/* ==========================================================
   Thacherys Business Consultancy — landing page
   Layout: left-aligned editorial column on a cool paper ground, photography
   in full-bleed ink-navy bands; services as an index of practice areas.
   ========================================================== */

:root {
  /* Colour */
  --paper: #f6f7f6;        /* page ground */
  --white: #ffffff;        /* lifted sections */
  --mist: #eceff0;         /* tag / tile fill */
  --ink: #142230;          /* headings, primary actions, dark bands */
  --ink-2: #2f3b48;        /* body text */
  --muted: #64707c;        /* secondary text */
  --line: #d9dee2;         /* hairlines */
  --amber: #b9773a;        /* accent: rules, highlights */
  --amber-2: #e2ab6e;      /* accent on dark */
  --night: #0f1922;        /* dark band base */
  --on-dark: #f2f4f5;
  --on-dark-2: #c3ccd3;

  /* Type: one family, one scale. Every size on the page is one of these. */
  --font: "Hanken Grotesk", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --t-label: 13px;   /* uppercase labels and eyebrows */
  --t-ui: 15px;      /* interface only: nav, buttons, tags, footer links */
  --t-body: 18px;    /* ALL running text: intros, paragraphs, bios */
  --t-h3: 28px;      /* card and row titles */
  --t-quote: clamp(28px, 3vw, 40px);
  --t-h2: clamp(40px, 5vw, 66px);
  --t-h1: clamp(48px, 6.2vw, 88px);

  /* Space (8px rhythm) */
  --s-1: 8px;
  --s-2: 16px;
  --s-3: 24px;
  --s-4: 32px;
  --s-5: 48px;
  --s-6: 64px;
  --s-7: 96px;
  --section: clamp(104px, 11vw, 160px);

  --container: 1240px;
  --gutter: clamp(20px, 5vw, 72px);
  --header-h: 96px;
  --radius: 4px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 88px; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink-2);
  font-family: var(--font);
  font-size: var(--t-body);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
p { margin: 0; }
h1, h2, h3 {
  font-family: var(--font);
  color: var(--ink);
  margin: 0;
  text-wrap: balance;
}
h1, h2 { font-weight: 300; letter-spacing: -0.025em; }
h2 { font-size: var(--t-h2); line-height: 1.08; }
h3 { font-size: var(--t-h3); font-weight: 500; line-height: 1.3; letter-spacing: -0.01em; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

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

/* ---------- Shared ---------- */

.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1.4;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: var(--s-3);
}
.eyebrow::before {
  content: "";
  width: 40px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.section-intro {
  font-size: var(--t-body);
  line-height: 1.75;
  color: var(--ink-2);
  max-width: 34em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 30px;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--white);
  font-size: var(--t-ui);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.4;
  text-decoration: none;
  transition: background .2s ease, transform .2s ease;
}
.btn:hover { background: #22364a; transform: translateY(-1px); }
.btn span { transition: transform .2s ease; }
.btn:hover span { transform: translateX(4px); }
.btn-sm { padding: 12px 22px; }
.btn-gold { background: var(--amber-2); color: var(--night); }
.btn-gold:hover { background: #ecbd88; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--t-ui);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  padding-block: 6px;
  border-bottom: 1px solid var(--amber);
}
.link-arrow::after { content: "\2192"; transition: transform .2s ease; }
.link-arrow:hover::after { transform: translateX(4px); }

/* ---------- Logo ---------- */

.logo { display: inline-block; text-decoration: none; color: var(--ink); line-height: 0; }
.logo-mark { width: 184px; height: auto; overflow: visible; }
.logo-name {
  font-family: var(--font);
  font-size: 28px;
  font-weight: 500;
  fill: currentColor;
}
.logo-tag {
  font-family: var(--font);
  font-size: 9px;
  font-weight: 500;
  fill: var(--muted);
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 30;
  padding-top: env(safe-area-inset-top, 0px);
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled {
  background: rgba(246, 247, 246, .94);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: height .3s ease;
}
.site-header.scrolled .header-inner { height: 76px; }

.site-nav { display: flex; align-items: center; gap: var(--s-5); }
.site-nav a:not(.btn) {
  font-size: var(--t-ui);
  font-weight: 500;
  text-decoration: none;
  color: var(--ink);
  position: relative;
}
.site-nav a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--amber);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.site-nav a:not(.btn):hover::after { transform: scaleX(1); }

.nav-toggle { display: none; }

/* ---------- Hero ---------- */

/* Two columns: text left, photo right. Sized so the whole hero, buttons
   included, fits in one desktop screen. */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: clamp(560px, calc(100vh - 96px), 760px);
  padding: calc(var(--header-h) + var(--s-3)) 0 var(--s-6);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
}
.hero-content { min-width: 0; padding-right: var(--s-6); }
.hero .eyebrow { margin-bottom: var(--s-3); }
.hero .eyebrow::before { display: none; }
.hero h1 {
  font-size: clamp(44px, 4.8vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.035em;
}
.hero .lead {
  margin-top: var(--s-4);
  font-size: var(--t-body);
  line-height: 1.75;
  color: var(--ink-2);
  max-width: 34em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3) var(--s-5);
  margin-top: var(--s-5);
}
/* Photo bleeds to the top, right and bottom edges of the hero */
.hero-media {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 48%;
  overflow: hidden;
  background: var(--mist);
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 42% 30%;
}

