/* ==========================================================================
   K-Exchange | Korean Currency Exchange (koreancurrencyexchange.com)
   Official Commercial Bank Portal Design System
   Clean, Authoritative, Professional Banking Aesthetic - Light & Navy Theme
   ========================================================================== */

:root {
  /* Bank Corporate Color Palette (Trust & Stability) */
  --bank-navy: #002d62;          /* Deep Corporate Banking Navy (Shinhan / Vietcombank) */
  --bank-navy-dark: #001f44;
  --bank-navy-light: #0b3c78;
  --bank-blue: #0056b3;          /* Primary Action Blue */
  --bank-blue-hover: #004085;
  --bank-gold: #b3822a;          /* Official Gold Seal / Rates */
  --bank-gold-light: #fef7ec;
  --bank-green: #107c41;         /* Verified & Approved Green */
  --bank-green-light: #e6f4ea;
  
  /* Neutral Banking Backgrounds */
  --bg-page: #f4f6f9;            /* Institutional Light Grey */
  --bg-white: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-accent: #edf2f7;

  /* Typography Colors */
  --text-dark: #0f172a;          /* Charcoal Black */
  --text-body: #334155;          /* Standard Body Grey */
  --text-muted: #64748b;         /* Caption / Muted */
  --text-light: #ffffff;

  /* Crisp Banking Borders */
  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-strong: #94a3b8;
  --border-focus: #0056b3;

  /* Subtle Professional Box Shadows */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'IBM Plex Sans', monospace;
  --font-heading: 'Plus Jakarta Sans', sans-serif;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  background-color: var(--bg-page);
  color: var(--text-body);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  line-height: 1.55;
  background-color: var(--bg-page);
  color: var(--text-body);
}

a {
  color: var(--bank-blue);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  text-decoration: underline;
  color: var(--bank-blue-hover);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text-dark);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Top Institutional Utility Bar
   ========================================================================== */
.top-utility-bar {
  background-color: var(--bank-navy-dark);
  color: #cbd5e1;
  font-size: 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.45rem 0;
}

.utility-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.utility-left {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.utility-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.utility-badge {
  background: rgba(255, 255, 255, 0.15);
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.03em;
}

.utility-right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

/* ==========================================================================
   Main Bank Header & Navigation
   ========================================================================== */
.site-header {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Bank Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  text-decoration: none;
}

.logo-shield {
  width: 44px;
  height: 44px;
  background: var(--bank-navy);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 45, 98, 0.2);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-title {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--bank-navy);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.logo-title span {
  color: var(--bank-gold);
}

.logo-subtitle {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* 3-Dots Mobile Menu Toggle Button (Kebab) */
.mobile-dots-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-medium);
  align-items: center;
  justify-content: center;
  color: var(--bank-navy);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-card);
  position: relative;
  z-index: 102;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.mobile-dots-btn:hover {
  background-color: #ffffff;
  border-color: var(--bank-blue);
  color: var(--bank-blue);
}

.mobile-dots-btn:active,
.mobile-dots-btn.active {
  background-color: var(--bank-navy);
  color: #ffffff;
  border-color: var(--bank-navy);
  box-shadow: 0 0 0 3px rgba(0, 45, 98, 0.15);
}

.dots-icon-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3.5px;
  transition: transform 0.25s ease;
}

.kebab-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: currentColor;
  display: block;
  transition: all 0.25s ease;
}

.mobile-dots-btn.active .dots-icon-box {
  transform: rotate(90deg);
}

.mobile-dots-btn.active .kebab-dot {
  background-color: #ffffff;
}

/* Nav Menu */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-body);
  text-decoration: none;
  padding: 0.5rem 0;
  transition: color 0.15s ease;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--bank-navy);
  text-decoration: none;
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--bank-navy);
  border-radius: 2px;
}

/* Elements hidden by default on desktop */
.mobile-menu-header,
.nav-arrow,
.mobile-nav-actions,
.nav-backdrop,
.mobile-table-hint {
  display: none;
}

/* Nav Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

/* Button System (Bank Style) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  transition: all 0.15s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--bank-navy);
  color: #ffffff;
  border: 1px solid var(--bank-navy);
}

.btn-primary:hover {
  background-color: var(--bank-navy-dark);
  color: #ffffff;
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(0, 45, 98, 0.25);
}

