/* ============================================================
   TRUNG NGHIA - PROJECTS EDITORIAL SYSTEM
   ------------------------------------------------------------
   Architecture-magazine layout for the Projects pages:
   cong-trinh.html / cong-trinh-nhom-kinh.html / cong-trinh-noi-that.html

   Design direction: PREMIUM - LUXURY - MODERN - PROFESSIONAL.
   Dark editorial canvas, gold accents taken from the existing
   brand (#c9a96a), generous whitespace, alternating media rows.
   All class names are prefixed "ed-" to avoid conflicts with
   the legacy stylesheet (css/style.css).
   ============================================================ */

.ed-page{
  background:#0b0c0e;
  color:#e8e6e1;
  /* Cancel the legacy cream background used by .tn-content pages */
  padding-bottom:0;
}

/* ------------------------------------------------------------
   Shared typography
   ------------------------------------------------------------ */
.ed-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:#c9a96a;
  font-size:11px;
  font-weight:800;
  letter-spacing:2.6px;
  text-transform:uppercase;
}
.ed-kicker::before{
  content:"";
  width:34px;
  height:1px;
  background:#c9a96a;
  opacity:.7;
}
.ed-h1{
  color:#fff;
  font-size:clamp(34px,5.6vw,64px);
  line-height:1.08;
  letter-spacing:-1px;
  margin:14px 0;
}
.ed-h2{
  color:#fff;
  font-size:clamp(26px,3.4vw,40px);
  line-height:1.15;
  letter-spacing:-.5px;
  margin:12px 0 16px;
}
.ed-h3{
  color:#fff;
  font-size:clamp(19px,2.2vw,26px);
  line-height:1.25;
  margin:10px 0 12px;
}
.ed-lead{
  color:#c8c5be;
  font-size:clamp(15px,1.6vw,18px);
  line-height:1.85;
  max-width:760px;
}
.ed-body{
  color:#a8a5a0;
  font-size:15px;
  line-height:1.9;
}
.ed-body + .ed-body{ margin-top:14px; }
.ed-body strong{ color:#e8e6e1; }

/* ------------------------------------------------------------
   Editorial hero
   ------------------------------------------------------------ */
.ed-hero{
  position:relative;
  min-height:72vh;
  display:flex;
  align-items:flex-end;
  overflow:hidden;
  background:#0b0c0e;
}
.ed-hero-media{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  transform:scale(1.03);
  animation:ed-hero-in 2.2s cubic-bezier(.16,1,.3,1) both;
}
@keyframes ed-hero-in{
  from{ transform:scale(1.09); opacity:.4; }
  to{ transform:scale(1.03); opacity:1; }
}
.ed-hero-shade{
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(8,9,11,.9),rgba(8,9,11,.35) 55%,rgba(8,9,11,.15)),
    linear-gradient(transparent 40%,rgba(8,9,11,.95));
}
.ed-hero-inner{
  position:relative;
  z-index:2;
  padding:120px 0 64px;
}
.ed-hero-meta{
  display:flex;
  gap:22px;
  flex-wrap:wrap;
  margin-top:26px;
  color:#9d9a94;
  font-size:12px;
  letter-spacing:1.6px;
  text-transform:uppercase;
}
.ed-hero-meta span{
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.ed-hero-meta b{ color:#c9a96a; }

/* ------------------------------------------------------------
   Category index (anchor chips)
   ------------------------------------------------------------ */
.ed-index{
  position:relative;
  z-index:3;
  margin-top:-34px;
}
.ed-index-inner{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  padding:18px 22px;
  background:rgba(14,15,18,.92);
  border:1px solid rgba(201,169,106,.25);
  border-radius:14px;
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
}
.ed-index a{
  padding:9px 16px;
  border:1px solid rgba(255,255,255,.12);
  border-radius:999px;
  color:#d9d6cf;
  font-size:11.5px;
  font-weight:800;
  letter-spacing:1.6px;
  text-transform:uppercase;
  transition:background-color .3s cubic-bezier(.22,.61,.36,1),
             color .3s cubic-bezier(.22,.61,.36,1),
             border-color .3s cubic-bezier(.22,.61,.36,1),
             transform .3s cubic-bezier(.22,.61,.36,1);
}
.ed-index a:hover{
  background:#c9a96a;
  border-color:#c9a96a;
  color:#141414;
  transform:translateY(-2px);
}

