/* Grok Studio - Chat + Image UI Refactor */

:root {
  --nav-height: 74px;
  --bg-page: #f2f6fb;
  --bg-page-strong: #e8eef8;
  --bg-surface: rgba(255, 255, 255, 0.78);
  --bg-surface-strong: rgba(255, 255, 255, 0.92);
  --bg-card: #ffffff;
  --bg-soft: #eef3f9;
  --border: rgba(15, 23, 42, 0.12);
  --border-strong: rgba(15, 23, 42, 0.2);
  --text-primary: #0f172a;
  --text-secondary: #3a4a63;
  --text-tertiary: #66758f;
  --accent: #0ea5e9;
  --accent-hover: #0284c7;
  --accent-soft: rgba(14, 165, 233, 0.15);
  --accent-soft-strong: rgba(14, 165, 233, 0.24);
  --danger: #ef4444;
  --success: #10b981;
  --shadow-sm: 0 8px 20px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 18px 42px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.18);
  --gradient-brand: linear-gradient(130deg, #0891b2 0%, #0ea5e9 42%, #f97316 100%);
  --gradient-warm: linear-gradient(135deg, #fb923c 0%, #ea580c 100%);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #0b1324;
    --bg-page-strong: #111b2f;
    --bg-surface: rgba(11, 19, 36, 0.78);
    --bg-surface-strong: rgba(15, 24, 44, 0.9);
    --bg-card: #121d33;
    --bg-soft: #1a2943;
    --border: rgba(148, 163, 184, 0.2);
    --border-strong: rgba(148, 163, 184, 0.34);
    --text-primary: #e2e8f0;
    --text-secondary: #c2d0e4;
    --text-tertiary: #90a2bc;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --accent-soft: rgba(56, 189, 248, 0.2);
    --accent-soft-strong: rgba(56, 189, 248, 0.28);
    --shadow-sm: 0 12px 26px rgba(2, 6, 23, 0.3);
    --shadow-md: 0 18px 44px rgba(2, 6, 23, 0.46);
    --shadow-lg: 0 26px 60px rgba(2, 6, 23, 0.55);
    --gradient-brand: linear-gradient(130deg, #06b6d4 0%, #38bdf8 46%, #fb923c 100%);
    --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #f97316 100%);
  }

  body {
    color-scheme: dark;
  }
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  font-family: 'Plus Jakarta Sans', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text-primary);
  background: radial-gradient(circle at 16% -12%, #bfe9ff 0%, transparent 45%),
    radial-gradient(circle at 88% 14%, #ffd6ad 0%, transparent 42%),
    linear-gradient(180deg, var(--bg-page) 0%, var(--bg-page-strong) 100%);
  line-height: 1.55;
  position: relative;
  overflow-x: hidden;
}

.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.glow {
  position: absolute;
  border-radius: 999px;
  filter: blur(30px);
  opacity: 0.45;
}

.glow-a {
  width: 360px;
  height: 360px;
  top: -140px;
  left: -80px;
  background: radial-gradient(circle at 30% 30%, #38bdf8 0%, transparent 72%);
}

.glow-b {
  width: 420px;
  height: 420px;
  right: -120px;
  top: 20%;
  background: radial-gradient(circle at 65% 35%, #fb923c 0%, transparent 70%);
}

.glow-c {
  width: 320px;
  height: 320px;
  left: 34%;
  bottom: -180px;
  background: radial-gradient(circle at 50% 50%, #22d3ee 0%, transparent 76%);
}

a,
button,
input,
select,
textarea {
  font-family: inherit;
}

button,
select,
input,
textarea {
  outline: none;
}

.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  height: var(--nav-height);
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto minmax(80px, 1fr);
  align-items: center;
  gap: 1rem;
  padding: 0 1.35rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-surface);
  backdrop-filter: blur(16px) saturate(140%);
  box-shadow: var(--shadow-sm);
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-right {
  justify-content: flex-end;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.72rem;
}

