/* ============================================================
   SP Legal Advisors — Private Offerings Explainer
   Brand palette (BRAND_GUIDE v5): Navy #102031, Gold #B8945A,
   Copper #8B6B3D, Cream #FAF0F0
   ============================================================ */

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.25vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.04rem + 0.4vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.25rem + 1vw, 2.125rem);
  --text-2xl: clamp(2rem, 1.4rem + 2.4vw, 3.25rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem;
  --space-4: 1rem;     --space-5: 1.25rem;  --space-6: 1.5rem;
  --space-8: 2rem;     --space-10: 2.5rem;  --space-12: 3rem;
  --space-16: 4rem;    --space-20: 5rem;    --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.375rem; --radius-md: 0.5rem; --radius-lg: 0.875rem;
  --radius-xl: 1.25rem; --radius-full: 9999px;

  --content-narrow: 680px;
  --content-default: 1080px;
  --content-wide: 1240px;

  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-ui: 'Inter', -apple-system, sans-serif;

  /* Brand colors */
  --navy: #102031;
  --gold: #B8945A;
  --copper: #8B6B3D;
  --cream: #FAF0F0;
}

/* LIGHT MODE */
:root, [data-theme="light"] {
  --color-bg: #FAF6F2;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5EFE9;
  --color-surface-offset: #F1E9E1;
  --color-border: #E3D8CC;
  --color-divider: #EADFD3;

  --color-text: #102031;
  --color-text-muted: #5A6573;
  --color-text-faint: #9aa3ad;
  --color-text-inverse: #FAF0F0;

  --color-primary: #102031;
  --color-primary-hover: #1c3550;
  --color-accent: #9a7838;        /* darkened gold for AA contrast on light */
  --color-accent-soft: #B8945A;
  --color-accent-bg: #F3E9D9;

  --shadow-sm: 0 1px 2px rgba(16,32,49,0.06);
  --shadow-md: 0 6px 20px rgba(16,32,49,0.09);
  --shadow-lg: 0 18px 48px rgba(16,32,49,0.14);

  --hero-bg: linear-gradient(150deg, #0d1c2c 0%, #15293f 55%, #1c3550 100%);
}

/* DARK MODE */
[data-theme="dark"] {
  --color-bg: #0c1722;
  --color-surface: #122131;
  --color-surface-2: #16283b;
  --color-surface-offset: #16283b;
  --color-border: #25394f;
  --color-divider: #1d2f43;

  --color-text: #e6ddd2;
  --color-text-muted: #9fb0c2;
  --color-text-faint: #6b7d90;
  --color-text-inverse: #102031;

  --color-primary: #c9a567;
  --color-primary-hover: #d7b67d;
  --color-accent: #cda863;
  --color-accent-soft: #B8945A;
  --color-accent-bg: #1a2c3f;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.45);
  --shadow-lg: 0 18px 48px rgba(0,0,0,0.55);

  --hero-bg: linear-gradient(150deg, #0a1521 0%, #0f1f30 55%, #142840 100%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0c1722; --color-surface: #122131; --color-surface-2: #16283b;
    --color-surface-offset: #16283b; --color-border: #25394f; --color-divider: #1d2f43;
    --color-text: #e6ddd2; --color-text-muted: #9fb0c2; --color-text-faint: #6b7d90;
    --color-text-inverse: #102031; --color-primary: #c9a567; --color-primary-hover: #d7b67d;
    --color-accent: #cda863; --color-accent-soft: #B8945A; --color-accent-bg: #1a2c3f;
    --hero-bg: linear-gradient(150deg, #0a1521 0%, #0f1f30 55%, #142840 100%);
  }
}

/* ---------- Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility; scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}
body {
  min-height: 100dvh; line-height: 1.65;
  font-family: var(--font-body); font-size: var(--text-base);
  color: var(--color-text); background: var(--color-bg);
  transition: background var(--transition), color var(--transition);
}
img, svg { display: block; max-width: 100%; height: auto; }
ul[role="list"] { list-style: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a { color: inherit; }
h1,h2,h3,h4 { font-family: var(--font-display); line-height: 1.1; text-wrap: balance; font-weight: 600; }
p, li { text-wrap: pretty; }
::selection { background: rgba(184,148,90,0.28); color: var(--color-text); }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: var(--radius-sm); }

.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; }

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

.wrap { width: 100%; max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-6); }
.wrap-narrow { max-width: var(--content-narrow); }
.eyebrow {
  font-family: var(--font-ui); font-size: var(--text-xs); font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-accent);
}

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); padding-block: var(--space-3); max-width: var(--content-wide); margin-inline: auto; padding-inline: var(--space-6); }
.brand { display: flex; align-items: center; gap: var(--space-3); text-decoration: none; }
.brand__mark { height: 40px; width: 40px; flex: none; }
.brand__mark--light { display: block; } .brand__mark--dark { display: none; }
[data-theme="dark"] .brand__mark--light { display: none; } [data-theme="dark"] .brand__mark--dark { display: block; }
@media (prefers-color-scheme: dark) { :root:not([data-theme]) .brand__mark--light { display:none; } :root:not([data-theme]) .brand__mark--dark { display:block; } }
.brand__text { display: flex; flex-direction: column; line-height: 1.1; }
.brand__name { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; letter-spacing: 0.02em; color: var(--color-text); white-space: nowrap; }
.brand__suffix { font-size: 0.62em; font-weight: 600; vertical-align: 0.25em; letter-spacing: 0.04em; }
.brand__tag { font-family: var(--font-body); font-style: italic; font-size: 0.7rem; letter-spacing: 0.06em; color: var(--color-text-muted); text-transform: uppercase; }
@media (max-width: 560px) { .brand__tag { display: none; } .brand__name { font-size: 1.02rem; } }

.nav { display: flex; align-items: center; gap: var(--space-6); font-family: var(--font-ui); font-size: var(--text-sm); }
.nav a { text-decoration: none; color: var(--color-text-muted); font-weight: 500; transition: color var(--transition); }
.nav a:hover { color: var(--color-text); }
.header__actions { display: flex; align-items: center; gap: var(--space-3); }
.theme-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius-full); color: var(--color-text-muted); border: 1px solid var(--color-border); transition: all var(--transition); }
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-family: var(--font-ui); font-size: var(--text-sm); font-weight: 600;
  padding: 0.7rem 1.35rem; border-radius: var(--radius-full); text-decoration: none;
  transition: all var(--transition); white-space: nowrap;
}
.btn--primary { background: var(--color-primary); color: var(--color-text-inverse); border: 1px solid var(--color-primary); }
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
[data-theme="dark"] .btn--primary { color: #0c1722; }
.btn--ghost { border: 1px solid var(--color-border); color: var(--color-text); background: var(--color-surface); }
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-1px); }
.btn--gold { background: var(--color-accent-soft); color: #1a1206; border: 1px solid var(--color-accent-soft); }
.btn--gold:hover { filter: brightness(1.06); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.nav-cta { display: none; }
@media (min-width: 860px) { .nav-cta { display: inline-flex; } }

/* ---------- Hero ---------- */
.hero { position: relative; color: #f2ece3; background: var(--hero-bg); overflow: hidden; }
.hero::after {
  content: ""; position: absolute; inset: 0; opacity: 0.5; pointer-events: none;
  background:
    radial-gradient(620px 380px at 88% -8%, rgba(184,148,90,0.22), transparent 70%),
    radial-gradient(520px 320px at 4% 110%, rgba(139,107,61,0.18), transparent 70%);
}
.hero__inner { position: relative; z-index: 1; max-width: var(--content-default); margin-inline: auto; padding: clamp(var(--space-16), 9vw, var(--space-32)) var(--space-6) clamp(var(--space-12), 7vw, var(--space-24)); }
.hero .eyebrow { color: var(--gold); }
.hero h1 { font-size: var(--text-2xl); color: #fbf6ee; margin-top: var(--space-4); max-width: 18ch; font-weight: 600; }
.hero h1 em { font-style: italic; color: var(--gold); }
.hero__lede { font-size: var(--text-lg); color: #cdd6e0; max-width: 56ch; margin-top: var(--space-5); line-height: 1.6; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); margin-top: var(--space-8); }
.hero__note { font-family: var(--font-ui); font-size: var(--text-xs); color: #97a6b6; margin-top: var(--space-5); letter-spacing: 0.02em; }
.hero__rule { width: 64px; height: 2px; background: var(--gold); border: 0; margin-bottom: var(--space-2); }

/* ---------- Sections ---------- */
section { padding-block: clamp(var(--space-16), 8vw, var(--space-24)); }
.section-head { max-width: 60ch; margin-bottom: var(--space-10); }
.section-head h2 { font-size: var(--text-xl); margin-top: var(--space-3); }
.section-head p { color: var(--color-text-muted); margin-top: var(--space-4); font-size: var(--text-lg); }
.alt { background: var(--color-surface-2); border-block: 1px solid var(--color-divider); }

/* Basics cards */
.grid { display: grid; gap: var(--space-5); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: var(--space-6);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--color-accent); }
.card__icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: var(--radius-md); background: var(--color-accent-bg); color: var(--color-accent); margin-bottom: var(--space-4); }
.card__icon svg { width: 22px; height: 22px; }
.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.card p { color: var(--color-text-muted); font-size: var(--text-base); }
.card .tag { display:inline-block; font-family: var(--font-ui); font-size: var(--text-xs); font-weight:600; letter-spacing:0.05em; color: var(--color-accent); background: var(--color-accent-bg); padding: 0.2rem 0.6rem; border-radius: var(--radius-full); margin-bottom: var(--space-3); }

/* Comparison table */
.compare { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-lg); background: var(--color-surface); }
table.cmp { width: 100%; border-collapse: collapse; font-size: var(--text-sm); min-width: 640px; }
table.cmp th, table.cmp td { padding: var(--space-4) var(--space-5); text-align: left; vertical-align: top; border-bottom: 1px solid var(--color-divider); }
table.cmp thead th { font-family: var(--font-ui); font-size: var(--text-xs); letter-spacing: 0.08em; text-transform: uppercase; color: var(--color-text-inverse); background: var(--color-primary); }
[data-theme="dark"] table.cmp thead th { color: #0c1722; }
table.cmp thead th:first-child { background: var(--color-surface-offset); color: var(--color-text-muted); }
table.cmp thead th.col-accent { background: var(--color-accent-soft); color: #1a1206; }
table.cmp tbody th { font-family: var(--font-ui); font-weight: 600; font-size: var(--text-xs); letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-text-muted); white-space: nowrap; width: 22%; }
table.cmp td { color: var(--color-text); }
table.cmp tr:last-child th, table.cmp tr:last-child td { border-bottom: 0; }
table.cmp .col-accent { background: color-mix(in oklab, var(--color-accent-bg) 55%, transparent); }

/* Verification steps */
.steps { counter-reset: step; display: grid; gap: var(--space-4); }
.step { display: grid; grid-template-columns: auto 1fr; gap: var(--space-5); align-items: start; padding: var(--space-5) var(--space-6); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); }
.step__num { counter-increment: step; font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600; color: var(--color-accent); line-height: 1; min-width: 2ch; }
.step__num::before { content: counter(step, decimal-leading-zero); }
.step h3 { font-size: var(--text-lg); margin-bottom: var(--space-1); }
.step p { color: var(--color-text-muted); font-size: var(--text-base); }

/* Checklist */
.checklist { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.check { display: flex; gap: var(--space-3); align-items: flex-start; padding: var(--space-4) var(--space-5); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.check svg { flex-shrink: 0; width: 20px; height: 20px; color: var(--color-accent); margin-top: 2px; }
.check b { font-family: var(--font-ui); font-size: var(--text-sm); display: block; margin-bottom: 2px; }
.check span { color: var(--color-text-muted); font-size: var(--text-sm); }

/* FAQ */
.faq { display: grid; gap: var(--space-3); }
.faq details { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); overflow: hidden; transition: border-color var(--transition); }
.faq details[open] { border-color: var(--color-accent); }
.faq summary { list-style: none; cursor: pointer; padding: var(--space-5) var(--space-6); font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-ui); font-size: 1.5rem; color: var(--color-accent); transition: transform var(--transition); line-height: 1; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .faq__body { padding: 0 var(--space-6) var(--space-5); color: var(--color-text-muted); }
.faq .faq__body p + p { margin-top: var(--space-3); }

/* CTA band */
.cta-band { background: var(--hero-bg); color: #f2ece3; text-align: center; border-radius: var(--radius-xl); padding: clamp(var(--space-12), 6vw, var(--space-20)) var(--space-6); position: relative; overflow: hidden; }
.cta-band::after { content:""; position:absolute; inset:0; background: radial-gradient(500px 300px at 50% -10%, rgba(184,148,90,0.2), transparent 70%); pointer-events:none; }
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { font-size: var(--text-xl); color: #fbf6ee; }
.cta-band p { color: #cdd6e0; max-width: 52ch; margin: var(--space-4) auto 0; font-size: var(--text-lg); }
.cta-band .hero__actions { justify-content: center; margin-top: var(--space-8); }
.cta-contacts { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-6); margin-top: var(--space-8); font-family: var(--font-ui); font-size: var(--text-sm); }
.cta-contacts a { color: #e9d3a8; text-decoration: none; display: inline-flex; align-items: center; gap: var(--space-2); }
.cta-contacts a:hover { color: #fff; }
.cta-contacts svg { width: 18px; height: 18px; }

/* Callout */
.callout { border-left: 3px solid var(--color-accent); background: var(--color-accent-bg); padding: var(--space-5) var(--space-6); border-radius: var(--radius-md); margin-top: var(--space-8); }
.callout p { font-size: var(--text-base); }
.callout b { font-family: var(--font-ui); }

/* ---------- Footer ---------- */
.footer { background: var(--navy); color: #c2ccd6; padding-block: var(--space-16) var(--space-8); }
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: var(--space-8); max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-6); }
.footer img { height: 46px; margin-bottom: var(--space-4); }
.footer h4 { font-family: var(--font-ui); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--gold); margin-bottom: var(--space-4); font-weight: 700; }
.footer a { color: #c2ccd6; text-decoration: none; font-size: var(--text-sm); transition: color var(--transition); }
.footer a:hover { color: #fff; }
.footer ul { list-style: none; display: grid; gap: var(--space-2); }
.footer__addr { font-size: var(--text-sm); line-height: 1.7; color: #a6b2bd; }
.disclaimer { max-width: var(--content-default); margin: var(--space-12) auto 0; padding: var(--space-8) var(--space-6) 0; border-top: 1px solid rgba(255,255,255,0.12); }
.disclaimer p { font-family: var(--font-ui); font-size: var(--text-xs); line-height: 1.7; color: #8d99a5; max-width: 100%; }
.disclaimer a { color: #c9a567; text-decoration: underline; text-underline-offset: 2px; }
.disclaimer a:hover { color: #e0c084; }
/* Visible top-of-page attorney advertising label (NY RPC 7.1(f)) */
.ad-label { background: var(--color-surface-2); border-bottom: 1px solid var(--color-divider); }
.ad-label__inner { max-width: var(--content-wide); margin-inline: auto; padding: var(--space-2) var(--space-6); font-family: var(--font-ui); font-size: var(--text-xs); letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-muted); text-align: right; }
.disclaimer p + p { margin-top: var(--space-3); }
.disclaimer strong { color: #b8c2cc; }
.footer__legal { max-width: var(--content-default); margin: var(--space-8) auto 0; padding-inline: var(--space-6); display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-3); font-family: var(--font-ui); font-size: var(--text-xs); color: #7c8893; }

@media (max-width: 980px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav { display: none; }
  .footer__top { grid-template-columns: 1fr; gap: var(--space-8); }
  .ad-label__inner { text-align: left; }
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: none; }