:root {
  /* Premium Dark Theme Design Tokens */
  --bg-100: #0B0D13;      /* Deep Background */
  --bg-200: #161B22;      /* Surface/Cards */
  --bg-300: #21262D;      /* Lighter Surface */
  --border-color: #30363D;
  
  --primary-100: #3A86FF; /* Vivid Blue */
  --primary-200: #00B4D8;
  --primary-300: #90E0EF;
  
  --accent-100: #8338EC;  /* Purple */
  --accent-200: #FF006E;  /* Pink Accent */
  
  --text-100: #FFFFFF;    /* Pure White for titles */
  --text-200: #8B949E;    /* Muted gray for body */
  --text-300: #6E7681;    /* Very muted for dates */

  --gradient-primary: linear-gradient(135deg, var(--primary-100) 0%, var(--accent-100) 100%);
  --glass-bg: rgba(11, 13, 19, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-100);
  color: var(--text-200);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  color: var(--text-100);
  font-weight: 700;
  line-height: 1.3;
}

a {
  color: var(--primary-100);
  text-decoration: none;
  transition: all 0.2s ease;
}

a:hover {
  filter: brightness(1.2);
}

i, em, address, span, p, a, div, li {
  font-style: normal !important;
}

/* Force Dark Mode defaults */
@media (prefers-color-scheme: light) {
  /* We are committing to the dark premium design as requested */
}


#category-modal-bg {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 10;
  display: none;
  visibility: hidden;
}

#category-modal {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 1.5rem;
  right: 1.5rem;
  z-index: 100;
  max-width: 850px;
  max-height: 60vh;
  border-radius: 1rem;
  padding: 1rem;
  margin: auto;
  background: var(--bg-200);
  display: none;
  visibility: hidden;
  line-height: 140%;
}

#category-modal-content {
  display: relative;
  max-height: calc(100% - 5rem);
  overflow: auto;
}

.modal-topic-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1rem;
}

.modal-cat-item {
  cursor: pointer;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem !important;
  border-radius: 50px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s;
  border: 1px solid var(--border-color);
}

.modal-cat-item .count {
  font-size: 0.75rem;
  opacity: 0.8;
  background: rgba(0,0,0,0.1);
  padding: 2px 6px;
  border-radius: 10px;
}

#category-modal-title {
  margin-bottom: 1rem;
  font-size: 2rem;
  padding: 1rem;
}

/* Global Header */
.global-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0.75rem 1.25rem;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.logo-box {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 800;
  font-family: 'Outfit', sans-serif;
  box-shadow: 0 4px 15px rgba(58, 134, 255, 0.4);
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-100);
  letter-spacing: -0.5px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.action-btn {
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-200);
  transition: color 0.2s;
}

.action-btn:hover {
  color: var(--primary-100);
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--glass-border);
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-container {
  display: flex;
  justify-content: space-around;
  align-items: center;
  max-width: 600px;
  margin: 0 auto;
  padding: 0.75rem 0.5rem;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-300);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  min-width: 64px;
}

.nav-icon {
  font-size: 1.4rem;
  transition: transform 0.3s;
}

.nav-label {
  font-size: 0.7rem;
  font-weight: 600;
}

.nav-item:hover {
  color: var(--text-100);
}

.nav-item.active {
  color: var(--primary-100);
}

.nav-item.active .nav-icon {
  transform: translateY(-2px);
  filter: drop-shadow(0 0 8px var(--primary-100));
}

#category-modal-bg.open,
#category-modal.open {
  display: block;
  visibility: visible;
}

#top-nav {
  width: 100%;
  background-color: var(--bg-100);
  padding: 1rem 0;
  border-bottom: 1px solid var(--bg-200);
}

.nav-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
}

.nav-item {
  color: var(--text-100);
  margin: 0 1.5rem;
  font-size: 1rem;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-item:hover {
  color: var(--text-100);
}

.nav-item.active {
  background-color: var(--accent-100);
  color: var(--text-100);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  margin: 0 0.5rem; /* Reduce margin to compensate for padding */
}

.modal-article,
.modal-article-date {
  display: block;
  color: var(--text-200);
}

.modal-article {
  margin-bottom: 0.5rem;
  padding: 0.5rem 1rem;
  transition: all 0.2s ease-in-out;
}

.modal-article-date {
  font-size: 0.8rem;
}

.modal-article:hover {
  background: var(--bg-300);
}

hr {
  border-top: 2px dashed var(--text-200) !important;
  border-bottom: none !important;
  border-left: none !important;
  border-right: none !important;
  margin-bottom: 1.75rem !important;
}