/* Nilgiri Advisory - site styles
   Design system tokens are imported unchanged from Claude Design.
   Everything below is the page layer. */

@import url("tokens/fonts.css");
@import url("tokens/colors.css");
@import url("tokens/typography.css");
@import url("tokens/spacing.css");
@import url("tokens/elevation.css");
@import url("tokens/base.css");

/* ---------------------------------------------------------------
   Overrides applied during implementation. Each one is a fix, not
   a preference. See README.
   --------------------------------------------------------------- */
:root {
  /* CTA background. clay-500 gave 4.22:1 against white text, under the
     4.5:1 AA floor for text below 24px. clay-600 gives ~5.7:1. */
  --cta-bg: var(--clay-600);
  --cta-bg-hover: var(--clay-700);

  /* Label face. Was IBM Plex Mono; now a sans, per request. Kept on the same
     token so every consumer picks it up. IBM Plex Sans carries true tabular
     lining figures, so the number alignment the mono was chosen for survives.
     The eyebrow letter-spacing does the differentiating work instead.
     To go back, restore 'IBM Plex Mono' here and re-add its @font-face rules. */
  --font-mono: 'IBM Plex Sans', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

/* Labels set in the sans need their figures pinned explicitly. */
.eyebrow, .code-label, .step-num, .framework-name, .duration-value,
.person-role, .footer-head, .footer-base { font-variant-numeric: tabular-nums lining-nums; }

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 92px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body { margin: 0; overflow-x: hidden; }
img, svg { max-width: 100%; }
p { margin: 0; }
ol, ul { margin: 0; padding: 0; list-style: none; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--surface); color: var(--text-strong);
  padding: var(--space-3) var(--space-5); border: var(--border-thick) solid var(--accent);
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

.container { max-width: var(--container-max); margin: 0 auto; }
.container-text { max-width: 860px; }

.icon { width: 20px; height: 20px; flex: none; }
.icon-lg { width: 28px; height: 28px; }

/* ---------------- Type helpers ---------------- */
.eyebrow {
  font-family: var(--font-mono); font-size: var(--fs-caption);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--accent-text); font-weight: var(--fw-regular);
  display: flex; align-items: center; gap: var(--space-2);
}
/* The hero eyebrow is muted, not accent, and carries the rule. */
.eyebrow-rule { color: var(--text-muted); }
.eyebrow-rule::before {
  content: ""; width: 34px; height: 2px; background: var(--accent); flex: none;
}
.eyebrow-on-dark { color: var(--clay-300); }

/* ---------------- Buttons ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-sans); font-weight: var(--fw-semibold);
  border-radius: var(--radius-md); border: var(--border-hair) solid transparent;
  cursor: pointer; text-decoration: none; border-bottom-color: transparent;
  transition: background-color var(--dur-fast, 140ms) ease, color 140ms ease;
}
.btn-accent { background: var(--cta-bg); color: #fff; }
.btn-accent:hover { background: var(--cta-bg-hover); color: #fff; border-bottom-color: transparent; }
.btn-sm { font-size: var(--fs-body-sm); padding: var(--space-3) var(--space-5); }
.btn-lg { font-size: var(--fs-body-lg); padding: var(--space-4) var(--space-8); }
.btn-block { width: 100%; }
.btn-quiet {
  background: transparent; color: var(--accent-text);
  border: var(--border-hair) solid var(--border-strong);
  font-size: var(--fs-body); padding: var(--space-3) var(--space-6);
}
.btn-quiet:hover { background: var(--surface); }

/* ---------------- Header ---------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  -webkit-backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: var(--border-hair) solid var(--border);
}
.header-inner {
  max-width: var(--container-wide); margin: 0 auto;
  padding: var(--space-4) var(--space-8);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-6);
}
.wordmark {
  display: inline-flex; align-items: baseline; gap: var(--space-2);
  border-bottom: none; color: var(--text-strong);
}
.wordmark-name { font-family: var(--font-display); font-size: var(--fs-h5); font-weight: var(--fw-semibold); letter-spacing: var(--ls-tight); }
/* Was 12px, under the 14px projector floor. */
.wordmark-suffix {
  font-family: var(--font-mono); font-size: var(--fs-caption);
  letter-spacing: var(--ls-label); text-transform: uppercase;
  color: var(--text-muted); font-weight: var(--fw-medium);
}
.wordmark-on-dark { color: var(--stone-25); }
.wordmark-on-dark .wordmark-suffix { color: var(--stone-400); }

.header-right { display: flex; align-items: center; gap: var(--space-8); }
.nav-desktop { display: flex; gap: var(--space-8); }
.nav-desktop a { color: var(--text-muted); font-size: var(--fs-body); letter-spacing: var(--ls-snug); border-bottom: none; }
.nav-desktop a:hover { color: var(--accent-text); }

.menu-toggle, .menu-close {
  display: none; background: none; border: none; cursor: pointer;
  color: var(--text-strong); padding: var(--space-2);
}

/* ---------------- Mobile menu ---------------- */
.mobile-menu {
  position: fixed; inset: 0; z-index: 60; background: var(--bg);
  padding: var(--space-4) var(--space-6) var(--space-10);
  display: flex; flex-direction: column;
}
.mobile-menu[hidden] { display: none; }
.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: var(--space-8); }
.mobile-menu-head .menu-close { display: block; }
.mobile-nav { display: flex; flex-direction: column; gap: var(--space-2); }
.mobile-nav a {
  color: var(--text-strong); font-family: var(--font-display);
  font-size: var(--fs-h4); padding: var(--space-4) 0; border-bottom: var(--border-hair) solid var(--border-faint);
}
.mobile-cta { margin-top: var(--space-10); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(var(--space-16), 9vw, var(--space-32)) var(--space-8) var(--space-24);
}
/* Motif layers, geometry from the design source. */
.hero-motif { position: absolute; inset: 0; pointer-events: none; }
.motif-plot { position: absolute; inset: 0; }
.motif-plot svg { display: block; opacity: 0.28; }
.motif-contour { position: absolute; right: -160px; top: -120px; }
.motif-contour svg { display: block; overflow: visible; opacity: 0.5; }
.hero-inner { position: relative; max-width: var(--container-max); margin: 0 auto; }
.hero h1 {
  font-size: clamp(2.75rem, 6vw, var(--fs-display));
  max-width: 15ch; margin: var(--space-6) 0 var(--space-6);
}
.hero-lead { font-size: var(--fs-body-lg); color: var(--text-body); max-width: 46ch; line-height: var(--lh-normal); }
.hero-qualifier { font-size: var(--fs-body); color: var(--text-muted); max-width: 52ch; margin-top: var(--space-4); line-height: var(--lh-normal); }
.hero-actions { margin-top: var(--space-10); display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-6); }
.hero-proof { display: flex; align-items: center; gap: var(--space-3); color: var(--text-muted); font-size: var(--fs-body); }

/* ---------------- Bands ---------------- */
.band { padding: var(--space-24) var(--space-8); }
.band-sunken { background: var(--bg-sunken); border-top: var(--border-hair) solid var(--border); }
.band-flush { border-top: none; }
.band-dark { background: var(--stone-900); padding: var(--space-20) var(--space-8); }

.section-head { margin-bottom: var(--space-12); }
.section-head h2 { font-size: clamp(2rem, 4vw, var(--fs-h2)); margin-top: var(--space-4); max-width: 20ch; }
.section-lead { margin-top: var(--space-5); color: var(--text-muted); font-size: var(--fs-body); max-width: 62ch; line-height: var(--lh-relaxed); }

/* ---------------- Services ---------------- */
.grid-services { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-6); }
.card {
  background: var(--surface-card); border: var(--border-hair) solid var(--border);
  border-radius: var(--radius-lg); padding: var(--space-8);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}
.card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm, 0 1px 3px rgba(20,23,18,.08)); }
.card-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-6); }
.code-label {
  font-family: var(--font-mono); font-size: var(--fs-caption); letter-spacing: var(--ls-label);
  text-transform: uppercase; color: var(--primary); font-weight: var(--fw-regular);
}
.card h3 { font-size: var(--fs-h5); margin-bottom: var(--space-3); }
.card p { color: var(--text-muted); line-height: var(--lh-relaxed); }

/* ---------------- Approach ---------------- */
.grid-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-10); }
.step-top { display: flex; align-items: center; justify-content: space-between; }
.step-num { font-family: var(--font-mono); font-size: var(--fs-h4); color: var(--accent); font-weight: var(--fw-regular); letter-spacing: var(--ls-tight); }
.step-rule { height: 2px; background: var(--border); margin: var(--space-5) 0 var(--space-6); }
.step h3 { font-size: var(--fs-h5); margin-bottom: var(--space-3); }
.step p { color: var(--text-muted); line-height: var(--lh-relaxed); }

