/* ===== TRU-NORTH SHARED CSS — single source of truth ===== */

/* DESIGN TOKENS */
:root {
  --tn-forest-900: #0f1a15; --tn-forest-800: #162420; --tn-forest-700: #1e342c;
  --tn-forest-600: #2a4a3e; --tn-forest-500: #3c6555; --tn-forest-400: #5c8575;
  --tn-cedar-800: #3a2a1c; --tn-cedar-600: #6b4a30; --tn-cedar-500: #8a6140;
  --tn-cedar-300: #c9a781; --tn-cedar-200: #e3c9a8;
  --tn-fog-50: #f7f3ec; --tn-fog-100: #ede7dc; --tn-fog-200: #ddd4c2; --tn-fog-300: #b7ae9a;
  --tn-slate-900: #1b1e20; --tn-slate-700: #3a4247; --tn-slate-500: #596266; --tn-slate-600: #555e62;
  --tn-rust: #b8502a; --tn-sun: #2ec04b; --tn-sun-dark: #1f9a38; --tn-white: #ffffff;
  --tn-ink: var(--tn-forest-900); --tn-ink-soft: var(--tn-forest-700);
  --tn-paper: var(--tn-fog-50); --tn-paper-warm: var(--tn-fog-100);
  --tn-border: rgba(15, 26, 21, 0.12); --tn-border-strong: rgba(15, 26, 21, 0.22);
  --font-display: "Bricolage Grotesque", "Inter Tight", system-ui, sans-serif;
  --font-serif: "Fraunces", "Playfair Display", Georgia, serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(15,26,21,0.08), 0 1px 1px rgba(15,26,21,0.04);
  --shadow-md: 0 8px 24px -8px rgba(15,26,21,0.18), 0 2px 6px rgba(15,26,21,0.06);
  --shadow-lg: 0 28px 60px -24px rgba(15,26,21,0.35), 0 6px 16px rgba(15,26,21,0.08);
}

/* BASE */
body { margin: 0; background: var(--tn-forest-900); -webkit-text-size-adjust: 100%; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; max-width: 100vw; }
*, *::before, *::after { box-sizing: border-box; }
section { scroll-margin-top: 72px; }
a, button { -webkit-tap-highlight-color: transparent; }
img, video, svg, iframe { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--tn-sun); outline-offset: 2px; }

/* ROOT */
.tn-root, .tn-root * { box-sizing: border-box; }
.tn-root {
  font-family: var(--font-body); color: var(--tn-ink); background: var(--tn-paper);
  -webkit-font-smoothing: antialiased; font-feature-settings: "ss01", "cv11"; line-height: 1.55;
  overflow-x: clip; width: 100%; max-width: 100vw;
}
.tn-root input, .tn-root textarea, .tn-root select { font-size: 16px; }

/* TYPOGRAPHY */
.tn-display { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.03em; line-height: 0.95; }
.tn-serif { font-family: var(--font-serif); font-weight: 500; letter-spacing: -0.02em; line-height: 1.02; font-style: italic; }
.tn-eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 500; }
.tn-body-lg { font-size: 19px; line-height: 1.55; color: var(--tn-ink-soft); }

/* BUTTONS */
.tn-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px;
  font-family: var(--font-display); font-weight: 600; font-size: 15px;
  letter-spacing: -0.01em; border: 1px solid transparent;
  cursor: pointer; transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  text-decoration: none; min-height: 44px;
}
.tn-btn--primary { background: var(--tn-forest-900); color: var(--tn-fog-50); }
.tn-btn--primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); background: var(--tn-forest-700); }
.tn-btn--sun { background: var(--tn-sun); color: var(--tn-forest-900); }
.tn-btn--sun:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.tn-btn--ghost { background: transparent; color: var(--tn-fog-50); border-color: rgba(247,243,236,0.35); }
.tn-btn--ghost:hover { background: rgba(247,243,236,0.08); }
.tn-btn--ink-ghost { background: transparent; color: var(--tn-ink); border-color: var(--tn-border-strong); }
.tn-btn--ink-ghost:hover { background: rgba(15,26,21,0.04); }

/* LAYOUT */
.tn-section { padding: 120px 64px; }
.tn-hline { height: 1px; background: var(--tn-border); border: 0; }

/* GRAIN TEXTURE */
.tn-grain::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='140' height='140'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.35 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/></svg>");
  opacity: 0.5; mix-blend-mode: overlay;
}

/* PILLS */
.tn-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 12px; border-radius: 999px;
  background: rgba(247,243,236,0.1); border: 1px solid rgba(247,243,236,0.2);
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--tn-fog-100);
}
.tn-pill--ink { background: rgba(15,26,21,0.04); border-color: var(--tn-border); color: var(--tn-ink-soft); }

/* FORMS */
.tn-input, .tn-textarea, .tn-select {
  width: 100%; padding: 14px 16px; background: var(--tn-white);
  border: 1px solid var(--tn-border-strong); border-radius: var(--r-md);
  font-family: var(--font-body); font-size: 15px; color: var(--tn-ink);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.tn-input:focus, .tn-textarea:focus, .tn-select:focus {
  outline: none; border-color: var(--tn-forest-600);
  box-shadow: 0 0 0 3px rgba(42,74,62,0.15);
}
.tn-label {
  display: block; font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--tn-slate-700);
  margin-bottom: 8px; font-weight: 500;
}

/* IMAGES */
.tn-img { display: block; width: 100%; height: 100%; object-fit: cover; }
.tn-artboard img { max-width: 100%; }

/* DARK MODE */
.tn-dark { background: var(--tn-forest-900); color: var(--tn-fog-50); }
.tn-dark .tn-label { color: var(--tn-fog-300); }
.tn-dark .tn-input, .tn-dark .tn-textarea, .tn-dark .tn-select {
  background: rgba(247,243,236,0.06); border-color: rgba(247,243,236,0.18); color: var(--tn-fog-50);
}
.tn-dark .tn-input::placeholder, .tn-dark .tn-textarea::placeholder { color: var(--tn-fog-300); }

/* AUTOCOMPLETE */
.tn-autocomplete-dropdown {
  position: absolute; top: 100%; left: 0; right: 0; z-index: 50;
  background: var(--tn-white); border: 1px solid var(--tn-border-strong);
  border-radius: 0 0 var(--r-md) var(--r-md); box-shadow: var(--shadow-md);
  max-height: 220px; overflow-y: auto;
}
.tn-autocomplete-dropdown button {
  display: block; width: 100%; text-align: left; padding: 12px 16px;
  border: 0; background: transparent; cursor: pointer;
  font-family: var(--font-body); font-size: 14px; color: var(--tn-ink);
  border-bottom: 1px solid var(--tn-border);
}
.tn-autocomplete-dropdown button:hover { background: var(--tn-fog-50); }
.tn-autocomplete-dropdown button:last-child { border-bottom: 0; }

/* SKIP LINK */
.skip-link { position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden; z-index: 99999; }
.skip-link:focus {
  position: fixed; left: 16px; top: 16px; width: auto; height: auto;
  padding: 12px 24px; background: var(--tn-forest-900); color: var(--tn-fog-50);
  border-radius: 8px; font-size: 16px; font-weight: 600; text-decoration: none; box-shadow: var(--shadow-lg);
}

/* BLOG ARTICLE */
.blog-article { max-width: 760px; margin: 0 auto; font-size: 17px; line-height: 1.7; color: var(--tn-ink); }
.blog-article h2 { font-family: var(--font-display); font-size: 28px; font-weight: 600; margin: 48px 0 16px; letter-spacing: -0.02em; color: var(--tn-forest-900); }
.blog-article h3 { font-family: var(--font-display); font-size: 20px; font-weight: 600; margin: 32px 0 12px; color: var(--tn-forest-800); }
.blog-article p { margin: 0 0 20px; }
.blog-article ul, .blog-article ol { margin: 0 0 20px; padding-left: 24px; }
.blog-article li { margin-bottom: 10px; }
.blog-article blockquote {
  margin: 32px 0; padding: 20px 24px; border-left: 3px solid var(--tn-forest-600);
  background: var(--tn-fog-100); border-radius: 0 8px 8px 0; font-style: italic; color: var(--tn-forest-700);
}
.blog-article a { color: var(--tn-forest-600); text-decoration: underline; text-underline-offset: 2px; }
.blog-article a:hover { color: var(--tn-forest-500); }
.blog-article a.tn-btn--sun { color: var(--tn-forest-900); text-decoration: none; }
.blog-article a.tn-btn--ghost { color: var(--tn-fog-50); text-decoration: none; }

/* ===== NAV ===== */
.tn-nav-header {
  transition: box-shadow .3s ease, padding .3s ease;
}
.tn-nav-header--scrolled {
  box-shadow: 0 1px 12px rgba(15,26,21,0.10);
}

/* NAV RESPONSIVE — mobile-first: defaults to mobile, CSS upgrades to desktop */
@media (min-width: 921px) {
  .tn-nav-links { display: flex !important; }
  .tn-nav-hamburger { display: none !important; }
  .tn-nav-phone { display: inline-flex !important; }
  .tn-nav-storm { display: inline !important; }
  .tn-nav-header { padding: 16px 48px !important; }
}
@media (max-width: 1200px) {
  .tn-nav-storm { display: none !important; }
}
@media (max-width: 1050px) {
  .tn-nav-links { gap: 4px !important; font-size: 13px !important; }
}
@media (max-width: 920px) {
  .tn-nav-links { display: none !important; }
  .tn-nav-header { padding-left: 20px !important; padding-right: 20px !important; }
  .tn-nav-hamburger { display: flex !important; }
  .tn-nav-phone, .tn-nav-storm { display: none !important; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .tn-section { padding: 80px 32px !important; }
}

