/* ============================================================
   MethodIA — Component Library
   ============================================================ */

/* ── Skip link ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: var(--space-2) var(--space-4);
  background: var(--action-primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  z-index: var(--z-toast);
  transition: top var(--duration-fast);
}
.skip-link:focus { top: 1rem; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  transition: all var(--duration-normal) var(--ease-standard);
  cursor: pointer;
  border: none;
  text-decoration: none;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--action-primary);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--action-primary);
  color: white;
  box-shadow: var(--shadow-brand);
}
.btn-primary:hover {
  background: var(--action-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-4);
}
.btn-primary:active { transform: translateY(0); }

.btn-accent {
  background: var(--gradient-saffron);
  color: white;
  box-shadow: var(--shadow-accent);
}
.btn-accent:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-default);
}
.btn-ghost:hover {
  border-color: var(--action-primary);
  color: var(--action-primary);
  background: rgba(42, 86, 232, 0.04);
}

.btn-ghost-inverse {
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}
.btn-ghost-inverse:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  color: white;
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: var(--text-lg);
  border-radius: var(--radius-xl);
}
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-sm);
  border-radius: var(--radius-sm);
}
.btn-pill { border-radius: var(--radius-full); }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.badge-brand {
  background: rgba(42, 86, 232, 0.10);
  color: var(--cobalt-600);
  border: 1px solid rgba(42, 86, 232, 0.18);
}
.badge-brand-inverse {
  background: rgba(42, 86, 232, 0.18);
  color: var(--cobalt-200);
  border: 1px solid rgba(42, 86, 232, 0.3);
}
.badge-accent {
  background: rgba(232, 149, 21, 0.12);
  color: var(--saffron-700);
  border: 1px solid rgba(232, 149, 21, 0.2);
}
.badge-accent-inverse {
  background: rgba(232, 149, 21, 0.18);
  color: var(--saffron-300);
  border: 1px solid rgba(232, 149, 21, 0.3);
}

/* ── Nav ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-sticky);
  transition: background var(--duration-normal) var(--ease-standard),
              box-shadow var(--duration-normal) var(--ease-standard);
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-2);
}

/* Dark hero variant — transparent nav over dark sections */
.nav.nav-dark:not(.scrolled) .nav-links a {
  color: rgba(255, 255, 255, 0.78);
}
.nav.nav-dark:not(.scrolled) .nav-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.nav.nav-dark:not(.scrolled) .btn-ghost {
  color: rgba(255, 255, 255, 0.82);
  border-color: rgba(255, 255, 255, 0.28);
}
.nav.nav-dark:not(.scrolled) .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.10);
  border-color: rgba(255, 255, 255, 0.55);
  color: #fff;
}
.nav.nav-dark:not(.scrolled) .nav-toggle {
  color: rgba(255, 255, 255, 0.85);
}
.nav.nav-dark:not(.scrolled) .nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}
.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo img { height: 32px; width: auto; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}
.nav-links a {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color var(--duration-fast), background var(--duration-fast);
}
.nav-links a:hover {
  color: var(--action-primary);
  background: rgba(42, 86, 232, 0.06);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: background var(--duration-fast);
}
.nav-toggle:hover { background: var(--ink-100); }

/* Mobile nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: 68px; left: 0; right: 0;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-default);
  padding: var(--space-4) var(--gutter) var(--space-6);
  box-shadow: var(--shadow-4);
  z-index: var(--z-sticky);
}
.nav-mobile.open { display: block; }

.nav-mobile-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}
.nav-mobile-links a {
  display: block;
  padding: var(--space-3) var(--space-4);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  transition: background var(--duration-fast), color var(--duration-fast);
}
.nav-mobile-links a:hover {
  background: rgba(42, 86, 232, 0.06);
  color: var(--action-primary);
}

/* ── Section layout ── */
.section    { padding: var(--space-24) 0; }
.section-sm { padding: var(--space-16) 0; }
.section-lg { padding: clamp(var(--space-16), 8vw, 8rem) 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ── Typography helpers ── */
.heading-display {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.heading-xl { font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl)); }
.heading-lg { font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl)); }
.heading-md { font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl)); }
.heading-sm { font-size: clamp(var(--text-xl),  2vw, var(--text-2xl)); }

.text-gradient-cobalt {
  background: var(--gradient-cobalt);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-saffron {
  background: var(--gradient-saffron);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Frida ── */
.frida-img    { object-fit: contain; filter: drop-shadow(0 8px 24px rgba(42, 86, 232, 0.25)); }
.frida-float  { animation: frida-float 3s ease-in-out infinite; }
.frida-float-slow { animation: frida-float-slow 5s ease-in-out infinite; }
.frida-celebrate  { animation: frida-celebrate 800ms ease-in-out infinite; }

.frida-glow { position: relative; }
.frida-glow::before {
  content: '';
  position: absolute;
  inset: -15%;
  background: radial-gradient(circle, rgba(42, 86, 232, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
}

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-decelerate),
              transform var(--duration-slow) var(--ease-decelerate);
}
.reveal.visible         { opacity: 1; transform: translateY(0); }
.reveal-delay-1         { transition-delay: 100ms; }
.reveal-delay-2         { transition-delay: 200ms; }
.reveal-delay-3         { transition-delay: 300ms; }
.reveal-delay-4         { transition-delay: 400ms; }

/* ── Section header ── */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.section-eyebrow  { display: inline-block; margin-bottom: var(--space-4); }
.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Screen reader only ── */
.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;
}

/* ── Responsive breakpoints ── */
@media (max-width: 768px) {
  .nav-links,
  .nav-cta .btn-ghost { display: none; }
  .nav-toggle         { display: flex; }
}
@media (min-width: 769px) {
  .nav-mobile { display: none !important; }
}