/* =============================================================
   GangBoxAI Base Styles — v2 (AI-Forward Redesign)
   Reset, typography, global defaults (mobile-first)
   ============================================================= */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  background-color: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Typography ──────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: var(--leading-tight);
  color: var(--color-text);
  font-weight: var(--weight-bold);
  letter-spacing: -0.025em;
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  font-family: var(--font-sans);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: var(--max-width-prose);
}

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

a:hover {
  color: var(--color-electric-hover);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
}

strong { font-weight: var(--weight-bold); }
em     { font-style: italic; }

/* ── Images & Media ──────────────────────────────────────────── */
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

/* ── Forms ───────────────────────────────────────────────────── */
input, button, textarea, select {
  font: inherit;
}

/* ── Layout Helpers ──────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

@media (min-width: 1280px) {
  .container { padding-inline: var(--space-12); }
}

/* ── Accessibility ───────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--color-electric);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.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;
}

/* ── Reduced Motion ──────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Skip Link ───────────────────────────────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: var(--z-toast);
  padding: var(--space-2) var(--space-4);
  background: var(--color-electric);
  color: var(--color-white);
  border-radius: var(--radius-md);
  font-weight: var(--weight-semibold);
  transition: top var(--transition-fast);
}

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

/* ── Section Spacing ─────────────────────────────────────────── */
.section {
  padding-block: var(--space-16);
}

@media (min-width: 768px) {
  .section { padding-block: var(--space-20); }
}

@media (min-width: 1024px) {
  .section { padding-block: var(--space-24); }
}

.section--tight {
  padding-block: var(--space-10);
}

@media (min-width: 768px) {
  .section--tight { padding-block: var(--space-12); }
}

/* Dark sections */
.section--dark {
  background-color: var(--color-ink);
  color: var(--color-text-on-dark);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--dark p {
  color: var(--color-text-on-dark);
}

.section--dark p {
  color: var(--color-muted-on-dark);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--color-white);
}

/* Dark accent sections */
.section--dark-accent {
  background-color: var(--color-slate);
  color: var(--color-text-on-dark);
}

.section--dark-accent h1,
.section--dark-accent h2,
.section--dark-accent h3,
.section--dark-accent h4 {
  color: var(--color-white);
}

.section--dark-accent p {
  color: var(--color-muted-on-dark);
}

/* Light sections */
.section--light {
  background-color: var(--color-canvas);
}

.section--surface {
  background-color: var(--color-surface);
}

/* Legacy aliases */
.section--navy {
  background-color: var(--color-ink);
  color: var(--color-text-on-dark);
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy p {
  color: var(--color-white);
}

.section--bg {
  background-color: var(--color-canvas);
}

/* ── Text Utilities ──────────────────────────────────────────── */
.text-electric { color: var(--color-electric); }
.text-cyan     { color: var(--color-cyan); }
.text-lime     { color: var(--color-lime); }
.text-amber    { color: var(--color-amber); }
.text-muted    { color: var(--color-muted); font-family: var(--font-sans); }
.text-center   { text-align: center; }
.text-left     { text-align: left; }
.font-heading  { font-family: var(--font-heading); }
.font-mono     { font-family: var(--font-mono); }
.font-sans     { font-family: var(--font-sans); }
.font-serif    { font-family: var(--font-serif); }

/* Legacy aliases */
.text-navy     { color: var(--color-electric); }
.text-action   { color: var(--color-electric); }

/* ── Divider ─────────────────────────────────────────────────── */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--space-8);
}

/* ── List Reset ──────────────────────────────────────────────── */
ul, ol {
  list-style: none;
}

/* ── Overline / Badge ─────────────────────────────────────────── */
.overline {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-electric);
  padding: var(--space-1) var(--space-3);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-4);
}

.section--dark .overline,
.section--dark-accent .overline {
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.3);
  color: var(--color-cyan);
}

/* ── Blueprint Grid Background ────────────────────────────────── */
.bg-grid {
  position: relative;
}

.bg-grid::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.bg-grid > * {
  position: relative;
  z-index: 1;
}

/* ── Theme Transition ─────────────────────────────────────────── */
html:not([data-reduce-motion]) body,
html:not([data-reduce-motion]) .navbar,
html:not([data-reduce-motion]) .section,
html:not([data-reduce-motion]) .card,
html:not([data-reduce-motion]) .btn {
  transition: background-color 350ms ease, color 350ms ease,
              border-color 350ms ease, box-shadow 350ms ease;
}

/* ── Dark Mode: Section Overrides ─────────────────────────────── */
[data-theme="dark"] .section--dark {
  background-color: #080C14;
}

[data-theme="dark"] .section--dark-accent {
  background-color: var(--color-slate);
}

[data-theme="dark"] .overline {
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(59, 130, 246, 0.25);
  color: var(--color-cyan);
}

[data-theme="dark"] hr {
  border-top-color: var(--color-border);
}

[data-theme="dark"] .bg-grid::before {
  background-image:
    linear-gradient(rgba(59, 130, 246, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 130, 246, 0.06) 1px, transparent 1px);
}

/* ── View Transitions ─────────────────────────────────────────── */
@view-transition {
  navigation: auto;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 200ms;
}