/* ==========================================================================
   ThinkArmitage Consulting — Stylesheet
   Design language: Swiss / International Typographic Style. The brand name
   itself ("Think") points at clarity of thought — so the whole system is
   built to feel like clear thinking looks: a visible grid, oversized index
   numerals, a single bold signal color, and nothing decorative. No icons,
   no textures, no dark hero band, no gradients, no shadows.
   Palette: near-white paper, near-black ink, one bold signal blue.
   Type: Space Grotesk (display — geometric, distinctive numerals) +
   Inter (body/UI).
   ========================================================================== */

:root {
  --paper: #fafaf8;
  --ink: #121212;
  --grey: #6b6b66;
  --signal: #1e40ff;
  --signal-dark: #1530c4;
  --line: rgba(17, 17, 17, 0.16);
  --line-strong: #121212;

  --font-display: "Space Grotesk", "Arial Narrow", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --container: 1200px;
  --radius: 0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0 0 0.4em;
}
h1 { font-size: clamp(2.6rem, 6vw, 5.4rem); font-weight: 500; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.7rem); }
h3 { font-size: 1.3rem; font-weight: 500; }
h4 { font-size: 1.05rem; font-weight: 500; }

p { margin: 0 0 1.1em; color: var(--ink); }
a { color: var(--signal); text-decoration: none; }
a:hover { color: var(--signal-dark); }
img { max-width: 100%; display: block; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; }
.section { padding: 100px 0; }
.section-sm { padding: 56px 0; }
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-sm { padding: 36px 0; }
}

/* Index label — flush-left, monospace-ish, like a poster's running index */
.index-tag {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-body); font-weight: 600; font-size: 0.76rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal);
  margin-bottom: 20px;
}
.index-tag .mark { color: var(--ink); }

/* Rule — a plain flat line, the only "decoration" this design allows */
.rule { border: none; border-top: 1px solid var(--line); margin: 0; }
.rule-strong { border: none; border-top: 2px solid var(--ink); margin: 0; }

/* ==========================================================================
   Header — no topbar stack, single thin-ruled row
   ========================================================================== */
.site-header { background: var(--paper); border-bottom: 2px solid var(--ink); position: sticky; top: 0; z-index: 999; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; padding-bottom: 20px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.brand-word { font-family: var(--font-display); font-size: 1.32rem; font-weight: 500; line-height: 1; }
.brand-word span {
  display: block; font-family: var(--font-body); font-size: 0.6rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--signal); margin-top: 5px;
}

.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; margin: 0; padding: 0; }
.nav-links a { color: var(--ink); font-weight: 500; font-size: 0.9rem; padding: 4px 0; border-bottom: 2px solid transparent; }
.nav-links a:hover, .nav-links a.active { color: var(--signal); border-bottom-color: var(--signal); }

.nav-cta { display: inline-flex; align-items: center; gap: 8px; background: var(--signal); color: #fff; padding: 11px 22px; font-weight: 600; font-size: 0.86rem; white-space: nowrap; }
.nav-cta:hover { background: var(--signal-dark); color: #fff; }

.header-contact { display: flex; align-items: center; gap: 18px; font-size: 0.82rem; color: var(--grey); }
.header-contact a { color: var(--grey); }
.header-contact a:hover { color: var(--signal); }

.nav-toggle { display: none; background: none; border: 2px solid var(--ink); padding: 7px 10px; color: var(--ink); font-size: 1.1rem; }

@media (max-width: 1080px) { .header-contact { display: none; } }
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta.desktop-only { display: none; }
  .nav-toggle { display: inline-flex; }
  .site-header.open .nav-links {
    display: flex; flex-direction: column; align-items: flex-start; gap: 4px;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--paper); border-bottom: 2px solid var(--ink); padding: 12px 28px 20px;
  }
  .site-header.open .nav-links a { width: 100%; padding: 10px 0; }
}

/* ==========================================================================
   Hero — visible grid rules, oversized headline breaking across columns,
   no colored band, no icon panel.
   ========================================================================== */
.hero { background: var(--paper); padding: 76px 0 0; }
.hero-grid {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.hero-grid > * { border-left: 1px solid var(--line); padding: 44px 24px; }
.hero-grid > *:last-child { border-right: 1px solid var(--line); }
.hero-col-main { grid-column: span 8; }
.hero-col-side { grid-column: span 4; display: flex; flex-direction: column; justify-content: space-between; }
@media (max-width: 900px) {
  .hero-col-main, .hero-col-side { grid-column: span 12; }
}

