/* ============================================================
   HEAVY DUTY PARTS — DESIGN SYSTEM v1.0
   Tokens + components. Used to style this spec document itself,
   so the page demonstrates the system it describes.
   ============================================================ */

/* ---------- 1. TOKENS ---------- */
:root{
  /* Core neutrals — warm-cool steel, never pure */
  --ink:        #0B0B0C;   /* near-black, primary text on light, hero base */
  --charcoal:   #161719;   /* panel black */
  --steel-900:  #212327;   /* raised dark surface */
  --steel-700:  #34373D;   /* borders on dark, secondary dark fill */
  --steel-500:  #6A6F77;   /* mid steel grey — captions, muted text */
  --steel-300:  #A8ADB4;   /* disabled, faint UI */
  --steel-150:  #D7DADE;   /* hairlines on light */
  --steel-075:  #ECEEF0;   /* light fill / track */
  --paper:      #F4F2EC;   /* warm off-white page */
  --white:      #FFFFFF;

  /* Brand — HDP safety yellow (pulled from live site) */
  --yellow:      #FCBB20;  /* primary accent */
  --yellow-deep: #E2A200;  /* hover / pressed */
  --yellow-dark: #B98300;  /* text-on-light yellow that passes contrast */
  --yellow-tint: #FFF3D2;  /* subtle wash on light */
  --yellow-glow: rgba(252,187,32,.16);

  /* Functional */
  --whatsapp:   #25D366;   /* WhatsApp — used sparingly, real brand color */
  --whatsapp-d: #1EB155;
  --positive:   #2FA66A;
  --danger:     #CC2B2B;

  /* Metallic gradients */
  --steel-grad:  linear-gradient(150deg,#34373D 0%,#212327 48%,#161719 100%);
  --steel-sheen: linear-gradient(115deg,#3d4047 0%,#26282d 40%,#1a1b1e 100%);
  --yellow-grad: linear-gradient(160deg,#FFD24D 0%,#FCBB20 55%,#E2A200 100%);

  /* Type */
  --display: "Saira Condensed", "Arial Narrow", sans-serif;
  --body: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;

  /* Radius — tight & engineered, never pill-soft on structure */
  --r-xs: 3px;
  --r-sm: 5px;
  --r-md: 8px;
  --r-lg: 12px;

  /* Elevation */
  --sh-sm: 0 1px 2px rgba(11,11,12,.08), 0 2px 6px rgba(11,11,12,.06);
  --sh-md: 0 4px 10px rgba(11,11,12,.10), 0 14px 30px rgba(11,11,12,.10);
  --sh-lg: 0 10px 24px rgba(11,11,12,.16), 0 30px 60px rgba(11,11,12,.18);
  --sh-yellow: 0 8px 22px rgba(252,187,32,.34);

  /* Spacing base — 8px grid */
  --s1: 4px;  --s2: 8px;  --s3: 12px; --s4: 16px; --s5: 24px;
  --s6: 32px; --s7: 48px; --s8: 64px; --s9: 96px; --s10: 128px;

  /* Layout */
  --container: 1240px;
  --gutter: 24px;
}

/* ---------- 2. RESET / BASE ---------- */
*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ max-width:100%; display:block; }
a{ color:inherit; }

/* ---------- 3. TYPE SCALE ---------- */
.display, h1.hd, h2.hd, h3.hd{
  font-family:var(--display);
  font-weight:700;
  text-transform:uppercase;
  line-height:.92;
  letter-spacing:-.01em;
  margin:0;
}
.t-display{ font-size:clamp(56px,8vw,104px); letter-spacing:-.02em; }
.t-h1{ font-size:clamp(40px,5vw,68px); }
.t-h2{ font-size:clamp(30px,3.6vw,46px); }
.t-h3{ font-size:clamp(22px,2.4vw,30px); }
.t-h4{ font-family:var(--display); font-weight:600; text-transform:uppercase; font-size:19px; letter-spacing:.005em; line-height:1.05; margin:0; }

