/* ==========================================================================
   ABC Company — custom styles layered over Bootstrap 5.3
   Static prototype. No build step, no preprocessor.
   ========================================================================== */

:root {
  --abc-navy: #0d1b2a;
  --abc-navy-700: #14293d;
  --abc-navy-600: #1d3a52;
  --abc-ink: #1c2b36;
  --abc-body: #3f5260;
  --abc-muted: #6c8090;
  --abc-accent: #0f8f80;
  --abc-accent-dark: #0b7568;
  --abc-accent-soft: #e3f2ef;
  --abc-line: #e2e6e8;
  --abc-surface: #ffffff;
  --abc-canvas: #f7f8f7;
  --abc-canvas-warm: #fbfaf7;
  --abc-radius: 12px;
  --abc-radius-lg: 18px;
  --abc-shadow-sm: 0 1px 2px rgba(13, 27, 42, 0.05);
  --abc-shadow: 0 10px 30px rgba(13, 27, 42, 0.07);
}

/* --------------------------------------------------------------- base ---- */

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: "Inter", "Helvetica Neue", Helvetica, Arial, system-ui, -apple-system,
    "Segoe UI", sans-serif;
  color: var(--abc-body);
  background-color: var(--abc-canvas-warm);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6, .abc-display {
  color: var(--abc-ink);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.22;
}

h1 { font-size: clamp(2rem, 1.4rem + 2.4vw, 3.1rem); }
h2 { font-size: clamp(1.6rem, 1.25rem + 1.4vw, 2.3rem); }
h3 { font-size: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem); }

p { line-height: 1.7; }

a {
  color: var(--abc-accent-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover { color: var(--abc-accent); }

/* Visible focus styles everywhere (accessibility requirement). */
a:focus-visible,
button:focus-visible,
.btn:focus-visible,
.nav-link:focus-visible,
.dropdown-item:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--abc-accent);
  outline-offset: 2px;
  box-shadow: none;
}

.abc-skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 1100;
  background: var(--abc-navy);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--abc-radius) var(--abc-radius);
  transition: top 0.15s ease-in-out;
}

.abc-skip-link:focus {
  top: 0;
  color: #fff;
}

/* -------------------------------------------------------- typography ---- */

.abc-eyebrow {
  display: inline-block;
  font-size: 0.775rem;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--abc-accent-dark);
  margin-bottom: 0.85rem;
}

.abc-eyebrow--onDark { color: #7fd6c8; }

.abc-lead {
  font-size: 1.075rem;
  color: var(--abc-body);
  max-width: 62ch;
}

.abc-section-intro { max-width: 68ch; }

.abc-note {
  font-size: 0.9rem;
  color: var(--abc-muted);
}

.abc-text-soft { color: var(--abc-muted); }

/* ------------------------------------------------------------ layout ---- */

.abc-section { padding: clamp(3.25rem, 2rem + 4vw, 5.5rem) 0; }

.abc-section--tight { padding: clamp(2.25rem, 1.5rem + 2vw, 3.5rem) 0; }

.abc-section--canvas { background-color: var(--abc-canvas); }

.abc-section--surface { background-color: var(--abc-surface); }

.abc-section--dark {
  background-color: var(--abc-navy);
  color: #c9d6de;
}

.abc-section--dark h1,
.abc-section--dark h2,
.abc-section--dark h3,
.abc-section--dark h4 { color: #fff; }

.abc-section--dark .abc-lead,
.abc-section--dark p { color: #b9c8d2; }

.abc-rule {
  height: 1px;
  border: 0;
  background: var(--abc-line);
  opacity: 1;
  margin: 0;
}

/* ------------------------------------------------------------ navbar ---- */

.abc-navbar {
  background-color: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--abc-line);
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

.abc-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.075rem;
  letter-spacing: -0.02em;
  color: var(--abc-ink);
  text-decoration: none;
}

.abc-brand:hover { color: var(--abc-ink); }

.abc-brand img { display: block; }

.abc-brand small {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--abc-muted);
}

