:root,
[data-theme='light'] {
  --bg: #f4f7f0;
  --bg-elevated: #ffffff;
  --bg-muted: #eef2e8;
  --text: #1a2e1f;
  --text-secondary: #5f6f62;
  --text-muted: #8a968c;
  --border: rgba(45, 106, 79, 0.12);
  --border-strong: rgba(45, 106, 79, 0.22);
  --accent: #2d6a4f;
  --accent-hover: #245a42;
  --accent-soft: rgba(45, 106, 79, 0.1);
  --accent-softer: rgba(45, 106, 79, 0.06);
  --danger: #b42318;
  --shadow-sm: 0 1px 2px rgba(26, 46, 31, 0.06);
  --shadow-md: 0 8px 24px rgba(26, 46, 31, 0.08);
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 18px;
  --radius-pill: 999px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --safe-bottom: max(16px, env(safe-area-inset-bottom, 0px));
  --keyboard-offset: 0px;
  --compose-block: 76px;
  --theme-color: #f4f7f0;
  color-scheme: light;
}

[data-theme='dark'] {
  --bg: #121814;
  --bg-elevated: #1a221c;
  --bg-muted: #222b24;
  --text: #edf3ee;
  --text-secondary: #b4c0b7;
  --text-muted: #8a968c;
  --border: rgba(149, 213, 178, 0.12);
  --border-strong: rgba(149, 213, 178, 0.24);
  --accent: #52b788;
  --accent-hover: #74c69d;
  --accent-soft: rgba(82, 183, 136, 0.16);
  --accent-softer: rgba(82, 183, 136, 0.08);
  --danger: #f97066;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.24);
  --shadow-md: 0 10px 28px rgba(0, 0, 0, 0.32);
  --theme-color: #121814;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  height: 100dvh;
  overflow: hidden;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.app {
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
  height: 100%;
  height: 100dvh;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 18px 14px;
  background: color-mix(in srgb, var(--bg-elevated) 92%, var(--accent-softer));
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-copy {
  flex: 1;
  min-width: 0;
}

.header-logo {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  object-fit: cover;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
}

.theme-toggle {
  appearance: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-muted);
  color: var(--text-secondary);
  display: grid;
  place-items: center;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.theme-toggle[data-follows-system='true']:hover,
.theme-toggle:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--border-strong);
}

.theme-icon {
  grid-area: 1 / 1;
}

[data-theme='light'] .theme-icon-sun,
[data-theme='dark'] .theme-icon-moon {
  display: none;
}

.header h1 {
  margin: 0 0 2px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header p {
  margin: 0;
  color: var(--text-secondary);
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.comments {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 14px 16px 12px;
}

.thread {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.thread-nested {
  margin-top: 6px;
  margin-left: 8px;
  padding-left: 10px;
  border-left: 2px solid var(--border-strong);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.comment {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  box-shadow: var(--shadow-sm);
  animation: fade-in 0.25s ease;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.comment-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.avatar {
  width: 34px;
  height: 34px;
  min-width: 34px;
  min-height: 34px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  background: var(--bg-muted);
  isolation: isolate;
}

.avatar-image {
  width: 100%;
  height: 100%;
  min-width: 100%;
  min-height: 100%;
  object-fit: cover;
  object-position: center center;
  border-radius: 50%;
  display: block;
}

.comment-meta {
  min-width: 0;
}

.comment-author {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
}

.comment-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 1px;
}

.comment-text {
  white-space: pre-wrap;
  line-height: 1.5;
  font-size: 15px;
  word-break: break-word;
}

.comment-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: nowrap;
  min-width: 0;
}

.comment-actions--no-reply .reactions {
  margin-left: 0;
}

.reply-btn {
  flex-shrink: 0;
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--bg-muted);
  color: var(--accent);
  border-radius: var(--radius-pill);
  padding: 6px 12px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.reply-btn:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
}

.reply-btn:active {
  transform: scale(0.98);
}

.reactions {
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.reactions::-webkit-scrollbar {
  display: none;
}

.reaction-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  border-radius: var(--radius-pill);
  min-width: 32px;
  height: 30px;
  padding: 0 6px;
  flex-shrink: 0;
  font: inherit;
  font-size: 15px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.reaction-btn:hover {
  background: var(--accent-softer);
}

.reaction-btn.active {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 40%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 12%, transparent);
}

.reaction-count {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.compose-shell {
  flex-shrink: 0;
  z-index: 20;
  width: 100%;
  padding-bottom: calc(var(--safe-bottom) + var(--keyboard-offset));
  background: color-mix(in srgb, var(--bg-elevated) 94%, transparent);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(16px);
  box-shadow: 0 -8px 24px rgba(26, 46, 31, 0.06);
}

.reply-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px 0;
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}

.reply-banner.hidden {
  display: none;
}

.icon-btn {
  appearance: none;
  border: 0;
  background: var(--accent-soft);
  color: var(--accent);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
}

.compose {
  padding: 8px 12px 4px;
}

.compose-field {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 6px 6px 12px;
  background: var(--bg-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.compose-field:focus-within {
  border-color: color-mix(in srgb, var(--accent) 45%, transparent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.compose textarea {
  flex: 1;
  width: 100%;
  min-height: 22px;
  max-height: 96px;
  resize: none;
  border: 0;
  background: transparent;
  padding: 8px 0;
  font: inherit;
  font-size: 16px;
  line-height: 1.35;
  color: var(--text);
  overflow: hidden;
}

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

.compose textarea:focus {
  outline: none;
}

.send-btn {
  appearance: none;
  border: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--accent), var(--accent-hover));
  color: #fff;
  cursor: pointer;
  flex-shrink: 0;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 35%, transparent);
  transition: transform 0.12s ease, opacity 0.12s ease;
}

.send-btn:hover {
  transform: translateY(-1px);
}

.send-btn:active {
  transform: scale(0.96);
}

.send-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.status {
  margin: 0;
  padding: 0 12px 6px;
  font-size: 13px;
  color: var(--text-muted);
}

.status:empty {
  display: none;
}

.status.is-error {
  color: var(--danger);
}

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-align: center;
  padding: 48px 24px;
  color: var(--text-secondary);
}

.empty-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  background: var(--accent-soft);
  font-size: 28px;
}

.empty-title {
  margin: 4px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.empty-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.45;
  max-width: 260px;
}