.eyebrow{
  font-family:var(--mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.22em;
  text-transform:uppercase;
  color:var(--yellow-dark);
  display:inline-flex; align-items:center; gap:8px;
}
.eyebrow::before{ content:""; width:22px; height:2px; background:var(--yellow); display:inline-block; }
.eyebrow.on-dark{ color:var(--yellow); }

.lead{ font-size:19px; line-height:1.55; color:var(--steel-700); }
.body{ font-size:16px; }
.small{ font-size:14px; }
.cap{ font-size:12.5px; color:var(--steel-500); }
.mono{ font-family:var(--mono); }
.sku{ font-family:var(--mono); font-size:12.5px; letter-spacing:.04em; color:var(--steel-500); text-transform:uppercase; }

/* ---------- 4. BUTTONS / CTA HIERARCHY ---------- */
.btn{
  font-family:var(--display);
  font-weight:600;
  text-transform:uppercase;
  letter-spacing:.03em;
  font-size:16px;
  line-height:1;
  display:inline-flex; align-items:center; gap:10px;
  padding:15px 26px;
  border:1.5px solid transparent;
  border-radius:var(--r-sm);
  cursor:pointer;
  text-decoration:none;
  transition:transform .14s ease, box-shadow .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn svg{ width:18px; height:18px; flex:none; }
.btn:active{ transform:translateY(1px); }

/* Primary — the money button. Yellow, used once or twice per view. */
.btn-primary{ background:var(--yellow); color:var(--ink); box-shadow:var(--sh-sm); }
.btn-primary:hover{ background:var(--yellow-deep); box-shadow:var(--sh-yellow); transform:translateY(-1px); }

/* Secondary — outline, adapts to surface */
.btn-outline{ background:transparent; color:var(--ink); border-color:var(--ink); }
.btn-outline:hover{ background:var(--ink); color:var(--white); }
.on-dark .btn-outline, .btn-outline.on-dark{ color:var(--white); border-color:rgba(255,255,255,.55); }
.on-dark .btn-outline:hover, .btn-outline.on-dark:hover{ background:var(--white); color:var(--ink); border-color:var(--white); }

/* WhatsApp — functional green, secondary action */
.btn-wa{ background:var(--whatsapp); color:#06351a; }
.btn-wa:hover{ background:var(--whatsapp-d); color:#fff; transform:translateY(-1px); }

/* Ghost / tertiary text link */
.btn-ghost{ background:transparent; padding:8px 4px; border:none; color:var(--ink); }
.btn-ghost:hover{ color:var(--yellow-dark); }
.on-dark .btn-ghost{ color:var(--white); }

.btn-sm{ padding:10px 16px; font-size:14px; }
.btn-lg{ padding:18px 32px; font-size:18px; }
.btn-block{ display:flex; width:100%; justify-content:center; }

/* Arrow link */
.arrow-link{
  font-family:var(--display); font-weight:600; text-transform:uppercase;
  letter-spacing:.04em; font-size:14px; color:var(--ink);
  display:inline-flex; align-items:center; gap:8px; text-decoration:none;
}
.arrow-link .ln{ width:18px; height:2px; background:var(--yellow); transition:width .18s ease; }
.arrow-link:hover .ln{ width:30px; }

/* ---------- 5. SEARCH / FORM INPUTS ---------- */
.field{
  display:flex; align-items:center; gap:12px;
  background:var(--white);
  border:1.5px solid var(--steel-150);
  border-radius:var(--r-sm);
  padding:0 16px;
  height:54px;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.field:focus-within{ border-color:var(--yellow); box-shadow:0 0 0 3px var(--yellow-glow); }
.field input{ border:none; outline:none; background:none; font-family:var(--body); font-size:16px; width:100%; color:var(--ink); }
.field input::placeholder{ color:var(--steel-300); }
.field .ico{ color:var(--steel-500); flex:none; }

/* Hero parts search — the headline input */
.parts-search{
  display:flex; gap:0;
  background:var(--white);
  border-radius:var(--r-md);
  box-shadow:var(--sh-lg);
  overflow:hidden;
  border:1px solid rgba(0,0,0,.06);
}
.parts-search .ps-field{ display:flex; align-items:center; gap:14px; flex:1; padding:0 22px; height:68px; }
.parts-search .ps-field svg{ color:var(--steel-500); flex:none; }
.parts-search input{ border:none; outline:none; font-family:var(--body); font-size:18px; width:100%; }
.parts-search input::placeholder{ color:var(--steel-300); }
.parts-search .btn-primary{ border-radius:0; padding-inline:30px; }