.brand-mark {
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 0.72rem;
  display: grid;
  place-items: center;
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 10px 22px rgba(14, 165, 233, 0.35);
  flex-shrink: 0;
}

.brand-title {
  font-size: 0.94rem;
  font-weight: 700;
  letter-spacing: 0.015em;
}

.brand-subtitle {
  font-size: 0.73rem;
  color: var(--text-tertiary);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-center {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.icon-btn {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.75rem;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 1rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-soft);
  color: var(--text-primary);
}

.icon-btn:focus-visible {
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.icon-btn.danger {
  color: #f97373;
}

.icon-btn.danger:hover {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

.tab-button {
  min-height: 2.5rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: all 0.22s ease;
}

.tab-button:hover {
  color: var(--text-primary);
}

.tab-button.active {
  background: var(--gradient-brand);
  color: #fff;
  box-shadow: 0 10px 26px rgba(14, 165, 233, 0.35);
}

.main-container {
  min-height: 100vh;
  min-height: 100dvh;
  padding-top: var(--nav-height);
}

.chat-container,
.image-container {
  max-width: 1550px;
  margin: 0 auto;
  padding: 1.2rem 1.4rem 1.8rem;
}

.panel-head {
  margin-bottom: 1.35rem;
}

.panel-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.11em;
  margin-bottom: 0.45rem;
}

.panel-title {
  font-size: clamp(1.05rem, 1.25vw, 1.35rem);
  font-weight: 750;
  margin-bottom: 0.35rem;
  letter-spacing: 0.01em;
}

.panel-subtitle {
  color: var(--text-tertiary);
  font-size: 0.88rem;
}

.chat-container {
  height: calc(100vh - var(--nav-height));
  height: calc(100dvh - var(--nav-height));
  display: grid;
  grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
  gap: 1rem;
}

.chat-header {
  border: 1px solid var(--border);
  background: var(--bg-surface-strong);
  border-radius: 1.2rem;
  padding: 1.15rem 1.1rem;
  box-shadow: var(--shadow-sm);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.chat-model-group {
  margin-bottom: 1rem;
}

.chat-side-tips {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px dashed var(--border);
}

.chat-side-tips li {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.chat-side-tips li i {
  font-size: 0.38rem;
  color: var(--accent);
}

.chat-main {
  border: 1px solid var(--border);
  background: var(--bg-surface-strong);
  border-radius: 1.2rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.messages-area {
  flex: 1;
  overflow-y: auto;
  padding: 1.35rem 1.4rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  min-height: 0;
}

.messages-area::-webkit-scrollbar,
.input-panel::-webkit-scrollbar,
.form-textarea::-webkit-scrollbar,
.chat-input::-webkit-scrollbar {
  width: 8px;
}

.messages-area::-webkit-scrollbar-track,
.input-panel::-webkit-scrollbar-track,
.form-textarea::-webkit-scrollbar-track,
.chat-input::-webkit-scrollbar-track {
  background: transparent;
}

.messages-area::-webkit-scrollbar-thumb,
.input-panel::-webkit-scrollbar-thumb,
.form-textarea::-webkit-scrollbar-thumb,
.chat-input::-webkit-scrollbar-thumb {
  background: var(--accent-soft-strong);
  border-radius: 999px;
}

.message {
  display: flex;
  align-items: flex-start;
  gap: 0.72rem;
  max-width: min(95%, 980px);
  animation: fade-up 0.22s ease both;
}

.message.user {
  align-self: flex-end;
  flex-direction: row-reverse;
  max-width: min(76%, 760px);
}

.message.assistant {
  align-self: flex-start;
  width: min(92%, 980px);
}

.message-avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 0.7rem;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  font-size: 0.9rem;
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.message.user .message-avatar {
  background: var(--gradient-warm);
}