/* ------------------------------------------------------------
   Editorial sections
   ------------------------------------------------------------ */
.ed-section{
  padding:88px 0;
  border-top:1px solid rgba(255,255,255,.07);
}
.ed-section:first-of-type{ border-top:0; }
.ed-section-head{
  max-width:820px;
  margin-bottom:52px;
}
.ed-section-no{
  display:block;
  color:rgba(201,169,106,.55);
  font-size:12px;
  font-weight:900;
  letter-spacing:3px;
  margin-bottom:8px;
}

/* ------------------------------------------------------------
   Feature rows - alternating image / text editorial blocks
   ------------------------------------------------------------ */
.ed-feature{
  display:grid;
  grid-template-columns:minmax(0,7fr) minmax(0,5fr);
  gap:46px;
  align-items:center;
  padding:44px 0;
}
.ed-feature:nth-child(even) .ed-media{ order:2; }
.ed-feature + .ed-feature{ border-top:1px solid rgba(255,255,255,.06); }

.ed-media{
  position:relative;
  border-radius:6px;
  overflow:hidden;
  cursor:pointer;
  background:#141518;
}
.ed-media img{
  display:block;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform 1.1s cubic-bezier(.22,.61,.36,1),filter .6s ease;
}
.ed-media::after{
  content:"";
  position:absolute;
  inset:0;
  border:1px solid rgba(255,255,255,.08);
  border-radius:6px;
  pointer-events:none;
}
/* Offset gold frame accent - quiet luxury detail */
.ed-media::before{
  content:"";
  position:absolute;
  z-index:2;
  top:18px;
  left:18px;
  width:74px;
  height:74px;
  border-top:2px solid #c9a96a;
  border-left:2px solid #c9a96a;
  opacity:.85;
  pointer-events:none;
}
.ed-feature:nth-child(even) .ed-media::before{
  left:auto;
  right:18px;
  border-left:0;
  border-right:2px solid #c9a96a;
}
.ed-caption{
  margin-top:12px;
  color:#8b8883;
  font-size:12.5px;
  letter-spacing:.4px;
  line-height:1.6;
}
.ed-caption b{
  color:#c9a96a;
  font-weight:800;
  letter-spacing:1.4px;
  text-transform:uppercase;
  font-size:10.5px;
  margin-right:8px;
}

/* Status / category chips */
.ed-chips{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  margin:2px 0 10px;
}
.ed-chip{
  padding:6px 12px;
  font-size:10px;
  font-weight:900;
  letter-spacing:1.8px;
  text-transform:uppercase;
  border-radius:3px;
  border:1px solid rgba(201,169,106,.45);
  color:#c9a96a;
}
.ed-chip.done{ border-color:rgba(140,190,120,.5); color:#9fd08a; }
.ed-chip.progress{ border-color:rgba(232,190,90,.6); color:#e8be5a; }

/* ------------------------------------------------------------
   Specification table (materials / technical data)
   Values are intentionally editable placeholders where actual
   site data is not yet available (marked in HTML comments).
   ------------------------------------------------------------ */
.ed-spec-table{
  margin:20px 0 4px;
  border-top:1px solid rgba(255,255,255,.12);
}
.ed-spec-row{
  display:grid;
  grid-template-columns:170px 1fr;
  gap:14px;
  padding:11px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
  font-size:13.5px;
  line-height:1.6;
}
.ed-spec-row dt{
  color:#c9a96a;
  font-weight:800;
  font-size:10.5px;
  letter-spacing:1.8px;
  text-transform:uppercase;
  padding-top:3px;
}
.ed-spec-row dd{
  margin:0;
  color:#c6c3bd;
}
.ed-spec-row dd .ed-tbd{ color:#7d7a75; font-style:italic; }

/* ------------------------------------------------------------
   Pull quote
   ------------------------------------------------------------ */
.ed-quote{
  margin:56px auto;
  max-width:860px;
  padding:38px 42px;
  border-left:3px solid #c9a96a;
  background:linear-gradient(90deg,rgba(201,169,106,.07),transparent 65%);
}
.ed-quote p{
  margin:0;
  color:#eceae5;
  font-size:clamp(18px,2.4vw,25px);
  line-height:1.55;
  font-weight:300;
  letter-spacing:.2px;
}
.ed-quote cite{
  display:block;
  margin-top:16px;
  color:#c9a96a;
  font-size:11px;
  font-weight:800;
  letter-spacing:2.4px;
  text-transform:uppercase;
  font-style:normal;
}

