/* Google Fonts: add <link rel="preconnect" href="https://fonts.googleapis.com"> to <head> before CSS */
/* ============================================================
   STEELDATA PLATFORM — DESIGN SYSTEM
   Dark Industrial UI · Safety Orange · Barlow Condensed
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:wght@500;600;700;800&family=Barlow:wght@400;500;600&family=DM+Sans:ital,wght@0,400;0,500;0,600;1,400&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── TOKENS ─────────────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg:          #080F1A;
  --bg-surface:  #0D1826;
  --bg-card:     #101F32;
  --bg-card-2:   #132540;
  --bg-input:    #0A1422;
  --bg-hover:    #162E48;

  /* Borders */
  --border:      #1A2E45;
  --border-md:   #213855;
  --border-lt:   #2D4F70;

  /* Accent – Safety Orange */
  --orange:      #E8721A;
  --orange-dk:   #C85F0F;
  --orange-lt:   #F08A38;
  --orange-glow: rgba(232,114,26,.12);
  --orange-ring: rgba(232,114,26,.35);

  /* Amber */
  --amber:       #D4970E;
  --amber-lt:    #F0B020;

  /* Steel tones */
  --steel:       #3B5E80;
  --steel-lt:    #4A7AA0;

  /* Text */
  --tx:          #D8E8F4;
  --tx-1:        #E8F0F8;
  --tx-2:        #8AA4BE;
  --tx-3:        #506A85;
  --tx-inv:      #080F1A;

  /* Status */
  --green:       #22C55E;
  --green-bg:    rgba(34,197,94,.1);
  --red:         #EF4444;
  --red-bg:      rgba(239,68,68,.1);
  --yellow:      #F59E0B;
  --yellow-bg:   rgba(245,158,11,.1);

  /* Typography */
  --fh:  'Barlow Condensed', sans-serif;  /* headings */
  --fb:  'DM Sans', sans-serif;           /* body */
  --fm:  'JetBrains Mono', monospace;     /* mono / data */
  --fb2: 'Barlow', sans-serif;            /* sub-headings */

  /* Spacing & sizing */
  --nav-h:   64px;
  --r:        6px;
  --r-lg:    10px;
  --r-xl:    14px;

  /* Shadows */
  --sh-card:  0 1px 3px rgba(0,0,0,.5), 0 6px 20px rgba(0,0,0,.4);
  --sh-hover: 0 12px 40px rgba(0,0,0,.6), 0 2px 8px rgba(0,0,0,.4);
  --sh-orange:0 4px 24px rgba(232,114,26,.25);

  /* Transitions */
  --t: .18s ease;
}

/* ── LIGHT THEME ────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:          #F4F7FB;
  --bg-surface:  #EBF0F7;
  --bg-card:     #FFFFFF;
  --bg-card-2:   #F0F4F9;
  --bg-input:    #FFFFFF;
  --bg-hover:    #E5EDF6;
  --border:      #D1DCE8;
  --border-md:   #BCC9D8;
  --border-lt:   #A8BBCC;
  --orange:      #D4611A;
  --orange-dk:   #B85215;
  --orange-lt:   #E8721A;
  --orange-glow: rgba(212,97,26,.1);
  --orange-ring: rgba(212,97,26,.3);
  --steel:       #5B82A8;
  --steel-lt:    #3B6590;
  --tx:          #0E1C2D;
  --tx-1:        #0E1C2D;
  --tx-2:        #3A5572;
  --tx-3:        #6A87A0;
  --tx-inv:      #FFFFFF;
  --sh-card:     0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --sh-hover:    0 8px 32px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
  --sh-orange:   0 4px 20px rgba(212,97,26,.2);
}
[data-theme="light"] .navbar {
  background: rgba(244,247,251,.96);
}
[data-theme="light"] .page-header {
  background: linear-gradient(135deg, #EBF0F7 0%, #DDE6F2 100%);
}

