/* ------------------------------------------------
   Collie AI Engineering — Landing Page
   Brandbook: ADLaM Display + Inter
   Palette: Obsidian #0B1220, Royal Blue #2563EB,
            Clover Green #22C55E, White #FFFFFF
   ------------------------------------------------ */

:root {
  /* Palette — Brandbook */
  --color-white: #ffffff;
  --color-bg: #F8FAFC;
  --color-bg-alt: #F1F5F9;
  --color-bg-warm: #FAFAF9;
  --color-obsidian: #0B1220;
  --color-obsidian-soft: #1A1F2B;
  --color-accent: #2563EB;
  --color-accent-dark: #1D4ED8;
  --color-signal: #22C55E;
  --color-text: #0F172A;
  --color-text-secondary: #475569;
  --color-text-muted: #94A3B8;
  --color-border: rgba(226, 232, 240, 0.7);
  --color-border-dark: rgba(255, 255, 255, 0.1);

  /* Typography */
  --font-display: 'ADLaM Display', Georgia, serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  /* Elevation */
  --shadow-xs: 0 1px 3px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 16px 48px -12px rgba(15, 23, 42, 0.08);

  /* Shape */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-pill: 999px;

  /* Layout */
  --container: 1280px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 200ms;
  --duration-normal: 350ms;
}

* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  /* Fluid base: stays 16px up to ~1450px, scales up to 22px on large monitors */
  font-size: clamp(16px, 8px + 0.55vw, 22px);
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 2000;
  padding: 10px 14px;
  border-radius: var(--radius-pill);
  background: var(--color-obsidian);
  color: var(--color-white);
  text-decoration: none;
  transition: top var(--duration-normal) var(--ease-out);
}
.skip-link:focus { top: 16px; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.container {
  width: min(100% - 48px, var(--container));
  margin-inline: auto;
}

/* Wider content band on large monitors (e.g. 27"+) */
@media (min-width: 1600px) { :root { --container: 1440px; } }
@media (min-width: 1920px) { :root { --container: 1600px; } }
@media (min-width: 2400px) { :root { --container: 1780px; } }


/* Navbar */

.navbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  padding: 16px 0;
  transition: background var(--duration-normal) var(--ease-standard),
              border-color var(--duration-normal) var(--ease-standard),
              box-shadow var(--duration-normal) var(--ease-standard),
              padding var(--duration-normal) var(--ease-standard);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled,
body.menu-open .navbar {
  padding: 10px 0;
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: var(--color-border);
  box-shadow: 0 1px 12px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(12px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  flex: 0 0 auto;
}
.brand img { height: 48px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
  transition: color var(--duration-fast) var(--ease-standard);
}
.nav-link:hover { color: var(--color-text); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.mobile-menu-btn span {
  width: 18px;
  height: 2px;
  border-radius: 1px;
  background: var(--color-obsidian);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast);
}
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

.btn-lg { min-height: 48px; padding: 12px 24px; font-size: 0.95rem; }

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
}

.btn-outline {
  color: var(--color-text);
  background: transparent;
  border-color: var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-text-secondary);
  background: rgba(15, 23, 42, 0.02);
}

.btn-ghost {
  color: var(--color-text-secondary);
  background: transparent;
}
.btn-ghost:hover {
  color: var(--color-text);
  background: rgba(15, 23, 42, 0.04);
}


/* Hero */

.hero {
  position: relative;
  min-height: 100dvh;
  display: grid;
  align-items: center;
  padding: 120px 0 72px;
  overflow: hidden;
  isolation: isolate;
}

.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 50% at 85% 40%, rgba(37, 99, 235, 0.08), transparent 60%),
    rgba(248, 250, 252, 0.92);
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -2;
  opacity: 0.55;
}
.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 40px;
  align-items: center;
}

.hero-content {
  padding: 40px 44px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-lg);
  max-width: 560px;
}

.hero-visual {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  padding: 12px;
  overflow: hidden;
  animation: hero-float 7s ease-in-out infinite;
}

.hero-architecture {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

@keyframes hero-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--color-text-muted);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1, h2, h3 { margin: 0; color: var(--color-obsidian); }

