/* ============================================================
   Boyne Tech — Master Stylesheet
   ============================================================ */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@700;800&family=DM+Sans:wght@400;500&display=swap');

/* ── 1. CSS Variables ───────────────────────────────────────── */
:root {
  /* Brand colours */
  --bt-navy:    #0E2438;
  --bt-blue:    #1C537E;
  --bt-emerald: #177A4E;
  --bt-slate:   #4E646A;
  --bt-grey:    #8C9994;
  --bt-cloud:   #EEF3EE;
  --bt-white:   #FFFFFF;

  /* Typography */
  --bt-font-display: 'Syne', sans-serif;
  --bt-font-body:    'DM Sans', sans-serif;

  /* Spacing scale */
  --bt-space-xs:  0.5rem;
  --bt-space-sm:  1rem;
  --bt-space-md:  1.5rem;
  --bt-space-lg:  2.5rem;
  --bt-space-xl:  4rem;
  --bt-space-2xl: 6rem;

  /* Layout */
  --bt-max-width:   1200px;
  --bt-radius-sm:   4px;
  --bt-radius-md:   8px;
  --bt-radius-lg:   16px;
  --bt-shadow-sm:   0 1px 4px rgba(14,36,56,.08);
  --bt-shadow-md:   0 4px 16px rgba(14,36,56,.12);
  --bt-shadow-lg:   0 8px 32px rgba(14,36,56,.16);

  /* Transitions */
  --bt-transition: 0.2s ease;
}

/* ── 2. Reset & Base ────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--bt-font-body);
  font-weight: 400;
  color: var(--bt-navy);
  background-color: var(--bt-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--bt-blue);
  text-decoration: none;
  transition: color var(--bt-transition);
}

a:hover {
  color: var(--bt-emerald);
}

ul, ol {
  list-style: none;
}

/* ── 3. Typography ──────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--bt-font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--bt-navy);
}

h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.text-emerald { color: var(--bt-emerald); }
.text-blue    { color: var(--bt-blue); }
.text-slate   { color: var(--bt-slate); }
.text-grey    { color: var(--bt-grey); }
.text-white   { color: var(--bt-white); }
.text-navy    { color: var(--bt-navy); }

.text-sm  { font-size: 0.875rem; }
.text-lg  { font-size: 1.125rem; }
.text-xl  { font-size: 1.25rem; }

.font-500 { font-weight: 500; }

/* ── 4. Layout Utilities ────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: var(--bt-space-2xl);
}

.section--cloud {
  background-color: var(--bt-cloud);
}

.section--navy {
  background-color: var(--bt-navy);
  color: var(--bt-white);
}

.section--navy h2,
.section--navy h3,
.section--navy p {
  color: var(--bt-white);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.flex        { display: flex; }
.flex-center { align-items: center; justify-content: center; }
.flex-between{ align-items: center; justify-content: space-between; }
.flex-wrap   { flex-wrap: wrap; }
.gap-sm      { gap: var(--bt-space-sm); }
.gap-md      { gap: var(--bt-space-md); }
.gap-lg      { gap: var(--bt-space-lg); }

.text-center { text-align: center; }

.mt-sm { margin-top: var(--bt-space-sm); }
.mt-md { margin-top: var(--bt-space-md); }
.mt-lg { margin-top: var(--bt-space-lg); }
.mt-xl { margin-top: var(--bt-space-xl); }
.mb-sm { margin-bottom: var(--bt-space-sm); }
.mb-md { margin-bottom: var(--bt-space-md); }
.mb-lg { margin-bottom: var(--bt-space-lg); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

/* ── 5. Navigation ──────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bt-white);
  border-bottom: 1px solid rgba(140,153,148,.2);
  box-shadow: var(--bt-shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.nav-logo {
  font-family: var(--bt-font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--bt-navy);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

/* Logo mark — rendered via CSS so it works on every page without HTML edits */
.nav-logo::before {
  content: '';
  display: block;
  width: 30px;
  height: 30px;
  background-image: url('../favicon.svg');
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  flex-shrink: 0;
  border-radius: 6px;
}

.nav-logo span {
  color: var(--bt-emerald);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--bt-navy);
  padding: 0.5rem 0.75rem;
  border-radius: var(--bt-radius-sm);
  transition: color var(--bt-transition), background-color var(--bt-transition);
}

.nav-links a:hover {
  color: var(--bt-blue);
  background-color: var(--bt-cloud);
}

.nav-links a.active {
  color: var(--bt-emerald);
  font-weight: 700;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--bt-navy);
  border-radius: 2px;
  transition: transform var(--bt-transition), opacity var(--bt-transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile menu */
.nav-mobile {
  display: none;
  flex-direction: column;
  background-color: var(--bt-white);
  border-top: 1px solid var(--bt-cloud);
  padding: 1rem 1.5rem 1.5rem;
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  font-weight: 500;
  color: var(--bt-navy);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--bt-cloud);
  font-size: 1rem;
}

.nav-mobile a:last-child {
  border-bottom: none;
  margin-top: 0.5rem;
}

.nav-mobile a:hover {
  color: var(--bt-blue);
}

/* ── 6. Buttons ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--bt-font-body);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1;
  padding: 0.875rem 1.75rem;
  border-radius: var(--bt-radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--bt-transition), color var(--bt-transition), border-color var(--bt-transition), box-shadow var(--bt-transition);
  white-space: nowrap;
}

.btn-sm {
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
}

.btn-lg {
  font-size: 1.125rem;
  padding: 1.125rem 2.25rem;
}

.btn-primary {
  background-color: var(--bt-blue);
  color: var(--bt-white);
  border-color: var(--bt-blue);
}

.btn-primary:hover {
  background-color: var(--bt-navy);
  border-color: var(--bt-navy);
  color: var(--bt-white);
  box-shadow: var(--bt-shadow-md);
}

.btn-secondary {
  background-color: transparent;
  color: var(--bt-blue);
  border-color: var(--bt-blue);
}

.btn-secondary:hover {
  background-color: var(--bt-blue);
  color: var(--bt-white);
}

.btn-emerald {
  background-color: var(--bt-emerald);
  color: var(--bt-white);
  border-color: var(--bt-emerald);
}

.btn-emerald:hover {
  background-color: #0a6347;
  border-color: #0a6347;
  color: var(--bt-white);
  box-shadow: var(--bt-shadow-md);
}

.btn-outline-white {
  background-color: transparent;
  color: var(--bt-white);
  border-color: var(--bt-white);
}

.btn-outline-white:hover {
  background-color: var(--bt-white);
  color: var(--bt-navy);
}

/* ── 7. Cards ───────────────────────────────────────────────── */
.card {
  background-color: var(--bt-white);
  border-radius: var(--bt-radius-lg);
  box-shadow: var(--bt-shadow-sm);
  padding: 2rem;
  transition: box-shadow var(--bt-transition), transform var(--bt-transition);
}

.card:hover {
  box-shadow: var(--bt-shadow-md);
  transform: translateY(-2px);
}

.card--border {
  border: 1px solid rgba(140,153,148,.25);
  box-shadow: none;
}

.card--border:hover {
  border-color: var(--bt-blue);
  box-shadow: var(--bt-shadow-sm);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--bt-radius-md);
  background-color: var(--bt-cloud);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--bt-emerald);
  font-size: 1.5rem;
}

.card-title {
  font-family: var(--bt-font-display);
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.625rem;
  color: var(--bt-navy);
}

.card-body {
  color: var(--bt-slate);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

.card-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--bt-blue);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.card-link::after {
  content: '→';
  transition: transform var(--bt-transition);
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* Article / Insight cards */
.article-card {
  background-color: var(--bt-white);
  border-radius: var(--bt-radius-lg);
  overflow: hidden;
  box-shadow: var(--bt-shadow-sm);
  border: 1px solid rgba(140,153,148,.15);
  transition: box-shadow var(--bt-transition), transform var(--bt-transition);
}

.article-card:hover {
  box-shadow: var(--bt-shadow-md);
  transform: translateY(-3px);
}

.article-card__image {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background-color: var(--bt-cloud);
}

.article-card__body {
  padding: 1.5rem;
}

.article-card__tag {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--bt-emerald);
  margin-bottom: 0.625rem;
}

.article-card__title {
  font-family: var(--bt-font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--bt-navy);
  margin-bottom: 0.75rem;
  line-height: 1.35;
}

.article-card__excerpt {
  font-size: 0.875rem;
  color: var(--bt-slate);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.article-card__meta {
  font-size: 0.8125rem;
  color: var(--bt-grey);
}

/* ── 8. Hero ────────────────────────────────────────────────── */
.hero {
  background-color: var(--bt-navy);
  color: var(--bt-white);
  padding-block: var(--bt-space-2xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 70% 50%, rgba(28,83,126,.4) 0%, transparent 70%),
              radial-gradient(ellipse 40% 40% at 20% 80%, rgba(23,122,78,.25) 0%, transparent 60%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.hero__label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bt-emerald);
  margin-bottom: 1rem;
}

.hero__title {
  color: var(--bt-white);
  margin-bottom: 1.25rem;
  max-width: 14ch;
}

