/* ===================================================================
   TraderFolks — /join — Vantage IB onboarding guide
   Design tokens: official brand (assets/traderfolks_logo.svg)
   =================================================================== */

:root {
  --blue: #0087f6;
  --blue-dark: #096bbb;
  --blue-soft: #eaf4ff;
  --orange: #dd390d;
  --orange-dark: #b82e09;
  --ink: #12141a;
  --muted: #5b6472;
  --muted-2: #838d9c;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --border: #e6e8ec;
  --border-strong: #d7dae0;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 1px 2px rgba(18, 20, 26, 0.04), 0 8px 24px rgba(18, 20, 26, 0.06);
  --shadow-lg: 0 4px 8px rgba(18, 20, 26, 0.05), 0 16px 40px rgba(18, 20, 26, 0.10);
  --max: 1100px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}

img { max-width: 100%; display: block; }
a { color: var(--blue); }
a:hover { color: var(--blue-dark); }

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

[hidden] { display: none !important; }

/* ─── Header ───────────────────────────────────────────── */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.brand img { height: 28px; width: auto; }
.brand-word { font-weight: 800; font-size: 1.05rem; color: var(--ink); letter-spacing: -0.01em; }
.brand-word span { color: var(--orange); }

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px;
  background: var(--bg-soft);
}
.lang-btn {
  border: none;
  background: transparent;
  padding: 6px 14px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  font-family: inherit;
}
.lang-btn[aria-pressed="true"] {
  background: var(--ink);
  color: #fff;
}

/* ─── Hero ─────────────────────────────────────────────── */

.hero {
  padding: 64px 0 40px;
  text-align: center;
  background:
    radial-gradient(900px 320px at 50% -10%, rgba(0, 135, 246, 0.08), transparent),
    var(--bg);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.hero__subtitle {
  max-width: 640px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.05rem;
}

/* ─── Case selector cards ──────────────────────────────── */

.case-tabs { position: relative; }

/* The two radio inputs live as direct children of .case-tabs (siblings of .case-select
   and .case-panel--N) so the `~` combinator below can drive both the active card style
   and the panel visibility. Visually hidden but still focusable/keyboard-operable. */
.case-tabs > input[type="radio"] {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
  pointer-events: none;
}

.case-select {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  max-width: 820px;
  margin: 36px auto 0;
}
@media (max-width: 720px) {
  .case-select { grid-template-columns: 1fr; }
}

.case-card {
  display: block;
  text-align: left;
  cursor: pointer;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 22px 20px;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.case-card:hover { border-color: var(--border-strong); transform: translateY(-2px); box-shadow: var(--shadow); }

.case-card__tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 10px;
}
.case-card__title {
  font-size: 1.15rem;
  font-weight: 800;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.case-card__desc { color: var(--muted); font-size: 0.92rem; margin: 0 0 14px; }
.case-card__pick {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--blue-dark);
}
.case-card__pick::after { content: '\2192'; transition: transform 0.15s; }
.case-card:hover .case-card__pick::after { transform: translateX(3px); }

/* Active-state highlighting driven by the sibling radio inputs, which are DOM siblings
   of the .container wrapping .case-select (not of .case-select itself) — see index.html. */
#case-1:checked ~ .container label[for="case-1"],
#case-2:checked ~ .container label[for="case-2"] {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft), var(--shadow);
}
#case-1:checked ~ .container label[for="case-1"] .case-card__pick,
#case-2:checked ~ .container label[for="case-2"] .case-card__pick {
  color: var(--orange-dark);
}
#case-1:focus-visible ~ .container label[for="case-1"],
#case-2:focus-visible ~ .container label[for="case-2"] {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ─── Case panels ──────────────────────────────────────── */

.case-panel { display: none; padding: 56px 0 8px; }
#case-1:checked ~ .case-panel--1 { display: block; }
#case-2:checked ~ .case-panel--2 { display: block; }

.panel-head { max-width: 720px; margin: 0 auto 36px; text-align: center; }
.panel-head__kicker {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--blue-dark);
  margin-bottom: 8px;
}
.panel-head h2 { font-size: 1.7rem; font-weight: 800; letter-spacing: -0.01em; margin: 0 0 10px; }
.panel-head p { color: var(--muted); margin: 0; }

