/* KnowledgeBricks — site styles
   Color + typography tokens taken from logistics.kbaas.ai global.css */

:root {
  /* Light theme (kept for completeness, dark is default) */
  --bg:            #F4F5F7;
  --bg-nav:        #FAFBFC;
  --bg-elev:       #FFFFFF;
  --bg-accent:    #EEF2F6;
  --text:          #0E1726;
  --text-muted:    #4A5568;
  --text-soft:     #718096;
  --border:        #E2E8F0;
  --accent:        #2B5174;
  --accent-high:   #1A3A5C;
  --accent-low:    #DCE5EE;
  --text-accent:   #1A3A5C;
  --color-free:    #2B7A4B;
  --shadow-sm: 0 1px 2px rgba(14,23,38,.04);
  --shadow-md: 0 2px 8px rgba(14,23,38,.06);
  --shadow-lg: 0 8px 24px rgba(14,23,38,.08);
}

[data-theme="dark"] {
  --bg:            #0B0F17;
  --bg-nav:        #11151E;
  --bg-elev:       #19222F;
  --bg-accent:     #1A1F2A;
  --text:          #E5E9F0;
  --text-muted:    #B8C0CC;
  --text-soft:     #8B95A6;
  --border:        #2D3748;
  --accent:        #6FA0CC;
  --accent-high:   #9BC0E0;
  --accent-low:    #1E2D3D;
  --text-accent:   #9BC0E0;
  --color-free:    #6BB07F;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.3);
  --shadow-md: 0 2px 8px rgba(0,0,0,.4);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.5);
}

/* Reset + base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-feature-settings: "ss01","cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: -.005em;
  background: var(--bg);
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 16px;
}
[data-theme="dark"] body { color: var(--text-muted); }

/* Headings — same scale as MVP */
h1, h2, h3, h4, h5, h6 {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -.025em;
  margin: 0 0 .75rem;
}
h1 { font-size: clamp(2rem, 4vw, 2.75rem); line-height: 1.1; font-weight: 800; letter-spacing: -.035em; }
h2 { font-size: 1.5rem; letter-spacing: -.02em; }
h3 { font-size: 1.15rem; font-weight: 600; letter-spacing: -.015em; }
h4 { font-size: 1rem; font-weight: 600; }

p { margin: 0 0 1.1em; }
a { color: var(--text-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre {
  font-family: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  font-size: .92em;
}
code {
  background: var(--bg-accent);
  padding: .15em .4em;
  border-radius: 4px;
}

ul, ol { padding-left: 1.25rem; margin: 0 0 1.1em; }
li { margin: .25em 0; }

hr { border: 0; border-top: 1px solid var(--border); margin: 3rem 0; }

.muted   { color: var(--text-soft); }
.small   { font-size: .875rem; }
.large   { font-size: 1.1rem; }

/* Skip link */
.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--accent); color: #fff; padding: .5rem 1rem; z-index: 100;
}
.skip:focus { left: 1rem; top: 1rem; }

/* Container */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(17, 21, 30, .85);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
[data-theme="light"] .site-header { background: rgba(250, 251, 252, .85); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}

.brand { display: inline-flex; align-items: center; text-decoration: none; }
.brand-text {
  font-family: "Inter", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -.03em;
  color: var(--text-accent);
  white-space: nowrap;
}
.site-footer .brand-text { font-size: 1.05rem; display: block; margin-bottom: .5rem; }

.primary-nav {
  display: flex; gap: 1.75rem; align-items: center;
}
.nav-link {
  color: var(--text-muted);
  font-size: .92rem;
  font-weight: 500;
  text-decoration: none;
  letter-spacing: -.01em;
  transition: color .15s ease;
}
.nav-link:hover { color: var(--text); text-decoration: none; }
.nav-link.active { color: var(--text-accent); }

.cta-link {
  background: var(--accent);
  color: #fff !important;
  padding: .5rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  font-size: .9rem;
  letter-spacing: -.01em;
  text-decoration: none;
  transition: transform .15s ease, background .15s ease;
}
.cta-link:hover { background: var(--accent-high); transform: translateY(-1px); text-decoration: none; }

.nav-toggle {
  display: none;
  background: transparent; border: 0; cursor: pointer;
  width: 36px; height: 36px;
  flex-direction: column; justify-content: center; gap: 5px;
  padding: 0;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text); margin: 0 auto;
  transition: transform .2s ease;
}

.mobile-nav {
  display: none;
  flex-direction: column; gap: 0;
  border-top: 1px solid var(--border);
  background: var(--bg-nav);
  padding: .5rem 1.5rem 1rem;
}
.mobile-nav:not([hidden]) { display: flex; }
.mobile-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: .75rem 0;
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}
.mobile-nav a:last-child { border-bottom: 0; }

@media (max-width: 880px) {
  .primary-nav { display: none; }
  .nav-toggle { display: flex; }
}

/* Hero */
.hero {
  padding: 5rem 0 4rem;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse at top, var(--accent-low) 0%, transparent 60%);
}
.hero h1 { max-width: 22ch; }
.hero .lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 60ch;
  margin: 1rem 0 2rem;
}
.hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .75rem 1.25rem;
  border-radius: 6px;
  font-family: inherit;
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: -.01em;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, border-color .15s ease;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-high); transform: translateY(-1px); text-decoration: none; }
.btn-ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--text-accent); color: var(--text-accent); text-decoration: none; }

