/* ==========================================================================
   BU TRANSCRIPT — DESIGN SYSTEM
   Bangalore University Alumni Documentation Platform
   Bangalore University Alumni Documentation Portal

   This file is the single source of truth for design tokens, base styles,
   and reusable components. Every current and future page inherits from it.
   Load AFTER Bootstrap 5 so these tokens/utilities win the cascade.

   Sections:
     1. Design Tokens (CSS custom properties)
     2. Base / Reset
     3. Typography
     4. Layout helpers
     5. Buttons
     6. Cards (service, country, profession, agency, article, review)
     7. Badges, pills, chips
     8. Header / Navbar / Mega menu
     9. Hero
    10. Sections & eyebrows
    11. Trust bar
    12. Process timeline / steps
    13. FAQ / accordion
    14. Footer
    15. Utilities
    16. Motion & accessibility
   ========================================================================== */

/* ==========================================================================
   1. DESIGN TOKENS
   ========================================================================== */
:root {
  /* ---- Brand palette: government-inspired, premium, minimal ---- */
  --bu-navy-900: #0a1f3c;   /* darkest — footers, headings */
  --bu-navy-800: #0e2a52;   /* primary brand navy */
  --bu-navy-700: #13315c;   /* nav, buttons */
  --bu-navy-600: #1b4079;   /* hover, links */
  --bu-navy-100: #e7edf5;   /* tint backgrounds */
  --bu-navy-050: #f3f6fb;   /* section wash */

  --bu-gold-700: #9a7a2e;   /* accent dark */
  --bu-gold-600: #b8912f;   /* premium accent */
  --bu-gold-500: #c8a24a;   /* accent / highlights */
  --bu-gold-100: #f6efdc;   /* accent tint */

  --bu-teal-600: #0f6e6e;   /* secondary — verification/trust */
  --bu-teal-100: #e0f2f2;

  --bu-ink-900: #101828;    /* body text strongest */
  --bu-ink-700: #344054;    /* body text */
  --bu-ink-500: #667085;    /* muted text */
  --bu-ink-300: #98a2b3;    /* placeholder / captions */

  --bu-line: #e4e7ec;       /* borders / dividers */
  --bu-line-strong: #d0d5dd;
  --bu-white: #ffffff;
  --bu-surface: #ffffff;
  --bu-surface-alt: #f7f9fc;

  --bu-success: #12805c;
  --bu-warning: #b5521a;
  --bu-danger:  #b42318;

  /* ---- Typography ---- */
  --bu-font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --bu-font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --bu-font-mono: "SFMono-Regular", ui-monospace, "Cascadia Code", Menlo,
    Consolas, monospace;

  --bu-fs-hero: clamp(2.1rem, 4.6vw, 3.4rem);
  --bu-fs-h1: clamp(1.9rem, 3.6vw, 2.6rem);
  --bu-fs-h2: clamp(1.5rem, 2.6vw, 2.05rem);
  --bu-fs-h3: clamp(1.2rem, 1.9vw, 1.45rem);
  --bu-fs-h4: 1.15rem;
  --bu-fs-lead: clamp(1.05rem, 1.4vw, 1.2rem);
  --bu-fs-body: 1rem;
  --bu-fs-sm: 0.9rem;
  --bu-fs-xs: 0.8rem;

  --bu-lh-tight: 1.18;
  --bu-lh-snug: 1.35;
  --bu-lh-body: 1.65;

  --bu-fw-regular: 400;
  --bu-fw-medium: 500;
  --bu-fw-semibold: 600;
  --bu-fw-bold: 700;

  /* ---- Spacing scale (8pt) ---- */
  --bu-space-1: 0.25rem;
  --bu-space-2: 0.5rem;
  --bu-space-3: 0.75rem;
  --bu-space-4: 1rem;
  --bu-space-5: 1.5rem;
  --bu-space-6: 2rem;
  --bu-space-7: 3rem;
  --bu-space-8: 4rem;
  --bu-space-9: 6rem;

  /* ---- Radius ---- */
  --bu-radius-sm: 6px;
  --bu-radius: 10px;
  --bu-radius-lg: 16px;
  --bu-radius-xl: 22px;
  --bu-radius-pill: 999px;