.abc-navbar .nav-link {
  color: var(--abc-ink);
  font-size: 0.94rem;
  font-weight: 500;
  padding: 0.45rem 0.7rem;
  border-radius: 8px;
}

.abc-navbar .nav-link:hover,
.abc-navbar .nav-link:focus { color: var(--abc-accent-dark); }

.abc-navbar .nav-link.active {
  color: var(--abc-accent-dark);
  font-weight: 600;
}

.abc-navbar .dropdown-menu {
  border: 1px solid var(--abc-line);
  border-radius: var(--abc-radius);
  box-shadow: var(--abc-shadow);
  padding: 0.4rem;
  font-size: 0.92rem;
}

.abc-navbar .dropdown-item {
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  color: var(--abc-ink);
}

.abc-navbar .dropdown-item:hover,
.abc-navbar .dropdown-item:focus {
  background-color: var(--abc-accent-soft);
  color: var(--abc-accent-dark);
}

.navbar-toggler {
  border-color: var(--abc-line);
  padding: 0.4rem 0.55rem;
}

/* ------------------------------------------------------------ buttons --- */

.btn {
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.62rem 1.15rem;
}

.btn-abc-primary {
  background-color: var(--abc-accent);
  border: 1px solid var(--abc-accent);
  color: #fff;
}

.btn-abc-primary:hover,
.btn-abc-primary:focus {
  background-color: var(--abc-accent-dark);
  border-color: var(--abc-accent-dark);
  color: #fff;
}

.btn-abc-outline {
  background-color: transparent;
  border: 1px solid var(--abc-line);
  color: var(--abc-ink);
}

.btn-abc-outline:hover,
.btn-abc-outline:focus {
  border-color: var(--abc-accent);
  color: var(--abc-accent-dark);
  background-color: var(--abc-accent-soft);
}

.btn-abc-onDark {
  background-color: #fff;
  border: 1px solid #fff;
  color: var(--abc-navy);
}

.btn-abc-onDark:hover,
.btn-abc-onDark:focus {
  background-color: #e9f3f1;
  border-color: #e9f3f1;
  color: var(--abc-navy);
}

.btn-abc-ghostDark {
  background-color: transparent;
  border: 1px solid rgba(255, 255, 255, 0.35);
  color: #fff;
}

.btn-abc-ghostDark:hover,
.btn-abc-ghostDark:focus {
  border-color: #fff;
  background-color: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.abc-arrow-link {
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.abc-arrow-link::after {
  content: "\2192";
  transition: transform 0.15s ease-out;
}

.abc-arrow-link:hover::after { transform: translateX(3px); }

/* --------------------------------------------------------------- hero --- */

.abc-hero {
  background: linear-gradient(180deg, #ffffff 0%, var(--abc-canvas) 100%);
  border-bottom: 1px solid var(--abc-line);
  padding: clamp(2.75rem, 1.5rem + 5vw, 5.5rem) 0 clamp(3rem, 2rem + 4vw, 5rem);
}

.abc-hero h1 { max-width: 22ch; }

.abc-page-head {
  background-color: var(--abc-navy);
  color: #b9c8d2;
  padding: clamp(2.75rem, 2rem + 3vw, 4.25rem) 0;
}

.abc-page-head h1 { color: #fff; }

.abc-page-head p { color: #b9c8d2; }

/* --------------------------------------------- conceptual illustration -- */

.abc-diagram {
  background: var(--abc-surface);
  border: 1px solid var(--abc-line);
  border-radius: var(--abc-radius-lg);
  box-shadow: var(--abc-shadow);
  padding: 1.4rem;
}

.abc-diagram__caption {
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--abc-muted);
  font-weight: 600;
  margin-bottom: 1.1rem;
}

.abc-diagram__stage + .abc-diagram__stage { margin-top: 0.75rem; }

.abc-diagram__label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--abc-muted);
  margin-bottom: 0.5rem;
}

.abc-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.abc-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.83rem;
  font-weight: 500;
  color: var(--abc-ink);
  background: var(--abc-canvas);
  border: 1px solid var(--abc-line);
  border-radius: 999px;
  padding: 0.34rem 0.7rem;
}

