/* ─────────────────────────────────────────────────────────────
   TowerIQ Blog — Shared Stylesheet
   Matches main site design system (index.html)
   ───────────────────────────────────────────────────────────── */

/* ── RESET & BASE ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

:root {
  --navy:          #0A0F1C;
  --navy-mid:      #111827;
  --navy-light:    #1F2937;
  --navy-surface:  #1E2938;
  --copper:        #D4944C;
  --copper-glow:   rgba(212,148,76,0.15);
  --cream:         #FAF7F2;
  --cream-dim:     #E8E4DF;
  --slate:         #94A3B8;
  --slate-dim:     #64748B;
  --slate-dark:    #475569;
  --border:        rgba(148,163,184,0.12);
  --emerald:       #34D399;

  --font-body:     'DM Sans', sans-serif;
  --font-display:  'Fraunces', serif;
  --font-mono:     'JetBrains Mono', monospace;

  --max-width:     960px;
  --section-pad:   clamp(48px, 8vw, 80px);
}

body {
  background: var(--navy);
  color: var(--cream-dim);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ── TOP ACCENT LINE ── */
.blog-accent-line {
  height: 2px;
  background: linear-gradient(90deg, var(--copper), rgba(212,148,76,0.15), transparent);
}

/* ─────────────────────────────────────────
   NAV
   ───────────────────────────────────────── */
nav.blog-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10,15,28,0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
}

.nav-logo-icon {
  width: 34px; height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--copper) 0%, #B87A3A 100%);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.1rem; color: #fff;
  flex-shrink: 0;
}

.nav-logo-wrap { display: flex; flex-direction: column; }

.nav-logo-text {
  font-family: var(--font-display);
  font-weight: 600; font-size: 1.2rem;
  color: var(--cream); line-height: 1.05;
}

.nav-logo-tagline {
  font-family: var(--font-body);
  font-size: 0.62rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--copper); margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.875rem; font-weight: 500;
  color: var(--slate); text-decoration: none;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--cream); }
.nav-links a.active { color: var(--copper); }

.nav-cta {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 1.25rem;
  border-radius: 8px;
  background: var(--copper);
  color: var(--navy);
  font-family: var(--font-body);
  font-weight: 600; font-size: 0.875rem;
  text-decoration: none; border: none;
  cursor: pointer; transition: opacity 0.2s;
  white-space: nowrap;
}

.btn-primary:hover { opacity: 0.88; color: var(--navy); }

/* Mobile hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none; border: none;
  cursor: pointer; padding: 4px;
}
.hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--slate); border-radius: 2px;
  transition: background 0.2s;
}
.hamburger:hover span { background: var(--cream); }

/* Mobile drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--navy);
  z-index: 200;
  flex-direction: column;
  padding: 2rem;
  gap: 1.5rem;
}

.mobile-drawer.open { display: flex; }

.drawer-close {
  align-self: flex-end;
  background: none; border: none;
  color: var(--slate); font-size: 1.5rem;
  cursor: pointer; line-height: 1;
  padding: 4px 8px;
}

.mobile-drawer a {
  font-size: 1.1rem; font-weight: 500;
  color: var(--cream-dim); text-decoration: none;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.mobile-drawer a:hover { color: var(--copper); }

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-inner { padding: 1rem 1.25rem; }
}

/* ─────────────────────────────────────────
   FOOTER
   ───────────────────────────────────────── */
footer.blog-footer {
  border-top: 1px solid var(--border);
  margin-top: 80px;
  padding: 48px 2rem 32px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 3rem;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--slate-dim); margin-bottom: 14px;
}

.footer-links {
  display: flex; flex-direction: column; gap: 10px;
}

.footer-links a {
  font-size: 0.875rem; color: var(--slate);
  text-decoration: none; transition: color 0.2s;
}

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

.footer-brand-tagline {
  font-size: 0.875rem; color: var(--slate);
  line-height: 1.65; margin-top: 12px;
  max-width: 280px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--slate-dim);
}

@media (max-width: 768px) {
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* ─────────────────────────────────────────
   BLOG LISTING PAGE (index.html)
   ───────────────────────────────────────── */
.blog-index-hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 64px 24px 48px;
  text-align: center;
}

.blog-index-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--copper); margin-bottom: 16px;
}

