/* =========================================================================
   FMHub Global — shared stylesheet
   Used by every public page (fm-platform.html, fmhub-marketplace.html, etc.)

   NOTE: this file is intentionally the single source of styling truth.
   Header/nav/footer markup is currently duplicated across each HTML page
   (there is no templating engine yet). When the backend is introduced,
   that markup should move into shared Jinja2 partials — see the TODO in
   README.md. Do not fork this stylesheet per page.
   ========================================================================= */

/* ---- Design tokens ---------------------------------------------------- */
:root {
  /* Brand colours */
  --color-navy-900: #071c2c;
  --color-navy-800: #0b2c45;
  --color-navy-700: #0f3b5c;
  --color-navy-600: #164b72;
  --color-teal-500: #16a087;
  --color-teal-400: #1fbfa0;
  --color-amber-500: #e8a33d;
  --color-amber-600: #cf8a25;

  /* Neutrals */
  --color-white: #ffffff;
  --color-gray-50: #f7f9fb;
  --color-gray-100: #eef2f6;
  --color-gray-200: #dde4ea;
  --color-gray-300: #c3ccd4;
  --color-gray-500: #6b7a87;
  --color-gray-700: #3b4652;
  --color-gray-900: #1b232b;

  /* Semantic */
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-gray-50);
  --color-text: var(--color-gray-900);
  --color-text-muted: var(--color-gray-500);
  --color-border: var(--color-gray-200);
  --color-primary: var(--color-navy-700);
  --color-primary-dark: var(--color-navy-900);
  --color-accent: var(--color-teal-500);
  --color-cta: var(--color-amber-500);
  --color-cta-hover: var(--color-amber-600);

  /* Layout */
  --container-width: 1160px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(7, 28, 44, 0.06), 0 1px 1px rgba(7, 28, 44, 0.04);
  --shadow-md: 0 8px 24px rgba(7, 28, 44, 0.10);
  --shadow-lg: 0 16px 40px rgba(7, 28, 44, 0.16);

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---- Reset -------------------------------------------------------------*/
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { padding: 0; margin: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
button { font-family: inherit; }

/* ---- Layout helpers ----------------------------------------------------*/
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 72px 0; }
.section--alt { background: var(--color-bg-alt); }
.section--dark { background: var(--color-primary-dark); color: var(--color-white); }
.section--tight { padding: 40px 0; }
.text-center { text-align: center; }

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.section-heading { max-width: 680px; margin: 0 auto 48px; }
.section-heading h2 { font-size: 2rem; margin-bottom: 14px; }
.section-heading p { color: var(--color-text-muted); font-size: 1.05rem; }
.section--dark .section-heading p { color: rgba(255,255,255,0.72); }

.grid {
  display: grid;
  gap: 28px;
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
}

/* ---- Buttons -------------------------------------------------------------*/
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease, border-color 0.12s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--color-cta); color: var(--color-navy-900); }
.btn-primary:hover { background: var(--color-cta-hover); }
.btn-outline { background: transparent; border-color: var(--color-gray-300); color: var(--color-text); }
.btn-outline:hover { border-color: var(--color-primary); }
.btn-light { background: var(--color-white); color: var(--color-primary); }
.btn-light:hover { box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--color-white); border-color: rgba(255,255,255,0.35); }
.btn-ghost:hover { border-color: var(--color-white); }
.btn-block { width: 100%; }
.btn-sm { padding: 8px 16px; font-size: 0.85rem; }

/* ---- Header / nav --------------------------------------------------------*/
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}
.brand span { color: var(--color-accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links a {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-gray-700);
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}
.nav-links a:hover, .nav-links a[aria-current="page"] {
  color: var(--color-primary-dark);
  border-bottom-color: var(--color-accent);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle svg { width: 24px; height: 24px; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 24px 20px;
    display: none;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { width: 100%; padding: 10px 0; }
  .nav-actions .btn-outline { display: none; }
}

/* ---- Hero -----------------------------------------------------------------*/
.hero {
  background: linear-gradient(160deg, var(--color-navy-900) 0%, var(--color-navy-700) 60%, var(--color-navy-600) 100%);
  color: var(--color-white);
  padding: 96px 0 80px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.hero h1 { font-size: 2.75rem; line-height: 1.15; margin-bottom: 20px; }
.hero p.lead { font-size: 1.15rem; color: rgba(255,255,255,0.78); max-width: 540px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; margin-top: 48px; flex-wrap: wrap; }
.hero-stats div strong { display: block; font-size: 1.6rem; }
.hero-stats div span { font-size: 0.85rem; color: rgba(255,255,255,0.65); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2.1rem; }
}

/* ---- Cards ------------------------------------------------------------*/
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}
.card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.card p { color: var(--color-text-muted); font-size: 0.95rem; }
.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(22, 160, 135, 0.12);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.card-icon svg { width: 22px; height: 22px; }

.pillar-card { transition: box-shadow 0.15s ease, transform 0.15s ease; }
.pillar-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }

/* ---- Pricing ------------------------------------------------------------*/
.pricing-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.pricing-card--featured {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  position: relative;
}
.pricing-badge {
  position: absolute;
  top: -13px;
  left: 28px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
}
.pricing-tier-name { font-weight: 700; font-size: 1.05rem; }
.pricing-price { font-size: 2.1rem; font-weight: 800; color: var(--color-primary-dark); }
.pricing-price span { font-size: 0.95rem; font-weight: 500; color: var(--color-text-muted); }
.pricing-features li {
  padding: 7px 0;
  font-size: 0.92rem;
  color: var(--color-gray-700);
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.pricing-features li svg { flex-shrink: 0; width: 16px; height: 16px; margin-top: 3px; color: var(--color-accent); }
.pricing-features--on-dark li { color: rgba(255,255,255,0.85); }
.pricing-features--on-dark li svg { color: var(--color-teal-400); }