/* ---------- Track record strip ---------- */

.track {
  background: var(--white);
  border-block: 1px solid var(--line);
}
.track-inner {
  display: flex;
  align-items: center;
  gap: var(--s-3) var(--s-6);
  padding-block: var(--s-5);
}
.track-label {
  flex: none;
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  max-width: 15em;
  line-height: 1.6;
}
.track-list {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s-2) var(--s-5);
}
.track-list li {
  font-size: var(--t-body);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink);
  opacity: .7;
  white-space: nowrap;
}

/* ---------- Services ---------- */

.services { padding-top: var(--section); padding-bottom: var(--s-6); }
.services-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--s-7);
  align-items: start;
}
.services-intro {
  position: sticky;
  top: 136px;
}
.services-intro h2 { margin-bottom: var(--s-4); }
.services-intro .section-intro { margin-bottom: var(--s-5); }

.service-list { border-top: 1px solid var(--line); }
.service {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: var(--s-4);
  padding: var(--s-5) var(--s-3) var(--s-5) 0;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background .25s ease, padding .25s ease;
}
.service::before {
  content: "";
  position: absolute;
  left: 0; top: -1px; bottom: -1px;
  width: 2px;
  background: var(--amber);
  transform: scaleY(0);
  transition: transform .25s ease;
}
.service:hover { background: var(--white); padding-left: var(--s-3); }
.service:hover::before { transform: scaleY(1); }

.service-icon {
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--mist);
  transition: background .25s ease;
}
.service:hover .service-icon { background: var(--ink); }
.service-icon svg {
  width: 30px;
  height: 30px;
  fill: none;
  stroke: var(--ink);
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;
  transition: stroke .25s ease;
}
.service:hover .service-icon svg { stroke: var(--amber-2); }

.service h3 { margin: 2px 0 var(--s-3); }
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tags li {
  font-size: var(--t-ui);
  line-height: 1;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: var(--white);
  color: var(--ink-2);
}

/* ---------- Dark bands (philosophy / connect) ---------- */

.band {
  position: relative;
  color: var(--on-dark);
  overflow: hidden;
  isolation: isolate;
  background: var(--night);
}
.band-bg { position: absolute; inset: 0; z-index: -1; }
.band-bg img { width: 100%; height: 100%; object-fit: cover; }
.band-bg::after { content: ""; position: absolute; inset: 0; }
.band-inner { padding-block: var(--section); }
.band .eyebrow { color: var(--amber-2); }
.band h2 { color: var(--white); }
.band-copy {
  font-size: var(--t-body);
  line-height: 1.8;
  color: var(--on-dark-2);
  max-width: 34em;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: var(--s-7);
}
.philosophy h2 { margin-bottom: var(--s-4); }
.philosophy .band-bg::after {
  background: linear-gradient(90deg, rgba(13,23,32,.92) 0%, rgba(13,23,32,.78) 50%, rgba(13,23,32,.55) 100%);
}
.philosophy .band-bg img { object-position: center 70%; }

.pull-quote {
  margin: 0;
  padding: var(--s-1) 0 var(--s-1) var(--s-5);
  border-left: 1px solid rgba(226, 171, 110, .6);
}
.pull-quote p {
  font-size: var(--t-quote);
  font-weight: 300;
  font-style: italic;
  line-height: 1.4;
  letter-spacing: -0.015em;
  color: var(--white);
  max-width: 16em;
  text-wrap: balance;
}

.connect .band-bg::after {
  background: linear-gradient(90deg, rgba(13,21,29,.9) 0%, rgba(13,21,29,.66) 50%, rgba(13,21,29,.25) 100%);
}
.connect .band-bg img { object-position: center 55%; }
.connect h2 { margin-bottom: var(--s-4); max-width: 13em; }
.connect-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-3) var(--s-4);
  margin-top: var(--s-6);
}
.connect-email { font-size: var(--t-body); color: var(--on-dark-2); }
.connect-email a { color: var(--white); text-underline-offset: 4px; text-decoration-color: var(--amber-2); }

/* ---------- Partners ---------- */

.partners { padding-block: var(--section); background: var(--white); }
.section-head { margin-bottom: var(--s-7); }
.section-head h2 { margin-bottom: var(--s-3); }
.section-head .section-intro { max-width: none; }
.section-head .section-intro + .section-intro { margin-top: var(--s-2); }

.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s-7) var(--s-5);
}
.partner { display: flex; flex-direction: column; min-width: 0; }

.partner-photo {
  display: block;
  aspect-ratio: 1 / 1;
  max-width: 100%;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--mist);
  margin-bottom: var(--s-4);
}
.partner-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center var(--focus, 50%);
  filter: saturate(.9);
  transition: transform .6s ease, filter .6s ease;
}
.partner:hover .partner-photo img { transform: scale(1.035); filter: saturate(1); }

