/* =========================================================
   Authority — TaulTech Industry Concept
   Quiet Authority design system
   ========================================================= */

:root {
  /* Color tokens */
  --color-ink: #1B1D1F;
  --color-ink-soft: #4A4D4F;
  --color-ink-faint: #74777A;
  --color-paper: #F8F5EF;
  --color-paper-alt: #EFE9DD;
  --color-surface: #FFFFFF;
  --color-accent: #2F6F62;
  --color-accent-dark: #234F45;
  --color-accent-soft: #E4EEEC;
  --color-line: #DDD5C4;
  --color-line-strong: #C9C0AC;
  --color-modal-note: #F4E9E4;
  --color-focus: #B5541F;

  /* Typography */
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Radius / shadow */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-soft: 0 12px 32px rgba(27, 29, 31, 0.12);
  --shadow-hover: 0 8px 20px rgba(27, 29, 31, 0.10);

  /* Layout */
  --max-width: 1200px;
  --mobile-bar-height: 64px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  width: 100%;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--color-accent); }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; }
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.2;
  margin: 0 0 var(--space-4);
  color: var(--color-ink);
}
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 var(--space-4); color: var(--color-ink-soft); }
.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-3);
  display: block;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-ink);
  color: #fff;
  padding: var(--space-3) var(--space-4);
  z-index: 200;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-4);
}
@media (min-width: 768px) {
  .container { padding: 0 var(--space-6); }
}

section {
  padding: var(--space-8) 0;
}
.section-alt { background: var(--color-paper-alt); }
.section-ink { background: var(--color-ink); color: #fff; }
.section-ink p { color: rgba(255,255,255,0.75); }
.section-ink h2 { color: #fff; }

.section-head {
  max-width: 640px;
  margin: 0 auto var(--space-7);
  text-align: center;
}
.section-head.align-left { margin-left: 0; text-align: left; }

/* ---------- Buttons ---------- */
.auth-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
  min-height: 44px;
}
.auth-btn:active { transform: translateY(1px); }
.auth-btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.auth-btn-primary:hover { background: var(--color-accent-dark); }
.auth-btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-line-strong);
}
.auth-btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }
.auth-btn-ghost {
  background: transparent;
  color: var(--color-accent);
  padding-left: var(--space-2);
  padding-right: var(--space-2);
}
.auth-btn-ghost:hover { color: var(--color-accent-dark); }
.auth-btn-on-dark {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.4);
}
.auth-btn-on-dark:hover { border-color: #fff; }
.auth-btn svg { width: 18px; height: 18px; flex-shrink: 0; }

/* ---------- Concept badge ribbon (persistent identity) ---------- */
.concept-bar {
  background: var(--color-ink);
  color: rgba(255,255,255,0.85);
  font-size: 0.78rem;
  text-align: center;
  padding: var(--space-2) var(--space-4);
  line-height: 1.4;
}
.concept-bar strong { color: #fff; }

/* ---------- Header / Nav ---------- */
header.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-paper);
  border-bottom: 1px solid var(--color-line);
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-ink);
}
.brand-mark { width: 34px; height: 34px; flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}
.brand-sub {
  font-size: 0.68rem;
  color: var(--color-ink-faint);
  letter-spacing: 0.04em;
}

.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-6);
}
.nav-links a {
  color: var(--color-ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--color-accent); }

.nav-actions { display: flex; align-items: center; gap: var(--space-3); min-width: 0; }
.nav-actions .auth-btn-primary { display: none; }
@media (min-width: 1000px) {
  .nav-actions .auth-btn-primary { display: inline-flex; }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; color: var(--color-ink); }

@media (min-width: 1000px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
}

.mobile-menu {
  display: none;
  border-top: 1px solid var(--color-line);
  background: var(--color-paper);
}
.mobile-menu.is-open { display: block; }
.mobile-menu ul { padding: var(--space-4); display: flex; flex-direction: column; gap: var(--space-4); }
.mobile-menu a {
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
}
@media (min-width: 1000px) {
  .mobile-menu { display: none !important; }
}

/* ---------- Hero ---------- */
.hero {
  padding: var(--space-8) 0 var(--space-7);
}
.hero-grid {
  display: grid;
  gap: var(--space-7);
  align-items: center;
}
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1.05fr 0.95fr; }
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-5) 0 var(--space-6);
  min-width: 0;
  max-width: 100%;
}
.hero-art {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(155deg, var(--color-ink) 0%, #2C3E3A 55%, var(--color-accent) 100%);
  aspect-ratio: 4 / 3;
}
.hero-art svg { width: 100%; height: 100%; }