/* ---------------- People ---------------- */
.grid-people { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); }
.person {
  background: var(--surface-card); border: var(--border-hair) solid var(--border);
  border-radius: var(--radius-lg); padding: var(--space-8);
  display: flex; flex-direction: column; gap: var(--space-5);
}
.monogram {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: var(--primary-soft); border: var(--border-hair) solid var(--primary-border);
  color: var(--primary); font-family: var(--font-mono); font-weight: var(--fw-semibold);
  font-size: var(--fs-h5); letter-spacing: var(--ls-tight);
  display: flex; align-items: center; justify-content: center;
}
.person h3 { font-size: var(--fs-h5); }
.person-role {
  font-family: var(--font-mono); font-size: var(--fs-body-sm); letter-spacing: var(--ls-snug);
  color: var(--accent-text); font-weight: var(--fw-regular); margin-top: var(--space-2);
}
.person > p:last-child { color: var(--text-muted); line-height: var(--lh-relaxed); }

/* ---------------- Frameworks (dark) ---------------- */
.grid-frameworks {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--space-6); margin: var(--space-10) 0;
}
.framework { border-top: var(--border-hair) solid var(--stone-700); padding-top: var(--space-5); }
.framework-name { font-family: var(--font-mono); font-size: var(--fs-body-lg); color: var(--stone-25); font-weight: var(--fw-regular); }
.framework-note { font-size: var(--fs-body); color: var(--stone-400); margin-top: var(--space-2); line-height: var(--lh-normal); }
.frameworks-note { color: var(--stone-300); font-size: var(--fs-body); max-width: 62ch; line-height: var(--lh-relaxed); }

/* ---------------- Working with us ---------------- */
.grid-durations { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); }
.duration {
  background: var(--surface-card); border: var(--border-hair) solid var(--border);
  border-radius: var(--radius-lg); padding: var(--space-8);
}
/* Label is the heading here, duration is the small accent line under it.
   I had these inverted; this matches the design source. */
.duration-label {
  font-family: var(--font-display); font-size: var(--fs-h5); font-weight: var(--fw-semibold);
  color: var(--text-strong); line-height: var(--lh-tight); margin-top: var(--space-5);
}
.duration-value {
  font-family: var(--font-mono); font-size: var(--fs-body); font-weight: var(--fw-regular);
  color: var(--accent-text); letter-spacing: var(--ls-snug); margin-top: var(--space-2);
}

/* ---------------- FAQ ---------------- */
.faq-list { border-top: var(--border-hair) solid var(--border); }
.faq-item { border-bottom: var(--border-hair) solid var(--border); }
.faq-q {
  width: 100%; background: none; border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-6);
  padding: var(--space-6) 0; text-align: left;
  font-family: var(--font-display); font-size: var(--fs-h5); font-weight: var(--fw-semibold);
  color: var(--text-strong); line-height: var(--lh-snug);
}
.faq-q:hover { color: var(--accent-text); }
.faq-chevron { color: var(--text-muted); display: flex; transition: transform 160ms ease; }
.faq-q[aria-expanded="true"] .faq-chevron { transform: rotate(180deg); }
.faq-a { padding-bottom: var(--space-6); }
.faq-a[hidden] { display: none; }
.faq-a p { color: var(--text-muted); line-height: var(--lh-relaxed); max-width: 68ch; }

