/* ═══════════════════════════════════════════════
   EHS HAZARD COMMUNICATION — Style Sheet
   Color system: safety blues, alert reds, OSHA inspired
   ═══════════════════════════════════════════════ */

/* ─── DESIGN TOKENS ─── */
:root, [data-theme="light"] {
  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* Spacing */
  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem;
  --space-4: 1rem;    --space-5: 1.25rem; --space-6: 1.5rem;
  --space-8: 2rem;    --space-10: 2.5rem; --space-12: 3rem;
  --space-16: 4rem;   --space-20: 5rem;   --space-24: 6rem;

  /* Safety-themed palette — strong blues + alert reds */
  --color-bg:             #f4f6f8;
  --color-surface:        #ffffff;
  --color-surface-2:      #f0f4f8;
  --color-surface-offset: #e8eef4;
  --color-divider:        #d0dae4;
  --color-border:         #c4d0dc;

  --color-text:           #1a2433;
  --color-text-muted:     #546070;
  --color-text-faint:     #96a6b4;
  --color-text-inverse:   #f4f6f8;

  --color-primary:        #1a5f8a;
  --color-primary-hover:  #154e73;
  --color-primary-active: #0f3c59;
  --color-primary-highlight: #d0e6f5;

  --color-accent2:        #e8c040;  /* yellow accent for star/special */

  --color-danger:         #c0392b;
  --color-warning:        #d68910;
  --color-success:        #1e8449;
  --color-info:           #1a5f8a;

  --radius-sm: 0.375rem; --radius-md: 0.5rem;
  --radius-lg: 0.75rem;  --radius-xl: 1rem; --radius-full: 9999px;

  --shadow-sm: 0 1px 3px rgba(20,40,60,0.08);
  --shadow-md: 0 4px 14px rgba(20,40,60,0.10);
  --shadow-lg: 0 12px 36px rgba(20,40,60,0.14);

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 980px;
  --content-wide: 1200px;

  --font-display: 'Space Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;

  /* SVG inline theme vars */
  --svg-bg: #f9f8f5;
  --svg-border: #d4d1ca;
}

[data-theme="dark"] {
  --color-bg:             #101820;
  --color-surface:        #162030;
  --color-surface-2:      #1c2a3c;
  --color-surface-offset: #1a2636;
  --color-divider:        #243448;
  --color-border:         #2d4054;
  --color-text:           #d4dce6;
  --color-text-muted:     #7a90a4;
  --color-text-faint:     #4a5c6e;
  --color-text-inverse:   #101820;
  --color-primary:        #4a9fd4;
  --color-primary-hover:  #62b0e4;
  --color-primary-active: #3080b0;
  --color-primary-highlight: #1a3050;
  --color-accent2:        #f0d060;
  --color-danger:         #e05040;
  --color-warning:        #e8a820;
  --color-success:        #30a860;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 14px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 36px rgba(0,0,0,0.45);
  --svg-bg: #1c2a3c;
  --svg-border: #2d4054;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #101820; --color-surface: #162030; --color-surface-2: #1c2a3c;
    --color-surface-offset: #1a2636; --color-divider: #243448; --color-border: #2d4054;
    --color-text: #d4dce6; --color-text-muted: #7a90a4; --color-text-faint: #4a5c6e;
    --color-text-inverse: #101820; --color-primary: #4a9fd4; --color-primary-hover: #62b0e4;
    --color-primary-active: #3080b0; --color-primary-highlight: #1a3050;
    --color-accent2: #f0d060; --color-danger: #e05040; --color-warning: #e8a820;
    --color-success: #30a860;
    --svg-bg: #1c2a3c; --svg-border: #2d4054;
  }
}

/* ─── RESET & BASE ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  min-height: 100dvh; line-height: 1.6;
  font-family: var(--font-body); font-size: var(--text-base);
  color: var(--color-text); background-color: var(--color-bg);
  transition: background-color 0.3s, color 0.3s;
}
img, picture, video, canvas, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
h1,h2,h3,h4,h5,h6 { text-wrap: balance; line-height: 1.2; font-family: var(--font-display); }
p, li { text-wrap: pretty; }
::selection { background: var(--color-primary-highlight); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-interactive); }
a:hover { color: var(--color-primary-hover); }
button { cursor: pointer; background: none; border: none; }

