/* ============================================================
   main.css — Business Research Journal
   Global layout, page structure, nav, footer, components
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--bg-void);
  color:            var(--text-primary);
  min-height:       100vh;
  overflow-x:       hidden;
}

/* ── Background ── */
.site-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.025) 1px, transparent 1px),
    radial-gradient(ellipse 80% 60% at 10% 10%, rgba(0, 100, 160, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 80%, rgba(100, 60, 200, 0.12) 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-void) 0%, #030c1a 100%);
  background-size: 60px 60px, 60px 60px, 100% 100%, 100% 100%, 100% 100%;
}

/* ── Layout ── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-wide {
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ── Navigation ── */
.site-nav {
  position:   fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index:    1000;
  padding:    0 var(--space-lg);
  height:     68px;
  display:    flex;
  align-items: center;
  background: rgba(2, 8, 16, 0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-base),
              border-color var(--transition-base);
}

.site-nav.scrolled {
  background:   rgba(2, 8, 16, 0.92);
  border-color: var(--border-default);
}

.nav-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ── Logo ── */
.nav-logo {
  display:        flex;
  align-items:    center;
  gap:            0.75rem;
  text-decoration: none;
}

.nav-logo-mark {
  font-family:    var(--font-display);
  font-size:      1.5rem;
  font-weight:    800;
  color:          var(--cyan);
  letter-spacing: -0.03em;
  line-height:    1;
  text-shadow:    0 0 20px var(--cyan-glow);
}

.nav-logo-divider {
  width:  1px;
  height: 28px;
  background: linear-gradient(180deg, transparent, var(--border-default), transparent);
}

.nav-logo-text {
  display:     flex;
  flex-direction: column;
  gap:         1px;
}

.nav-logo-title {
  font-family:    var(--font-display);
  font-size:      0.8rem;
  font-weight:    600;
  color:          var(--text-primary);
  letter-spacing: 0.05em;
  line-height:    1;
}

.nav-logo-sub {
  font-family:    var(--font-mono);
  font-size:      0.58rem;
  font-weight:    400;
  color:          var(--text-muted);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height:    1;
}

/* ── Nav Links ── */
.nav-links {
  display:     flex;
  align-items: center;
  gap:         0.25rem;
  list-style:  none;
}

.nav-links a {
  font-family:    var(--font-display);
  font-size:      0.82rem;
  font-weight:    500;
  color:          var(--text-secondary);
  letter-spacing: 0.05em;
  padding:        0.45em 0.85em;
  border-radius:  var(--radius-sm);
  transition:     color var(--transition-fast),
                  background var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-glow);
  transition: transform var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: var(--cyan-ghost);
}

.nav-links a.active::after,
.nav-links a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* ── Main Content ── */
.site-main {
  padding-top: 68px;
  min-height:  calc(100vh - 68px);
}

/* ── Hero Section ── */
.hero {
  padding:          var(--space-3xl) 0 var(--space-2xl);
  text-align:       center;
  position:         relative;
  overflow:         hidden;
}

.hero-canvas {
  position:   absolute;
  inset:      0;
  z-index:    0;
  opacity:    0.5;
  width:      100%;
  height:     100%;
}

.hero-content {
  position:   relative;
  z-index:    1;
}

.hero-eyebrow {
  display:     flex;
  align-items: center;
  justify-content: center;
  gap:         0.75rem;
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-family:    var(--font-display);
  font-size:      clamp(2.5rem, 7vw, 5.5rem);
  font-weight:    800;
  line-height:    1.0;
  letter-spacing: -0.04em;
  color:          var(--text-primary);
  margin-bottom:  var(--space-md);
}

.hero-title span {
  color:       var(--cyan);
  text-shadow: 0 0 30px var(--cyan-glow), 0 0 60px rgba(0, 229, 255, 0.12);
}

.hero-subtitle {
  font-family:  var(--font-body);
  font-size:    clamp(1.1rem, 2.5vw, 1.5rem);
  font-weight:  300;
  font-style:   italic;
  color:        var(--text-secondary);
  max-width:    600px;
  margin:       0 auto var(--space-xl);
  line-height:  1.6;
}

.hero-actions {
  display:     flex;
  gap:         var(--space-md);
  justify-content: center;
  flex-wrap:   wrap;
}

/* ── Section ── */
.section {
  padding: var(--space-2xl) 0;
}

.section-header {
  margin-bottom: var(--space-xl);
}

.section-title {
  font-family:    var(--font-display);
  font-size:      var(--text-2xl);
  font-weight:    700;
  color:          var(--text-primary);
  letter-spacing: -0.02em;
}