/* ---------------- Enquiry form ---------------- */
.enquiry-form {
  background: var(--surface-card); border: var(--border-hair) solid var(--border);
  border-top: 3px solid var(--accent); border-radius: var(--radius-lg);
  padding: var(--space-10); display: flex; flex-direction: column; gap: var(--space-6);
}
/* An author `display` beats the UA stylesheet's rule for [hidden], so any
   element given display here needs its own [hidden] guard or it never hides. */
.enquiry-form[hidden] { display: none; }
.form-error {
  display: flex; align-items: center; gap: var(--space-3);
  background: var(--danger-soft); color: var(--danger);
  border-radius: var(--radius-md); padding: var(--space-4) var(--space-5);
  font-size: var(--fs-body);
}
.form-error[hidden] { display: none; }
.field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-6); }
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field label { font-size: var(--fs-body-sm); font-weight: var(--fw-medium); color: var(--text-strong); }
.req { color: var(--accent-text); }
.opt { color: var(--text-faint); font-weight: var(--fw-regular); }
.field input, .field textarea {
  font-family: var(--font-sans); font-size: var(--fs-body); color: var(--text-body);
  background: var(--surface); border: var(--border-hair) solid var(--border-strong);
  border-radius: var(--radius-md); padding: var(--space-4) var(--space-5);
  width: 100%; line-height: var(--lh-normal);
}
.field textarea { resize: vertical; min-height: 8rem; }
.field input::placeholder, .field textarea::placeholder { color: var(--text-faint); }
.field input:focus-visible, .field textarea:focus-visible { outline: var(--border-thick) solid var(--focus-ring); outline-offset: 1px; border-color: var(--accent); }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--danger); }
.field-error { color: var(--danger); font-size: var(--fs-body-sm); }
.field-error[hidden] { display: none; }
.form-note { color: var(--text-muted); font-size: var(--fs-body-sm); line-height: var(--lh-relaxed); }
/* Honeypot. Off-screen rather than display:none, which some bots skip. */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form-success {
  background: var(--surface-card); border: var(--border-hair) solid var(--border);
  border-top: 3px solid var(--success); border-radius: var(--radius-lg);
  padding: var(--space-12) var(--space-10); text-align: left;
  display: flex; flex-direction: column; align-items: flex-start; gap: var(--space-4);
}
.form-success[hidden] { display: none; }
.form-success h3 { font-size: var(--fs-h4); }
.form-success p { color: var(--text-muted); line-height: var(--lh-relaxed); max-width: 60ch; }
.form-success .btn { margin-top: var(--space-4); }

/* ---------------- Footer ---------------- */
.site-footer { background: var(--stone-950); padding: var(--space-20) var(--space-8) var(--space-10); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: var(--space-12); }
.footer-brand p { color: var(--stone-300); margin-top: var(--space-5); max-width: 42ch; line-height: var(--lh-relaxed); }
.footer-head {
  font-family: var(--font-mono); font-size: var(--fs-caption); letter-spacing: var(--ls-label);
  text-transform: uppercase; color: var(--stone-400); margin-bottom: var(--space-5);
}
.footer-link { display: flex; align-items: center; gap: var(--space-2); color: var(--stone-25); font-size: var(--fs-body); border-bottom: none; margin-bottom: var(--space-4); }
.footer-link:hover { color: var(--clay-300); }
.footer-link:hover .footer-icon { color: var(--clay-300); }
.footer-meta { display: flex; align-items: center; gap: var(--space-2); color: var(--stone-300); font-size: var(--fs-body); }
/* One colour for all three contact icons, set in one place. */
.footer-icon { color: var(--clay-300); }
.footer-nav { display: flex; flex-direction: column; gap: var(--space-3); }
.footer-nav a { color: var(--stone-200); font-size: var(--fs-body); border-bottom: none; }
.footer-nav a:hover { color: var(--stone-25); }
.footer-base {
  display: flex; justify-content: center; gap: var(--space-6); flex-wrap: wrap;
  padding-top: var(--space-8);
  font-size: var(--fs-body-sm); color: var(--stone-400);
}
.footer-base span { font-family: var(--font-mono); }

/* ---------------- Responsive ---------------- */
@media (max-width: 1080px) {
  .grid-services { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid-frameworks { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav-desktop, .header-right .btn { display: none; }
  .menu-toggle { display: block; }
  .hero { padding: var(--space-20) var(--space-6) var(--space-16); }
  .hero-motif { display: none; }
  .band { padding: var(--space-16) var(--space-6); }
  .band-dark { padding: var(--space-16) var(--space-6); }
  .grid-services, .grid-steps, .grid-people, .grid-durations { grid-template-columns: minmax(0, 1fr); }
  .grid-frameworks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .field-row { grid-template-columns: minmax(0, 1fr); }
  .enquiry-form { padding: var(--space-6); }
  .footer-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-10); }
  .site-footer { padding: var(--space-16) var(--space-6) var(--space-8); }
}
@media (max-width: 520px) {
  .grid-frameworks { grid-template-columns: minmax(0, 1fr); }
}