/* ─── LAYOUT ─── */
.container {
  width: 100%; max-width: var(--content-wide);
  margin: 0 auto; padding: 0 var(--space-6);
}
@media (max-width: 640px) { .container { padding: 0 var(--space-4); } }

/* ─── HEADER ─── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklab, var(--color-surface) 95%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex; align-items: center; gap: var(--space-6);
  max-width: var(--content-wide); margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  height: 68px;
}
.header-brand { display: flex; align-items: center; gap: var(--space-3); flex-shrink: 0; }
.header-logo-link { display: flex; flex-shrink: 0; border-radius: var(--radius-md); }
.header-logo { width: 120px; height: 44px; object-fit: contain; border-radius: var(--radius-md); background: white; padding: 3px; box-shadow: var(--shadow-sm); }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 700; color: var(--color-primary); }
.brand-sub { font-size: var(--text-xs); color: var(--color-text-muted); }
.header-nav { display: flex; align-items: center; gap: var(--space-1); margin-left: auto; }
.header-nav a {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-md);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.header-nav a:hover { color: var(--color-text); background: var(--color-surface-2); }
.nav-cta {
  background: var(--color-primary) !important; color: white !important;
  font-weight: 600 !important; padding: var(--space-2) var(--space-4) !important;
}
.nav-cta:hover { background: var(--color-primary-hover) !important; }
.theme-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: var(--radius-md);
  color: var(--color-text-muted); flex-shrink: 0;
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-2); }
.mobile-menu-btn { display: none; align-items: center; justify-content: center; width: 36px; height: 36px; color: var(--color-text-muted); border-radius: var(--radius-md); }
.mobile-nav { display: none; flex-direction: column; padding: var(--space-4) var(--space-6); gap: var(--space-2); border-top: 1px solid var(--color-border); background: var(--color-surface); }
.mobile-nav a { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); padding: var(--space-2) var(--space-3); border-radius: var(--radius-md); }
.mobile-nav a:hover { background: var(--color-surface-2); color: var(--color-text); }
.mobile-nav.open { display: flex; }
@media (max-width: 900px) { .header-nav { display: none; } .mobile-menu-btn { display: flex; } }

/* ─── HERO ─── */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(var(--space-16), 10vw, var(--space-24)) 0 clamp(var(--space-12), 8vw, var(--space-20));
  background: var(--color-surface);
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 70% 50%, color-mix(in oklab, var(--color-primary) 12%, transparent) 0%, transparent 70%),
              radial-gradient(ellipse at 20% 80%, color-mix(in oklab, var(--color-danger) 8%, transparent) 0%, transparent 60%);
}
.hero .container { position: relative; z-index: 1; }
.hero-logo-badge {
  display: flex; align-items: center; gap: var(--space-4);
  margin-bottom: var(--space-6);
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-3) var(--space-5);
  width: fit-content; box-shadow: var(--shadow-sm);
}
.hero-logo { width: 160px; height: 56px; object-fit: contain; flex-shrink: 0; border-radius: var(--radius-md); background: white; padding: 4px; }
.hero-logo-text { display: flex; flex-direction: column; gap: 2px; }
.hero-logo-title { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); }
.hero-logo-sub { font-size: var(--text-xs); color: var(--color-text-muted); }

