/* Public SEO brand landings: idsaexpress, idsafood, idsaretails, idsaairnet (/idsahome/assets/css/).
   Static only — no PHP. Dependency-free. */

:root {
  color-scheme: light;
  --idsa-bg: #f8fafc;
  --idsa-surface: #ffffff;
  --idsa-text: #0f172a;
  --idsa-muted: #64748b;
  --idsa-border: #e2e8f0;
  --idsa-accent: #0ea5e9;
  --idsa-accent-contrast: #0c4a6e;
  --idsa-radius: 12px;
  --idsa-shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
  --idsa-max: 72rem;
}

.theme-idsaexpress {
  --idsa-accent: #0284c7;
  --idsa-accent-contrast: #0c4a6e;
  --idsa-bg: #f4f7fb;
  --idsa-surface: #ffffff;
  --idsa-text: #0b1f3f;
  --idsa-muted: #4f627d;
  --idsa-border: #d7e0ec;
  --idsa-shadow: 0 8px 22px rgba(8, 32, 74, 0.08), 0 2px 8px rgba(8, 32, 74, 0.06);
}

.theme-idsafood {
  --idsa-accent: #ea580c;
  --idsa-accent-contrast: #7c2d12;
}

.theme-idsaretails {
  --idsa-accent: #7c3aed;
  --idsa-accent-contrast: #4c1d95;
}

.theme-idsaairnet {
  --idsa-accent: #0d9488;
  --idsa-accent-contrast: #134e4a;
}

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

body.shell-brand {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--idsa-text);
  background: var(--idsa-bg);
}

a {
  color: var(--idsa-accent-contrast);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}
a:hover { text-decoration-thickness: 2px; }

.shell-skip {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.shell-skip:focus {
  position: fixed;
  left: 1rem;
  top: 1rem;
  width: auto;
  height: auto;
  padding: 0.5rem 1rem;
  background: var(--idsa-surface);
  border: 2px solid var(--idsa-accent);
  border-radius: 6px;
  z-index: 9999;
}

.shell-wrap {
  max-width: var(--idsa-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.shell-header {
  background: var(--idsa-surface);
  border-bottom: 1px solid var(--idsa-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.shell-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.85rem 0;
}
.shell-brand-mark {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--idsa-text);
}
.shell-header-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}
.shell-header-stack {
  display: grid;
  gap: 0.6rem;
  padding: 0.85rem 0;
}
.shell-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.shell-main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}
.shell-main-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--idsa-border);
  border-radius: 999px;
  padding: 0.45rem 0.85rem;
  text-decoration: none;
  font-size: 0.87rem;
  font-weight: 700;
  color: var(--idsa-accent-contrast);
  background: #fff;
}
.shell-main-nav-link:hover {
  border-color: var(--idsa-accent);
  text-decoration: none;
}
.shell-main-nav-link.is-active {
  background: var(--idsa-accent);
  color: #fff;
  border-color: var(--idsa-accent);
}

.shell-page-hero {
  padding: 2.2rem 0 1.6rem;
  border-bottom: 1px solid var(--idsa-border);
  background:
    radial-gradient(circle at 88% 12%, rgba(2, 132, 199, 0.12), transparent 38%),
    linear-gradient(180deg, #ffffff 0%, #f4f8fd 100%);
}
.shell-page-eyebrow {
  margin: 0 0 0.28rem;
  color: #0c72ad;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.shell-page-hero h1 {
  margin: 0 0 0.6rem;
  font-size: clamp(1.5rem, 3.2vw, 2.15rem);
  line-height: 1.2;
}
.shell-page-intro {
  margin: 0;
  max-width: 50rem;
  color: var(--idsa-muted);
}

.shell-hero {
  padding: 2.75rem 0 2rem;
  background: linear-gradient(180deg, var(--idsa-surface) 0%, var(--idsa-bg) 100%);
  border-bottom: 1px solid var(--idsa-border);
}
.shell-hero-title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.15rem, 2.5vw, 1.35rem);
  font-weight: 700;
  color: var(--idsa-accent-contrast);
  letter-spacing: -0.02em;
}
.shell-hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}
.shell-hero-sub {
  margin: 0;
  max-width: 44rem;
  font-size: 1.1rem;
  color: var(--idsa-muted);
}

