/* ═══════════════════════════════════════════════════════════════════════════
   Relu — Shared App Styles
   Design: Light mode, Inter font, #FAFAF8 background, minimal decoration
   ═══════════════════════════════════════════════════════════════════════════ */

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

:root {
  --bg: #FAFAF8;
  --surface: #FFFFFF;
  --surface-hover: #F7F7F5;
  --text: #111111;
  --text-2: #444444;
  --text-3: #666666;
  --text-4: #999999;
  --border: #E5E4E1;
  --border-light: #F0EFEC;
  --red: #B91C1C;
  --red-bg: #FEF2F2;
  --red-border: #FECACA;
  --green: #166534;
  --green-bg: #F0FDF4;
  --green-border: #BBF7D0;
  --amber: #92400E;
  --amber-bg: #FFFBEB;
  --amber-border: #FDE68A;
  --blue: #1E40AF;
  --blue-bg: #EFF6FF;
  --blue-border: #BFDBFE;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Layout ── */
.app-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

.app-narrow {
  max-width: 560px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Nav ── */
.app-nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  padding: 0.875rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(250, 250, 248, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.app-nav .logo {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--text);
  text-decoration: none;
}

.app-nav .nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-nav .nav-link {
  font-size: 0.85rem;
  color: var(--text-3);
  text-decoration: none;
  transition: color 0.15s;
}
.app-nav .nav-link:hover { color: var(--text); }

.app-nav .nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--text);
  color: var(--bg);
  text-decoration: none;
  border: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s;
}
.app-nav .nav-btn:hover { opacity: 0.8; }

/* ── Page Header ── */
.page-header {
  padding-top: 6.5rem;
  padding-bottom: 2.5rem;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.page-header p {
  color: var(--text-2);
  font-size: 0.95rem;
}

/* ── Cards ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
}

.card-sm { padding: 1.25rem; }

/* ── Forms ── */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 0.4rem;
}

.form-input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  transition: border-color 0.15s;
}
.form-input:focus {
  outline: none;
  border-color: var(--text);
}

.form-input::placeholder { color: var(--text-4); }

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

select.form-input {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 8L1 3h10z' fill='%23666'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}

.form-hint {
  font-size: 0.75rem;
  color: var(--text-4);
  margin-top: 0.3rem;
}

/* ── File Upload ── */
.file-upload {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.15s;
  background: var(--surface);
}
.file-upload:hover, .file-upload.dragover {
  border-color: var(--text-3);
  background: var(--surface-hover);
}
.file-upload.has-file {
  border-color: var(--green);
  border-style: solid;
  background: var(--green-bg);
}

.file-upload-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.file-upload-text {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: 0.25rem;
}

.file-upload-hint {
  font-size: 0.78rem;
  color: var(--text-4);
}

.file-upload input[type="file"] {
  display: none;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.4rem;
  border: none;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--text);
  color: var(--bg);
}
.btn-primary:hover { opacity: 0.85; }
.btn-primary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--surface-hover); }

.btn-danger {
  background: var(--red-bg);
  color: var(--red);
  border: 1px solid var(--red-border);
}
.btn-danger:hover { opacity: 0.85; }

.btn-success {
  background: var(--green-bg);
  color: var(--green);
  border: 1px solid var(--green-border);
}
.btn-success:hover { opacity: 0.85; }

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.8rem;
  border-radius: 7px;
}

.btn-full { width: 100%; }

/* ── Badges ── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.badge-red { background: var(--red-bg); color: var(--red); }
.badge-green { background: var(--green-bg); color: var(--green); }
.badge-amber { background: var(--amber-bg); color: var(--amber); }
.badge-blue { background: var(--blue-bg); color: var(--blue); }
.badge-gray { background: var(--border-light); color: var(--text-3); }

/* ── Stats Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-card .stat-label {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 0.2rem;
}

/* ── Table ── */
.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.data-table th {
  text-align: left;
  padding: 0.85rem 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-light);
  vertical-align: middle;
}

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

.data-table tr:hover td { background: var(--surface-hover); }

.data-table .clickable { cursor: pointer; }

/* ── Risk Score ── */
.risk-score {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
}
.risk-score.risk-low { background: var(--green-bg); color: var(--green); }
.risk-score.risk-medium { background: var(--amber-bg); color: var(--amber); }
.risk-score.risk-high { background: var(--red-bg); color: var(--red); }

/* ── Clause Card (Analysis Output) ── */
.clause-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.clause-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.875rem;
  gap: 0.75rem;
}

.clause-title {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.clause-original {
  font-size: 0.85rem;
  line-height: 1.75;
  padding: 0.75rem;
  padding-left: 1rem;
  border-left: 3px solid var(--red-border);
  background: var(--red-bg);
  border-radius: 0 6px 6px 0;
  margin-bottom: 0.75rem;
  color: var(--text-2);
}

.clause-original .del {
  color: var(--red);
  text-decoration: line-through;
}

.clause-suggested {
  font-size: 0.85rem;
  line-height: 1.75;
  padding: 0.75rem;
  padding-left: 1rem;
  border-left: 3px solid var(--green-border);
  background: var(--green-bg);
  border-radius: 0 6px 6px 0;
  margin-bottom: 0.75rem;
  color: var(--text-2);
}

.clause-suggested .add {
  color: var(--green);
  font-weight: 500;
}

.clause-comment {
  font-size: 0.82rem;
  background: var(--amber-bg);
  color: var(--amber);
  padding: 0.6rem 0.85rem;
  border-radius: 6px;
  line-height: 1.55;
  margin-bottom: 0.5rem;
}

.clause-legal {
  font-size: 0.75rem;
  color: var(--text-4);
  font-style: italic;
  margin-top: 0.5rem;
}

/* ── Summary Box ── */
.summary-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.summary-box h3 {
  font-size: 0.82rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-3);
  margin-bottom: 0.75rem;
}

.summary-box p, .summary-box li {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--text-2);
}

.summary-box ul {
  list-style: none;
  padding: 0;
}

.summary-box ul li {
  padding: 0.3rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.summary-box ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--text-4);
}

/* ── Missing Clause ── */
.missing-clause {
  background: var(--blue-bg);
  border: 1px solid var(--blue-border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 0.875rem;
}

.missing-clause h4 {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 0.4rem;
}

.missing-clause p {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.6;
}

.missing-clause .suggested-text {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--surface);
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.7;
  border: 1px solid var(--blue-border);
}

/* ── Alerts ── */
.alert {
  padding: 0.85rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 1rem;
}

.alert-success { background: var(--green-bg); color: var(--green); border: 1px solid var(--green-border); }
.alert-error { background: var(--red-bg); color: var(--red); border: 1px solid var(--red-border); }
.alert-info { background: var(--blue-bg); color: var(--blue); border: 1px solid var(--blue-border); }
.alert-warning { background: var(--amber-bg); color: var(--amber); border: 1px solid var(--amber-border); }

/* ── Loading ── */
.spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-top-color: var(--text);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(250, 250, 248, 0.7);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  flex-direction: column;
  gap: 1rem;
}

.loading-text {
  font-size: 0.9rem;
  color: var(--text-2);
}

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-3);
}

.empty-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.4;
}

.empty-state h3 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: 0.3rem;
}

.empty-state p {
  font-size: 0.85rem;
}

/* ── Contract Detail Layout ── */
.contract-meta {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.meta-item .meta-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}

.meta-item .meta-value {
  font-size: 0.92rem;
  font-weight: 500;
  margin-top: 0.15rem;
}

/* ── Actions Bar ── */
.actions-bar {
  display: flex;
  gap: 0.75rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--border);
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* ── Status timeline ── */
.status-steps {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
}

.status-step {
  flex: 1;
  text-align: center;
  position: relative;
  padding-top: 2rem;
}

.status-step::before {
  content: '';
  position: absolute;
  top: 0.75rem;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--border);
}

.status-step:first-child::before { left: 50%; }
.status-step:last-child::before { right: 50%; }

.status-step .step-dot {
  position: absolute;
  top: 0.25rem;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--border);
  border: 2px solid var(--bg);
  z-index: 1;
}

.status-step.active .step-dot { background: var(--text); }
.status-step.done .step-dot { background: var(--green); }

.status-step .step-label {
  font-size: 0.72rem;
  color: var(--text-4);
  font-weight: 500;
}
.status-step.active .step-label, .status-step.done .step-label { color: var(--text-2); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .app-nav { padding: 0.75rem 1.25rem; }
  .app-wrap, .app-narrow { padding: 0 1.25rem; }
  .page-header { padding-top: 5.5rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .data-table { font-size: 0.8rem; }
  .data-table th, .data-table td { padding: 0.65rem 0.65rem; }
  .contract-meta { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .page-header h1 { font-size: 1.4rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .status-steps { flex-wrap: wrap; gap: 0.5rem; }
  .status-step::before { display: none; }
}

/* ── Utility ── */
.hidden { display: none !important; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-muted { color: var(--text-3); }
.text-sm { font-size: 0.82rem; }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }