/* ==========================================================================
   Bretton Trade Advisors — main stylesheet
   ========================================================================== */

@import url("variables.css");

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--color-navy-500); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-700); }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-navy);
  line-height: var(--lh-tight);
  font-weight: 600;
  margin: 0 0 var(--space-2);
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-md); }

p { margin: 0 0 var(--space-2); }

.eyebrow {
  font-family: var(--font-sans);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--color-accent-700);
  margin-bottom: var(--space-1);
}

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.narrow { max-width: var(--maxw-narrow); }

.section { padding-block: var(--space-6); }
.section--alt { background: var(--color-bg-alt); }
.section--navy { background: var(--color-navy); color: #e8eef5; }
.section--navy h1, .section--navy h2, .section--navy h3 { color: #fff; }

.section-head { max-width: var(--maxw-narrow); margin-bottom: var(--space-4); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-700); color: #fff; }
.btn--ghost { background: transparent; border-color: currentColor; color: var(--color-navy); }
.btn--ghost:hover { background: var(--color-navy); color: #fff; border-color: var(--color-navy); }
.section--navy .btn--ghost { color: #fff; }
.section--navy .btn--ghost:hover { background: #fff; color: var(--color-navy); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand__mark { width: 34px; height: 34px; flex: none; }
.brand__name {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--color-navy);
  line-height: 1.1;
}
.brand__name span { display: block; font-family: var(--font-sans); font-size: var(--fs-xs); letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-slate-400); font-weight: 600; }

.nav__links { display: flex; align-items: center; gap: var(--space-3); list-style: none; margin: 0; padding: 0; }
.nav__links a {
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-slate);
  padding: 0.4rem 0;
  position: relative;
}
.nav__links a:hover,
.nav__links a[aria-current="page"] { color: var(--color-navy); }
.nav__links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 100%; height: 2px; background: var(--color-accent);
}
.nav__cta { margin-left: var(--space-1); }

.nav__toggle {
  display: none; background: none; border: 0; cursor: pointer; padding: 0.4rem;
}
.nav__toggle span { display: block; width: 24px; height: 2px; background: var(--color-navy); margin: 5px 0; transition: var(--transition); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, var(--color-navy) 0%, var(--color-navy-700) 70%, var(--color-navy-500) 100%);
  color: #e8eef5;
  padding-block: clamp(4rem, 12vw, 8rem);
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.06) 1px, transparent 0);
  background-size: 28px 28px; pointer-events: none;
}
.hero__inner { position: relative; max-width: 780px; }
.hero h1 { color: #fff; font-size: var(--fs-3xl); margin-bottom: var(--space-3); }
.hero p { font-size: var(--fs-md); color: #c9d6e5; margin-bottom: var(--space-4); }
.hero .btn-row { display: flex; gap: var(--space-2); flex-wrap: wrap; }

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

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.card__icon {
  width: 44px; height: 44px; margin-bottom: var(--space-2);
  color: var(--color-accent-700);
}
.card h3 { margin-bottom: var(--space-1); }
.card p { color: var(--color-slate); font-size: var(--fs-sm); margin: 0; }

/* ---------- Stats ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); }
.stat__num { font-family: var(--font-serif); font-size: var(--fs-xl); color: var(--color-accent); line-height: 1; }
.stat__label { font-size: var(--fs-sm); color: var(--color-slate); margin-top: var(--space-1); }
.section--navy .stat__label { color: #c9d6e5; }

/* ---------- Tag list (sectors / regions) ---------- */
.taglist { display: flex; flex-wrap: wrap; gap: 0.6rem; list-style: none; padding: 0; margin: 0; }
.taglist li {
  font-family: var(--font-sans); font-size: var(--fs-sm); font-weight: 500;
  color: var(--color-navy); background: #fff; border: 1px solid var(--color-line);
  border-radius: 999px; padding: 0.45rem 1rem;
}
.section--navy .taglist li { color: #fff; background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.18); }

/* ---------- Steps (engagement) ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-3); counter-reset: step; }
.step { }
.step__num {
  font-family: var(--font-serif); font-size: var(--fs-lg); color: var(--color-accent);
  width: 48px; height: 48px; border-radius: 50%; border: 1.5px solid var(--color-accent);
  display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-2);
}
.step h3 { font-size: var(--fs-md); margin-bottom: 0.4rem; }
.step p { color: var(--color-slate); font-size: var(--fs-sm); margin: 0; }
@media (max-width: 860px) { .steps { grid-template-columns: 1fr; } }

/* ---------- Founder layout ---------- */
.founder {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-4);
  align-items: start;
}
.founder__photo { margin: 0; }
.founder__photo img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  object-fit: cover;
}
@media (max-width: 860px) {
  .founder { grid-template-columns: 1fr; gap: var(--space-3); }
  .founder__photo { max-width: 280px; }
}

/* ---------- Prose (About) ---------- */
.prose { max-width: var(--maxw-narrow); }
.prose p { color: var(--color-slate); }
.prose ul { color: var(--color-slate); padding-left: 1.2rem; }
.prose li { margin-bottom: 0.5rem; }

.credentials { list-style: none; padding: 0; margin: 0; }
.credentials li { padding: var(--space-2) 0; border-bottom: 1px solid var(--color-line); }
.credentials strong { color: var(--color-navy); display: block; font-family: var(--font-serif); }
.credentials span { color: var(--color-slate); font-size: var(--fs-sm); }

/* ---------- Contact ---------- */
.contact-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.field { margin-bottom: var(--space-2); }
.field label { display: block; font-size: var(--fs-sm); font-weight: 600; color: var(--color-navy); margin-bottom: 0.35rem; }
.field input,
.field textarea {
  width: 100%; font-family: var(--font-sans); font-size: var(--fs-base);
  padding: 0.75rem 0.9rem; border: 1px solid var(--color-line); border-radius: var(--radius);
  background: #fff; color: var(--color-ink); transition: border-color var(--transition);
}
.field input:focus,
.field textarea:focus { outline: none; border-color: var(--color-navy-500); }

.contact-detail { display: flex; align-items: center; gap: 0.7rem; margin-bottom: var(--space-2); }
.contact-detail svg { width: 22px; height: 22px; color: var(--color-accent-700); flex: none; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-navy); color: #b7c5d6; padding-block: var(--space-4); font-size: var(--fs-sm); }
.site-footer a { color: #d7e2ef; }
.site-footer a:hover { color: #fff; }
.footer-grid { display: flex; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap; align-items: flex-start; }
.footer-brand { font-family: var(--font-serif); color: #fff; font-size: 1.1rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); margin-top: var(--space-3); padding-top: var(--space-2); font-size: var(--fs-xs); color: var(--color-slate-400); }

/* ---------- Page header (interior pages) ---------- */
.page-head { background: var(--color-bg-alt); border-bottom: 1px solid var(--color-line); padding-block: var(--space-5); }
.page-head h1 { margin-bottom: var(--space-1); }
.page-head p { color: var(--color-slate); max-width: 60ch; margin: 0; }

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-3 { margin-top: var(--space-3); }
[hidden] { display: none !important; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid--3 { grid-template-columns: 1fr; }
  .grid--2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }

  .nav__toggle { display: block; }
  .nav__links {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: #fff; border-bottom: 1px solid var(--color-line);
    padding: var(--space-2) var(--gutter); box-shadow: var(--shadow-md);
  }
  .nav__links[data-open="false"] { display: none; }
  .nav__links li { width: 100%; }
  .nav__links a { display: block; padding: 0.7rem 0; width: 100%; }
  .nav__cta { margin: var(--space-1) 0 0; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}