  /* ---- Shadows ---- */
  --bu-shadow-xs: 0 1px 2px rgba(16, 24, 40, 0.05);
  --bu-shadow-sm: 0 1px 3px rgba(16, 24, 40, 0.08), 0 1px 2px rgba(16,24,40,0.04);
  --bu-shadow-md: 0 6px 16px rgba(16, 24, 40, 0.08);
  --bu-shadow-lg: 0 18px 40px rgba(10, 31, 60, 0.14);
  --bu-shadow-gold: 0 8px 24px rgba(184, 145, 47, 0.25);

  /* ---- Layout ---- */
  --bu-container: 1200px;
  --bu-container-narrow: 820px;
  --bu-header-h: 76px;
  --bu-transition: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --bu-transition-slow: 320ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Bootstrap variable overrides */
  --bs-primary: var(--bu-navy-700);
  --bs-body-font-family: var(--bu-font-sans);
  --bs-body-color: var(--bu-ink-700);
  --bs-link-color: var(--bu-navy-600);
  --bs-link-hover-color: var(--bu-navy-800);
  --bs-border-color: var(--bu-line);
}

/* ==========================================================================
   2. BASE / RESET
   ========================================================================== */
*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--bu-font-sans);
  font-size: var(--bu-fs-body);
  line-height: var(--bu-lh-body);
  color: var(--bu-ink-700);
  background: var(--bu-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; vertical-align: middle; }

a { color: var(--bu-navy-600); text-decoration: none; transition: color var(--bu-transition); }
a:hover { color: var(--bu-navy-800); text-decoration: underline; }

hr.bu-rule { border: 0; border-top: 1px solid var(--bu-line); margin: var(--bu-space-6) 0; }

::selection { background: var(--bu-gold-100); color: var(--bu-navy-900); }

:focus-visible {
  outline: 3px solid var(--bu-gold-500);
  outline-offset: 2px;
  border-radius: var(--bu-radius-sm);
}

/* ==========================================================================
   3. TYPOGRAPHY
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--bu-font-sans);
  color: var(--bu-navy-900);
  line-height: var(--bu-lh-tight);
  font-weight: var(--bu-fw-bold);
  letter-spacing: -0.015em;
  margin: 0 0 var(--bu-space-4);
}

h1, .h1 { font-size: var(--bu-fs-h1); }
h2, .h2 { font-size: var(--bu-fs-h2); }
h3, .h3 { font-size: var(--bu-fs-h3); font-weight: var(--bu-fw-semibold); }
h4, .h4 { font-size: var(--bu-fs-h4); font-weight: var(--bu-fw-semibold); }

p { margin: 0 0 var(--bu-space-4); }

.bu-lead {
  font-size: var(--bu-fs-lead);
  line-height: var(--bu-lh-snug);
  color: var(--bu-ink-700);
}

.bu-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--bu-space-2);
  font-size: var(--bu-fs-xs);
  font-weight: var(--bu-fw-semibold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--bu-gold-700);
  margin-bottom: var(--bu-space-3);
}
.bu-eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--bu-gold-500);
  display: inline-block;
}

.bu-text-muted { color: var(--bu-ink-500) !important; }
.bu-text-navy  { color: var(--bu-navy-800) !important; }
.bu-text-gold  { color: var(--bu-gold-700) !important; }
.bu-serif      { font-family: var(--bu-font-serif); }

/* ==========================================================================
   4. LAYOUT HELPERS
   ========================================================================== */
.bu-container { max-width: var(--bu-container); margin-inline: auto; padding-inline: var(--bu-space-4); }
.bu-container-narrow { max-width: var(--bu-container-narrow); margin-inline: auto; padding-inline: var(--bu-space-4); }

.bu-section { padding-block: var(--bu-space-8); }
.bu-section-sm { padding-block: var(--bu-space-7); }
.bu-section-wash { background: var(--bu-navy-050); }
.bu-section-alt { background: var(--bu-surface-alt); }
.bu-section-dark { background: var(--bu-navy-900); color: #cdd8e8; }
.bu-section-dark h2, .bu-section-dark h3, .bu-section-dark h4 { color: #fff; }