/* ── Cards ── */
.card-grid {
  display:               grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap:                   var(--space-lg);
}

.card {
  padding:        var(--space-lg);
  position:       relative;
  overflow:       hidden;
  transition:     transform var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
}

.card-eyebrow {
  margin-bottom: var(--space-sm);
}

.card-title {
  font-family:    var(--font-display);
  font-size:      var(--text-xl);
  font-weight:    600;
  color:          var(--text-primary);
  margin-bottom:  var(--space-sm);
  letter-spacing: -0.02em;
  line-height:    1.25;
}

.card-body {
  font-family: var(--font-body);
  font-size:   var(--text-base);
  color:       var(--text-secondary);
  line-height: var(--leading-normal);
}

.card-meta {
  margin-top:     var(--space-md);
  padding-top:    var(--space-md);
  border-top:     1px solid var(--border-subtle);
  display:        flex;
  align-items:    center;
  justify-content: space-between;
  font-family:    var(--font-mono);
  font-size:      var(--text-xs);
  color:          var(--text-muted);
  letter-spacing: 0.08em;
}

.card-link {
  color:       var(--cyan);
  font-family: var(--font-display);
  font-size:   var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  display:     inline-flex;
  align-items: center;
  gap:         0.35em;
  transition:  gap var(--transition-fast), color var(--transition-fast);
}

.card-link:hover { gap: 0.6em; color: var(--cyan); }
.card-link::after { content: '→'; }

/* ── Page Hero (inner pages) ── */
.page-hero {
  padding:        var(--space-2xl) 0 var(--space-xl);
  border-bottom:  1px solid var(--border-subtle);
}

.page-hero-inner { max-width: 800px; }

.page-title {
  font-size:      clamp(2rem, 5vw, 3.5rem);
  font-weight:    700;
  letter-spacing: -0.03em;
  color:          var(--text-primary);
  margin-bottom:  var(--space-md);
}

.page-description {
  font-family: var(--font-body);
  font-size:   var(--text-lg);
  color:       var(--text-secondary);
  font-style:  italic;
  line-height: var(--leading-loose);
}

/* ── Footer ── */
.site-footer {
  margin-top:     var(--space-3xl);
  padding:        var(--space-2xl) 0 var(--space-xl);
  border-top:     1px solid var(--border-subtle);
  position:       relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
}

.footer-grid {
  display:               grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap:                   var(--space-2xl);
  margin-bottom:         var(--space-xl);
}

.footer-brand-name {
  font-family:    var(--font-display);
  font-size:      var(--text-xl);
  font-weight:    700;
  color:          var(--text-primary);
  margin-bottom:  var(--space-sm);
  letter-spacing: -0.02em;
}

.footer-brand-desc {
  font-family: var(--font-body);
  font-size:   var(--text-sm);
  color:       var(--text-muted);
  line-height: var(--leading-normal);
  font-style:  italic;
  max-width:   320px;
}

.footer-col-title {
  font-family:    var(--font-mono);
  font-size:      var(--text-xs);
  font-weight:    500;
  color:          var(--cyan);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom:  var(--space-md);
}

.footer-links {
  list-style: none;
  display:    flex;
  flex-direction: column;
  gap:        var(--space-sm);
}

.footer-links a {
  font-family:    var(--font-display);
  font-size:      var(--text-sm);
  color:          var(--text-muted);
  transition:     color var(--transition-fast);
  text-decoration: none;
}

.footer-links a:hover { color: var(--text-primary); }

.footer-bottom {
  padding-top:     var(--space-lg);
  border-top:      1px solid var(--border-subtle);
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  flex-wrap:       wrap;
  gap:             var(--space-sm);
}

.footer-copy {
  font-family:    var(--font-mono);
  font-size:      var(--text-xs);
  color:          var(--text-muted);
  letter-spacing: 0.05em;
}

/* ── Article Content ── */
.article-content {
  font-family: var(--font-body);
  font-size:   var(--text-lg);
  line-height: var(--leading-loose);
  color:       var(--text-primary);
  max-width:   720px;
  margin:      0 auto;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
  font-family:    var(--font-display);
  color:          var(--text-primary);
  margin-top:     1.8em;
  margin-bottom:  0.6em;
  line-height:    1.2;
  letter-spacing: -0.02em;
}

.article-content h1 { font-size: var(--text-3xl); }
.article-content h2 { font-size: var(--text-2xl); }
.article-content h3 { font-size: var(--text-xl); }
.article-content h4 { font-size: var(--text-lg); }

.article-content p { margin-bottom: 1.4em; }
.article-content p:last-child { margin-bottom: 0; }

/* ── Lists ── */
.article-content ul,
.article-content ol {
  margin-bottom: 1.4em;
  padding-left:  2em;
}

.article-content ul { list-style-type: disc; }
.article-content ol { list-style-type: decimal; }

.article-content li {
  margin-bottom: 0.5em;
  line-height:   var(--leading-normal);
  color:         var(--text-primary);
}

.article-content li::marker { color: var(--cyan); }

.article-content ul ul,
.article-content ol ol,
.article-content ul ol,
.article-content ol ul {
  margin-top:    0.4em;
  margin-bottom: 0.4em;
}

/* ── Quill indent classes ── */
.article-content .ql-indent-1 { padding-left: 3em; }
.article-content .ql-indent-2 { padding-left: 6em; }
.article-content .ql-indent-3 { padding-left: 9em; }

/* ── Quill alignment classes ── */
.article-content .ql-align-center  { text-align: center; }
.article-content .ql-align-right   { text-align: right; }
.article-content .ql-align-justify { text-align: justify; }

/* ── Blockquote ── */
.article-content blockquote {
  border-left:   3px solid var(--cyan);
  padding:       var(--space-md) var(--space-lg);
  margin:        var(--space-lg) 0;
  background:    var(--cyan-ghost);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style:    italic;
  color:         var(--text-secondary);
}

/* ── Code ── */
.article-content pre {
  background:    rgba(0, 229, 255, 0.04);
  border:        1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding:       var(--space-lg);
  overflow-x:    auto;
  margin-bottom: 1.4em;
}

.article-content code {
  font-family:   var(--font-mono);
  font-size:     var(--text-sm);
  background:    rgba(0, 229, 255, 0.06);
  padding:       0.1em 0.4em;
  border-radius: var(--radius-sm);
  color:         var(--cyan);
}

.article-content pre code {
  background: none;
  padding:    0;
  color:      var(--text-primary);
}

/* ── Images ── */
.article-content img {
  max-width:     100%;
  border-radius: var(--radius-md);
  margin:        var(--space-lg) 0;
  border:        1px solid var(--border-subtle);
}

/* ── Strong / Em / Links ── */
.article-content strong { font-weight: 600; color: var(--text-primary); }
.article-content em     { font-style: italic; color: var(--text-secondary); }

.article-content a {
  color:                var(--cyan);
  text-decoration:      underline;
  text-underline-offset: 3px;
  transition:           opacity var(--transition-fast);
}

.article-content a:hover { opacity: 0.75; }

/* ── Utilities ── */
.text-cyan    { color: var(--cyan); }
.text-purple  { color: var(--purple); }
.text-muted   { color: var(--text-muted); }
.text-center  { text-align: center; }
.text-right   { text-align: right; }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { flex-direction: column; }
.gap-sm       { gap: var(--space-sm); }
.gap-md       { gap: var(--space-md); }
.gap-lg       { gap: var(--space-lg); }

.mt-sm  { margin-top: var(--space-sm); }
.mt-md  { margin-top: var(--space-md); }
.mt-lg  { margin-top: var(--space-lg); }
.mt-xl  { margin-top: var(--space-xl); }
.mb-sm  { margin-bottom: var(--space-sm); }
.mb-md  { margin-bottom: var(--space-md); }
.mb-lg  { margin-bottom: var(--space-lg); }
.mb-xl  { margin-bottom: var(--space-xl); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links   { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero        { padding: var(--space-2xl) 0 var(--space-xl); }
  .card-grid   { grid-template-columns: 1fr; }
}

/* ── Quill paragraph heading pattern ── */
/* When a centered bold paragraph is used as a section heading */
.article-content p.ql-align-center > strong,
.article-content p.ql-align-center > b {
  display:        block;
  font-family:    var(--font-display);
  font-size:      var(--text-xl);
  font-weight:    700;
  color:          var(--cyan);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top:     1.8em;
  margin-bottom:  0.6em;
  text-shadow:    0 0 20px var(--cyan-glow);
}

/* Center aligned paragraphs */
.article-content p.ql-align-center {
  text-align: center;
}

/* Right aligned paragraphs */
.article-content p.ql-align-right {
  text-align: right;
}

/* Justified paragraphs */
.article-content p.ql-align-justify {
  text-align: justify;
}