/* ==========================================================================
   NARMDA FORGE & FITTING — Core Design System
   Palette extracted from logo: Deep Navy Blue · Steel Grey · White
   ========================================================================== */

:root {
  /* ---- Brand ---- */
  --navy-900: #0a1a33;
  --navy-800: #0d2140;
  --navy-700: #113058;
  --navy-600: #17457f;
  --navy-500: #1e5aa6;
  --navy-400: #3b78c4;

  --steel-900: #2b2f36;
  --steel-700: #454b54;
  --steel-500: #6b7280;
  --steel-400: #9aa2ad;
  --steel-300: #c4cad2;
  --steel-200: #e2e6eb;
  --steel-100: #f1f3f6;

  --white: #ffffff;
  --off-white: #f7f9fb;

  /* ---- Semantic ---- */
  --brand: var(--navy-700);
  --brand-strong: var(--navy-900);
  --accent: var(--navy-500);
  --text: #12233d;
  --text-soft: #4a5568;
  --text-muted: #7a8699;
  --bg: var(--white);
  --bg-alt: var(--off-white);
  --line: rgba(17, 48, 88, 0.10);
  --success: #1f9d55;
  --warning: #d9822b;
  --danger: #d64545;

  /* ---- Gradients ---- */
  --grad-navy: linear-gradient(135deg, var(--navy-800) 0%, var(--navy-600) 100%);
  --grad-steel: linear-gradient(135deg, #d7dce2 0%, #aab2bd 40%, #eef1f4 60%, #b9c0c9 100%);
  --grad-hero-overlay: linear-gradient(90deg, rgba(8, 20, 40, 0.82) 0%, rgba(8, 20, 40, 0.45) 55%, rgba(8, 20, 40, 0.30) 100%);

  /* ---- Shadows ---- */
  --shadow-sm: 0 1px 3px rgba(16, 33, 64, 0.08), 0 1px 2px rgba(16, 33, 64, 0.06);
  --shadow-md: 0 8px 24px rgba(16, 33, 64, 0.10);
  --shadow-lg: 0 20px 48px rgba(16, 33, 64, 0.16);
  --shadow-xl: 0 32px 70px rgba(10, 26, 51, 0.22);

  /* ---- Radius ---- */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 30px;
  --r-pill: 999px;

  /* ---- Typography ---- */
  --font-head: 'Sora', 'Segoe UI', system-ui, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;

  /* ---- Layout ---- */
  --container: 1280px;
  --container-wide: 1480px;
  --gutter: clamp(1.1rem, 4vw, 2.5rem);
  --header-h: 84px;

  /* ---- Motion ---- */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.2s;
  --t: 0.4s;
  --t-slow: 0.7s;
}

/* --------------------------------- Reset --------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, picture, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; padding: 0; }
input, textarea, select { font: inherit; color: inherit; }

:focus-visible {
  outline: 3px solid var(--navy-400);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ------------------------------ Typography ------------------------------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.12;
  color: var(--brand-strong);
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.3rem, 5.2vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.8vw, 2.9rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.7rem); }
p { color: var(--text-soft); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}
.eyebrow::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.section-title { margin-bottom: 0.6rem; }
.section-lead { max-width: 60ch; color: var(--text-soft); font-size: 1.05rem; }

/* ------------------------------- Layout ---------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: var(--container-wide); }

.section {
  padding-block: clamp(3.5rem, 8vw, 7rem);
}
.section--alt { background: var(--bg-alt); }
.section--navy {
  background: var(--grad-navy);
  color: var(--white);
}
.section--navy h1, .section--navy h2, .section--navy h3 { color: var(--white); }
.section--navy p { color: rgba(255, 255, 255, 0.78); }

.section-head {
  max-width: 720px;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}
.section-head--center { margin-inline: auto; text-align: center; }