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 4.6vw, 3.8rem);
  font-weight: 400;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

h1 span {
  display: inline-block;
  color: var(--color-accent);
}

.hero-subtitle {
  margin: 20px 0 28px;
  max-width: 58ch;
  color: var(--color-text-secondary);
  font-size: clamp(1rem, 1.3vw, 1.12rem);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}


/* Trust strip */

.trust-strip {
  border-block: 1px solid var(--color-border);
  background: var(--color-bg);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  padding: 16px 0;
}

.trust-grid span {
  color: var(--color-text-secondary);
  font-size: 0.82rem;
  font-weight: 500;
  text-align: center;
}


/* Sections */

.section { padding: 96px 0; }
.section--lg { padding: 120px 0; }
.section--sm { padding: 72px 0; }

.section-header {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}
.section-header.align-left { text-align: left; margin: 0; }

.section-header h2,
.showcase-copy h2,
.cta-card h2 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.5vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.section-header p:not(.section-kicker),
.showcase-copy p,
.cta-card p {
  margin: 14px 0 0;
  color: var(--color-text-secondary);
  font-size: 1.02rem;
  line-height: 1.7;
}


/* Problem section */

.problem { background: var(--color-bg); }

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.comparison-card {
  padding: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-xs);
}

.comparison-card.accent {
  background: var(--color-bg);
  border-color: rgba(37, 99, 235, 0.12);
}

.card-tag {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 5px 10px;
  border-radius: var(--radius-xs);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.card-tag.danger { color: #991B1B; background: #FEF2F2; }
.card-tag.success { color: #166534; background: #F0FDF4; }

.comparison-card h3 {
  font-size: 1.25rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.comparison-card p {
  margin: 10px 0 0;
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.comparison-card ul {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}
.comparison-card li {
  position: relative;
  padding-left: 24px;
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}
.comparison-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
}
.comparison-card:not(.accent) li::before {
  background: #DC2626;
  opacity: 0.6;
}
.comparison-card.accent li::before {
  background: var(--color-signal);
}


/* OpsMesh */

.opsmesh {
  background: var(--color-white);
  border-block: 1px solid var(--color-border);
}

.opsmesh-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  align-items: center;
}

.text-link {
  display: inline-flex;
  margin-top: 20px;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
}
.text-link::after {
  content: '→';
  margin-left: 6px;
  transition: transform var(--duration-normal) var(--ease-out);
}
.text-link:hover::after { transform: translateX(4px); }

.opsmesh-pillars {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.opsmesh-pillars li {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

.opsmesh-pillars strong {
  color: var(--color-obsidian);
  font-weight: 600;
}

.opsmesh-visual,
.dashboard-card {
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
}
.opsmesh-visual img,
.dashboard-card img {
  border-radius: calc(var(--radius-lg) - 8px);
}


/* Platform features */

.platform { background: var(--color-bg); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.feature-card {
  padding: 36px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-xs);
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
}

.feature-card.card-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 24px;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.feature-icon.blue {
  color: var(--color-accent);
  background: #EFF6FF;
}
.feature-icon.green {
  color: var(--color-signal);
  background: #F0FDF4;
}

.feature-card h3 {
  font-size: 1.15rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.feature-card p {
  margin: 8px 0 0;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}


/* Personas */

.personas {
  background: var(--color-obsidian);
  color: var(--color-white);
}
.personas .section-kicker { color: var(--color-text-muted); }
.personas h2 { color: var(--color-white); }

.personas-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.persona-card {
  padding: 36px;
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
  transition: background var(--duration-normal) var(--ease-standard),
              border-color var(--duration-normal) var(--ease-standard);
}
.persona-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.15);
}

.persona-card.card-wide {
  grid-column: 1 / -1;
}

.persona-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.persona-card h3 {
  color: var(--color-white);
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.persona-card p {
  color: #94A3B8;
  margin: 0;
  font-size: 0.92rem;
}


/* Showcase (workflow) */

.showcase {
  background: var(--color-white);
}

.showcase-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  align-items: center;
}

.showcase h2,
.showcase h3 { color: var(--color-obsidian); }
.showcase-copy p { color: var(--color-text-secondary); }
.showcase .section-kicker { color: var(--color-text-muted); }

.check-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 24px;
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-size: 0.92rem;
}

