/* ==========================================================================
   NODUS HUB — Base Styles
   Reset + Typography + Utilities
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
  color: var(--color-primary-light);
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

ul,
ol {
  list-style: none;
}

input,
textarea,
select {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  outline: none;
}

/* ---- Skip Link ---- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-sm);
  z-index: var(--z-toast);
  transition: top var(--duration-fast) var(--ease-out);
}

.skip-link:focus {
  top: var(--space-4);
}

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

/* ---- Section ---- */
.section {
  padding-block: var(--space-24);
}

.section--sm {
  padding-block: var(--space-16);
}

.section--lg {
  padding-block: var(--space-32);
}

/* ---- Typography ---- */
h1, h2, h3, h4, h5, h6 {
  line-height: var(--leading-tight);
  font-weight: var(--weight-bold);
  letter-spacing: -0.02em;
}

.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-glow {
  text-shadow: var(--glow-text);
}

.text-muted {
  color: var(--color-text-secondary);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-md);
  transition: all var(--duration-normal) var(--ease-out);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  box-shadow: var(--glow-sm);
}

.btn--primary:hover {
  background: var(--color-primary-light);
  box-shadow: var(--glow-md);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-light);
}

.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--glow-sm);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
  border-radius: var(--radius-lg);
}

/* ---- Badge / Tag ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid rgba(var(--color-primary-rgb), 0.3);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  background: rgba(var(--color-primary-rgb), 0.08);
}

/* ---- Cards ---- */
.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: all var(--duration-normal) var(--ease-out);
}

.card:hover {
  border-color: rgba(var(--color-primary-rgb), 0.3);
  background: var(--color-bg-card-hover);
  box-shadow: var(--glow-sm);
  transform: translateY(-4px);
}

/* ---- Divider ---- */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
}

/* ---- Scroll Reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.stagger > .reveal:nth-child(1) { transition-delay: 0.05s; }
.stagger > .reveal:nth-child(2) { transition-delay: 0.1s; }
.stagger > .reveal:nth-child(3) { transition-delay: 0.15s; }
.stagger > .reveal:nth-child(4) { transition-delay: 0.2s; }
.stagger > .reveal:nth-child(5) { transition-delay: 0.25s; }
.stagger > .reveal:nth-child(6) { transition-delay: 0.3s; }

/* ---- Focus ---- */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ---- Selection ---- */
::selection {
  background: rgba(var(--color-primary-rgb), 0.3);
  color: var(--color-text);
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
  .section {
    padding-block: var(--space-16);
  }

  .section--lg {
    padding-block: var(--space-20);
  }
}