/* ============================================================
   Corsario Consulting — styles.css
   Implements the "Horse Hair" design system (Context/DESIGN_SYSTEM.md).
   All component code references tokens — never raw hex.
   ============================================================ */

:root {
  /* --- Palette: "Horse Hair" --- */
  --color-50:  #FBF9F2;
  --color-100: #F7F4E8;
  --color-200: #E2DACB;
  --color-300: #C8B697;
  --color-400: #BEA06D;
  --color-500: #9D7B42;
  --color-600: #806536;
  --color-700: #6B5230;
  --color-800: #5E513A;
  --color-900: #43392A;
  --color-950: #2F2D29;

  /* --- Semantic roles --- */
  /* Dark mode — warm near-black canvas */
  --bg-primary:    var(--color-950);  /* page canvas */
  --bg-secondary:  var(--color-900);
  --bg-dark:       var(--color-950);
  --bg-band:       var(--color-800);  /* lighter warm band (contact CTA) */

  --text-primary:  var(--color-50);   /* headings on dark */
  --text-body:     var(--color-200);  /* body copy on dark */
  --text-muted:    var(--color-400);  /* captions, meta */
  --text-inverse:  var(--color-50);   /* light text on dark / gold surfaces */
  --text-on-light: var(--color-950);  /* dark text on light buttons */

  --accent:        var(--color-500);
  --accent-hover:  var(--color-600);
  --accent-subtle: var(--color-300);

  --border-light:  rgba(226, 218, 203, 0.12);
  --border-mid:    rgba(226, 218, 203, 0.22);
  --border-strong: rgba(226, 218, 203, 0.40);

  /* --- Type --- */
  --font-display: 'Canela Text', 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Assistant', 'Helvetica Neue', system-ui, sans-serif;

  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;
  --text-5xl:  4rem;
  --text-6xl:  5.5rem;

  /* Fluid display sizes (clamp between mobile and the tokens above) */
  --fs-hero: clamp(1.9rem, 1.4rem + 2.3vw, 2.375rem);
  --fs-h2:   clamp(2rem, 1.5rem + 2.2vw, var(--text-3xl));
  --fs-h3:   clamp(1.5rem, 1.3rem + 0.9vw, var(--text-2xl));
  --fs-lead: clamp(1.05rem, 1rem + 0.4vw, var(--text-lg));

  /* --- Spacing (4px base) --- */
  --space-1: 4px;   --space-2: 8px;   --space-3: 12px;  --space-4: 16px;
  --space-5: 20px;  --space-6: 24px;  --space-8: 32px;  --space-10: 40px;
  --space-12: 48px; --space-16: 64px; --space-20: 80px; --space-24: 96px;
  --space-32: 128px; --space-40: 160px;

  /* --- Layout --- */
  --content-max:    1280px;
  --content-narrow: 720px;

  /* --- Radius --- */
  --radius-sm: 4px;  --radius-md: 8px;  --radius-lg: 16px;  --radius-full: 9999px;

  /* --- Shadow (warm, from --color-950) --- */
  --shadow-sm: 0 1px 3px rgba(47, 45, 41, 0.08);
  --shadow-md: 0 4px 16px rgba(47, 45, 41, 0.10);
  --shadow-lg: 0 12px 40px rgba(47, 45, 41, 0.14);
  --shadow-xl: 0 24px 64px rgba(47, 45, 41, 0.18);

  /* --- Motion --- */
  --duration-fast: 150ms;  --duration-base: 250ms;
  --duration-slow: 400ms;  --duration-slower: 700ms;
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-inout: cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset / base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg-primary);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

::selection { background: var(--accent); color: var(--text-inverse); }

.wrap {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  position: relative;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--text-inverse);
  padding: var(--space-3) var(--space-4); font-weight: 600;
}
.skip-link:focus { left: 0; }

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

/* --- Display headings --- */
.section__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-h2);
  line-height: 1.12;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  max-width: 20ch;
}

