.88);
    color: var(--nx-soft);
    font-size: .74rem;
    font-weight: 900;
}
.nx-badge-success { color: #067a57; background: rgba(32,201,151,.13); border-color: rgba(32,201,151,.28); }
.nx-badge-warning { color: #9a5a00; background: rgba(255,159,67,.13); border-color: rgba(255,159,67,.28); }
.nx-badge-danger { color: #b91c1c; background: rgba(220,38,38,.09); border-color: rgba(220,38,38,.22); }
.nx-badge-pro { color: #0b62b6; background: #eff8ff; border-color: rgba(8,103,216,.20); }

/* Formularios */
.nx-field {
    display: grid;
    gap: 7px;
}
.nx-label {
    color: var(--nx-soft);
    font-size: .78rem;
    font-weight: 900;
}
.nx-input,
.nx-select,
.nx-textarea {
    width: 100%;
    min-height: 44px;
    border: 1px solid var(--nx-border);
    border-radius: 14px;
    padding: 0 12px;
    background: rgba(255,255,255,.92);
    color: var(--nx-text);
    outline: none;
    transition: border-color .18s var(--nx-ease), box-shadow .18s var(--nx-ease), background .18s var(--nx-ease);
}
.nx-textarea {
    min-height: 112px;
    padding: 12px;
    resize: vertical;
}
.nx-input:focus,
.nx-select:focus,
.nx-textarea:focus {
    border-color: rgba(8,103,216,.40);
    box-shadow: 0 0 0 4px rgba(8,103,216,.10);
}
.nx-help {
    color: var(--nx-muted);
    font-size: .78rem;
}

/* Tablas base */
.nx-table-wrap {
    overflow: auto;
    border: 1px solid var(--nx-border);
    border-radius: 18px;
    background: #fff;
    box-shadow: var(--nx-shadow-soft);
}
.nx-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    min-width: 760px;
}
.nx-table th,
.nx-table td {
    padding: 12px 14px;
    border-bottom: 1px solid rgba(214,234,250,.88);
    text-align: left;
    font-size: .88rem;
}
.nx-table th {
    position: sticky;
    top: 0;
    z-index: 2;
    color: var(--nx-soft);
    background: #f4faff;
    font-size: .76rem;
    text-transform: uppercase;
    letter-spacing: .055em;
}
.nx-table tr:last-child td { border-bottom: 0; }

/* Toast */
.nx-toast {
    position: fixed;
    left: 50%;
    bottom: 24px;
    z-index: 3000;
    transform: translate(-50%, 18px);
    min-width: min(420px, calc(100vw - 32px));
    padding: 14px 16px;
    border: 1px solid var(--nx-border);
    border-radius: 18px;
    color: var(--nx-navy);
    background: rgba(255,255,255,.96);
    box-shadow: var(--nx-shadow);
    opacity: 0;
    pointer-events: none;
    transition: opacity .18s var(--nx-ease), transform .18s var(--nx-ease);
}
.nx-toast.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

/* Modal */
.nx-modal {
    position: fixed;
    inset: 0;
    z-index: 2500;
    display: none;
    place-items: center;
    padding: 24px;
    background: rgba(15,34,56,.36);
    backdrop-filter: blur(10px);
}
.nx-modal.is-open { display: grid; }
.nx-modal-card {
    width: min(560px, 100%);
    border: 1px solid var(--nx-border);
    border-radius: var(--nx-radius-xl);
    background: rgba(255,255,255,.98);
    box-shadow: var(--nx-shadow);
    padding: 24px;
}
.nx-modal-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
}
.nx-modal-head h2 { margin: 0; letter-spacing: -.04em; }
.nx-modal-close {
    width: 38px;
    height: 38px;
    border: 1px solid var(--nx-border);
    border-radius: 14px;
    background: #fff;
}