.bu-section-head { max-width: 720px; margin-bottom: var(--bu-space-6); }
.bu-section-head.center { margin-inline: auto; text-align: center; }

/* ==========================================================================
   5. BUTTONS
   ========================================================================== */
.bu-btn {
  --_bg: var(--bu-navy-700);
  --_fg: #fff;
  --_bd: var(--bu-navy-700);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--bu-space-2);
  font-weight: var(--bu-fw-semibold);
  font-size: var(--bu-fs-body);
  line-height: 1;
  padding: 0.85rem 1.5rem;
  border-radius: var(--bu-radius);
  border: 1.5px solid var(--_bd);
  background: var(--_bg);
  color: var(--_fg);
  cursor: pointer;
  transition: transform var(--bu-transition), box-shadow var(--bu-transition),
    background var(--bu-transition), color var(--bu-transition);
  text-decoration: none;
}
.bu-btn:hover { text-decoration: none; color: var(--_fg); transform: translateY(-1px); box-shadow: var(--bu-shadow-md); }
.bu-btn:active { transform: translateY(0); }

.bu-btn--primary { --_bg: var(--bu-navy-700); --_bd: var(--bu-navy-700); --_fg:#fff; }
.bu-btn--primary:hover { --_bg: var(--bu-navy-800); }

.bu-btn--gold { --_bg: var(--bu-gold-600); --_bd: var(--bu-gold-600); --_fg: #201700; }
.bu-btn--gold:hover { --_bg: var(--bu-gold-500); box-shadow: var(--bu-shadow-gold); color:#201700; }

.bu-btn--outline { --_bg: transparent; --_bd: var(--bu-navy-700); --_fg: var(--bu-navy-800); }
.bu-btn--outline:hover { --_bg: var(--bu-navy-700); --_fg: #fff; }

.bu-btn--ghost { --_bg: transparent; --_bd: transparent; --_fg: var(--bu-navy-800); }
.bu-btn--ghost:hover { --_bg: var(--bu-navy-100); box-shadow: none; }

.bu-btn--on-dark { --_bg: #fff; --_bd:#fff; --_fg: var(--bu-navy-900); }
.bu-btn--on-dark-outline { --_bg: transparent; --_bd: rgba(255,255,255,.5); --_fg:#fff; }
.bu-btn--on-dark-outline:hover { --_bg: rgba(255,255,255,.12); }

.bu-btn--lg { padding: 1rem 1.9rem; font-size: 1.05rem; }
.bu-btn--sm { padding: 0.55rem 1rem; font-size: var(--bu-fs-sm); }
.bu-btn--block { width: 100%; }

/* ==========================================================================
   6. CARDS
   ========================================================================== */
.bu-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--bu-surface);
  border: 1px solid var(--bu-line);
  border-radius: var(--bu-radius-lg);
  padding: var(--bu-space-5);
  box-shadow: var(--bu-shadow-xs);
  transition: transform var(--bu-transition), box-shadow var(--bu-transition),
    border-color var(--bu-transition);
  height: 100%;
}
.bu-card:hover { transform: translateY(-3px); box-shadow: var(--bu-shadow-lg); border-color: var(--bu-navy-100); }

.bu-card__icon {
  width: 48px; height: 48px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--bu-radius);
  background: var(--bu-navy-050);
  color: var(--bu-navy-700);
  margin-bottom: var(--bu-space-4);
  font-size: 1.4rem;
}
.bu-card__title { font-size: var(--bu-fs-h4); color: var(--bu-navy-900); margin-bottom: var(--bu-space-2); }
.bu-card__text  { color: var(--bu-ink-500); font-size: var(--bu-fs-sm); margin-bottom: var(--bu-space-4); }
.bu-card__link  { margin-top: auto; font-weight: var(--bu-fw-semibold); font-size: var(--bu-fs-sm); color: var(--bu-navy-700); }
.bu-card__link::after { content: " →"; transition: margin var(--bu-transition); }
.bu-card:hover .bu-card__link::after { margin-left: 4px; }

/* Whole-card clickable */
.bu-card--link a.bu-stretched::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
}

/* Service card variant with top accent */
.bu-card--service { border-top: 3px solid var(--bu-gold-500); }