.message.assistant .message-avatar {
  background: var(--gradient-brand);
}

.message-content {
  min-width: 0;
  flex: 1;
  padding: 0.85rem 1rem;
  border-radius: 0.9rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.message.user .message-content {
  border-color: rgba(249, 115, 22, 0.38);
  background: rgba(249, 115, 22, 0.1);
}

.message-loading .message-content {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-tertiary);
}

.message-content p,
.message-content ul,
.message-content ol,
.message-content blockquote {
  margin: 0.45rem 0;
}

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
  margin: 0.8rem 0 0.45rem;
  line-height: 1.35;
}

.message-content h1 {
  font-size: 1.24rem;
}

.message-content h2 {
  font-size: 1.14rem;
}

.message-content h3,
.message-content h4 {
  font-size: 1.02rem;
}

.message-content p:first-child,
.message-content ul:first-child,
.message-content ol:first-child,
.message-content blockquote:first-child {
  margin-top: 0;
}

.message-content p:last-child,
.message-content ul:last-child,
.message-content ol:last-child,
.message-content blockquote:last-child {
  margin-bottom: 0;
}

.message-content ul,
.message-content ol {
  padding-left: 1.2rem;
}

.message-content pre {
  margin: 0.6rem 0;
  padding: 0;
  border-radius: 0.72rem;
  background: #1e293b;
  overflow: hidden;
  border: 1px solid var(--border);
  position: relative;
}

.message-content pre code {
  display: block;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  background: transparent !important;
}

.message-content code {
  font-family: 'JetBrains Mono', 'SFMono-Regular', Menlo, monospace;
  font-size: 0.82rem;
  line-height: 1.6;
}

.message-content :not(pre) > code {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 0.38rem;
  padding: 0.1rem 0.3rem;
}

.code-block-wrapper {
  position: relative;
  margin: 0.6rem 0;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background: #0f172a;
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.code-block-lang {
  font-size: 0.72rem;
  color: #94a3b8;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.code-copy-btn {
  padding: 0.3rem 0.6rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 0.4rem;
  background: rgba(30, 41, 59, 0.8);
  color: #94a3b8;
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.code-copy-btn:hover {
  background: rgba(51, 65, 85, 0.9);
  border-color: rgba(148, 163, 184, 0.5);
  color: #e2e8f0;
}

.code-copy-btn.copied {
  background: rgba(16, 185, 129, 0.2);
  border-color: rgba(16, 185, 129, 0.5);
  color: #10b981;
}

.message-content table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  border-radius: 0.65rem;
  overflow: hidden;
  display: block;
  overflow-x: auto;
  margin: 0.7rem 0;
  background: var(--bg-card);
}

.message-content th,
.message-content td {
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0.62rem;
  text-align: left;
  vertical-align: top;
  font-size: 0.86rem;
  line-height: 1.45;
}

.message-content th {
  background: var(--bg-soft);
  font-weight: 700;
}

.message-content tr:last-child td {
  border-bottom: none;
}

.message-content a {
  color: var(--accent-hover);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.message-content hr {
  border: none;
  border-top: 1px dashed var(--border);
  margin: 0.75rem 0;
}

.message-content blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 0.75rem;
  color: var(--text-secondary);
}

.chat-input-area {
  border-top: 1px solid var(--border);
  padding: 0.95rem 1rem 0.85rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, var(--bg-surface-strong) 22%);
}

.chat-file-preview {
  margin-bottom: 0.75rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--bg-card);
}

.chat-file-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chat-file-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: 0.65rem;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}

.chat-file-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.chat-file-item-doc {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.5rem;
  text-align: center;
}

.chat-file-item-doc i {
  font-size: 1.5rem;
  color: var(--accent);
}

.chat-file-item-doc span {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  word-break: break-all;
  line-height: 1.2;
}

.chat-file-remove {
  position: absolute;
  top: -0.3rem;
  right: -0.3rem;
  width: 1.4rem;
  height: 1.4rem;
  border-radius: 50%;
  border: none;
  background: var(--danger);
  color: #fff;
  font-size: 0.7rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
  transition: all 0.2s ease;
}