/* ---- Badges / notices ---------------------------------------------------*/
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}
.badge--accent { background: rgba(22,160,135,0.12); color: var(--color-teal-500); }
.badge--amber { background: rgba(232,163,61,0.15); color: var(--color-amber-600); }

.notice {
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  background: var(--color-bg-alt);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-size: 0.92rem;
  color: var(--color-gray-700);
}
.notice--warning { border-left-color: var(--color-amber-500); }
.notice strong { color: var(--color-text); }

/* ---- Tables ------------------------------------------------------------*/
.table-wrap { overflow-x: auto; }
table.compare {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
table.compare th, table.compare td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.92rem;
}
table.compare th { background: var(--color-bg-alt); font-weight: 700; }
table.compare tr:last-child td { border-bottom: none; }

/* ---- Forms (stubbed — no backend yet) -----------------------------------*/
.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--color-white);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}
.form-note { font-size: 0.8rem; color: var(--color-text-muted); margin-top: 10px; }

/* ---- CTA band ------------------------------------------------------------*/
.cta-band {
  background: linear-gradient(135deg, var(--color-navy-800), var(--color-navy-600));
  color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta-band h3 { font-size: 1.5rem; margin-bottom: 8px; }
.cta-band p { color: rgba(255,255,255,0.75); }

/* ---- Footer ---------------------------------------------------------------*/
.site-footer {
  background: var(--color-navy-900);
  color: rgba(255,255,255,0.65);
  padding: 56px 0 28px;
  margin-top: 96px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-grid h4 { color: var(--color-white); font-size: 0.85rem; margin-bottom: 16px; letter-spacing: 0.03em; }
.footer-grid a, .footer-grid p { font-size: 0.88rem; display: block; margin-bottom: 10px; }
.footer-grid a:hover { color: var(--color-white); }
.footer-brand .brand { color: var(--color-white); margin-bottom: 12px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 0.8rem;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .cta-band { flex-direction: column; align-items: flex-start; }
}

/* ---- Page header (non-homepage hero, shorter) -----------------------------*/
.page-header {
  background: linear-gradient(160deg, var(--color-navy-900), var(--color-navy-700));
  color: var(--color-white);
  padding: 64px 0;
}
.page-header .eyebrow { color: var(--color-amber-500); }
.page-header h1 { font-size: 2.3rem; margin-bottom: 14px; }
.page-header p { color: rgba(255,255,255,0.78); max-width: 620px; font-size: 1.05rem; }
.breadcrumb { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-bottom: 18px; }
.breadcrumb a { color: rgba(255,255,255,0.85); }
.breadcrumb a:hover { text-decoration: underline; }

/* ---- Step / process list -------------------------------------------------*/
.steps { counter-reset: step; }
.step {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}
.step:last-child { border-bottom: none; }
.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-dark);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}
.step h3 { margin-bottom: 6px; font-size: 1.05rem; }
.step p { color: var(--color-text-muted); font-size: 0.94rem; }

/* ---- Marketplace / listing cards ------------------------------------------*/
.listing-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-white);
}
.listing-card-media {
  height: 120px;
  background: linear-gradient(135deg, var(--color-navy-700), var(--color-teal-500));
}
.listing-card-body { padding: 20px; }
.listing-card-body h3 { font-size: 1rem; margin-bottom: 6px; }
.listing-card-meta { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.listing-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 14px;
  margin-top: 14px;
  border-top: 1px solid var(--color-border);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ---- Category chips -------------------------------------------------------*/
.chip-grid { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-gray-700);
  background: var(--color-white);
}

/* ---- Audience toggle (buyer / supplier self-identification) --------------*/
.audience-toggle {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.audience-btn {
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid var(--color-gray-300);
  background: var(--color-white);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  color: var(--color-gray-700);
  transition: background-color 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.audience-btn:hover { border-color: var(--color-primary); }
.audience-btn.is-active {
  background: var(--color-primary-dark);
  color: var(--color-white);
  border-color: var(--color-primary-dark);
}
.audience-panel[hidden] { display: none; }

/* ---- Before/after comparison ----------------------------------------------*/
.compare-card {
  border-radius: var(--radius-lg);
  padding: 32px;
}
.compare-card--old {
  background: var(--color-gray-50);
  border: 1px dashed var(--color-gray-300);
}
.compare-card--new {
  background: var(--color-white);
  border: 1px solid var(--color-accent);
  box-shadow: var(--shadow-md);
}
.compare-card h3 { margin-bottom: 18px; font-size: 1.1rem; }
.compare-list li {
  display: flex;
  gap: 10px;
  padding: 8px 0;
  font-size: 0.95rem;
  align-items: flex-start;
}
.compare-list li svg { flex-shrink: 0; width: 16px; height: 16px; margin-top: 3px; }
.compare-list--old li { color: var(--color-text-muted); }
.compare-list--old li svg { color: var(--color-gray-300); }
.compare-list--new li svg { color: var(--color-accent); }

/* ---- FAQ (native <details>/<summary>, no JS needed) -----------------------*/
.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
}
.faq-item:first-child { border-top: 1px solid var(--color-border); }
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 1rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-accent);
  flex-shrink: 0;
  line-height: 1;
}
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin-top: 12px; color: var(--color-text-muted); font-size: 0.94rem; }

/* ---- Utility ---------------------------------------------------------------*/
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.text-muted { color: var(--color-text-muted); }
.max-w-prose { max-width: 65ch; }