/* Country / flag card */
.bu-card--country { align-items: flex-start; }
.bu-card--country .bu-flag {
  font-size: 1.9rem; line-height: 1; margin-bottom: var(--bu-space-3);
}

/* Agency / profession compact tile */
.bu-tile {
  display: flex; align-items: center; gap: var(--bu-space-3);
  padding: var(--bu-space-4);
  border: 1px solid var(--bu-line);
  border-radius: var(--bu-radius);
  background: #fff;
  color: var(--bu-navy-900);
  font-weight: var(--bu-fw-semibold);
  font-size: var(--bu-fs-sm);
  transition: all var(--bu-transition);
  height: 100%;
}
.bu-tile:hover { border-color: var(--bu-navy-600); box-shadow: var(--bu-shadow-sm); text-decoration: none; transform: translateY(-2px); }
.bu-tile__mark {
  width: 34px; height: 34px; flex: 0 0 34px;
  display: inline-flex; align-items:center; justify-content:center;
  background: var(--bu-navy-050); color: var(--bu-navy-700);
  border-radius: 8px; font-weight: var(--bu-fw-bold); font-size: var(--bu-fs-xs);
}

/* Article / blog card */
.bu-article-card { overflow: hidden; padding: 0; }
.bu-article-card .bu-article-card__media {
  aspect-ratio: 16 / 9; background: var(--bu-navy-100);
  display: block; overflow: hidden;
}
.bu-article-card__media img { width: 100%; height: 100%; object-fit: cover; }
.bu-article-card__body { padding: var(--bu-space-5); display:flex; flex-direction:column; height:100%; }
.bu-article-card__meta { font-size: var(--bu-fs-xs); color: var(--bu-ink-500); margin-bottom: var(--bu-space-2); text-transform: uppercase; letter-spacing: .06em; }

/* Review card (structure only — populate with REAL reviews) */
.bu-review-card { background:#fff; }
.bu-review-card__stars { color: var(--bu-gold-600); letter-spacing: 2px; margin-bottom: var(--bu-space-2); }
.bu-review-card__quote { font-size: var(--bu-fs-body); color: var(--bu-ink-900); }
.bu-review-card__author { font-weight: var(--bu-fw-semibold); color: var(--bu-navy-900); font-size: var(--bu-fs-sm); margin-top: var(--bu-space-3); }

/* ==========================================================================
   7. BADGES / PILLS / CHIPS
   ========================================================================== */
.bu-badge {
  display: inline-flex; align-items:center; gap: 6px;
  padding: 0.3rem 0.7rem;
  font-size: var(--bu-fs-xs); font-weight: var(--bu-fw-semibold);
  border-radius: var(--bu-radius-pill);
  background: var(--bu-navy-050); color: var(--bu-navy-700);
  line-height: 1;
}
.bu-badge--gold { background: var(--bu-gold-100); color: var(--bu-gold-700); }
.bu-badge--teal { background: var(--bu-teal-100); color: var(--bu-teal-600); }
.bu-badge--success { background: #e3f5ee; color: var(--bu-success); }
.bu-badge--outline { background: transparent; border: 1px solid var(--bu-line-strong); color: var(--bu-ink-700); }

.bu-chip {
  display:inline-flex; align-items:center; gap:6px;
  padding: 0.45rem 0.9rem; border:1px solid var(--bu-line-strong);
  border-radius: var(--bu-radius-pill); font-size: var(--bu-fs-sm);
  color: var(--bu-navy-800); background:#fff; transition: all var(--bu-transition);
}
.bu-chip:hover, .bu-chip.is-active { border-color: var(--bu-navy-700); background: var(--bu-navy-050); text-decoration:none; }

/* ==========================================================================
   8. HEADER / NAVBAR / MEGA MENU
   ========================================================================== */
.bu-announce {
  background: var(--bu-gold-600);
  color: #201700;
  font-weight: var(--bu-fw-semibold);
  font-size: var(--bu-fs-sm);
  text-align: center;
  padding-block: 8px;
}
.bu-announce a { color: #201700; text-decoration: underline; }