/* ------------------------------------------------------------
   Photo editorial grid (magazine style, varied tile sizes)
   ------------------------------------------------------------ */
.ed-gallery{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:14px;
}
.ed-photo{
  position:relative;
  grid-column:span 2;
  margin:0;
  overflow:hidden;
  border-radius:5px;
  cursor:zoom-in;
  background:#141518;
}
.ed-photo img{
  display:block;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
}
.ed-photo.wide{ grid-column:span 3; }
.ed-photo.tall img{ aspect-ratio:3/4; }
.ed-photo figcaption{
  position:absolute;
  left:0; right:0; bottom:0;
  padding:26px 16px 12px;
  color:#e6e4df;
  font-size:12px;
  letter-spacing:.4px;
  background:linear-gradient(transparent,rgba(0,0,0,.78));
  opacity:0;
  transform:translate3d(0,6px,0);
  transition:opacity .45s cubic-bezier(.22,.61,.36,1),
             transform .45s cubic-bezier(.22,.61,.36,1);
  pointer-events:none;
}
.ed-photo:hover figcaption,
.ed-photo:focus-visible figcaption{
  opacity:1;
  transform:translate3d(0,0,0);
}
/* On touch screens captions are always visible (no hover needed) */
@media (hover:none) and (pointer:coarse){
  .ed-photo figcaption{ opacity:1; transform:none; }
}

/* ------------------------------------------------------------
   Ongoing-projects dossier (editable placeholder structure)
   ------------------------------------------------------------ */
.ed-dossier-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:18px;
}
.ed-dossier-card{
  padding:28px 26px;
  background:#101114;
  border:1px solid rgba(255,255,255,.09);
  border-radius:8px;
  position:relative;
  overflow:hidden;
  transition:border-color .35s cubic-bezier(.22,.61,.36,1),
             transform .35s cubic-bezier(.22,.61,.36,1);
}
.ed-dossier-card:hover{
  border-color:rgba(201,169,106,.5);
  transform:translateY(-4px);
}
.ed-dossier-card::before{
  content:"";
  position:absolute;
  top:0; left:0;
  width:100%;
  height:2px;
  background:linear-gradient(90deg,#c9a96a,transparent);
  opacity:.6;
}
.ed-dossier-card h3{
  color:#fff;
  font-size:17px;
  margin:8px 0 10px;
}
.ed-dossier-card .ed-spec-row{ grid-template-columns:110px 1fr; }
.ed-dossier-note{
  margin-top:26px;
  padding:16px 20px;
  border:1px dashed rgba(201,169,106,.4);
  border-radius:8px;
  color:#a5a29c;
  font-size:13px;
  line-height:1.7;
}

/* ------------------------------------------------------------
   Process steps (numbered editorial list)
   ------------------------------------------------------------ */
.ed-process{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-top:36px;
}
.ed-process-step{
  padding:26px 22px;
  background:#101114;
  border:1px solid rgba(255,255,255,.09);
  border-radius:8px;
}
.ed-process-step .no{
  color:#c9a96a;
  font-weight:900;
  font-size:12px;
  letter-spacing:2px;
}
.ed-process-step h3{
  color:#fff;
  font-size:16px;
  margin:10px 0 8px;
}

/* ------------------------------------------------------------
   Editorial conclusion + CTA
   ------------------------------------------------------------ */
.ed-conclusion{
  padding:74px 0 90px;
  border-top:1px solid rgba(255,255,255,.07);
}
.ed-cta{
  margin-top:44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
  padding:34px 36px;
  border-radius:12px;
  background:linear-gradient(115deg,#141619,#2a2620);
  border:1px solid rgba(201,169,106,.3);
}
.ed-cta h2{ margin:8px 0; }
.ed-cta-links{ display:flex; gap:10px; flex-wrap:wrap; }
.ed-cta-links a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 20px;
  background:#c9a96a;
  border:1px solid #c9a96a;
  color:#141414;
  font-weight:800;
  font-size:12px;
  letter-spacing:1.4px;
  text-transform:uppercase;
  transition:background-color .3s cubic-bezier(.22,.61,.36,1),
             color .3s cubic-bezier(.22,.61,.36,1),
             transform .3s cubic-bezier(.22,.61,.36,1),
             box-shadow .3s cubic-bezier(.22,.61,.36,1);
}
.ed-cta-links a:hover{
  background:#e0c487;
  transform:translateY(-3px);
  box-shadow:0 12px 28px rgba(201,169,106,.25);
}
.ed-cta-links a:active{ transform:translateY(-1px) scale(.98); }
.ed-cta-links a.secondary{
  background:transparent;
  color:#fff;
  border-color:rgba(201,169,106,.6);
}