.hero h1 { max-width: 16ch; }
.hero-lede { font-size: 1.1rem; color: var(--grey); max-width: 48ch; margin: 24px 0 30px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; font-size: 0.88rem; padding: 15px 28px; cursor: pointer; }
.btn-fill { background: var(--ink); color: #fff; border: 2px solid var(--ink); }
.btn-fill:hover { background: var(--signal); border-color: var(--signal); color: #fff; }
.btn-line { background: transparent; color: var(--ink); border: 2px solid var(--ink); }
.btn-line:hover { background: var(--ink); color: #fff; }
.btn-signal { background: var(--signal); color: #fff; border: 2px solid var(--signal); }
.btn-signal:hover { background: var(--signal-dark); border-color: var(--signal-dark); }

.hero-index-list { list-style: none; margin: 0; padding: 0; }
.hero-index-list li { display: flex; align-items: baseline; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 0.94rem; }
.hero-index-list li:first-child { border-top: none; }
.hero-index-list .num { font-family: var(--font-display); color: var(--signal); font-weight: 500; min-width: 24px; }

/* ==========================================================================
   Who-we-serve strip — plain grid cells with rules, no icon badges
   ========================================================================== */
.serve-strip { border-bottom: 1px solid var(--line); }
.serve-strip .container { display: grid; grid-template-columns: repeat(4, 1fr); padding-left: 0; padding-right: 0; }
.serve-cell { padding: 30px 28px; border-left: 1px solid var(--line); }
.serve-cell:first-child { border-left: none; }
.serve-cell .num { font-family: var(--font-display); color: var(--signal); font-size: 1.05rem; display: block; margin-bottom: 8px; }
@media (max-width: 860px) {
  .serve-strip .container { grid-template-columns: repeat(2, 1fr); }
  .serve-cell:nth-child(3) { border-left: none; }
}
@media (max-width: 520px) {
  .serve-strip .container { grid-template-columns: 1fr; }
  .serve-cell { border-left: none; border-top: 1px solid var(--line); }
  .serve-cell:first-child { border-top: none; }
}

/* ==========================================================================
   Section headers
   ========================================================================== */
.section-head { max-width: 680px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--grey); font-size: 1.02rem; }

/* ==========================================================================
   Services — huge index numerals, flat rows, no icon cards
   ========================================================================== */
.index-list { border-top: 2px solid var(--ink); }
.index-row {
  display: grid; grid-template-columns: 130px 1fr 1.2fr; gap: 32px;
  padding: 38px 0; border-bottom: 1px solid var(--line); align-items: start;
}
.index-row .big-num { font-family: var(--font-display); font-size: 3.4rem; color: var(--signal); line-height: 1; font-weight: 500; }
.index-row h3 { margin-bottom: 8px; }
.index-row p { color: var(--grey); font-size: 0.97rem; margin: 0; }
@media (max-width: 780px) {
  .index-row { grid-template-columns: 70px 1fr; }
  .index-row p.desc-col { grid-column: 1 / -1; margin-top: 10px; }
  .index-row .big-num { font-size: 2.4rem; }
}

/* ==========================================================================
   Split blocks — grid-ruled panel instead of icon/diagram visual
   ========================================================================== */
.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.split.reverse .split-visual { order: 2; }
@media (max-width: 860px) {
  .split, .split.reverse { grid-template-columns: 1fr; }
  .split.reverse .split-visual { order: 0; }
}
.split > div { padding: 48px; }
.split-visual { border-left: 1px solid var(--line); display: flex; flex-direction: column; justify-content: space-between; background: #fff; }
.split.reverse .split-visual { border-left: none; border-right: 1px solid var(--line); }
@media (max-width: 860px) { .split-visual { border-left: none; border-top: 1px solid var(--line); } }
.split-visual .visual-num { font-family: var(--font-display); font-size: 5.5rem; color: var(--signal); line-height: 1; }
.split-visual .visual-caption { font-size: 0.85rem; color: var(--grey); max-width: 30ch; }