.bu-topbar {
  background: var(--bu-navy-900);
  color: #c3cfe0;
  font-size: var(--bu-fs-xs);
}
.bu-topbar a { color: #dbe4f0; }
.bu-topbar .bu-container { display:flex; align-items:center; justify-content:space-between; gap: var(--bu-space-4); padding-block: 8px; flex-wrap: wrap; }
.bu-topbar__trust { display:flex; gap: var(--bu-space-4); flex-wrap: wrap; align-items:center; }
.bu-topbar__trust span { display:inline-flex; align-items:center; gap:6px; }

.bu-header {
  position: sticky; top: 0; z-index: 1030;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--bu-line);
}
.bu-header.is-scrolled { box-shadow: var(--bu-shadow-sm); }
.bu-header__inner { display:flex; align-items:center; justify-content:space-between; gap: var(--bu-space-4); height: var(--bu-header-h); }

/* Brand / logo */
.bu-brand { display:flex; align-items:center; gap: var(--bu-space-3); text-decoration:none; }
.bu-brand:hover { text-decoration:none; }
.bu-brand__mark {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--bu-navy-800), var(--bu-navy-600));
  color:#fff; display:inline-flex; align-items:center; justify-content:center;
  font-weight: var(--bu-fw-bold); font-size: 1.05rem; letter-spacing:-.02em;
  box-shadow: var(--bu-shadow-sm);
}
.bu-brand__text { line-height: 1.1; }
.bu-brand__name { font-weight: var(--bu-fw-bold); color: var(--bu-navy-900); font-size: 1.15rem; letter-spacing:-.02em; }
.bu-brand__sub  { font-size: 0.68rem; color: var(--bu-ink-500); letter-spacing: .02em; }

/* Primary nav */
.bu-nav { display:flex; align-items:center; gap: var(--bu-space-1); }
.bu-nav__item { position: relative; }
.bu-nav__link {
  display:inline-flex; align-items:center; gap:6px;
  padding: 0.6rem 0.85rem; border-radius: var(--bu-radius-sm);
  color: var(--bu-navy-900); font-weight: var(--bu-fw-medium); font-size: 0.95rem;
  cursor: pointer; background: transparent; border: 0;
}
.bu-nav__link:hover, .bu-nav__item.is-open .bu-nav__link { background: var(--bu-navy-050); color: var(--bu-navy-800); text-decoration:none; }
.bu-nav__link[aria-expanded] .bu-caret { transition: transform var(--bu-transition); }
.bu-nav__item.is-open .bu-caret { transform: rotate(180deg); }

/* Mega menu panel */
.bu-mega {
  position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(6px);
  width: min(960px, 92vw);
  background:#fff; border:1px solid var(--bu-line);
  border-radius: var(--bu-radius-lg); box-shadow: var(--bu-shadow-lg);
  padding: var(--bu-space-6);
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: opacity var(--bu-transition), transform var(--bu-transition), visibility var(--bu-transition);
  z-index: 1040;
}
.bu-nav__item.is-open .bu-mega { opacity:1; visibility:visible; pointer-events:auto; transform: translateX(-50%) translateY(0); }
.bu-mega__grid { display:grid; grid-template-columns: repeat(4, 1fr); gap: var(--bu-space-5); }
.bu-mega__col h5 {
  font-size: var(--bu-fs-xs); text-transform: uppercase; letter-spacing:.1em;
  color: var(--bu-gold-700); margin-bottom: var(--bu-space-3); font-weight: var(--bu-fw-bold);
}
.bu-mega__link { display:block; padding: 0.35rem 0; color: var(--bu-ink-700); font-size: var(--bu-fs-sm); }
.bu-mega__link:hover { color: var(--bu-navy-800); text-decoration:none; padding-left: 4px; }
.bu-mega__feature {
  grid-column: span 1; background: var(--bu-navy-900); color:#cdd8e8;
  border-radius: var(--bu-radius); padding: var(--bu-space-5);
  display:flex; flex-direction:column; justify-content:space-between;
}
.bu-mega__feature h4 { color:#fff; font-size: 1.05rem; }
.bu-mega__viewall { display:inline-block; margin-top: var(--bu-space-3); color: var(--bu-gold-500); font-weight: var(--bu-fw-semibold); font-size: var(--bu-fs-sm); }

