:root {
  --bg-primary: #212121;
  --bg-secondary: #171717;
  --bg-tertiary: #2a2a2a;
  --bg-input: #2F2F2F;
  --bg-user-msg: #0091ff;
  --bg-ai-msg: #2a2a2a;
  --text-primary: #ececec;
  --text-secondary: #9e9e9e;
  --text-muted: #6b6b6b;
  --text-white: #ffffff;
  --accent: #0091ff;
  --accent-hover: #007be6;
  --accent-glow: rgba(0, 145, 255, 0.25);
  --border: #383838;
  --border-light: #454545;
  --danger: #ff4444;
  --success: #00c853;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --sidebar-width: 260px;
}

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

html, body, #app {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
}

#app { display: flex; }

/* ═══ Sidebar ═══ */
#sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  padding: 8px 0;
  border-right: 1px solid var(--border);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 50;
}

#sidebar.collapsed {
  transform: translateX(calc(-1 * var(--sidebar-width)));
  border-right-color: transparent;
}

.sidebar-btn {
  margin: 0 8px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.15s ease;
}

.sidebar-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.sidebar-btn:active {
  transform: translateY(0);
}

.new-chat { margin-top: 12px; }

.sidebar-section {
  flex: 1;
  overflow-y: auto;
  margin-top: 12px;
}

.sidebar-conversation {
  margin: 0 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.15s ease;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid transparent;
}

.sidebar-conversation:hover {
  background: var(--bg-tertiary);
  border-color: var(--border);
}

.sidebar-conversation.active {
  background: var(--bg-input);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-glow);
}

.sidebar-conversation .conv-title {
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.sidebar-conversation .delete-conv {
  opacity: 0;
  color: var(--danger);
  font-size: 16px;
  margin-left: 8px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 2px 6px;
  border-radius: 4px;
  transition: all 0.15s;
  line-height: 1;
}

.sidebar-conversation:hover .delete-conv {
  opacity: 1;
}

.sidebar-conversation .delete-conv:hover {
  background: rgba(255, 68, 68, 0.15);
}

.sidebar-btn.settings {
  margin: 12px 8px 8px;
}

/* ═══ Main ═══ */
#main {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

#topbar {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
  background: var(--bg-secondary);
}

#sidebar-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
}

#sidebar-toggle:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-light);
  transform: scale(1.05);
}

#model-select {
  flex: 1;
  padding: 8px 14px;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239e9e9e' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

#model-select:hover {
  border-color: var(--border-light);
}

#model-select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* ═══ Chat Container ═══ */
#chat-container {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0;
  scroll-behavior: smooth;
}

/* ═══ Messages ═══ */
#messages {
  max-width: 780px;
  margin: 0 auto;
  padding: 20px 24px 100px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.message {
  padding: 14px 18px;
  font-size: 15px;
  line-height: 1.65;
  animation: messageIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.message.user {
  align-self: flex-end;
  background: var(--bg-user-msg);
  color: var(--text-white);
  text-align: right;
  border-radius: var(--radius-lg);
  border-bottom-right-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 145, 255, 0.2);
  max-width: 75%;
  display: inline-block;
}

.message.user .message-content {
  font-weight: 600;
  display: inline-block;
  max-width: 100%;
  word-break: break-word;
  min-width: 40px;
}

.message.assistant {
  background: transparent;
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: 4px;
}

.message.assistant .message-content {
  font-weight: 500;
  max-width: 100%;
}

.message.assistant .message-content p {
  margin: 0.6em 0;
}

.message.assistant .message-content p:first-child {
  margin-top: 0;
}

.message.assistant .message-content p:last-child {
  margin-bottom: 0;
}

.message.assistant .message-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 10px 0;
  font-size: 13px;
  line-height: 1.5;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

.message.assistant .message-content code {
  font-family: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', Consolas, monospace;
  font-size: 13px;
  letter-spacing: -0.2px;
}

.message.assistant .message-content :not(pre) > code {
  background: var(--bg-input);
  padding: 2px 7px;
  border-radius: 5px;
  border: 1px solid var(--border);
}

.message.assistant .message-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 14px;
  color: var(--text-secondary);
  margin: 10px 0;
  font-style: italic;
}

.message.assistant .message-content ul,
.message.assistant .message-content ol {
  margin: 8px 0;
  padding-left: 24px;
}

.message.assistant .message-content li {
  margin: 4px 0;
}

/* ═══ Welcome Screen ═══ */
.welcome-screen {
  text-align: center;
  padding: 80px 24px 40px;
  animation: fadeIn 0.4s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.welcome-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-subtitle {
  color: var(--text-secondary);
  font-size: 16px;
  margin-bottom: 40px;
}

.suggestion-chips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  max-width: 640px;
  margin: 0 auto;
}

.suggestion-chip {
  padding: 14px 18px;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 14px;
  text-align: left;
  transition: all 0.2s ease;
}