.panel-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 900px) {
  .panel-grid { grid-template-columns: 1fr; }
}

.panel-media {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.device-frame {
  border: 10px solid var(--ink);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  max-width: 260px;
}
.device-frame img { width: 100%; }
.media-caption { font-size: 0.8rem; color: var(--muted-2); text-align: center; }

/* ─── Steps ────────────────────────────────────────────── */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  display: flex;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}
.steps li:last-child { border-bottom: none; }
.steps li::before {
  content: counter(step);
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step-body h3 { margin: 2px 0 4px; font-size: 1rem; font-weight: 700; }
.step-body p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.step-body a { font-weight: 600; }

.step-cta { margin-top: 28px; text-align: center; }

/* ─── Buttons ──────────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 13px 26px;
  border-radius: 999px;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--orange); color: #fff; box-shadow: 0 10px 24px rgba(221, 57, 13, 0.28); }
.btn--primary:hover { background: var(--orange-dark); color: #fff; }
.btn--outline { background: #fff; color: var(--ink); border-color: var(--border-strong); }
.btn--outline:hover { border-color: var(--blue); color: var(--blue-dark); }
.btn--block { display: flex; justify-content: center; width: 100%; }

/* ─── Callout (IB transfer details) ────────────────────── */

.callout {
  background: var(--blue-soft);
  border: 1px solid #cfe6fb;
  border-left: 4px solid var(--blue);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 0 0 32px;
}
.callout__title { font-weight: 800; font-size: 0.95rem; margin: 0 0 14px; }
.callout__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid rgba(0, 135, 246, 0.15);
}
.callout__row:first-of-type { border-top: none; }
.callout__label { font-size: 0.86rem; color: var(--muted); font-weight: 600; }
.callout__value { display: flex; align-items: center; gap: 10px; }

.chip {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;
  font-weight: 700;
  font-size: 0.95rem;
  background: #fff;
  border: 1px solid #cfe6fb;
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  color: var(--ink);
  letter-spacing: 0.02em;
}

.copy-btn {
  font-family: inherit;
  font-size: 0.78rem;
  font-weight: 700;
  border: 1px solid var(--border-strong);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 6px 14px;
  cursor: pointer;
  min-width: 96px;
}
.copy-btn:hover { border-color: var(--blue); color: var(--blue-dark); }
.copy-btn--done { border-color: #17a76a; color: #17a76a; }

/* ─── Transfer screenshots (side by side) ──────────────── */

.shot-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 8px 0 36px;
}
@media (max-width: 640px) {
  .shot-pair { grid-template-columns: 1fr; }
}
.shot {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  box-shadow: var(--shadow);
}
.shot img { width: 100%; }
.shot figcaption {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: #fff;
}

.note {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}
.note a { font-weight: 600; }

/* ─── FAQ ──────────────────────────────────────────────── */

.faq {
  max-width: 760px;
  margin: 72px auto 0;
  padding: 0 0 8px;
}
.faq h2 { text-align: center; font-size: 1.5rem; font-weight: 800; margin: 0 0 24px; letter-spacing: -0.01em; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 20px;
  margin-bottom: 10px;
  background: var(--bg);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 16px 0;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--muted-2);
  flex: 0 0 auto;
}
.faq-item[open] summary::after { content: '\2212'; }
.faq-item p { margin: 0 0 18px; color: var(--muted); font-size: 0.92rem; }

/* ─── Footer ───────────────────────────────────────────── */

.site-footer {
  margin-top: 80px;
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 40px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 32px;
  margin-bottom: 24px;
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-disclosure { font-size: 0.8rem; color: var(--muted-2); line-height: 1.6; }
.footer-disclosure strong { color: var(--muted); }
.footer-disclosure + .footer-disclosure { margin-top: 10px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; align-items: flex-start; }
.footer-links a { font-size: 0.88rem; font-weight: 600; text-decoration: none; }
.footer-bottom {
  border-top: 1px solid var(--border-strong);
  padding-top: 18px;
  font-size: 0.78rem;
  color: var(--muted-2);
  text-align: center;
}

/* ─── Utility ──────────────────────────────────────────── */

.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;
}