/* ==========================================================================
   MSEC EDC Entrepreneurship & Innovation Magazine
   Design System & Editorial Styles
   Source of truth: design.md
   ========================================================================== */

/* 1. Design Tokens */
:root {
  --color-bg: #f5f7f6;
  --color-surface: #ffffff;
  --color-surface-muted: #edf1ee;
  --color-text: #17201d;
  --color-text-light: #3a4742;
  --color-muted: #68736e;
  --color-accent: #247b62;
  --color-accent-hover: #1d654f;
  --color-accent-soft: rgba(36, 123, 98, 0.10);
  --color-border: rgba(23, 32, 29, 0.10);
  --color-border-subtle: rgba(23, 32, 29, 0.06);

  /* Glassmorphism Tokens */
  --glass-bg: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(255, 255, 255, 0.88);
  --glass-shadow: 0 10px 32px rgba(23, 32, 29, 0.06);
  --glass-blur: 16px;

  /* Geometry & Scale */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 9999px;
  --content-width: 1200px;
  --reading-width: 740px;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Newsreader', 'Times New Roman', Georgia, serif;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* 2. Global Resets & Accessibility */
*, *::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);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg, video {
  max-width: 100%;
  height: auto;
  display: block;
}

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

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

@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;
  }
}

/* 3. Typography Scale */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.font-editorial {
  font-family: var(--font-serif);
  font-weight: 500;
  letter-spacing: -0.015em;
}

.display-title {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  line-height: 1.15;
  font-weight: 600;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 600;
}

.card-title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  line-height: 1.3;
  font-weight: 600;
}

p {
  color: var(--color-text-light);
}

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

.text-sm {
  font-size: 0.875rem;
}

.text-xs {
  font-size: 0.75rem;
}

/* 4. Glassmorphism Utilities (design.md Section 4) */
.glass-surface {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  -webkit-backdrop-filter: blur(var(--glass-blur));
  backdrop-filter: blur(var(--glass-blur));
  border-radius: var(--radius-md);
}

.glass-nav {
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 24px rgba(23, 32, 29, 0.04);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.glass-panel {
  background: rgba(255, 255, 255, 0.70);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: var(--glass-shadow);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-lg);
}

.glass-filter {
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(23, 32, 29, 0.08);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-surface,
  .glass-nav,
  .glass-panel,
  .glass-filter {
    background: rgba(255, 255, 255, 0.96) !important;
  }
}

/* 5. Layout Containers */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.reading-container {
  width: 100%;
  max-width: var(--reading-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

main {
  flex: 1 0 auto;
}

/* 6. Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-logo {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: 50%;
  background: #ffffff;
  padding: 2px;
  box-shadow: 0 2px 8px rgba(23, 32, 29, 0.08);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.brand:hover .brand-logo {
  transform: scale(1.05);
}

.brand-badge {
  background: var(--color-accent);
  color: #ffffff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.1;
}

.brand-sub {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-muted);
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-light);
  padding: 0.5rem 0.25rem;
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.search-form-header {
  display: flex;
  align-items: center;
}

.search-form-header input {
  padding: 0.45rem 0.9rem;
  border-radius: 20px;
  font-size: 0.85rem;
  width: 170px;
  transition: width 200ms ease, box-shadow 200ms ease;
}

.search-form-header input:focus {
  width: 210px;
  outline: none;
  box-shadow: 0 0 0 2px var(--color-accent);
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: rgba(36, 123, 98, 0.08);
  border: 1px solid rgba(36, 123, 98, 0.22);
  color: var(--color-accent);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.mobile-menu-btn:hover,
.mobile-menu-btn:active {
  background: var(--color-accent);
  color: #ffffff;
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  display: block;
}

/* 7. Buttons & Badges */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.35rem;
  font-size: 0.925rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 14px rgba(36, 123, 98, 0.25);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-muted);
  border-color: rgba(23, 32, 29, 0.2);
}

.btn-glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: 0 2px 8px rgba(23, 32, 29, 0.04);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: var(--color-text);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.95);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.pill-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: var(--radius-pill);
  background: var(--color-surface-muted);
  color: var(--color-muted);
  border: 1px solid var(--color-border-subtle);
  transition: all var(--transition-fast);
}

.pill-badge-accent {
  background: var(--color-accent-soft);
  color: var(--color-accent);
  border-color: rgba(36, 123, 98, 0.2);
}

/* 8. Hero & Editorial Featured Area */
.magazine-hero {
  padding: 3rem 0 2rem;
}

.hero-editorial-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 2rem;
  align-items: stretch;
}

.featured-story-card {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.featured-story-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(23, 32, 29, 0.09);
}

.featured-story-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #e1e7e4;
}

.featured-story-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 400ms ease;
}

.featured-story-card:hover .featured-story-media img {
  transform: scale(1.03);
}

.featured-story-content {
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.featured-story-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.featured-story-excerpt {
  margin: 1rem 0 1.5rem;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-text-light);
}

.author-chip {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: auto;
}

.author-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-surface-muted);
  object-fit: cover;
}

/* Secondary Editorial Cards */
.hero-secondary-column {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.editorial-compact-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  border: 1px solid var(--color-border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.editorial-compact-card:hover {
  transform: translateY(-2px);
  border-color: rgba(36, 123, 98, 0.3);
}

/* 9. Article Grid */
.articles-section {
  padding: 3rem 0 4rem;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 1rem;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.article-card {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border-subtle);
  box-shadow: 0 4px 18px rgba(23, 32, 29, 0.03);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.article-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(23, 32, 29, 0.07);
}

.article-card-media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #e2e8e5;
}

.article-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease;
}

.article-card:hover .article-card-media img {
  transform: scale(1.04);
}

.article-card-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.article-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.article-card-title {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.article-card-excerpt {
  font-size: 0.925rem;
  line-height: 1.55;
  color: var(--color-muted);
  margin-bottom: 1.25rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 10. Topic Filter Pills */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.filter-pill {
  padding: 0.5rem 1.15rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text-light);
  box-shadow: 0 2px 8px rgba(23, 32, 29, 0.03);
  transition: all var(--transition-fast);
}

.filter-pill:hover,
.filter-pill.active {
  background: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

/* 11. Reading Article Detail View */
.article-header {
  padding: 3rem 0 2rem;
  text-align: center;
}

.article-breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-muted);
  margin-bottom: 1.5rem;
}

.article-featured-image {
  margin: 2rem 0 3rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(23, 32, 29, 0.08);
}

.article-content {
  background: #ffffff;
  padding: 3rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-subtle);
  box-shadow: 0 4px 20px rgba(23, 32, 29, 0.03);
  font-size: 1.125rem;
  line-height: 1.8;
  color: #222b28;
}

.article-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  font-family: var(--font-serif);
}

.article-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.article-content p {
  margin-bottom: 1.5rem;
  color: #2d3834;
}

.article-content blockquote {
  border-left: 3px solid var(--color-accent);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-style: italic;
  color: var(--color-text);
}

/* 12. Footer */
.site-footer {
  background: #131b18;
  color: #c5d0cc;
  padding: 4.5rem 0 2.5rem;
  margin-top: 4rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-heading {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: #9aa8a2;
}

.footer-links a:hover {
  color: #ffffff;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.85rem;
  color: #798782;
}

/* Section Header Layout */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Category Filter Bar (Glassmorphic) */
.filter-bar {
  display: flex;
  gap: 0.55rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 0.65rem;
  margin-bottom: 2.25rem;
  scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-pill);
  font-size: 0.825rem;
  font-weight: 600;
  background: #ffffff;
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  white-space: nowrap;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  text-decoration: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
}

.filter-pill:hover {
  background: #f8faf9;
  border-color: rgba(36, 123, 98, 0.3);
  color: var(--color-accent);
}

.filter-pill.active {
  background: var(--color-accent);
  color: #ffffff !important;
  border-color: var(--color-accent);
  box-shadow: 0 3px 10px rgba(36, 123, 98, 0.25);
}

/* Institutional Vision Spotlight Card */
.vision-spotlight-card {
  margin-top: 4.5rem;
  padding: 2.75rem 2.25rem;
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2.5rem;
  align-items: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.vision-logo-wrap {
  text-align: center;
}

.vision-logo-img {
  width: 105px;
  height: 105px;
  border-radius: 50%;
  background: #ffffff;
  padding: 4px;
  box-shadow: 0 8px 24px rgba(23, 32, 29, 0.08);
  display: inline-block;
}

/* 13. Mobile Drawer Navigation */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 85%;
  max-width: 340px;
  height: 100vh;
  background: #ffffff;
  box-shadow: -10px 0 35px rgba(23, 32, 29, 0.15);
  z-index: 1000;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: right 300ms cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}

.mobile-drawer.open {
  right: 0;
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(20, 29, 26, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 300ms ease, visibility 300ms ease;
}

.drawer-backdrop.active {
  opacity: 1;
  visibility: visible;
}

/* 14. Responsive Breakpoints (design.md Section 8) */
@media (max-width: 1024px) {
  .hero-editorial-grid {
    grid-template-columns: 1fr;
  }
  .article-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 768px) {
  .nav-container {
    height: 68px;
  }
  .nav-links {
    display: none !important;
  }
  .mobile-menu-btn {
    display: flex !important;
  }
  .brand-sub {
    display: none !important;
  }
  .brand-title {
    font-size: 1.15rem !important;
  }
  .brand-logo {
    width: 38px !important;
    height: 38px !important;
  }
  .search-form-header input {
    width: 120px !important;
    font-size: 0.8rem !important;
    padding: 0.35rem 0.7rem !important;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .section-header .btn {
    align-self: flex-start;
  }
  .article-grid {
    grid-template-columns: 1fr;
  }
  .vision-spotlight-card {
    grid-template-columns: 1fr !important;
    text-align: center !important;
    padding: 2rem 1.25rem !important;
    gap: 1.5rem !important;
  }
  .vision-logo-wrap {
    display: flex;
    justify-content: center;
  }
  .vision-logo-img {
    width: 85px !important;
    height: 85px !important;
  }
  .article-content {
    padding: 1.75rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .search-form-header {
    display: none !important;
  }
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}