:root {
  --bg: #0a0c10;
  --bg-elevated: #11141a;
  --fg: #eef1f5;
  --fg-muted: #8b94a3;
  --accent: #00d4aa;
  --accent-hover: #26e8c4;
  --accent-glow: rgba(0, 212, 170, 0.25);
  --border: #1f2530;
  --border-strong: #2a3140;
  --card: #0f1217;
  --card-elevated: #14181f;
  --danger: #ff5a5a;
  --danger-dim: rgba(255, 90, 90, 0.12);
  --warning: #ffb547;
  --warning-dim: rgba(255, 181, 71, 0.12);
  --profit: #00d4aa;
  --loss: #ff5a5a;
  --info: #4da3ff;
  --info-dim: rgba(77, 163, 255, 0.12);
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --gradient-accent: linear-gradient(135deg, #00d4aa 0%, #26e8c4 100%);
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6fa;
    --bg-elevated: #ffffff;
    --fg: #1a1d24;
    --fg-muted: #5c6370;
    --accent: #009e7a;
    --accent-hover: #00b891;
    --accent-glow: rgba(0, 158, 122, 0.20);
    --accent-dim: rgba(0, 158, 122, 0.08);
    --border: #e3e7ee;
    --border-strong: #d4d9e2;
    --card: #ffffff;
    --card-elevated: #fbfcfe;
    --danger: #d63031;
    --danger-dim: rgba(214, 48, 49, 0.10);
    --warning: #d97706;
    --warning-dim: rgba(217, 119, 6, 0.10);
    --profit: #009e7a;
    --loss: #d63031;
    --info: #2563eb;
    --info-dim: rgba(37, 99, 235, 0.10);
    --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 8px 32px rgba(16, 24, 40, 0.08);
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(0, 212, 170, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 0%, rgba(77, 163, 255, 0.05), transparent 55%),
    var(--bg);
  color: var(--fg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--bg);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  z-index: 1000;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header {
  background: color-mix(in srgb, var(--bg-elevated) 88%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}

.logo svg {
  width: 34px;
  height: 34px;
  color: var(--accent);
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

nav ul {
  display: flex;
  list-style: none;
  gap: 0.25rem;
}

nav a {
  display: block;
  padding: 0.5rem 1.05rem;
  border-radius: 999px;
  color: var(--fg-muted);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  transition: all var(--transition);
}

nav a:hover {
  color: var(--fg);
  background: var(--accent-dim);
}

nav a.active {
  color: var(--accent);
  background: var(--accent-dim);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent);
}

main {
  flex: 1;
  padding: 3.5rem 0 4rem;
}

footer {
  background:
    linear-gradient(180deg, transparent, color-mix(in srgb, var(--bg-elevated) 60%, transparent)),
    var(--bg-elevated);
  border-top: 1px solid var(--border);
  padding: 2.5rem 0 2rem;
  text-align: center;
  color: var(--fg-muted);
  font-size: 0.875rem;
}

footer .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.version-stamp {
  opacity: 0.55;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--bg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.78rem 1.6rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #06211a;
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 22px var(--accent-glow);
}

.btn-secondary {
  background: var(--card);
  color: var(--fg);
  border-color: var(--border-strong);
}

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

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

.card {
  background: linear-gradient(180deg, var(--card) 0%, color-mix(in srgb, var(--card) 92%, var(--bg)) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 12px 40px rgba(0, 0, 0, 0.4);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--fg);
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
}

input[type="file"] {
  display: block;
  width: 100%;
  padding: 1rem;
  background: var(--bg);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition);
}

input[type="file"]:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

input[type="file"]:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.file-drop-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
  text-align: center;
  background:
    radial-gradient(400px 200px at 50% 0%, var(--accent-dim), transparent 70%),
    var(--bg);
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.file-drop-zone:hover,
.file-drop-zone.drag-over {
  border-color: var(--accent);
  background:
    radial-gradient(400px 200px at 50% 0%, var(--accent-dim), transparent 70%),
    var(--bg);
  box-shadow: 0 0 0 4px var(--accent-dim), inset 0 0 0 1px var(--accent);
}

.file-drop-zone.drag-over {
  transform: scale(1.005);
}

.file-drop-zone svg {
  width: 56px;
  height: 56px;
  color: var(--accent);
  margin-bottom: 1rem;
  filter: drop-shadow(0 0 10px var(--accent-glow));
}

.file-drop-zone p {
  color: var(--fg);
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.file-drop-zone .hint {
  font-size: 0.8125rem;
  color: var(--fg-muted);
  opacity: 0.7;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  background: linear-gradient(180deg, var(--card) 0%, color-mix(in srgb, var(--card) 88%, var(--bg)) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 32px rgba(0, 0, 0, 0.35);
  border-color: var(--border-strong);
}

.stat-card:hover::before {
  opacity: 1;
}

.stat-card .label {
  font-size: 0.72rem;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.6rem;
}

.stat-card .value {
  font-size: 1.6rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--fg);
  letter-spacing: -0.02em;
}

.stat-card .value.positive {
  color: var(--profit);
}

.stat-card .value.negative {
  color: var(--loss);
}

.stat-card .value.neutral {
  color: var(--warning);
}

.table-container {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow-sm);
}

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

th, td {
  padding: 0.8rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-elevated);
  font-weight: 600;
  color: var(--fg-muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  position: sticky;
  top: 0;
  z-index: 1;
}

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

tr:hover td {
  background: var(--accent-dim);
}

td.mono {
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

td.right {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

td.center {
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.7rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-buy {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}

.badge-sell {
  background: var(--danger-dim);
  color: var(--loss);
  border: 1px solid color-mix(in srgb, var(--loss) 25%, transparent);
}

.badge-equity {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
}

.badge-fo {
  background: var(--warning-dim);
  color: var(--warning);
  border: 1px solid color-mix(in srgb, var(--warning) 25%, transparent);
}

.badge-commodity {
  background: var(--danger-dim);
  color: var(--loss);
  border: 1px solid color-mix(in srgb, var(--loss) 25%, transparent);
}

.badge-currency {
  background: var(--info-dim);
  color: var(--info);
  border: 1px solid color-mix(in srgb, var(--info) 25%, transparent);
}

.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  border: 1px solid;
  backdrop-filter: blur(6px);
}

.alert-error {
  background: var(--danger-dim);
  border-color: color-mix(in srgb, var(--loss) 30%, transparent);
  color: var(--loss);
}

.alert-success {
  background: var(--accent-dim);
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  color: var(--accent);
}

.alert-warning {
  background: var(--warning-dim);
  border-color: color-mix(in srgb, var(--warning) 30%, transparent);
  color: var(--warning);
}

.alert-info {
  background: var(--info-dim);
  border-color: color-mix(in srgb, var(--info) 30%, transparent);
  color: var(--info);
}

.file-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  background: linear-gradient(180deg, var(--card) 0%, color-mix(in srgb, var(--card) 90%, var(--bg)) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
  transition: box-shadow var(--transition), border-color var(--transition);
}

.file-list-item .file-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.file-list-item .file-name {
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--fg);
}

.file-list-item .file-info {
  font-size: 0.75rem;
  color: var(--fg-muted);
}

.file-list-item .file-info .badge {
  margin-left: 0.5rem;
}

.file-list-item .file-actions {
  display: flex;
  gap: 0.5rem;
}

.file-list-item .file-actions button {
  padding: 0.375rem 0.75rem;
  font-size: 0.75rem;
}

.file-list-item.error {
  border-color: color-mix(in srgb, var(--loss) 40%, transparent);
  background: var(--danger-dim);
}

.file-list-item.error .file-name {
  color: var(--loss);
}

.file-list-item .status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}

.file-list-item .status-dot.success { background: var(--accent); box-shadow: 0 0 8px var(--accent-glow); }
.file-list-item .status-dot.pending { background: var(--warning); }
.file-list-item .status-dot.error { background: var(--loss); }
.file-list-item .status-dot.parsing { border: 2px solid var(--accent); border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; }

.hidden {
  display: none !important;
}

.loading {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--fg-muted);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.chart-container {
  background: linear-gradient(180deg, var(--card) 0%, color-mix(in srgb, var(--card) 88%, var(--bg)) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.chart-container canvas {
  max-height: 320px;
}

.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
  overflow-x: auto;
}

.tab {
  padding: 0.65rem 1.25rem;
  background: transparent;
  border: none;
  color: var(--fg-muted);
  font-weight: 500;
  font-size: 0.875rem;
  cursor: pointer;
  border-radius: 8px;
  white-space: nowrap;
  transition: all var(--transition);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--fg);
  background: var(--bg);
}

.tab.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-bottom-color: var(--accent);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    height: auto;
    padding: 1rem 0;
    gap: 1rem;
  }

  nav ul {
    width: 100%;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .stat-card {
    padding: 1rem 0.75rem;
  }

  .stat-card .value {
    font-size: 1.25rem;
  }

  .stat-card .label {
    font-size: 0.68rem;
  }

  table {
    font-size: 0.8rem;
  }

  th, td {
    padding: 0.6rem 0.75rem;
  }

  main {
    padding: 2rem 0 2.5rem;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 0 1rem;
  }

  .file-drop-zone {
    padding: 2rem 1rem;
  }

  .file-drop-zone svg {
    width: 44px;
    height: 44px;
  }
}