/* ============================================================
   BASE.CSS — Fundamental styles (body, typography, layout utils)
   aventium.ai static rebuild
   Depends on: tokens.css (must be loaded first)
   ============================================================ */


/* ----------------------------------------------------------
   GLOBAL — html, body
   ---------------------------------------------------------- */

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  line-height: var(--leading-normal);
  color: var(--foreground);
  background-color: var(--background);
}

/* Text selection */
::selection {
  background-color: var(--primary-25);
  color: var(--foreground);
}


/* ----------------------------------------------------------
   FOCUS VISIBLE — keyboard navigation a11y
   ---------------------------------------------------------- */

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* Remove outline for mouse users only */
:focus:not(:focus-visible) {
  outline: none;
}


/* ----------------------------------------------------------
   TYPOGRAPHY — headings
   ---------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tighter);
  color: var(--foreground);
}

/* Homepage hero h1 */
h1.hero-title {
  font-size: var(--text-hero);
  letter-spacing: var(--tracking-tight);
}

/* Subpage hero h1 */
h1.subhero-title {
  font-size: var(--text-subhero);
  letter-spacing: var(--tracking-tighter);
}

/* Section headings — h2 */
h2 {
  font-size: var(--text-h2);
  max-width: var(--text-max);
}

/* Card/feature headings — h3 */
h3 {
  font-size: var(--text-2xl);
  font-weight: var(--font-semibold);
  letter-spacing: -0.02em;
  line-height: var(--leading-snug);
}

h4 {
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
}

/* ----------------------------------------------------------
   TYPOGRAPHY — body text
   ---------------------------------------------------------- */

p {
  line-height: var(--leading-relaxed);
  color: var(--muted-foreground);
}

/* Lead paragraph (larger intro text under headings) */
p.lead {
  font-size: var(--text-xl);
  line-height: var(--leading-normal);
  max-width: var(--text-max-sm);
  color: var(--muted-foreground);
}

/* Small text */
small,
.text-sm {
  font-size: var(--text-sm);
}

.text-xs {
  font-size: var(--text-xs);
}

/* ----------------------------------------------------------
   TYPOGRAPHY — lists
   ---------------------------------------------------------- */

ul:not([class]),
ol:not([class]) {
  padding-inline-start: 1.5em;
}

ul:not([class]) li,
ol:not([class]) li {
  margin-block: 0.5em;
  color: var(--muted-foreground);
}

/* ----------------------------------------------------------
   TYPOGRAPHY — links
   ---------------------------------------------------------- */

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--foreground);
}

/* Nav link with animated underline */
.nav-link {
  position: relative;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--muted-foreground);
  transition: color var(--duration-fast) ease;
}

.nav-link:hover {
  color: var(--foreground);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-base) ease;
}

.nav-link:hover::after,
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--foreground);
}


/* ----------------------------------------------------------
   LAYOUT — container
   ---------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1rem; /* 16px mobile */
}

@media (min-width: 640px) {
  .container {
    padding-inline: var(--container-padding); /* 24px desktop */
  }
}

/* Narrower container for hero/centered content */
.container--content {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

/* Text block max-width utilities */
.text-max     { max-width: var(--text-max); }
.text-max-sm  { max-width: var(--text-max-sm); }


/* ----------------------------------------------------------
   LAYOUT — section padding
   ---------------------------------------------------------- */

.section-py {
  padding-top: var(--section-py-sm);
  padding-bottom: var(--section-py-sm);
}

@media (min-width: 768px) {
  .section-py {
    padding-top: var(--section-py-md);
    padding-bottom: var(--section-py-md);
  }
}

@media (min-width: 1024px) {
  .section-py {
    padding-top: var(--section-py);
    padding-bottom: var(--section-py);
  }
}


/* ----------------------------------------------------------
   LAYOUT — grids (reusable)
   ---------------------------------------------------------- */

.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}


/* ----------------------------------------------------------
   CARDS — base card style
   ---------------------------------------------------------- */

.card {
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  transition:
    transform var(--transition-base),
    border-color var(--transition-base),
    box-shadow var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--border-primary-strong);
  box-shadow: var(--shadow-glow-cyan);
}

/* Card variant — Deep Indigo bg */
.card--indigo {
  background-color: var(--card-bg);
  border-color: var(--border);
}

/* Card variant — transparent with primary border */
.card--outline {
  background-color: transparent;
  border-color: var(--border-primary);
}

.card--outline:hover {
  border-color: rgba(6, 182, 212, 0.5);
}


/* ----------------------------------------------------------
   BUTTONS — base
   ---------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 2rem;
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: 1;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    transform var(--transition-fast),
    box-shadow var(--transition-fast);
  white-space: nowrap;
}

/* Primary button — cyan */
.btn--primary {
  background-color: var(--primary);
  color: var(--primary-foreground);
  border-color: var(--primary);
}

.btn--primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  color: var(--primary-foreground);
  transform: scale(1.02);
  box-shadow: var(--shadow-glow-cyan-strong);
}

.btn--primary:active {
  transform: scale(0.98);
}

/* Outline button */
.btn--outline {
  background-color: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn--outline:hover {
  background-color: var(--primary-10);
  color: var(--primary);
}

/* Large modifier */
.btn--lg {
  padding: 1rem 2rem;
  font-size: var(--text-base);
  border-radius: var(--radius);
}


/* ----------------------------------------------------------
   BADGES / TAGS
   ---------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--muted-foreground);
  background-color: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.badge--primary {
  color: var(--primary);
  background-color: var(--primary-10);
  border-color: transparent;
}


/* ----------------------------------------------------------
   SCROLL REVEAL — initial states (JS adds .is-visible)
   ---------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-reveal) var(--ease-spring),
    transform var(--duration-reveal) var(--ease-spring);
}

/* Stagger children — JS sets --stagger-delay on each child */
.stagger > * {
  opacity: 0;
  transform: translateY(30px);
}

.stagger > *.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--duration-reveal) var(--ease-spring) var(--stagger-delay, 0ms),
    transform var(--duration-reveal) var(--ease-spring) var(--stagger-delay, 0ms);
}


/* ----------------------------------------------------------
   SECTION BACKGROUNDS — utility classes
   ---------------------------------------------------------- */

.bg-default   { background-color: var(--background); }
.bg-surface   { background-color: var(--surface-alt); }
.bg-section   { background-color: var(--section-alt); }
.bg-footer    { background-color: var(--footer-bg); }


/* ----------------------------------------------------------
   ACCESSIBILITY — 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-width: 0;
}

.sr-only-focusable:focus,
.sr-only-focusable:focus-within {
  position: static;
  width: auto;
  height: auto;
  padding: 0;
  margin: 0;
  overflow: visible;
  clip: auto;
  white-space: normal;
}


/* ----------------------------------------------------------
   SKIP LINK — keyboard accessibility
   ---------------------------------------------------------- */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: var(--z-modal);
  padding: 0.75rem 1.5rem;
  background-color: var(--primary);
  color: var(--primary-foreground);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-sm);
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 1rem;
}


/* ----------------------------------------------------------
   DIVIDERS
   ---------------------------------------------------------- */

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin-block: var(--space-8);
}

.divider {
  width: 100%;
  height: 1px;
  background-color: var(--border);
}


/* ----------------------------------------------------------
   TEXT UTILITIES
   ---------------------------------------------------------- */

.text-primary    { color: var(--primary); }
.text-muted      { color: var(--muted-foreground); }
.text-foreground { color: var(--foreground); }
.text-gold       { color: var(--warm-gold); }

.text-center  { text-align: center; }
.text-left    { text-align: left; }

.font-semibold  { font-weight: var(--font-semibold); }
.font-bold      { font-weight: var(--font-bold); }
.italic         { font-style: italic; }

.uppercase {
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* Cyan glow text effect (used on h1 accent spans) */
.text-glow-cyan {
  color: var(--primary);
  text-shadow: 0 0 40px rgba(6, 182, 212, 0.4);
}


/* ----------------------------------------------------------
   ICON UTILITIES
   ---------------------------------------------------------- */

/* Lucide icons in migration will become inline SVG —
   this class ensures consistent sizing and color */
.icon {
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}

.icon--primary { color: var(--primary); }

/* Icon hover glow (replaces group-hover:drop-shadow in Tailwind) */
.icon-glow:hover,
.card:hover .icon-glow {
  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.4));
}


/* ----------------------------------------------------------
   RESPONSIVE UTILITIES
   ---------------------------------------------------------- */

.hidden-mobile {
  display: none;
}

@media (min-width: 1024px) {
  .hidden-mobile  { display: block; }
  .hidden-desktop { display: none; }
}