.blog-index-eyebrow::before,
.blog-index-eyebrow::after {
  content: '';
  width: 24px; height: 1px;
  background: var(--copper);
}

.blog-index-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15; color: var(--cream);
  letter-spacing: -0.02em;
}

.blog-index-hero h1 em { font-style: italic; color: var(--copper); }

.blog-index-hero p {
  font-size: 17px; color: var(--slate);
  max-width: 520px; margin: 16px auto 0;
  line-height: 1.75;
}

.blog-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 80px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.blog-card {
  background: var(--navy-mid);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
  text-decoration: none;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color 0.2s, transform 0.2s;
}

.blog-card:hover {
  border-color: rgba(212,148,76,0.35);
  transform: translateY(-2px);
}

.blog-card-tag {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--copper);
}

.blog-card-title {
  font-family: var(--font-display);
  font-size: 19px; font-weight: 700;
  line-height: 1.25; color: var(--cream);
  letter-spacing: -0.01em;
}

.blog-card-title em { font-style: italic; color: var(--copper); }

.blog-card-excerpt {
  font-size: 14px; color: var(--slate);
  line-height: 1.7; flex-grow: 1;
}

.blog-card-meta {
  display: flex; align-items: center;
  justify-content: space-between;
  font-size: 12px; color: var(--slate-dim);
  padding-top: 12px;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.blog-card-read {
  color: var(--copper);
  font-weight: 600; font-size: 12px;
}

/* Featured card (first post) */
.blog-card.featured {
  grid-column: 1 / -1;
  flex-direction: row;
  gap: 32px;
  align-items: flex-start;
}

.blog-card.featured .blog-card-content {
  display: flex; flex-direction: column; gap: 12px; flex: 1;
}

.blog-card.featured .blog-card-title {
  font-size: clamp(20px, 2.5vw, 26px);
}

.blog-card.featured .blog-card-excerpt {
  font-size: 15px;
}

.blog-card-featured-label {
  display: inline-flex;
  align-items: center; gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--emerald);
}

.blog-card-featured-label::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--emerald);
}

@media (max-width: 640px) {
  .blog-card.featured { flex-direction: column; }
  .blog-grid { grid-template-columns: 1fr; }
}

/* ─────────────────────────────────────────
   BLOG POST PAGE
   ───────────────────────────────────────── */

/* Top gradient accent */
.post-accent { height: 2px; background: linear-gradient(90deg, var(--copper), rgba(212,148,76,0.15), transparent); }

/* Breadcrumb */
.blog-breadcrumb {
  padding: 24px 24px 0;
  font-size: 13px; color: var(--slate-dim);
  max-width: var(--max-width); margin: 0 auto;
}

.blog-breadcrumb a {
  color: var(--slate-dim); text-decoration: none;
  transition: color 0.2s;
}

.blog-breadcrumb a:hover { color: var(--copper); }
.blog-breadcrumb .sep { margin: 0 8px; color: var(--slate-dark); }

/* Article header */
.blog-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px var(--section-pad);
  text-align: center;
}

.blog-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--copper); margin-bottom: 20px;
}

.blog-label::before,
.blog-label::after { content: ''; width: 24px; height: 1px; background: var(--copper); }

.blog-header h1 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(30px, 4.5vw, 46px); line-height: 1.15;
  color: var(--cream); letter-spacing: -0.02em; margin-bottom: 20px;
}

.blog-header h1 em { font-style: italic; color: var(--copper); }

.blog-meta { font-size: 14px; color: var(--slate-dim); }
.blog-meta a { color: var(--copper); text-decoration: none; }
.blog-meta span { margin: 0 8px; }

/* Table of Contents */
.blog-toc {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 40px;
}

.blog-toc-inner {
  padding: 24px 28px; border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--navy-mid);
}

.blog-toc-title {
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--slate-dim); margin-bottom: 14px;
}

.blog-toc-list { list-style: none; display: flex; flex-direction: column; gap: 0; }

.blog-toc-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 14px; border-radius: 6px;
  font-size: 14px; color: var(--slate);
  text-decoration: none;
  transition: color 0.2s, background 0.2s, padding-left 0.2s;
  border-left: 2px solid transparent; margin-left: -2px;
}

.blog-toc-link:hover { color: var(--cream); background: rgba(148,163,184,0.04); }