.chat-file-remove:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.4);
}

.chat-input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--bg-card);
  padding: 0.55rem;
}

.chat-attach-btn {
  width: 2.4rem;
  height: 2.4rem;
  flex-shrink: 0;
  border-radius: 0.65rem;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text-secondary);
  font-size: 1rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.chat-attach-btn:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent);
}

.chat-input-wrapper > textarea {
  flex: 1;
}

.chat-input-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.chat-char-count {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  padding-left: 0.3rem;
}

.chat-input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-primary);
  min-height: 2.55rem;
  max-height: 11rem;
  resize: none;
  line-height: 1.55;
  padding: 0.42rem 0.55rem;
  font-size: 0.95rem;
}

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

.send-btn {
  min-width: 5.3rem;
  height: 2.55rem;
  border: none;
  border-radius: 0.72rem;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.42rem;
  cursor: pointer;
  transition: all 0.22s ease;
  box-shadow: 0 10px 20px rgba(14, 165, 233, 0.3);
}

.send-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(14, 165, 233, 0.35);
}

.send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.input-hint {
  margin-top: 0.52rem;
  font-size: 0.76rem;
  color: var(--text-tertiary);
  padding-left: 0.12rem;
}

.image-container {
  display: grid;
  grid-template-columns: minmax(310px, 380px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.input-panel,
.results-panel {
  border: 1px solid var(--border);
  background: var(--bg-surface-strong);
  border-radius: 1.2rem;
  box-shadow: var(--shadow-sm);
}

.input-panel {
  position: sticky;
  top: calc(var(--nav-height) + 0.8rem);
  max-height: calc(100vh - var(--nav-height) - 1.6rem);
  max-height: calc(100dvh - var(--nav-height) - 1.6rem);
  overflow: auto;
  padding: 1.2rem;
}

.results-panel {
  padding: 1rem;
  min-height: calc(100vh - var(--nav-height) - 2.4rem);
  min-height: calc(100dvh - var(--nav-height) - 2.4rem);
}

.results-header {
  padding: 0.2rem 0.3rem 1rem;
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.55rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-label i {
  color: var(--accent);
}

.required {
  color: var(--danger);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 0.78rem;
  background: var(--bg-card);
  color: var(--text-primary);
  font-size: 0.92rem;
  transition: all 0.2s ease;
}

.form-input,
.form-select {
  height: 2.85rem;
  padding: 0.7rem 0.9rem;
}

.form-textarea {
  min-height: 7.8rem;
  resize: vertical;
  padding: 0.85rem 0.95rem;
  line-height: 1.6;
}

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

.form-select {
  appearance: none;
  padding-right: 2.4rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Cpath d='M5 8.5L10 13.5L15 8.5' stroke='%2366758f' stroke-width='1.8' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-size: 0.95rem;
  background-position: right 0.8rem center;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus,
.chat-input-wrapper:has(.chat-input:focus) {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.upload-dropzone {
  border: 1.5px dashed var(--border-strong);
  border-radius: 0.9rem;
  background: var(--bg-card);
  min-height: 6.2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  text-align: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  padding: 0.8rem;
}

.upload-dropzone i {
  font-size: 1.35rem;
  color: var(--accent);
}

.upload-dropzone span {
  font-size: 0.87rem;
  font-weight: 600;
}

.upload-dropzone small {
  font-size: 0.76rem;
  color: var(--text-tertiary);
}

.upload-dropzone:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.visually-hidden-file {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.prompt-counter {
  margin-top: 0.45rem;
  text-align: right;
  font-size: 0.76rem;
  color: var(--text-tertiary);
}

.preview-container {
  display: none;
  margin-top: 0.72rem;
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  background: var(--bg-card);
  padding: 0.7rem;
  position: relative;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
  gap: 0.5rem;
}

