/* ============================================================
   ISB public site — landing, blog, careers, compliance, privacy, terms
   Builds on style.css (Banknote design system tokens).
   ============================================================ */

/* ---------- Shell ---------- */
.site-wrap { max-width: 1200px; margin: 0 auto; padding-left: 1.5rem; padding-right: 1.5rem; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg); border-bottom: 1px solid var(--border);
}
.site-header .site-wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  min-height: 64px; flex-wrap: wrap; padding-top: 0.5rem; padding-bottom: 0.5rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--text-1); }
.brand:hover { color: var(--text-1); }
.brand-mark { width: 32px; height: 32px; color: var(--brand); flex-shrink: 0; }
.brand-name { font-family: var(--font-display); font-weight: 800; font-size: 1.375rem; letter-spacing: -0.02em; line-height: 1; }

.site-nav { display: flex; align-items: center; gap: 1.75rem; }
.site-nav a {
  font-size: 0.9375rem; font-weight: 500; color: var(--text-2); text-decoration: none;
  padding: 0.5rem 0; border-bottom: 2px solid transparent;
}
.site-nav a:hover { color: var(--text-1); border-bottom-color: var(--brass); }
.site-nav a[aria-current="page"] { color: var(--text-1); border-bottom-color: var(--brand); }
.site-actions { display: flex; align-items: center; gap: 0.5rem; }
.site-actions .btn { min-height: 40px; }

@media (max-width: 860px) {
  .site-nav { order: 3; width: 100%; gap: 1.25rem; overflow-x: auto; padding-bottom: 0.25rem; }
  .site-nav a { white-space: nowrap; min-height: 44px; display: inline-flex; align-items: center; }
}
@media (max-width: 520px) {
  .site-actions .btn-ghost { display: none; }
  .site-actions .btn, .theme-toggle { min-height: 44px; }
  .theme-toggle { width: 44px; height: 44px; }
}

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); background: var(--surface-2); margin-top: 4rem; }
.site-footer .site-wrap { padding-top: 2.5rem; padding-bottom: 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
.footer-about { font-size: 0.875rem; color: var(--text-2); margin-top: 0.75rem; max-width: 34ch; }
.footer-col h4 { font-size: 0.9375rem; margin-bottom: 0.75rem; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.25rem; }
.footer-col a { font-size: 0.9375rem; color: var(--text-2); display: inline-flex; align-items: center; min-height: 32px; }
.footer-col a:hover { color: var(--brand); }
.footer-legal {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem 1.5rem;
  margin-top: 2rem; padding-top: 1.25rem; border-top: 1px solid var(--border-2);
  font-size: 0.875rem; color: var(--text-3);
}
.footer-legal ul { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
.footer-legal a { color: var(--text-2); display: inline-flex; align-items: center; min-height: 32px; }
.footer-legal a:hover { color: var(--brand); }
.footer-compact { margin-top: 3rem; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > :first-child { grid-column: 1 / -1; } }
@media (max-width: 420px) { .footer-grid { grid-template-columns: 1fr; } }

/* ---------- Landing hero: the banknote ---------- */
.hero-wrap { padding-top: 2.5rem; }
.banknote {
  --g-size: 95%; --g-right: -12%; --g-top: -25%;
  background: var(--note-bg); color: var(--note-ink);
  border-radius: var(--r-lg); padding: 0.75rem;
}
.banknote-inner {
  position: relative; z-index: 1;
  border: 1px solid var(--note-line); border-radius: var(--r-md);
  outline: 1px solid var(--brass); outline-offset: -5px;
  padding: clamp(1.5rem, 4vw, 3.5rem);
  display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 2.5rem; align-items: end;
  min-height: 420px;
}
.banknote h1 {
  color: var(--note-ink); font-size: clamp(2.25rem, 1.4rem + 4vw, 4.25rem);
  line-height: 1.02; letter-spacing: -0.035em; max-width: 14ch;
}
.banknote .lede { color: var(--note-ink-2); font-size: 1.125rem; margin-top: 1.25rem; max-width: 46ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
.banknote .btn-note { background: var(--note-ink); color: #0B3F39; border-color: var(--note-ink); }
.banknote .btn-note:hover { background: #fff; color: #0B3F39; border-color: #fff; }
.banknote .btn-outline-note { background: transparent; color: var(--note-ink); border-color: var(--note-ink-2); }
.banknote .btn-outline-note:hover { background: rgba(241,248,246,0.12); color: var(--note-ink); border-color: var(--note-ink); }
.banknote :focus-visible { outline-color: var(--note-ink); }

