/* ============================================================
   TENSIGHT CONSULTING — Global Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,600&family=Inter:wght@300;400;500;600&display=swap');

/* --- Design Tokens --- */
:root {
  --black:       #111111;
  --off-black:   #1D1D1D;
  --red:         #C0212B;
  --red-dark:    #9A1A22;
  --white:       #FFFFFF;
  --off-white:   #F7F6F4;
  --grey-light:  #EDECE9;
  --grey-mid:    #9A9893;
  --grey-dark:   #4A4845;

  --font-serif:  'Cormorant Garamond', Georgia, serif;
  --font-sans:   'Inter', system-ui, sans-serif;

  --max-w:       1200px;
  --nav-h:       80px;

  --ease:        cubic-bezier(0.4, 0, 0.2, 1);
  --transition:  0.3s var(--ease);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  color: var(--black);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2.8rem, 6vw, 5.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
h3 { font-size: clamp(1.4rem, 2.5vw, 2rem); }
h4 { font-size: 1.05rem; font-weight: 500; }
p  { font-size: 1rem; color: var(--grey-dark); line-height: 1.75; }

.serif  { font-family: var(--font-serif); }
.italic { font-style: italic; }

.label {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--grey-mid);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}
section { padding: 5rem 0; }

.section-header { margin-bottom: 3rem; }
.section-header .label { display: block; margin-bottom: 1rem; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.85rem 1.75rem;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--black);
  color: var(--white);
  border: 1.5px solid var(--black);
}
.btn-primary:hover {
  background: var(--red);
  border-color: var(--red);
}
.btn-outline {
  background: transparent;
  color: var(--black);
  border: 1.5px solid var(--black);
}
.btn-outline:hover {
  background: var(--black);
  color: var(--white);
}
.btn-arrow::after {
  content: '→';
  transition: transform var(--transition);
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  transition: background var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(255,255,255,0.97);
  box-shadow: 0 1px 0 var(--grey-light);
  backdrop-filter: blur(12px);
}

/* Two-logo swap: dark logo for light nav, white logo for dark nav */
.nav-logo .logo-white { display: none; }
.nav-logo .logo-dark  { display: block; }
.nav:not(.scrolled) .nav-logo .logo-white { display: block; }
.nav:not(.scrolled) .nav-logo .logo-dark  { display: none; }

/* On dark hero: white nav before scroll */
.nav:not(.scrolled) .nav-links a { color: rgba(255,255,255,0.8); }
.nav:not(.scrolled) .nav-links a:hover,
.nav:not(.scrolled) .nav-links a.active { color: var(--white); }
.nav:not(.scrolled) .nav-toggle span { background: var(--white); }

/* Get in touch — always visible, transitions between states */
.nav-cta,
.nav-links a.nav-cta {
  color: var(--white) !important;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.nav:not(.scrolled) .nav-cta {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.7);
}
.nav:not(.scrolled) .nav-cta:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--white);
}

.nav-inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo img { height: 54px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}
.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--black);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1px;
  background: var(--red);
  transition: width var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a:hover,
.nav-links a.active { color: var(--red); }

/* Override red underline on dark nav */
.nav:not(.scrolled) .nav-links a:hover,
.nav:not(.scrolled) .nav-links a.active { color: var(--white); }

.nav-cta {
  font-size: 0.75rem;
  padding: 0.6rem 1.3rem;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--black);
  transition: all var(--transition);
}

/* ============================================================
   PAGE HERO (inner pages)
   ============================================================ */
.page-hero {
  padding: calc(var(--nav-h) + 4rem) 0 4rem;
  background: var(--off-black);
  position: relative;
  overflow: hidden;
}
.page-hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.25;
}
.page-hero .label { display: block; margin-bottom: 1.2rem; color: rgba(255,255,255,0.45); }
.page-hero h1 { color: var(--white); }
.page-hero h1 em { color: var(--red); font-style: italic; }
.page-hero .lead {
  margin-top: 1.5rem;
  font-size: 1.05rem;
  max-width: 540px;
  color: rgba(255,255,255,0.55);
}

/* ============================================================
   DIVIDER
   ============================================================ */
.divider { height: 1px; background: var(--grey-light); }

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--off-black);
  color: var(--white);
  padding: 4rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand .logo-text {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--white);
  display: block;
  margin-bottom: 1rem;
}
.footer-brand p { color: rgba(255,255,255,0.4); font-size: 0.875rem; max-width: 280px; }
.footer-col h5 {
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 1.2rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a { font-size: 0.875rem; color: rgba(255,255,255,0.6); transition: color var(--transition); }
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-bottom p { font-size: 0.78rem; color: rgba(255,255,255,0.3); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    position: fixed;
    top: var(--nav-h); left: 0; right: 0; bottom: 0;
    background: var(--white);
    padding: 2rem;
    z-index: 99;
  }
  .nav-links.open a {
    font-size: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--grey-light);
    width: 100%;
    color: var(--black) !important;
  }
  .nav-links.open .nav-cta {
    margin-top: 1.5rem;
    background: var(--black);
    color: var(--white);
    border: 1.5px solid var(--black);
    padding: 0.8rem 1.5rem;
  }
  .nav-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  section { padding: 4rem 0; }
}
@media (max-width: 600px) {
  .container { padding: 0 1.25rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}