/* ---------- Credential preview ---------- */
.credential-preview {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  background: var(--color-accent-soft);
  border: 1px dashed var(--color-accent);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-size: 0.88rem;
  color: var(--color-ink-soft);
}
.credential-preview svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
  margin-top: 2px;
}
.credential-preview strong { color: var(--color-ink); }
.credential-preview.compact { margin-top: var(--space-5); }

/* ---------- Cards / grids ---------- */
.grid {
  display: grid;
  gap: var(--space-5);
}
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1000px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}
.auth-card:hover { box-shadow: var(--shadow-hover); border-color: var(--color-line-strong); }
.auth-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
}
.auth-card-icon svg { width: 24px; height: 24px; }
.auth-card h3 { margin-bottom: var(--space-2); }
.auth-card p:last-child { margin-bottom: 0; }
.auth-card-note {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: 0.78rem;
  color: var(--color-ink-faint);
  font-style: italic;
}
.auth-card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: var(--space-3);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
}
.auth-card-link svg { width: 16px; height: 16px; }

/* Pillars (Why choose us) */
.pillar { text-align: left; }
.pillar-check {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-3);
}
.pillar-check svg { width: 16px; height: 16px; }

/* Process steps */
.steps {
  display: grid;
  gap: var(--space-6);
  counter-reset: step;
}
@media (min-width: 768px) {
  .steps { grid-template-columns: repeat(4, 1fr); }
}
.step { position: relative; padding-left: var(--space-8); }
@media (min-width: 768px) { .step { padding-left: 0; padding-top: var(--space-8); } }
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0; top: 0;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--color-ink);
  color: #fff;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  display: flex; align-items: center; justify-content: center;
}

/* Team / role cards */
.role-card { text-align: center; }
.role-avatar {
  width: 72px; height: 72px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  background: linear-gradient(155deg, var(--color-accent) 0%, var(--color-ink) 100%);
  display: flex; align-items: center; justify-content: center;
}
.role-avatar svg { width: 30px; height: 30px; color: rgba(255,255,255,0.9); }
.role-card .role-title { font-weight: 600; color: var(--color-ink); margin-bottom: var(--space-1); }
.role-card .role-desc { font-size: 0.88rem; }
.role-note { text-align: center; font-size: 0.78rem; color: var(--color-ink-faint); font-style: italic; margin-top: var(--space-5); }

/* FAQ accordion */
.faq-list { display: flex; flex-direction: column; gap: var(--space-3); max-width: 760px; margin: 0 auto; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  background: none;
  border: none;
  text-align: left;
  padding: var(--space-4) var(--space-5);
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--color-ink);
  cursor: pointer;
}
.faq-question svg {
  width: 20px; height: 20px;
  flex-shrink: 0;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}
.faq-item[data-open="true"] .faq-question svg { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.2s ease;
}
.faq-item[data-open="true"] .faq-answer { max-height: 600px; }
.faq-answer-inner { padding: 0 var(--space-5) var(--space-4); }
.faq-answer-inner p { margin: 0; font-size: 0.92rem; }

/* Trust / credibility section */
.trust-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

/* Service area / map */
.map-panel {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
}
.map-art { background: var(--color-paper-alt); aspect-ratio: 16/9; }
.map-art svg { width: 100%; height: 100%; }
.map-caption { padding: var(--space-5); }

/* Bottom CTA band */
.cta-band { text-align: center; }
.cta-band .auth-btn { margin: 0 var(--space-2); }

/* ---------- Consultation form ---------- */
.consult-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  max-width: 640px;
  margin: 0 auto;
}
.form-field { margin-bottom: var(--space-4); }
.form-field label {
  display: block;
  font-weight: 600;
  font-size: 0.88rem;
  margin-bottom: var(--space-2);
  color: var(--color-ink);
}
.form-field input,
.form-field textarea {
  width: 100%;
  padding: var(--space-3);
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 1rem;
  background: var(--color-paper);
  color: var(--color-ink);
  min-height: 44px;
}
.form-field textarea { min-height: 96px; resize: vertical; }
.form-field input:focus, .form-field textarea:focus {
  outline: 3px solid var(--color-focus);
  outline-offset: 1px;
  border-color: var(--color-focus);
}
.form-error {
  color: var(--color-focus);
  font-size: 0.8rem;
  margin-top: var(--space-1);
  display: none;
}
.form-field.has-error input,
.form-field.has-error textarea { border-color: var(--color-focus); }
.form-field.has-error .form-error { display: block; }
.form-note {
  font-size: 0.8rem;
  color: var(--color-ink-faint);
  margin-top: var(--space-2);
  margin-bottom: 0;
}
.consult-confirm {
  display: none;
  background: var(--color-modal-note);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  text-align: center;
}
.consult-confirm.is-visible { display: block; }
.consult-confirm h3 { margin-bottom: var(--space-2); }
.consult-confirm p { margin-bottom: 0; }
.consult-form.is-hidden { display: none; }

