@import url('https://fonts.googleapis.com/css2?family=Roboto+Slab:wght@400;500;700&display=swap');

:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-hover: #f9f9f9;
  --border: #e8e8e8;
  --text: #363737;
  --text-secondary: #6a6a6a;
  --text-muted: #868787;
  --accent: #ff6719;
  --accent-hover: #e85a10;
  --header-bg: #ffffff;
  --header-text: #363737;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.04);
  --card-shadow-hover: 0 4px 12px rgba(0,0,0,0.08);
  --radius: 4px;
  --font: "Roboto Slab", Georgia, serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header */
.site-header {
  background: var(--header-bg);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.site-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.site-title {
  color: var(--header-text);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  display: block;
}

.site-title:hover {
  color: var(--accent);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
}

/* Main content */
main {
  flex: 1;
  padding: 2.5rem 0;
}

/* Page header */
.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.page-header p {
  color: var(--text-secondary);
  font-size: 1rem;
}

.page-byline {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* Report cards */
.report-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--card-shadow);
  transition: box-shadow 0.2s, transform 0.2s;
}

.report-card:hover {
  box-shadow: var(--card-shadow-hover);
  transform: translateY(-1px);
}

.report-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.report-card .card-title {
  font-size: 1.1rem;
  font-weight: 600;
}

.report-card .card-title a {
  color: var(--text);
  text-decoration: none;
}

.report-card .card-title a:hover {
  color: var(--accent);
}

.report-card .card-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
  margin-left: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.report-card .card-meta {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.report-card .badge {
  display: inline-flex;
  align-items: center;
  background: #fff0e6;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
}

/* Item list inside expanded card */
.report-items {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 0.5rem;
}

.report-items .category-group {
  margin-bottom: 1rem;
}

.report-items .category-group:last-child {
  margin-bottom: 0;
}

.report-items .category-name {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.report-items ul {
  list-style: none;
}

.report-items li {
  padding: 0.4rem 0;
  font-size: 0.9rem;
}

.report-items li a {
  color: var(--text);
  text-decoration: none;
}

.report-items li a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Archive list */
.archive-list {
  list-style: none;
}

.archive-list li {
  border-bottom: 1px solid var(--border);
}

.archive-list li:last-child {
  border-bottom: none;
}

.archive-list .archive-title .badge {
  font-size: 0.7rem;
  margin-right: 0.5rem;
  vertical-align: middle;
}

.archive-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0.5rem;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s;
  border-radius: 4px;
}

.archive-list a:hover {
  background: var(--surface-hover);
}

.archive-list .archive-title {
  font-weight: 500;
  font-size: 0.95rem;
}

.archive-list .archive-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
  margin-left: 1rem;
}

.archive-list .archive-count {
  font-size: 0.8rem;
  color: var(--accent);
  background: #fff0e6;
  padding: 0.15rem 0.5rem;
  border-radius: 10px;
}

.archive-list .archive-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

/* Filter bar */
/* Calendar */
.calendar-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}

.calendar-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.calendar-nav button {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-family: var(--font);
}

.calendar-nav button:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#cal-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 2px;
}

.cal-header {
  text-align: center;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  padding: 0.25rem 0;
}

.cal-empty {
  padding: 0.4rem;
}

.cal-day {
  text-align: center;
  padding: 0.4rem 0.2rem;
  font-size: 0.8rem;
  border-radius: 4px;
  color: var(--text-muted);
}

.cal-day.has-post {
  background: #fff0e6;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.cal-day.has-post:hover {
  background: var(--accent);
  color: #fff;
}

/* Filter bar */
.filter-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 0.4rem 1rem;
  border-radius: 20px;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* States */
.empty {
  text-align: center;
  padding: 3rem 0;
  color: var(--text-muted);
  font-style: italic;
}

/* Report markdown content */
.report-content h2 {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin: 1.25rem 0 0.4rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.report-content h2:first-child {
  border-top: none;
  padding-top: 0;
  margin-top: 0.5rem;
}

.report-content ul {
  list-style: none;
  margin: 0 0 0.5rem;
}

.report-content li {
  padding: 0.35rem 0;
  font-size: 0.9rem;
}

.report-content li a {
  color: var(--text);
  text-decoration: none;
}

.report-content li a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.report-content li a[href*="github.com"] {
  color: var(--accent);
  font-size: 0.8rem;
  opacity: 0.8;
}

.report-content li a[href*="github.com"]:hover {
  opacity: 1;
}

.report-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0.5rem 0;
}

.report-full .report-content {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 0.5rem;
}

/* Section heading */
.section-heading {
  font-size: 1.2rem;
  margin: 2rem 0 1rem;
}

/* Post navigation */
.post-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

.post-nav a {
  color: var(--accent);
  text-decoration: none;
}

.post-nav a:hover {
  text-decoration: underline;
}

.post-nav .next {
  margin-left: auto;
}

/* Footer */
.site-footer {
  background: var(--bg);
  color: var(--text-muted);
  padding: 2.5rem 0;
  font-size: 0.85rem;
  text-align: center;
  border-top: 1px solid var(--border);
}

.footer-author {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.footer-author strong {
  display: block;
  color: var(--text);
  font-size: 0.95rem;
}

.footer-author span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--accent);
}

.footer-note {
  color: var(--text-muted);
  font-size: 0.8rem;
}
}

/* Responsive */
@media (max-width: 600px) {
  .site-header .container {
    flex-direction: column;
    gap: 0.5rem;
  }
  .report-card .card-header {
    flex-direction: column;
    gap: 0.25rem;
  }
  .report-card .card-date {
    margin-left: 0;
  }
  .archive-list a {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
  .archive-list .archive-meta {
    margin-left: 0;
  }
}