/* ============================================================
   PraxisIQ — Main Stylesheet
   Brand: Lora headings + DM Sans body
   Palette: Indigo / Teal / Coral / Warm neutrals
   ============================================================ */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ---- TOKENS ---- */
:root {
  --indigo-dark: #0E1B3D;
  --indigo: #1B2B5B;
  --indigo-mid: #2D4A8C;
  --teal: #1A9E7A;
  --teal-light: #24C69A;
  --coral: #D85A30;
  --n900: #1C1C1A;
  --n700: #3D3D3A;
  --n500: #73726C;
  --n300: #B4B2A9;
  --n100: #E8E6DE;
  --n50: #F5F4F0;
  --white: #FFFFFF;
  --font-heading: 'Lora', Georgia, 'Times New Roman', serif;
  --font-body: 'DM Sans', Arial, Helvetica, sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--n900);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-heading); }

a { color: var(--indigo-mid); transition: color 0.2s; }
a:hover { color: var(--teal); }

img { max-width: 100%; height: auto; }

/* ---- UTILITIES ---- */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 5rem 0; }
.section--dark {
  background: var(--indigo-dark);
  color: var(--white);
}
.section--subtle { background: var(--n50); }

.text-center { text-align: center; }
.text-muted { color: var(--n500); }

/* ---- TYPOGRAPHY ---- */
.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--indigo);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--n700);
  max-width: 640px;
  line-height: 1.6;
}

.section-heading {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--indigo);
  margin-bottom: 0.5rem;
}

.section-subheading {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--indigo-mid);
  margin-bottom: 0.5rem;
}

.section--dark .section-heading { color: var(--white); }
.section--dark .section-subheading { color: var(--teal-light); }

.tagline {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 400;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--n500);
}

.section--dark .tagline { color: #8899CC; }

/* ---- BUTTONS ---- */
.btn-primary {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--white);
  background: var(--coral);
  padding: 0.875rem 2rem;
  border-radius: 6px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover {
  background: #C04F28;
  color: var(--white);
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--indigo);
  background: transparent;
  padding: 0.875rem 2rem;
  border: 1.5px solid var(--n300);
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
}
.btn-secondary:hover {
  color: var(--teal);
  border-color: var(--teal);
}

.btn-group {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---- NAV ---- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(27,43,91,0.06);
  transition: box-shadow 0.3s;
}
.nav.scrolled { box-shadow: 0 1px 12px rgba(14,27,61,0.08); }

.nav-inner {
  max-width: 1120px; margin: 0 auto;
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.5rem; letter-spacing: -0.5px;
  text-decoration: none;
}
.logo-praxis { font-weight: 700; color: var(--indigo); }
.logo-iq { font-weight: 400; color: var(--teal); }

.nav-links {
  display: flex; align-items: center; gap: 2rem;
  list-style: none;
}
.nav-links a {
  font-size: 0.9375rem; color: var(--n700);
  text-decoration: none; font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] { color: var(--indigo); }

.nav-cta {
  background: var(--coral) !important;
  color: var(--white) !important;
  padding: 0.5rem 1.25rem !important;
  border-radius: 6px;
  font-weight: 500 !important;
  transition: background 0.2s !important;
}
.nav-cta:hover { background: #C04F28 !important; }

.mobile-toggle {
  display: none;
  background: none; border: none; cursor: pointer;
  width: 28px; height: 20px;
  position: relative;
}
.mobile-toggle span {
  display: block; position: absolute; left: 0; right: 0;
  height: 2px; background: var(--n700); border-radius: 1px;
  transition: 0.3s;
}
.mobile-toggle span:nth-child(1) { top: 0; }
.mobile-toggle span:nth-child(2) { top: 9px; }
.mobile-toggle span:nth-child(3) { top: 18px; }