.note-meta { border-top: 1px solid var(--note-line); }
.note-meta dl { display: grid; grid-template-columns: auto 1fr; gap: 0.5rem 1rem; padding-top: 1rem; font-size: 0.875rem; }
.note-meta dt { color: var(--note-ink-2); }
.note-meta dd { color: var(--note-ink); text-align: right; font-weight: 500; }
.note-meta .mono { font-size: 0.9375rem; }
.note-denom { font-family: var(--font-display); font-weight: 800; font-size: 1.125rem; color: var(--note-ink); margin-bottom: 0.75rem; letter-spacing: -0.01em; }

@media (max-width: 820px) {
  .banknote-inner { grid-template-columns: 1fr; gap: 2rem; min-height: 0; }
  .banknote .btn { min-height: 44px; }
}

/* ---------- Landing sections ---------- */
.section { padding: 4.5rem 0 0; }
.section-head { max-width: 60ch; margin-bottom: 2rem; }
.section-head p { margin-top: 0.75rem; font-size: 1.0625rem; }

.service-list { border-top: 2px solid var(--ink); }
[data-theme="dark"] .service-list { border-top-color: var(--border-2); }
.service {
  display: grid; grid-template-columns: 56px minmax(0, 14rem) minmax(0, 1fr);
  gap: 1rem 1.5rem; align-items: start;
  padding: 1.5rem 0; border-bottom: 1px solid var(--border);
}
.service svg { width: 28px; height: 28px; color: var(--brand); fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; margin-top: 0.15rem; }
.service h3 { font-size: 1.25rem; }
.service p { font-size: 1rem; }
@media (max-width: 720px) {
  .service { grid-template-columns: 40px 1fr; }
  .service p { grid-column: 2; }
}

.steps { list-style: none; counter-reset: step; max-width: 72ch; border-left: 1px solid var(--border-2); margin-left: 0.75rem; }
.steps li { counter-increment: step; position: relative; padding: 0 0 1.75rem 2rem; }
.steps li:last-child { padding-bottom: 0; }
.steps li::before {
  content: counter(step); position: absolute; left: -0.75rem; top: 0;
  width: 1.5rem; height: 1.5rem; border-radius: var(--r-sm);
  background: var(--brand); color: var(--on-brand);
  font-family: var(--font-display); font-weight: 700; font-size: 0.875rem;
  display: flex; align-items: center; justify-content: center;
}
.steps h3 { font-size: 1.125rem; margin-bottom: 0.25rem; }

.app-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 3rem; align-items: center; }
.app-split .actions { margin-top: 1.5rem; }
.ledger-preview { background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 1.25rem 1.25rem 0.5rem; }
.ledger-preview h3 { font-size: 1rem; margin-bottom: 0.25rem; }
.ledger-preview .bal { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 0.75rem; border-bottom: 1px solid var(--border); font-size: 0.875rem; color: var(--text-3); }
.ledger-preview .bal strong { font-family: var(--font-display); font-size: 1.5rem; color: var(--text-1); }
.ledger-preview td, .ledger-preview th { padding-left: 0; padding-right: 0; }
.ledger-preview td:last-child, .ledger-preview th:last-child { text-align: right; }
.ledger-preview .in { color: var(--green-text); }
.ledger-preview tbody tr:hover td { background: transparent; }
@media (max-width: 820px) { .app-split { grid-template-columns: 1fr; gap: 2rem; } }

.closing { margin-top: 4.5rem; border-top: 2px solid var(--ink); padding-top: 2rem; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.25rem 2rem; }
[data-theme="dark"] .closing { border-top-color: var(--border-2); }
.closing h2 { max-width: 22ch; }
.closing .btn { min-height: 44px; }

/* ---------- Prose pages ---------- */
.page-main { padding-top: 3rem; }
.prose { max-width: 72ch; }
.prose h1 { margin-bottom: 0.75rem; }
.prose .subtitle { font-size: 1.125rem; color: var(--text-2); margin-bottom: 2rem; max-width: 60ch; }
.prose h2 { margin-top: 2.5rem; margin-bottom: 0.75rem; padding-top: 1.25rem; border-top: 1px solid var(--border); }
.prose h2:first-of-type { margin-top: 2rem; }
.prose h3 { margin-bottom: 0.25rem; }
.prose p { margin-bottom: 1rem; max-width: 72ch; }
.prose ul { margin: 0 0 1rem 1.25rem; color: var(--text-2); }
.prose li { margin-bottom: 0.375rem; }
.prose .updated { font-size: 0.875rem; color: var(--text-3); margin-bottom: 1.5rem; }

/* Search (blog, careers) */
.search-container { margin: 1.5rem 0 2rem; max-width: 72ch; }
.search-box { display: flex; align-items: flex-end; gap: 0.5rem; }
.search-box .field { flex: 1; }
.search-box label { margin-bottom: 0.375rem; }
.search-box button { min-height: 42px; }
.search-results-info {
  margin-top: 0.75rem; padding: 0.625rem 0.875rem; border: 1px solid var(--border);
  border-left: 4px solid var(--brand); border-radius: var(--r-md);
  background: var(--surface-2); color: var(--text-2); font-size: 0.9375rem;
}
.search-results-info strong { color: var(--text-1); }
.hidden { display: none !important; }
.no-results { padding: 2rem 0; color: var(--text-3); }

/* Blog entries */
.blog-post { border-top: 1px solid var(--border); padding: 1.5rem 0; }
.blog-post:first-of-type { border-top: 2px solid var(--ink); }
[data-theme="dark"] .blog-post:first-of-type { border-top-color: var(--border-2); }
.blog-post h3 { font-size: 1.375rem; margin-bottom: 0.25rem; }
.blog-post .meta { font-size: 0.875rem; color: var(--text-3); margin-bottom: 0.75rem; }
.blog-post .tag { display: inline-block; margin-right: 0.5rem; padding: 0.05rem 0.5rem; border-radius: var(--r-sm); background: var(--verdigris-lo); color: var(--brand-dark); font-weight: 600; }
[data-theme="dark"] .blog-post .tag { color: var(--brand-light); }
.blog-post p:last-child { margin-bottom: 0; }
.blog-categories { margin-top: 2.5rem; padding: 1rem 1.25rem; border: 1px solid var(--border); border-radius: var(--r-lg); background: var(--surface); }
.blog-categories p { margin-bottom: 0.375rem; }

/* Careers */
.opening { border-top: 1px solid var(--border); padding: 1.5rem 0; }
.opening:first-of-type { border-top: 2px solid var(--ink); }
[data-theme="dark"] .opening:first-of-type { border-top-color: var(--border-2); }
.opening-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.25rem 1rem; margin-bottom: 0.5rem; }
.opening h3 { font-size: 1.375rem; margin-bottom: 0; }
.department { font-size: 0.875rem; font-weight: 600; color: var(--text-3); }
.perks { list-style: none; margin: 0 0 1rem; border-top: 1px solid var(--border); }
.perks li { padding: 0.75rem 0; border-bottom: 1px solid var(--border); margin: 0; }
.perks strong { color: var(--text-1); display: block; }

/* Compliance */
.cert-list { border-top: 2px solid var(--ink); margin: 1rem 0 2rem; }
[data-theme="dark"] .cert-list { border-top-color: var(--border-2); }
.cert-row { display: grid; grid-template-columns: minmax(0, 13rem) minmax(0, 1fr); gap: 0.5rem 1.5rem; padding: 1.25rem 0; border-bottom: 1px solid var(--border); }
.cert-row h3 { font-size: 1.125rem; }
.cert-row .badge { margin-top: 0.5rem; }
.cert-row p { margin-bottom: 0; }
@media (max-width: 640px) { .cert-row { grid-template-columns: 1fr; } }

