/* Keller AI Automation — marketing site styles */
:root {
  --bg: #f6f4f0;
  --bg-elevated: #ffffff;
  --ink: #14171c;
  --ink-muted: #4a525c;
  --ink-faint: #7a8490;
  --line: #e2ddd4;
  --accent: #0d6e6e;
  --accent-hover: #0a5757;
  --accent-soft: #e6f3f3;
  --warm: #c45c26;
  --hero-bg: #12151a;
  --hero-ink: #f3f0ea;
  --hero-muted: #a8b0ba;
  --radius: 12px;
  --shadow: 0 12px 40px rgba(20, 23, 28, 0.08);
  --font: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-display: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --max: 1100px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  font-size: 1.05rem;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-hover); }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.6em;
}
h1 { font-size: clamp(2.1rem, 4.5vw, 3.1rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.15rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 650; }
p { margin: 0 0 1em; color: var(--ink-muted); }
.lead { font-size: 1.2rem; color: var(--ink-muted); max-width: 42rem; }

.container {
  width: min(100% - 2.5rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 244, 240, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
}
.logo {
  font-weight: 750;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
  font-size: 1.05rem;
}
.logo span { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--ink-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--ink); }
.nav-cta {
  display: inline-flex !important;
  align-items: center;
  background: var(--accent);
  color: #fff !important;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--accent-hover); color: #fff !important; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  color: var(--ink);
  font-size: 0.9rem;
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    left: 1.25rem;
    right: 1.25rem;
    top: calc(100% + 0.4rem);
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-elevated);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 0.75rem;
    gap: 0.15rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.65rem 0.75rem; border-radius: 8px; }
  .nav-links a:hover { background: var(--accent-soft); }
  .nav-cta { justify-content: center; margin-top: 0.35rem; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  font-weight: 650;
  font-size: 1rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-secondary {
  background: transparent;
  color: var(--hero-ink);
  border: 1px solid rgba(243, 240, 234, 0.35);
}
.btn-secondary:hover { background: rgba(255,255,255,0.08); color: var(--hero-ink); }
.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-outline:hover { border-color: var(--ink-faint); background: var(--bg-elevated); color: var(--ink); }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

/* Hero */
.hero {
  background: var(--hero-bg);
  color: var(--hero-ink);
  padding: clamp(3.5rem, 8vw, 6rem) 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: auto -10% -40% 40%;
  height: 70%;
  background: radial-gradient(ellipse at center, rgba(13, 110, 110, 0.35), transparent 65%);
  pointer-events: none;
}
.hero .container { position: relative; }
.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #7dcdc8;
  margin-bottom: 1rem;
}
.hero h1 { color: var(--hero-ink); max-width: 16ch; }
.hero .lead { color: var(--hero-muted); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2.5rem;
  align-items: end;
}
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.hero-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 16px;
  padding: 1.4rem 1.5rem;
}
.hero-card h3 { color: var(--hero-ink); margin-bottom: 0.75rem; font-size: 1.05rem; }
.hero-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.65rem;
}
.hero-card li {
  color: var(--hero-muted);
  padding-left: 1.4rem;
  position: relative;
  font-size: 0.95rem;
}
.hero-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
}

/* Sections */
.section { padding: clamp(3rem, 6vw, 4.5rem) 0; }
.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-bottom: 2rem;
}
.section-header .lead { margin: 0; }
.section-alt { background: var(--bg-elevated); border-block: 1px solid var(--line); }

.kicker {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

/* Cards / grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
@media (max-width: 900px) {
  .card-grid { grid-template-columns: 1fr; }
}
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 1px 0 rgba(255,255,255,0.6) inset;
}
.section-alt .card { background: var(--bg); }
.card.featured {
  border-color: rgba(13, 110, 110, 0.35);
  box-shadow: var(--shadow);
  position: relative;
}
.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent);
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}
.card p:last-child { margin-bottom: 0; }
.card-icon {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

/* Feature band */
.feature-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}
@media (max-width: 800px) {
  .feature-band { grid-template-columns: 1fr; }
}
.checklist {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}
.checklist li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.7rem;
  color: var(--ink-muted);
}
.checklist .mark {
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}
@media (max-width: 700px) {
  .stat-row { grid-template-columns: 1fr; }
}
.stat {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.1rem;
}
.stat strong {
  display: block;
  color: var(--ink);
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}
.stat span { color: var(--ink-faint); font-size: 0.9rem; }

/* About page credibility */
.cred-list {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0 0;
}
.cred {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 1.1rem 1.2rem;
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.cred .label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}
.cred p { margin: 0; }

/* Contact */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 800px) {
  .contact-layout { grid-template-columns: 1fr; }
}
.form {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: var(--shadow);
}
.form-row { margin-bottom: 1rem; }
.form label {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.35rem;
}
.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
}
.form input:focus,
.form textarea:focus,
.form select:focus {
  outline: 2px solid rgba(13, 110, 110, 0.35);
  border-color: var(--accent);
}
.form textarea { min-height: 140px; resize: vertical; }
.form-note {
  font-size: 0.88rem;
  color: var(--ink-faint);
  margin: 0.75rem 0 0;
}
.form-success {
  display: none;
  background: var(--accent-soft);
  color: var(--accent-hover);
  border: 1px solid rgba(13, 110, 110, 0.25);
  border-radius: 10px;
  padding: 0.9rem 1rem;
  margin-bottom: 1rem;
}
.form-success.show { display: block; }

.cta-band {
  background: var(--hero-bg);
  color: var(--hero-ink);
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
  text-align: center;
}
.cta-band h2 { color: var(--hero-ink); }
.cta-band p { color: var(--hero-muted); max-width: 36rem; margin-inline: auto; }

/* Page hero (inner pages) */
.page-hero {
  padding: clamp(2.5rem, 5vw, 3.5rem) 0 1.5rem;
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { margin-bottom: 0.4em; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.5rem;
  color: var(--ink-faint);
  font-size: 0.92rem;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.footer-inner a { color: var(--ink-muted); text-decoration: none; }
.footer-inner a:hover { color: var(--ink); }
.footer-links { display: flex; gap: 1rem; flex-wrap: wrap; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}