/* ==========================================================================
   SwiftIban
   Palette borrows from cheque safety paper: a cool blue-grey tint, deep ink,
   one electric indigo for anything that transmits, and brass reserved
   exclusively for the bank-code segment — the part that produces the answer.
   ========================================================================== */

:root {
  --ink: #0b1a2e;
  --ink-2: #3d4f66;
  --ink-3: #6b7c91;
  --paper: #e9eef1;
  --surface: #ffffff;
  --line: #cbd6de;
  --line-soft: #e2e9ee;

  --signal: #2e2bd6;
  --signal-ink: #1f1c9e;
  --signal-soft: #e8e8fc;

  --brass: #a9761f;
  --brass-soft: #f7edda;

  --valid: #0f7a55;
  --alert: #b23a2f;

  --display: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --sans: "IBM Plex Sans", "IBM Plex Sans Arabic", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --wrap: 68rem;
  --narrow: 44rem;
  --radius: 4px;

  --shadow: 0 1px 2px rgb(11 26 46 / 0.06), 0 8px 24px -12px rgb(11 26 46 / 0.18);
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  font-feature-settings: "kern", "liga";
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: stretch;
}

#main {
  flex: 1;
  display:flex;
  flex-direction: column;
}

/* Arabic gets no serif display face; the sans carries both roles. */
html[lang="ar"] { --display: "IBM Plex Sans Arabic", var(--sans); }

img, svg { max-width: 100%; }

/* Author `display` rules outrank the UA sheet's `[hidden] { display: none }`
   no matter the specificity, so .decomp's flex would keep a hidden element
   visible. Restate it here. */
[hidden] { display: none !important; }

a { color: var(--signal-ink); text-decoration-thickness: 1px; text-underline-offset: 0.2em; }
a:hover { color: var(--signal); }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  inset-inline-start: -9999px;
  top: 0;
  z-index: 20;
  background: var(--ink);
  color: #fff;
  padding: 0.6rem 1rem;
  text-decoration: none;
}
.skip:focus { inset-inline-start: 0; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: 1.25rem;
}
.wrap.narrow { max-width: var(--narrow); }
.center { text-align: center; }

/* ── header ─────────────────────────────────────────────────────────── */

.site-head {
  background: var(--surface);
  border-block-end: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.head-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 4rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  margin-inline-end: auto;
}
.brand-mark { color: var(--signal); display: flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text b { font-family: var(--display); font-size: 1.1rem; letter-spacing: -0.01em; }
.brand-text small { font-size: 0.7rem; color: var(--ink-3); letter-spacing: 0.02em; }

.site-nav { display: flex; gap: 1.25rem; }
.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.9rem;
  padding-block: 0.4rem;
  border-block-end: 2px solid transparent;
}
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { color: var(--ink); border-block-end-color: var(--signal); }

.lang { position: relative; }
.lang-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font: inherit;
  font-size: 0.85rem;
  color: var(--ink-2);
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}
.lang-btn:hover { border-color: var(--ink-3); color: var(--ink); }

.lang-list {
  position: absolute;
  inset-inline-end: 0;
  top: calc(100% + 0.4rem);
  margin: 0;
  padding: 0.3rem;
  list-style: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 10rem;
  max-height: 60vh;
  overflow-y: auto;
}
.lang-list a {
  display: block;
  padding: 0.4rem 0.6rem;
  text-decoration: none;
  color: var(--ink-2);
  font-size: 0.9rem;
  border-radius: 2px;
}
.lang-list a:hover { background: var(--paper); color: var(--ink); }
.lang-list a[aria-current="true"] { color: var(--signal-ink); font-weight: 500; }

/* ── hero ───────────────────────────────────────────────────────────── */

.hero {
  background: var(--surface);
  border-block-end: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
/* Security-tint ruling, the one piece of texture on the page. */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    -60deg,
    transparent 0 7px,
    rgb(46 43 214 / 0.035) 7px 8px
  );
  pointer-events: none;
}
.hero-inner { position: relative; padding-block: 3.5rem 3rem; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.9rem;
}