.label{ font-family:var(--mono); font-size:11px; letter-spacing:.16em; text-transform:uppercase; color:var(--steel-500); display:block; margin-bottom:8px; }

/* ---------- 6. CARDS ---------- */
.card{ background:var(--white); border:1px solid var(--steel-150); border-radius:var(--r-md); overflow:hidden; }

/* Category card */
.cat-card{
  background:var(--white); border:1px solid var(--steel-150); border-radius:var(--r-md);
  overflow:hidden; text-decoration:none; color:var(--ink); display:flex; flex-direction:column;
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.cat-card:hover{ transform:translateY(-4px); box-shadow:var(--sh-md); border-color:var(--steel-300); }
.cat-card .thumb{ aspect-ratio:4/3; position:relative; overflow:hidden; }
.cat-card .thumb img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
.cat-card:hover .thumb img{ transform:scale(1.05); }
.cat-card .body{ padding:18px 18px 20px; display:flex; flex-direction:column; gap:6px; }
.cat-card .count{ position:absolute; top:12px; left:12px; background:var(--ink); color:#fff; font-family:var(--mono); font-size:11px; letter-spacing:.05em; padding:5px 9px; border-radius:var(--r-xs); }
.cat-card .row{ display:flex; align-items:center; justify-content:space-between; margin-top:6px; }

/* Product / quote tile */
.prod-tile{
  background:var(--white); border:1px solid var(--steel-150); border-radius:var(--r-md);
  overflow:hidden; display:flex; flex-direction:column; transition:transform .2s ease, box-shadow .2s ease;
}
.prod-tile:hover{ transform:translateY(-3px); box-shadow:var(--sh-md); }
.prod-tile .thumb{ aspect-ratio:1/1; background:var(--steel-075); }
.prod-tile .body{ padding:16px; display:flex; flex-direction:column; gap:10px; }

/* Stat card */
.stat{ border-left:3px solid var(--yellow); padding:4px 0 4px 18px; }
.stat .n{ font-family:var(--display); font-weight:700; font-size:54px; line-height:.9; }
.stat .l{ font-family:var(--mono); font-size:12px; letter-spacing:.12em; text-transform:uppercase; color:var(--steel-500); }

/* Help / action card */
.help-card{
  background:var(--white); border:1px solid var(--steel-150); border-radius:var(--r-md);
  padding:26px; display:flex; flex-direction:column; gap:14px; text-decoration:none; color:var(--ink);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s;
  position:relative;
}
.help-card:hover{ transform:translateY(-4px); box-shadow:var(--sh-md); border-color:var(--yellow); }
.help-card .ic{ width:48px; height:48px; border-radius:var(--r-sm); display:grid; place-items:center; background:var(--ink); color:var(--yellow); }
.help-card:hover .ic{ background:var(--yellow); color:var(--ink); }

/* Testimonial */
.quote-card{ background:var(--white); border:1px solid var(--steel-150); border-top:3px solid var(--yellow); border-radius:var(--r-md); padding:26px; }
.stars{ color:var(--yellow); letter-spacing:2px; font-size:15px; }

/* ---------- 7. IMAGE TREATMENT / PLACEHOLDER SLOTS ---------- */
.imgslot{
  position:relative;
  background:
    repeating-linear-gradient(135deg,#e7e4dc 0 14px,#efece5 14px 28px);
  border:1px dashed var(--steel-300);
  border-radius:var(--r-sm);
  display:flex; align-items:flex-end;
  overflow:hidden; color:var(--steel-700);
  min-height:120px;
}
.imgslot.dark{
  background:repeating-linear-gradient(135deg,#1d1f22 0 14px,#232529 14px 28px);
  border-color:var(--steel-700); color:var(--steel-300);
}
.imgslot .meta{ font-family:var(--mono); font-size:11px; line-height:1.4; padding:10px 12px; background:rgba(0,0,0,.04); backdrop-filter:blur(2px); width:100%; }
.imgslot.dark .meta{ background:rgba(0,0,0,.35); }
.imgslot .tag{ position:absolute; top:10px; left:10px; font-family:var(--mono); font-size:10px; letter-spacing:.12em; text-transform:uppercase; background:var(--yellow); color:var(--ink); padding:4px 7px; border-radius:var(--r-xs); }

/* Duotone treatment demo */
.duo{ position:relative; }
.duo::after{ content:""; position:absolute; inset:0; background:linear-gradient(180deg,rgba(11,11,12,0) 40%,rgba(11,11,12,.78) 100%); }
.duo .cap-over{ position:absolute; left:16px; bottom:14px; z-index:2; color:#fff; }

/* ---------- 8. ICON SWATCH ---------- */
.ico-line{ stroke:currentColor; stroke-width:1.6; fill:none; stroke-linecap:round; stroke-linejoin:round; }

/* ---------- 9. UTILITY ---------- */
.on-dark{ color:var(--white); }
.hz{ background:repeating-linear-gradient(45deg,var(--yellow) 0 14px,var(--ink) 14px 28px); }
.blueprint{
  background-color:var(--ink);
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:34px 34px;
}
.tagchip{
  font-family:var(--mono); font-size:11px; letter-spacing:.06em; text-transform:uppercase;
  border:1px solid var(--steel-150); border-radius:100px; padding:5px 11px; color:var(--steel-700);
  background:var(--white); display:inline-flex; align-items:center; gap:6px;
}
.tagchip .dot{ width:7px; height:7px; border-radius:50%; background:var(--yellow); }

/* ---------- 10. LOGO LOCKUP ---------- */
.logo-lockup{ display:inline-flex; align-items:center; gap:14px; }
.logo-badge{ width:54px; height:54px; border-radius:var(--r-sm); background:var(--yellow); display:grid; place-items:center; font-family:var(--display); font-weight:800; font-size:22px; color:var(--ink); letter-spacing:-.02em; flex:none; }
.logo-word{ display:flex; flex-direction:column; gap:2px; line-height:.92; }
.logo-word .l1{ font-family:var(--display); font-weight:800; font-size:28px; letter-spacing:-.01em; text-transform:uppercase; line-height:1; color:var(--ink); }
.logo-word .l2{ font-family:var(--display); font-weight:600; font-size:13px; letter-spacing:.42em; text-transform:uppercase; color:var(--steel-500); padding-left:2px; line-height:1; }
.logo-word .l1 .pro{ color:var(--yellow-dark); font-size:13px; vertical-align:super; letter-spacing:.1em; }
.on-dark .logo-word .l1{ color:#fff; }
.on-dark .logo-word .l2{ color:var(--steel-300); }
.on-dark .logo-word .l1 .pro{ color:var(--yellow); }

/* ---------- 11. PLACEHOLDER (styled image slot w/ generation brief) ---------- */
.ph{ position:relative; display:flex; align-items:center; justify-content:center; text-align:center; overflow:hidden;
  background:repeating-linear-gradient(135deg,#e7e4dc 0 16px,#efece5 16px 32px); color:var(--steel-500); }
.ph.dark{ background:repeating-linear-gradient(135deg,#1b1d20 0 16px,#212327 16px 32px); color:var(--steel-300); }
.ph .ph-in{ padding:18px; max-width:92%; display:flex; flex-direction:column; align-items:center; gap:6px; }
.ph .ph-in svg{ width:26px; height:26px; opacity:.5; }
.ph .ph-in .lab{ font-family:var(--display); font-weight:600; text-transform:uppercase; letter-spacing:.03em; font-size:15px; color:inherit; }
.ph .ph-in .br{ font-family:var(--mono); font-size:11px; line-height:1.45; opacity:.85; }
.ph .tag{ position:absolute; top:10px; left:10px; font-family:var(--mono); font-size:10px; letter-spacing:.12em; text-transform:uppercase; background:var(--yellow); color:var(--ink); padding:4px 7px; border-radius:var(--r-xs); }