/* Section */
.section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.section:last-of-type { border-bottom: 0; }
.section h2 { font-size: 2rem; letter-spacing: -.025em; margin-bottom: .5rem; }
.section .eyebrow {
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-accent);
  margin-bottom: .75rem;
}
.section .lede {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 64ch;
  margin: 0 0 2rem;
}

.prose { max-width: 68ch; }
.prose p, .prose ul, .prose ol { font-size: 1rem; }
.prose h2 { margin-top: 2.5rem; padding-top: 1rem; border-top: 1px solid var(--border); }
.prose h3 { margin-top: 2rem; }

/* Grid of cards */
.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.card:hover { border-color: var(--text-accent); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.card h3 { margin-top: 0; color: var(--text); }
.card p:last-child { margin-bottom: 0; }
.card .card-link {
  display: inline-block;
  margin-top: .75rem;
  font-weight: 600;
  font-size: .92rem;
  color: var(--text-accent);
}

/* Pricing tiers */
.tiers {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin: 2rem 0;
}
.tier {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
}
.tier.featured { border-color: var(--accent); box-shadow: var(--shadow-md); }
.tier-name { font-size: .85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; color: var(--text-accent); }
.tier-price { font-size: 1.5rem; font-weight: 700; color: var(--text); margin: .5rem 0 .25rem; letter-spacing: -.02em; }
.tier-sub { font-size: .9rem; color: var(--text-soft); margin-bottom: 1rem; }
.tier ul { list-style: none; padding: 0; margin: 1rem 0 0; }
.tier li {
  font-size: .92rem;
  padding: .35rem 0;
  border-bottom: 1px dashed var(--border);
  color: var(--text-muted);
}
.tier li:last-child { border-bottom: 0; }

/* Stats */
.stats {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin: 2rem 0;
}
.stat { text-align: left; }
.stat-num {
  font-size: 2rem; font-weight: 800; letter-spacing: -.03em;
  color: var(--text-accent);
}
.stat-label { font-size: .9rem; color: var(--text-soft); }

/* Callout */
.callout {
  background: var(--accent-low);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  font-size: .98rem;
}
.callout strong { color: var(--text-accent); }

/* Two-col list */
.two-col {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* Comparison table */
.comparison {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: .93rem;
}
.comparison th, .comparison td {
  text-align: left;
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.comparison th {
  color: var(--text-accent);
  font-weight: 600;
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  background: var(--bg-accent);
}
.comparison td { color: var(--text-muted); }
.comparison td strong { color: var(--text); font-weight: 600; }

/* CTA band */
.cta-band {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3rem 2rem;
  margin: 3rem 0;
  text-align: center;
}
.cta-band h2 { margin-bottom: .5rem; }
.cta-band p { font-size: 1.05rem; color: var(--text-muted); max-width: 56ch; margin: 0 auto 1.5rem; }

/* Form */
.form-grid {
  display: grid;
  gap: 1rem;
  max-width: 600px;
}
.form-row { display: flex; flex-direction: column; gap: .35rem; }
.form-row label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.005em;
}
.form-row .req { color: var(--accent); }
.form-row input, .form-row select, .form-row textarea {
  font-family: inherit;
  font-size: .95rem;
  padding: .65rem .85rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  transition: border-color .15s ease;
}
.form-row textarea { min-height: 130px; resize: vertical; }
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-low);
}
.form-row .hint { font-size: .82rem; color: var(--text-soft); }

.alert {
  border-radius: 6px;
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  border: 1px solid;
}
.alert-success { background: rgba(107,176,127,.08); border-color: var(--color-free); color: var(--text); }
.alert-error   { background: rgba(229,72,72,.08); border-color: #E54848; color: var(--text); }

/* Footer */
.site-footer {
  margin-top: 4rem;
  padding: 3rem 0 1.5rem;
  background: var(--bg-nav);
  border-top: 1px solid var(--border);
}
.footer-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: 1.5fr repeat(3, 1fr);
}
@media (max-width: 720px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-grid h4 {
  font-size: .82rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-accent);
  margin-bottom: 1rem;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { padding: .25rem 0; }
.footer-grid a { color: var(--text-muted); font-size: .92rem; }
.footer-grid a:hover { color: var(--text-accent); }

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

/* Tag/Badge */
.badge {
  display: inline-block;
  padding: .2rem .55rem;
  border-radius: 4px;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  background: var(--accent-low);
  color: var(--text-accent);
  border: 1px solid var(--accent);
  margin-left: .5rem;
  vertical-align: middle;
}
.badge-live {
  background: rgba(107,176,127,.12);
  color: var(--color-free);
  border-color: var(--color-free);
}

/* Logo wordmark on hero */
.wordmark {
  font-weight: 800;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -.035em;
  color: var(--text-accent);
}

/* Page intro */
.page-intro {
  padding: 4rem 0 2rem;
  border-bottom: 1px solid var(--border);
}
.page-intro .eyebrow {
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  font-weight: 600;
  color: var(--text-accent);
  margin-bottom: .75rem;
}
.page-intro .lede {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 62ch;
  margin: 1rem 0 0;
  line-height: 1.6;
}