:root {
  --bg: #1a1a2e;
  --bg-surface: #16213e;
  --bg-card: #1f2b47;
  --bg-input: #253352;
  --text: #e0e0e0;
  --text-muted: #8892a4;
  --accent: #4a9eff;
  --accent-hover: #3a8eef;
  --danger: #e74c3c;
  --danger-hover: #c0392b;
  --border: #2a3a5c;
  --radius: 8px;
}

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

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

/* --- Auth Page --- */

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

.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 100%;
  max-width: 380px;
}

.auth-card h1 {
  text-align: center;
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 0.25rem;
}

.subtitle {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.5rem;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
}

.tab {
  flex: 1;
  padding: 0.6rem;
  border: none;
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.9rem;
  transition: all 0.2s;
}

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

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

.form-group label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.form-group input {
  width: 100%;
  padding: 0.65rem 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

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

.error-msg {
  color: var(--danger);
  font-size: 0.85rem;
  min-height: 1.2rem;
  margin-bottom: 0.5rem;
}

#auth-form button[type="submit"] {
  width: 100%;
  padding: 0.7rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

#auth-form button[type="submit"]:hover {
  background: var(--accent-hover);
}

#auth-form button[type="submit"]:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* --- App Page --- */

.app-page {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

header h1 {
  font-size: 1.2rem;
  color: var(--accent);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

#username-display {
  color: var(--text-muted);
  font-size: 0.85rem;
}

#logout-btn {
  padding: 0.35rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.2s;
}

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

#mute-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.3rem 0.5rem;
  display: flex;
  align-items: center;
  transition: all 0.2s;
}

#mute-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

#clear-all-btn {
  padding: 0.35rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.2s;
}

#clear-all-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* Clip Feed */

#clip-feed {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

#load-more-wrapper {
  text-align: center;
}

#load-more-btn {
  padding: 0.4rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8rem;
}

#load-more-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Clip */

.clip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  max-width: 85%;
  animation: fadeIn 0.2s ease;
}

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

.clip-content pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text);
}

.clip-content {
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.15s;
}

.clip-content:hover {
  background: rgba(74, 158, 255, 0.05);
}

.clip-content img {
  max-width: 100%;
  max-height: 400px;
  border-radius: 4px;
  display: block;
}

.clip-file {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0;
  color: var(--text);
}

.clip-file svg {
  flex-shrink: 0;
  color: var(--accent);
}

.file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.9rem;
}

.clip-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
}

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

.clip-actions {
  display: flex;
  gap: 0.35rem;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 4px;
  display: flex;
  align-items: center;
  transition: all 0.2s;
}

.btn-icon:hover {
  color: var(--accent);
  background: rgba(74, 158, 255, 0.1);
}

.btn-delete:hover {
  color: var(--danger);
  background: rgba(231, 76, 60, 0.1);
}

/* Image Preview */

#image-preview {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 100;
  padding: 1rem;
}

#preview-img {
  max-width: 90%;
  max-height: 60vh;
  border-radius: var(--radius);
}

.preview-actions {
  display: flex;
  gap: 0.75rem;
}

.preview-actions button {
  padding: 0.6rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.95rem;
  transition: background 0.2s;
}

#preview-send {
  background: var(--accent);
  color: #fff;
}

#preview-send:hover {
  background: var(--accent-hover);
}

#preview-cancel {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

#preview-cancel:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* Input Area */

.input-section {
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.input-area {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
  max-width: 900px;
  margin: 0 auto;
}

#clip-input {
  flex: 1;
  padding: 0.65rem 0.75rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  resize: none;
  outline: none;
  line-height: 1.4;
  transition: border-color 0.2s;
}

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

#send-btn {
  padding: 0.65rem;
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
  flex-shrink: 0;
}

#send-btn:hover {
  background: var(--accent-hover);
}

/* Toast */

.toast {
  position: fixed;
  top: 120px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.85rem;
  z-index: 200;
  animation: toastIn 0.2s ease;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Scrollbar */

#clip-feed::-webkit-scrollbar {
  width: 6px;
}

#clip-feed::-webkit-scrollbar-track {
  background: transparent;
}

#clip-feed::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* Drop Overlay */

#drop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 26, 46, 0.9);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 150;
  pointer-events: none;
}

#drop-overlay.active {
  display: flex;
}

.drop-overlay-content {
  text-align: center;
  color: var(--accent);
}

.drop-overlay-content svg {
  margin-bottom: 0.75rem;
}

.drop-overlay-content p {
  font-size: 1.2rem;
  font-weight: 500;
}

/* Syntax Highlighting overrides */

.clip-content pre code.hljs {
  background: transparent;
  padding: 0;
}

.clip-content pre code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Responsive */

@media (max-width: 600px) {
  .clip {
    max-width: 95%;
  }

  header {
    padding: 0.5rem 0.75rem;
  }

  #clip-feed {
    padding: 0.75rem;
  }
}