.btn-outline {
  background-color: transparent;
  color: var(--bank-navy);
  border: 1px solid var(--border-medium);
}

.btn-outline:hover {
  background-color: var(--bg-subtle);
  border-color: var(--bank-navy);
  color: var(--bank-navy);
  text-decoration: none;
}

.btn-green {
  background-color: var(--bank-green);
  color: #ffffff;
  border: 1px solid var(--bank-green);
}

.btn-green:hover {
  background-color: #0e6b37;
  color: #ffffff;
  text-decoration: none;
  box-shadow: 0 2px 6px rgba(16, 124, 65, 0.25);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 0.85rem 1.85rem;
  font-size: 1rem;
  font-weight: 700;
}

/* ==========================================================================
   Hero & Foreign Exchange Desk
   ========================================================================== */
.hero-section {
  padding: 3rem 0 3.5rem;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg-page) 100%);
  border-bottom: 1px solid var(--border-subtle);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: start;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Bank Official Notice Pill */
.bank-notice-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bank-gold-light);
  border: 1px solid #f2dbb3;
  color: #8c5b05;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 700;
  width: fit-content;
  letter-spacing: 0.02em;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--bank-navy);
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.hero-title span {
  color: var(--bank-blue);
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* Official Rate Banner Card */
.rate-banner-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--bank-navy);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.35rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.rate-banner-header {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--bank-navy);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.rate-banner-body {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-dark);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.rate-highlight-pill {
  background-color: #eff6ff;
  color: var(--bank-blue);
  border: 1px solid #bfdbfe;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.rate-target-pill {
  background-color: var(--bank-green-light);
  color: var(--bank-green);
  border: 1px solid #bbf7d0;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-weight: 800;
}

/* Hero Bank Credentials */
.hero-specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.spec-item {
  display: flex;
  flex-direction: column;
}

.spec-val {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--bank-navy);
  font-family: var(--font-mono);
  line-height: 1.2;
}

.spec-lbl {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 0.5rem;
}

/* ==========================================================================
   Exchange Order Card & VietQR Desk
   ========================================================================== */
.exchange-desk-card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.desk-header {
  background-color: var(--bank-navy);
  color: #ffffff;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.desk-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.desk-badge {
  background: rgba(255, 255, 255, 0.15);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 700;
}

.desk-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

/* Corridor Tab Segment */
.corridor-tabs {
  display: flex;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.25rem;
}

.corridor-btn {
  flex: 1;
  padding: 0.65rem 0.75rem;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
  background: transparent;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.corridor-btn.active {
  background-color: #ffffff;
  color: var(--bank-navy);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Rate Lock Status */
.rate-lock-notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--bank-blue);
}

.rate-lock-notice span strong {
  font-family: var(--font-mono);
}

/* Presets */
.preset-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.2rem;
}

.preset-btn {
  padding: 0.35rem 0.65rem;
  font-size: 0.75rem;
  font-weight: 700;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-body);
  white-space: nowrap;
}

.preset-btn:hover {
  border-color: var(--border-medium);
  background-color: #ffffff;
}

.preset-btn.active {
  background-color: var(--bank-navy);
  color: #ffffff;
  border-color: var(--bank-navy);
}

/* Banking Input Fields */
.bank-input-group {
  background-color: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  transition: border-color 0.15s ease;
}

.bank-input-group:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(0, 86, 179, 0.1);
}

.bank-input-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.bank-input-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.bank-amount-field {
  flex: 1;
  border: none;
  background: transparent;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-dark);
  font-family: var(--font-mono);
  outline: none;
  min-width: 0;
}

.bank-currency-tag {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--bank-navy);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.bank-payout-group {
  background-color: var(--bank-green-light);
  border: 1px solid #bbf7d0;
}

.bank-payout-group .bank-amount-field {
  color: var(--bank-green);
}

/* Receiving Account Strip */
.bank-account-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  font-size: 0.82rem;
}

.account-col {
  display: flex;
  flex-direction: column;
}

.account-lbl {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
}

.account-val {
  font-weight: 700;
  color: var(--text-dark);
  font-family: var(--font-mono);
}

/* Official VietQR Slip */
.vietqr-slip-card {
  background-color: #ffffff;
  border: 2px solid #005baa;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-shadow: var(--shadow-card);
}

.slip-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding-bottom: 0.65rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.vietqr-brand {
  font-size: 1rem;
  font-weight: 800;
  color: #005baa;
  letter-spacing: -0.02em;
}

