/* ============================================================================
   Octagon Solutions — styles.css
   Ported from the approved standalone design. Organised as:
     1. Tokens · 2. Reset/base · 3. Primitives · 4. Header · 5. Hero
     6. Challenge · 7. Cards · 8. Cases · 9. Founder + M/V · 10. Contact
     11. Footer · 12. Responsive
   Brand rule: gold sings on black; on light it appears only as thin accents,
   and gold *text* on light uses --bronze for legibility.
   ========================================================================== */

/* ============================================================================
   1. TOKENS
   ========================================================================== */
:root {
  /* ---- Colour ------------------------------------------------------------ */
  --black:        #000000;   /* hero / contact / footer canvas */
  --black-soft:   #0B0B0A;   /* footer plate */
  --ink:          #1A1A1A;   /* headings & body on light */
  --ink-2:        #4B4945;   /* secondary body on light (warm grey) */
  --gold:         #D3AF37;   /* the wedge · accents · eyebrows · stats */
  --gold-champ:   #CDBD88;   /* champagne · primary-button hover · soft fills */
  --bronze:       #8A7223;   /* gold text on light (legible) */
  --wedge:        #D9D9D9;   /* the market half of the mark */
  --paper:        #ECEAE3;   /* warm document wash (alternating section) */
  --paper-2:      #F6F5F0;   /* lighter warm card field */
  --white:        #FFFFFF;
  --champ-text:   #D8C99A;   /* champagne text on black */

  /* Hairlines: gold on dark, warm ink on light */
  --line-dark:    rgba(211, 175, 55, 0.22);
  --line-light:   rgba(26, 26, 24, 0.12);
  --line-paper:   #DAD6CB;

  /* Text on dark */
  --t-on-dark:        #FFFFFF;
  --t-on-dark-soft:   rgba(255, 255, 255, 0.74);
  --t-on-dark-faint:  rgba(255, 255, 255, 0.46);

  /* ---- Type -------------------------------------------------------------- */
  --sans:  'Archivo', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --serif: 'Cormorant', Georgia, 'Times New Roman', serif;

  /* Fluid scale */
  --fs-hero:    clamp(2.6rem, 6vw, 5rem);
  --fs-h2:      clamp(1.75rem, 3.4vw, 2.75rem);
  --fs-h3:      clamp(1.15rem, 1.5vw, 1.3rem);
  --fs-lead:    clamp(1.06rem, 1.5vw, 1.22rem);
  --fs-body:    1rem;
  --fs-small:   0.875rem;
  --fs-eyebrow: 0.75rem;

  /* ---- Space ------------------------------------------------------------- */
  --container:  1180px;
  --pad-x:      clamp(1.5rem, 5vw, 4rem);
  --section-y:  clamp(4.75rem, 9vw, 8.5rem);
  --gap:        clamp(1.1rem, 1.6vw, 1.5rem);

  /* ---- Form -------------------------------------------------------------- */
  --radius:     3px;          /* sharp by default */
  --radius-pill: 999px;
  --header-h:   76px;
  --header-h-sm: 60px;
  --ease:       cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-card: 0 18px 44px rgba(20, 18, 10, 0.12);
}

/* ============================================================================
   2. RESET / BASE
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 8px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--ink);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
svg { display: block; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 800; line-height: 1.08; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--gold); color: var(--black); }
:focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; border-radius: 2px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* Skip link — hidden until focused (keyboard / screen-reader users) */
.skip-link {
  position: absolute; left: 12px; top: -120px; z-index: 1000;
  background: var(--black); color: var(--white);
  padding: 0.6rem 1rem; border: 1px solid var(--gold); border-radius: var(--radius);
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ============================================================================
   3. PRIMITIVES
   ========================================================================== */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--pad-x); }

.section { padding-block: var(--section-y); }
.section--paper { background: var(--paper); }
.section--dark  { background: var(--black); color: var(--t-on-dark); }

/* Eyebrow — gold dash + uppercase kicker */
.eyebrow {
  display: flex; align-items: center; gap: 0.7rem;
  font-size: var(--fs-eyebrow); font-weight: 600;
  letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--bronze); margin: 0 0 1.15rem;
}
.eyebrow::before { content: ""; width: 30px; height: 2px; background: var(--gold); flex: none; }
.eyebrow--gold { color: var(--gold); }