.shell-section {
  padding: 2.25rem 0;
}
.shell-section h2 {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}
.shell-section-intro {
  margin: 0 0 1.25rem;
  max-width: 48rem;
  color: var(--idsa-muted);
}

.shell-checklist {
  margin: 0;
  padding-left: 1.25rem;
  max-width: 42rem;
}
.shell-checklist li {
  margin: 0.4rem 0;
  color: var(--idsa-text);
}

.shell-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(15.5rem, 1fr));
}
.shell-card {
  background: var(--idsa-surface);
  border: 1px solid var(--idsa-border);
  border-radius: var(--idsa-radius);
  padding: 1.15rem 1.25rem;
  box-shadow: var(--idsa-shadow);
}
.shell-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}
.shell-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--idsa-muted);
}

.shell-note {
  margin: 0;
  padding: 1rem 1.15rem;
  background: var(--idsa-surface);
  border: 1px solid var(--idsa-border);
  border-radius: var(--idsa-radius);
  font-size: 0.95rem;
  color: var(--idsa-muted);
}

.shell-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
}
.shell-cta--primary {
  background: var(--idsa-accent);
  color: #fff;
  border-color: var(--idsa-accent);
}
.shell-cta--primary:hover {
  filter: brightness(1.05);
  text-decoration: none;
}
.shell-cta--secondary {
  background: var(--idsa-surface);
  color: var(--idsa-accent-contrast);
  border-color: var(--idsa-border);
}
.shell-cta--secondary:hover {
  border-color: var(--idsa-accent);
  text-decoration: none;
}
.shell-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.25rem;
}

.shell-panel {
  background: var(--idsa-surface);
  border: 1px solid var(--idsa-border);
  border-radius: var(--idsa-radius);
  padding: 1.5rem;
  box-shadow: var(--idsa-shadow);
}
.shell-panel h2 { margin-top: 0; }

.shell-trust-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fill, minmax(14rem, 1fr));
}
.shell-trust-item {
  padding: 0.85rem 1rem;
  background: var(--idsa-bg);
  border-radius: 8px;
  border: 1px solid var(--idsa-border);
  font-size: 0.95rem;
}

.shell-band {
  background: linear-gradient(135deg, var(--idsa-surface) 0%, var(--idsa-bg) 100%);
  border-top: 1px solid var(--idsa-border);
  border-bottom: 1px solid var(--idsa-border);
  padding: 2rem 0;
}
.shell-band h2 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
}

.shell-faq {
  max-width: 40rem;
}
.shell-faq details {
  margin: 0 0 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--idsa-surface);
  border: 1px solid var(--idsa-border);
  border-radius: 8px;
}
.shell-faq summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--idsa-text);
}
.shell-faq details[open] summary {
  margin-bottom: 0.5rem;
}
.shell-faq p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--idsa-muted);
}

.shell-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--idsa-border);
  background: var(--idsa-surface);
  font-size: 0.9rem;
  color: var(--idsa-muted);
}
.shell-footer p { margin: 0.5rem 0; }
.shell-footer strong { color: var(--idsa-text); }

.shell-code-comment {
  font-size: 0.8rem;
  color: var(--idsa-muted);
  margin: 0.5rem 0 0;
  font-family: ui-monospace, monospace;
}

/* IDSA Express premium layout extension */
.theme-idsaexpress {
  font-family: "Manrope", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

.theme-idsaexpress .shell-hero {
  background:
    radial-gradient(circle at 85% 15%, rgba(2, 132, 199, 0.14), transparent 40%),
    radial-gradient(circle at 8% 12%, rgba(8, 47, 73, 0.09), transparent 38%),
    linear-gradient(180deg, #ffffff 0%, #f4f8fd 100%);
}

.shell-kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  gap: 0.85rem;
  margin-top: 1.15rem;
}