/* Mobile drawer */
.bu-burger { display:none; background:none; border:0; padding:8px; cursor:pointer; color: var(--bu-navy-900); }
.bu-drawer { display:none; }

/* ==========================================================================
   9. HERO
   ========================================================================== */
.bu-hero {
  position: relative;
  background:
    radial-gradient(1100px 480px at 82% -8%, rgba(184,145,47,0.14), transparent 60%),
    linear-gradient(180deg, var(--bu-navy-900), var(--bu-navy-800));
  color: #dfe7f2; overflow: hidden;
}
.bu-hero::after {
  content:""; position:absolute; inset:0; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 44px 44px; mask-image: radial-gradient(70% 60% at 20% 20%, #000, transparent);
  opacity:.5;
}
.bu-hero__inner { position: relative; z-index:1; padding-block: var(--bu-space-9) var(--bu-space-8); }
.bu-hero h1 { color:#fff; font-size: var(--bu-fs-hero); max-width: 16ch; }
.bu-hero .bu-lead { color:#c6d2e4; max-width: 52ch; }
.bu-hero__cta { display:flex; gap: var(--bu-space-3); flex-wrap:wrap; margin-top: var(--bu-space-5); }
.bu-hero__eyebrow { color: var(--bu-gold-500); }
.bu-hero__eyebrow::before { background: var(--bu-gold-500); }
.bu-hero__stats { display:flex; gap: var(--bu-space-6); flex-wrap:wrap; margin-top: var(--bu-space-7); }
.bu-hero__stat b { display:block; font-size: 1.6rem; color:#fff; font-weight: var(--bu-fw-bold); }
.bu-hero__stat span { font-size: var(--bu-fs-xs); color:#9fb0c9; text-transform:uppercase; letter-spacing:.08em; }

/* Hero side panel (e.g. quick-start wizard shell) */
.bu-hero__panel {
  background:#fff; color: var(--bu-ink-700);
  border-radius: var(--bu-radius-lg); box-shadow: var(--bu-shadow-lg);
  padding: var(--bu-space-6);
}

/* ==========================================================================
   10. SECTION ELEMENTS
   ========================================================================== */
.bu-kv { /* key-value fact row */
  display:flex; justify-content:space-between; gap: var(--bu-space-4);
  padding: 0.7rem 0; border-bottom: 1px solid var(--bu-line);
}
.bu-kv:last-child { border-bottom: 0; }
.bu-kv dt { color: var(--bu-ink-500); font-size: var(--bu-fs-sm); }
.bu-kv dd { margin:0; font-weight: var(--bu-fw-semibold); color: var(--bu-navy-900); font-size: var(--bu-fs-sm); text-align:right; }

/* Answer / fact box for GEO extraction */
.bu-answer-box {
  border-left: 4px solid var(--bu-gold-500);
  background: var(--bu-gold-100);
  padding: var(--bu-space-5);
  border-radius: 0 var(--bu-radius) var(--bu-radius) 0;
  color: var(--bu-navy-900);
}
.bu-answer-box p:last-child { margin-bottom:0; }

/* ==========================================================================
   11. TRUST BAR
   ========================================================================== */
.bu-trustbar { border-block: 1px solid var(--bu-line); background:#fff; }
.bu-trustbar__row { display:flex; align-items:center; justify-content:space-between; gap: var(--bu-space-5); flex-wrap:wrap; padding-block: var(--bu-space-4); }
.bu-trust-item { display:flex; align-items:center; gap: var(--bu-space-2); color: var(--bu-ink-700); font-size: var(--bu-fs-sm); font-weight: var(--bu-fw-medium); }
.bu-trust-item .bu-trust-ico { color: var(--bu-teal-600); }

/* ==========================================================================
   12. PROCESS TIMELINE / STEPS
   ========================================================================== */
.bu-steps { display:grid; gap: var(--bu-space-5); counter-reset: step; }
.bu-steps--h { grid-template-columns: repeat(4, 1fr); }
.bu-step { position: relative; padding-top: var(--bu-space-5); }
.bu-step__num {
  counter-increment: step;
  width: 40px; height:40px; border-radius:50%;
  background: var(--bu-navy-700); color:#fff;
  display:inline-flex; align-items:center; justify-content:center;
  font-weight: var(--bu-fw-bold); margin-bottom: var(--bu-space-3);
}
.bu-step__num::before { content: counter(step); }
.bu-step h4 { font-size: var(--bu-fs-h4); }
.bu-step p { font-size: var(--bu-fs-sm); color: var(--bu-ink-500); }

