/* ============================================================
   THE LUHN FINANCE — Premium dark theme (gold + teal accents)
   ============================================================ */

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);

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

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

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 1000px;
  --content-wide: 1240px;

  /* Fonts */
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
}

/* ---------- DARK (default) ---------- */
:root,
[data-theme='dark'] {
  --color-bg: #0d0f12;
  --color-surface: #14171c;
  --color-surface-2: #1a1e24;
  --color-surface-offset: #1f242b;
  --color-border: #2a3039;
  --color-divider: #21262d;

  --color-text: #e8e6e1;
  --color-text-muted: #9aa1aa;
  --color-text-faint: #6b727b;
  --color-text-inverse: #0d0f12;

  /* Gold primary */
  --color-primary: #d4af37;
  --color-primary-hover: #e6c456;
  --color-primary-soft: #b89225;
  --color-primary-highlight: #3a3220;

  /* Teal secondary */
  --color-teal: #2fb3ac;
  --color-teal-soft: #1c6f6a;
  --color-teal-highlight: #16322f;

  --color-success: #5fb878;
  --color-warning: #e0a458;
  --color-danger: #d96a6a;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow-md: 0 6px 18px oklch(0 0 0 / 0.45);
  --shadow-lg: 0 18px 48px oklch(0 0 0 / 0.55);

  --hero-overlay: linear-gradient(180deg, oklch(0.16 0.01 250 / 0.55) 0%, oklch(0.13 0.01 250 / 0.85) 60%, var(--color-bg) 100%);
}

/* ---------- LIGHT ---------- */
[data-theme='light'] {
  --color-bg: #f7f6f2;
  --color-surface: #ffffff;
  --color-surface-2: #f1efe8;
  --color-surface-offset: #ebe8df;
  --color-border: #d9d5ca;
  --color-divider: #e4e0d6;

  --color-text: #1c2024;
  --color-text-muted: #5b6068;
  --color-text-faint: #9298a0;
  --color-text-inverse: #ffffff;

  --color-primary: #9a7b1a;
  --color-primary-hover: #b08f22;
  --color-primary-soft: #b89225;
  --color-primary-highlight: #f0e8cf;

  --color-teal: #11716b;
  --color-teal-soft: #1c8f87;
  --color-teal-highlight: #d6ece9;

  --color-success: #2f7d4a;
  --color-warning: #9a6a1f;
  --color-danger: #b3433f;

  --shadow-sm: 0 1px 2px oklch(0.3 0.01 80 / 0.07);
  --shadow-md: 0 6px 18px oklch(0.3 0.01 80 / 0.09);
  --shadow-lg: 0 18px 48px oklch(0.3 0.01 80 / 0.13);

  --hero-overlay: linear-gradient(180deg, oklch(0.18 0.01 250 / 0.62) 0%, oklch(0.16 0.01 250 / 0.78) 55%, var(--color-bg) 100%);
}

/* ============================================================
   Layout primitives
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
}
.container--default { max-width: var(--content-default); }
.container--narrow { max-width: var(--content-narrow); }

.section {
  padding-block: clamp(var(--space-16), 9vw, var(--space-32));
}
.section--tight {
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.eyebrow::before {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--color-primary);
  opacity: 0.6;
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; }
.h-hero { font-size: var(--text-3xl); line-height: 1.05; letter-spacing: -0.01em; }
.h-section { font-size: var(--text-2xl); line-height: 1.1; letter-spacing: -0.01em; }
.h-sub { font-family: var(--font-body); font-size: var(--text-lg); font-weight: 600; line-height: 1.3; }

.lead {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
}
.muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  min-height: 46px;
  border: 1px solid transparent;
}
.btn--primary {
  background: var(--color-primary);
  color: #14110a;
}
.btn--primary:hover { background: var(--color-primary-hover); transform: translateY(-1px); }
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ============================================================
   Header / Nav
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}
.brand__mark { color: var(--color-primary); flex-shrink: 0; }
.brand__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.1;
}
.brand__name small {
  display: block;
  font-family: var(--font-body);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  font-weight: 500;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.nav__links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
}
.nav__links a:hover { color: var(--color-text); }
.nav__actions { display: flex; align-items: center; gap: var(--space-3); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.icon-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }

.nav__toggle { display: none; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  overflow: hidden;
  background:
    var(--hero-overlay),
    url('../assets/hero.png') center/cover no-repeat;
}
.hero .container {
  position: relative;
  z-index: 2;
  min-height: clamp(540px, 78vh, 760px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: var(--space-20);
}
.hero__inner { max-width: 720px; }
.hero h1 { color: #fff; margin-block: var(--space-5) var(--space-5); }
.hero .lead { color: rgba(255,255,255,0.82); }
[data-theme='light'] .hero h1 { color: #fff; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-top: var(--space-8); }
.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-10);
}
.trust-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: oklch(from var(--color-bg) l c h / 0.5);
  border: 1px solid var(--color-border);
  font-size: var(--text-xs);
  font-weight: 600;
  color: #e8e6e1;
  letter-spacing: 0.03em;
}
.trust-chip svg { color: var(--color-primary); }

/* ============================================================
   Compliance bar (always-visible disclosures)
   ============================================================ */
.compliance-bar {
  background: var(--color-surface);
  border-block: 1px solid var(--color-divider);
}
.compliance-bar .container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  padding-block: var(--space-8);
}
.cb-item { display: flex; flex-direction: column; gap: var(--space-1); }
.cb-item__label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  font-weight: 600;
}
.cb-item__value { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.cb-item__value span { color: var(--color-primary); }

/* ============================================================
   Cards / grids
   ============================================================ */
.grid { display: grid; gap: var(--space-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}
.card--hover { transition: border-color var(--transition-interactive), transform var(--transition-interactive); }
.card--hover:hover { border-color: var(--color-primary); transform: translateY(-3px); }
.card__icon {
  width: 52px;
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-highlight);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.card h3 { font-family: var(--font-body); font-weight: 600; font-size: var(--text-lg); margin-bottom: var(--space-3); }
.card p { color: var(--color-text-muted); font-size: var(--text-base); }

.section-head { max-width: 60ch; margin-bottom: var(--space-12); }
.section-head .h-section { margin-block: var(--space-4) var(--space-4); }

/* Split / editorial */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(var(--space-8), 5vw, var(--space-20));
  align-items: center;
}
.split__media img {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  width: 100%;
  object-fit: cover;
}
.split ul { list-style: none; display: grid; gap: var(--space-4); margin-top: var(--space-6); }
.split li { display: flex; gap: var(--space-3); align-items: flex-start; }
.split li svg { color: var(--color-primary); flex-shrink: 0; margin-top: 3px; }

/* Stats */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-8); }
.stat__num { font-family: var(--font-display); font-size: var(--text-2xl); color: var(--color-primary); line-height: 1; }
.stat__label { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-2); }

/* Team */
.team-card { text-align: left; }
.team-card__avatar {
  width: 64px; height: 64px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary-soft), var(--color-teal-soft));
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.4rem; color: #14110a; font-weight: 600;
  margin-bottom: var(--space-5);
}
.team-card h3 { font-family: var(--font-body); font-size: var(--text-lg); margin-bottom: var(--space-1); }
.team-card .role { color: var(--color-primary); font-size: var(--text-sm); font-weight: 600; margin-bottom: var(--space-3); }
.team-card .cred { font-size: var(--text-xs); color: var(--color-text-faint); margin-top: var(--space-3); }

/* ============================================================
   Risk disclosure block
   ============================================================ */
.risk-block {
  background: var(--color-surface-2);
  border: 1px solid var(--color-warning);
  border-left-width: 4px;
  border-radius: var(--radius-md);
  padding: var(--space-8);
}
.risk-block h3 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-warning);
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.risk-block p { color: var(--color-text-muted); font-size: var(--text-sm); margin-bottom: var(--space-3); }
.risk-block p:last-child { margin-bottom: 0; }

/* Fees table */
.fees-table { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; }
.fees-table th, .fees-table td { text-align: left; padding: var(--space-4) var(--space-6); border-bottom: 1px solid var(--color-divider); font-size: var(--text-sm); }
.fees-table th { background: var(--color-surface-2); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.08em; font-size: var(--text-xs); font-weight: 600; }
.fees-table tr:last-child td { border-bottom: none; }
.fees-table td:last-child { color: var(--color-primary); font-weight: 600; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-item {
  border-bottom: 1px solid var(--color-divider);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: var(--space-5) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-base);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .plus { color: var(--color-primary); transition: transform var(--transition-interactive); flex-shrink: 0; }
.faq-item[open] summary .plus { transform: rotate(45deg); }
.faq-item p { color: var(--color-text-muted); font-size: var(--text-sm); padding-bottom: var(--space-5); }

/* ============================================================
   Contact
   ============================================================ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(var(--space-8), 5vw, var(--space-16)); align-items: start; }
.field { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-5); }
.field label { font-size: var(--text-sm); font-weight: 600; }
.field input, .field textarea, .field select {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  font-size: var(--text-sm);
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--color-primary); outline: none; }
.contact-info { display: grid; gap: var(--space-6); }
.contact-info .ci { display: flex; gap: var(--space-4); align-items: flex-start; }
.contact-info .ci svg { color: var(--color-primary); flex-shrink: 0; margin-top: 2px; }
.contact-info .ci strong { display: block; font-size: var(--text-sm); }
.contact-info .ci span { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
}
.footer__top {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-8);
  padding-block: var(--space-16) var(--space-12);
}
.footer__brand p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-4); max-width: 38ch; }
.footer h4 { font-family: var(--font-body); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-faint); margin-bottom: var(--space-4); }
.footer ul { list-style: none; display: grid; gap: var(--space-3); }
.footer a { color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); }
.footer a:hover { color: var(--color-primary); }
.footer__legal {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-8);
}
.footer__legal p { font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-3); max-width: none; }
.footer__legal .copyright { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-4); align-items: center; }

/* Page hero (interior pages) */
.page-hero {
  border-bottom: 1px solid var(--color-divider);
  background:
    radial-gradient(120% 120% at 80% 0%, var(--color-primary-highlight) 0%, transparent 50%),
    var(--color-surface);
}
.page-hero .container { padding-block: clamp(var(--space-16), 8vw, var(--space-24)); }
.page-hero h1 { font-size: var(--text-2xl); margin-block: var(--space-4) var(--space-4); }
.page-hero p { color: var(--color-text-muted); max-width: 60ch; }

/* Legal/prose pages */
.prose { max-width: 72ch; }
.prose h2 { font-family: var(--font-body); font-weight: 700; font-size: var(--text-lg); margin-block: var(--space-10) var(--space-4); color: var(--color-text); }
.prose h3 { font-family: var(--font-body); font-weight: 600; font-size: var(--text-base); margin-block: var(--space-6) var(--space-3); }
.prose p, .prose li { color: var(--color-text-muted); font-size: var(--text-sm); margin-bottom: var(--space-4); line-height: 1.7; }
.prose ul { padding-left: var(--space-5); margin-bottom: var(--space-4); }
.prose li { margin-bottom: var(--space-2); }
.prose strong { color: var(--color-text); }
.prose .updated { font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-8); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.7s cubic-bezier(0.16,1,0.3,1), transform 0.7s cubic-bezier(0.16,1,0.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 980px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .compliance-bar .container { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  .nav__links { display: none; }
  .nav__links.open {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6) clamp(var(--space-5), 5vw, var(--space-12));
  }
  .nav__toggle { display: inline-flex; }
  .split { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: -1; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: var(--space-10); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer__legal .copyright { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 460px) {
  .compliance-bar .container { grid-template-columns: 1fr; }
}