/* =====================================================================
   NOVATEC — Design System (custom layer เสริม Tailwind)
   หลักการ CI: 70% dark premium base • 20% metallic/technical • 10% electric blue
   สไตล์: เหลี่ยม คม เท่ ไม่มน — carbon texture + blue edge + chevron + metallic
   ===================================================================== */

:root {
  --nv-black:    #0A0E14;
  --nv-carbon:   #10151D;
  --nv-carbon-2: #161C24;
  --nv-steel:    #1F2730;
  --nv-line:     #2A333F;
  --nv-titanium: #CED4DA;
  --nv-mute:     #8A94A3;
  --nv-blue:     #2563EB;
  --nv-blue-lt:  #3B82F6;
  --nv-ice:      #F7F9FB;
}

html { scroll-behavior: smooth; }

body {
  background-color: var(--nv-black);
  color: var(--nv-titanium);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--nv-blue); color: #fff; }

/* ---- scrollbar เท่ ๆ ---- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--nv-black); }
::-webkit-scrollbar-thumb { background: var(--nv-steel); border: 2px solid var(--nv-black); }
::-webkit-scrollbar-thumb:hover { background: var(--nv-blue); }

/* ---- ตัวหนังสือโลหะ (metallic silver) แบบโลโก้ ---- */
.text-metal {
  background: linear-gradient(180deg, #FFFFFF 0%, #D3D9E0 38%, #8A93A0 62%, #E6EAEF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 1px 0 rgba(255,255,255,0.05);
}

/* ---- พื้นผิว carbon + เส้น grid บาง ๆ (technical detail) ---- */
.bg-carbon {
  background-color: var(--nv-carbon);
  background-image:
    linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
  background-size: 44px 44px;
}

.bg-grid {
  background-image:
    linear-gradient(rgba(37,99,235,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ---- เส้นขอบเรืองแสงสีน้ำเงิน (blue edge line) ---- */
.edge-blue { position: relative; }
.edge-blue::before {
  content: "";
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--nv-blue);
  box-shadow: 0 0 16px 0 rgba(37,99,235,0.55);
}

.hair-top    { border-top: 1px solid var(--nv-line); }
.hair-bottom { border-bottom: 1px solid var(--nv-line); }

/* ---- chevron motif (ลูกศรทิศทาง) เป็น texture ตกแต่ง ---- */
.chevrons {
  background-image: repeating-linear-gradient(
    -60deg,
    rgba(255,255,255,0.04) 0px, rgba(255,255,255,0.04) 2px,
    transparent 2px, transparent 16px
  );
}

/* ---- eyebrow label เทคนิค ---- */
.eyebrow {
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 600;
  font-size: 0.72rem;
  color: var(--nv-blue-lt);
}

/* ---- ปุ่มปกติ ---- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-weight: 600; letter-spacing: 0.04em;
  padding: 0.85rem 1.6rem;
  border-radius: 6px;
  transition: all 0.18s ease;
  text-transform: uppercase; font-size: 0.82rem;
}
.btn-primary {
  background: var(--nv-blue); color: #fff;
  box-shadow: 0 0 0 1px rgba(59,130,246,0.5), 0 8px 30px -8px rgba(37,99,235,0.6);
}
.btn-primary:hover { background: var(--nv-blue-lt); transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: var(--nv-ice);
  box-shadow: inset 0 0 0 1px var(--nv-line);
}
.btn-ghost:hover { box-shadow: inset 0 0 0 1px var(--nv-blue); color: #fff; }

/* ---- การ์ดปกติ ---- */
.card-cut {
  background: linear-gradient(180deg, var(--nv-carbon-2) 0%, var(--nv-carbon) 100%);
  border: 1px solid var(--nv-line);
  border-radius: 8px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card-cut:hover { border-color: rgba(59,130,246,0.6); transform: translateY(-3px); }

/* ---- corner accent (ปิดไว้ — ใช้มุมปกติ) ---- */
.corner-accent { position: relative; }