.blog-toc-link.active {
  color: var(--copper);
  border-left-color: var(--copper);
  background: rgba(212,148,76,0.04);
  padding-left: 18px;
}

.blog-toc-num {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--slate-dark); min-width: 20px;
}

/* Article body */
.blog-body {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px var(--section-pad);
}

.blog-body h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(22px, 3vw, 30px); line-height: 1.2;
  color: var(--cream); letter-spacing: -0.01em;
  margin: 48px 0 18px;
}

.blog-body h2 em { font-style: italic; color: var(--copper); }

.blog-body h3 {
  font-family: var(--font-body); font-weight: 600;
  font-size: 19px; line-height: 1.4;
  color: var(--cream); margin: 32px 0 12px;
}

.blog-body p { margin-bottom: 20px; color: var(--cream-dim); font-size: 17px; line-height: 1.85; }
.blog-body p strong { color: var(--cream); font-weight: 600; }
.blog-body a { color: var(--copper); text-decoration: underline; text-decoration-color: rgba(212,148,76,0.3); text-underline-offset: 3px; transition: text-decoration-color 0.2s; }
.blog-body a:hover { text-decoration-color: var(--copper); }

/* Callout block */
.blog-callout {
  margin: 36px 0; padding: 24px 28px;
  border-left: 3px solid var(--copper);
  background: rgba(212,148,76,0.04);
  border-radius: 0 8px 8px 0;
}

.blog-callout p { margin-bottom: 0; font-size: 16px; color: var(--cream-dim); line-height: 1.75; }
.blog-callout p strong { color: var(--cream); }

/* Stat row */
.blog-stat-row {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 16px; margin: 36px 0;
}

.blog-stat {
  padding: 20px; border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--navy-mid); text-align: center;
}

.blog-stat-val {
  font-family: var(--font-display); font-size: 32px;
  font-weight: 700; color: var(--copper);
}

.blog-stat-desc { font-size: 12px; color: var(--slate); margin-top: 6px; line-height: 1.5; }
.blog-stat-source { font-family: var(--font-mono); font-size: 9px; color: var(--slate-dark); margin-top: 6px; letter-spacing: 0.04em; }

/* CTA box */
.blog-cta {
  margin: 48px 0; padding: 32px;
  border-radius: 12px;
  background: var(--navy-mid);
  border: 1px solid rgba(212,148,76,0.15);
  text-align: center;
}

.blog-cta h3 { font-family: var(--font-display); font-size: 22px; color: var(--cream); margin-bottom: 10px; }
.blog-cta h3 em { font-style: italic; color: var(--copper); }
.blog-cta p { font-size: 15px; color: var(--slate); margin-bottom: 20px; }

.blog-cta a {
  display: inline-flex; align-items: center;
  padding: 12px 24px; border-radius: 8px;
  background: var(--copper); color: var(--navy);
  font-weight: 600; font-size: 14px;
  text-decoration: none; transition: opacity 0.2s;
}

.blog-cta a:hover { opacity: 0.88; text-decoration: none; }

/* Footnotes */
.blog-footnotes {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 32px;
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

.blog-footnotes ol {
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.blog-footnotes li {
  font-size: 12px;
  color: var(--slate-dim);
  line-height: 1.6;
}

.blog-footnotes li a {
  color: var(--copper);
  text-decoration: none;
}

.blog-footnotes li a:hover {
  text-decoration: underline;
}

.blog-body sup a {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--copper);
  text-decoration: none;
  vertical-align: super;
  margin-left: 1px;
}

.blog-body sup a:hover { text-decoration: underline; }

/* Related posts */
.blog-related {
  max-width: var(--max-width);
  margin: 0 auto; padding: 0 24px 48px;
}

.blog-related-label {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--slate-dim); letter-spacing: 0.1em;
  text-transform: uppercase; margin-bottom: 14px;
}

.blog-related-links { display: flex; flex-wrap: wrap; gap: 10px; }

.blog-related-link {
  padding: 8px 16px; border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px; color: var(--cream-dim);
  text-decoration: none; transition: border-color 0.2s, color 0.2s;
}

.blog-related-link:hover { border-color: var(--copper); color: var(--copper); }

/* Responsive */
@media (max-width: 600px) {
  .blog-stat-row { grid-template-columns: 1fr; }
  .blog-body, .blog-header, .blog-toc { padding-left: 16px; padding-right: 16px; }
}