.preview-item {
  border-radius: 0.62rem;
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  aspect-ratio: 1 / 1;
}

.preview-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.preview-meta {
  margin-top: 0.52rem;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.75rem;
}

.clear-preview-btn {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 999px;
  position: absolute;
  top: -0.4rem;
  right: -0.4rem;
  border: none;
  background: var(--danger);
  color: #fff;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 8px 16px rgba(239, 68, 68, 0.28);
}

.param-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.15rem;
}

.generate-btn {
  width: 100%;
  min-height: 2.95rem;
  border: none;
  border-radius: 0.88rem;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 14px 28px rgba(14, 165, 233, 0.28);
}

.generate-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 34px rgba(14, 165, 233, 0.36);
}

.generate-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.85rem;
}

.result-card {
  position: relative;
  border-radius: 0.95rem;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.08);
  transition: all 0.22s ease;
}

.result-card:hover {
  transform: translateY(-3px);
  border-color: rgba(14, 165, 233, 0.5);
  box-shadow: var(--shadow-md);
}

.result-card.is-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-md);
}

.result-image-wrapper {
  position: relative;
  width: 100%;
  padding-top: 100%;
  overflow: hidden;
  background: var(--bg-soft);
}

.result-image-wrapper img,
.result-image-wrapper video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.result-loading-placeholder,
.result-preview-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.38rem;
  text-align: center;
  padding: 0.8rem;
  color: var(--text-tertiary);
  background: var(--bg-soft);
}

.result-loading-placeholder i {
  font-size: 1.75rem;
  color: var(--accent);
}

.result-preview-fallback i {
  font-size: 2rem;
  color: var(--danger);
}

.result-preview-fallback p {
  font-size: 0.82rem;
}

.result-preview-fallback small {
  display: block;
  margin-top: 0.2rem;
  max-width: 90%;
  font-size: 0.68rem;
  color: var(--text-tertiary);
  word-break: break-all;
  opacity: 0.85;
}

.card-select {
  position: absolute;
  top: 0.62rem;
  right: 0.62rem;
  z-index: 9;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-5px);
  transition: all 0.2s ease;
}

.result-card:hover .card-select,
.multi-select-mode .card-select,
.result-card.is-selected .card-select {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.select-checkbox {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.card-select-indicator {
  width: 1.45rem;
  height: 1.45rem;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: transparent;
  display: grid;
  place-items: center;
  font-size: 0.66rem;
  transition: all 0.2s ease;
}

.select-checkbox:checked + .card-select-indicator {
  background: var(--accent);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.9);
}

.result-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.5rem;
  padding: 0.62rem;
  border-top: 1px solid var(--border);
}

.action-btn {
  border: 1px solid var(--border);
  border-radius: 0.62rem;
  background: var(--bg-soft);
  color: var(--text-secondary);
  min-height: 2.2rem;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.32rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.action-btn:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
  background: var(--accent-soft);
}

.empty-state {
  border: 1px dashed var(--border-strong);
  border-radius: 1rem;
  text-align: center;
  color: var(--text-tertiary);
  padding: clamp(2.2rem, 5vw, 4rem) 1rem;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0.12) 100%);
}

.empty-state i {
  font-size: clamp(2rem, 5vw, 3.1rem);
  margin-bottom: 0.85rem;
  color: var(--accent);
  opacity: 0.9;
}

.empty-state p {
  font-size: 1rem;
  font-weight: 650;
  margin-bottom: 0.25rem;
  color: var(--text-secondary);
}

.empty-state small {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.config-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(2, 8, 24, 0.58);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.config-content {
  width: min(510px, 100%);
  border-radius: 1.1rem;
  border: 1px solid var(--border);
  background: var(--bg-surface-strong);
  box-shadow: var(--shadow-lg);
  padding: 1.4rem 1.2rem;
  animation: pop-in 0.22s ease;
}

.config-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 1.25rem;
  margin-bottom: 1.1rem;
}

.config-title i {
  color: var(--accent);
}

.config-note {
  margin-top: 0.8rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.config-actions {
  display: flex;
  gap: 0.65rem;
  margin-top: 0.45rem;
}

.btn-primary,
.btn-secondary {
  border: 1px solid transparent;
  border-radius: 0.72rem;
  min-height: 2.6rem;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 650;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: var(--gradient-brand);
  box-shadow: 0 10px 18px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-secondary {
  color: var(--text-secondary);
  border-color: var(--border);
  background: var(--bg-soft);
}

.btn-secondary:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.spinner {
  animation: spin 1s linear infinite;
}

.progress-bar,
.selection-bar {
  position: fixed;
  left: 50%;
  transform: translate(-50%, 150%);
  z-index: 1500;
  border: 1px solid var(--border);
  background: var(--bg-surface-strong);
  backdrop-filter: blur(14px);
  border-radius: 999px;
  box-shadow: var(--shadow-md);
  transition: transform 0.26s ease;
}

.progress-bar {
  bottom: 1.05rem;
  min-height: 3rem;
  padding: 0.55rem 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 620;
  color: var(--text-secondary);
}

.progress-bar.show {
  transform: translate(-50%, 0);
}

.selection-bar {
  bottom: 1.05rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.42rem 0.55rem;
}

.selection-bar.show {
  transform: translate(-50%, 0);
}

.selection-bar > span {
  font-size: 0.84rem;
  color: var(--text-secondary);
  font-weight: 620;
  padding: 0 0.4rem;
}

.selection-bar .btn-primary,
.selection-bar .btn-secondary {
  min-height: 2.2rem;
  padding: 0.5rem 0.78rem;
  font-size: 0.82rem;
}

.error-toast {
  position: fixed;
  top: calc(var(--nav-height) + 0.75rem);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2100;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: rgba(239, 68, 68, 0.94);
  color: #fff;
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.32);
  box-shadow: 0 16px 34px rgba(185, 28, 28, 0.35);
  padding: 0.66rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  animation: fade-up 0.2s ease;
}

.hidden {
  display: none !important;
}

.glass {
  background: var(--bg-surface);
  backdrop-filter: blur(14px) saturate(140%);
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }

  to {
    transform: rotate(360deg);
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pop-in {
  from {
    opacity: 0;
    transform: scale(0.985) translateY(8px);
  }

  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

@media (max-width: 1240px) {
  .chat-container {
    grid-template-columns: minmax(220px, 270px) minmax(0, 1fr);
  }

  .image-container {
    grid-template-columns: minmax(290px, 340px) minmax(0, 1fr);
  }

  .results-grid {
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  }
}

@media (max-width: 1060px) {
  .chat-container {
    grid-template-columns: 1fr;
    gap: 0.82rem;
    height: auto;
    min-height: calc(100vh - var(--nav-height));
    min-height: calc(100dvh - var(--nav-height));
  }

  .chat-header {
    height: auto;
  }

  .chat-side-tips {
    margin-top: 0.75rem;
  }

  .chat-main {
    min-height: calc(100vh - var(--nav-height) - 250px);
    min-height: calc(100dvh - var(--nav-height) - 250px);
  }

  .image-container {
    grid-template-columns: 1fr;
  }

  .input-panel {
    position: static;
    max-height: none;
  }

  .results-panel {
    min-height: 0;
  }
}

@media (max-width: 820px) {
  :root {
    --nav-height: 66px;
  }

  .top-nav {
    grid-template-columns: auto 1fr auto;
    gap: 0.5rem;
    padding: 0 0.8rem;
  }

  .brand-subtitle {
    display: none;
  }

  .nav-center {
    justify-self: center;
  }

  .tab-button {
    min-height: 2.2rem;
    padding: 0.52rem 0.8rem;
    font-size: 0.82rem;
  }