.checklist { list-style: none; margin: 24px 0; padding: 0; }
.checklist li { display: flex; gap: 14px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 0.97rem; }
.checklist li:first-child { border-top: none; }
.checklist .mark { flex-shrink: 0; font-family: var(--font-display); color: var(--signal); font-weight: 500; }

/* ==========================================================================
   Process — flat 4-up grid with big numerals, no boxes/shadows
   ========================================================================== */
.process { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 2px solid var(--ink); border-bottom: 1px solid var(--line); }
.process-step { padding: 34px 28px; border-left: 1px solid var(--line); }
.process-step:first-child { border-left: none; }
.process-step .step-num { font-family: var(--font-display); color: var(--signal); font-size: 2.1rem; display: block; margin-bottom: 10px; }
@media (max-width: 768px) {
  .process { grid-template-columns: 1fr; }
  .process-step { border-left: none; border-top: 1px solid var(--line); }
  .process-step:first-child { border-top: none; }
}

/* ==========================================================================
   Founder pull-quote — huge quotation mark as the only ornament
   ========================================================================== */
.pull-quote { border-top: 2px solid var(--ink); padding-top: 40px; }
.pull-quote .mark-quote { font-family: var(--font-display); font-size: 4.5rem; color: var(--signal); line-height: 1; display: block; margin-bottom: 6px; }
.pull-quote p.quote { font-family: var(--font-display); font-size: 1.8rem; font-weight: 500; color: var(--ink); line-height: 1.3; max-width: 44ch; }
.pull-quote .quote-attr { margin-top: 20px; font-size: 0.92rem; color: var(--grey); }
.pull-quote .quote-attr strong { color: var(--ink); display: block; font-size: 1rem; }

/* ==========================================================================
   CTA band — the one full-bleed signal-color block on the page
   ========================================================================== */
.cta-band { background: var(--signal); color: #fff; }
.cta-band .container { padding: 56px 28px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band h2 { color: #fff; margin-bottom: 6px; }
.cta-band p { color: rgba(255,255,255,0.85); margin: 0; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { background: var(--ink); color: #c9c9c4; padding-top: 68px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 52px; }
@media (max-width: 900px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: #fff; font-family: var(--font-body); font-size: 0.78rem; letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 20px; font-weight: 600; }
.site-footer .brand-word { color: #fff; }
.site-footer .brand-word span { color: #6b8bff; }
.site-footer p { color: #9c9c96; font-size: 0.92rem; }
.footer-links { list-style: none; margin: 0; padding: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #c9c9c4; font-size: 0.92rem; }
.footer-links a:hover { color: #6b8bff; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; font-size: 0.92rem; }
.footer-contact .mark { color: #6b8bff; }

.footer-social { display: flex; gap: 10px; margin-top: 18px; }
.footer-social a { width: 34px; height: 34px; border: 1px solid rgba(255,255,255,0.25); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 0.85rem; }
.footer-social a:hover { background: #6b8bff; border-color: #6b8bff; color: var(--ink); }

.newsletter-form { display: flex; margin-top: 8px; border: 1px solid rgba(255,255,255,0.25); }
.newsletter-form input { flex: 1; border: none; background: transparent; color: #fff; padding: 12px 14px; font-family: var(--font-body); font-size: 0.9rem; }
.newsletter-form input::placeholder { color: #86867f; }
.newsletter-form input:focus { outline: none; }
.newsletter-form button { border: none; background: #6b8bff; color: var(--ink); font-weight: 700; font-size: 0.85rem; padding: 0 18px; cursor: pointer; }

.copyright { border-top: 1px solid rgba(255,255,255,0.14); padding: 20px 0; font-size: 0.85rem; color: #86867f; }
.copyright .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.copyright a { color: #c9c9c4; }
.copyright a:hover { color: #6b8bff; }

/* ==========================================================================
   Page header (inner pages)
   ========================================================================== */
.page-header { background: var(--paper); border-bottom: 2px solid var(--ink); padding: 58px 0 46px; }
.breadcrumb-trail { font-size: 0.85rem; color: var(--grey); margin-top: 10px; }
.breadcrumb-trail a { color: var(--grey); }
.breadcrumb-trail a:hover { color: var(--signal); }
.breadcrumb-trail .sep { margin: 0 8px; opacity: 0.6; }

