:root {
  --twitter-blue: #1da1f2;
  --twitter-blue-dark: #0d8ddb;
  --twitter-light-blue: #e8f5fd;
  --text-color: #14171a;
  --muted-text: #657786;
  --border-color: #e1e8ed;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  background-color: var(--white);
  color: var(--text-color);
}

.site-header {
  background-color: var(--twitter-blue);
  color: var(--white);
  padding: 24px 16px;
  text-align: center;
}

.site-header h1 {
  margin: 0;
  font-size: 1.8rem;
}

.site-header h1 a {
  color: inherit;
  text-decoration: none;
}

.tagline {
  margin: 8px 0 0;
  font-size: 0.95rem;
  opacity: 0.9;
}

.site-nav {
  margin-top: 12px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.site-nav a {
  color: var(--white);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: bold;
  opacity: 0.9;
}

.site-nav a:hover {
  text-decoration: underline;
  opacity: 1;
}

.content-page h2 {
  margin-top: 0;
  color: var(--twitter-blue);
}

.content-page h3 {
  margin-bottom: 8px;
}

.content-intro {
  color: var(--muted-text);
}

.guideline-list,
.howto-steps {
  padding-left: 20px;
}

.guideline-list li,
.howto-steps li {
  margin-bottom: 6px;
}

.guideline-list.do li::marker {
  content: "✓ ";
  color: var(--twitter-blue);
}

.guideline-list.dont li::marker {
  content: "✕ ";
  color: #e0245e;
}

main {
  max-width: 600px;
  margin: 0 auto;
  padding: 24px 16px;
}

.topics {
  margin-bottom: 12px;
}

.topics-label {
  display: block;
  color: var(--muted-text);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.topics-optional {
  font-style: italic;
  opacity: 0.8;
}

.topic-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.topic {
  cursor: pointer;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  background-color: var(--twitter-light-blue);
  color: var(--twitter-blue);
  padding: 4px 12px;
  font-size: 0.85rem;
  font-family: inherit;
}

.topic:hover {
  border-color: var(--twitter-blue);
}

.topic.selected {
  background-color: var(--twitter-blue);
  border-color: var(--twitter-blue);
  color: var(--white);
  font-weight: bold;
}

.rant-form textarea {
  width: 100%;
  min-height: 100px;
  padding: 12px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
}

.rant-form textarea:focus {
  outline: none;
  border-color: var(--twitter-blue);
}

/* Honeypot: keep it in the DOM and accessible to dumb bots, but off-screen
   and invisible to real users. Not display:none — some bots skip those. */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

.btn-primary:disabled {
  background-color: var(--border-color);
  border-color: var(--border-color);
  color: var(--muted-text);
  cursor: not-allowed;
}

.char-counter {
  color: var(--muted-text);
  font-size: 0.85rem;
}

.btn {
  cursor: pointer;
  border-radius: 999px;
  font-weight: bold;
  border: 1px solid var(--twitter-blue);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn-primary {
  background-color: var(--twitter-blue);
  color: var(--white);
  padding: 8px 20px;
  font-size: 1rem;
}

.btn-primary:hover {
  background-color: var(--twitter-blue-dark);
}

.rant-list {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.topic-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.topic-filter-label {
  color: var(--muted-text);
  font-size: 0.85rem;
  margin-right: 2px;
}

.filter-chip {
  border-radius: 999px;
  border: 1px solid var(--border-color);
  color: var(--twitter-blue);
  background-color: var(--white);
  padding: 3px 12px;
  font-size: 0.85rem;
  text-decoration: none;
}

.filter-chip:hover {
  border-color: var(--twitter-blue);
}

.filter-chip.active {
  background-color: var(--twitter-blue);
  border-color: var(--twitter-blue);
  color: var(--white);
  font-weight: bold;
}

.rant-card {
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  background-color: var(--white);
}

.rant-topic {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  background-color: var(--twitter-light-blue);
  color: var(--twitter-blue);
  font-size: 0.75rem;
  font-weight: bold;
  text-decoration: none;
}

.rant-topic:hover {
  text-decoration: underline;
}

.rant-message {
  margin: 0 0 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

.rant-actions {
  display: flex;
  gap: 12px;
}

.btn-reaction {
  background-color: var(--white);
  color: var(--twitter-blue);
  padding: 6px 14px;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-reaction:hover {
  background-color: var(--twitter-light-blue);
}

.btn-reaction.active {
  background-color: var(--twitter-blue);
  color: var(--white);
}

.btn-count {
  font-weight: bold;
}

.empty-state {
  text-align: center;
  color: var(--muted-text);
}

.site-footer {
  text-align: center;
  padding: 16px;
  color: var(--muted-text);
  font-size: 0.85rem;
}