/* ============================================================
   SKILLNODE AI — Shared Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500;1,600;1,700&family=Syne:wght@400;500;600;700;800&display=swap');

/* ============================================================
   CSS RESET
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, video { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
p, h1, h2, h3, h4, h5, h6 { overflow-wrap: break-word; }

/* ============================================================
   DESIGN TOKENS
   ============================================================ */
:root {
  --ink: #0c0c0b;
  --ink-2: #4a4a46;
  --ink-3: #8a8a84;
  --ink-4: #b8b8b0;
  --bg: #f8f7f2;
  --bg-2: #efeee8;
  --bg-3: #e5e4dc;
  --white: #ffffff;
  --accent: #c8f03c;
  --accent-dark: #8aaa1a;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 2px 16px rgba(0,0,0,0.07);
  --border: 1px solid rgba(0,0,0,0.09);
  --border-strong: 1px solid rgba(0,0,0,0.18);
  --font-display: 'Lora', Georgia, serif;
  --font-body: 'Syne', system-ui, sans-serif;
}

/* ============================================================
   BASE BODY
   ============================================================ */
body {
  font-family: var(--font-body);
  background-color: var(--bg);
  color: var(--ink);
  font-size: 1rem;
  line-height: 1.65;
}

/* ============================================================
   SKIP LINK (ACCESSIBILITY)
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--ink);
  color: var(--bg);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s;
}
.skip-link:focus { top: 1rem; }

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(248, 247, 242, 0.92);
  border-bottom: var(--border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow 0.2s;
}
.nav.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.08); }
.nav-inner {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}
.nav-logo em { font-style: italic; color: var(--ink); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.375rem 0.6rem;
  border-radius: 100px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--ink); background: var(--bg-2); }
.nav-links a.active { color: var(--ink); font-weight: 600; }
.nav-cta { white-space: nowrap; flex-shrink: 0; }
.nav-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--ink);
  font-size: 1.5rem;
  line-height: 1;
}

/* Tablet nav — tighten before going hamburger */
@media (max-width: 1024px) {
  .nav-inner { gap: 1rem; }
  .nav-links { gap: 0; }
  .nav-links a { font-size: 0.75rem; padding: 0.35rem 0.5rem; }
}

/* Mobile nav */
@media (max-width: 860px) {
  .nav-hamburger { display: flex; align-items: center; }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: var(--border-strong);
    flex-direction: column;
    gap: 0;
    padding: 1rem;
    box-shadow: var(--shadow);
    z-index: 99;
  }
  .nav-links a { display: block; padding: 0.75rem 1rem; width: 100%; border-radius: var(--radius-sm); font-size: 0.9375rem; }
  .nav.menu-open .nav-links { display: flex; }
  .nav-cta { display: none; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--ink);
  color: var(--bg);
  padding: 4rem 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  display: block;
  margin-bottom: 0.75rem;
}
.footer-logo em { font-style: italic; }
.footer-tagline { color: rgba(255,255,255,0.5); font-size: 0.875rem; line-height: 1.6; max-width: 280px; }
.footer-col h4 { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.4); margin-bottom: 1rem; }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-col ul li a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
}
.footer-col ul li a:hover { color: var(--white); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 0;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.45); text-decoration: none; }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr 1fr; gap: 2rem; }
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .container { padding: 0 1.25rem; }
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}
h1 { font-size: clamp(2.25rem, 5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); font-weight: 700; }
h3 { font-size: clamp(1.25rem, 2.5vw, 1.75rem); font-weight: 600; }
h4 { font-size: 1.125rem; font-weight: 600; }
h1 em, h2 em, h3 em { font-style: italic; }
p { color: var(--ink-2); }
.lead { font-size: 1.125rem; line-height: 1.7; color: var(--ink-2); }
.eyebrow {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-3);
  margin-bottom: 0.75rem;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.75rem 1.5rem;
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  white-space: nowrap;
}
.btn:hover { opacity: 0.85; }
.btn:active { transform: scale(0.98); }
.btn:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.btn-accent { background: var(--accent); color: var(--ink); }
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-ghost { background: transparent; color: var(--ink); border: var(--border-strong); }
.btn-ghost:hover { background: var(--bg-2); }
.btn-sm { padding: 0.5rem 1.1rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

/* ============================================================
   TAGS / BADGES
   ============================================================ */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.75rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--bg-2);
  color: var(--ink-2);
}
.tag-green { background: #dcfce7; color: #166534; }
.tag-blue { background: #dbeafe; color: #1e40af; }
.tag-purple { background: #f3e8ff; color: #7e22ce; }
.tag-amber { background: #fef3c7; color: #92400e; }
.tag-lime { background: var(--accent); color: var(--ink); }
.tag-dark { background: var(--ink); color: var(--bg); }

/* ============================================================
   SECTIONS
   ============================================================ */
.section { padding: 6rem 0; }
.section-sm { padding: 3rem 0; }
.section-dark { background: var(--ink); color: var(--bg); }
.section-dark h2, .section-dark h3 { color: var(--white); }
.section-dark p { color: rgba(255,255,255,0.65); }
.section-muted { background: var(--bg-2); }

/* ============================================================
   GRID HELPERS
   ============================================================ */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 4rem 0; }
  .section-sm { padding: 2rem 0; }
}

/* ============================================================
   FORM ELEMENTS
   ============================================================ */
.form-group { display: flex; flex-direction: column; gap: 0.375rem; margin-bottom: 1.25rem; }
.form-group label { font-size: 0.875rem; font-weight: 600; color: var(--ink); }
.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.75rem 1rem;
  border: var(--border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--white);
  transition: border-color 0.15s, box-shadow 0.15s;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(12,12,11,0.07);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group .error-msg { font-size: 0.8125rem; color: #dc2626; margin-top: 0.25rem; display: none; }
.form-group.has-error input,
.form-group.has-error select,
.form-group.has-error textarea { border-color: #dc2626; }
.form-group.has-error .error-msg { display: block; }
.form-checkboxes { display: flex; flex-direction: column; gap: 0.625rem; }
.form-checkboxes label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9375rem;
  font-weight: 400;
  cursor: pointer;
}
.form-checkboxes input[type="checkbox"] { width: 1rem; height: 1rem; accent-color: var(--ink); cursor: pointer; flex-shrink: 0; }

/* ============================================================
   FADE-IN ANIMATION
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.d1 { transition-delay: 0.1s; }
.d2 { transition-delay: 0.2s; }
.d3 { transition-delay: 0.3s; }
.d4 { transition-delay: 0.4s; }
.d5 { transition-delay: 0.5s; }

/* ============================================================
   MISC UTILITIES
   ============================================================ */
.text-center { text-align: center; }
.text-muted { color: var(--ink-3); font-size: 0.875rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* ============================================================
   SMALL SCREEN FIXES
   ============================================================ */
@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  .nav-inner { padding: 0 1rem; }
  .btn-lg { padding: 0.875rem 1.5rem; font-size: 0.9375rem; }
}