.shell-kpi-card {
  background: #ffffff;
  border: 1px solid var(--idsa-border);
  border-radius: 10px;
  padding: 0.8rem 0.85rem;
  box-shadow: 0 2px 10px rgba(12, 74, 110, 0.08);
}

.shell-kpi-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #356086;
}

.shell-kpi-value {
  margin-top: 0.25rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: #0d2d57;
}

.shell-kpi-note {
  margin-top: 0.2rem;
  font-size: 0.82rem;
  color: var(--idsa-muted);
}

.shell-grid--feature .shell-card--feature {
  border-top: 3px solid #0596de;
}

.shell-grid--program .shell-card--program {
  background: linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
  border-left: 3px solid #0c72ad;
}

.shell-grid--program .shell-card--program p {
  margin: 0.4rem 0 0;
}

.shell-grid--branch .shell-card--branch {
  border-top: 3px solid #0b4f80;
  background: linear-gradient(180deg, #ffffff 0%, #f3f8fe 100%);
}

.shell-grid--branch .shell-card--branch p {
  margin: 0.38rem 0 0;
}

.shell-timeline {
  margin: 0;
  padding: 0;
  counter-reset: step;
  list-style: none;
  display: grid;
  gap: 0.65rem;
  max-width: 54rem;
}

.shell-timeline li {
  counter-increment: step;
  border: 1px solid var(--idsa-border);
  border-radius: 10px;
  background: #ffffff;
  padding: 0.78rem 0.9rem 0.78rem 3rem;
  position: relative;
  box-shadow: 0 1px 8px rgba(15, 23, 42, 0.05);
}

.shell-timeline li::before {
  content: counter(step);
  position: absolute;
  left: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.65rem;
  height: 1.65rem;
  border-radius: 999px;
  background: #0c72ad;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
}

.shell-checklist--band {
  margin-top: 0.6rem;
  margin-bottom: 0;
}

.theme-idsaexpress .shell-band {
  background:
    linear-gradient(120deg, rgba(8, 47, 73, 0.07) 0%, rgba(2, 132, 199, 0.04) 40%, rgba(255, 255, 255, 0.9) 100%);
}

.shell-panel--split {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1.1fr 1fr;
}

.shell-branch-form {
  display: grid;
  gap: 0.75rem;
  align-content: start;
  background: #f8fbff;
  border: 1px solid var(--idsa-border);
  border-radius: 10px;
  padding: 1rem;
}

.shell-field {
  display: grid;
  gap: 0.34rem;
}

.shell-field span {
  font-size: 0.83rem;
  font-weight: 700;
  color: #244b73;
}

.shell-field input,
.shell-field select {
  width: 100%;
  border: 1px solid #bcd0e4;
  border-radius: 8px;
  background: #fff;
  color: var(--idsa-text);
  padding: 0.6rem 0.7rem;
  font: inherit;
}

.shell-field input:focus,
.shell-field select:focus {
  border-color: #0c72ad;
  box-shadow: 0 0 0 3px rgba(12, 114, 173, 0.16);
  outline: 0;
}

.shell-form-note {
  margin: 0;
  font-size: 0.86rem;
  color: var(--idsa-muted);
}

.shell-calc-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
}

.shell-calc-results {
  margin-top: 1rem;
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}

.shell-result-card {
  background: linear-gradient(180deg, #ffffff 0%, #f4f9ff 100%);
  border: 1px solid var(--idsa-border);
  border-radius: 10px;
  padding: 0.8rem 0.85rem;
}

.shell-result-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: #406286;
}

.shell-result-value {
  margin-top: 0.3rem;
  font-size: 1.15rem;
  font-weight: 800;
  color: #08345d;
}

.shell-panel--deck {
  background:
    radial-gradient(circle at 80% -10%, rgba(2, 132, 199, 0.12), transparent 38%),
    linear-gradient(180deg, #ffffff 0%, #f7fbff 100%);
}

@media (max-width: 920px) {
  .shell-panel--split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .shell-header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .shell-main-nav-link {
    width: 100%;
    justify-content: flex-start;
  }

  .shell-kpi-grid {
    grid-template-columns: 1fr;
  }

  .shell-timeline li {
    padding-left: 2.6rem;
  }
}