.check-list li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.dashboard-card {
  background: var(--color-white);
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}


/* Integrations */

.integrations { background: var(--color-bg); }

.integration-groups {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.integration-group h4 {
  margin: 0 0 12px;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.integration-group-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.integration-group-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-weight: 500;
  font-size: 0.84rem;
}

/* Legacy flat badges (fallback) */
.integration-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}
.integration-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 14px;
  border-radius: var(--radius-xs);
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  font-weight: 500;
  font-size: 0.84rem;
}


/* CTA */

.cta-section { padding: 32px 0 96px; }

.cta-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-obsidian);
  border: 1px solid var(--color-border-dark);
  color: var(--color-white);
}

.cta-card .section-kicker { color: var(--color-text-muted); }
.cta-card h2 { color: var(--color-white); }
.cta-card p { color: #94A3B8; }

.cta-actions-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
  text-align: center;
}
.cta-actions-col .btn { width: 100%; justify-content: center; }
.cta-actions-col .btn-outline {
  color: var(--color-white);
  border-color: var(--color-border-dark);
  background: transparent;
}
.cta-actions-col .btn-outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}
.cta-note {
  margin: 6px 0 0;
  font-size: 0.8rem;
  color: #64748B;
}


/* Footer */

.footer {
  padding: 64px 0 28px;
  background: var(--color-obsidian);
  color: var(--color-white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-brand img {
  width: 148px;
  height: auto;
  padding: 10px;
  border-radius: var(--radius-sm);
  background: var(--color-white);
}
.footer p,
.footer a { color: #94A3B8; }

.footer h3 {
  margin-bottom: 14px;
  color: var(--color-white);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
}

.footer a {
  display: block;
  margin-top: 8px;
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--duration-fast) var(--ease-standard);
}
.footer a:hover { color: var(--color-white); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border-dark);
  color: #64748B;
}
.footer-bottom p { margin: 0; font-size: 0.85rem; }
.footer-legal { display: flex; gap: 20px; }
.footer-legal a { margin-top: 0; font-size: 0.82rem; }


/* Fade-in animation */

.fade-in-up {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out),
              transform 600ms var(--ease-out);
}
.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}


/* Responsive */

@media (max-width: 1040px) {
  .nav-actions { display: none; }
  .hero-grid,
  .opsmesh-grid,
  .showcase-grid,
  .cta-card { grid-template-columns: 1fr; }
  .hero-content { max-width: none; }
  .hero-visual { order: -1; max-width: 640px; margin-inline: auto; }
  .features-grid,
  .comparison-grid { grid-template-columns: 1fr; }
  .feature-card.card-wide { grid-template-columns: 1fr; }
  .persona-card.card-wide { grid-column: auto; }
  .integration-groups { grid-template-columns: repeat(2, 1fr); }
  .hero { min-height: auto; }
}

@media (max-width: 820px) {
  .container { width: min(100% - 32px, var(--container)); }
  .mobile-menu-btn { display: inline-flex; }
  .nav-links {
    position: fixed;
    inset: 68px 16px auto 16px;
    display: grid;
    gap: 0;
    padding: 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(12px);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-normal) var(--ease-out),
                transform var(--duration-normal) var(--ease-out);
  }
  body.menu-open .nav-links {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-link { padding: 12px 10px; border-radius: var(--radius-xs); }
  .nav-link:hover { background: var(--color-bg); }
  .hero { padding-top: 100px; }
  .hero-content { padding: 24px; }
  .trust-grid,
  .personas-grid,
  .footer-grid { grid-template-columns: 1fr; }
  .trust-grid span { text-align: left; }
  .section { padding: 72px 0; }
  .section-header { margin-bottom: 32px; }
  .cta-card { padding: 28px; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
  .footer-legal { justify-content: center; }
  .integration-groups { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .brand img { height: 40px; width: auto; }
  h1 { font-size: 2.4rem; }
  .hero-actions .btn { width: 100%; }
  .comparison-card,
  .feature-card,
  .persona-card { padding: 24px; }
  .opsmesh-visual,
  .dashboard-card { padding: 4px; border-radius: var(--radius-md); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in-up { opacity: 1; transform: none; }
  .hero-visual { animation: none; }
}