/* tweet seminar — dark theme */

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

:root {
  --bg: #0a0a0a;
  --card-bg: #141414;
  --card-border: #222;
  --accent: #1d9bf0;
  --cta: #c4704b;
  --cta-hover: #d4805b;
  --text: #e8e8e8;
  --text-secondary: #888;
  --text-muted: #555;
  --font-ui: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --font-content: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --max-w: 600px;
  --transition: 0.25s ease;
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Progress bar */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--accent);
  transition: width 0.4s ease;
  z-index: 100;
  width: 0%;
}

/* Views */
.view {
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- HOME VIEW ---------- */

.home-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 10vh 1.5rem 2rem;
  text-align: center;
}

.home-title {
  font-family: var(--font-ui);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.home-sub {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.seminars-list {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: left;
}

.seminar-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: border-color var(--transition), background var(--transition);
}

.seminar-card:hover {
  border-color: var(--accent);
  background: #1a1a1a;
}

.seminar-card-name {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}

.seminar-card-meta {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.seminar-card-cta {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--accent);
  white-space: nowrap;
}

.empty-home-msg {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 2rem 0;
}

/* ---------- CREATE / SETUP VIEW ---------- */

.setup-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 8vh 1.5rem 2rem;
  text-align: center;
}

.setup-title {
  font-family: var(--font-ui);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.setup-sub {
  font-family: var(--font-ui);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 420px;
  margin-left: auto;
  margin-right: auto;
}

.text-input {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  padding: 0.85rem 1rem;
  outline: none;
  transition: border-color var(--transition);
  margin-bottom: 1rem;
}

.text-input:focus {
  border-color: var(--accent);
}

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

#handles-input {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  padding: 1rem;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition);
}

#handles-input:focus {
  border-color: var(--accent);
}

#handles-input::placeholder {
  color: var(--text-muted);
}

.btn-primary {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 2.5rem;
  background: var(--cta);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform 0.1s;
  text-decoration: none;
}

.btn-primary:hover {
  background: var(--cta-hover);
}

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

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.error-msg {
  color: #e85454;
  font-size: 0.8rem;
  margin-top: 1rem;
  min-height: 1.2em;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--text-muted);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- SEMINAR VIEW ---------- */

.seminar-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 6rem;
}

.seminar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.seminar-name-heading {
  font-family: var(--font-ui);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1.5rem;
}

.back-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--text);
}

.position-text {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Tweet Card */
.tweet-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: opacity var(--transition), transform var(--transition);
}

.tweet-card.fading {
  opacity: 0;
  transform: translateY(8px);
}

.tweet-author-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.tweet-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--card-border);
  overflow: hidden;
  flex-shrink: 0;
}

.tweet-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tweet-author-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.tweet-name {
  font-family: var(--font-content);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.tweet-handle {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.tweet-text {
  font-family: var(--font-content);
  font-size: 1.2rem;
  line-height: 1.55;
  color: #fff;
  margin-bottom: 1rem;
  word-break: break-word;
  white-space: pre-wrap;
}

.tweet-media {
  margin-bottom: 1rem;
}

.tweet-media img {
  max-width: 100%;
  border-radius: 8px;
  border: 1px solid var(--card-border);
}

.tweet-stats {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--card-border);
  border-bottom: 1px solid var(--card-border);
}

.stat {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-family: var(--font-ui);
  font-size: 0.8rem;
}

.stat svg {
  opacity: 0.6;
}

.stat-count {
  color: var(--text-secondary);
}

.tweet-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
}

.relevance-badge {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(29, 155, 240, 0.1);
  border: 1px solid rgba(29, 155, 240, 0.2);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
}

.tweet-time {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.tweet-link {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition);
}

.tweet-link:hover {
  opacity: 0.8;
}

/* Empty / Done states */
.empty-state,
.done-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.done-state .btn-secondary {
  margin-top: 1.5rem;
}

/* ---------- DISCUSSION ---------- */

.discussion {
  margin-top: 2rem;
}

.discuss-prompt {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 1rem;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.comment-form input,
.comment-form textarea {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.85rem;
  padding: 0.65rem 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

.comment-form input:focus,
.comment-form textarea:focus {
  border-color: var(--accent);
}

.comment-form input::placeholder,
.comment-form textarea::placeholder {
  color: var(--text-muted);
}

.btn-secondary {
  display: inline-block;
  padding: 0.6rem 1.5rem;
  background: transparent;
  color: var(--cta);
  border: 1px solid var(--cta);
  border-radius: 6px;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  align-self: flex-start;
}

.btn-secondary:hover {
  background: var(--cta);
  color: #fff;
}

.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.comment-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--card-border);
}

.comment-item:last-child {
  border-bottom: none;
}

.comment-author {
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text);
  margin-right: 0.5rem;
}

.comment-time {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  color: var(--text-muted);
}

.comment-body {
  font-family: var(--font-content);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 0.3rem;
}

/* ---------- NAVIGATION ---------- */

.nav-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  background: linear-gradient(transparent, var(--bg) 30%);
  z-index: 50;
}

.nav-btn {
  padding: 0.7rem 2rem;
  background: var(--card-bg);
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  min-width: 130px;
}

.nav-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: #1a1a1a;
}

.nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ---------- RESPONSIVE ---------- */

@media (max-width: 480px) {
  .home-container,
  .setup-container {
    padding-top: 6vh;
  }

  .home-title,
  .setup-title {
    font-size: 1.5rem;
  }

  .tweet-text {
    font-size: 1.05rem;
  }

  .tweet-stats {
    gap: 1rem;
  }

  .nav-btn {
    padding: 0.7rem 1.2rem;
    min-width: 100px;
    font-size: 0.8rem;
  }

  .seminar-card {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .seminar-card-meta {
    order: 3;
    width: 100%;
  }
}