.hero h1,
.page-h {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 0.9rem;
  color: var(--ink);
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.1rem); max-width: 18ch; }
.page-h { font-size: clamp(1.75rem, 4vw, 2.4rem); }

.lede {
  font-size: 1.08rem;
  color: var(--ink-2);
  max-width: 52ch;
  margin: 0 0 2rem;
}

/* ── lookup ─────────────────────────────────────────────────────────── */

/**
 * Form and result are grid siblings. Below the breakpoint they stack in
 * source order — form, then result — which is also the order someone works
 * through them. Above it they sit side by side so the result lands next to
 * the IBAN that produced it instead of pushing the page down.
 */
.lookup-panel {
  display: grid;
  gap: 1.75rem;
  align-items: start;
  margin-block-end: 2rem;
}

@media (min-width: 60rem) {
  .lookup-panel {
    grid-template-columns: minmax(0, auto) minmax(0, max-content);
    gap: 2.5rem;
  }
}

.lookup { margin: 0; max-width: 40rem; }

.lookup-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-block-end: 0.5rem;
}

.field {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.field input {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--mono);
  font-size: clamp(1rem, 2.6vw, 1.25rem);
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.85rem 0.9rem;
  direction: ltr;
  text-align: start;
}
.field input::placeholder { color: var(--ink-3); letter-spacing: 0; font-family: var(--sans); }
.field input:focus-visible { border-color: var(--signal); outline-offset: 1px; }
.field input[data-state="valid"] { border-color: var(--valid); }
.field input[data-state="error"] { border-color: var(--alert); }

.btn {
  flex: 0 0 auto;
  font: inherit;
  font-weight: 500;
  color: #fff;
  background: var(--signal);
  border: 1px solid var(--signal);
  border-radius: var(--radius);
  padding: 0.85rem 1.4rem;
  cursor: pointer;
  white-space: nowrap;
}
.btn:hover { background: var(--signal-ink); border-color: var(--signal-ink); }
.btn[aria-busy="true"] { opacity: 0.65; cursor: progress; }

.hint {
  min-height: 1.4rem;
  margin: 0.6rem 0 0;
  font-size: 0.87rem;
  color: var(--ink-3);
}
.hint[data-state="valid"] { color: var(--valid); }
.hint[data-state="error"] { color: var(--alert); }

.example-line { margin: 0.9rem 0 0; font-size: 0.87rem; color: var(--ink-3); }
.linkish {
  font: inherit;
  background: none;
  border: 0;
  padding: 0;
  color: var(--signal-ink);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}

/* ── the signature: IBAN decomposition ──────────────────────────────── */

.decomp {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  direction: ltr;
  align-items: flex-start;
}

.seg {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding-block-end: 0.15rem;
}

.seg-val {
  font-family: var(--mono);
  font-size: clamp(0.95rem, 2.4vw, 1.35rem);
  letter-spacing: 0.05em;
  color: var(--ink);
  border-block-end: 2px solid var(--line);
  padding-block-end: 0.25rem;
}

.seg-lbl {
  font-family: var(--sans);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  white-space: nowrap;
}

.seg--country .seg-val,
.seg--check .seg-val { color: var(--ink-2); }

.seg.is-key .seg-val {
  color: var(--brass);
  border-block-end-color: var(--brass);
  background: var(--brass-soft);
  padding-inline: 0.3rem;
  margin-inline: -0.3rem;
}
.seg.is-key .seg-lbl { color: var(--brass); font-weight: 500; }

.decomp-live { margin-block-start: 1.5rem; }

.hero-demo {
  border-block-start: 1px solid var(--line-soft);
  padding-block-start: 1.75rem;
  margin-block-start: 0.5rem;
}
.demo-cap {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.9rem;
}
.demo-note {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--brass);
}
.demo-note::before {
  content: "";
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  background: var(--brass);
  margin-inline-end: 0.45rem;
  vertical-align: baseline;
}

.demo-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.demo-iban {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin: 0 0 1.25rem;
  direction: ltr;
  text-align: start;
}
.fineprint { font-size: 0.8rem; color: var(--ink-3); margin-block-start: 0.75rem; }

/* ── result ─────────────────────────────────────────────────────────── */

.result { margin: 0; }

/**
 * The placeholder exists to stop the second column reading as a rendering
 * fault before first use. Stacked layouts do not have that problem, so it
 * only appears once the columns do.
 */
.result[data-state="empty"] { display: none; }

@media (min-width: 60rem) {
  .result[data-state="empty"] { display: block; }
}

.result-empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  color: var(--ink-3);
}
.result-empty p:last-child { margin: 0; font-size: 0.92rem; }

.result-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-inline-start: 3px solid var(--signal);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.result-card.is-error { border-inline-start-color: var(--alert); }

.result-cap {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 0.6rem;
}

.bic-row { display: flex; align-items: center; gap: 0.75rem; flex-wrap: wrap; }
.bic {
  font-family: var(--mono);
  font-size: clamp(1.5rem, 5vw, 2.1rem);
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--signal-ink);
  margin: 0;
  direction: ltr;
}
.copy-btn {
  font: inherit;
  font-size: 0.8rem;
  background: var(--signal-soft);
  color: var(--signal-ink);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0.3rem 0.7rem;
  cursor: pointer;
}
.copy-btn:hover { border-color: var(--signal); }

.result-rows {
  margin: 1.25rem 0 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.5rem 1.25rem;
  font-size: 0.92rem;
}
.result-rows dt { color: var(--ink-3); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; padding-block-start: 0.15rem; }
.result-rows dd { margin: 0; color: var(--ink); }

/* Sections repeat inside one card, so a title that follows content needs
   air above it; the first one already sits under the card padding. */
.result-card .result-cap + .result-rows,
.result-card .result-cap + .result-table-scroll { margin-block-start: 0.5rem; }
.result-rows + .result-cap,
.result-table-scroll + .result-cap { margin-block-start: 1.5rem; }

.result-table-scroll { overflow-x: auto; }

.result-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin-block-start: 0.5rem;
}
.result-table th,
.result-table td {
  text-align: start;
  padding: 0.45rem 0.65rem;
  border-block-end: 1px solid var(--line-soft);
}
.result-table thead th {
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
  border-block-end: 1px solid var(--line);
  white-space: nowrap;
}
.result-table td { color: var(--ink); }
.result-table tbody tr:last-child td { border-block-end: 0; }

.result-note {
  margin: 1.25rem 0 0;
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--line-soft);
  font-size: 0.83rem;
  color: var(--ink-3);
}

/* ── bands ──────────────────────────────────────────────────────────── */

.band { padding-block: 3.5rem; }
.band--top { padding-block: 3rem 2rem; background: var(--surface); border-block-end: 1px solid var(--line); flex:1; }
.band--tint { background: var(--surface); border-block: 1px solid var(--line); }
.band--cta { background: var(--surface); border-block: 1px solid var(--line); }

.sec-h {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  margin: 0 0 0.75rem;
}
.sec-p { color: var(--ink-2); max-width: 54ch; margin: 0 0 1.75rem; }

.more { margin-block-start: 1.75rem; }
.arrow { font-size: 0.95rem; text-decoration: none; font-weight: 500; }
.arrow::after { content: " →"; }
html[dir="rtl"] .arrow::after { content: " ←"; }
.arrow:hover { text-decoration: underline; }

/* ── steps ──────────────────────────────────────────────────────────── */

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  counter-reset: step;
}
.step { border-block-start: 2px solid var(--line); padding-block-start: 1rem; }
.step-n {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--signal);
  letter-spacing: 0.1em;
}
.step h3 { font-size: 1rem; margin: 0.4rem 0 0.4rem; font-weight: 600; }
.step p { margin: 0; font-size: 0.92rem; color: var(--ink-2); }

/* ── tiles ──────────────────────────────────────────────────────────── */

.tiles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fill, minmax(12rem, 1fr));
}
.tile {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.9rem 1rem;
  background: var(--paper);
  border: 1px solid transparent;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--ink);
  height: 100%;
}
.tile:hover { border-color: var(--signal); background: var(--signal-soft); }
.tile-cc { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; color: var(--ink-3); }
.tile-name { font-weight: 500; }
.tile-len { font-size: 0.78rem; color: var(--ink-3); }