/* ==========================================================================
   Legal pages
   ========================================================================== */
.legal-content h2 { font-size: 1.28rem; margin-top: 2.1em; padding-top: 0.4em; border-top: 1px solid var(--line); }
.legal-content h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.legal-content p, .legal-content li { color: var(--grey); font-size: 0.98rem; }
.legal-content strong { color: var(--ink); }
.legal-meta { display: inline-block; font-size: 0.85rem; color: var(--grey); border: 1px solid var(--line); padding: 8px 16px; margin-bottom: 40px; }
.legal-toc { border: 2px solid var(--ink); padding: 24px 28px; margin-bottom: 44px; }
.legal-toc h4 { margin-bottom: 12px; font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--signal); }
.legal-toc ol { margin: 0; padding-left: 20px; columns: 2; gap: 24px; }
.legal-toc li { font-size: 0.92rem; margin-bottom: 8px; }
.legal-toc a { color: var(--ink); }
.legal-toc a:hover { color: var(--signal); }
@media (max-width: 640px) { .legal-toc ol { columns: 1; } }
.legal-layout { display: grid; grid-template-columns: 1fr; max-width: 780px; margin: 0 auto; }

/* ==========================================================================
   FAQ / support
   ========================================================================== */
.faq-item { border-bottom: 1px solid var(--line); padding: 22px 0; }
.faq-item summary { font-family: var(--font-display); font-size: 1.08rem; font-weight: 500; color: var(--ink); cursor: pointer; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .toggle-icon { flex-shrink: 0; width: 26px; height: 26px; border: 2px solid var(--ink); display: flex; align-items: center; justify-content: center; font-family: var(--font-body); color: var(--signal); }
.faq-item[open] summary .toggle-icon::before { content: "\2212"; }
.faq-item:not([open]) summary .toggle-icon::before { content: "\002B"; }
.faq-item p { margin-top: 14px; color: var(--grey); }

.support-tiles { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 2px solid var(--ink); }
@media (max-width: 860px) { .support-tiles { grid-template-columns: 1fr; } }
.support-tile { border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 32px 28px; text-align: left; }
.support-tile:last-child { border-right: none; }
.support-tile .num { display: block; font-family: var(--font-display); color: var(--signal); font-size: 1.7rem; margin-bottom: 10px; }
.support-tile a.tile-link { font-weight: 600; font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; margin-top: 10px; }

/* ==========================================================================
   Contact page
   ========================================================================== */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 0; border-top: 1px solid var(--line); }
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-grid > div { padding: 0 0 0 0; }

.contact-info-card { padding-right: 40px; }
.contact-info-card ul { list-style: none; padding: 0; margin: 22px 0 0; }
.contact-info-card li { padding: 14px 0; border-top: 1px solid var(--line); }
.contact-info-card li:first-child { border-top: none; }
.contact-info-card strong { display: block; font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--signal); margin-bottom: 4px; }

.map-frame { border: 1px solid var(--line); overflow: hidden; margin-top: 24px; }
.map-frame iframe { width: 100%; height: 250px; border: 0; display: block; filter: grayscale(0.4) contrast(1.05); }

.form-card { border-left: 1px solid var(--line); padding-left: 44px; }
@media (max-width: 900px) { .form-card { border-left: none; padding-left: 0; border-top: 1px solid var(--line); padding-top: 40px; margin-top: 40px; } }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink); margin-bottom: 8px; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--ink); padding: 12px 14px;
  font-family: var(--font-body); font-size: 0.95rem; background: #fff; color: var(--ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--signal); outline-offset: 1px; }
.field textarea { resize: vertical; min-height: 120px; }
.form-note { font-size: 0.85rem; color: var(--grey); margin-top: 8px; }

/* ==========================================================================
   Back to top
   ========================================================================== */
.back-to-top {
  position: fixed; bottom: 26px; right: 26px; width: 46px; height: 46px;
  background: var(--signal); color: #fff;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease; z-index: 998;
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--signal-dark); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .back-to-top { transition: none; }
}
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--signal); outline-offset: 2px; }

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }