/* ============================================================
   MHF Design System — mastafafoufa.com
   Shared styles. Page-specific layout goes inline per file.
   ============================================================ */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Lato:wght@400;700&family=Lora:ital,wght@0,400;0,700;1,400&family=Playfair+Display:ital,wght@0,700;0,900;1,400&display=swap');

/* --- Design Tokens --- */
:root {
  --bg:            #FAFAF8;
  --text:          #1C1C1A;
  --heading:       #0A0A09;
  --accent:        #1A5276;
  --accent-light:  #2E86C1;
  --gold:          #B8962E;
  --border:        #E8E6E0;
  --secondary-bg:  #F2F0EC;
  --muted:         #7A7872;
  --black:         #000000;
  --white:         #FFFFFF;
}

/* --- Base --- */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Lato', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 18px;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

h1, h2, h3, h4 { color: var(--heading); margin-top: 0; }
a { color: var(--accent); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-light); text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* --- Layout Container --- */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* --- Section Labels --- */
.section-label {
  font-family: 'Lato', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin-top: 5rem;
  margin-bottom: 2.5rem;
}

/* --- Navigation --- */
.site-header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

.site-logo {
  font-family: 'Lato', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 6px;
  color: var(--heading);
  text-decoration: none;
}
.site-logo:hover { text-decoration: none; color: var(--heading); }

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}
.site-nav a {
  font-family: 'Lato', sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.site-nav a:hover { color: var(--accent); text-decoration: none; }

.lang-toggle {
  font-size: 0.78rem !important;
  color: var(--muted) !important;
  border: 1px solid var(--border);
  padding: 4px 11px;
  border-radius: 3px;
  letter-spacing: 2px !important;
}
.lang-toggle:hover {
  color: var(--accent) !important;
  border-color: var(--accent);
  text-decoration: none !important;
}

/* --- Footer --- */
.site-footer {
  text-align: center;
  padding: 4rem 2rem;
  border-top: 1px solid var(--border);
  margin-top: 6rem;
}
.site-footer .social-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.site-footer .social-links a {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text);
}
.site-footer .social-links a:hover { color: var(--accent); }
.site-footer .copyright { font-size: 0.75rem; color: var(--muted); }

/* --- Buttons --- */
.btn-outline {
  display: inline-block;
  padding: 12px 32px;
  border: 2px solid var(--heading);
  color: var(--heading);
  font-family: 'Lato', sans-serif;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-decoration: none;
  transition: all 0.3s;
}
.btn-outline:hover {
  background: var(--heading);
  color: var(--white);
  text-decoration: none;
}

/* --- Badge --- */
.badge {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 20px;
  font-family: 'Lato', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
}
.badge-forthcoming { background: var(--gold); color: #fff; }
.badge-published    { background: var(--accent); color: #fff; }

/* --- Book Panel --- */
.book-panel {
  background: var(--black);
  color: var(--white);
  padding: 3.5rem;
  border-radius: 8px;
  margin: 4rem 0;
}
.book-panel .book-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-style: italic;
  font-weight: 700;
  color: var(--white);
  margin: 0.75rem 0 1.25rem;
  line-height: 1.15;
}
.book-panel .book-publisher {
  font-family: 'Lato', sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 2rem;
}
.book-panel .book-desc {
  font-family: 'Lora', serif;
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.82);
  max-width: 580px;
}

/* --- Deck / Bento Cards --- */
.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}
.deck-card {
  background: var(--secondary-bg);
  padding: 2rem;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.deck-card .card-label {
  font-family: 'Lato', sans-serif;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.deck-card p { font-size: 1rem; margin: 0; }

/* --- Patent / Project Cards --- */
.projects-grid { display: grid; grid-template-columns: 1fr; gap: 1rem; }
.project-card {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 1.5rem;
  border-radius: 8px;
  transition: all 0.25s;
}
.project-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
  border-color: var(--accent);
}
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.5rem;
}
.project-title { font-weight: 700; font-size: 1rem; }
.tech-tag {
  font-size: 0.68rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 4px;
  text-transform: uppercase;
  white-space: nowrap;
  flex-shrink: 0;
}
.tag-patent { background: #e8f6f3; color: #1abc9c; }
.tag-app    { background: #fef9e7; color: #c0932a; }
.tag-pub    { background: #ebf5fb; color: #2980b9; }

/* --- Research Tabs --- */
.research-tabs { display: flex; gap: 1rem; margin-bottom: 2.5rem; }
.tab-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Lato', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--muted);
  padding: 0.5rem 0;
  border-bottom: 3px solid transparent;
  transition: all 0.25s;
}
.tab-btn.active { color: var(--heading); border-bottom-color: var(--accent); }
.tab-btn:hover  { color: var(--accent); }

/* --- Photo Row --- */
.photo-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin: 2.5rem 0;
}
.photo-row figure { margin: 0; }
.photo-row img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: 6px;
}
.photo-row figcaption {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 0.6rem;
  text-align: center;
  font-style: italic;
}

/* --- Blog Post Preview --- */
.post-preview { margin-bottom: 3rem; }
.post-preview h2 {
  font-family: 'Playfair Display', serif;
  font-size: 1.55rem;
  font-weight: 700;
  margin: 0 0 8px;
  line-height: 1.2;
}
.post-preview h2 a { color: var(--heading); }
.post-preview h2 a:hover { color: var(--accent); text-decoration: none; }
.post-date {
  font-size: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.post-excerpt {
  font-family: 'Lora', serif;
  color: #555;
  margin-top: 0.6rem;
  font-size: 0.95rem;
  line-height: 1.65;
}
.post-read-more {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* --- Article Styles --- */
.article-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 5rem 2rem 6rem;
}
.back-link {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 4rem;
}
.back-link:hover { color: var(--accent); text-decoration: none; }
.article-meta {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 2rem;
}
.article-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  line-height: 1.1;
  color: var(--heading);
  margin-bottom: 2.5rem;
  font-weight: 700;
}
.article-body {
  font-family: 'Lora', serif;
  font-size: 1.08rem;
  line-height: 1.9;
  color: var(--text);
}
.article-body p { margin-bottom: 1.8rem; }
.article-body strong { color: var(--heading); }
.dropcap {
  float: left;
  font-family: 'Playfair Display', serif;
  font-size: 4.5rem;
  line-height: 1;
  margin-right: 10px;
  color: var(--heading);
}
.article-footer {
  margin-top: 5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  text-align: center;
  color: var(--muted);
}
.article-footer a { color: var(--accent); font-weight: 700; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .site-header { flex-direction: column; gap: 1.25rem; padding: 1.25rem; }
  .site-nav { gap: 1rem; flex-wrap: wrap; justify-content: center; }
  .book-panel { padding: 2rem 1.75rem; }
  .photo-row { grid-template-columns: 1fr; }
}