.vietqr-brand span {
  color: #e51a2e;
}

.napas-tag {
  background-color: #008080;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
}

.bank-tag {
  background-color: #005b38;
  color: #ffffff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
}

#vietqrCanvas {
  display: block;
  width: 180px;
  height: 180px;
}

.slip-details {
  text-align: center;
  margin-top: 0.75rem;
  width: 100%;
}

.slip-beneficiary {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-dark);
}

.slip-account {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 0.15rem;
}

.slip-amount {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bank-green);
  font-family: var(--font-mono);
  margin-top: 0.4rem;
}

.slip-memo {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-top: 0.2rem;
}

/* Official Action Button */
.btn-confirm-transfer {
  background-color: var(--bank-green);
  color: #ffffff;
  padding: 0.95rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 800;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  box-shadow: 0 2px 6px rgba(16, 124, 65, 0.2);
  transition: all 0.15s ease;
}

.btn-confirm-transfer:hover {
  background-color: #0e6b37;
  color: #ffffff;
  box-shadow: 0 4px 10px rgba(16, 124, 65, 0.3);
}

/* ==========================================================================
   Section Layouts
   ========================================================================== */
.section {
  padding: 4.5rem 0;
}

.section-alt {
  background-color: #ffffff;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.section-tag {
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--bank-navy);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.4rem;
}

.section-title {
  font-size: 2.15rem;
  font-weight: 800;
  color: var(--bank-navy);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-body);
  margin-top: 0.75rem;
  line-height: 1.6;
}

/* ==========================================================================
   Official Bank Exchange Rate Board (Table)
   ========================================================================== */
.rate-table-card {
  background-color: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.table-responsive {
  overflow-x: auto;
}

.bank-rate-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.bank-rate-table th {
  background-color: var(--bank-navy);
  color: #ffffff;
  padding: 0.85rem 1.25rem;
  font-weight: 700;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bank-rate-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-dark);
}

.bank-rate-table tr:hover td {
  background-color: var(--bg-subtle);
}

.currency-cell {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
}

.currency-flag {
  font-size: 1.15rem;
}

.rate-num {
  font-family: var(--font-mono);
  font-weight: 700;
}

.rate-highlight-row td {
  background-color: #f0fdf4 !important;
  font-weight: 700;
}

/* ==========================================================================
   Counter Locations Grid
   ========================================================================== */
.counter-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.counter-card {
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all 0.15s ease;
}

.counter-card:hover {
  background-color: #ffffff;
  border-color: var(--border-medium);
  box-shadow: var(--shadow-card);
}

.counter-city {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--bank-navy);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.counter-location {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--bank-blue);
}

.counter-hours {
  font-size: 0.82rem;
  color: var(--text-body);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.counter-badge {
  background-color: var(--bank-green-light);
  color: var(--bank-green);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  width: fit-content;
}

/* ==========================================================================
   How It Works (Bank Steps)
   ========================================================================== */
.bank-steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.bank-step-card {
  background-color: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.step-num-badge {
  width: 36px;
  height: 36px;
  background-color: var(--bank-navy);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
}

.step-card-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--bank-navy);
}

.step-card-desc {
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
}

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-container {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-card {
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-header {
  width: 100%;
  padding: 1.15rem 1.35rem;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--bank-navy);
  text-align: left;
}

.faq-icon {
  font-size: 1.25rem;
  color: var(--bank-blue);
  transition: transform 0.2s ease;
}

.faq-card.active .faq-icon {
  transform: rotate(45deg);
}

.faq-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, padding 0.25s ease;
  font-size: 0.92rem;
  color: var(--text-body);
  line-height: 1.6;
  padding: 0 1.35rem;
}

.faq-card.active .faq-content {
  max-height: 250px;
  padding: 0 1.35rem 1.25rem;
}

/* ==========================================================================
   Official Bank Footer
   ========================================================================== */
.site-footer {
  background-color: var(--bank-navy-dark);
  color: #94a3b8;
  padding: 4rem 0 2rem;
  font-size: 0.85rem;
  border-top: 3px solid var(--bank-navy);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-col-title {
  color: #ffffff;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-nav a {
  color: #cbd5e1;
}

.footer-nav a:hover {
  color: #ffffff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  flex-wrap: wrap;
  gap: 1rem;
}

/* ==========================================================================
   Receipt Upload & 6-Digit Code Redemption Modal (Bank Voucher Style)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 1.5rem;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background-color: #ffffff;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: translateY(15px);
  transition: transform 0.2s ease;
}

.modal-backdrop.open .modal-dialog {
  transform: translateY(0);
}

.modal-dialog-header {
  background-color: var(--bank-navy);
  color: #ffffff;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-dialog-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.modal-close-button {
  background: transparent;
  color: #ffffff;
  font-size: 1.5rem;
  line-height: 1;
  opacity: 0.8;
}

.modal-close-button:hover {
  opacity: 1;
}

.modal-dialog-body {
  padding: 1.75rem;
}

/* Bank Upload Box */
.bank-upload-box {
  border: 2px dashed var(--border-strong);
  background-color: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.15s ease;
}

.bank-upload-box:hover {
  border-color: var(--bank-blue);
  background-color: #ffffff;
}

.upload-icon-shield {
  font-size: 2rem;
  color: var(--bank-blue);
}

.upload-prompt-main {
  font-weight: 700;
  color: var(--text-dark);
}

.upload-prompt-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Image preview */
.slip-preview-box {
  display: none;
  width: 100%;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-medium);
  margin-top: 1rem;
  position: relative;
}

.slip-preview-img {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  display: block;
}

.slip-remove-btn {
  position: absolute;
  top: 6px;
  right: 6px;
  background: rgba(0, 0, 0, 0.65);
  color: #ffffff;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  font-size: 0.85rem;
}

/* 3-Second Bank Loader */
.bank-verification-loader {
  display: none;
  text-align: center;
  padding: 2.5rem 1rem;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.bank-spinner {
  width: 52px;
  height: 52px;
  border: 4px solid var(--border-subtle);
  border-top-color: var(--bank-navy);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loader-bank-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--bank-navy);
}

.loader-bank-sub {
  font-size: 0.85rem;
  color: var(--bank-blue);
  font-family: var(--font-mono);
  font-weight: 600;
}

/* Official Bank Cash Voucher (Receipt Style) */
.official-voucher-panel {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.voucher-bank-seal {
  background-color: var(--bank-green-light);
  border: 1px solid #bbf7d0;
  color: var(--bank-green);
  padding: 0.35rem 1rem;
  border-radius: 9999px;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* 6-Digit Counter Code Boxes (Clean Bank Font) */
.digit-code-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 0.5rem 0;
}

.bank-digit-cell {
  width: 50px;
  height: 64px;
  background-color: var(--bank-navy);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-size: 2.2rem;
  font-weight: 800;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(0, 45, 98, 0.25);
}

.bank-digit-dash {
  font-size: 1.5rem;
  color: var(--bank-navy);
  font-weight: 800;
}

/* User Instruction Callout */
.counter-staff-callout {
  background-color: #fffbeb;
  border: 1px solid #fde68a;
  border-left: 4px solid var(--bank-gold);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.25rem;
  text-align: left;
  width: 100%;
}

.callout-title {
  font-size: 0.92rem;
  font-weight: 800;
  color: #92400e;
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.callout-text {
  font-size: 0.88rem;
  color: #78350f;
  line-height: 1.5;
}

.callout-text strong {
  color: #0f172a;
}

/* Voucher Details List */
.voucher-receipt-table {
  width: 100%;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-size: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.receipt-row {
  display: flex;
  justify-content: space-between;
  color: var(--text-muted);
}

.receipt-row strong {
  color: var(--text-dark);
}

.receipt-row.highlight {
  border-top: 1px dashed var(--border-medium);
  padding-top: 0.5rem;
  margin-top: 0.25rem;
  font-size: 0.95rem;
  font-weight: 800;
}

.receipt-row.highlight strong {
  color: var(--bank-green);
  font-size: 1.15rem;
}

/* Confetti Canvas */
#confettiCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 1999;
}

/* ==========================================================================
   Comprehensive 100% Mobile Responsive System
   ========================================================================== */

/* Mobile Table Scroll Cue */
.mobile-table-hint {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--bank-blue);
  background-color: #eff6ff;
  border: 1px dashed #bfdbfe;
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.75rem;
  margin-bottom: 0.75rem;
  text-align: center;
}

/* Tablet & Mobile Breakpoint (<= 991px) */
@media (max-width: 991px) {
  /* Hide Desktop Nav Actions */
  .nav-actions {
    display: none !important;
  }

  /* Show 3-Dots Mobile Menu Toggle Button */
  .mobile-dots-btn {
    display: flex;
  }

  /* Mobile Dropdown Nav Menu */
  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    width: 100%;
    background-color: #ffffff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0;
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    overflow: hidden;
    border-bottom: 3px solid var(--bank-navy);
    box-shadow: 0 16px 36px rgba(0, 45, 98, 0.2), 0 4px 12px rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 101;
  }

  /* Nav Menu Open State (Triggered by 3-dots button) */
  .nav-menu.open {
    max-height: 85vh;
    opacity: 1;
    visibility: visible;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 0.75rem 1.25rem 1.5rem;
  }

  /* Backdrop Overlay */
  .nav-backdrop {
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
    z-index: 99;
  }

  .nav-backdrop.open {
    opacity: 1;
    pointer-events: auto;
  }

  /* Mobile Menu Header */
  .mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.5rem 0.75rem;
    margin-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
  }

  .mobile-menu-brand {
    font-size: 0.88rem;
    font-weight: 800;
    color: var(--bank-navy);
    letter-spacing: -0.01em;
  }

  .mobile-menu-status {
    background-color: var(--bank-green-light);
    color: var(--bank-green);
    border: 1px solid #bbf7d0;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 0.15rem 0.5rem;
    border-radius: 9999px;
  }

  /* Nav Links in Mobile Dropdown */
  .nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.85rem 0.75rem;
    font-size: 0.96rem;
    font-weight: 600;
    color: var(--text-dark);
    border-bottom: 1px solid #f1f5f9;
    border-radius: 6px;
    transition: all 0.15s ease;
  }

  .nav-link:hover,
  .nav-link:active {
    background-color: var(--bg-subtle);
    color: var(--bank-navy);
    padding-left: 1rem;
  }

  .nav-link.active {
    color: var(--bank-navy);
    background-color: #eff6ff;
    font-weight: 700;
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-arrow {
    display: inline-block;
    font-size: 1.25rem;
    color: var(--text-muted);
    font-weight: 400;
    line-height: 1;
  }

  /* Mobile Actions & Emergency Hotline in Dropdown */
  .mobile-nav-actions {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    margin-top: 0.85rem;
    padding-top: 0.85rem;
    border-top: 1px solid var(--border-subtle);
  }

  .mobile-action-btn {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.92rem;
    justify-content: center;
  }

  .mobile-contact-pill {
    background-color: var(--bg-subtle);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
  }

  .mobile-contact-pill strong {
    color: var(--bank-navy);
  }

  /* Grids */
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .counter-grid,
  .bank-steps-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

/* Smartphone Breakpoint (<= 768px) */
@media (max-width: 768px) {
  /* Container Padding */
  .container {
    padding: 0 1rem;
  }

  /* Top Institutional Bar Compact */
  .top-utility-bar {
    padding: 0.35rem 0;
    font-size: 0.72rem;
  }

  .utility-content {
    justify-content: center;
    gap: 0.65rem;
    text-align: center;
  }

  .utility-left span:last-child {
    display: none; /* Hide long license statement on small screens */
  }

  .utility-right .utility-item:last-child {
    display: none; /* Keep airport 24/7, hotline is in mobile menu */
  }

  /* Header & Brand Logo */
  .navbar {
    height: 64px;
  }

  .logo-shield {
    width: 36px;
    height: 36px;
  }

  .logo-title {
    font-size: 1.15rem;
  }

  .logo-subtitle {
    font-size: 0.65rem;
  }

  /* Hero Section */
  .hero-section {
    padding: 1.5rem 0 2.25rem;
  }

  .hero-title {
    font-size: clamp(1.55rem, 5.5vw, 2.1rem);
    line-height: 1.25;
  }

  .hero-subtitle {
    font-size: 0.95rem;
    line-height: 1.55;
  }

  /* Highlight Rate Banner */
  .rate-banner-card {
    padding: 0.85rem 1rem;
  }

  .rate-banner-body {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    font-size: 0.88rem;
  }

  /* Hero Operational Specs Grid (2x2) */
  .hero-specs-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
    padding: 1rem 0;
  }

  .spec-val {
    font-size: 1.25rem;
  }

  .spec-lbl {
    font-size: 0.72rem;
  }

  /* Hero Buttons */
  .hero-actions {
    flex-direction: column;
    width: 100%;
    gap: 0.65rem;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  /* Exchange Desk Card */
  .exchange-desk-card {
    border-radius: var(--radius-md);
  }

  .desk-header {
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
  }

  .desk-body {
    padding: 1.15rem 0.9rem;
  }

  .corridor-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .corridor-btn {
    padding: 0.65rem 0.4rem;
    font-size: 0.82rem;
    justify-content: center;
  }

  .rate-lock-notice {
    flex-direction: row;
    justify-content: space-between;
    font-size: 0.78rem;
    padding: 0.5rem 0.75rem;
  }

  /* 2x2 Preset Buttons for easy thumb tapping */
  .preset-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.4rem;
  }

  .preset-btn {
    padding: 0.55rem 0.4rem;
    font-size: 0.78rem;
    justify-content: center;
    text-align: center;
  }

  /* Inputs (16px font prevents iOS Safari auto-zoom) */
  .bank-amount-field {
    font-size: 1.25rem !important;
    padding: 0.65rem 0.75rem;
  }

  .bank-currency-tag {
    padding: 0.45rem 0.65rem;
    font-size: 0.82rem;
  }

  .bank-account-strip {
    flex-direction: column;
    gap: 0.45rem;
    padding: 0.65rem 0.75rem;
  }

  .vietqr-slip-card {
    padding: 0.85rem 0.75rem;
  }

  #vietqrCanvas {
    max-width: 155px;
    height: auto;
    margin: 0 auto;
    display: block;
  }

  .slip-amount {
    font-size: 1.2rem;
  }

  .btn-confirm-transfer {
    font-size: 0.92rem;
    padding: 0.85rem 1rem;
    width: 100%;
  }

  /* Section Headings */
  .section {
    padding: 2.25rem 0;
  }

  .section-title {
    font-size: clamp(1.35rem, 5vw, 1.75rem);
  }

  .section-desc {
    font-size: 0.88rem;
  }

  /* Show Mobile Horizontal Scroll Hint for Tables */
  .mobile-table-hint {
    display: flex;
  }

  .table-responsive {
    -webkit-overflow-scrolling: touch;
    overflow-x: auto;
    border-radius: var(--radius-md);
  }

  .bank-rate-table {
    min-width: 560px;
  }

  .bank-rate-table th,
  .bank-rate-table td {
    padding: 0.65rem 0.75rem;
    font-size: 0.85rem;
    white-space: nowrap;
  }

  /* Customer FAQ */
  .faq-header {
    font-size: 0.92rem;
    padding: 0.9rem;
    text-align: left;
    gap: 0.65rem;
  }

  .faq-content {
    font-size: 0.86rem;
    padding: 0 0.9rem 0.9rem;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  /* Bank Cash Collection Modal Dialog (100% Mobile Ready) */
  .modal-dialog {
    width: calc(100% - 1.25rem);
    max-width: 420px;
    margin: 0.75rem auto;
    border-radius: 10px;
    max-height: calc(100vh - 1.5rem);
  }

  .modal-dialog-body {
    padding: 1.15rem 0.9rem;
    max-height: calc(100vh - 90px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* 6-Digit Counter Code Boxes (Optimized for small screens) */
  .digit-code-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 3.5px;
    margin: 0.4rem 0;
  }

  .bank-digit-cell {
    width: 36px;
    height: 50px;
    font-size: 1.45rem;
    border-radius: 4px;
  }

  .bank-digit-dash {
    font-size: 1.2rem;
  }

  .counter-staff-callout {
    padding: 0.85rem;
    font-size: 0.82rem;
  }

  .voucher-receipt-table {
    padding: 0.75rem;
    font-size: 0.82rem;
  }

  #redemptionVoucherBox > div:last-child {
    grid-template-columns: 1fr !important;
    gap: 0.5rem;
  }
}

/* Small Smartphone Breakpoint (<= 380px) */
@media (max-width: 380px) {
  .bank-digit-cell {
    width: 33px;
    height: 46px;
    font-size: 1.3rem;
  }

  .bank-digit-dash {
    font-size: 1rem;
  }

  .preset-row {
    grid-template-columns: 1fr;
  }

  .corridor-btn {
    font-size: 0.78rem;
  }
}