  .tab-button span {
    display: none;
  }

  .chat-container,
  .image-container {
    padding: 0.8rem;
  }

  .chat-header,
  .chat-main,
  .input-panel,
  .results-panel {
    border-radius: 0.95rem;
  }

  .messages-area {
    padding: 0.95rem;
  }

  .chat-input-area {
    padding: 0.8rem;
  }

  .send-btn {
    min-width: 2.55rem;
  }

  .send-btn span {
    display: none;
  }

  .result-actions {
    grid-template-columns: 1fr;
  }

  .results-grid {
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 0.7rem;
  }

  .selection-bar {
    width: calc(100% - 1rem);
    border-radius: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0.65rem;
  }

  .selection-bar .btn-primary,
  .selection-bar .btn-secondary {
    flex: 1;
    min-width: 6rem;
  }

  .error-toast {
    width: calc(100% - 1rem);
    top: calc(var(--nav-height) + 0.55rem);
    justify-content: center;
  }

  .config-content {
    padding: 1rem 0.9rem;
  }
}

/* 大图预览模态框 */
.image-preview-modal {
  position: fixed;
  inset: 0;
  z-index: 2500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.92);
  backdrop-filter: blur(8px);
}

.preview-modal-content {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.preview-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 1.2rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 10;
}

.preview-close-btn:hover {
  background: rgba(239, 68, 68, 0.8);
  border-color: rgba(239, 68, 68, 0.6);
  transform: scale(1.05);
}

.preview-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 1.1rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 10;
}

.preview-nav-btn:hover {
  background: rgba(14, 165, 233, 0.8);
  border-color: rgba(14, 165, 233, 0.6);
  transform: translateY(-50%) scale(1.05);
}

.preview-nav-btn.prev {
  left: 2rem;
}

.preview-nav-btn.next {
  right: 2rem;
}

.preview-nav-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
  pointer-events: none;
}

.preview-image-container {
  max-width: 90%;
  max-height: calc(100vh - 12rem);
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-image-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 0.75rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.preview-actions {
  position: absolute;
  bottom: 5rem;
  display: flex;
  gap: 0.75rem;
  z-index: 10;
}

.preview-action-btn {
  padding: 0.7rem 1.2rem;
  border-radius: 0.75rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  backdrop-filter: blur(10px);
}

.preview-action-btn:hover {
  background: rgba(30, 41, 59, 0.9);
  border-color: rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.preview-action-btn.primary {
  background: var(--gradient-brand);
  border-color: transparent;
}

.preview-action-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(14, 165, 233, 0.4);
}

.preview-info {
  position: absolute;
  bottom: 2rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 10;
}

/* 简化卡片样式 - 只显示图片 */
.result-card-simple .result-actions {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  display: flex;
  gap: 0.4rem;
  padding: 0;
  border: none;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.result-card-simple:hover .result-actions {
}

/* 多选模式下隐藏删除按钮 */
.multi-select-mode .result-card-simple .result-actions {
  display: none !important;
  opacity: 1;
}

.result-card-simple .action-btn {
  width: 2rem;
  height: 2rem;
  min-height: 0;
  padding: 0;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
}

.result-card-simple .action-btn:hover {
  background: rgba(14, 165, 233, 0.9);
  transform: scale(1.1);
}

.result-card-simple .action-btn.delete-btn:hover {
  background: rgba(239, 68, 68, 0.9);
}

.result-card-simple .action-btn i {
  font-size: 0.85rem;
}

.result-card-simple .result-image-wrapper {
  cursor: pointer;
}

.hidden {
  display: none !important;
}

.btn-danger {
  border: 1px solid transparent;
  border-radius: 0.72rem;
  min-height: 2.6rem;
  padding: 0.6rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 650;
  cursor: pointer;
  transition: all 0.2s ease;
  color: #fff;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 10px 18px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 24px rgba(239, 68, 68, 0.4);
}