.section__lead {
  font-size: var(--fs-lead);
  font-weight: 300;
  color: var(--text-body);
  max-width: 56ch;
  margin-top: var(--space-5);
  line-height: 1.55;
}

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

/* --- Buttons (uppercase, letterspaced, per system) --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out),
              transform var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
}
.btn--primary { background: var(--accent); color: var(--text-inverse); }
.btn--primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn--lg { padding: var(--space-5) var(--space-12); }

/* Light/cream button — used on the warm contact band */
.btn--light { background: var(--color-50); color: var(--text-on-light); }
.btn--light:hover { background: var(--color-200); transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* Ghost on dark imagery / dark sections */
.btn--ghost-light { background: transparent; color: var(--text-inverse); border-color: rgba(251, 249, 242, 0.4); }
.btn--ghost-light:hover { border-color: var(--text-inverse); background: rgba(251, 249, 242, 0.08); }

/* ============ NAV ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--duration-slow) var(--ease-out),
              border-color var(--duration-slow) var(--ease-out);
}
.nav.is-stuck {
  background: var(--bg-primary);
  border-bottom-color: var(--border-light);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: var(--space-5);
}
.nav__logo { height: 56px; width: auto; }
.nav__links { display: flex; align-items: center; gap: clamp(var(--space-5), 3vw, var(--space-10)); }
.nav__links a {
  font-size: var(--text-sm); font-weight: 600;
  letter-spacing: 0.04em; color: var(--text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}
.nav__links a:hover { color: var(--accent); }
.nav__cta {
  border: 1px solid var(--border-strong);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-sm);
  text-transform: uppercase; letter-spacing: 0.08em; font-size: var(--text-xs) !important;
  transition: background var(--duration-fast) var(--ease-out), color var(--duration-fast) var(--ease-out);
}
.nav__cta:hover { background: var(--accent); color: var(--text-inverse) !important; }

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; align-items: center;
  padding-block: var(--space-32) var(--space-20);
  overflow: hidden;
  background: var(--bg-dark);
}
.hero__media { position: absolute; inset: 0; z-index: 0; }
.hero__img {
  position: absolute; inset: -12% 0 auto 0;
  width: 100%; height: 124%; object-fit: cover;
  will-change: transform;
}
.hero__scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(47,45,41,0.80) 0%, rgba(47,45,41,0.45) 42%, rgba(47,45,41,0.10) 70%, transparent 100%),
    linear-gradient(180deg, rgba(47,45,41,0.45) 0%, rgba(47,45,41,0.12) 22%, rgba(47,45,41,0.12) 52%, var(--color-950) 100%);
}
.hero__inner { width: 100%; z-index: 1; }
.hero__card {
  max-width: 800px;
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  background: rgba(47, 45, 41, 0.55);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border: 1px solid rgba(200, 182, 151, 0.18);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}
.hero__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-hero);
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--text-inverse);
}
.hero__title-accent {
  display: block;
}
.hero__lead {
  margin-top: var(--space-6);
  font-size: var(--fs-lead);
  font-weight: 300;
  line-height: 1.6;
  color: var(--color-200);
  max-width: 46ch;
}
.hero__actions {
  margin-top: var(--space-10);
  display: flex; flex-wrap: wrap; gap: var(--space-4);
}
/* Desktop/tablet: keep each headline sentence on a single line,
   and let the card hug the headline width. */
@media (min-width: 768px) {
  .hero__title { white-space: nowrap; }
  .hero__card { width: fit-content; }
}

