:root {
  color-scheme: light;
  --bg: #f4f8fc;
  --bg-accent: #e4eef8;
  --panel: rgba(246, 250, 254, 0.88);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --line: rgba(86, 112, 142, 0.15);
  --line-strong: rgba(86, 112, 142, 0.22);
  --text: #24333e;
  --muted: #667988;
  --primary: #0053db;
  --primary-strong: #003fbb;
  --warm: #2c6ef2;
  --surface-low: #eef4f8;
  --surface-mid: #e4edf3;
  --danger: #b42318;
  --shadow: 0 16px 38px rgba(54, 83, 116, 0.12);
  --radius-xl: 22px;
  --radius-lg: 16px;
  --radius-md: 12px;
  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: "Manrope", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --shell-padding: 16px;
  --panel-padding: 18px;
}

* {
  box-sizing: border-box;
}

.material-symbols-outlined {
  font-variation-settings: "FILL" 0, "wght" 500, "GRAD" 0, "opsz" 24;
  font-size: 18px;
  line-height: 1;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.92), transparent 22%),
    radial-gradient(circle at bottom right, rgba(111, 182, 255, 0.2), transparent 32%),
    linear-gradient(135deg, var(--bg), var(--bg-accent));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent 90%);
}

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(86, 112, 142, 0.24);
  border-radius: 999px;
}

.app-shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(290px, 340px) minmax(0, 1fr);
  gap: 16px;
  height: 100vh;
  padding: var(--shell-padding);
}

.settings-panel,
.chat-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.settings-panel {
  display: flex;
  flex-direction: column;
  height: calc(100vh - (var(--shell-padding) * 2));
  padding: var(--panel-padding);
  overflow-y: auto;
  scrollbar-gutter: stable;
  background:
    linear-gradient(180deg, rgba(248, 251, 255, 0.96), rgba(240, 245, 250, 0.92));
}

.panel-top {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.engine-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: #f7fbff;
  background: linear-gradient(135deg, var(--primary), #4e85f5);
  box-shadow: 0 10px 18px rgba(0, 83, 219, 0.18);
}

.panel-section-label {
  margin-top: 16px;
  margin-bottom: -4px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-card {
  margin-top: 18px;
  padding: 14px;
  border: 1px solid rgba(86, 112, 142, 0.12);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.86);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.status-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.status-card-head p {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 0 5px rgba(0, 83, 219, 0.12);
}

.status-card strong {
  display: block;
  font-size: 14px;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.status-grid span {
  display: block;
  font-size: 11px;
  color: var(--muted);
}

.status-grid b {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  font-weight: 600;
}

.panel-badge,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(0, 83, 219, 0.1);
  color: var(--primary-strong);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.settings-panel h1,
.chat-header h2 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  line-height: 1.14;
}

.settings-panel h1 {
  font-size: clamp(18px, 2vw, 24px);
  letter-spacing: -0.02em;
}

.chat-header h2 {
  font-size: clamp(20px, 2.6vw, 28px);
}

.panel-copy,
.section-heading p,
.composer-tip,
.dropzone-copy span,
.security-note,
.message-subtle,
.empty-state p {
  color: var(--muted);
}

.settings-card {
  margin-top: 16px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel-strong);
}

.section-heading h2 {
  margin: 0;
  font-size: 16px;
}

.section-heading p {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.45;
}

.field {
  display: grid;
  gap: 6px;
  margin-top: 12px;
}

.field span {
  font-size: 12px;
  font-weight: 600;
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid rgba(86, 112, 142, 0.15);
  border-radius: 12px;
  background: #fcfeff;
  color: var(--text);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(0, 83, 219, 0.36);
  box-shadow: 0 0 0 4px rgba(0, 83, 219, 0.1);
}

.password-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.security-note {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0, 83, 219, 0.06);
  font-size: 12px;
  line-height: 1.45;
}

.chat-panel {
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  height: calc(100vh - (var(--shell-padding) * 2));
  padding: var(--panel-padding);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(251, 253, 255, 0.95), rgba(243, 248, 252, 0.92));
}

.chat-header,
.composer-footer,
.dropzone-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.dropzone-actions {
  margin-top: 16px;
}

.chat-header {
  position: relative;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.chat-header-main {
  min-width: 0;
}

.chat-subcopy {
  margin: 8px 0 0;
  max-width: 720px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

.chat-header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 12px;
  border: 1px solid rgba(86, 112, 142, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.chat-header h2 {
  margin-bottom: 0;
}

.dropzone {
  margin-top: 14px;
  padding: 14px;
  border: 1px solid rgba(86, 112, 142, 0.12);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(242, 247, 252, 0.96));
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.dropzone.dragover {
  transform: translateY(-2px);
  border-color: rgba(0, 83, 219, 0.3);
  background: linear-gradient(180deg, rgba(237, 244, 255, 0.96), rgba(228, 238, 249, 0.96));
}

.dropzone-copy {
  display: grid;
  gap: 6px;
}

.dropzone-copy span {
  display: block;
  max-width: 720px;
}

.dropzone-copy strong {
  font-size: 16px;
}

.state-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(228, 237, 243, 0.88);
  color: var(--primary-strong);
  font-size: 11px;
  font-weight: 700;
}

.state-pill .material-symbols-outlined {
  font-size: 15px;
}

.selected-file {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(86, 112, 142, 0.1);
  background: rgba(240, 245, 250, 0.88);
}

.selected-file-main {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.selected-file-icon,
.card-icon {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  color: var(--primary);
  background: rgba(219, 229, 239, 0.95);
}

.selected-file-name {
  font-weight: 600;
}

.selected-file-size {
  color: var(--muted);
  font-size: 12px;
}

.selected-file-state {
  flex: 0 0 auto;
}

.messages {
  min-height: 0;
  margin-top: 14px;
  padding-right: 6px;
  overflow-y: auto;
  overflow-x: hidden;
  display: grid;
  align-content: start;
  gap: 10px;
  scrollbar-gutter: stable;
}

.empty-state {
  padding: 18px;
  border-radius: 16px;
  border: 1px solid rgba(86, 112, 142, 0.12);
  background: rgba(255, 255, 255, 0.72);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.62);
}

.empty-state-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.empty-state h3 {
  margin: 0 0 6px;
}

.empty-state-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.empty-state-cell {
  padding: 14px;
  border: 1px solid rgba(86, 112, 142, 0.1);
  border-radius: 14px;
  background: rgba(244, 248, 252, 0.9);
}

.empty-state-cell .material-symbols-outlined {
  color: var(--primary);
}

.empty-state-cell strong {
  display: block;
  margin-top: 10px;
  font-size: 13px;
}

.empty-state-cell p {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.45;
}

.message {
  display: grid;
  gap: 4px;
  animation: riseIn 260ms ease;
}

.message.user {
  justify-items: end;
}

.message-meta {
  font-size: 11px;
  color: var(--muted);
}

.message-bubble {
  max-width: min(760px, 92%);
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(86, 112, 142, 0.08);
  background: rgba(255, 255, 255, 0.9);
  line-height: 1.45;
  box-shadow: 0 8px 20px rgba(54, 83, 116, 0.06);
}

.message-text {
  white-space: pre-wrap;
}

.message.user .message-bubble {
  background: linear-gradient(135deg, rgba(0, 83, 219, 0.96), rgba(47, 110, 242, 0.98));
  color: white;
  border-top-right-radius: 6px;
  border-color: transparent;
}

.message.ai .message-bubble,
.message.system .message-bubble {
  border-color: rgba(86, 112, 142, 0.08);
  border-top-left-radius: 6px;
}

.message.system .message-bubble {
  background: rgba(236, 243, 248, 0.96);
}

.message.error .message-bubble {
  background: rgba(255, 237, 236, 0.96);
  border-color: rgba(180, 35, 24, 0.18);
}

.file-chip,
.download-card,
.progress-card {
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 14px;
  border: 1px solid rgba(86, 112, 142, 0.08);
  background: rgba(244, 248, 252, 0.96);
}

.card-head,
.progress-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.card-head {
  justify-content: flex-start;
}

.progress-head {
  justify-content: space-between;
}

.file-chip strong,
.download-card strong,
.progress-card strong {
  display: block;
  line-height: 1.35;
}

.card-head .message-subtle,
.progress-head .message-subtle {
  display: block;
  margin-top: 2px;
  line-height: 1.35;
}

.download-button,
.primary-button,
.ghost-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, background 160ms ease;
  font-size: 14px;
}

.primary-button {
  color: white;
  background: linear-gradient(135deg, var(--warm), #0053db);
  box-shadow: 0 10px 18px rgba(0, 83, 219, 0.14);
}

.ghost-button,
.download-button {
  color: var(--text);
  background: rgba(228, 237, 243, 0.88);
}

.toolbar-button {
  border-radius: 14px;
}

.primary-button:hover,
.ghost-button:hover,
.download-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.ghost-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.progress-line {
  margin-top: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(86, 112, 142, 0.1);
  overflow: hidden;
}

.progress-line > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--primary), #6a93ff);
  transition: width 220ms ease;
}

.progress-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.progress-stat {
  padding: 8px 9px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(86, 112, 142, 0.08);
}

.progress-stat span {
  display: block;
  font-size: 10px;
  color: var(--muted);
  line-height: 1.2;
}

.progress-stat b {
  display: block;
  margin-top: 3px;
  font-size: 12px;
  line-height: 1.2;
}

.composer {
  margin-top: 14px;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow:
    0 18px 36px rgba(36, 51, 62, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(14px);
}

#promptInput {
  min-height: 82px;
  resize: vertical;
  border: none;
  background: transparent;
  box-shadow: none;
  padding: 10px 12px 6px;
}

.composer-tip {
  margin: 0;
  font-size: 12px;
}

.composer-footer {
  padding: 0 6px 4px 6px;
}

.footer-note {
  margin: 10px 0 0;
  text-align: center;
  font-size: 10px;
  font-weight: 500;
  color: var(--muted);
}

.hidden {
  display: none !important;
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

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

@media (max-width: 1080px) {
  .app-shell {
    grid-template-columns: 1fr;
    height: auto;
  }

  body {
    overflow: auto;
  }

  .settings-panel,
  .chat-panel {
    height: auto;
    min-height: 60vh;
  }

  .settings-panel {
    overflow: visible;
  }

  .chat-header-actions {
    width: 100%;
    justify-content: flex-start;
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: 10px;
    gap: 10px;
  }

  .settings-panel,
  .chat-panel {
    border-radius: 18px;
    padding: 14px;
  }

  .chat-header,
  .composer-footer,
  .dropzone-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .panel-top {
    grid-template-columns: 1fr;
  }

  .status-grid {
    grid-template-columns: 1fr;
  }

  .empty-state-grid,
  .progress-stats {
    grid-template-columns: 1fr;
  }

  .chat-header-actions {
    width: 100%;
  }

  .card-head,
  .progress-head,
  .selected-file {
    flex-direction: column;
    align-items: stretch;
  }

  .message-bubble {
    max-width: 100%;
  }
}