:root {
  --color-navy: #0F172A;
  --color-navy-soft: #1E293B;
  --color-orange: #F97316;
  --color-orange-hover: #EA670C;
  --color-orange-soft: #FFF7ED;
  --color-bg: #F8FAFC;
  --color-bg-elevated: #F1F5F9;
  --color-surface: #FFFFFF;
  --color-border: #E2E8F0;
  --color-border-strong: #CBD5E1;
  --color-text: #0F172A;
  --color-muted: #475569;
  --color-subtle: #94A3B8;
  --color-success: #10B981;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-10: 40px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

.app-shell {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  width: 100%;
}

html, body {
  height: 100%;
  margin: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ===== Login overlay ===== */
.login-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  background-image:
    radial-gradient(circle at 20% 20%, rgba(249, 115, 22, 0.08), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(15, 23, 42, 0.06), transparent 40%);
  padding: var(--space-6);
  z-index: 100;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.login-mark {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  border-radius: 14px;
  background: var(--color-orange-soft);
  border: 1px solid #FED7AA;
  color: var(--color-orange);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-title {
  margin: 0 0 var(--space-2);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-navy);
}

.login-sub {
  margin: 0 0 var(--space-6);
  font-size: 13px;
  color: var(--color-muted);
}

.login-input {
  width: 100%;
  height: 44px;
  padding: 0 var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-bg);
  margin-bottom: var(--space-3);
  transition: border-color 150ms var(--ease-out), background-color 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}

.login-input:focus {
  outline: none;
  border-color: var(--color-orange);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.12);
}

.login-submit {
  width: 100%;
}

.login-error {
  margin: var(--space-3) 0 0;
  font-size: 13px;
  color: #DC2626;
  background: #FEF2F2;
  border: 1px solid #FECACA;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
}

/* ===== Header ===== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-8);
  background: var(--color-navy);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--color-orange);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(249, 115, 22, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-name {
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-size: 12px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.55);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.btn-ghost-dark {
  background: transparent;
  color: rgba(255, 255, 255, 0.75);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-ghost-dark:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.25);
}

.header-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

/* ===== Layout ===== */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-5);
  padding: var(--space-5) var(--space-8);
  min-height: 0;
  min-width: 0;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

.panel-header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.panel-header h2 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: -0.005em;
}

.panel-sub {
  font-size: 12px;
  color: var(--color-subtle);
  font-weight: 400;
}

.file-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 12px;
  color: var(--color-muted);
  min-width: 0;
}

.file-name {
  font-weight: 500;
  color: var(--color-navy);
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-size {
  color: var(--color-subtle);
  font-variant-numeric: tabular-nums;
}

.file-size::before {
  content: '·';
  margin-right: var(--space-2);
  color: var(--color-border-strong);
}

/* Status indicator */
.status-dot {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: 5px 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 999px;
}

.status-dot-inner {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

/* ===== Contract panel ===== */
.contract-body {
  flex: 1;
  display: flex;
  min-height: 0;
  padding: var(--space-5);
  background: var(--color-bg);
}

.upload-zone {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  border: 1.5px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
  padding: var(--space-10) var(--space-8);
  background: var(--color-surface);
  transition: border-color 200ms var(--ease-out), background-color 200ms var(--ease-out);
  cursor: pointer;
}

.upload-zone:hover {
  border-color: var(--color-orange);
  background: var(--color-orange-soft);
}

.upload-zone.is-dragover {
  border-color: var(--color-orange);
  background: var(--color-orange-soft);
  transform: scale(1.005);
}

.upload-illustration {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--color-orange-soft);
  border: 1px solid #FED7AA;
  color: var(--color-orange);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
}

.upload-title {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: -0.01em;
}

.upload-subtitle {
  margin: 0 0 var(--space-5);
  font-size: 13px;
  color: var(--color-muted);
}

.upload-hint {
  margin: var(--space-4) 0 0;
  font-size: 12px;
  color: var(--color-subtle);
}

.preview {
  flex: 1;
  display: flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #fff;
  box-shadow: var(--shadow-xs);
}

.preview iframe {
  flex: 1;
  border: 0;
  width: 100%;
  height: 100%;
  background: #fff;
}

/* ===== Chat panel ===== */
.messages {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  scroll-behavior: smooth;
}

.message {
  max-width: 88%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.55;
  animation: msg-in 280ms var(--ease-out);
}