/* ============ SERVICES ============ */
.services { padding-block: var(--space-32); background: var(--bg-primary); }
.services__head { max-width: var(--content-narrow); }
.pillars {
  list-style: none;
  margin-top: var(--space-16);
  background: rgba(226, 218, 203, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-8), 3vw, var(--space-16));
  display: grid; gap: var(--space-12);
  grid-template-columns: repeat(3, 1fr);
}
.pillar { position: relative; }
.pillar:not(:last-child)::after {
  content: ""; position: absolute; top: 4px; bottom: 4px; right: calc(var(--space-12) / -2);
  width: 1px; background: rgba(200, 182, 151, 0.16);
}
.pillar__icon { display: block; color: var(--accent); }
.pillar__icon svg { width: 30px; height: 30px; }
.pillar__num {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  color: var(--color-400);
  letter-spacing: 0.1em;
  margin-top: var(--space-4);
}
.pillar__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--fs-h3);
  color: var(--text-inverse);
  letter-spacing: -0.01em;
  margin-top: var(--space-2);
}
.pillar__body {
  margin-top: var(--space-4);
  color: var(--color-200);
  font-weight: 300;
  line-height: 1.6;
}

/* ============ INDUSTRY CATEGORIES (auto marquee) ============ */
.categories {
  background: var(--color-950);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding-block: var(--space-8);
  overflow: hidden;
}
.categories__viewport { display: flex; justify-content: center; overflow: hidden; }
.categories__track {
  display: flex; width: max-content;
  animation: marquee 38s linear infinite;
}
/* Soft fade at both edges so items enter/exit gracefully */
.categories {
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.categories__track:hover { animation-play-state: paused; }
.categories__group {
  list-style: none; display: flex; align-items: center; flex-shrink: 0;
}
.category {
  display: inline-flex; align-items: center; gap: var(--space-3);
  margin-inline: var(--space-8);
  color: var(--text-body);
  font-size: var(--text-sm); font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  white-space: nowrap;
}
.category svg { width: 26px; height: 26px; color: var(--accent); flex-shrink: 0; }

@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ============ CLIENTS ============ */
.clients { background: var(--color-950); padding-block: var(--space-32); }
.clients .eyebrow { display: block; margin-bottom: var(--space-4); }
.clients__title {
  font-family: var(--font-display);
  font-weight: 500; font-size: var(--fs-h3); line-height: 1.2;
  letter-spacing: -0.01em; color: var(--text-primary); max-width: 24ch;
}
.clients__grid {
  list-style: none; margin-top: var(--space-12);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6);
}
.client-logo {
  display: flex; align-items: center; justify-content: center;
  min-height: 116px; padding: var(--space-6);
  border: 1px solid var(--border-light); border-radius: var(--radius-md);
  background: rgba(226, 218, 203, 0.02);
  text-align: center;
}
.client-logo span {
  font-size: var(--text-sm); letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-muted); opacity: 0.55;
}
.client-logo--named {
  font-family: var(--font-display); font-weight: 500; font-size: var(--text-xl);
  color: var(--text-primary);
}

/* ============ PHILOSOPHY ============ */
.philosophy {
  padding-block: var(--space-32);
  background: var(--color-950);
  border-top: 1px solid var(--border-light);
  overflow: hidden;
}
.philosophy__inner {
  display: grid; gap: var(--space-12);
  grid-template-columns: 1.05fr 0.95fr; align-items: center;
}
.philosophy .eyebrow { display: block; margin-bottom: var(--space-5); }
.philosophy__intro {
  font-size: var(--fs-lead); font-weight: 300; line-height: 1.5;
  color: var(--text-body); max-width: 30rem;
}
.philosophy__quote {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.85rem); line-height: 1.36;
  letter-spacing: -0.01em; color: var(--color-400);
  margin-top: var(--space-8); max-width: 30rem;
}
.philosophy__portrait {
  position: relative; min-height: 340px;
  display: flex; align-items: center; justify-content: center;
}
.philosophy__img { width: 100%; max-width: 440px; height: auto; }
.philosophy__placeholder { display: none; }
.philosophy__portrait.is-empty {
  border: 1px dashed var(--border-mid); border-radius: var(--radius-lg);
  background: rgba(226, 218, 203, 0.03);
}
.philosophy__portrait.is-empty .philosophy__placeholder {
  display: flex; align-items: center; justify-content: center; padding: var(--space-10);
}
.philosophy__portrait.is-empty .philosophy__placeholder img { width: 64px; height: 64px; opacity: 0.35; }

/* ============ CONTACT ============ */
.contact {
  padding-block: var(--space-32); text-align: center;
  background: var(--bg-band);
  border-top: 1px solid var(--border-light);
}
.contact__inner { max-width: 36rem; margin-inline: auto; }
.contact__icon { display: block; color: var(--color-300); margin-bottom: var(--space-6); }
.contact__icon svg { width: 30px; height: 30px; margin-inline: auto; }
.contact__title { margin-inline: auto; max-width: 18ch; }
.contact__title {
  font-family: var(--font-display);
  font-weight: 500; font-size: var(--fs-h2); line-height: 1.12;
  letter-spacing: -0.01em; color: var(--text-inverse);
}
.contact__lead { color: var(--color-100); margin-top: var(--space-5); font-size: var(--fs-lead); font-weight: 300; }
.contact__inner .btn { margin-top: var(--space-10); }
.contact__email { margin-top: var(--space-6); }
.contact__email a {
  color: var(--color-100); font-size: var(--text-sm); letter-spacing: 0.04em;
  border-bottom: 1px solid rgba(251,249,242,0.35); padding-bottom: 2px;
  transition: color var(--duration-fast) var(--ease-out), border-color var(--duration-fast) var(--ease-out);
}
.contact__email a:hover { color: var(--color-50); border-color: var(--color-50); }

/* ============ FOOTER ============ */
.footer { background: var(--color-950); border-top: 1px solid var(--border-light); padding-block: var(--space-10); }
.footer__inner {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: var(--space-6);
}
.footer__logo { height: 40px; width: auto; }
.footer__meta { display: flex; flex-direction: column; gap: var(--space-1); text-align: right; }
.footer__meta span { color: var(--color-200); font-size: var(--text-xs); letter-spacing: 0.02em; }
.footer__tm { color: var(--color-400) !important; }

/* ============ Scroll reveal ============ */
/* Hidden state only applies when JS is on (html.js), so no-JS users see everything. */
.js .reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity var(--duration-slower) var(--ease-out),
              transform var(--duration-slower) var(--ease-out);
  will-change: opacity, transform;
}
.js .reveal[data-reveal="left"]  { transform: translateX(-44px); }
.js .reveal[data-reveal="right"] { transform: translateX(44px); }
.js .reveal[data-reveal="scale"] { transform: scale(0.92); }
.js .reveal[data-reveal="fade"]  { transform: none; }
.js .reveal.is-in { opacity: 1; transform: none; will-change: auto; }

/* ============ Responsive ============ */
@media (max-width: 1023px) {
  .pillars { grid-template-columns: 1fr; gap: var(--space-10); }
  .pillar:not(:last-child)::after {
    top: auto; bottom: calc(var(--space-10) / -2); right: 0; left: 0;
    width: auto; height: 1px;
  }
  .clients__grid { grid-template-columns: repeat(2, 1fr); }
  .philosophy__inner { grid-template-columns: 1fr; gap: var(--space-10); }
  .philosophy__portrait { min-height: 0; order: -1; }
  .philosophy__img { max-width: 380px; }
}

@media (max-width: 640px) {
  .hero { padding-block: var(--space-24) var(--space-16); }
  .hero__scrim {
    background:
      linear-gradient(180deg, rgba(47,45,41,0.55), rgba(47,45,41,0.30) 35%, rgba(47,45,41,0.55) 70%, var(--color-950) 100%);
  }
  .hero__card { background: rgba(47,45,41,0.62); }
  .hero__actions .btn { flex: 1 1 auto; }
  .nav__logo { height: 46px; }
  .categories__row { gap: var(--space-5) var(--space-8); }
  .category { font-size: var(--text-xs); gap: var(--space-2); }
  .category svg { width: 22px; height: 22px; }
  .clients__grid { gap: var(--space-4); }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .footer__meta { text-align: left; }
}

/* ============ Reduced motion ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; will-change: auto; }
  .btn:hover, .btn--primary:hover { transform: none; }
  .categories__track { animation: none; }
  .hero__img { transform: none !important; }
}