/* ---------- Footer ---------- */
footer.site-footer {
  background: var(--color-ink);
  color: rgba(255,255,255,0.7);
  padding: var(--space-8) 0 var(--space-6);
}
.footer-grid {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
}
.footer-brand .brand-name, .footer-brand .brand-sub { color: #fff; }
.footer-brand .brand-sub { color: rgba(255,255,255,0.55); }
.footer-col h4 {
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--space-2); }
.footer-col a { color: rgba(255,255,255,0.72); text-decoration: none; font-size: 0.92rem; }
.footer-col a:hover { color: #fff; }
.footer-disclaimer {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding-top: var(--space-5);
  font-size: 0.8rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.55);
}
.footer-disclaimer p { color: rgba(255,255,255,0.55); font-size: 0.8rem; }
.footer-bottom {
  margin-top: var(--space-5);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
}

/* ---------- Mobile sticky action bar ---------- */
.mobile-action-bar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 90;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  box-shadow: 0 -8px 24px rgba(27,29,31,0.10);
  transform: translateY(0);
  transition: transform 0.25s ease;
}
.mobile-action-bar.is-hidden { transform: translateY(100%); }
.mobile-action-bar button,
.mobile-action-bar a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  background: none;
  border: none;
  padding: var(--space-2) var(--space-1) var(--space-3);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  cursor: pointer;
  min-height: 44px;
  min-width: 0;
  text-align: center;
  line-height: 1.2;
}
.mobile-action-bar > * + * { border-left: 1px solid var(--color-line); }
.mobile-action-bar svg { width: 20px; height: 20px; color: var(--color-accent); }
@media (min-width: 1000px) {
  .mobile-action-bar { display: none; }
}
body.has-mobile-bar { padding-bottom: var(--mobile-bar-height); }
@media (min-width: 1000px) {
  body.has-mobile-bar { padding-bottom: 0; }
}

/* ---------- Concept Modal ---------- */
.concept-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(27, 29, 31, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  z-index: 200;
}
.concept-modal-overlay.is-open { display: flex; }
.concept-modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  max-width: 420px;
  width: 100%;
  padding: var(--space-6);
  box-shadow: var(--shadow-soft);
  position: relative;
}
.concept-modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  background: var(--color-paper);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.concept-modal-close svg { width: 16px; height: 16px; }
.concept-modal-icon {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-4);
}
.concept-modal-icon svg { width: 22px; height: 22px; }
.concept-modal h3 { margin-bottom: var(--space-3); }
.concept-modal p { margin-bottom: 0; font-size: 0.92rem; }

/* ---------- Breadcrumb (service page) ---------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  color: var(--color-ink-faint);
  margin-bottom: var(--space-5);
}
.breadcrumb a { color: var(--color-ink-faint); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb svg { width: 14px; height: 14px; }

/* ---------- Eligibility list ---------- */
.eligibility-list { display: flex; flex-direction: column; gap: var(--space-3); }
.eligibility-item {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}
.eligibility-item svg { width: 22px; height: 22px; color: var(--color-accent); flex-shrink: 0; margin-top: 1px; }
.eligibility-item p { margin: 0; font-size: 0.92rem; }

/* Two-column layout for service content */
.two-col { display: grid; gap: var(--space-6); }
@media (min-width: 900px) {
  .two-col { grid-template-columns: 1fr 1fr; }
}

.timeline-note {
  background: var(--color-accent-soft);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  font-size: 0.9rem;
}
.timeline-note strong { color: var(--color-ink); }

.materials-list { display: flex; flex-direction: column; gap: var(--space-2); }
.materials-list li {
  display: flex;
  gap: var(--space-2);
  align-items: flex-start;
  font-size: 0.92rem;
  color: var(--color-ink-soft);
}
.materials-list svg { width: 16px; height: 16px; color: var(--color-accent); margin-top: 4px; flex-shrink: 0; }

.related-links { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.related-links a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-ink);
  font-size: 0.9rem;
  font-weight: 500;
}
.related-links a:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* Visually hidden (a11y helper) */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}