/* ---------- Landing chat widget ---------- */
.chat-widget { position: fixed; right: 1.25rem; bottom: 1.25rem; z-index: 1500; font-family: var(--font-body); }
.chat-toggle {
  position: relative; width: 56px; height: 56px; padding: 0; min-height: 0;
  border: 1px solid var(--brand-dark); border-radius: var(--r-lg);
  background: var(--brand); color: var(--on-brand); cursor: pointer;
  box-shadow: var(--shadow-md);
}
.chat-toggle:hover { background: var(--brand-dark); }
.chat-toggle svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.chat-badge {
  position: absolute; top: -6px; right: -6px; min-width: 20px; height: 20px; padding: 0 4px;
  border-radius: var(--r-sm); background: var(--stamp); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 0.75rem; font-weight: 700;
}
.chat-tooltip {
  position: absolute; right: 66px; top: 50%; transform: translateY(-50%);
  background: var(--ink); color: #F4FAF8; padding: 0.375rem 0.75rem;
  border-radius: var(--r-sm); font-size: 0.8125rem; font-weight: 600; white-space: nowrap;
  opacity: 0; visibility: hidden; pointer-events: none; transition: opacity var(--dur-fast) ease;
}
.chat-toggle:hover .chat-tooltip, .chat-toggle:focus-visible .chat-tooltip { opacity: 1; visibility: visible; }
.chat-widget.chat-open .chat-tooltip { opacity: 0 !important; visibility: hidden !important; }
.chat-window {
  position: absolute; right: 0; bottom: 68px;
  width: min(380px, calc(100vw - 2.5rem));
  height: min(520px, calc(100vh - 7rem)); max-height: calc(100vh - 7rem);
  background: var(--surface); border: 1px solid var(--border-2); border-radius: var(--r-lg);
  box-shadow: var(--shadow-xl); overflow: hidden; display: flex; flex-direction: column;
}
.chat-window.opening { animation: chatOpen var(--dur-mid) var(--ease); }
.chat-window.closing { animation: chatClose var(--dur-mid) ease-in; }
@keyframes chatOpen { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes chatClose { from { opacity: 1; transform: none; } to { opacity: 0; transform: translateY(8px); } }
.chat-header { background: var(--note-bg); color: var(--note-ink); padding: 0.875rem 1rem; display: flex; align-items: center; justify-content: space-between; }
.chat-agent-info { display: flex; align-items: center; gap: 0.75rem; }
.agent-avatar { width: 34px; height: 34px; border-radius: var(--r-md); background: rgba(241,248,246,0.14); display: flex; align-items: center; justify-content: center; }
.agent-avatar svg, .message-avatar svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.agent-name { font-size: 0.9375rem; font-weight: 600; }
.agent-status { font-size: 0.8125rem; color: var(--note-ink-2); }
.chat-close { min-height: 36px; width: 36px; padding: 0; background: transparent; border: 1px solid transparent; color: var(--note-ink); border-radius: var(--r-md); }
.chat-close:hover { background: rgba(241,248,246,0.14); }
.chat-close svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; }
.chat-mode-label { padding: 0.5rem 1rem; background: var(--surface-2); border-bottom: 1px solid var(--border); font-size: 0.8125rem; color: var(--text-2); }
.chat-messages { flex: 1; padding: 1rem; overflow-y: auto; background: var(--bg); display: flex; flex-direction: column; gap: 0.875rem; }
.message { display: flex; align-items: flex-start; gap: 0.5rem; max-width: 88%; }
.message.user-message { align-self: flex-end; flex-direction: row-reverse; }
.message-avatar { width: 28px; height: 28px; border-radius: var(--r-sm); flex-shrink: 0; display: flex; align-items: center; justify-content: center; background: var(--surface-3); color: var(--text-2); }
.user-message .message-avatar { background: var(--verdigris-lo); color: var(--brand-dark); }
[data-theme="dark"] .user-message .message-avatar { color: var(--brand-light); }
.message-text { padding: 0.625rem 0.875rem; border-radius: var(--r-md); font-size: 0.9375rem; line-height: 1.5; background: var(--surface); border: 1px solid var(--border); color: var(--text-1); overflow-wrap: anywhere; }
.user-message .message-text { background: var(--brand); border-color: var(--brand); color: var(--on-brand); }
.message-time { margin-top: 0.25rem; font-size: 0.75rem; color: var(--text-3); }
.chat-input { padding: 0.75rem 1rem; background: var(--surface); border-top: 1px solid var(--border); }
.input-container { display: flex; align-items: center; gap: 0.5rem; }
#landingChatMessageInput { flex: 1; min-width: 0; }
#landingSendChatBtn { width: 44px; min-height: 42px; height: 42px; padding: 0; background: var(--brand); color: var(--on-brand); border: 1px solid var(--brand); border-radius: var(--r-md); flex-shrink: 0; }
#landingSendChatBtn:hover:not(:disabled) { background: var(--brand-dark); }
#landingSendChatBtn svg { width: 20px; height: 20px; fill: currentColor; stroke: none; }
.typing-indicator { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.5rem; font-size: 0.8125rem; color: var(--text-3); }
.typing-dots { display: flex; gap: 3px; }
.typing-dots span { width: 5px; height: 5px; background: var(--text-3); border-radius: 50%; animation: typing 1.4s infinite ease-in-out; }
.typing-dots span:nth-child(1) { animation-delay: -0.32s; }
.typing-dots span:nth-child(2) { animation-delay: -0.16s; }
@keyframes typing { 0%,80%,100% { transform: scale(0); } 40% { transform: scale(1); } }
@media (max-width: 480px) {
  .chat-widget { right: 1rem; bottom: 1rem; }
  .chat-window { width: calc(100vw - 2rem); }
  .chat-close { width: 44px; min-height: 44px; }
}