/* ---- เนื้อหาบทความ (prose) ---- */
.prose-nv { color: var(--nv-titanium); line-height: 1.85; font-size: 1.06rem; }
.prose-nv h2 { color: var(--nv-ice); font-weight: 700; font-size: 1.55rem; margin: 2rem 0 0.9rem; letter-spacing: -0.01em; }
.prose-nv h3 { color: var(--nv-ice); font-weight: 700; font-size: 1.25rem; margin: 1.6rem 0 0.7rem; }
.prose-nv p  { margin: 0 0 1.15rem; }
.prose-nv a  { color: var(--nv-blue-lt); text-decoration: underline; text-underline-offset: 3px; }
.prose-nv ul, .prose-nv ol { margin: 0 0 1.15rem 1.3rem; }
.prose-nv ul { list-style: none; }
.prose-nv ul li { position: relative; padding-left: 1.3rem; margin-bottom: 0.5rem; }
.prose-nv ul li::before { content: "›"; position: absolute; left: 0; color: var(--nv-blue-lt); font-weight: 700; }
.prose-nv ol li { margin-bottom: 0.5rem; }
.prose-nv img { border: 1px solid var(--nv-line); margin: 1.5rem 0; max-width: 100%; }
.prose-nv strong { color: var(--nv-ice); }
.prose-nv .lead { color: var(--nv-ice); font-size: 1.2rem; line-height: 1.7; margin-bottom: 1.5rem; }
.prose-nv figure { margin: 1.8rem 0; }
.prose-nv figure img { margin: 0; width: 100%; }
.prose-nv figcaption { margin-top: 0.7rem; font-size: 0.85rem; color: var(--nv-mute); line-height: 1.55; border-left: 2px solid var(--nv-blue); padding-left: 0.8rem; }
.prose-nv blockquote { margin: 2rem 0; padding: 1.3rem 1.5rem; border-left: 3px solid var(--nv-blue); background: var(--nv-carbon); }
.prose-nv blockquote p { color: var(--nv-ice); font-size: 1.2rem; font-style: italic; line-height: 1.6; margin: 0; }
.prose-nv blockquote cite { display: block; margin-top: 0.8rem; font-style: normal; font-size: 0.9rem; color: var(--nv-blue-lt); }

/* ---- reveal on scroll ---- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---- underline animation ลิงก์เมนู ---- */
.nav-link { position: relative; }
.nav-link::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: var(--nv-blue); transition: width .22s ease;
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.font-th { font-family: 'Noto Sans Thai', sans-serif; }

/* =====================================================================
   PARALLAX / DEPTH  (สไตล์ diamante.io ปรับเข้ากับ CI NOVATEC)
   ===================================================================== */

/* layer พื้นหลังพารัลแลกซ์ */
[data-parallax] { will-change: transform; }
[data-depth]    { will-change: transform; transition: transform .05s linear; }

/* ฉาก hero แบบมีมิติ */
.depth-scene { position: relative; }
.depth-layer { position: absolute; pointer-events: none; }

/* ก้อนแสงเรืองเบลอ (glow orb) */
.orb {
  position: absolute; border-radius: 9999px;
  filter: blur(90px); opacity: 0.5; pointer-events: none;
}
.orb-blue  { background: radial-gradient(circle, rgba(37,99,235,.55), transparent 70%); }
.orb-steel { background: radial-gradient(circle, rgba(120,140,170,.28), transparent 70%); }

/* ข้อความ watermark ขนาดใหญ่ (parallax) */
.watermark {
  font-weight: 900; letter-spacing: 0.08em; line-height: 0.9;
  color: transparent; -webkit-text-stroke: 1px rgba(206,212,218,0.08);
  user-select: none; pointer-events: none; white-space: nowrap;
}

/* แถวลูกศร chevron ที่ลอยเป็นเลเยอร์ */
.chevron-row {
  display: flex; gap: 10px; pointer-events: none;
}
.chevron-row span {
  width: 26px; height: 54px;
  clip-path: polygon(0 0, 55% 0, 100% 50%, 55% 100%, 0 100%, 45% 50%);
  background: linear-gradient(180deg, rgba(37,99,235,.45), rgba(37,99,235,.08));
}

/* scroll progress bar บนสุด */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 100%;
  background: linear-gradient(90deg, var(--nv-blue), var(--nv-blue-lt));
  transform: scaleX(0); transform-origin: 0 50%; z-index: 60;
  box-shadow: 0 0 12px rgba(37,99,235,.6);
}

/* หัวข้อพร้อม fade เลื่อนเข้า (ใช้กับ hero) */
.hero-rise { animation: heroRise .9s cubic-bezier(.2,.7,.2,1) both; }
.hero-rise-2 { animation: heroRise .9s cubic-bezier(.2,.7,.2,1) .12s both; }
.hero-rise-3 { animation: heroRise .9s cubic-bezier(.2,.7,.2,1) .24s both; }
@keyframes heroRise { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }

/* floating ลอยขึ้นลงช้า ๆ */
.float-slow { animation: floatY 7s ease-in-out infinite; }
@keyframes floatY { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* ---- HUD corner brackets (มุมกรอบเทคนิค) ---- */
.hud { position: absolute; width: 22px; height: 22px; border: 2px solid rgba(59,130,246,.55); pointer-events: none; }
.hud-tl { top: 0; left: 0; border-right: 0; border-bottom: 0; }
.hud-tr { top: 0; right: 0; border-left: 0; border-bottom: 0; }
.hud-bl { bottom: 0; left: 0; border-right: 0; border-top: 0; }
.hud-br { bottom: 0; right: 0; border-left: 0; border-top: 0; }

/* ---- แสงกวาด (shine sweep) สำหรับ hero visual ---- */
.shine-sweep { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.shine-sweep::before {
  content: ""; position: absolute; top: -60%; left: -70%;
  width: 45%; height: 220%; transform: rotate(18deg);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.14), transparent);
  animation: sweep 6.5s ease-in-out infinite;
}
@keyframes sweep { 0% { left: -70%; } 55% { left: 135%; } 100% { left: 135%; } }

/* ---- โชว์เคสสินค้าใน hero (glossy panel + beads) ---- */
.showcase {
  position: relative; aspect-ratio: 4/3.4; overflow: hidden;
  background:
    radial-gradient(120% 90% at 70% 10%, rgba(37,99,235,.22), transparent 55%),
    linear-gradient(150deg, #131a25 0%, #0c1119 55%, #0a0e14 100%);
  border: 1px solid var(--nv-line);
  border-radius: 10px;
}
.bead { position: absolute; border-radius: 9999px;
  background: radial-gradient(circle at 35% 30%, rgba(255,255,255,.9), rgba(180,200,230,.25) 45%, rgba(10,14,20,.15) 70%);
  box-shadow: 0 2px 6px rgba(0,0,0,.4), inset 0 -1px 2px rgba(0,0,0,.3); }

/* =====================================================================
   PRODUCT CARDS (premium)
   ===================================================================== */
.pcard {
  position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--nv-carbon-2) 0%, var(--nv-carbon) 100%);
  border: 1px solid var(--nv-line);
  border-radius: 8px;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.pcard:hover { transform: translateY(-4px); border-color: rgba(59,130,246,.6); box-shadow: 0 20px 50px -24px rgba(37,99,235,.55); }

.pcard-swatch { position: relative; height: 128px; overflow: hidden; border-bottom: 1px solid var(--nv-line); }
.pcard-swatch .lbl { position: absolute; left: 14px; bottom: 10px; z-index: 2; }
.pcard-swatch .chev { position: absolute; inset: 0; opacity: .5;
  background-image: repeating-linear-gradient(-60deg, rgba(255,255,255,.05) 0 2px, transparent 2px 15px); }
/* ประเภทฟิล์ม */
.sw-gloss   { background: radial-gradient(130% 90% at 75% 15%, rgba(59,130,246,.35), transparent 60%), linear-gradient(140deg,#101a2b,#0c1119); }
.sw-matte   { background: linear-gradient(140deg,#191d23,#0f1319); }
.sw-matte::after { content:""; position:absolute; inset:0; background:linear-gradient(140deg,rgba(255,255,255,.03),transparent); }
.sw-colored { background: linear-gradient(120deg,#0f1420,#15233f 35%,#241a3a 65%,#0f1420); }
.sw-other   { background: linear-gradient(140deg,#141a22,#0c1119); }
.pcard-swatch .gloss-line { position:absolute; top:0; left:-40%; width:35%; height:100%; transform:skewX(-18deg);
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent); transition:left .7s ease; }
.pcard:hover .gloss-line { left:130%; }

.chip { display:inline-block; font-size:.68rem; letter-spacing:.02em; color:var(--nv-titanium);
  border:1px solid var(--nv-line); padding:.2rem .55rem; transition: border-color .15s ease, color .15s ease, background-color .15s ease; }
.chip:hover { border-color: var(--nv-blue); color: var(--nv-ice); }
.chip.is-active { border-color: var(--nv-blue); color: var(--nv-ice); background: rgba(37,99,235,.12); box-shadow: 0 0 0 1px rgba(59,130,246,.35); }

/* ---- สารบัญบทความ (TOC) ---- */
.toc-box {
  border: 1px solid var(--nv-line);
  background: linear-gradient(180deg, var(--nv-carbon-2) 0%, var(--nv-carbon) 100%);
  padding: 1.15rem 1.25rem;
}
.toc-box ol { list-style: none; margin: 0; padding: 0; }
.toc-box li { margin-top: .45rem; font-size: .85rem; }
.toc-box li.toc-sub { padding-left: 1.1rem; }
.toc-box a { color: var(--nv-mute); display: inline-flex; align-items: center; gap: .55rem; line-height: 1.5; transition: color .15s ease; }
.toc-box a::before { content: "›"; color: var(--nv-blue-lt); opacity: .55; }
.toc-box a:hover { color: var(--nv-ice); }
.toc-box a.is-active { color: var(--nv-ice); font-weight: 600; }
.toc-box a.is-active::before { opacity: 1; }
.toc-box details > summary { list-style: none; }
.toc-box details > summary::-webkit-details-marker { display: none; }
.toc-box details[open] .toc-chev { transform: rotate(180deg); }
.toc-chev { display: inline-block; transition: transform .2s ease; font-size: .8rem; }

/* หัวข้อในบทความเลื่อนลงไม่ชน header */
.prose-nv h2, .prose-nv h3, .prose-nv h4 { scroll-margin-top: 96px; }

@media (prefers-reduced-motion: reduce) {
  .hero-rise, .hero-rise-2, .hero-rise-3, .float-slow { animation: none; }
  .shine-sweep::before { animation: none; }
  [data-parallax], [data-depth] { transform: none !important; }
}