/* ================================
   Forum — Clean CSS
   ================================ */

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

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2a2d3a;
  --accent: #6c5ce7;
  --accent-hover: #5a4bd1;
  --text: #e0e0e0;
  --text-muted: #888;
  --danger: #e74c3c;
  --success: #2ecc71;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* Auth */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 400px;
}

.auth-box h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--accent);
}

#auth-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tab {
  flex: 1;
  padding: 0.6rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}

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

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

input[type="text"],
input[type="password"],
input[type="email"],
textarea {
  width: 100%;
  padding: 0.7rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

input:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.btn-primary {
  width: 100%;
  padding: 0.75rem;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

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

.error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 0.75rem;
  text-align: center;
}

.hidden { display: none !important; }

/* Forum Layout */
.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header h2 {
  font-size: 1.2rem;
  color: var(--accent);
}

.user-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.user-menu span { color: var(--text-muted); font-size: 0.9rem; }

.btn-logout {
  padding: 0.4rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}

.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* Topic List */
.forum-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.forum-header h1 { font-size: 1.5rem; }

.btn-new {
  padding: 0.6rem 1.2rem;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

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

.topic-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.topic-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.1s;
}

.topic-card:hover {
  border-color: var(--accent);
  transform: translateX(4px);
}

.topic-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

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

.topic-card.locked { opacity: 0.6; cursor: default; }
.topic-card.locked:hover { transform: none; border-color: var(--border); }

/* Replies */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 1rem;
  cursor: pointer;
}

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

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

.reply-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
}

.reply-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.reply-author { color: var(--accent); font-weight: 600; }

.reply-body { font-size: 0.95rem; white-space: pre-wrap; }

/* New Topic / Reply Form */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  width: 100%;
  max-width: 600px;
}

.modal h3 { margin-bottom: 1rem; }

.modal .form-group:last-of-type { margin-bottom: 1rem; }

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.btn-cancel {
  padding: 0.6rem 1.2rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-cancel:hover { border-color: var(--text-muted); }

/* Empty state */
.empty {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 600px) {
  .header { flex-direction: column; gap: 0.5rem; }
  .topic-card:hover { transform: none; }
}