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

:root {
  --color-bg: #f7f6f3;
  --color-surface: #ffffff;
  --color-border: #e5e3dd;
  --color-border-strong: #c8c6be;
  --color-text: #1a1a18;
  --color-text-muted: #6b6b66;
  --color-text-hint: #9e9e99;
  --color-accent: #1a6b4a;
  --color-accent-light: #e8f5ef;
  --color-warning-bg: #fff8e6;
  --color-warning-border: #f0c040;
  --color-warning-text: #7a5500;
  --color-success-bg: #eaf5ef;
  --color-success-border: #5db88a;
  --color-success-text: #1a5c38;
  --color-danger-bg: #fdf0f0;
  --color-danger-border: #e8a0a0;
  --color-danger-text: #8b2020;
  --color-active-bg: #eaf5ef;
  --color-active-border: #1a6b4a;
  --color-active-text: #1a6b4a;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1a1a18;
    --color-surface: #252523;
    --color-border: #333330;
    --color-border-strong: #4a4a46;
    --color-text: #f0eeea;
    --color-text-muted: #a0a09a;
    --color-text-hint: #6b6b66;
    --color-accent: #4db87a;
    --color-accent-light: #1a3328;
    --color-warning-bg: #2a2010;
    --color-warning-border: #a07820;
    --color-warning-text: #f0c040;
    --color-success-bg: #0f2a1e;
    --color-success-border: #2a6b48;
    --color-success-text: #5db88a;
    --color-danger-bg: #2a1010;
    --color-danger-border: #8b2020;
    --color-danger-text: #e88080;
    --color-active-bg: #1a3328;
    --color-active-border: #4db87a;
    --color-active-text: #4db87a;
  }
}

html { font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  padding: 1.5rem 1rem 3rem;
}

.app {
  max-width: 680px;
  margin: 0 auto;
}

/* Header */
.header {
  text-align: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 6px;
}

.logo-icon { font-size: 28px; }
.logo-text { font-size: 22px; font-weight: 600; color: var(--color-text); letter-spacing: -0.02em; }
.header-sub { font-size: 14px; color: var(--color-text-muted); }

/* Banners */
.banner {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.5;
  margin-bottom: 1rem;
}

.banner-icon { font-size: 16px; flex-shrink: 0; margin-top: 1px; }

.banner--warning {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  color: var(--color-warning-text);
}

.banner--success {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  color: var(--color-success-text);
}

/* Section label */
.section-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  margin-bottom: 10px;
  margin-top: 1.5rem;
}

.section-label:first-child { margin-top: 0; }

/* Type grid */
.type-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 1.5rem;
}

.type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: all 0.15s ease;
  font-family: var(--font);
}

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

.type-btn.active {
  background: var(--color-active-bg);
  border-color: var(--color-active-border);
  border-width: 2px;
  color: var(--color-active-text);
}

.type-icon { font-size: 22px; }

/* Upload zone */
.upload-zone {
  border: 2px dashed var(--color-border-strong);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s ease;
  background: var(--color-surface);
  margin-bottom: 1rem;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.upload-icon { font-size: 32px; margin-bottom: 10px; }
.upload-title { font-size: 15px; font-weight: 500; color: var(--color-text); margin-bottom: 4px; }
.upload-hint { font-size: 13px; color: var(--color-text-muted); }

#file-input { display: none; }

/* File selected */
.file-selected {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  font-size: 13px;
  color: var(--color-text-muted);
}

.file-selected strong { color: var(--color-text); }
.file-selected .file-size { margin-left: 4px; }

.remove-file {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 18px;
  color: var(--color-text-hint);
  padding: 0 4px;
  line-height: 1;
  font-family: var(--font);
}

.remove-file:hover { color: var(--color-text); }

/* Divider */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 1.25rem 0;
}

.divider-line {
  flex: 1;
  height: 1px;
  background: var(--color-border);
}

.divider-text {
  font-size: 12px;
  color: var(--color-text-hint);
  white-space: nowrap;
}

/* Textarea */
.text-area {
  width: 100%;
  min-height: 130px;
  resize: vertical;
  padding: 12px 14px;
  font-size: 14px;
  font-family: var(--font);
  line-height: 1.6;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.text-area::placeholder { color: var(--color-text-hint); }
.text-area:focus { outline: none; border-color: var(--color-accent); }

/* Meta row */
.meta-row {
  display: flex;
  gap: 12px;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.meta-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.meta-field label {
  font-size: 12px;
  color: var(--color-text-muted);
  font-weight: 500;
}

.meta-field input,
.meta-field select {
  padding: 8px 12px;
  font-size: 14px;
  font-family: var(--font);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  transition: border-color 0.15s;
}

.meta-field input { width: 100px; }
.meta-field select { width: 160px; }

.meta-field input:focus,
.meta-field select:focus {
  outline: none;
  border-color: var(--color-accent);
}

/* Consent */
.consent-box {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin: 1.25rem 0;
}

.consent-box input[type="checkbox"] {
  margin-top: 2px;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.consent-box label {
  font-size: 13px;
  color: var(--color-text-muted);
  line-height: 1.5;
  cursor: pointer;
}

/* Analyze button */
.analyze-btn {
  width: 100%;
  padding: 15px;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  cursor: pointer;
  font-family: var(--font);
  transition: all 0.15s ease;
  letter-spacing: 0.01em;
}

.analyze-btn:hover:not(:disabled) {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.analyze-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Loading */
.loading-section {
  text-align: center;
  padding: 3rem 1rem;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 0 auto 16px;
}

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

.loading-section p { font-size: 15px; color: var(--color-text-muted); }
.loading-hint { font-size: 13px; color: var(--color-text-hint); margin-top: 6px; }

/* Result */
.result-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-top: 1rem;
  box-shadow: var(--shadow-sm);
}

.result-header {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.result-content {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text);
  white-space: pre-wrap;
  word-break: break-word;
}

.result-content.streaming::after {
  content: '▋';
  animation: blink 0.7s infinite;
  color: var(--color-accent);
}

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

.result-footer {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-border);
}

/* Buttons */
.btn {
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  border: 1px solid transparent;
}

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

.btn--secondary:hover {
  background: var(--color-border);
}

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

.btn--danger:hover {
  filter: brightness(0.95);
}

.anon-note {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-hint);
  margin-top: 1rem;
}

/* Footer */
.footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 12px;
  color: var(--color-text-hint);
  text-align: center;
  line-height: 1.6;
}

.footer p + p { margin-top: 4px; }

/* Mobile */
@media (max-width: 480px) {
  body { padding: 1rem 0.75rem 2rem; }
  .type-grid { grid-template-columns: repeat(3, 1fr); }
  .type-btn span:last-child { font-size: 11px; }
  .meta-row { flex-direction: column; }
  .meta-field input, .meta-field select { width: 100%; }
  .result-footer { flex-direction: column; }
  .btn { width: 100%; text-align: center; }
}