:root {
  --bg: #f1f5f9;
  --panel: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --muted: #64748b;
  --brand: #0078d7;
  --brand-dark: #005bb5;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
}

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

body {
  font-family: system-ui, -apple-system, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ---- Login Screen ---- */
.login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 28px;
  text-align: center;
  max-width: 380px;
  width: 100%;
}

@media (max-width: 480px) {
  .login-card { padding: 32px 20px; }
  .login-title { font-size: 1.3rem; }
}

.login-icon { font-size: 48px; margin-bottom: 16px; }

.login-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.login-desc {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-bottom: 28px;
}


.or-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  font-size: 0.8rem;
  margin: 20px 0 16px;
}

.or-divider::before,
.or-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.room-entry {
  display: flex;
  gap: 8px;
}

.room-input {
  flex: 1;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 0.9rem;
  font-family: 'Courier New', monospace;
  letter-spacing: 1px;
  outline: none;
  transition: border-color 0.15s;
  color: var(--text);
}

.room-input:focus { border-color: var(--brand); }

.room-btn {
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  white-space: nowrap;
}

.room-btn:hover { background: var(--brand-dark); }

.main-room-section {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 12px 16px;
}

.room-hint {
  font-size: 0.76rem;
  color: var(--muted);
  margin-top: 8px;
  line-height: 1.5;
  text-align: left;
}

.qr-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 7px;
  font-size: 0.72rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--muted);
  letter-spacing: 0.5px;
  transition: background 0.15s, border-color 0.15s;
}

.qr-btn:hover {
  background: var(--bg);
  border-color: #aaa;
  color: var(--text);
}

.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
}

.qr-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.5);
}

.qr-card {
  position: relative;
  background: #fff;
  border-radius: 16px;
  padding: 28px 28px 24px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 280px;
  width: 90%;
}

.qr-card-title {
  font-size: 0.88rem;
  color: var(--muted);
  font-weight: 500;
}

#qr-container {
  border-radius: 8px;
  border: 1px solid var(--border);
  line-height: 0; /* removes gap under the img qrcodejs injects */
}

.qr-card-url {
  font-size: 0.68rem;
  font-family: 'Courier New', monospace;
  color: var(--muted);
  word-break: break-all;
  line-height: 1.5;
}

.qr-close-btn {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 24px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--text);
  transition: background 0.15s;
  width: 100%;
}

.qr-close-btn:hover { background: #e2e8f0; }

.leave-room-btn {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 2px 5px;
  border-radius: 4px;
  margin-left: -6px;
  line-height: 1;
  transition: color 0.15s, background 0.15s;
}

.leave-room-btn:hover {
  color: var(--danger);
  background: #fef2f2;
}

.clip-source {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
  align-self: flex-start;
}

.clip-source-user {
  background: #eff6ff;
  color: var(--brand);
}

.clip-source-room {
  background: #f0fdf4;
  color: #16a34a;
}

.room-switch-confirm {
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 5px;
  padding: 3px 8px;
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  margin-left: 2px;
  transition: background 0.15s;
}

.room-switch-confirm:hover { background: var(--brand-dark); }

.room-switch-input {
  font-size: 0.8rem;
  font-family: 'Courier New', monospace;
  border: 1.5px solid var(--brand);
  border-radius: 6px;
  padding: 3px 8px;
  outline: none;
  width: 140px;
  max-width: 45vw;
  background: #eff6ff;
  color: var(--brand);
}

.room-label {
  cursor: pointer;
  font-size: 0.8rem;
  font-family: 'Courier New', monospace;
  background: #eff6ff;
  color: var(--brand);
  border: 1px solid #bfdbfe;
  border-radius: 6px;
  padding: 3px 8px;
  font-weight: 600;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: opacity 0.15s;
}

.room-label:hover { opacity: 0.75; }

/* ---- Room bar (below page-header) ---- */
.room-bar {
  position: sticky;
  top: 52px;
  z-index: 99;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 6px 16px;
  min-height: 0;
}

.room-bar:has(.room-controls > :not([style*="display:none"])) {
  display: block;
}

.room-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* ---- Content ---- */
.content-wrap {
  max-width: 640px;
  margin: 0 auto;
  padding: 24px 16px 80px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ---- Post Area ---- */
.post-area {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.post-target-row {
  display: flex;
  gap: 0;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 3px;
  align-self: flex-start;
}

.target-btn {
  flex: 1;
  border: none;
  background: none;
  border-radius: 6px;
  padding: 5px 14px;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--muted);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.target-btn.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  font-weight: 600;
}

textarea {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: none;
  overflow: hidden;
  min-height: 96px;
  outline: none;
  transition: border-color 0.15s;
  color: var(--text);
}

.shortcut-hint {
  font-size: 0.72rem;
  color: var(--muted);
  text-align: right;
  margin-top: -4px;
}

textarea:focus { border-color: var(--brand); }

.post-btn {
  align-self: flex-end;
  background: var(--brand);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 22px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.post-btn:hover { background: var(--brand-dark); }
.post-btn:disabled { background: #94a3b8; cursor: not-allowed; }

/* ---- Clips List ---- */
.clips-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.empty-msg {
  text-align: center;
  color: var(--muted);
  padding: 32px 0;
  font-size: 0.9rem;
}

/* ---- Clip Item ---- */
.clip-item {
  background: var(--panel);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  animation: slide-in 0.2s ease;
}

@keyframes slide-in {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.clip-text {
  font-size: 0.95rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-all;
}

.link-preview {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 10px;
  text-decoration: none;
  color: var(--text);
  transition: background 0.15s, border-color 0.15s;
  overflow: hidden;
  margin-top: 6px;
}

.link-preview:hover {
  background: #eff6ff;
  border-color: var(--brand);
}

.link-favicon {
  flex-shrink: 0;
  border-radius: 2px;
}

.link-domain {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--brand);
  white-space: nowrap;
  flex-shrink: 0;
}

.link-url {
  font-size: 0.72rem;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.clip-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.clip-timer {
  font-size: 0.78rem;
  color: var(--muted);
}

.clip-timer.urgent { color: var(--danger); font-weight: 600; }

.clip-actions {
  display: flex;
  gap: 6px;
}

.copy-btn, .delete-btn {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.78rem;
  cursor: pointer;
  background: none;
  transition: background 0.15s;
}

.copy-btn { color: var(--brand); }
.copy-btn:hover { background: #eff6ff; }

.extend-btn { color: #0891b2; }
.extend-btn:hover { background: #ecfeff; }
.extend-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.delete-btn { color: var(--danger); }
.delete-btn:hover { background: #fef2f2; }