.grid { display: grid; gap: clamp(1.2rem, 2.5vw, 2rem); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ------------------------------- Buttons --------------------------------- */
.btn {
  --btn-bg: var(--navy-700);
  --btn-color: #fff;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.95rem 1.8rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  color: var(--btn-color);
  background: var(--btn-bg);
  border-radius: var(--r-pill);
  overflow: hidden;
  isolation: isolate;
  transition: transform var(--t-fast) var(--ease), box-shadow var(--t) var(--ease);
  box-shadow: var(--shadow-sm);
}
.btn svg { width: 18px; height: 18px; }
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(135deg, var(--navy-500), var(--navy-700));
  opacity: 0;
  transition: opacity var(--t) var(--ease);
}
.btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.btn:hover::before { opacity: 1; }
.btn:active { transform: translateY(-1px); }
/* Gloss sweep micro-animation */
.btn::after {
  content: '';
  position: absolute;
  top: 0; left: -130%;
  width: 55%; height: 100%;
  background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  pointer-events: none;
  transition: left 0.7s var(--ease);
}
.btn:hover::after { left: 150%; }

.btn--accent { --btn-bg: var(--grad-steel); --btn-color: var(--navy-900); }
.btn--accent::before { background: linear-gradient(135deg, #fff, #cfd6de); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  box-shadow: none;
}
.btn--ghost::before { background: rgba(255, 255, 255, 0.14); }

.btn--outline {
  --btn-bg: transparent;
  --btn-color: var(--navy-700);
  border: 1.5px solid var(--navy-700);
  box-shadow: none;
}
.btn--outline::before { background: var(--navy-700); }
.btn--outline:hover { --btn-color: #fff; }

.btn--lg { padding: 1.1rem 2.3rem; font-size: 1.02rem; }
.btn--block { width: 100%; }

/* ------------------------------- Cards ----------------------------------- */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease), border-color var(--t) var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(17, 48, 88, 0.16);
}

.glass {
  background: rgba(255, 255, 255, 0.10);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

/* --------------------- Image with graceful fallback ---------------------- */
/* Usage:
   <div class="media" data-label="Buttweld Elbow">
     <img src="/images/products/buttweld-elbow.webp" alt="Buttweld Elbow"
          loading="lazy" onerror="this.remove()">
   </div>
   If the image is missing/broken, a branded gradient + label shows instead. */
.media {
  position: relative;
  overflow: hidden;
  background: var(--grad-navy);
  display: grid;
  place-items: center;
  isolation: isolate;
}
.media::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(120% 100% at 20% 0%, rgba(59, 120, 196, 0.45), transparent 55%),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.04) 0 12px, transparent 12px 24px);
}
.media::after {
  content: attr(data-label);
  position: absolute;
  inset: auto 0 0 0;
  padding: 0.9rem 1rem;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.92);
  text-align: center;
  z-index: 0;
}
.media img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease);
}
.media:hover img { transform: scale(1.06); }

/* ---------------------- Spotlight (cursor glow) -------------------------- */
[data-spotlight] { position: relative; overflow: hidden; }
[data-spotlight]::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(157, 196, 240, 0.22), transparent 60%);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
  z-index: 1;
  mix-blend-mode: screen;
}
[data-spotlight]:hover::after { opacity: 1; }

/* --------------------------- 3D tilt cards ------------------------------- */
[data-tilt] { transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease); will-change: transform; }

/* ------------------------------ Utilities -------------------------------- */
.text-center { text-align: center; }
.text-gradient {
  background: var(--grad-navy);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2.5rem; }
.flex { display: flex; } .items-center { align-items: center; } .gap-1 { gap: 0.75rem; }
.wrap { flex-wrap: wrap; }
.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;
}

/* --------------------------- Scroll reveal ------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal-delay="3"] { transition-delay: 0.24s; }
[data-reveal-delay="4"] { transition-delay: 0.32s; }
[data-reveal-delay="5"] { transition-delay: 0.40s; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ----------------------------- Responsive -------------------------------- */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  :root { --header-h: 70px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .btn { padding: 0.85rem 1.5rem; }
}