/* ── Design Tokens ─────────────────────────────────────────── */
:root {
  --color-bg:           #F5F4F0;
  --color-surface:      #FFFFFF;
  --color-border:       #E0DAD3;
  --color-border-focus: #4A7C59;
  --color-text:         #18181B;
  --color-text-muted:   #6B6560;
  --color-accent:       #2C5F3F;
  --color-accent-hover: #1E4530;
  --color-accent-light: #EEF5F0;
  --color-accent-mid:   #D4E8DB;
  --color-danger:       #C0392B;
  --color-danger-bg:    #FDF3F2;
  --color-warning-bg:   #FFFBEB;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.07), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.09), 0 2px 6px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.11), 0 4px 12px rgba(0, 0, 0, 0.06);

  --max-width: 1200px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 48px;
}

/* ── Reset & Base ───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  background-image:
    radial-gradient(circle at 20% 10%, rgba(44, 95, 63, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 90%, rgba(44, 95, 63, 0.03) 0%, transparent 50%);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Layout ─────────────────────────────────────────────────── */
.app-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* ── Header ─────────────────────────────────────────────────── */
.site-header {
  text-align: center;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.site-header__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent-mid);
  border-radius: 20px;
  padding: 3px 10px;
  margin-bottom: var(--spacing-sm);
}

.site-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--spacing-sm);
}

.site-subtitle {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.security-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.78rem;
  color: var(--color-accent);
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent-mid);
  border-radius: 20px;
  padding: 4px 12px;
}

/* ── Error Banner ───────────────────────────────────────────── */
.error-banner {
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  color: var(--color-danger);
  font-size: 0.9rem;
}

/* ── Drop Zone ──────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.drop-zone:hover,
.drop-zone--hover {
  border-color: var(--color-border-focus);
  background: var(--color-accent-light);
  box-shadow: var(--shadow-md);
}

.drop-zone--active {
  border-color: var(--color-accent);
  background: #E8F2EC;
  box-shadow: 0 0 0 4px rgba(44, 95, 63, 0.12), var(--shadow-md);
}

.drop-zone--loading {
  pointer-events: none;
  opacity: 0.7;
}

.drop-zone__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 52px var(--spacing-lg);
  gap: var(--spacing-sm);
  text-align: center;
}

.drop-zone__icon {
  color: var(--color-accent);
  opacity: 0.65;
  margin-bottom: 4px;
}

.drop-zone__primary {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--color-text);
}

.drop-zone__secondary {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.drop-zone__buttons {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  flex-wrap: wrap;
  justify-content: center;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  border: none;
  cursor: pointer;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9rem;
  transition: background 0.15s, color 0.15s, border-color 0.15s, box-shadow 0.15s, opacity 0.15s;
  line-height: 1;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn--primary {
  background: var(--color-accent);
  color: #fff;
  padding: 10px 24px;
  box-shadow: 0 2px 8px rgba(44, 95, 63, 0.28);
}
.btn--primary:hover:not(:disabled) {
  background: var(--color-accent-hover);
  box-shadow: 0 4px 14px rgba(44, 95, 63, 0.35);
}

.btn--secondary {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 8px 16px;
}
.btn--secondary:hover:not(:disabled) {
  border-color: var(--color-border-focus);
  background: var(--color-accent-light);
  box-shadow: var(--shadow-sm);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  padding: 8px 16px;
}
.btn--ghost:hover:not(:disabled) {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.04);
}

.btn--large {
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: var(--radius-md);
}

/* ── Progress ───────────────────────────────────────────────── */
.progress-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.progress-bar-wrapper {
  height: 5px;
  background: var(--color-border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), #4A9E6B);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.progress-label {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ── Summary Stats ──────────────────────────────────────────── */
.summary-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  flex-direction: column;
  gap: 3px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}
.stat-card:hover { box-shadow: var(--shadow-md); }

.stat-card--accent {
  border-color: var(--color-accent-mid);
  background: linear-gradient(135deg, var(--color-accent-light) 0%, #F7FBF8 100%);
}

.stat-label {
  font-size: 0.73rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 500;
}

.stat-value {
  font-size: 1.65rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.stat-value.mono {
  font-family: var(--font-mono);
  font-size: 1.45rem;
}

.stat-unit {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ── Action Bar ─────────────────────────────────────────────── */
.action-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ── Results Table ──────────────────────────────────────────── */
.table-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.table-wrapper {
  overflow-x: auto;
  overflow-y: auto;
  max-height: 60vh;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.results-table thead th {
  position: sticky;
  top: 0;
  background: var(--color-accent);
  color: #fff;
  z-index: 2;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
  padding: 11px 12px;
  text-align: left;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.results-table thead th:last-child { border-right: none; }
.results-table thead th.num { text-align: right; }

.results-table tbody tr {
  border-bottom: 1px solid var(--color-border);
  transition: background 0.1s;
}

.results-table tbody tr:hover { background: var(--color-accent-light); }
.results-table tbody tr:last-child { border-bottom: none; }

.results-table tbody tr:nth-child(even) {
  background: #FAFAF8;
}
.results-table tbody tr:nth-child(even):hover {
  background: var(--color-accent-light);
}

.results-table td {
  padding: 8px 12px;
  vertical-align: middle;
  color: var(--color-text);
}

.results-table td.num,
.results-table th.num {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  white-space: nowrap;
}

.results-table td.code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.results-table td.decl-number {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  white-space: nowrap;
}

.results-table tfoot tr {
  background: var(--color-accent-light);
}

.results-table tfoot td {
  padding: 10px 12px;
  font-weight: 700;
  border-top: 2px solid var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

/* ── Parse Warnings ─────────────────────────────────────────── */
.warnings-details {
  background: var(--color-warning-bg);
  border: 1px solid #F0D060;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-size: 0.85rem;
}

.warnings-details summary {
  cursor: pointer;
  font-weight: 600;
  color: #8A6D00;
  user-select: none;
}
.warnings-details summary:hover { color: #5A4600; }

.warning-badge {
  display: inline-block;
  background: #F0D060;
  color: #5A4600;
  border-radius: 10px;
  padding: 0 6px;
  font-size: 0.75rem;
  font-weight: 700;
  margin: 0 2px;
}

#warningsList {
  margin-top: var(--spacing-sm);
  padding-left: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

#warningsList li {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

/* ── Debug Panel ────────────────────────────────────────────── */
.debug-panel {
  background: #F9F8F6;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  font-size: 0.85rem;
}

.debug-panel summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text-muted);
  user-select: none;
}

.debug-panel__hint {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  margin: var(--spacing-sm) 0;
}

.debug-panel textarea {
  width: 100%;
  min-height: 160px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm);
  resize: vertical;
  color: var(--color-text);
  margin-top: var(--spacing-sm);
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

.site-footer strong {
  color: var(--color-text);
  font-weight: 600;
}

.site-footer__sep {
  color: var(--color-border);
  font-size: 0.9rem;
}

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  .app-container { padding: var(--spacing-lg) var(--spacing-md); }

  .summary-stats { grid-template-columns: 1fr; }

  .drop-zone__inner { padding: 36px var(--spacing-md); }

  .drop-zone__buttons { flex-direction: column; width: 100%; }
  .drop-zone__buttons .btn { width: 100%; justify-content: center; }

  .action-bar { flex-direction: column; align-items: stretch; }
  .action-bar .btn { text-align: center; justify-content: center; }

  .site-footer { flex-direction: column; gap: 4px; text-align: center; }
}

/* ── Utility ────────────────────────────────────────────────── */
[hidden] { display: none !important; }