.selection-bar .btn-danger {
  min-height: 2.2rem;
  padding: 0.5rem 0.78rem;
  font-size: 0.82rem;
}

.new-chat-btn {
  width: 100%;
  min-height: 2.6rem;
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  background: var(--gradient-brand);
  color: #fff;
  font-size: 0.88rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 10px 20px rgba(14, 165, 233, 0.25);
  margin-bottom: 1rem;
}

.new-chat-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px rgba(14, 165, 233, 0.35);
}

.new-chat-btn i {
  font-size: 0.9rem;
}

.chat-sessions-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  margin-bottom: 1rem;
  border-top: 1px dashed var(--border);
  padding-top: 1rem;
}

.sessions-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
}

.sessions-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sessions-list {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  min-height: 0;
}

.sessions-list::-webkit-scrollbar {
  width: 6px;
}

.sessions-list::-webkit-scrollbar-thumb {
  background: var(--accent-soft-strong);
  border-radius: 999px;
}

.sessions-empty {
  text-align: center;
  color: var(--text-tertiary);
  font-size: 0.8rem;
  padding: 1.5rem 0.5rem;
}

.session-item {
  padding: 0.6rem 0.75rem;
  border-radius: 0.65rem;
  border: 1px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
}

.session-item:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.session-item.active {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.session-item-icon {
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 0.5rem;
  background: var(--gradient-brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.session-item-content {
  flex: 1;
  min-width: 0;
}

.session-item-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-item-time {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  margin-top: 0.1rem;
}

.session-item-actions {
  display: flex;
  gap: 0.25rem;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.session-item:hover .session-item-actions {
  opacity: 1;
}

.session-action-btn {
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 0.4rem;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 0.7rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.session-action-btn:hover {
  background: var(--bg-soft);
  color: var(--text-primary);
}

.session-action-btn.delete:hover {
  background: rgba(239, 68, 68, 0.15);
  color: var(--danger);
}

/* 修复大图预览按钮位置 */
.preview-modal-content {
  padding: 4rem 2rem 2rem;
}

.preview-image-container {
  max-height: calc(100vh - 16rem);
}

.preview-actions {
  bottom: 2rem;
}

.preview-info {
  bottom: 6rem;
}

/* 用户信息显示 */
.user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
}

.current-username {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-info .icon-btn {
  width: 2rem;
  height: 2rem;
  border: none;
}

/* 配额输入框样式 */
.quota-input {
  font-family: inherit;
  font-size: 0.85rem;
}

.quota-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

/* 用户管理表格样式优化 */
#userManagementContent table {
  font-size: 0.9rem;
}

#userManagementContent table th {
  background: var(--bg-soft);
  color: var(--text-primary);
}

#userManagementContent table td {
  color: var(--text-secondary);
}

#userManagementContent table tr:hover {
  background: var(--bg-soft);
}

/* 使用统计卡片动画 */
#usageStatsContent > div > div > div {
  animation: fade-up 0.3s ease both;
}

#usageStatsContent > div > div > div:nth-child(1) {
  animation-delay: 0.05s;
}

#usageStatsContent > div > div > div:nth-child(2) {
  animation-delay: 0.1s;
}

#usageStatsContent > div > div > div:nth-child(3) {
  animation-delay: 0.15s;
}

/* 响应式优化 */
@media (max-width: 820px) {
  .user-info {
    padding: 0.3rem 0.5rem;
    gap: 0.35rem;
  }
  
  .current-username {
    max-width: 80px;
    font-size: 0.8rem;
  }
  
  .user-info .icon-btn {
    width: 1.8rem;
    height: 1.8rem;
    font-size: 0.9rem;
  }
  
  #userManagementContent table {
    font-size: 0.8rem;
  }
  
  #userManagementContent table th,
  #userManagementContent table td {
    padding: 8px;
  }
  
  .quota-input {
    width: 60px !important;
    font-size: 0.75rem;
  }
}