.hero__title .accent {
  color: var(--bt-emerald);
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,.8);
  max-width: 52ch;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Section headers */
.section-label {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bt-emerald);
  margin-bottom: 0.625rem;
  display: block;
}

.section-header {
  max-width: 680px;
}

.section-header--center {
  max-width: 680px;
  margin-inline: auto;
  text-align: center;
}

.section-header p {
  color: var(--bt-slate);
  font-size: 1.0625rem;
  margin-top: 0.75rem;
}

/* ── 9. Stats Row ───────────────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background-color: rgba(140,153,148,.2);
  border-radius: var(--bt-radius-lg);
  overflow: hidden;
}

.stat-item {
  background-color: var(--bt-white);
  padding: 2.5rem 2rem;
  text-align: center;
}

.stat-item__number {
  font-family: var(--bt-font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--bt-navy);
  letter-spacing: -0.02em;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat-item__number .accent {
  color: var(--bt-emerald);
}

.stat-item__label {
  font-size: 0.9375rem;
  color: var(--bt-slate);
  font-weight: 500;
}

/* ── 10. Trust / Why columns ────────────────────────────────── */
.trust-col {
  text-align: center;
  padding: 2rem 1.5rem;
}

.trust-col__icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: rgba(23,122,78,.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.25rem;
  color: var(--bt-emerald);
  font-size: 1.75rem;
}

.trust-col h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.trust-col p {
  color: var(--bt-slate);
  font-size: 0.9375rem;
}

/* ── 11. CTA Banner ─────────────────────────────────────────── */
.cta-banner {
  background-color: var(--bt-navy);
  padding-block: var(--bt-space-xl);
}

.cta-banner__inner {
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.cta-banner h2 {
  color: var(--bt-white);
  max-width: 32ch;
}

.cta-banner p {
  color: rgba(255,255,255,.75);
  font-size: 1.0625rem;
  margin-top: 0.5rem;
  max-width: 44ch;
}

/* ── 12. Forms ──────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--bt-navy);
  margin-bottom: 0.375rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  font-family: var(--bt-font-body);
  font-size: 1rem;
  color: var(--bt-navy);
  background-color: var(--bt-white);
  border: 1.5px solid var(--bt-grey);
  border-radius: var(--bt-radius-md);
  padding: 0.75rem 1rem;
  transition: border-color var(--bt-transition), box-shadow var(--bt-transition);
  outline: none;
  -webkit-appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--bt-blue);
  box-shadow: 0 0 0 3px rgba(28,83,126,.15);
}

textarea {
  resize: vertical;
  min-height: 140px;
}

::placeholder {
  color: var(--bt-grey);
}

/* ── 13. Footer ─────────────────────────────────────────────── */
.site-footer {
  background-color: var(--bt-navy);
  color: rgba(255,255,255,.75);
  padding-top: var(--bt-space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.25fr;
  gap: 3rem;
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
  padding-bottom: var(--bt-space-xl);
}

.footer-logo {
  font-family: var(--bt-font-display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--bt-white);
  text-decoration: none;
  display: inline-block;
  margin-bottom: 1rem;
}

.footer-logo span {
  color: var(--bt-emerald);
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: rgba(255,255,255,.65);
  margin-bottom: 0;
}

.footer-col .registered {
  font-size: 0.8rem;
  color: rgba(255,255,255,.45);
  margin-top: 0.75rem;
}

.footer-col h4 {
  font-family: var(--bt-font-display);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--bt-white);
  letter-spacing: -0.01em;
  margin-bottom: 1rem;
}

.footer-col ul li {
  margin-bottom: 0.5rem;
}

.footer-col ul a {
  font-size: 0.9rem;
  color: rgba(255,255,255,.65);
  text-decoration: none;
  transition: color var(--bt-transition);
}

.footer-col ul a:hover {
  color: var(--bt-emerald);
}

.footer-contact-item {
  display: flex;
  gap: 0.625rem;
  font-size: 0.9rem;
  color: rgba(255,255,255,.65);
  margin-bottom: 0.625rem;
  align-items: flex-start;
}

.footer-contact-item a {
  color: rgba(255,255,255,.65);
}

.footer-contact-item a:hover {
  color: var(--bt-emerald);
}

.footer-bar {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-block: 1.25rem;
}

.footer-bar__inner {
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: rgba(255,255,255,.45);
}

.footer-bar__inner a {
  color: rgba(255,255,255,.45);
}

.footer-bar__inner a:hover {
  color: var(--bt-white);
}

/* ── 14. Page Hero (inner pages) ────────────────────────────── */
.page-hero {
  background-color: var(--bt-navy);
  padding-block: var(--bt-space-xl);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 80% 50%, rgba(28,83,126,.35) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--bt-max-width);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.page-hero h1 {
  color: var(--bt-white);
  margin-bottom: 0.75rem;
}

.page-hero p {
  color: rgba(255,255,255,.8);
  font-size: 1.125rem;
  max-width: 52ch;
}

/* ── 15. Divider ────────────────────────────────────────────── */
.divider {
  width: 48px;
  height: 4px;
  border-radius: 2px;
  background-color: var(--bt-emerald);
  margin-block: 1.25rem;
}

.divider--center {
  margin-inline: auto;
}

/* ── 16. Badge / Tag ────────────────────────────────────────── */
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.65rem;
  border-radius: 99px;
  line-height: 1.4;
}

.badge--emerald {
  background-color: rgba(23,122,78,.12);
  color: var(--bt-emerald);
}

.badge--blue {
  background-color: rgba(28,83,126,.12);
  color: var(--bt-blue);
}

/* ── 17. Responsive ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }

  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .hero__actions .btn-lg { width: 100%; justify-content: center; }

  .grid--2,
  .grid--3 { grid-template-columns: 1fr; }

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

  .cta-banner__inner { flex-direction: column; text-align: center; }

  .section { padding-block: 3.5rem; }

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

  .footer-bar__inner { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .grid--4 { grid-template-columns: 1fr; }
  .hero { padding-block: 4rem; }
}

/* ── 18. AI Chat Widget ─────────────────────────────────────── */
.chat-widget {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}

.chat-toggle {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background-color: var(--bt-navy);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bt-white);
  box-shadow: var(--bt-shadow-lg);
  transition: background-color var(--bt-transition), transform var(--bt-transition);
  flex-shrink: 0;
}

.chat-toggle:hover {
  background-color: var(--bt-blue);
  transform: scale(1.05);
}

.chat-panel {
  width: 360px;
  height: 520px;
  background-color: var(--bt-white);
  border-radius: var(--bt-radius-lg);
  box-shadow: var(--bt-shadow-lg);
  display: flex;
  flex-direction: column;
  margin-bottom: 0.75rem;
  overflow: hidden;
  border: 1px solid rgba(140,153,148,.2);
}

.chat-panel[hidden] { display: none; }

.chat-header {
  background-color: var(--bt-navy);
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}

.chat-header__title {
  font-family: var(--bt-font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--bt-white);
  letter-spacing: -0.01em;
}

.chat-header__sub {
  font-size: 0.8rem;
  color: rgba(255,255,255,.65);
  margin-top: 0.1rem;
}

.chat-close {
  background: none;
  border: none;
  color: rgba(255,255,255,.75);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--bt-radius-sm);
  transition: color var(--bt-transition);
}

.chat-close:hover { color: var(--bt-white); }

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  scroll-behavior: smooth;
}

.chat-message {
  max-width: 85%;
  padding: 0.625rem 0.875rem;
  border-radius: var(--bt-radius-md);
  font-size: 0.9rem;
  line-height: 1.5;
  word-break: break-word;
}

.chat-message--user {
  background-color: var(--bt-navy);
  color: var(--bt-white);
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}

.chat-message--assistant {
  background-color: var(--bt-cloud);
  color: var(--bt-navy);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}

.chat-message--typing {
  display: flex;
  gap: 5px;
  align-items: center;
  padding: 0.75rem 1rem;
}

.chat-message--typing span {
  display: block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--bt-slate);
  animation: chatDot 1.2s infinite ease-in-out;
}

.chat-message--typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-message--typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes chatDot {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30%            { transform: translateY(-5px); opacity: 1; }
}

.chat-input-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.875rem 1rem;
  border-top: 1px solid var(--bt-cloud);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  font-family: var(--bt-font-body);
  font-size: 0.9rem;
  color: var(--bt-navy);
  background-color: var(--bt-cloud);
  border: 1.5px solid transparent;
  border-radius: var(--bt-radius-md);
  padding: 0.6rem 0.875rem;
  outline: none;
  transition: border-color var(--bt-transition);
  min-width: 0;
}

.chat-input:focus {
  border-color: var(--bt-blue);
  background-color: var(--bt-white);
}

.chat-send {
  width: 38px;
  height: 38px;
  border-radius: var(--bt-radius-md);
  background-color: var(--bt-emerald);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bt-white);
  flex-shrink: 0;
  transition: background-color var(--bt-transition);
}

.chat-send:hover { background-color: #0a6347; }

@media (max-width: 400px) {
  .chat-panel { width: calc(100vw - 2rem); }
}