.suggestion-chip:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--accent-glow);
}

.suggestion-chip:active {
  transform: translateY(0);
}

.hidden { display: none !important; }

/* ═══ Ollama Banner ═══ */
.ollama-banner {
  text-align: center;
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 12px 16px;
  font-size: 13px;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid rgba(255, 193, 7, 0.2);
}

.ollama-banner button {
  background: none;
  border: 1px solid var(--warning-text);
  color: var(--warning-text);
  padding: 5px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}

.ollama-banner button:hover {
  background: rgba(255, 193, 7, 0.15);
}

/* ═══ Input Area ═══ */
#input-area {
  padding: 8px 0 16px;
}

.input-progress {
  text-align: center;
  padding: 6px 0;
  font-size: 12px;
  color: var(--text-muted);
  transition: all 0.3s ease;
}

.input-progress-text {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  animation: pulseText 1.5s ease-in-out infinite;
}

@keyframes pulseText {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.input-progress .dots {
  display: inline-block;
}

.input-progress .dots span {
  animation: dotBounce 1.4s ease-in-out infinite;
}

.input-progress .dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.input-progress .dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes dotBounce {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

#input-area .input-wrapper {
  display: flex;
  align-items: flex-end;
  max-width: 780px;
  margin: 0 auto;
  padding: 4px 10px;
  gap: 8px;
}

#message-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-family: inherit;
  resize: none;
  outline: none;
  max-height: 200px;
  line-height: 1.5;
  transition: all 0.2s ease;
}

#message-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

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

#send-btn {
  background: var(--accent);
  border: none;
  color: var(--text-white);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

#send-btn:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: scale(1.05);
  box-shadow: 0 4px 12px var(--accent-glow);
}

#send-btn:active:not(:disabled) {
  transform: scale(0.95);
}

#send-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
}

/* ═══ Streaming Indicator ═══ */
.streaming-indicator {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--text-white);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  z-index: 10;
  animation: slideDown 0.3s ease;
  display: flex;
  align-items: center;
  gap: 6px;
}

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

.streaming-dots span {
  display: inline-block;
  animation: streamDot 1.4s infinite;
  animation-fill-mode: both;
}

.streaming-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.streaming-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

.streaming-estimate {
  margin-left: 6px;
  font-weight: 400;
  opacity: 0.85;
}

@keyframes streamDot {
  0%, 80%, 100% { opacity: 0.3; }
  40% { opacity: 1; }
}

/* ═══ Response Stats ═══ */
.response-stats {
  position: absolute;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--text-secondary);
  box-shadow: var(--shadow-md);
  z-index: 10;
  animation: fadeIn 0.3s ease;
  white-space: nowrap;
}

.response-stat {
  display: flex;
  align-items: center;
  gap: 4px;
}

.response-stat.hidden {
  display: none !important;
}

.response-stat .stat-estimate {
  color: var(--accent);
  font-weight: 500;
}

/* ═══ Settings Panel ═══ */
.panel-overlay {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 100;
  justify-content: flex-end;
  animation: overlayIn 0.2s ease;
}

@keyframes overlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.panel-overlay.hidden {
  display: none;
}

.panel-content {
  width: 420px;
  max-width: 90vw;
  height: 100%;
  background: var(--bg-secondary);
  padding: 28px;
  overflow-y: auto;
  position: relative;
  border-left: 1px solid var(--border);
  animation: panelSlide 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes panelSlide {
  from { transform: translateX(100%); }
  to   { transform: translateX(0); }
}

.panel-content h2 {
  margin-bottom: 24px;
  font-size: 20px;
  font-weight: 600;
}

.panel-content h3 {
  margin-top: 28px;
  margin-bottom: 14px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.setting-label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 18px;
  font-size: 14px;
  color: var(--text-secondary);
}

.setting-label textarea,
.setting-label input[type="number"],
#model-name-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: all 0.15s;
}

.setting-label textarea:focus,
.setting-label input[type="number"]:focus,
#model-name-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.setting-label input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.setting-value {
  color: var(--accent);
  font-weight: 500;
  font-size: 14px;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin-top: 4px;
  font-size: 14px;
}

.toggle-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 18px;
  height: 18px;
  cursor: pointer;
}

.toggle-label .toggle-text {
  cursor: pointer;
  user-select: none;
}

.panel-content #close-settings {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 26px;
  cursor: pointer;
  transition: all 0.15s;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.panel-content #close-settings:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

#pull-model-btn {
  padding: 10px 20px;
  background: var(--accent);
  color: var(--text-white);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 14px;
  transition: all 0.15s;
  margin-top: 8px;
}

#pull-model-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

#pull-progress {
  display: none;
  margin-top: 10px;
}

#pull-progress.active {
  display: block;
}

#pull-progress .progress-bar {
  width: 100%;
  height: 6px;
  background: var(--bg-input);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 8px;
}

#pull-progress .progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.3s ease;
  border-radius: 3px;
}

#pull-progress .pull-status {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ═══ Scrollbar ═══ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ═══ Responsive ═══ */
@media (max-width: 600px) {
  #sidebar {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 200;
    height: 100%;
    transform: translateX(calc(-1 * var(--sidebar-width)));
    box-shadow: var(--shadow-lg);
  }

  #sidebar.mobile-open {
    transform: translateX(0);
  }

  .panel-content {
    width: 100%;
  }

  .welcome-title {
    font-size: 24px;
  }

  .suggestion-chips {
    grid-template-columns: 1fr;
  }

  .response-stats {
    display: none;
  }
}

/* ═══ Model Select Dropdown ═══ */
.model-select-wrapper {
  position: relative;
  flex: 1;
  min-width: 180px;
}

.model-select-trigger {
  display: flex;
  align-items: center;
  padding: 8px 14px;
  background: linear-gradient(135deg, var(--bg-input) 0%, var(--bg-tertiary) 100%);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  letter-spacing: 0.2px;
  flex: 1;
  min-width: 0;
  gap: 6px;
}

.model-select-trigger .model-select-label-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.model-select-trigger:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-input) 100%);
  box-shadow: 0 0 0 2px var(--accent-glow);
}

.model-select-trigger.open {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-input) 100%);
}

.model-select-chevron {
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  margin-left: 8px;
  color: var(--accent);
}

.model-select-trigger.open .model-select-chevron {
  transform: rotate(180deg);
}

.model-select-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--accent);
  border-top: none;
  border-bottom-left-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--accent-glow);
  z-index: 60;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
  opacity: 0;
}

.model-select-dropdown.open {
  max-height: 320px;
  overflow-y: auto;
  opacity: 1;
}

.model-select-list {
  padding: 6px 0;
}

.model-select-option {
  padding: 10px 16px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 450;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.15s ease;
  border-left: 3px solid transparent;
  margin: 2px 4px;
  border-radius: 4px;
  letter-spacing: 0.1px;
}

.model-select-option:hover {
  background: rgba(0, 145, 255, 0.06);
  border-left-color: var(--accent);
  padding-left: 18px;
}

.model-select-option.selected {
  color: var(--accent);
  background: rgba(0, 145, 255, 0.1);
  border-left-color: var(--accent);
  font-weight: 600;
}

.model-select-option.selected::before {
  content: '\2713';
  font-size: 14px;
  flex-shrink: 0;
  color: var(--accent);
  font-weight: bold;
}

.model-select-option.loading {
  color: var(--text-muted);
  font-style: italic;
  cursor: default;
}

.model-select-option.loading:hover {
  background: transparent;
  border-left-color: transparent;
  padding-left: 16px;
}

.model-select-option.disconnected {
  color: var(--danger);
  cursor: default;
}

.model-select-option.disconnected:hover {
  background: transparent;
  border-left-color: transparent;
}

/* ═══ Reasoning Section ═══ */
.reasoning-wrapper {
  margin-top: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(0, 0, 0, 0.1);
}

.reasoning-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(0, 145, 255, 0.04);
  border: none;
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: 0.3px;
}

.reasoning-toggle:hover {
  background: rgba(0, 145, 255, 0.1);
  color: var(--text-primary);
}

.reasoning-body {
  padding: 14px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.7;
  overflow: hidden;
  border-top: 1px solid var(--border);
}

.reasoning-body p {
  margin: 0.5em 0;
}

.reasoning-body pre {
  background: rgba(0, 0, 0, 0.3);
  border-color: var(--border);
}

/* ═══ Image Upload ═══ */
.input-attach-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.input-attach-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-glow) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.input-attach-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.05);
  box-shadow: 0 0 12px var(--accent-glow);
}

.input-attach-btn:hover::before {
  opacity: 1;
}

.image-preview-container {
  max-width: 780px;
  margin: 0 auto 6px;
  padding: 0 10px;
  position: relative;
  display: inline-block;
  animation: previewIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.image-preview-container img {
  max-height: 160px;
  max-width: 320px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border);
  display: block;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  transition: border-color 0.2s ease;
}

.image-preview-container img:hover {
  border-color: var(--accent);
}

.image-clear-btn {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--danger) 0%, #cc0000 100%);
  color: white;
  border: 2px solid var(--bg-primary);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(255, 68, 68, 0.3);
  font-weight: bold;
}

.image-clear-btn:hover {
  transform: scale(1.2) rotate(90deg);
  box-shadow: 0 4px 12px rgba(255, 68, 68, 0.5);
}

.message.user .message-image {
  display: block;
  max-width: 220px;
  max-height: 220px;
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  object-fit: contain;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  border: 2px solid rgba(255, 255, 255, 0.1);
  transition: border-color 0.2s ease;
}

.message.user .message-image:hover {
  border-color: rgba(255, 255, 255, 0.2);
}