/* ===========================================================
   REDTRAZO — sitio de obras de redes informáticas
   Identidad: planos técnicos / cuaderno de obra
   =========================================================== */

:root{
  --ink-900:#0E2A43;
  --blueprint-800:#123A5E;
  --blueprint-700:#1A4A73;
  --paper-50:#F6F3EA;
  --paper-100:#EFEBDF;
  --accent-cyan:#1FA9C2;
  --accent-cyan-dim:#1FA9C233;
  --accent-amber:#C97F2A;
  --ok-green:#2E7D32;
  --line-200:#D8D2C0;
  --line-300:#C2BBA6;
  --text-muted:#5C6B7A;

  --font-display:'Space Grotesk', sans-serif;
  --font-body:'IBM Plex Sans', sans-serif;
  --font-mono:'IBM Plex Mono', monospace;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}

body{
  margin:0;
  background:var(--paper-50);
  color:var(--ink-900);
  font-family:var(--font-body);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
}

a{color:var(--accent-cyan);text-decoration:none;}
a:hover{text-decoration:underline;}

button{
  font-family:inherit;
  cursor:pointer;
}

:focus-visible{
  outline:2px solid var(--accent-cyan);
  outline-offset:2px;
}

/* ---------- header ---------- */
.site-header{
  background:var(--blueprint-800);
  border-bottom:3px solid var(--accent-cyan);
  color:#fff;
}
.header-inner{
  max-width:1180px;
  margin:0 auto;
  padding:22px 28px;
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.brand{
  display:flex;
  align-items:baseline;
  gap:10px;
}
.brand-mark{
  font-family:var(--font-mono);
  font-weight:700;
  letter-spacing:.12em;
  font-size:1.25rem;
  text-transform:uppercase;
}
.brand-mark span{color:var(--accent-cyan);}
.brand-tagline{
  font-size:.85rem;
  color:#C9D9E4;
  font-family:var(--font-body);
}
.header-meta{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.06em;
  color:#9FC2D2;
  text-transform:uppercase;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:46px 28px 34px;
  background-image:
    linear-gradient(var(--paper-50) 0%, var(--paper-50) 100%),
    repeating-linear-gradient(0deg, var(--line-200) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(90deg, var(--line-200) 0 1px, transparent 1px 28px);
  border-bottom:1px solid var(--line-200);
}
.hero-inner{
  max-width:1180px;
  margin:0 auto;
}
.hero h1{
  font-family:var(--font-display);
  font-size:clamp(1.6rem, 2.4vw, 2.1rem);
  margin:0 0 8px;
  max-width:46ch;
}
.hero p{
  margin:0;
  max-width:56ch;
  color:var(--text-muted);
}

/* ---------- toolbar (búsqueda / filtros) ---------- */
.toolbar{
  max-width:1180px;
  margin:0 auto;
  padding:22px 28px 0;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  align-items:center;
}
.search-field{
  flex:1 1 240px;
  position:relative;
}
.search-field input{
  width:100%;
  padding:10px 14px;
  font-family:var(--font-mono);
  font-size:.9rem;
  border:1px solid var(--line-300);
  background:#fff;
  color:var(--ink-900);
  border-radius:2px;
}
.search-field input::placeholder{color:#9A9180;}
.status-filters{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.chip-btn{
  border:1px solid var(--line-300);
  background:#fff;
  color:var(--ink-900);
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.05em;
  text-transform:uppercase;
  padding:8px 12px;
  border-radius:2px;
  transition:background .15s, color .15s, border-color .15s;
}
.chip-btn[aria-pressed="true"]{
  background:var(--ink-900);
  color:#fff;
  border-color:var(--ink-900);
}
.chip-btn:hover{border-color:var(--accent-cyan);}

/* ---------- listado de obras ---------- */
.project-section{
  max-width:1180px;
  margin:0 auto;
  padding:24px 28px 60px;
}
.section-label{
  font-family:var(--font-mono);
  font-size:.75rem;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--text-muted);
  margin:0 0 14px;
}
.project-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:18px;
}

.card{
  position:relative;
  background:#fff;
  border:1px solid var(--line-200);
  padding:20px 18px 18px;
  cursor:pointer;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
  text-align:left;
}
.card:hover, .card:focus-visible{
  transform:translateY(-3px);
  box-shadow:0 10px 24px -16px rgba(14,42,67,.45);
  border-color:var(--accent-cyan);
}
/* marcas de registro tipo plano técnico, en las 4 esquinas */
.card::before, .card::after,
.card .corner-br, .card .corner-bl{
  content:"";
  position:absolute;
  width:14px;
  height:14px;
  pointer-events:none;
}
.card::before{ /* top-left */
  top:-1px; left:-1px;
  border-top:2px solid var(--ink-900);
  border-left:2px solid var(--ink-900);
}
.card::after{ /* top-right */
  top:-1px; right:-1px;
  border-top:2px solid var(--ink-900);
  border-right:2px solid var(--ink-900);
}
.card .corner-bl{
  bottom:-1px; left:-1px;
  border-bottom:2px solid var(--ink-900);
  border-left:2px solid var(--ink-900);
}
.card .corner-br{
  bottom:-1px; right:-1px;
  border-bottom:2px solid var(--ink-900);
  border-right:2px solid var(--ink-900);
}
.card:hover::before, .card:hover::after,
.card:hover .corner-bl, .card:hover .corner-br{
  border-color:var(--accent-cyan);
}

.card-code{
  font-family:var(--font-mono);
  font-size:.72rem;
  letter-spacing:.08em;
  color:var(--accent-cyan);
}
.card-title{
  font-family:var(--font-display);
  font-size:1.08rem;
  margin:4px 0 10px;
}
.card-meta{
  font-size:.82rem;
  color:var(--text-muted);
  margin:0 0 14px;
}
.card-meta strong{color:var(--ink-900);font-weight:600;}

.card-foot{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  flex-wrap:wrap;
}
.file-tags{
  display:flex;
  gap:6px;
}
.file-tag{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.04em;
  padding:3px 7px;
  border:1px solid var(--line-300);
  color:var(--text-muted);
  border-radius:2px;
}

.status-chip{
  font-family:var(--font-mono);
  font-size:.68rem;
  letter-spacing:.05em;
  text-transform:uppercase;
  padding:3px 8px;
  border-radius:2px;
}
.status-finalizado{background:#E7F1E6;color:var(--ok-green);}
.status-en-obra{background:#F7EADA;color:var(--accent-amber);}
.status-pendiente{background:#EDEAE0;color:var(--text-muted);}

.empty-state{
  font-family:var(--font-mono);
  color:var(--text-muted);
  padding:30px 0;
}

/* ---------- vista de detalle ---------- */
.detail-section{
  max-width:1180px;
  margin:0 auto;
  padding:0 28px 70px;
}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.04em;
  text-transform:uppercase;
  color:var(--ink-900);
  background:none;
  border:none;
  padding:18px 0 8px;
}
.back-link:hover{color:var(--accent-cyan);text-decoration:none;}

.title-block{
  position:relative;
  border:1px solid var(--ink-900);
  background:#fff;
  padding:18px 20px;
  margin-bottom:18px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:18px;
  align-items:center;
}
.title-block::before, .title-block::after{
  content:"";
  position:absolute;
  width:14px;height:14px;
}
.title-block::before{top:-1px;left:-1px;border-top:2px solid var(--accent-cyan);border-left:2px solid var(--accent-cyan);}
.title-block::after{bottom:-1px;right:-1px;border-bottom:2px solid var(--accent-cyan);border-right:2px solid var(--accent-cyan);}

.title-block-code{
  font-family:var(--font-mono);
  font-size:.78rem;
  color:var(--accent-cyan);
  letter-spacing:.06em;
}
.title-block-name{
  font-family:var(--font-display);
  font-size:1.3rem;
  margin:2px 0 4px;
}
.title-block-meta{
  font-size:.82rem;
  color:var(--text-muted);
}
.title-block-meta span + span::before{
  content:"·";
  margin:0 6px;
  color:var(--line-300);
}

.tabs{
  display:flex;
  gap:4px;
  border-bottom:1px solid var(--line-300);
  margin-bottom:0;
}
.tab-btn{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.05em;
  text-transform:uppercase;
  padding:11px 18px;
  background:none;
  border:none;
  border-bottom:2px solid transparent;
  color:var(--text-muted);
  margin-bottom:-1px;
}
.tab-btn[aria-selected="true"]{
  color:var(--ink-900);
  border-bottom-color:var(--accent-cyan);
}
.tab-btn:hover{color:var(--ink-900);}

.tab-panel{
  border:1px solid var(--line-200);
  border-top:none;
  background:#fff;
  min-height:560px;
  padding:0;
}
.tab-panel[hidden]{display:none;}

.viewer-toolbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 16px;
  border-bottom:1px solid var(--line-200);
  font-family:var(--font-mono);
  font-size:.72rem;
  color:var(--text-muted);
  letter-spacing:.04em;
  flex-wrap:wrap;
  gap:8px;
}
.viewer-toolbar a{font-size:.72rem;}

.pdf-frame{
  width:100%;
  height:640px;
  border:none;
  display:block;
}

.viewer-empty{
  padding:60px 24px;
  text-align:center;
  color:var(--text-muted);
  font-family:var(--font-mono);
  font-size:.85rem;
}
.viewer-empty code{
  display:inline-block;
  margin-top:8px;
  padding:6px 10px;
  background:var(--paper-100);
  border:1px solid var(--line-200);
  color:var(--ink-900);
}

.viewer-loading{
  padding:60px 24px;
  text-align:center;
  color:var(--text-muted);
  font-family:var(--font-mono);
  font-size:.85rem;
}

/* tabla de planilla de cables */
.sheet-scroll{
  overflow:auto;
  max-height:640px;
}
table.cable-sheet{
  width:100%;
  border-collapse:collapse;
  font-family:var(--font-mono);
  font-size:.78rem;
}
table.cable-sheet thead th{
  position:sticky;
  top:0;
  background:var(--blueprint-800);
  color:#fff;
  text-align:left;
  padding:9px 12px;
  font-weight:500;
  letter-spacing:.03em;
  white-space:nowrap;
}
table.cable-sheet tbody td{
  padding:7px 12px;
  border-bottom:1px solid var(--line-200);
  white-space:nowrap;
}
table.cable-sheet tbody tr:nth-child(even){background:var(--paper-50);}
table.cable-sheet tbody tr:hover{background:var(--accent-cyan-dim);}
.tag-ok{color:var(--ok-green);font-weight:600;}
.tag-warn{color:var(--accent-amber);font-weight:600;}

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line-200);
  padding:22px 28px;
  text-align:center;
  font-size:.78rem;
  color:var(--text-muted);
}

/* ---------- utilidades / animación mínima ---------- */
.fade-in{animation:fadeIn .25s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(4px);}to{opacity:1;transform:translateY(0);}}

@media (prefers-reduced-motion: reduce){
  .fade-in{animation:none;}
  html{scroll-behavior:auto;}
}

@media (max-width: 720px){
  .title-block{grid-template-columns:1fr;text-align:left;}
  .pdf-frame{height:480px;}
}


/* ==========================
   HTML de obra individual
   ========================== */

.detail-section{
    max-width:1180px;
    margin:0 auto;
    padding:0 28px 70px;
}

.back-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-family:var(--font-mono);
    font-size:.78rem;
    letter-spacing:.04em;
    text-transform:uppercase;
    color:var(--ink-900);
    background:none;
    border:none;
    padding:18px 0 8px;
    cursor:pointer;
}

.back-link:hover{
    color:var(--accent-cyan);
}

.sheet-scroll{
    overflow:auto;
    max-height:640px;
}

.sheet-scroll table{
    width:100%;
    border-collapse:collapse;
    font-family:var(--font-mono);
    font-size:.78rem;
}

.sheet-scroll th{
    position:sticky;
    top:0;
    background:var(--blueprint-800);
    color:#fff;
    padding:9px 12px;
    text-align:left;
}

.sheet-scroll td{
    padding:7px 12px;
    border-bottom:1px solid var(--line-200);
}

.sheet-scroll tr:nth-child(even){
    background:var(--paper-50);
}