/* Vertical timeline */
.bu-timeline { position: relative; padding-left: var(--bu-space-6); }
.bu-timeline::before { content:""; position:absolute; left: 14px; top: 6px; bottom: 6px; width:2px; background: var(--bu-line-strong); }
.bu-timeline__item { position: relative; padding-bottom: var(--bu-space-5); }
.bu-timeline__dot { position:absolute; left: calc(-1 * var(--bu-space-6) + 6px); top: 3px; width: 16px; height:16px; border-radius:50%; background:#fff; border:3px solid var(--bu-gold-500); }

/* ==========================================================================
   13. FAQ / ACCORDION
   ========================================================================== */
.bu-faq { max-width: 820px; }
.bu-faq__item { border-bottom: 1px solid var(--bu-line); }
.bu-faq__q {
  width:100%; text-align:left; background:none; border:0;
  padding: var(--bu-space-5) var(--bu-space-6) var(--bu-space-5) 0;
  font-size: var(--bu-fs-h4); font-weight: var(--bu-fw-semibold); color: var(--bu-navy-900);
  cursor:pointer; position:relative; display:flex; justify-content:space-between; gap: var(--bu-space-4); align-items:center;
}
.bu-faq__q .bu-faq__icon { flex:0 0 auto; transition: transform var(--bu-transition); color: var(--bu-navy-600); }
.bu-faq__item.is-open .bu-faq__icon { transform: rotate(45deg); }
.bu-faq__a { max-height:0; overflow:hidden; transition: max-height var(--bu-transition-slow); }
.bu-faq__a-inner { padding-bottom: var(--bu-space-5); color: var(--bu-ink-700); }

/* ==========================================================================
   14. FOOTER
   ========================================================================== */
.bu-footer { background: var(--bu-navy-900); color:#a9b8cf; padding-top: var(--bu-space-8); }
.bu-footer a { color:#c7d2e2; font-size: var(--bu-fs-sm); }
.bu-footer a:hover { color:#fff; text-decoration:none; }
.bu-footer__grid { display:grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: var(--bu-space-6); }
.bu-footer__col h6 { color:#fff; font-size: var(--bu-fs-xs); text-transform:uppercase; letter-spacing:.1em; margin-bottom: var(--bu-space-4); }
.bu-footer__col ul { list-style:none; margin:0; padding:0; display:grid; gap: var(--bu-space-2); }
.bu-footer__brand .bu-brand__name { color:#fff; }
.bu-footer__brand .bu-brand__sub { color:#8598b4; }
.bu-footer__bottom {
  margin-top: var(--bu-space-7); border-top:1px solid rgba(255,255,255,.1);
  padding-block: var(--bu-space-5); display:flex; justify-content:space-between; gap: var(--bu-space-4); flex-wrap:wrap;
  font-size: var(--bu-fs-xs); color:#7f92ad;
}
.bu-footer__powered { display:inline-flex; align-items:center; gap:6px; }
.bu-footer__powered b { color:#cdd8e8; }

/* ==========================================================================
   15. UTILITIES
   ========================================================================== */
.bu-grid { display:grid; gap: var(--bu-space-5); }
.bu-grid--2 { grid-template-columns: repeat(2, 1fr); }
.bu-grid--3 { grid-template-columns: repeat(3, 1fr); }
.bu-grid--4 { grid-template-columns: repeat(4, 1fr); }
.bu-grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.bu-stack > * + * { margin-top: var(--bu-space-4); }
.bu-mt-0 { margin-top:0 !important; }
.bu-mb-0 { margin-bottom:0 !important; }
.bu-center { text-align:center; }
.bu-flex { display:flex; }
.bu-items-center { align-items:center; }
.bu-gap-2 { gap: var(--bu-space-2); }
.bu-gap-3 { gap: var(--bu-space-3); }
.bu-wrap { flex-wrap: wrap; }
.bu-divider { height:1px; background: var(--bu-line); margin-block: var(--bu-space-6); border:0; }
.bu-skip-link {
  position:absolute; left:-999px; top:0; background:#fff; color: var(--bu-navy-900);
  padding: var(--bu-space-3) var(--bu-space-4); z-index:2000; border-radius: 0 0 var(--bu-radius) 0;
}
.bu-skip-link:focus { left:0; }

/* Back to top */
.bu-totop {
  position: fixed; right: 20px; bottom: 20px; z-index: 1020;
  width:44px; height:44px; border-radius:50%; border:1px solid var(--bu-line);
  background:#fff; color: var(--bu-navy-800); box-shadow: var(--bu-shadow-md);
  display:none; align-items:center; justify-content:center; cursor:pointer;
}
.bu-totop.is-visible { display:inline-flex; }

/* Floating WhatsApp / contact (structure only) */
.bu-fab {
  position: fixed; right: 20px; bottom: 76px; z-index: 1020;
  display:inline-flex; align-items:center; gap:8px;
  padding: 0.7rem 1.1rem; border-radius: var(--bu-radius-pill);
  background: var(--bu-teal-600); color:#fff; font-weight: var(--bu-fw-semibold); font-size: var(--bu-fs-sm);
  box-shadow: var(--bu-shadow-lg);
}
.bu-fab:hover { color:#fff; text-decoration:none; transform: translateY(-2px); }

/* ==========================================================================
   16. MOTION & ACCESSIBILITY
   ========================================================================== */
/* Progressive enhancement: content is fully visible by default (no-JS, crawlers).
   The hidden start-state only applies when JS has added `.js` to <html>. */
.bu-reveal { transition: opacity 500ms ease, transform 500ms ease; }
.js .bu-reveal { opacity:0; transform: translateY(14px); }
.js .bu-reveal.is-in { opacity:1; transform:none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  .bu-reveal { opacity:1; transform:none; }
}

.bu-visually-hidden {
  position:absolute !important; width:1px; height:1px; padding:0; margin:-1px;
  overflow:hidden; clip: rect(0,0,0,0); white-space:nowrap; border:0;
}

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 991.98px) {
  .bu-mega__grid { grid-template-columns: repeat(2, 1fr); }
  .bu-footer__grid { grid-template-columns: 1fr 1fr; }
  .bu-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .bu-steps--h { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767.98px) {
  :root { --bu-header-h: 64px; }
  .bu-nav, .bu-topbar__trust .bu-hide-sm { display:none; }
  .bu-burger { display:inline-flex; }
  .bu-grid--2, .bu-grid--3, .bu-grid--4, .bu-steps--h { grid-template-columns: 1fr; }
  .bu-footer__grid { grid-template-columns: 1fr; }
  .bu-hero__stats { gap: var(--bu-space-5); }
  .bu-section { padding-block: var(--bu-space-7); }

  /* Mobile drawer */
  .bu-drawer {
    display:block; position: fixed; inset:0; z-index: 1050;
    background: rgba(10,31,60,.5); opacity:0; visibility:hidden; transition: opacity var(--bu-transition);
  }
  .bu-drawer.is-open { opacity:1; visibility:visible; }
  .bu-drawer__panel {
    position:absolute; top:0; right:0; height:100%; width: min(360px, 88vw);
    background:#fff; padding: var(--bu-space-5); overflow-y:auto;
    transform: translateX(100%); transition: transform var(--bu-transition-slow);
    box-shadow: var(--bu-shadow-lg);
  }
  .bu-drawer.is-open .bu-drawer__panel { transform:none; }
  .bu-drawer__group { border-bottom:1px solid var(--bu-line); }
  .bu-drawer__toggle {
    width:100%; display:flex; justify-content:space-between; align-items:center;
    background:none; border:0; padding: var(--bu-space-4) 0; font-size: 1.05rem; font-weight: var(--bu-fw-semibold);
    color: var(--bu-navy-900); cursor:pointer;
  }
  .bu-drawer__sub { display:none; padding-bottom: var(--bu-space-4); }
  .bu-drawer__group.is-open .bu-drawer__sub { display:grid; gap: var(--bu-space-2); }
  .bu-drawer__sub a { color: var(--bu-ink-700); padding: 4px 0; }
}