@media (max-width: 900px) {
  .tn-section { padding: 56px 20px !important; }
  .tn-grid-2col, .tn-grid-service, .tn-grid-estimate,
  .tn-grid-chat-estimate, .tn-grid-compare, .tn-grid-cta-final { grid-template-columns: 1fr !important; gap: 32px !important; }
  .tn-grid-chat-estimate > div { padding: 16px !important; border-radius: 14px !important; overflow: hidden !important; max-width: 100% !important; }
  #estimate .tn-display { font-size: clamp(24px, 7vw, 40px) !important; }
  #estimate .tn-serif { font-size: clamp(22px, 6.5vw, 36px) !important; }
  #estimate .tn-body-lg { font-size: 15px !important; margin-top: 4px !important; }
  .tn-estimator-grid { grid-template-columns: 1fr !important; gap: 20px !important; }
  .tn-estimate-result { font-size: 32px !important; }
  .tn-estimate-result span { font-size: 18px !important; }
  .tn-sticky-side { position: relative !important; top: 0 !important; }
  .tn-footer-grid { grid-template-columns: 1fr 1fr !important; gap: 24px !important; }
  .tn-grid-reviews { grid-template-columns: 1fr 1fr !important; gap: 12px !important; }
  .tn-steps-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
  .tn-steps-grid > div:last-child { grid-column: 1 / -1; max-width: 50%; margin: 0 auto; }
  .tn-chat-fab { bottom: 90px !important; }
  .tn-chat-panel { bottom: 90px !important; height: min(480px, calc(100vh - 120px)) !important; width: calc(100vw - 24px) !important; right: 12px !important; }
  .tn-compare-mobile > div { padding: 14px !important; }
  .tn-compare-mobile > div > div:last-child { grid-template-columns: 1fr 1fr !important; gap: 6px !important; }
  .tn-section-flex { flex-direction: column !important; gap: 12px !important; align-items: flex-start !important; }
  .tn-section-flex .tn-body-lg { max-width: 100% !important; }
  .tn-marquee-header { flex-direction: column !important; align-items: flex-start !important; gap: 12px !important; padding: 0 20px !important; }
  .tn-marquee-header .tn-btn { display: none !important; }
  .tn-display { font-size: clamp(28px, 8vw, 56px) !important; letter-spacing: -0.02em !important; }
  .tn-serif { font-size: clamp(26px, 7vw, 52px) !important; }
  .tn-cta-phone { font-size: clamp(28px, 8vw, 48px) !important; }
  .tn-body-lg { font-size: 16px !important; }
  .tn-hero-section { min-height: 480px !important; height: 80vh !important; }
  .tn-hero-pills { top: 80px !important; left: 16px !important; right: 16px !important; }
  .tn-trust-bar { padding: 14px 16px !important; gap: 8px 16px !important; flex-wrap: wrap !important; justify-content: center !important; }
  .tn-trust-bar > div { font-size: 11px !important; gap: 6px !important; }
  .tn-footer { padding: 48px 20px 24px !important; }
  .tn-footer-bottom { flex-direction: column !important; gap: 12px !important; text-align: center !important; }
  .tn-btn { padding: 12px 18px !important; font-size: 14px !important; }
}

@media (max-width: 600px) {
  .tn-section { padding: 40px 14px !important; }
  .tn-footer { padding: 36px 14px 20px !important; }
  .tn-footer-grid { grid-template-columns: 1fr !important; gap: 28px !important; }
  .tn-footer-bottom { font-size: 11px !important; }
  .tn-grid-reviews { grid-template-columns: 1fr !important; }
  .tn-hero-section { min-height: 420px !important; height: 75vh !important; }
  .tn-hero-pills { gap: 6px !important; }
  .tn-hero-pills .tn-pill { font-size: 11px !important; padding: 4px 8px !important; }
  .tn-trust-bar > div:nth-child(n+4) { display: none !important; }
  .tn-display { font-size: clamp(24px, 9vw, 44px) !important; }
  .tn-serif { font-size: clamp(22px, 8vw, 40px) !important; }
  .tn-cta-phone { font-size: clamp(24px, 7vw, 36px) !important; }
  #estimate .tn-display { font-size: clamp(20px, 6vw, 32px) !important; line-height: 1.1 !important; }
  #estimate .tn-serif { font-size: clamp(18px, 5.5vw, 28px) !important; }
  .tn-estimate-result { font-size: 26px !important; letter-spacing: -0.03em !important; }
  .tn-estimate-result span { font-size: 15px !important; }
  .tn-grid-chat-estimate > div { padding: 12px !important; }
  #estimate .tn-pill { font-size: 10px !important; padding: 4px 8px !important; }
  .tn-steps-grid { grid-template-columns: 1fr !important; }
  .tn-steps-grid > div:last-child { max-width: 100% !important; grid-column: auto !important; }
}

/* ANIMATIONS */
@keyframes fade-up { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fade-in-scale { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
@keyframes slide-in-left { from { opacity: 0; transform: translateX(-30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes slide-in-right { from { opacity: 0; transform: translateX(30px); } to { opacity: 1; transform: translateX(0); } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }