frontend/src/App.css

.content-layout {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 var(--spacing-3);
  box-sizing: border-box;
}

.model-selector-wrap {
  display: flex;
  justify-content: flex-end;
  margin-top: 14px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--color-fg-default);
  cursor: default;
  user-select: none;
}

.logo-icon {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background-color: #ffffff;
  padding: 12px;
  box-sizing: border-box;
  animation: logo-spin 10s linear infinite;
  display: block;
}

@keyframes logo-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logo-text {
  font-size: 96px;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--color-fg-default);
}

/* ─── Model selector ─────────────────────────────────────── */
.model-select {
  appearance: none;
  background: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: 6px;
  color: var(--color-fg-default);
  font-size: 13px;
  font-family: inherit;
  padding: 5px 26px 5px 10px;
  cursor: pointer;
  transition: border-color 0.2s, box-shadow 0.2s;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
}

.model-select:hover { border-color: var(--color-border-default); }
.model-select:focus {
  outline: none;
  border-color: var(--color-accent-emphasis);
  box-shadow: 0 0 0 2px rgba(31, 111, 235, 0.2);
}
.model-select:disabled { opacity: 0.4; cursor: not-allowed; }

.model-select--ready {
  border-color: rgba(46, 160, 67, 0.6) !important;
  box-shadow: 0 0 0 2px rgba(46, 160, 67, 0.1);
}
.model-select--warming {
  border-color: rgba(210, 153, 34, 0.6) !important;
  box-shadow: 0 0 0 2px rgba(210, 153, 34, 0.08);
}

/* Hero */
.main {
  flex: 1;
  padding: var(--spacing-6) 0 var(--spacing-5);
}

/* Hero */
.hero {
  margin-bottom: var(--spacing-4);
  text-align: left;
}

.hero-logo {
  justify-content: flex-start;
}

/* ─── Card ───────────────────────────────────────────────── */
.card-wrap {
  background-color: var(--color-canvas-subtle);
  border: 1px solid var(--color-border-default);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

/* ─── Segmented control ──────────────────────────────────── */
.seg-control {
  display: flex;
  gap: 6px;
  padding: 18px 32px 0;
  border-bottom: 1px solid var(--color-border-muted);
}

.seg-btn {
  position: relative;
  padding: 8px 24px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-fg-muted);
  background: transparent;
  border: none;
  border-radius: 6px 6px 0 0;
  cursor: pointer;
  transition: color 0.15s;
  margin-bottom: -1px;
  border-bottom: 2px solid transparent;
}

.seg-btn:hover {
  color: var(--color-fg-default);
}

.seg-btn--active {
  color: var(--color-fg-default);
  border-bottom-color: var(--color-accent-fg);
}

/* ─── Dropzone ───────────────────────────────────────────── */
/* (styles in index.css for .dropzone base) */

.dropzone-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-fg-subtle);
  background: var(--color-canvas-default);
  border: 1px solid var(--color-border-muted);
  border-radius: var(--radius-full);
  padding: 2px 10px;
  pointer-events: none;
  user-select: none;
}
.panels {
  padding: 32px 32px 0;
}

.panel {
  display: none;
}

.panel--active {
  display: block;
  animation: fadeUp 0.18s ease-out both;
}

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

/* ─── Fields ─────────────────────────────────────────────── */
.field {
  margin-bottom: var(--spacing-3);
}

.field-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-fg-muted);
  margin-bottom: 8px;
}

.field-label-hint {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-fg-subtle);
}

/* ─── Input overrides ────────────────────────────────────── */
.input--lg {
  padding: 14px 16px;
  font-size: 16px;
  border-radius: 8px;
}

/* ─── File chip ──────────────────────────────────────────── */
.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 5px 10px 5px 8px;
  background: var(--color-canvas-inset);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  font-size: 13px;
  color: var(--color-fg-default);
}

.file-chip svg { color: var(--color-fg-muted); flex-shrink: 0; }

.file-chip__name {
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-chip__size {
  color: var(--color-fg-subtle);
  font-size: 11px;
  flex-shrink: 0;
}

.file-chip__remove {
  display: flex;
  align-items: center;
  padding: 2px;
  background: transparent;
  border: none;
  color: var(--color-fg-subtle);
  cursor: pointer;
  border-radius: 50%;
  transition: color 0.12s, background-color 0.12s;
  margin-left: 2px;
}

.file-chip__remove:hover {
  color: var(--color-danger-fg);
  background-color: rgba(248, 81, 73, 0.12);
}

/* ─── Action row ─────────────────────────────────────────── */
.action-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 12px 24px;
  border-top: 1px solid var(--color-border-muted);
  margin-top: var(--spacing-3);
}

.generate-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.btn-generate {
  padding: 8px 20px;
  font-size: 14px;
  border-radius: 8px;
  gap: 7px;
}

.action-hint {
  font-size: 10px;
  color: var(--color-fg-subtle);
  margin: 0;
}

.action-hint kbd {
  font-family: inherit;
  font-size: 9px;
  background: var(--color-canvas-inset);
  border: 1px solid var(--color-border-muted);
  border-radius: 4px;
  padding: 0 4px;
  color: var(--color-fg-muted);
}

/* ─── Cancel button ──────────────────────────────────────── */
.btn-cancel {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 8px;
  border: 1px solid rgba(248, 81, 73, 0.35);
  background-color: rgba(248, 81, 73, 0.07);
  color: var(--color-danger-fg);
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s;
}

.btn-cancel:hover {
  background-color: rgba(248, 81, 73, 0.14);
  border-color: rgba(248, 81, 73, 0.55);
}

/* ─── Loading ────────────────────────────────────────────── */
.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border-default);
  border-top-color: var(--color-accent-fg);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ─── Inline result ──────────────────────────────────────── */
.inline-result {
  margin: var(--spacing-2) 0 var(--spacing-3);
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
  border: 1px solid transparent;
  overflow: hidden;
}

.inline-result--error {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background-color: rgba(248, 81, 73, 0.07);
  border-color: rgba(248, 81, 73, 0.25);
  color: var(--color-danger-fg);
}

.inline-result--loading,
.inline-result--streaming {
  background-color: var(--color-canvas-inset);
  border-color: var(--color-border-muted);
}

.inline-result--streaming {
  border-color: rgba(31, 111, 235, 0.35);
}

.inline-result--success {
  background-color: rgba(22, 27, 34, 0.6);
  border-color: var(--color-border-muted);
  border-left: 3px solid var(--color-accent-emphasis);
}

.inline-result__label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--color-border-muted);
}

.inline-result--success .inline-result__label {
  color: var(--color-accent-fg);
}

.inline-result--streaming .inline-result__label {
  color: var(--color-fg-muted);
}

.inline-result__text {
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-fg-default);
}

/* ── Prose ──────────────────────────────────────────────── */
.inline-result__text p { margin: 0 0 0.6em; }
.inline-result__text p:last-child { margin-bottom: 0; }

.inline-result__text h1,
.inline-result__text h2,
.inline-result__text h3,
.inline-result__text h4,
.inline-result__text h5,
.inline-result__text h6 {
  font-weight: 600;
  line-height: 1.3;
  margin: 0.9em 0 0.35em;
  color: var(--color-fg-default);
}
.inline-result__text h1 { font-size: 1.35em; }
.inline-result__text h2 { font-size: 1.2em; }
.inline-result__text h3 { font-size: 1.08em; }
.inline-result__text h4,
.inline-result__text h5,
.inline-result__text h6 { font-size: 1em; }
.inline-result__text h1:first-child,
.inline-result__text h2:first-child,
.inline-result__text h3:first-child { margin-top: 0; }

.inline-result__text ul,
.inline-result__text ol { margin: 0.4em 0 0.6em; padding-left: 1.5em; }
.inline-result__text ul { list-style-type: disc; }
.inline-result__text ol { list-style-type: decimal; }
.inline-result__text ul ul, .inline-result__text ol ul { list-style-type: circle; }
.inline-result__text ul ol, .inline-result__text ol ol { list-style-type: lower-alpha; }
.inline-result__text ul ul, .inline-result__text ol ul,
.inline-result__text ul ol, .inline-result__text ol ol { margin: 0.15em 0; padding-left: 1.4em; }
.inline-result__text ul ul ul, .inline-result__text ol ul ul { list-style-type: square; }
.inline-result__text li { margin: 0.2em 0; }
.inline-result__text li > p { margin: 0; }

.inline-result__text strong { font-weight: 600; }
.inline-result__text em { font-style: italic; }

.inline-result__text blockquote {
  margin: 0.6em 0;
  padding: 0.3em 0 0.3em 0.9em;
  border-left: 3px solid var(--color-border-default);
  color: var(--color-fg-muted);
  font-style: italic;
}