/* ── THEME TOGGLE BUTTON ─────────────────────────────────────── */
.theme-toggle {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--tx-2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; cursor: pointer;
  transition: all var(--t);
  flex-shrink: 0;
  margin-left: 8px;
}
.theme-toggle:hover {
  border-color: var(--orange);
  color: var(--orange);
  background: var(--orange-glow);
}

/* ── FAVORITE BUTTON ─────────────────────────────────────────── */
.fav-btn {
  position: absolute; top: 10px; right: 10px;
  width: 28px; height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card-2);
  color: var(--tx-3);
  display: flex; align-items: center; justify-content: center;
  font-size: .85rem; cursor: pointer;
  transition: all var(--t);
  z-index: 2;
  flex-shrink: 0;
  line-height: 1;
}
.fav-btn:hover { border-color: var(--orange); color: var(--orange); background: var(--orange-glow); }
.fav-btn.active { color: var(--orange); border-color: var(--orange); background: var(--orange-glow); }
.product-card { position: relative; }

/* ── FILTER CHIPS ────────────────────────────────────────────── */
.filter-chips {
  display: flex; gap: 6px; flex-wrap: wrap; align-items: center;
}
.filter-chip {
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--tx-2);
  font-size: .75rem; font-weight: 600;
  font-family: var(--fm);
  cursor: pointer;
  transition: all var(--t);
  white-space: nowrap;
}
.filter-chip:hover { border-color: var(--orange); color: var(--orange); }
.filter-chip.active { border-color: var(--orange); background: var(--orange-glow); color: var(--orange); }

/* ── RECENTLY VIEWED WIDGET ──────────────────────────────────── */
.recent-widget {
  margin-top: 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.recent-widget-header {
  background: var(--bg-card-2);
  border-bottom: 1px solid var(--border);
  padding: 10px 14px;
  font-size: .68rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--tx-3);
  display: flex; justify-content: space-between; align-items: center;
}
.recent-widget-clear {
  background: none; border: none; color: var(--tx-3); font-size: .68rem;
  cursor: pointer; text-decoration: underline;
}
.recent-widget-clear:hover { color: var(--orange); }
.recent-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 14px; border-bottom: 1px solid var(--border);
  font-size: .8rem; color: var(--tx-2);
  text-decoration: none; transition: background var(--t);
}
.recent-item:last-child { border-bottom: none; }
.recent-item:hover { background: var(--bg-hover); color: var(--tx); }
.recent-item-svg { width: 22px; height: 22px; flex-shrink: 0; }
.recent-item-cat { font-size: .68rem; color: var(--tx-3); }
.recent-empty {
  padding: 12px 14px;
  font-size: .78rem; color: var(--tx-3); font-style: italic;
}

/* ── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
  font-family: var(--fb);
  background: var(--bg);
  color: var(--tx);
  line-height: 1.65;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--orange); text-decoration: none; transition: color var(--t); }
a:hover { color: var(--orange-lt); }
button { cursor: pointer; }
input, select, textarea {
  font-family: var(--fb);
  color: var(--tx);
  background: var(--bg-input);
}
h1,h2,h3,h4,h5 { font-family: var(--fh); line-height: 1.1; letter-spacing: .3px; }

/* ── NAVBAR ─────────────────────────────────────────────────── */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: rgba(8,15,26,.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  display: flex; align-items: center;
}
.nav-inner {
  width: 100%; max-width: 1280px;
  margin: 0 auto; padding: 0 28px;
  display: flex; align-items: center; gap: 0;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--fh);
  font-size: 1.35rem; font-weight: 800;
  color: var(--tx); letter-spacing: .5px;
  flex-shrink: 0;
  text-decoration: none;
}
.nav-logo:hover { color: var(--tx); }
.nav-logo-mark {
  width: 34px; height: 34px;
  background: var(--orange);
  border-radius: var(--r);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.nav-logo-mark svg { width: 18px; height: 18px; fill: #fff; }
.nav-logo span { color: var(--orange); }

.nav-links {
  display: flex; align-items: center; gap: 2px;
  list-style: none; margin-left: auto;
}
.nav-links a {
  color: var(--tx-2); font-family: var(--fb2);
  font-size: .88rem; font-weight: 500;
  padding: 6px 13px; border-radius: var(--r);
  transition: all var(--t); white-space: nowrap;
  text-decoration: none;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--tx); background: var(--bg-hover);
}
.nav-links a.cta {
  background: var(--orange); color: #fff; font-weight: 600;
  margin-left: 8px;
}
.nav-links a.cta:hover { background: var(--orange-lt); color: #fff; }

.nav-divider { width: 1px; height: 20px; background: var(--border); margin: 0 8px; list-style: none; align-self: center; }

.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; padding: 6px; margin-left: auto;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--tx-2); border-radius: 2px; transition: all .25s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: none; position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px 24px; z-index: 999;
}
.nav-mobile.open { display: block; }
.nav-mobile a {
  display: block; color: var(--tx-2);
  padding: 11px 0; font-size: 1rem;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a.cta-mob {
  margin-top: 12px; padding: 11px 18px;
  background: var(--orange); color: #fff;
  border-radius: var(--r); text-align: center;
  font-weight: 600; border-bottom: none;
}

/* ── SKIP LINK ───────────────────────────────────────────────── */
.skip-link {
  position: absolute; top: -100%; left: 8px; z-index: 9999;
  background: var(--orange); color: #fff; font-size: .9rem;
  padding: 8px 16px; border-radius: var(--r); text-decoration: none;
  font-weight: 600; transition: top .15s;
}
.skip-link:focus { top: 8px; }

/* ── PAGE WRAPPER ────────────────────────────────────────────── */
.page { padding-top: var(--nav-h); }

/* ── CONTAINER ───────────────────────────────────────────────── */
.container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
.container-sm { max-width: 900px; margin: 0 auto; padding: 0 28px; }
.container-md { max-width: 1100px; margin: 0 auto; padding: 0 28px; }

/* ── SECTION SPACING ─────────────────────────────────────────── */
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.section-lg { padding: 96px 0; }

/* ── SECTION LABEL ───────────────────────────────────────────── */
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--fm); font-size: .72rem; font-weight: 500;
  letter-spacing: 1.5px; text-transform: uppercase;
  color: var(--orange); margin-bottom: 14px;
}
.section-label::before {
  content: ''; display: block;
  width: 16px; height: 2px; background: var(--orange);
}

/* ── HEADINGS ────────────────────────────────────────────────── */
.h-display {
  font-family: var(--fh); font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 800; line-height: 1.05; color: var(--tx);
  letter-spacing: -.5px;
}
.h-1 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); font-weight: 700; }
.h-2 { font-size: clamp(1.4rem, 2.5vw, 2rem); font-weight: 700; }
.h-3 { font-size: 1.25rem; font-weight: 700; }
.h-accent { color: var(--orange); }
.h-dim { color: var(--tx-2); font-weight: 500; }

.lead {
  font-size: 1.05rem; color: var(--tx-2); line-height: 1.7;
  max-width: 640px;
}

/* ── BUTTONS ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--fb2); font-weight: 600;
  font-size: .92rem; padding: 10px 22px;
  border-radius: var(--r); border: none;
  cursor: pointer; transition: all var(--t);
  text-decoration: none; white-space: nowrap;
  letter-spacing: .2px;
}
.btn-primary {
  background: var(--orange); color: #fff;
}
.btn-primary:hover {
  background: var(--orange-lt); color: #fff;
  box-shadow: var(--sh-orange);
  transform: translateY(-1px);
}
.btn-secondary {
  background: transparent; color: var(--tx-2);
  border: 1px solid var(--border-md);
}
.btn-secondary:hover {
  background: var(--bg-hover); color: var(--tx);
  border-color: var(--border-lt);
}
.btn-ghost {
  background: transparent; color: var(--orange);
  border: 1px solid var(--orange-ring);
}
.btn-ghost:hover {
  background: var(--orange-glow); color: var(--orange-lt);
}
.btn-lg { padding: 13px 28px; font-size: 1rem; }
.btn-sm { padding: 7px 14px; font-size: .83rem; }
.btn-icon { padding: 9px; }

/* ── CARDS ───────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-card);
  transition: all var(--t);
}
.card:hover {
  border-color: var(--border-md);
  box-shadow: var(--sh-hover);
  transform: translateY(-2px);
}
.card-link { display: block; text-decoration: none; color: inherit; }
.card-link:hover { color: inherit; }
.card-body { padding: 24px; }
.card-sm .card-body { padding: 18px; }
.card-lg .card-body { padding: 32px; }

/* ── BADGE ───────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center;
  font-family: var(--fm); font-size: .72rem; font-weight: 500;
  letter-spacing: .5px; text-transform: uppercase;
  padding: 3px 9px; border-radius: 4px;
}
.badge-orange { background: var(--orange-glow); color: var(--orange); border: 1px solid var(--orange-ring); }
.badge-steel  { background: rgba(59,94,128,.15); color: var(--steel-lt); border: 1px solid rgba(59,94,128,.3); }
.badge-green  { background: var(--green-bg); color: var(--green); border: 1px solid rgba(34,197,94,.25); }
.badge-amber  { background: var(--yellow-bg); color: var(--yellow); border: 1px solid rgba(245,158,11,.3); }

/* ── DIVIDER ─────────────────────────────────────────────────── */
.divider { border: none; border-top: 1px solid var(--border); }

/* ── FORM ELEMENTS ───────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-label {
  font-family: var(--fm); font-size: .75rem; font-weight: 500;
  letter-spacing: .8px; text-transform: uppercase; color: var(--tx-3);
}
.form-input, .form-select, .form-textarea {
  background: var(--bg-input);
  border: 1px solid var(--border-md);
  border-radius: var(--r);
  padding: 10px 14px;
  color: var(--tx);
  font-size: .92rem;
  outline: none;
  transition: border-color var(--t);
  width: 100%;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px var(--orange-glow);
}
.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23506A85' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 34px;
}
.form-textarea { resize: vertical; min-height: 110px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid.col-3 { grid-template-columns: repeat(3, 1fr); }
.form-full { grid-column: 1 / -1; }
.form-error { font-size: .8rem; color: var(--red); display: none; }
.form-error.show { display: block; }
.form-hint { font-size: .8rem; color: var(--tx-3); }

/* ── DATA TABLE ──────────────────────────────────────────────── */
.data-table-wrap { overflow-x: auto; border-radius: var(--r-lg); border: 1px solid var(--border); }
.data-table {
  width: 100%; border-collapse: collapse;
  font-size: .88rem;
}
.data-table thead { background: var(--bg-card-2); }
.data-table th {
  font-family: var(--fm); font-size: .72rem; font-weight: 500;
  letter-spacing: 1px; text-transform: uppercase; color: var(--tx-3);
  padding: 12px 16px; text-align: left;
  border-bottom: 1px solid var(--border-md);
}
.data-table td {
  padding: 11px 16px; border-bottom: 1px solid var(--border);
  color: var(--tx-2); vertical-align: middle;
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--bg-hover); color: var(--tx); }
.data-table .td-name { font-family: var(--fm); font-weight: 500; color: var(--tx); }
.data-table .td-val  { font-family: var(--fm); }

/* ── RESULT BOX ──────────────────────────────────────────────── */
.result-box {
  background: var(--bg-card-2);
  border: 1px solid var(--border-md);
  border-radius: var(--r-lg);
  padding: 28px;
}
.result-box.success { border-color: rgba(34,197,94,.3); }
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.result-item {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 16px;
}
.result-value {
  font-family: var(--fm); font-size: 1.5rem; font-weight: 600;
  color: var(--orange); line-height: 1.2;
}
.result-unit { font-size: .8rem; color: var(--tx-3); margin-top: 2px; }
.result-label { font-family: var(--fm); font-size: .72rem; letter-spacing: .8px;
  text-transform: uppercase; color: var(--tx-3); margin-top: 8px; }

/* ── HERO ────────────────────────────────────────────────────── */
.hero {
  position: relative; overflow: hidden;
  padding: 100px 0 80px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(232,114,26,.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(30,56,100,.4) 0%, transparent 60%);
  pointer-events: none;
}
.hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: .25;
}
.hero-content { position: relative; z-index: 1; }

/* ── STAT STRIP ──────────────────────────────────────────────── */
.stat-strip {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 28px 0;
}
.stat-strip-inner {
  display: flex; justify-content: space-between;
  align-items: center; gap: 32px; flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-value {
  font-family: var(--fh); font-size: 2rem; font-weight: 800;
  color: var(--orange); line-height: 1;
}
.stat-label { font-size: .82rem; color: var(--tx-3); margin-top: 4px; }

/* ── FEATURE GRID ────────────────────────────────────────────── */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: all var(--t);
}
.feature-card:hover {
  border-color: var(--orange-ring);
  box-shadow: 0 0 0 1px var(--orange-ring), var(--sh-hover);
}
.feature-icon {
  width: 44px; height: 44px;
  background: var(--orange-glow);
  border: 1px solid var(--orange-ring);
  border-radius: var(--r);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; font-size: 1.2rem;
}
.feature-title {
  font-family: var(--fh); font-size: 1.15rem; font-weight: 700;
  color: var(--tx); margin-bottom: 8px;
}
.feature-desc { font-size: .88rem; color: var(--tx-2); line-height: 1.65; }

/* ── CATEGORY CARD ───────────────────────────────────────────── */
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: all var(--t);
  text-decoration: none; color: inherit; display: block;
}
.cat-card:hover { border-color: var(--orange-ring); transform: translateY(-3px); box-shadow: var(--sh-hover); color: inherit; }
.cat-card-top {
  background: var(--bg-card-2);
  padding: 28px;
  display: flex; align-items: center; justify-content: center;
  min-height: 120px; position: relative;
  border-bottom: 1px solid var(--border);
}
.cat-svg { width: 64px; height: 64px; opacity: .85; }
.cat-card-body { padding: 18px 20px; }
.cat-card-name {
  font-family: var(--fh); font-size: 1.1rem; font-weight: 700;
  color: var(--tx); margin-bottom: 4px;
}
.cat-card-count { font-family: var(--fm); font-size: .78rem; color: var(--tx-3); }
.cat-card-arrow {
  margin-left: auto; color: var(--orange);
  font-size: 1rem; transition: transform var(--t);
}
.cat-card:hover .cat-card-arrow { transform: translateX(4px); }

/* ── TOOL CARD ───────────────────────────────────────────────── */
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  display: block; text-decoration: none; color: inherit;
  transition: all var(--t); position: relative; overflow: hidden;
}
.tool-card::after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0;
  height: 2px; background: var(--orange);
  transform: scaleX(0); transition: transform var(--t);
  transform-origin: left;
}
.tool-card:hover { border-color: var(--border-md); box-shadow: var(--sh-hover); color: inherit; }
.tool-card:hover::after { transform: scaleX(1); }
.tool-card-icon {
  width: 48px; height: 48px;
  background: var(--orange-glow);
  border: 1px solid var(--orange-ring);
  border-radius: var(--r);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; margin-bottom: 20px;
}
.tool-card-title {
  font-family: var(--fh); font-size: 1.3rem; font-weight: 700;
  color: var(--tx); margin-bottom: 8px;
}
.tool-card-desc { font-size: .88rem; color: var(--tx-2); line-height: 1.65; }
.tool-card-cta {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--fm); font-size: .8rem; font-weight: 500;
  color: var(--orange); margin-top: 20px; letter-spacing: .5px;
}

/* ── FILTER BAR ──────────────────────────────────────────────── */
.filter-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 18px 22px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.filter-bar .form-select, .filter-bar .form-input {
  min-width: 160px; flex: 1;
}
.filter-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--bg-card-2); border: 1px solid var(--border-md);
  border-radius: 4px; padding: 4px 10px;
  font-size: .8rem; color: var(--tx-2); cursor: pointer;
  transition: all var(--t);
}
.filter-tag.active { background: var(--orange-glow); border-color: var(--orange-ring); color: var(--orange); }
.filter-tag:hover { border-color: var(--border-lt); color: var(--tx); }

/* ── PRODUCT GRID ────────────────────────────────────────────── */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  transition: all var(--t);
  text-decoration: none; color: inherit; display: block;
  overflow: hidden;
}
.product-card:hover { border-color: var(--orange-ring); transform: translateY(-2px); box-shadow: var(--sh-hover); color: inherit; }
.product-card-top {
  background: var(--bg-card-2); padding: 24px;
  display: flex; flex-direction: column; gap: 12px;
  border-bottom: 1px solid var(--border);
}
.product-card-name {
  font-family: var(--fh); font-size: 1.25rem; font-weight: 700; color: var(--tx);
}
.product-card-props {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
}
.product-prop {
  display: flex; flex-direction: column; gap: 2px;
}
.product-prop-label { font-family: var(--fm); font-size: .68rem; color: var(--tx-3); text-transform: uppercase; letter-spacing: .8px; }
.product-prop-val { font-family: var(--fm); font-size: .92rem; color: var(--tx-2); font-weight: 500; }
.product-card-body { padding: 16px 20px; display: flex; align-items: center; justify-content: space-between; }
.product-card-type { font-size: .82rem; color: var(--tx-3); }
.product-card-arrow { color: var(--orange); font-size: 1rem; transition: transform var(--t); }
.product-card:hover .product-card-arrow { transform: translateX(4px); }

/* ── DETAIL PAGE ─────────────────────────────────────────────── */
.detail-layout { display: grid; grid-template-columns: 1fr 360px; gap: 32px; align-items: start; }
.detail-props-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 24px 0; }
.detail-prop {
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: var(--r); padding: 16px;
}
.detail-prop-label { font-family: var(--fm); font-size: .7rem; letter-spacing: .8px; text-transform: uppercase; color: var(--tx-3); margin-bottom: 6px; }
.detail-prop-val { font-family: var(--fm); font-size: 1.15rem; font-weight: 600; color: var(--tx); }
.detail-prop-unit { font-size: .75rem; color: var(--tx-3); }

.section-diagram {
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 28px;
  display: flex; align-items: center; justify-content: center;
  min-height: 260px;
}
.section-diagram svg { max-width: 100%; height: auto; }

.detail-sidebar {
  display: flex; flex-direction: column; gap: 20px;
  position: sticky; top: calc(var(--nav-h) + 20px);
}
.action-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 24px;
}
.action-card h4 { font-family: var(--fh); font-size: 1rem; font-weight: 700; margin-bottom: 14px; }
.spec-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.spec-item { display: flex; justify-content: space-between; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--border); font-size: .85rem; }
.spec-item:last-child { border-bottom: none; }
.spec-key { color: var(--tx-3); }
.spec-val { font-family: var(--fm); color: var(--tx-2); font-weight: 500; }

/* ── BREADCRUMB ──────────────────────────────────────────────── */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem; color: var(--tx-3); flex-wrap: wrap;
}
.breadcrumb a { color: var(--tx-3); text-decoration: none; }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb-sep { color: var(--tx-3); opacity: .5; }
.breadcrumb-current { color: var(--tx-2); }

/* ── PAGE HEADER ─────────────────────────────────────────────── */
.page-header {
  background: var(--bg-surface); border-bottom: 1px solid var(--border);
  padding: 40px 0 36px;
}

/* ── CTA BANNER ──────────────────────────────────────────────── */
.cta-banner {
  background: linear-gradient(135deg, #0D1826 0%, #1A2E45 100%);
  border: 1px solid var(--border-md);
  border-radius: var(--r-xl);
  padding: 52px 48px;
  position: relative; overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute; top: -80px; right: -80px;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(232,114,26,.08) 0%, transparent 70%);
}
.cta-banner-inner {
  position: relative; z-index: 1;
  display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap;
}

/* ── TOOL PAGE LAYOUT ────────────────────────────────────────── */
.tool-layout { display: grid; grid-template-columns: 1fr 380px; gap: 32px; align-items: start; }
.tool-panel {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); overflow: hidden;
}
.tool-panel-header {
  background: var(--bg-card-2); border-bottom: 1px solid var(--border);
  padding: 18px 24px; display: flex; align-items: center; gap: 12px;
}
.tool-panel-header h3 { font-family: var(--fh); font-size: 1.05rem; font-weight: 700; }
.tool-panel-body { padding: 28px; }
.tool-panel-footer {
  background: var(--bg-card-2); border-top: 1px solid var(--border);
  padding: 16px 24px; display: flex; gap: 10px;
}

.calc-display {
  background: var(--bg-card-2); border: 1px solid var(--border);
  border-radius: var(--r-lg); overflow: hidden; position: sticky;
  top: calc(var(--nav-h) + 20px);
}
.calc-display-header {
  background: var(--bg-card); border-bottom: 1px solid var(--border);
  padding: 14px 20px;
}
.calc-display-body { padding: 24px; }
.calc-output {
  display: flex; flex-direction: column; gap: 12px;
}
.calc-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 14px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--r);
}
.calc-row-label { font-family: var(--fm); font-size: .78rem; color: var(--tx-3); text-transform: uppercase; letter-spacing: .6px; }
.calc-row-val { font-family: var(--fm); font-size: 1rem; font-weight: 600; color: var(--tx); }
.calc-row.primary { border-color: var(--orange-ring); background: var(--orange-glow); }
.calc-row.primary .calc-row-val { color: var(--orange); font-size: 1.25rem; }

/* ── ABOUT PAGE ──────────────────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.value-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 24px;
}
.value-num {
  font-family: var(--fh); font-size: 2.5rem; font-weight: 800;
  color: var(--orange); line-height: 1; margin-bottom: 10px;
}
.value-title { font-family: var(--fh); font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.value-desc { font-size: .88rem; color: var(--tx-2); line-height: 1.65; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.team-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 24px; text-align: center;
}
.team-avatar {
  width: 64px; height: 64px;
  background: var(--bg-card-2);
  border: 1px solid var(--border-md);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--fh); font-size: 1.4rem; font-weight: 700;
  color: var(--orange); margin: 0 auto 16px;
}
.team-name { font-family: var(--fh); font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.team-role { font-size: .82rem; color: var(--tx-3); }

/* ── CONTACT PAGE ────────────────────────────────────────────── */
.contact-layout { display: grid; grid-template-columns: 1fr 380px; gap: 40px; align-items: start; }
.contact-info-item {
  display: flex; gap: 16px;
  padding: 18px 0; border-bottom: 1px solid var(--border);
}
.contact-info-item:last-child { border-bottom: none; }
.contact-info-icon {
  width: 40px; height: 40px; flex-shrink: 0;
  background: var(--orange-glow); border: 1px solid var(--orange-ring);
  border-radius: var(--r); display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
}
.contact-info-label { font-family: var(--fm); font-size: .72rem; letter-spacing: .8px; text-transform: uppercase; color: var(--tx-3); margin-bottom: 4px; }
.contact-info-val { font-size: .95rem; color: var(--tx-2); }

/* ── FOOTER ──────────────────────────────────────────────────── */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 56px 0 32px;
  margin-top: auto;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
.footer-brand-desc { font-size: .88rem; color: var(--tx-3); line-height: 1.7; margin-top: 14px; max-width: 280px; }
.footer-col-title {
  font-family: var(--fm); font-size: .72rem; font-weight: 500;
  letter-spacing: 1.2px; text-transform: uppercase; color: var(--tx-3);
  margin-bottom: 14px;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.footer-links a { font-size: .88rem; color: var(--tx-3); text-decoration: none; transition: color var(--t); }
.footer-links a:hover { color: var(--orange); }
.footer-bottom {
  border-top: 1px solid var(--border); margin-top: 40px; padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  font-size: .82rem; color: var(--tx-3);
}
.footer-bottom a { color: var(--tx-3); text-decoration: none; }
.footer-bottom a:hover { color: var(--orange); }

/* ── ALERT / NOTICE ──────────────────────────────────────────── */
.alert {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 18px; border-radius: var(--r);
  font-size: .88rem; line-height: 1.55;
  border: 1px solid;
}
.alert-orange { background: var(--orange-glow); border-color: var(--orange-ring); color: var(--orange-lt); }
.alert-green  { background: var(--green-bg);   border-color: rgba(34,197,94,.25); color: var(--green); }
.alert-info   { background: rgba(74,122,160,.1); border-color: rgba(74,122,160,.25); color: var(--steel-lt); }
.alert-icon { flex-shrink: 0; font-size: 1rem; }

/* ── MISC UTILITIES ──────────────────────────────────────────── */
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap-sm { gap: 8px; }
.flex-gap { gap: 16px; }
.flex-gap-lg { gap: 28px; }
.flex-wrap { flex-wrap: wrap; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mt-sm { margin-top: 12px; }
.mt { margin-top: 20px; }
.mt-lg { margin-top: 32px; }
.mt-xl { margin-top: 48px; }
.mb-sm { margin-bottom: 8px; }
.mb { margin-bottom: 16px; }
.mb-lg { margin-bottom: 28px; }
.text-muted { color: var(--tx-2); }
.text-dim { color: var(--tx-3); }
.text-mono { font-family: var(--fm); }
.text-sm { font-size: .85rem; }
.text-xs { font-size: .78rem; }
.fw-700 { font-weight: 700; }
.w-full { width: 100%; }

/* ── RIGHT-CLICK DISABLE ──────────────────────────────────────── */
/* JS handles this — class hook */
.no-select { user-select: none; -webkit-user-select: none; }

/* ── LOADER ──────────────────────────────────────────────────── */
.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border-md);
  border-top-color: var(--orange);
  border-radius: 50%;
  animation: spin .7s linear infinite;
  display: none;
}
.spinner.show { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── EMPTY STATE ─────────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 60px 32px;
  color: var(--tx-3);
}
.empty-state-icon { font-size: 2.5rem; margin-bottom: 14px; opacity: .5; }
.empty-state-text { font-size: .95rem; }

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-layout, .tool-layout, .contact-layout { grid-template-columns: 1fr; }
  .detail-sidebar, .calc-display { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .container, .container-sm, .container-md { padding: 0 18px; }
  .hero { padding: 72px 0 60px; }
  .feature-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: 1fr 1fr; }
  .product-grid { grid-template-columns: 1fr; }
  .detail-props-grid { grid-template-columns: 1fr 1fr; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 36px 24px; }
  .cta-banner-inner { flex-direction: column; }
  .stat-strip-inner { justify-content: center; }
  .value-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 480px) {
  .cat-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: 1fr; }
  .detail-props-grid { grid-template-columns: 1fr; }
  .form-grid.col-3 { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .h-display { font-size: 2rem; }
}

/* ── PRINT ───────────────────────────────────────────────────── */
@media print {
  .navbar, .footer, .btn, .filter-bar, .action-card { display: none !important; }
  body { background: #fff; color: #000; }
  .card, .tool-panel, .result-box { border: 1px solid #ccc; box-shadow: none; }
}
