/*
|--------------------------------------------------------------------------
| NODOVOX DESIGN SYSTEM
| Enterprise UI layer
|--------------------------------------------------------------------------
| Objetivo:
| - Mejorar la percepción visual de NODOVOX sin tocar lógica PHP.
| - Unificar tipografía, espaciado, cards, botones, tablas, badges y estados.
| - Aplicar progresivamente por pantalla usando clases nvx-*.
|
| Compatibilidad:
| - CSS puro.
| - No requiere framework.
| - Seguro para PHP legacy.
|--------------------------------------------------------------------------
*/

:root{
  --nvx-bg:#f4f7fb;
  --nvx-surface:#ffffff;
  --nvx-surface-soft:#f8fbff;
  --nvx-surface-strong:#eef4ff;

  --nvx-text:#071427;
  --nvx-text-soft:#344054;
  --nvx-text-muted:#667085;
  --nvx-text-faint:#98a2b3;

  --nvx-primary:#0b5cab;
  --nvx-primary-strong:#073f7a;
  --nvx-primary-soft:#e8f2ff;

  --nvx-info:#2563eb;
  --nvx-success:#12805c;
  --nvx-success-soft:#e8f7f1;
  --nvx-warning:#b7791f;
  --nvx-warning-soft:#fff6df;
  --nvx-danger:#b42318;
  --nvx-danger-soft:#fff1f0;

  --nvx-border:#dbe5f0;
  --nvx-border-soft:#e8eef6;

  --nvx-radius-xs:8px;
  --nvx-radius-sm:12px;
  --nvx-radius-md:16px;
  --nvx-radius-lg:22px;
  --nvx-radius-xl:28px;

  --nvx-shadow-sm:0 6px 18px rgba(13,35,70,.05);
  --nvx-shadow-md:0 14px 34px rgba(13,35,70,.075);
  --nvx-shadow-lg:0 24px 70px rgba(13,35,70,.10);

  --nvx-container:1180px;
  --nvx-container-wide:1440px;

  --nvx-space-1:4px;
  --nvx-space-2:8px;
  --nvx-space-3:12px;
  --nvx-space-4:16px;
  --nvx-space-5:20px;
  --nvx-space-6:24px;
  --nvx-space-8:32px;
  --nvx-space-10:40px;
  --nvx-space-12:48px;
  --nvx-space-16:64px;
}

/* Base opt-in */
.nvx-page{
  background:var(--nvx-bg);
  color:var(--nvx-text);
  font-family:Inter, "Plus Jakarta Sans", "IBM Plex Sans", Arial, Helvetica, sans-serif;
  min-height:100vh;
}

.nvx-container{
  width:calc(100% - 44px);
  max-width:var(--nvx-container);
  margin-left:auto;
  margin-right:auto;
}

.nvx-container-wide{
  width:calc(100% - 44px);
  max-width:var(--nvx-container-wide);
  margin-left:auto;
  margin-right:auto;
}

/* Header / hero */
.nvx-topbar{
  background:#061528;
  color:#fff;
  border-bottom:1px solid rgba(255,255,255,.08);
  padding:16px 0;
}

.nvx-topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
}

.nvx-brand{
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:900;
  letter-spacing:-.02em;
}

.nvx-nav{
  display:flex;
  align-items:center;
  gap:8px;
  flex-wrap:wrap;
}

.nvx-nav a,
.nvx-nav-link{
  color:#d9e8ff;
  text-decoration:none;
  font-weight:800;
  font-size:14px;
  padding:10px 13px;
  border-radius:999px;
  transition:background .18s ease, color .18s ease, transform .18s ease;
}

.nvx-nav a:hover,
.nvx-nav-link:hover{
  color:#fff;
  background:rgba(255,255,255,.10);
  transform:translateY(-1px);
}

.nvx-hero{
  background:
    radial-gradient(circle at 18% 12%, rgba(75,132,255,.28), transparent 34%),
    linear-gradient(135deg,#061528,#123a63);
  color:#fff;
  padding:56px 0;
}

.nvx-hero-center{text-align:center;}

.nvx-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 12px;
  border-radius:999px;
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.16);
  color:#d9e8ff;
  font-size:12px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.08em;
}

.nvx-h1{
  margin:14px 0 0;
  font-size:clamp(34px,5vw,64px);
  line-height:1.02;
  letter-spacing:-.055em;
  font-weight:950;
}

.nvx-lead{
  margin:16px auto 0;
  max-width:860px;
  color:#d7e6fa;
  font-size:17px;
  line-height:1.65;
}

/* Cards */
.nvx-card{
  background:var(--nvx-surface);
  border:1px solid var(--nvx-border-soft);
  border-radius:var(--nvx-radius-lg);
  box-shadow:var(--nvx-shadow-sm);
  padding:var(--nvx-space-6);
}

.nvx-card-premium{
  border-color:var(--nvx-border);
  box-shadow:var(--nvx-shadow-md);
}

.nvx-card-strong{
  border-radius:var(--nvx-radius-xl);
  box-shadow:var(--nvx-shadow-lg);
  padding:var(--nvx-space-8);
}

.nvx-card + .nvx-card{margin-top:var(--nvx-space-5);}

.nvx-section{padding:var(--nvx-space-8) 0;}

.nvx-section-title{
  margin:0 0 8px;
  font-size:26px;
  line-height:1.18;
  letter-spacing:-.035em;
  font-weight:950;
  color:var(--nvx-text);
}

.nvx-section-subtitle{
  margin:0;
  color:var(--nvx-text-muted);
  font-size:15px;
  line-height:1.55;
}

/* Grid */
.nvx-grid{display:grid;gap:var(--nvx-space-5);}
.nvx-grid-2{grid-template-columns:repeat(2,minmax(0,1fr));}
.nvx-grid-3{grid-template-columns:repeat(3,minmax(0,1fr));}
.nvx-grid-4{grid-template-columns:repeat(4,minmax(0,1fr));}

.nvx-layout-sidebar{
  display:grid;
  grid-template-columns:280px minmax(0,1fr);
  gap:var(--nvx-space-8);
  align-items:start;
}

/* Buttons */
.nvx-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  min-height:42px;
  padding:11px 16px;
  border-radius:14px;
  border:1px solid var(--nvx-border);
  background:#fff;
  color:var(--nvx-text);
  font-weight:900;
  font-size:14px;
  line-height:1;
  text-decoration:none;
  cursor:pointer;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
}

.nvx-btn:hover{
  transform:translateY(-1px);
  box-shadow:var(--nvx-shadow-sm);
}

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

.nvx-btn-primary:hover{
  background:var(--nvx-primary-strong);
  border-color:var(--nvx-primary-strong);
}

.nvx-btn-soft{
  background:var(--nvx-primary-soft);
  border-color:#cfe3ff;
  color:var(--nvx-primary-strong);
}

.nvx-btn-ghost{
  background:transparent;
  border-color:transparent;
  color:var(--nvx-primary);
}

.nvx-btn-disabled,
.nvx-btn[disabled],
.nvx-btn[aria-disabled="true"]{
  opacity:.55;
  pointer-events:none;
  cursor:not-allowed;
}

/* Badges / status */
.nvx-badge{
  display:inline-flex;
  align-items:center;
  gap:7px;
  padding:7px 11px;
  border-radius:999px;
  background:var(--nvx-surface-strong);
  color:var(--nvx-primary-strong);
  border:1px solid #d4e6ff;
  font-size:12px;
  font-weight:900;
  line-height:1;
  white-space:nowrap;
}

.nvx-badge-success{
  background:var(--nvx-success-soft);
  color:var(--nvx-success);
  border-color:#bfe8d8;
}

.nvx-badge-warning{
  background:var(--nvx-warning-soft);
  color:var(--nvx-warning);
  border-color:#ffe3a3;
}

.nvx-badge-danger{
  background:var(--nvx-danger-soft);
  color:var(--nvx-danger);
  border-color:#ffd1cc;
}

.nvx-badge-neutral{
  background:#f2f4f7;
  color:#475467;
  border-color:#e4e7ec;
}

/* Metadata */
.nvx-meta-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:14px;
}

.nvx-meta{
  background:var(--nvx-surface-soft);
  border:1px solid var(--nvx-border-soft);
  border-radius:var(--nvx-radius-md);
  padding:16px;
}

.nvx-meta-label{
  display:block;
  color:var(--nvx-text-muted);
  font-size:12px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.06em;
  margin-bottom:7px;
}

.nvx-meta-value{
  color:var(--nvx-text);
  font-size:15px;
  line-height:1.45;
  font-weight:800;
}

/* Tables */
.nvx-table-wrap{
  overflow:auto;
  border:1px solid var(--nvx-border-soft);
  border-radius:var(--nvx-radius-lg);
  background:#fff;
}

.nvx-table{
  width:100%;
  border-collapse:separate;
  border-spacing:0;
  font-size:14px;
}

.nvx-table th{
  text-align:left;
  color:var(--nvx-text-muted);
  font-size:12px;
  text-transform:uppercase;
  letter-spacing:.06em;
  font-weight:950;
  background:#f8fbff;
  border-bottom:1px solid var(--nvx-border-soft);
  padding:14px 16px;
}

.nvx-table td{
  padding:15px 16px;
  border-bottom:1px solid var(--nvx-border-soft);
  color:var(--nvx-text-soft);
  vertical-align:top;
}

.nvx-table tr:last-child td{border-bottom:none;}
.nvx-table tbody tr:hover td{background:#fbfdff;}

/* Forms */
.nvx-input,
.nvx-select,
.nvx-textarea{
  width:100%;
  box-sizing:border-box;
  min-height:44px;
  border-radius:14px;
  border:1px solid var(--nvx-border);
  background:#fff;
  color:var(--nvx-text);
  padding:11px 14px;
  font-size:14px;
  outline:none;
  transition:border-color .18s ease, box-shadow .18s ease;
}

.nvx-input:focus,
.nvx-select:focus,
.nvx-textarea:focus{
  border-color:#8bbdff;
  box-shadow:0 0 0 4px rgba(11,92,171,.10);
}

.nvx-label{
  display:block;
  font-size:13px;
  font-weight:900;
  color:var(--nvx-text-soft);
  margin-bottom:7px;
}

/* Notices / empty states */
.nvx-notice{
  border-radius:var(--nvx-radius-lg);
  border:1px solid var(--nvx-border);
  background:#fff;
  padding:18px;
  color:var(--nvx-text-soft);
  line-height:1.55;
}

.nvx-notice-info{
  background:#f0f7ff;
  border-color:#cfe3ff;
}

.nvx-notice-success{
  background:var(--nvx-success-soft);
  border-color:#bfe8d8;
}

.nvx-notice-warning{
  background:var(--nvx-warning-soft);
  border-color:#ffe3a3;
}

.nvx-empty{
  text-align:center;
  padding:42px 24px;
  border:1px dashed #cfd8e6;
  border-radius:var(--nvx-radius-xl);
  background:#fff;
}

.nvx-empty-title{
  margin:0;
  font-size:20px;
  font-weight:950;
  letter-spacing:-.025em;
}

.nvx-empty-text{
  margin:10px auto 0;
  max-width:620px;
  color:var(--nvx-text-muted);
  line-height:1.55;
}

/* Record / discovery helpers */
.nvx-record-shell{
  display:grid;
  grid-template-columns:220px minmax(0,1fr) 320px;
  gap:var(--nvx-space-6);
  align-items:start;
}

.nvx-cover{
  width:100%;
  aspect-ratio:2/3;
  border-radius:22px;
  background:linear-gradient(145deg,#071427,#123a63);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--nvx-shadow-md);
  object-fit:cover;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#fff;
  font-weight:950;
  letter-spacing:-.04em;
}

.nvx-record-title{
  margin:0;
  color:var(--nvx-text);
  font-size:clamp(34px,4vw,58px);
  line-height:1.04;
  letter-spacing:-.055em;
  font-weight:950;
}

.nvx-record-authors{
  margin-top:12px;
  color:var(--nvx-text-soft);
  font-size:18px;
  line-height:1.5;
}

.nvx-actions{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
}

.nvx-divider{
  height:1px;
  background:var(--nvx-border-soft);
  margin:var(--nvx-space-6) 0;
}

.nvx-sr-only{
  position:absolute;
  width:1px;
  height:1px;
  padding:0;
  margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

/* Responsive */
@media (max-width:1100px){
  .nvx-layout-sidebar,
  .nvx-record-shell{
    grid-template-columns:1fr;
  }

  .nvx-grid-4,
  .nvx-grid-3{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }

  .nvx-meta-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media (max-width:720px){
  .nvx-container,
  .nvx-container-wide{
    width:calc(100% - 28px);
  }

  .nvx-hero{padding:42px 0;}

  .nvx-grid-2,
  .nvx-grid-3,
  .nvx-grid-4,
  .nvx-meta-grid{
    grid-template-columns:1fr;
  }

  .nvx-card,
  .nvx-card-strong{
    padding:18px;
    border-radius:20px;
  }

  .nvx-actions{
    flex-direction:column;
    align-items:stretch;
  }

  .nvx-btn{width:100%;}
}