.inline-result__text code {
  font-family: var(--font-mono);
  font-size: 12px;
  background-color: var(--color-canvas-inset);
  border: 1px solid var(--color-border-muted);
  border-radius: 3px;
  padding: 0.1em 0.35em;
}

.inline-result__text pre {
  background-color: var(--color-canvas-inset);
  border: 1px solid var(--color-border-muted);
  border-radius: 6px;
  padding: 0.75em 1em;
  margin: 0.6em 0;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.6;
}
.inline-result__text pre code { background: none; border: none; padding: 0; font-size: inherit; }
.inline-result__text hr { border: none; border-top: 1px solid var(--color-border-muted); margin: 0.8em 0; }

/* ─── Response badge ─────────────────────────────────────── */
.response-badge {
  font-size: 10px;
  font-weight: 500;
  padding: 1px 7px;
  border-radius: var(--radius-full);
  background-color: var(--color-canvas-default);
  border: 1px solid var(--color-border-muted);
  color: var(--color-fg-subtle);
  letter-spacing: 0;
  text-transform: none;
}

/* ─── Streaming cursor ───────────────────────────────────── */
.streaming-cursor {
  display: inline-block;
  animation: blink 0.75s step-end infinite;
  color: var(--color-accent-fg);
  margin-left: 1px;
}

@keyframes blink { 50% { opacity: 0; } }

.streaming-placeholder {
  color: var(--color-fg-subtle);
  font-style: italic;
  font-size: 13px;
}

/* ─── Footer ─────────────────────────────────────────────── */
.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: var(--spacing-3);
  font-size: 12px;
  color: var(--color-fg-subtle);
  border-top: 1px solid var(--color-border-muted);
}

.footer-sep { opacity: 0.4; }

.footer a {
  color: var(--color-fg-subtle);
  text-decoration: none;
  transition: color 0.12s;
}

.footer a:hover { color: var(--color-fg-muted); }

/* Fade-in */
.fade-in { animation: fadeUp 0.25s ease-out both; }

/* Tooltips (Desktop Only) */
@media (hover: hover) and (min-width: 769px) {
  [data-tooltip] {
    position: relative;
  }

  [data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    background-color: #24292f;
    color: #ffffff;
    font-size: 11px;
    font-family: var(--font-family-sans);
    font-weight: 500;
    padding: 5px 8px;
    border-radius: 6px;
    border: 1px solid #30363d;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease, transform 0.12s ease;
    z-index: 100;
  }

  [data-tooltip]::before {
    content: "";
    position: absolute;
    bottom: 115%;
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    border-width: 5px;
    border-style: solid;
    border-color: #24292f transparent transparent transparent;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.12s ease, transform 0.12s ease;
    z-index: 100;
  }

  [data-tooltip]:hover::after,
  [data-tooltip]:hover::before {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }

  /* Align Generate tooltip to the right edge to prevent card overflow clipping */
  .btn-generate[data-tooltip]::after {
    left: auto;
    right: 0;
    transform: translateY(4px);
  }
  .btn-generate[data-tooltip]::before {
    left: auto;
    right: 20px;
    transform: translateY(4px);
  }
  .btn-generate[data-tooltip]:hover::after,
  .btn-generate[data-tooltip]:hover::before {
    transform: translateY(0);
  }
}

/* Media Queries (Mobile Friendly) */
@media (max-width: 768px) {
  .logo {
    gap: 16px;
  }
  .logo-icon {
    width: 64px;
    height: 64px;
    padding: 8px;
  }
  .logo-text {
    font-size: 56px;
  }
  .seg-control {
    padding: 14px 20px 0;
  }
  .seg-btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  .panels {
    padding: 24px 20px 0;
  }
  .action-row {
    padding: 16px 20px;
  }
  .action-hint {
    display: none;
  }
}

@media (max-width: 480px) {
  .logo {
    gap: 12px;
  }
  .logo-icon {
    width: 48px;
    height: 48px;
    padding: 6px;
  }
  .logo-text {
    font-size: 36px;
  }
  .seg-control {
    padding: 12px 12px 0;
    justify-content: space-between;
  }
  .seg-btn {
    flex: 1;
    text-align: center;
    padding: 8px 8px;
  }
  .panels {
    padding: 20px 12px 0;
  }
  .action-row {
    flex-direction: column;
    gap: 10px;
    padding: 16px 12px;
  }
  .action-row .btn {
    width: 100%;
    justify-content: center;
  }
  .model-selector-wrap {
    justify-content: center;
    margin-top: 16px;
  }
  .model-select {
    width: 100%;
  }
}