.bio {
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--line);
  font-size: var(--t-body);
  line-height: 1.75;
  color: var(--ink-2);
  flex: 1;
}
.linkedin {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: var(--s-1);
  margin-top: var(--s-4);
  font-size: var(--t-ui);
  font-weight: 500;
  line-height: 1.2;
  color: var(--ink);
  text-decoration: none;
  padding: 10px 16px 10px 14px;
  border: 1px solid var(--line);
  border-radius: 100px;
  transition: border-color .2s ease, background .2s ease, color .2s ease;
}
.linkedin svg { width: 15px; height: 15px; fill: var(--ink); transition: fill .2s ease; }
.linkedin:hover { background: var(--ink); border-color: var(--ink); color: var(--white); }
.linkedin:hover svg { fill: var(--white); }

/* ---------- Footer ---------- */

.site-footer { background: var(--paper); border-top: 1px solid var(--line); }
.footer-inner {
  display: flex;
  align-items: center;
  gap: var(--s-4) var(--s-6);
  padding-block: var(--s-6);
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2) var(--s-5);
  margin-left: auto;
}
.footer-nav a { font-size: var(--t-ui); font-weight: 500; text-decoration: none; color: var(--ink); }
.footer-nav a:hover { text-decoration: underline; text-decoration-color: var(--amber); text-underline-offset: 6px; }
.copyright {
  font-size: var(--t-ui);
  color: var(--muted);
  padding-left: var(--s-6);
  border-left: 1px solid var(--line);
  max-width: 17em;
  line-height: 1.6;
}

/* ==========================================================
   Responsive
   ========================================================== */

@media (max-width: 1180px) {
  .site-nav { gap: var(--s-4); }
  .partner-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-7) var(--s-6); }
  .track-inner { flex-direction: column; align-items: flex-start; }
  .track-label { max-width: none; }
  .track-list { justify-content: flex-start; gap: var(--s-2) var(--s-5); }
  .footer-inner { flex-wrap: wrap; }
  .copyright { width: 100%; max-width: none; padding-left: 0; border-left: 0; }
}

@media (max-width: 960px) {
  .services-layout { grid-template-columns: 1fr; gap: var(--s-6); }
  .services-intro { position: static; }
  .hero { display: block; min-height: 0; padding-bottom: 0; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--s-5); }
  .hero-content { padding-right: 0; }
  .hero-media {
    position: relative;
    width: auto;
    height: 460px;
    margin-inline: calc(var(--gutter) * -1);
  }
  .philosophy-grid { grid-template-columns: 1fr; gap: var(--s-6); }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0 10px;
    border: 0;
    background: transparent;
    cursor: pointer;
    position: relative;
    z-index: 2;
  }
  .nav-toggle span {
    display: block;
    height: 1.5px;
    background: var(--ink);
    transition: transform .25s ease, opacity .2s ease;
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

  .site-nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: var(--s-4);
    background: var(--paper);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s;
  }
  .site-nav.open { opacity: 1; visibility: visible; }
  .site-nav a:not(.btn) { font-size: var(--t-h3); font-weight: 400; }
  .site-nav .btn { margin-top: var(--s-2); }
  body.nav-open { overflow: hidden; }
  body.nav-open .logo { position: relative; z-index: 2; }
  body.nav-open .site-header { background: transparent; backdrop-filter: none; -webkit-backdrop-filter: none; box-shadow: none; }
}

@media (max-width: 760px) {
  :root {
    --header-h: 80px;
    --t-body: 17px;
    --t-h3: 24px;
    --section: 96px;
  }
  .services { padding-bottom: var(--s-5); }
  .logo-mark { width: 156px; }
  .hero { padding-top: calc(var(--header-h) + var(--s-4)); }
  .hero-media { height: 420px; }

  .service { grid-template-columns: 52px minmax(0, 1fr); gap: var(--s-3); padding: var(--s-5) 0; }
  .service:hover { padding-left: 0; background: transparent; }
  .service::before { display: none; }
  .service-icon { width: 52px; height: 52px; }
  .service-icon svg { width: 26px; height: 26px; }

  .section-head { margin-bottom: var(--s-6); }
}

@media (max-width: 600px) {
  .partner-grid { grid-template-columns: 1fr; gap: 0; }
  .partner {
    display: grid;
    grid-template-columns: 112px minmax(0, 1fr);
    column-gap: var(--s-3);
    align-items: center;
    padding-block: var(--s-5);
    border-top: 1px solid var(--line);
  }
  .partner:first-child { border-top: 0; padding-top: 0; }
  .partner-photo { margin: 0; }
  .partner .bio,
  .partner .linkedin { grid-column: 1 / -1; }
  .partner .linkedin { justify-self: start; }

  .connect .band-bg::after { background: rgba(13,21,29,.72); }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: var(--s-4); }
  .footer-nav { margin-left: 0; gap: var(--s-2) var(--s-4); }
}