/* === RESET & BASE === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #F4F2EA;
  --bg-card: #FFFFFF;
  --text-primary: #0A0A0A;
  --text-secondary: #6E685F;
  --text-muted: #8D877C;
  --accent: #D9A321;
  --accent-hover: #C4911B;
  --signal: #F04B23;
  --border: #D6D1C7;
  --border-light: #E8E4DA;
  --tag-bg: #EDEADE;
  --tag-active-bg: #D9A321;
  --tag-active-text: #FFFFFF;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === HEADER === */
.site-header {
  padding: 48px 0 32px;
  border-bottom: 3px solid var(--text-primary);
}

.header-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--signal);
  border: 1.5px solid var(--signal);
  padding: 3px 10px;
  margin-bottom: 12px;
}

.header-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 48px);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.1;
  color: var(--text-primary);
}

.header-subtitle {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* === FILTERS === */
.filters-panel {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

.filter-group {
  margin-bottom: 12px;
}

.filter-label {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.filter-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filter-btn {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.5px;
  padding: 5px 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
}

.filter-btn:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--tag-active-bg);
  border-color: var(--tag-active-bg);
  color: var(--tag-active-text);
}

.filter-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.reset-btn {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 6px 16px;
  border: 1.5px solid var(--text-primary);
  background: transparent;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.15s ease;
}

.reset-btn:hover {
  background: var(--text-primary);
  color: var(--bg);
}

.post-counter {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--text-muted);
}

/* === POSTS === */
.posts-feed {
  padding: 32px 0 64px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 24px;
  margin-bottom: 16px;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.post-card.hidden {
  display: none;
}

.post-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.post-date {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 1.5px;
  color: var(--text-muted);
}

.post-id {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--border);
}

.post-content {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-primary);
  word-wrap: break-word;
}

.post-content strong {
  font-weight: 600;
}

.post-content code {
  font-family: 'Menlo', 'Monaco', monospace;
  font-size: 12px;
  background: var(--tag-bg);
  padding: 2px 6px;
  border: 1px solid var(--border-light);
}

.post-content pre {
  background: var(--tag-bg);
  border: 1px solid var(--border-light);
  padding: 12px;
  margin: 8px 0;
  overflow-x: auto;
  font-family: 'Menlo', 'Monaco', monospace;
  font-size: 12px;
  line-height: 1.5;
}

.post-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--accent);
}

.post-content a:hover {
  color: var(--accent-hover);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.post-tag {
  font-family: var(--font-display);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 3px 8px;
}

.post-tag.tag-industry {
  background: #EDE8D6;
  color: #8B7D5E;
  border: 1px solid #D6CDB5;
}

.post-tag.tag-specialist {
  background: #E2EBE6;
  color: #4A6B5A;
  border: 1px solid #C5D6CC;
}

.post-tag.tag-company {
  background: #E8E2ED;
  color: #6B5A7A;
  border: 1px solid #D1C5D9;
}

/* === FOOTER === */
.site-footer {
  padding: 0 0 48px;
}

.footer-line {
  height: 2px;
  background: var(--text-primary);
  margin-bottom: 16px;
}

.footer-text {
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-align: center;
}

/* === RESPONSIVE === */
@media (max-width: 640px) {
  .container {
    padding: 0 16px;
  }

  .site-header {
    padding: 32px 0 24px;
  }

  .filters-panel {
    padding: 16px 0;
  }

  .filter-btn {
    font-size: 10px;
    padding: 4px 8px;
  }

  .post-card {
    padding: 16px;
    margin-bottom: 12px;
  }

  .post-content {
    font-size: 13px;
  }
}