/* ---- HERO ---- */
.hero {
  min-height: 85vh;
  display: flex; align-items: center;
  padding: 6rem 0 4rem;
  background: linear-gradient(170deg, var(--white) 0%, var(--n50) 100%);
}
.hero-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 2rem;
  padding-top: 4rem;
}
.hero-tagline { margin-bottom: 1.25rem; }
.hero h1 {
  font-family: var(--font-heading);
  font-size: 3rem; font-weight: 700;
  color: var(--indigo);
  line-height: 1.15;
  max-width: 720px;
  margin-bottom: 1.25rem;
}
.hero-sub {
  font-size: 1.125rem; color: var(--n700);
  max-width: 600px;
  margin-bottom: 2.25rem; line-height: 1.6;
}

/* ---- CARD GRID ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  border: 1px solid var(--n100);
  border-radius: 8px;
  padding: 2rem;
  transition: box-shadow 0.25s, transform 0.25s;
}
.card:hover {
  box-shadow: 0 4px 24px rgba(14,27,61,0.06);
  transform: translateY(-2px);
}

.card-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  margin-bottom: 1rem;
}
.card-badge--edu { background: rgba(27,43,91,0.08); color: var(--indigo); }
.card-badge--startup { background: rgba(26,158,122,0.1); color: var(--teal); }
.card-badge--enterprise { background: rgba(216,90,48,0.08); color: var(--coral); }

.card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem; font-weight: 700;
  color: var(--indigo);
  margin-bottom: 0.75rem;
}

.card p { color: var(--n700); font-size: 0.9375rem; line-height: 1.6; }

/* ---- RESULTS / METRICS ---- */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
}

.result-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 8px;
  padding: 2rem;
}

.result-metric {
  font-family: var(--font-heading);
  font-size: 2.5rem; font-weight: 700;
  color: var(--teal-light);
  margin-bottom: 0.5rem;
}

.result-label {
  font-size: 1rem; font-weight: 600;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.result-desc {
  font-size: 0.875rem; color: #8899CC;
  line-height: 1.5;
}

/* ---- CONTACT FORM ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.form-group { margin-bottom: 1.25rem; }

.form-group label {
  display: block; font-size: 0.875rem; font-weight: 500;
  color: var(--n700); margin-bottom: 0.375rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; padding: 0.75rem 1rem;
  font-family: var(--font-body); font-size: 0.9375rem;
  border: 1.5px solid var(--n300); border-radius: 6px;
  background: var(--white); color: var(--n900);
  transition: border-color 0.2s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--indigo-mid);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-submit { width: 100%; }

/* ---- FOOTER ---- */
.footer {
  background: var(--indigo-dark);
  padding: 3rem 0 2rem;
}

.footer-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 2rem;
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 1.5rem;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.25rem; letter-spacing: -0.5px;
  text-decoration: none;
}
.footer-praxis { font-weight: 700; color: #B5C4E0; }
.footer-iq { font-weight: 400; color: #24C69A; }

.footer-tagline {
  display: block; font-size: 0.8125rem;
  color: #8899CC; letter-spacing: 2.5px;
  text-transform: uppercase; margin-top: 0.25rem;
}

.footer-links {
  display: flex; gap: 1.5rem;
  list-style: none;
}
.footer-links a {
  font-size: 0.875rem; color: #8899CC;
  text-decoration: none; transition: color 0.2s;
}
.footer-links a:hover { color: var(--teal-light); }

.footer-copy {
  width: 100%; text-align: center;
  font-size: 0.75rem; color: rgba(136,153,204,0.5);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 1.5rem; margin-top: 0.5rem;
}

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---- PAGE HEADER (interior pages) ---- */
.page-header {
  padding: 8rem 0 3rem;
  background: linear-gradient(170deg, var(--white) 0%, var(--n50) 100%);
}

.page-header .container {
  max-width: 720px;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(16px);
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--n100);
    gap: 1.25rem;
  }
  .mobile-toggle { display: block; }
  .hero-inner { padding-top: 6rem; }
  .hero h1 { font-size: 2rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .form-row { grid-template-columns: 1fr; }
  .card-grid, .results-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
  .page-title { font-size: 2rem; }
}