/* Dark mode global */
body.nx-theme-dark {
    color-scheme: dark;
    --nx-text: #eaf6ff;
    --nx-navy: #f3fbff;
    --nx-muted: #a9bdd2;
    --nx-soft: #c5d6e6;
    --nx-bg: #071522;
    --nx-bg-2: #0d2438;
    --nx-card: rgba(11,31,51,.96);
    --nx-card-solid: #0b1f33;
    --nx-border: rgba(125,211,252,.18);
    --nx-border-strong: rgba(94,203,255,.38);
    --nx-shadow: 0 24px 70px rgba(0,0,0,.34);
    --nx-shadow-soft: 0 16px 42px rgba(0,0,0,.26);
    background:
        radial-gradient(circle at 10% 8%, rgba(0,174,239,.13), transparent 28%),
        radial-gradient(circle at 88% 18%, rgba(8,103,216,.16), transparent 30%),
        linear-gradient(180deg, #071522 0%, #081a2c 46%, #0d2438 100%);
}
body.nx-theme-dark.nx-core-body::before {
    opacity: .28;
}
body.nx-theme-dark .nx-public-header {
    background: rgba(7,18,31,.96);
    border-bottom-color: rgba(125,211,252,.18);
    box-shadow: 0 18px 50px rgba(0,0,0,.32);
}
body.nx-theme-dark .nx-public-header::after {
    background: linear-gradient(90deg, transparent, rgba(94,203,255,.28), transparent);
}
body.nx-theme-dark .nx-nav-link,
body.nx-theme-dark .nx-icon-btn {
    color: #ecf8ff;
}
body.nx-theme-dark .nx-nav-link:hover,
body.nx-theme-dark .nx-icon-btn:hover {
    background: rgba(94,203,255,.08);
    border-color: rgba(94,203,255,.18);
}
body.nx-theme-dark .nx-nav-sep { background: rgba(125,211,252,.22); }
body.nx-theme-dark .nx-card,
body.nx-theme-dark .nx-modal-card,
body.nx-theme-dark .nx-toast {
    background: var(--nx-card);
    border-color: var(--nx-border);
    box-shadow: var(--nx-shadow-soft);
}
body.nx-theme-dark .nx-section-label,
body.nx-theme-dark .nx-chip,
body.nx-theme-dark .nx-badge {
    background: rgba(20,55,86,.92);
    border-color: rgba(125,211,252,.22);
    color: #d9f4ff;
}
body.nx-theme-dark .nx-input,
body.nx-theme-dark .nx-select,
body.nx-theme-dark .nx-textarea,
body.nx-theme-dark .nx-btn,
body.nx-theme-dark .nx-modal-close,
body.nx-theme-dark .nx-table-wrap {
    background: rgba(13,34,55,.96);
    border-color: rgba(125,211,252,.20);
    color: #f3fbff;
}
body.nx-theme-dark .nx-btn-ghost { background: rgba(13,34,55,.68); }
body.nx-theme-dark .nx-table th {
    background: #102a43;
    color: #c5d6e6;
}
body.nx-theme-dark .nx-table td,
body.nx-theme-dark .nx-table th {
    border-bottom-color: rgba(125,211,252,.14);
}

/* Responsive */
@media (max-width: 920px) {
    .nx-shell,
    .nx-shell-wide {
        width: min(100% - 28px, var(--nx-max));
    }
    .nx-public-header-inner {
        min-height: 72px;
        flex-wrap: wrap;
        gap: 8px;
        padding-block: 8px;
    }
    .nx-brand {
        width: 220px;
        min-width: 210px;
        height: 48px;
    }
    .nx-brand::before {
        width: 220px;
        height: 44px;
    }
    .nx-public-nav {
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        overflow-y: hidden;
        padding-bottom: 4px;
        scrollbar-width: none;
    }
    .nx-public-nav::-webkit-scrollbar { display: none; }
    .nx-grid-4,
    .nx-grid-3,
    .nx-grid-2 {
        grid-template-columns: 1fr;
    }
    .nx-section-head {
        flex-direction: column;
    }
}
@media (max-width: 640px) {
    .nx-shell,
    .nx-shell-wide {
        width: min(100% - 22px, var(--nx-max));
    }
    .nx-card-pad,
    .nx-modal-card {
        padding: 18px;
    }
    .nx-btn {
        min-height: 44px;
    }
    .nx-section-head h1 {
        font-size: clamp(2.3rem, 13vw, 3.8rem);
    }
    .nx-section-head h2 {
        font-size: 1.55rem;
    }
}

/* Accesibilidad */
:focus-visible {
    outline: 3px solid rgba(8,103,216,.24);
    outline-offset: 3px;
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}