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

.message p {
  margin: 0;
}

.message-assistant {
  align-self: flex-start;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-xs);
  position: relative;
  padding-right: 36px;
}

/* Rendered markdown inside assistant bubbles */
.message-content > *:first-child { margin-top: 0; }
.message-content > *:last-child { margin-bottom: 0; }

.message-content p {
  margin: 0 0 var(--space-3);
}

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4 {
  margin: var(--space-4) 0 var(--space-2);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--color-navy);
  line-height: 1.3;
}

.message-content h1 { font-size: 17px; }
.message-content h2 { font-size: 15px; }
.message-content h3 { font-size: 14px; }
.message-content h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-muted);
}

.message-content ul,
.message-content ol {
  margin: 0 0 var(--space-3);
  padding-left: 22px;
}

.message-content li {
  margin-bottom: 4px;
}

.message-content li > p {
  margin: 0 0 4px;
}

.message-content code {
  font-family: 'SF Mono', Menlo, Monaco, Consolas, monospace;
  font-size: 12.5px;
  background: var(--color-bg-elevated);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  color: var(--color-navy);
}

.message-content pre {
  margin: var(--space-3) 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  font-size: 12.5px;
  line-height: 1.55;
}

.message-content pre code {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.message-content a {
  color: var(--color-orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(249, 115, 22, 0.3);
  transition: border-color 150ms var(--ease-out);
  word-break: break-word;
}

.message-content a:hover {
  border-bottom-color: var(--color-orange);
}

.message-content strong {
  font-weight: 600;
  color: var(--color-navy);
}

.message-content em {
  font-style: italic;
}

.message-content blockquote {
  margin: var(--space-3) 0;
  padding: var(--space-2) var(--space-4);
  border-left: 3px solid var(--color-orange);
  background: var(--color-orange-soft);
  color: var(--color-muted);
  font-style: italic;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.message-content blockquote p:last-child { margin-bottom: 0; }

.message-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-3) 0;
  font-size: 13px;
}

.message-content th,
.message-content td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}

.message-content th {
  font-weight: 600;
  color: var(--color-navy);
  background: var(--color-bg);
  border-bottom-color: var(--color-border-strong);
}

.message-content hr {
  margin: var(--space-4) 0;
  border: 0;
  border-top: 1px solid var(--color-border);
}

/* Action row in assistant messages — holds confidence dot + copy button */
.message-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Citation pills */
.citations {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
}

.citation {
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 500;
  color: var(--color-orange);
  background: var(--color-orange-soft);
  border: 1px solid #FED7AA;
  padding: 3px 9px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: background-color 150ms var(--ease-out), border-color 150ms var(--ease-out), transform 80ms var(--ease-out);
}

.citation::before {
  content: '↗';
  font-size: 11px;
}

.citation:hover {
  background: #FFE4CC;
  border-color: var(--color-orange);
}

.citation:active {
  transform: translateY(1px);
}

/* Confidence indicator */
.confidence {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  cursor: default;
}

.confidence-marker {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.confidence-high .confidence-marker { background: var(--color-success); }
.confidence-med  .confidence-marker { background: #F59E0B; }
.confidence-low  .confidence-marker { background: #DC2626; }

.confidence-high { color: #047857; border-color: #A7F3D0; background: #ECFDF5; }
.confidence-med  { color: #92400E; border-color: #FDE68A; background: #FFFBEB; }
.confidence-low  { color: #991B1B; border-color: #FECACA; background: #FEF2F2; }

/* Copy button on assistant messages */
.message-copy {
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-subtle);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transition: opacity 150ms var(--ease-out), color 150ms var(--ease-out), background-color 150ms var(--ease-out);
}

.message-assistant:hover .message-copy,
.message-copy:focus-visible {
  opacity: 1;
}

.message-copy:hover {
  color: var(--color-navy);
  background: var(--color-bg);
}

.message-copy .message-copy-icon-done { display: none; }

.message-copy.is-copied {
  color: var(--color-success);
  opacity: 1;
}

.message-copy.is-copied .message-copy-icon-default { display: none; }
.message-copy.is-copied .message-copy-icon-done { display: block; }

.message-user {
  align-self: flex-end;
  background: var(--color-navy);
  color: #fff;
  border-bottom-right-radius: 4px;
}

/* Typing indicator */
.typing {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-xs);
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-subtle);
  animation: typing 1.2s infinite ease-in-out;
}

.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-4px); opacity: 1; }
}

/* Suggestion chips */
.suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-2);
  align-self: flex-start;
  max-width: 100%;
}

.chip {
  font-family: inherit;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--color-navy);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 150ms var(--ease-out);
}

.chip:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
  background: var(--color-orange-soft);
  transform: translateY(-1px);
}

/* Composer */
.composer {
  display: flex;
  align-items: flex-end;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
  flex-shrink: 0;
}

.composer-input {
  flex: 1;
  min-height: 44px;
  max-height: 140px;
  padding: 11px var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  resize: none;
  overflow-y: auto;
  transition: border-color 150ms var(--ease-out), background-color 150ms var(--ease-out), box-shadow 150ms var(--ease-out);
}

.composer-input::placeholder {
  color: var(--color-subtle);
}

.composer-input:focus {
  outline: none;
  border-color: var(--color-orange);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.12);
}

.composer-send {
  width: 44px;
  padding: 0;
  flex-shrink: 0;
}

.composer-send:disabled {
  background: var(--color-border-strong);
  cursor: not-allowed;
}

.composer-send:disabled:hover {
  background: var(--color-border-strong);
}

.composer-send.is-loading {
  background: var(--color-orange);
  cursor: progress;
  opacity: 1;
}

.composer-send.is-loading svg { display: none; }

.composer-send.is-loading::after {
  content: '';
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

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

/* ===== Toasts ===== */
.toasts {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: 360px;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  font-size: 13px;
  line-height: 1.45;
  color: var(--color-text);
  animation: toast-in 220ms var(--ease-out);
}

.toast.is-leaving {
  animation: toast-out 180ms var(--ease-out) forwards;
}

.toast-icon {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-body {
  flex: 1;
  min-width: 0;
}

.toast-close {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--color-subtle);
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 150ms var(--ease-out), background-color 150ms var(--ease-out);
}

.toast-close:hover {
  color: var(--color-navy);
  background: var(--color-bg);
}

.toast-error {
  border-color: #FECACA;
  background: #FEF2F2;
  color: #991B1B;
}

.toast-error .toast-icon { color: #DC2626; }
.toast-error .toast-close { color: rgba(153, 27, 27, 0.6); }
.toast-error .toast-close:hover { color: #991B1B; background: rgba(220, 38, 38, 0.08); }

.toast-warn {
  border-color: #FED7AA;
  background: var(--color-orange-soft);
  color: #9A3412;
}

.toast-warn .toast-icon { color: var(--color-orange); }

.toast-info .toast-icon { color: var(--color-orange); }

@keyframes toast-in {
  from { transform: translateY(8px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes toast-out {
  from { transform: translateY(0); opacity: 1; }
  to { transform: translateY(8px); opacity: 0; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 44px;
  padding: 0 var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: background-color 150ms var(--ease-out), transform 80ms var(--ease-out), border-color 150ms var(--ease-out), color 150ms var(--ease-out);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--color-orange);
  color: #fff;
  box-shadow: 0 1px 2px rgba(234, 88, 12, 0.2);
}

.btn-primary:hover {
  background: var(--color-orange-hover);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-orange);
  outline-offset: 2px;
}

.btn-ghost {
  height: 32px;
  padding: 0 var(--space-3);
  font-size: 12.5px;
  background: transparent;
  color: var(--color-muted);
  border-color: var(--color-border);
}

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

/* ===== Scrollbars ===== */
.messages::-webkit-scrollbar,
.composer-input::-webkit-scrollbar {
  width: 8px;
}

.messages::-webkit-scrollbar-track,
.composer-input::-webkit-scrollbar-track {
  background: transparent;
}

.messages::-webkit-scrollbar-thumb,
.composer-input::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 999px;
  border: 2px solid var(--color-surface);
}

.messages::-webkit-scrollbar-thumb:hover,
.composer-input::-webkit-scrollbar-thumb:hover {
  background: var(--color-subtle);
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  body {
    overflow: auto;
  }

  .layout {
    grid-template-columns: 1fr;
    padding: var(--space-4);
    gap: var(--space-4);
  }

  .panel {
    min-height: 480px;
  }

  .app-header {
    padding: var(--space-3) var(--space-4);
  }
}