.hero-badge {
  display: inline-block; font-size: var(--text-xs); font-weight: 600; letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--color-primary);
  background: var(--color-primary-highlight); border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-4); margin-bottom: var(--space-5);
}
.hero-title {
  font-size: var(--text-2xl); font-weight: 700; letter-spacing: -0.02em;
  color: var(--color-text); margin-bottom: var(--space-4); max-width: 16ch;
}
.hero-accent { color: var(--color-primary); }
.hero-sub { font-size: var(--text-base); color: var(--color-text-muted); max-width: 60ch; margin-bottom: var(--space-6); line-height: 1.7; }
.hero-pills { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-8); }
.pill { display: inline-flex; align-items: center; gap: var(--space-1); font-size: var(--text-xs); font-weight: 600; padding: var(--space-1) var(--space-3); border-radius: var(--radius-full); border: 1.5px solid; }
.pill-ghs { color: #c62828; border-color: #c62828; background: #ffebee; }
.pill-osha { color: #1565c0; border-color: #1565c0; background: #e3f2fd; }
.pill-sds { color: #2e7d32; border-color: #2e7d32; background: #e8f5e9; }
[data-theme="dark"] .pill-ghs { background: #3d1010; }
[data-theme="dark"] .pill-osha { background: #0a1f40; }
[data-theme="dark"] .pill-sds { background: #0d2a14; }
.hero-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-4); max-width: 900px; }
.hero-card {
  display: flex; align-items: center; gap: var(--space-4);
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-4) var(--space-5);
  text-decoration: none; color: var(--color-text);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive), border-color var(--transition-interactive);
}
.hero-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--color-primary); color: var(--color-text); }
.hero-card strong { display: block; font-size: var(--text-sm); font-weight: 700; margin-bottom: var(--space-1); }
.hero-card p { font-size: var(--text-xs); color: var(--color-text-muted); margin: 0; max-width: none; }
.hero-card-icon { flex-shrink: 0; }

/* ─── SECTIONS ─── */
.section { padding: clamp(var(--space-12), 8vw, var(--space-24)) 0; }
.section-alt { background: var(--color-surface); }
.section-search { background: linear-gradient(135deg, var(--color-primary-highlight) 0%, var(--color-surface) 100%); }
.section-header { text-align: center; margin-bottom: clamp(var(--space-8), 5vw, var(--space-16)); }
.section-tag {
  display: inline-block; font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-primary);
  background: var(--color-primary-highlight); border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-4); margin-bottom: var(--space-3);
}
.section-header h2 { font-size: var(--text-xl); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-3); }
.section-intro { font-size: var(--text-base); color: var(--color-text-muted); max-width: 65ch; margin: 0 auto; line-height: 1.7; }
.subsection-title { font-size: var(--text-lg); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-5); }
.text-center { text-align: center; }

/* ─── INFO CARDS (GHS 3-col) ─── */
.ghs-three-col { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--space-5); margin-bottom: var(--space-12); }
.info-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-6);
  transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.info-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.info-card-icon { width: 48px; height: 48px; border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-4); }
.info-card h3 { font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-2); }
.info-card p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; }

/* ─── LABEL ANATOMY ─── */
.label-anatomy { margin-top: var(--space-4); }
.label-diagram { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-6); overflow-x: auto; box-shadow: var(--shadow-sm); }
.label-diagram svg { width: 100%; max-width: 780px; height: auto; display: block; margin: 0 auto; }

/* ─── PICTOGRAM GRID ─── */
.pictogram-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: var(--space-5); margin-bottom: var(--space-10); }
.pictogram-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-5);
  text-align: center; transition: box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.pictogram-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.pictogram-svg-wrap { width: 80px; height: 80px; margin: 0 auto var(--space-3); }
.pictogram-svg-wrap svg { width: 100%; height: 100%; }
.pictogram-img-wrap { width: 90px; height: 90px; margin: 0 auto var(--space-3); display: flex; align-items: center; justify-content: center; }
.pictogram-img-wrap img { width: 90px; height: 90px; object-fit: contain; display: block; }
.pictogram-card h4 { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-2); }
.pictogram-card p { font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.5; margin-bottom: var(--space-3); }
.pictogram-examples { display: flex; flex-wrap: wrap; gap: var(--space-1); justify-content: center; }
.pictogram-examples span { font-size: var(--text-xs); background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-full); padding: 2px var(--space-2); color: var(--color-text-muted); }

/* ─── TABLES ─── */
.ref-table-wrap { margin-top: var(--space-8); }
.ref-table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); background: var(--color-surface); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
.ref-table th { background: var(--color-primary); color: white; font-weight: 700; padding: var(--space-3) var(--space-4); text-align: left; font-size: var(--text-xs); letter-spacing: 0.04em; text-transform: uppercase; }
.ref-table td { padding: var(--space-3) var(--space-4); border-bottom: 1px solid var(--color-divider); vertical-align: middle; }
.ref-table tr:last-child td { border-bottom: none; }
.ref-table tr:hover td { background: var(--color-surface-2); }
.badge { display: inline-block; font-weight: 800; font-size: var(--text-sm); padding: var(--space-1) var(--space-4); border-radius: var(--radius-full); letter-spacing: 0.06em; }
.badge-danger { background: #c62828; color: white; }
.badge-warning { background: #f57f17; color: white; }
.badge-neutral { background: var(--color-surface-offset); color: var(--color-text-muted); border: 1px solid var(--color-border); }

/* ─── NFPA ─── */
.nfpa-layout { display: grid; grid-template-columns: 1fr 1.6fr; gap: var(--space-10); align-items: start; margin-bottom: var(--space-10); }
@media (max-width: 900px) { .nfpa-layout { grid-template-columns: 1fr; } }
.nfpa-diamond-wrap { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.nfpa-official-img { display: flex; flex-direction: column; align-items: center; gap: var(--space-3); }
.nfpa-official-img img { width: 100%; height: auto; border-radius: var(--radius-md); display: block; }
.nfpa-ratings { display: flex; flex-direction: column; gap: var(--space-5); }
.nfpa-rating-section { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); }
.nfpa-rating-header { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); color: white; font-weight: 700; font-size: var(--text-sm); }
.nfpa-rating-items { background: var(--color-surface); padding: var(--space-3); display: flex; flex-direction: column; gap: var(--space-2); }
.nfpa-item { display: flex; align-items: flex-start; gap: var(--space-3); padding: var(--space-2); border-radius: var(--radius-sm); }
.nfpa-item:hover { background: var(--color-surface-2); }
.nfpa-item div { font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.5; }
.nfpa-item div strong { color: var(--color-text); display: block; margin-bottom: 2px; }
.nfpa-num { display: flex; align-items: center; justify-content: center; min-width: 28px; height: 28px; border-radius: var(--radius-sm); color: white; font-weight: 800; font-size: var(--text-sm); flex-shrink: 0; }
.comparison-callout { display: flex; align-items: flex-start; gap: var(--space-4); background: #fff8e1; border: 1.5px solid #ffc107; border-radius: var(--radius-lg); padding: var(--space-5); font-size: var(--text-sm); }
[data-theme="dark"] .comparison-callout { background: #2a2010; border-color: #7a5800; }
.callout-icon { font-size: 1.5rem; flex-shrink: 0; line-height: 1.4; }
.comparison-callout strong { display: block; margin-bottom: var(--space-1); font-size: var(--text-base); }
.comparison-callout p { color: var(--color-text-muted); margin: 0; }

/* ─── HMIS ─── */
.hmis-layout { display: grid; grid-template-columns: 360px 1fr; gap: var(--space-10); align-items: start; margin-bottom: var(--space-10); }
@media (max-width: 900px) { .hmis-layout { grid-template-columns: 1fr; } }
.hmis-label-wrap { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-6); box-shadow: var(--shadow-sm); }
.hmis-label { border: 3px solid var(--color-text); border-radius: var(--radius-md); overflow: hidden; margin-bottom: var(--space-5); font-family: var(--font-display); }
.hmis-header { background: var(--color-text); color: var(--color-text-inverse); display: flex; align-items: center; justify-content: space-between; padding: var(--space-2) var(--space-4); }
.hmis-logo { font-weight: 900; font-size: var(--text-lg); letter-spacing: -0.02em; }
.hmis-logo sup { font-size: 0.6em; vertical-align: super; }
.hmis-product { font-size: var(--text-xs); opacity: 0.7; }
.hmis-row { display: flex; align-items: center; padding: var(--space-2) var(--space-3); border-top: 2px solid var(--color-text); gap: var(--space-3); }
.hmis-health { background: #1565c0; color: white; }
.hmis-fire { background: #c62828; color: white; }
.hmis-physical { background: #f57f17; color: white; }
.hmis-ppe { background: var(--color-surface-2); border-color: var(--color-border); }
.hmis-category { font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; flex: 1; }
.hmis-star { font-size: 1.1rem; color: #ffd600; line-height: 1; }
.hmis-star-empty { width: 1.1rem; }
.hmis-rating { min-width: 36px; height: 36px; background: black; color: white; border-radius: var(--radius-sm); font-weight: 900; font-size: var(--text-lg); display: flex; align-items: center; justify-content: center; }
.hmis-ppe-code { min-width: 36px; height: 36px; background: #1565c0; color: white; border-radius: var(--radius-sm); font-weight: 900; font-size: var(--text-lg); display: flex; align-items: center; justify-content: center; font-family: var(--font-display); }
.hmis-controls { padding-top: var(--space-4); border-top: 1px solid var(--color-border); }
.hmis-slider { display: flex; flex-direction: column; gap: var(--space-3); font-size: var(--text-sm); }
.hmis-slider label { display: flex; align-items: center; gap: var(--space-3); }
.hmis-slider select { flex: 1; padding: var(--space-1) var(--space-2); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); }
.hmis-slider input[type="range"] { flex: 1; accent-color: var(--color-primary); }
.hmis-table td { vertical-align: top; }
.hmis-badge { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; border-radius: var(--radius-md); font-weight: 900; color: white; font-size: var(--text-base); }
.h4 { background: #7b1fa2; } .h3 { background: #c62828; } .h2 { background: #e57c00; } .h1 { background: #558b2f; } .h0 { background: #546e7a; }
.ppe-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-3); margin-top: var(--space-4); }
.ppe-card { display: flex; align-items: center; gap: var(--space-3); background: var(--color-surface-2); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-3) var(--space-4); font-size: var(--text-xs); }
.ppe-letter { display: flex; align-items: center; justify-content: center; min-width: 32px; height: 32px; background: var(--color-primary); color: white; border-radius: var(--radius-sm); font-weight: 900; font-size: var(--text-base); font-family: var(--font-display); flex-shrink: 0; }

/* Systems compare */
.systems-compare { margin-top: var(--space-12); }
.compare-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--space-5); }
.compare-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-xl); overflow: hidden; }
.compare-badge { color: white; font-weight: 700; font-size: var(--text-sm); padding: var(--space-3) var(--space-5); }
.compare-card ul { list-style: none; padding: var(--space-5); display: flex; flex-direction: column; gap: var(--space-3); }
.compare-card li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-5); position: relative; line-height: 1.5; }
.compare-card li::before { content: "✓"; position: absolute; left: 0; color: var(--color-success); font-weight: 700; }

/* ─── SDS ─── */
.sds-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-4); margin-bottom: var(--space-10); }
.sds-card { display: flex; gap: var(--space-4); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-4) var(--space-5); transition: box-shadow var(--transition-interactive); }
.sds-card:hover { box-shadow: var(--shadow-md); }
.sds-critical { border-left: 3px solid var(--color-danger); }
.sds-num { display: flex; align-items: center; justify-content: center; min-width: 36px; height: 36px; background: var(--color-primary); color: white; border-radius: var(--radius-md); font-weight: 800; font-size: var(--text-sm); flex-shrink: 0; font-family: var(--font-display); }
.sds-critical .sds-num { background: var(--color-danger); }
.sds-content h4 { font-size: var(--text-sm); font-weight: 700; margin-bottom: var(--space-1); }
.sds-content p { font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.5; }
.sds-tag { display: inline-block; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; padding: 2px var(--space-2); border-radius: var(--radius-full); margin-top: var(--space-2); }
.critical-tag { background: #ffebee; color: #b71c1c; border: 1px solid #ef9a9a; }
.secondary-tag { background: var(--color-surface-2); color: var(--color-text-muted); border: 1px solid var(--color-border); }
[data-theme="dark"] .critical-tag { background: #3d1010; border-color: #7a2020; color: #f48a8a; }
.sds-callout-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: var(--space-5); }
.sds-law-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-xl); padding: var(--space-6); }
.sds-law-icon { font-size: 2rem; margin-bottom: var(--space-3); }
.sds-law-card h4 { font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-2); }
.sds-law-card p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; }

/* ─── SDS SEARCH EMBED ─── */
.search-embed-container { max-width: 900px; margin: 0 auto; }
.search-placeholder { background: var(--color-surface); border: 2px dashed var(--color-primary); border-radius: var(--radius-xl); overflow: hidden; }
.placeholder-inner { padding: var(--space-12) var(--space-8); text-align: center; display: flex; flex-direction: column; align-items: center; gap: var(--space-4); }
.placeholder-icon { opacity: 0.5; margin-bottom: var(--space-2); }
.placeholder-inner h3 { font-size: var(--text-lg); font-weight: 700; color: var(--color-text); }
.placeholder-inner p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: 50ch; line-height: 1.7; }
.code-hint { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-4); text-align: left; width: 100%; max-width: 560px; overflow-x: auto; }
.code-hint pre { margin: 0; }
.code-hint code { font-family: 'Courier New', monospace; font-size: 0.8rem; color: var(--color-primary); line-height: 1.8; }
.placeholder-note { font-size: var(--text-xs); color: var(--color-text-muted); }
.placeholder-note a { color: var(--color-primary); text-decoration: underline; }

/* ─── SDS SEARCH WIDGET ─── */
.sds-search-widget {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.sds-widget-header {
  display: flex; align-items: center; gap: var(--space-4);
  background: var(--color-primary); color: white;
  padding: var(--space-5) var(--space-6);
}
.sds-widget-icon {
  width: 52px; height: 52px; background: rgba(255,255,255,0.15);
  border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.sds-widget-header h3 { font-size: var(--text-lg); font-weight: 700; color: white; margin-bottom: var(--space-1); }
.sds-widget-header p { font-size: var(--text-sm); color: rgba(255,255,255,0.8); margin: 0; max-width: none; }
.sds-form { padding: var(--space-6); border-bottom: 1px solid var(--color-divider); }
.sds-input-row { display: flex; gap: var(--space-3); align-items: stretch; }
.sds-input-wrap {
  flex: 1; position: relative; display: flex; align-items: center;
}
.sds-input-icon {
  position: absolute; left: var(--space-4); color: var(--color-text-muted); pointer-events: none; flex-shrink: 0;
}
.sds-input {
  width: 100%; padding: var(--space-4) var(--space-4) var(--space-4) calc(var(--space-4) + 28px);
  border: 2px solid var(--color-border); border-radius: var(--radius-lg);
  background: var(--color-bg); color: var(--color-text);
  font-size: var(--text-base); font-family: var(--font-body);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
  outline: none;
}
.sds-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}
.sds-input::placeholder { color: var(--color-text-faint); }
.sds-btn {
  display: flex; align-items: center; gap: var(--space-2);
  background: var(--color-primary); color: white;
  border: none; border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-sm); font-weight: 700; font-family: var(--font-display);
  cursor: pointer; white-space: nowrap; flex-shrink: 0;
  transition: background var(--transition-interactive), transform var(--transition-interactive);
}
.sds-btn:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.sds-btn:active { transform: translateY(0); }
.sds-options {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4);
  margin-top: var(--space-4);
}
.sds-options-label { font-size: var(--text-xs); font-weight: 700; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.sds-radio {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: var(--text-sm); color: var(--color-text-muted); cursor: pointer;
}
.sds-radio input[type="radio"] { accent-color: var(--color-primary); cursor: pointer; }
.sds-quick-searches {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-divider);
}
.sds-quick-label { font-size: var(--text-xs); font-weight: 700; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-right: var(--space-1); flex-shrink: 0; }
.sds-quick-btn {
  font-size: var(--text-xs); font-weight: 600;
  background: var(--color-surface-2); color: var(--color-primary);
  border: 1.5px solid var(--color-primary-highlight);
  border-radius: var(--radius-full); padding: var(--space-1) var(--space-3);
  cursor: pointer; transition: background var(--transition-interactive), color var(--transition-interactive), border-color var(--transition-interactive);
}
.sds-quick-btn:hover { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.sds-widget-note {
  display: flex; align-items: center; gap: var(--space-2); flex-wrap: wrap;
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-xs); color: var(--color-text-muted);
}
.sds-widget-note svg { flex-shrink: 0; color: var(--color-primary); }
.sds-widget-note a { color: var(--color-primary); }
@media (max-width: 640px) {
  .sds-input-row { flex-direction: column; }
  .sds-btn { justify-content: center; }
}

/* NFPA Reference Image */
.nfpa-reference-img { margin-top: var(--space-8); }
.nfpa-ref-wrap {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-xl); padding: var(--space-6);
  box-shadow: var(--shadow-sm); text-align: center;
}
.nfpa-ref-wrap img { max-width: 100%; height: auto; max-height: 500px; margin: 0 auto; border-radius: var(--radius-md); }
.nfpa-ref-caption { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-3); }

/* ─── GALLERY ─── */
.section-gallery { background: var(--color-bg); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
}
.gallery-item {
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  background: var(--color-surface);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.gallery-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.gallery-wide { grid-column: span 2; }
.gallery-item img { width: 100%; height: 320px; object-fit: cover; display: block; }
.gallery-wide img { height: 420px; }
.gallery-caption {
  padding: var(--space-4) var(--space-5);
  background: var(--color-surface);
  display: flex; flex-direction: column; gap: var(--space-1);
}
.gallery-caption strong { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); }
.gallery-caption span { font-size: var(--text-xs); color: var(--color-text-muted); }
@media (max-width: 700px) {
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-wide { grid-column: span 1; }
  .gallery-item img, .gallery-wide img { height: 220px; }
}

/* ─── FOOTER ─── */
.site-footer { background: var(--color-text); color: var(--color-text-inverse); padding: var(--space-10) 0; }
.footer-inner { display: flex; flex-direction: column; gap: var(--space-6); }
.footer-brand { display: flex; align-items: center; gap: var(--space-4); }
.footer-logo-img { width: 140px; height: 48px; object-fit: contain; border-radius: var(--radius-md); background: white; padding: 4px; flex-shrink: 0; }
.footer-name { font-family: var(--font-display); font-weight: 700; font-size: var(--text-base); }
.footer-sub { font-size: var(--text-xs); opacity: 0.6; margin-top: var(--space-1); }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-4); border-top: 1px solid rgba(255,255,255,0.1); padding-top: var(--space-5); }
.footer-links a { font-size: var(--text-sm); color: rgba(255,255,255,0.7); transition: color var(--transition-interactive); }
.footer-links a:hover { color: white; }
.footer-legal { display: flex; flex-direction: column; gap: var(--space-2); border-top: 1px solid rgba(255,255,255,0.1); padding-top: var(--space-5); }
.footer-legal p { font-size: var(--text-xs); color: rgba(255,255,255,0.5); }
.footer-legal a { color: rgba(255,255,255,0.6); text-decoration: underline; }
.footer-legal a:hover { color: white; }
.pplx-attr { font-size: var(--text-xs); color: rgba(255,255,255,0.4) !important; margin-top: var(--space-2); }

/* ─── BACK TO TOP ─── */
.back-to-top {
  position: fixed; bottom: var(--space-6); right: var(--space-6);
  width: 44px; height: 44px;
  background: var(--color-primary); color: white;
  border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md); opacity: 0; pointer-events: none;
  transition: opacity var(--transition-interactive), transform var(--transition-interactive);
  z-index: 50;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--color-primary-hover); transform: translateY(-2px); color: white; }

/* ─── RESPONSIVE ─── */
@media (max-width: 640px) {
  .hero-title { font-size: clamp(1.8rem, 8vw, 2.5rem); }
  .pictogram-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .sds-grid { grid-template-columns: 1fr; }
  .nfpa-layout, .hmis-layout { grid-template-columns: 1fr; }
  .placeholder-inner { padding: var(--space-8) var(--space-4); }
}