/* Section title — bold uppercase Archivo */
.h2 {
  font-size: var(--fs-h2); font-weight: 800; text-transform: uppercase;
  letter-spacing: 0.005em; line-height: 1.1; max-width: 20ch; text-wrap: balance;
}
.section--dark .h2 { color: var(--t-on-dark); }

.lead {
  margin-top: 1.4rem; max-width: 60ch;
  font-size: var(--fs-lead); line-height: 1.62; color: var(--ink-2);
}
.section--dark .lead { color: var(--t-on-dark-soft); }

/* Serif institutional helper */
.serif { font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.04em; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--sans); font-weight: 600; font-size: var(--fs-small);
  letter-spacing: 0.07em; text-transform: uppercase;
  padding: 0.9rem 1.7rem; border-radius: var(--radius);
  border: 1px solid transparent; cursor: pointer;
  transition: transform 0.18s var(--ease), background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--gold { background: var(--gold); color: var(--black); border-color: var(--gold); }
.btn--gold:hover { background: var(--gold-champ); border-color: var(--gold-champ); }
.btn--ghost { background: transparent; color: currentColor; border-color: currentColor; }
.btn--ghost:hover { border-color: var(--gold); color: var(--gold); }
.section--dark .btn--ghost:hover { color: var(--gold); border-color: var(--gold); }

/* Reveal — progressive enhancement: visible by default; hidden start-state
   only applies once JS adds .anim, so content never disappears without JS. */
.reveal { transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
body.anim .reveal:not(.in) { opacity: 0; transform: translateY(18px); }
.reveal.d1 { transition-delay: 0.06s; }
.reveal.d2 { transition-delay: 0.12s; }
.reveal.d3 { transition-delay: 0.18s; }
.reveal.d4 { transition-delay: 0.24s; }

/* ============================================================================
   4. HEADER
   ========================================================================== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(0, 0, 0, 0.86); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-dark); color: var(--t-on-dark);
  transition: background 0.25s var(--ease);
}
.header.scrolled { background: rgba(0, 0, 0, 0.97); }
.header-inner { display: flex; align-items: center; gap: 1.5rem; min-height: var(--header-h); transition: min-height 0.25s var(--ease); }
.header.scrolled .header-inner { min-height: var(--header-h-sm); }

.brand { display: inline-flex; align-items: center; gap: 0.7rem; }
.brand svg { width: 36px; height: 36px; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name { font-weight: 800; font-size: 1.12rem; letter-spacing: 0.08em; color: var(--white); line-height: 1; }
.brand-sub  { display: block; font-weight: 600; font-size: 0.6rem; letter-spacing: 0.42em; color: var(--gold); margin-top: 4px; line-height: 1; }

.nav { display: flex; gap: 1.7rem; margin-left: auto; }
.nav a {
  position: relative; white-space: nowrap; font-size: 0.8rem; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--t-on-dark-soft); padding: 0.35rem 0; transition: color 0.18s var(--ease);
}
.nav a::after { content: ""; position: absolute; left: 0; bottom: -1px; width: 0; height: 2px; background: var(--gold); transition: width 0.22s var(--ease); }
.nav a:hover { color: var(--white); }
.nav a:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 1rem; }
.lang {
  display: inline-flex; align-items: center; gap: 0.4rem; background: transparent;
  border: 1px solid var(--line-dark); border-radius: var(--radius); padding: 0.42rem 0.7rem;
  color: var(--t-on-dark-faint); font-family: var(--sans); font-weight: 600; font-size: 0.78rem; letter-spacing: 0.06em; cursor: pointer;
  transition: border-color 0.18s var(--ease);
}
.lang:hover { border-color: var(--gold); }
.lang .on { color: var(--gold); }
.lang .sep { opacity: 0.4; }
.header .btn { padding: 0.58rem 1.1rem; font-size: 0.72rem; }

.burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; margin-left: auto; }
.burger span { width: 24px; height: 2px; background: var(--white); transition: transform 0.2s var(--ease), opacity 0.2s var(--ease); }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================================
   5. HERO
   ========================================================================== */
.hero {
  position: relative; overflow: hidden; color: var(--t-on-dark);
  padding-block: clamp(5.5rem, 13vw, 10rem);
  background: radial-gradient(125% 130% at 82% 8%, #1A160F 0%, #000000 56%);
}
.hero-inner { position: relative; z-index: 2; max-width: 54rem; }
.hero h1 {
  margin-top: 1.6rem; max-width: 15ch;
  font-size: var(--fs-hero); font-weight: 800; text-transform: uppercase;
  letter-spacing: 0.005em; line-height: 1.0; text-wrap: balance;
}
.hero-sub { margin-top: 1.7rem; max-width: 48ch; font-size: var(--fs-lead); line-height: 1.6; color: var(--t-on-dark-soft); }
.hero-actions { margin-top: 2.4rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }
.hero-meta {
  margin-top: 3.2rem; padding-top: 1.4rem; border-top: 1px solid var(--line-dark);
  font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.08em;
  font-size: 1.05rem; color: var(--champ-text);
}
.hero-watermark {
  position: absolute; right: -9%; top: 50%; transform: translateY(-50%);
  width: clamp(360px, 50vw, 760px); opacity: 0.5; z-index: 1; pointer-events: none;
}

/* ============================================================================
   6. CHALLENGE — legal instruments
   ========================================================================== */
.instruments {
  margin-top: 3rem; display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 1px; background: var(--line-light); border: 1px solid var(--line-light); border-radius: var(--radius); overflow: hidden;
}
.instrument { background: var(--white); padding: 1.8rem 1.7rem; }
.instrument dt { font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.04em; font-size: 1.4rem; font-weight: 600; color: var(--bronze); }
.instrument dd { margin: 0.4rem 0 0; color: var(--ink-2); font-size: 0.97rem; line-height: 1.55; }

/* ============================================================================
   7. CARDS — services / process
   ========================================================================== */
.grid-3 { margin-top: 3rem; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.card {
  position: relative; background: var(--white);
  border: 1px solid var(--line-light); border-top: 3px solid var(--gold);
  border-radius: var(--radius); padding: 1.9rem 1.6rem 1.7rem;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}
.section--paper .card { background: var(--white); }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-card); }
.card--outline { background: transparent; border-color: var(--line-light); border-top-color: var(--bronze); }
.card-num { display: block; font-family: var(--serif); font-variant: small-caps; font-size: 1.55rem; font-weight: 600; letter-spacing: 0.04em; color: var(--bronze); line-height: 1; margin-bottom: 0.85rem; }
.card h3 { font-size: var(--fs-h3); font-weight: 800; text-transform: uppercase; letter-spacing: 0.025em; line-height: 1.25; color: var(--ink); }
.card p { margin-top: 0.65rem; font-size: 0.95rem; line-height: 1.6; color: var(--ink-2); }

/* ============================================================================
   8. CASES
   ========================================================================== */
.case {
  margin-top: 3rem; background: var(--black); color: var(--t-on-dark);
  border-left: 4px solid var(--gold); border-radius: var(--radius);
  padding: clamp(1.9rem, 4vw, 3rem);
}
.case-head { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.tag { white-space: nowrap; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--black); background: var(--gold); padding: 0.32rem 0.8rem; border-radius: var(--radius-pill); }
.case-title { font-size: clamp(1.6rem, 3.2vw, 2.3rem); font-weight: 800; text-transform: uppercase; letter-spacing: 0.01em; }
.case-desc { margin-top: 0.85rem; color: var(--t-on-dark-soft); max-width: 60ch; }
.case-points { margin-top: 1.5rem; display: grid; gap: 0.9rem; }
.case-points li { position: relative; padding-left: 1.7rem; color: rgba(255,255,255,0.9); line-height: 1.55; }
.case-points li::before { content: ""; position: absolute; left: 0; top: 0.5em; width: 9px; height: 9px; background: var(--gold); transform: rotate(45deg); }

.track-label { margin-top: 3rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--line-light); font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.05em; font-size: 1.4rem; font-weight: 600; color: var(--bronze); }
.track { margin-top: 1.6rem; display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
.track-item { padding: 1.3rem 1.4rem 1.3rem 1.5rem; background: var(--white); border: 1px solid var(--line-light); border-left: 2px solid var(--gold); border-radius: var(--radius); }
.track-item h4 { font-size: 1rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.025em; color: var(--ink); }
.track-item p { margin-top: 0.4rem; color: var(--ink-2); font-size: 0.93rem; line-height: 1.55; }

/* ============================================================================
   9. FOUNDER + MISSION/VISION
   ========================================================================== */
.founder { display: grid; grid-template-columns: 220px 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.founder-mark { width: clamp(150px, 26vw, 220px); }
.founder-role { margin-top: 0.6rem; font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.04em; font-size: 1.25rem; font-weight: 600; color: var(--bronze); }

.mv { margin-top: 0; display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
.mv-card { background: var(--white); border: 1px solid var(--line-light); border-top: 3px solid var(--gold); border-radius: var(--radius); padding: 2.1rem 2rem; }
.mv-card .eyebrow { margin-bottom: 0.9rem; }
.mv-text { font-family: var(--serif); font-variant: small-caps; font-size: clamp(1.3rem, 2.1vw, 1.6rem); line-height: 1.42; font-weight: 500; color: var(--ink); letter-spacing: 0.02em; }

/* ============================================================================
   10. CONTACT
   ========================================================================== */
.contact-actions { margin-top: 2.2rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }
.contact-grid {
  margin-top: 3.2rem; padding-top: 2.2rem; border-top: 1px solid var(--line-dark);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.6rem;
  font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.03em;
}
.contact-grid dt { font-size: 0.9rem; font-weight: 600; color: var(--gold); margin-bottom: 0.25rem; }
.contact-grid dd { margin: 0; font-size: 1.08rem; color: var(--white); }
.contact-grid a:hover { color: var(--gold); }

/* ============================================================================
   11. FOOTER
   ========================================================================== */
.footer { background: var(--black-soft); color: var(--t-on-dark-soft); border-top: 1px solid var(--line-dark); padding-block: 3.4rem; }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 1.8rem 2rem; align-items: start; }
.footer .brand svg { width: 40px; height: 40px; }
.footer address { grid-column: 2; grid-row: 1; justify-self: end; text-align: right; font-style: normal; display: grid; gap: 0.35rem; font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.03em; font-size: 1rem; }
.footer address a:hover { color: var(--gold); }
.footer-tagline { grid-column: 1 / -1; font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.04em; font-size: 1.35rem; color: var(--champ-text); max-width: 30ch; }
.footer-copy { grid-column: 1 / -1; padding-top: 1.6rem; border-top: 1px solid var(--line-dark); font-family: var(--serif); font-variant: small-caps; letter-spacing: 0.03em; font-size: 0.92rem; color: var(--t-on-dark-faint); }

/* ============================================================================
   12. RESPONSIVE
   ========================================================================== */
@media (max-width: 980px) {
  .nav, .header-actions { display: none; }
  .burger { display: flex; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .instruments, .grid-3, .track, .mv, .contact-grid { grid-template-columns: 1fr; }
  .founder { grid-template-columns: 1fr; text-align: left; }
  .founder-mark { width: 130px; }
  .contact-grid { gap: 1.3rem; }
  .footer-inner { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .footer address { justify-self: center; text-align: center; }
  .hero-meta { font-size: 0.95rem; }
}

/* Mobile dropdown panel */
.mobile { display: none; background: rgba(0,0,0,0.98); border-top: 1px solid var(--line-dark); }
.mobile.open { display: block; }
.mobile nav { display: flex; flex-direction: column; padding: 0.5rem var(--pad-x) 1.4rem; }
.mobile a { padding: 0.9rem 0; border-bottom: 1px solid var(--line-dark); text-transform: uppercase; font-size: 0.82rem; font-weight: 600; letter-spacing: 0.08em; color: var(--white); }
.mobile .btn { margin-top: 1rem; }