/* ── table ──────────────────────────────────────────────────────────── */

.table-scroll { overflow-x: auto; margin-block-start: 2rem; }
.ctable { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.ctable th,
.ctable td { text-align: start; padding: 0.65rem 0.75rem; border-block-end: 1px solid var(--line-soft); }
.ctable thead th {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  border-block-end: 1px solid var(--line);
  font-weight: 500;
}
.ctable tbody th { font-weight: 500; }
.ctable tbody tr:hover { background: var(--surface); }
.ctable code { font-family: var(--mono); font-size: 0.85rem; color: var(--ink-3); }

/* ── facts ──────────────────────────────────────────────────────────── */

.facts {
  margin: 0;
  display: grid;
  gap: 0;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  border-block-start: 1px solid var(--line);
}
.fact {
  padding: 1rem 0;
  border-block-end: 1px solid var(--line-soft);
  padding-inline-end: 1.5rem;
}
.fact dt { font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-3); }
.fact dd { margin: 0.25rem 0 0; font-weight: 500; }

/* ── q&a ────────────────────────────────────────────────────────────── */

.qa {
  border-block-end: 1px solid var(--line);
  padding-block: 1rem;
}
.qa summary {
  cursor: pointer;
  font-weight: 500;
  font-size: 1rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after {
  content: "+";
  font-family: var(--mono);
  color: var(--signal);
  flex: 0 0 auto;
}
.qa[open] summary::after { content: "−"; }
.qa p { margin: 0.75rem 0 0; color: var(--ink-2); max-width: 62ch; font-size: 0.95rem; }

/* ── misc ───────────────────────────────────────────────────────────── */

.crumbs { font-size: 0.82rem; color: var(--ink-3); margin-block-end: 1rem; display: flex; gap: 0.5rem; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { text-decoration: underline; }

.pills { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pills a {
  display: inline-block;
  padding: 0.35rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 100px;
  text-decoration: none;
  font-size: 0.87rem;
  color: var(--ink-2);
}
.pills a:hover { border-color: var(--signal); color: var(--signal-ink); }

.prose p { max-width: 64ch; color: var(--ink-2); margin-block: 0 1.1rem; }

.qa-list { margin-block-start: 2rem; }

/* ── footer ─────────────────────────────────────────────────────────── */

.site-foot {
  background: var(--ink);
  color: #a9b8c9;
  padding-block: 3rem 2rem;
  font-size: 0.87rem;
}
.foot-inner {
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr);
}
.foot-brand { font-family: var(--display); font-size: 1.1rem; color: #fff; margin: 0 0 0.6rem; }
.foot-note p { margin: 0 0 0.75rem; max-width: 44ch; }
.foot-copy { color: #6f8199; font-size: 0.8rem; }
.foot-col h2 { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: #6f8199; margin: 0 0 0.75rem; font-weight: 500; }
.foot-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.4rem; }
.foot-col a { color: #a9b8c9; text-decoration: none; }
.foot-col a:hover { color: #fff; text-decoration: underline; }
.foot-langs { grid-template-columns: repeat(2, minmax(0, 1fr)); }

/* ── responsive ─────────────────────────────────────────────────────── */

@media (max-width: 52rem) {
  .site-nav { display: none; }
  .foot-inner { grid-template-columns: 1fr; }
  .field { flex-direction: column; }
  .btn { width: 100%; }
}

@media (prefers-reduced-motion: no-preference) {
  .seg { animation: seg-in 260ms cubic-bezier(0.2, 0.7, 0.3, 1) both; }
  @keyframes seg-in {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: none; }
  }
  .result-card { animation: card-in 300ms cubic-bezier(0.2, 0.7, 0.3, 1) both; }
  @keyframes card-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: none; }
  }
}

@media print {
  .site-head, .site-foot, .lookup, .skip { display: none; }
  body { background: #fff; }
}