:root {
  --bg: #f7f8fa;
  --bg-elev: #ffffff;
  --text: #1c1f24;
  --text-muted: #6b7280;
  --border: #e5e7eb;
  --accent: #2bb24c;
  --accent-weak: #e7f7ec;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 1px rgba(16, 24, 40, 0.04);
  --radius: 10px;
  --sidebar-w: 260px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a;
    --bg-elev: #1c1f24;
    --text: #e7e9ec;
    --text-muted: #9aa1ab;
    --border: #2a2d33;
    --accent: #34c759;
    --accent-weak: #133020;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

#app {
  display: flex;
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */

#sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  padding: 16px 12px;
}

#brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 8px 16px;
  font-weight: 600;
  font-size: 16px;
}

#brand-mark {
  color: var(--accent);
  font-size: 18px;
}

#auth-box {
  padding: 0 4px 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 12px;
}

#user-box {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

#user-box.hidden, .hidden {
  display: none !important;
}

#user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
}

#user-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-muted);
}

#sign-out-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 14px;
}

#add-feed-form {
  display: flex;
  gap: 6px;
  padding: 0 4px 12px;
}

#add-feed-url {
  flex: 1;
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 13px;
}

#add-feed-form button {
  border: none;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  width: 30px;
  cursor: pointer;
  font-size: 15px;
}

#import-opml-row {
  padding: 0 4px 12px;
}

#import-opml-label {
  display: block;
  font-size: 12.5px;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  text-align: center;
  cursor: pointer;
}

#import-opml-label:hover {
  color: var(--accent);
  border-color: var(--accent);
}

#import-opml-input {
  display: none;
}

#feed-list-nav {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.feed-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 8px 10px;
  border: none;
  background: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13.5px;
  color: var(--text);
}

.feed-list-item:hover {
  background: var(--accent-weak);
}

.feed-list-item.active {
  background: var(--accent-weak);
  color: var(--accent);
  font-weight: 600;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.all-dot {
  background: var(--accent);
}

.feed-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.unread-count {
  font-size: 11px;
  color: var(--text-muted);
}

.feed-remove-btn {
  border: none;
  background: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 4px;
  visibility: hidden;
}

.feed-list-item:hover .feed-remove-btn {
  visibility: visible;
}

#sidebar-status {
  font-size: 12px;
  color: var(--text-muted);
  padding: 8px;
}

/* ---------- Main content ---------- */

#content {
  flex: 1;
  min-width: 0;
  padding: 24px 16px 80px;
}

#content-header {
  max-width: 680px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#content-title {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
}

#content-actions {
  display: flex;
  gap: 8px;
}

#content-actions button {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text-muted);
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 12.5px;
  cursor: pointer;
}

#content-actions button:hover {
  color: var(--text);
  border-color: var(--accent);
}

#empty-state,
#connect-state {
  max-width: 680px;
  margin: 60px auto;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

#connect-btn {
  margin-top: 14px;
  border: none;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  padding: 9px 18px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
}

#article-stream {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ---------- Article card ---------- */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.card.in-view {
  opacity: 1;
  transform: translateY(0);
}

.card.is-read {
  opacity: 0.55;
}

.card.is-read.in-view {
  opacity: 0.55;
}

.card-media {
  width: 84px;
  height: 84px;
  flex-shrink: 0;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-body {
  flex: 1;
  min-width: 0;
}

.card-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.card-title {
  font-size: 16px;
  line-height: 1.35;
  margin: 0 0 6px;
  font-weight: 600;
}

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

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

.card-summary {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-actions {
  flex-shrink: 0;
}

.star-btn {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1;
}

.star-btn.starred {
  color: #f5b400;
}

#stream-sentinel {
  height: 1px;
}

#stream-loading {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  padding: 16px;
}

@media (max-width: 760px) {
  #sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 10;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
  }
  #sidebar.open {
    transform: translateX(0);
  }
  #content {
    padding: 16px 12px 80px;
  }
}