.abc-chip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--abc-muted);
  flex: 0 0 auto;
}

.abc-chip--accent {
  background: var(--abc-accent-soft);
  border-color: #c3e3dd;
  color: var(--abc-accent-dark);
}

.abc-chip--accent .abc-chip__dot { background: var(--abc-accent); }

.abc-diagram__core {
  background: var(--abc-navy);
  border-radius: var(--abc-radius);
  padding: 0.95rem 1.05rem;
  color: #fff;
}

.abc-diagram__core-title {
  font-weight: 600;
  font-size: 0.98rem;
  color: #fff;
  margin-bottom: 0.55rem;
}

.abc-nodes {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.abc-node {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #7fd6c8;
  flex: 0 0 auto;
}

.abc-node--hollow {
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.45);
}

.abc-edge {
  height: 1px;
  flex: 1 1 auto;
  background: rgba(255, 255, 255, 0.3);
  min-width: 10px;
}

.abc-diagram__flow {
  display: block;
  text-align: center;
  color: var(--abc-muted);
  font-size: 1rem;
  line-height: 1;
  margin: 0.55rem 0;
}

/* -------------------------------------------------------------- cards --- */

.abc-card {
  height: 100%;
  background: var(--abc-surface);
  border: 1px solid var(--abc-line);
  border-radius: var(--abc-radius);
  box-shadow: var(--abc-shadow-sm);
  padding: 1.4rem;
  transition: border-color 0.15s ease-out, box-shadow 0.15s ease-out,
    transform 0.15s ease-out;
}

.abc-card:hover {
  border-color: #c9d5d2;
  box-shadow: var(--abc-shadow);
  transform: translateY(-2px);
}

.abc-card h3 { margin-bottom: 0.5rem; }

.abc-card p:last-child { margin-bottom: 0; }

.abc-card__index {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--abc-accent-dark);
  margin-bottom: 0.65rem;
}

.abc-card--flat {
  box-shadow: none;
  background: transparent;
}

.abc-card--flat:hover {
  transform: none;
  box-shadow: none;
}

.abc-icon-square {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--abc-accent-soft);
  color: var(--abc-accent-dark);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.9rem;
}

.abc-icon-square svg { width: 20px; height: 20px; }

/* ------------------------------------------------------ credibility ----- */

.abc-band {
  background: var(--abc-navy-700);
  color: #cddae2;
  padding: 1.6rem 0;
}

.abc-band p {
  margin: 0;
  color: #dbe5eb;
  font-size: 1.03rem;
}

/* ------------------------------------------------------------- steps ---- */

.abc-step {
  position: relative;
  padding-top: 1.1rem;
  border-top: 2px solid var(--abc-line);
  height: 100%;
}

.abc-step__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--abc-navy);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 0.7rem;
}

.abc-step--onDark { border-top-color: rgba(255, 255, 255, 0.18); }

.abc-step--onDark .abc-step__num {
  background: var(--abc-accent);
  color: #fff;
}

/* -------------------------------------------------------- principles --- */

.abc-principle {
  display: flex;
  gap: 0.7rem;
  align-items: flex-start;
}

.abc-principle__mark {
  color: var(--abc-accent);
  flex: 0 0 auto;
  margin-top: 0.2rem;
}

.abc-principle h4 {
  font-size: 1rem;
  margin-bottom: 0.2rem;
}

.abc-principle p {
  margin-bottom: 0;
  font-size: 0.93rem;
}

/* -------------------------------------------------------------- team ---- */

.abc-avatar {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: var(--abc-navy);
  color: #7fd6c8;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.02em;
  flex: 0 0 auto;
}

.abc-avatar--placeholder {
  background: var(--abc-canvas);
  border: 1px dashed #c2ccd2;
  color: var(--abc-muted);
}

.abc-role {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--abc-accent-dark);
  margin-bottom: 0.15rem;
}

.abc-meta {
  font-size: 0.84rem;
  color: var(--abc-muted);
  margin-bottom: 0.7rem;
}

.abc-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #fdf4e7;
  border: 1px solid #f0dfc4;
  color: #8a6520;
}

.abc-tag--neutral {
  background: var(--abc-canvas);
  border-color: var(--abc-line);
  color: var(--abc-muted);
}

/* ------------------------------------------------- services detail ------ */

.abc-service-nav {
  position: sticky;
  top: 92px;
  border: 1px solid var(--abc-line);
  border-radius: var(--abc-radius);
  background: var(--abc-surface);
  padding: 1rem;
}

.abc-service-nav ol {
  list-style: none;
  counter-reset: svc;
  margin: 0;
  padding: 0;
}

.abc-service-nav li { counter-increment: svc; }

.abc-service-nav a {
  display: block;
  padding: 0.35rem 0.1rem;
  font-size: 0.9rem;
  color: var(--abc-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--abc-line);
}

.abc-service-nav li:last-child a { border-bottom: 0; }

.abc-service-nav a::before {
  content: counter(svc) ". ";
  color: var(--abc-muted);
  font-variant-numeric: tabular-nums;
}

.abc-service-nav a:hover { color: var(--abc-accent-dark); }

.abc-service-detail {
  padding: 2rem 0;
  border-top: 1px solid var(--abc-line);
}

.abc-service-detail:first-of-type { border-top: 0; }

.abc-activity-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.abc-activity-list li {
  position: relative;
  padding-left: 1.35rem;
  margin-bottom: 0.4rem;
  font-size: 0.94rem;
}

.abc-activity-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--abc-accent);
}

.abc-callout {
  border-left: 3px solid var(--abc-accent);
  background: var(--abc-accent-soft);
  border-radius: 0 var(--abc-radius) var(--abc-radius) 0;
  padding: 0.9rem 1.1rem;
  font-size: 0.93rem;
  color: #14504a;
}

.abc-callout--neutral {
  border-left-color: #c2ccd2;
  background: var(--abc-canvas);
  color: var(--abc-body);
}

/* --------------------------------------------------------------- form --- */

.abc-form-panel {
  background: var(--abc-surface);
  border: 1px solid var(--abc-line);
  border-radius: var(--abc-radius-lg);
  box-shadow: var(--abc-shadow-sm);
  padding: clamp(1.25rem, 1rem + 1vw, 2rem);
}

.form-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--abc-ink);
  margin-bottom: 0.3rem;
}

.form-control,
.form-select {
  border-radius: 10px;
  border-color: #d7dee2;
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  color: var(--abc-ink);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--abc-accent);
  box-shadow: none;
}

.form-text { font-size: 0.83rem; }

/* ------------------------------------------------------------- footer --- */

.abc-footer {
  background: var(--abc-navy);
  color: #93a7b4;
  padding: 3rem 0 1.75rem;
}

.abc-footer h2,
.abc-footer h3 {
  color: #fff;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
}

.abc-footer .abc-brand,
.abc-footer .abc-brand small { color: #fff; }

.abc-footer .abc-brand small { color: #93a7b4; }

.abc-footer a {
  color: #c2d1da;
  text-decoration: none;
  font-size: 0.93rem;
}

.abc-footer a:hover {
  color: #fff;
  text-decoration: underline;
}

.abc-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.abc-footer li + li { margin-top: 0.45rem; }

.abc-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 2.25rem;
  padding-top: 1.25rem;
  font-size: 0.85rem;
}

/* ------------------------------------------------------ small screens --- */

@media (max-width: 991.98px) {
  .abc-navbar .navbar-collapse {
    border-top: 1px solid var(--abc-line);
    margin-top: 0.65rem;
    padding-top: 0.65rem;
  }

  .abc-navbar .dropdown-menu {
    border: 0;
    box-shadow: none;
    padding-left: 0.6rem;
  }

  .abc-service-nav {
    position: static;
    top: auto;
  }
}

/* --------------------------------------------------- reduced motion ----- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .abc-card:hover { transform: none; }
}