/* ------------------------------------------------------------
   Lightbox overlay (driven by js/effects.js)
   ------------------------------------------------------------ */
.fx-lightbox{
  position:fixed;
  inset:0;
  z-index:4000;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:34px;
  background:rgba(5,6,7,.92);
  opacity:0;
  visibility:hidden;
  transition:opacity .35s cubic-bezier(.22,.61,.36,1),
             visibility 0s linear .35s;
}
.fx-lightbox.open{
  opacity:1;
  visibility:visible;
  transition:opacity .35s cubic-bezier(.22,.61,.36,1);
}
/* Two-column project viewer: large image + full description */
.fx-lightbox-body{
  display:flex;
  align-items:center;
  gap:30px;
  width:min(1140px,94vw);
}
.fx-lightbox img{
  max-width:94%;
  max-height:88vh;
  object-fit:contain;
  border-radius:4px;
  box-shadow:0 30px 80px rgba(0,0,0,.6);
  transform:scale(.97);
  transition:transform .35s cubic-bezier(.22,.61,.36,1);
}
.fx-lightbox.open img{ transform:scale(1); }
.fx-lightbox-body img{
  flex:1 1 auto;
  min-width:0;
  max-width:100%;
  max-height:78vh;
  height:auto;
}
.fx-lightbox-info{
  flex:0 0 320px;
  min-width:0;
  max-width:380px;
  color:#e8e6e1;
}
.fx-lightbox-kicker{
  color:#c9a96a;
  font-size:10px;
  font-weight:900;
  letter-spacing:2.6px;
  text-transform:uppercase;
  margin-bottom:10px;
}
.fx-lightbox-info h3{
  color:#fff;
  font-size:clamp(18px,2vw,23px);
  line-height:1.3;
  margin:0 0 12px;
}
.fx-lightbox-desc{
  margin:0;
  color:#b9b6b0;
  font-size:14px;
  line-height:1.8;
}
.fx-lightbox-spec{
  margin:16px 0 0;
  padding-top:14px;
  border-top:1px solid rgba(201,169,106,.35);
  color:#c9a96a;
  font-size:12px;
  line-height:1.7;
  letter-spacing:.3px;
}
@media (max-width:940px){
  .fx-lightbox{
    padding:20px;
    overflow-y:auto;
  }
  .fx-lightbox-body{
    flex-direction:column;
    align-items:flex-start;
    gap:18px;
    margin:auto;
  }
  .fx-lightbox-body img{
    max-width:100%;
    max-height:52vh;
  }
  .fx-lightbox-info{
    max-width:100%;
    min-width:0;
  }
}
.fx-lightbox-close{
  position:absolute;
  top:20px; right:24px;
  width:48px; height:48px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.25);
  background:rgba(255,255,255,.06);
  color:#fff;
  font-size:26px;
  cursor:pointer;
  transition:background-color .3s cubic-bezier(.22,.61,.36,1),
             transform .3s cubic-bezier(.22,.61,.36,1);
}
.fx-lightbox-close:hover{
  background:rgba(201,169,106,.9);
  color:#141414;
  transform:rotate(90deg);
}

/* ------------------------------------------------------------
   Responsive
   ------------------------------------------------------------ */
@media (max-width:1020px){
  .ed-feature{
    grid-template-columns:1fr;
    gap:26px;
    padding:34px 0;
  }
  .ed-feature:nth-child(even) .ed-media{ order:0; }
  .ed-process{ grid-template-columns:repeat(2,1fr); }
  .ed-dossier-grid{ grid-template-columns:repeat(2,1fr); }
  .ed-gallery{ grid-template-columns:repeat(4,1fr); }
  .ed-photo,.ed-photo.wide{ grid-column:span 2; }
}
@media (max-width:640px){
  .ed-section{ padding:58px 0; }
  .ed-hero-inner{ padding:96px 0 56px; }
  .ed-hero{ min-height:64vh; }
  .ed-quote{ padding:26px 22px; margin:36px auto; }
  .ed-cta{ padding:26px 22px; }
  .ed-process{ grid-template-columns:1fr; }
  .ed-dossier-grid{ grid-template-columns:1fr; }
  .ed-gallery{ grid-template-columns:1fr 1fr; gap:10px; }
  .ed-photo,.ed-photo.wide{ grid-column:span 1; }
  .ed-spec-row{ grid-template-columns:1fr; gap:4px; }
  .ed-index-inner{ padding:14px 16px; }
}