/* PDMI Knowledge Builder - MVP 0.1
   Plain CSS, no build step, no framework. */

:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-text: #1f2430;
  --color-muted: #6b7280;
  --color-border: #e2e5ea;
  --color-primary: #2f6f4f;
  --color-primary-dark: #1f4d37;
  --color-accent: #c05621;
  --color-danger: #b3261e;
  --color-pending: #9a7b00;
  --color-accepted: #1f7a3d;
  --color-rejected: #b3261e;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.container {
  max-width: 840px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.container-wide {
  max-width: 1200px;
}

/* Header / footer */

.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
  margin-bottom: 32px;
}

.header-inner {
  display: flex;
  align-items: center;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  text-decoration: none;
}

.site-footer {
  margin-top: 60px;
  padding: 20px 0;
  color: var(--color-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* Workflow steps nav */

.workflow-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 28px;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.workflow-step {
  color: var(--color-muted);
  text-decoration: none;
  font-size: 0.9rem;
  padding: 4px 8px;
  border-radius: 6px;
}

.workflow-step:hover {
  background: var(--color-bg);
}

.workflow-step-active {
  color: var(--color-primary-dark);
  font-weight: 700;
  background: #eaf3ee;
}

.workflow-arrow {
  color: var(--color-border);
}

/* Hero */

.hero {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 40px;
  text-align: center;
}

.hero h1 {
  margin-top: 0;
}

.hero p {
  color: var(--color-muted);
  max-width: 560px;
  margin: 0 auto 20px;
}

/* Buttons */

.button {
  display: inline-block;
  padding: 10px 20px;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
}

.button-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.button-primary:hover {
  background: var(--color-primary-dark);
}

.button-secondary {
  background: var(--color-surface);
  color: var(--color-primary-dark);
  border-color: var(--color-primary);
}

.btn {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 6px;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 0.82rem;
}

.btn-small {
  margin: 2px;
}

.btn-accept {
  border-color: var(--color-accepted);
  color: var(--color-accepted);
}

.btn-reject {
  border-color: var(--color-rejected);
  color: var(--color-rejected);
}

.btn-edit {
  border-color: var(--color-muted);
  color: var(--color-text);
}

.btn-save {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
}

.btn-undo,
.btn-cancel {
  color: var(--color-muted);
}

/* Forms */

.stacked-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 640px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.stacked-form label {
  font-weight: 600;
  margin-top: 10px;
}

.stacked-form input[type="text"],
.stacked-form input[type="file"],
.stacked-form textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
}

.stacked-form textarea {
  resize: vertical;
}

.stacked-form .button {
  align-self: flex-start;
  margin-top: 16px;
}

.field-hint {
  color: var(--color-muted);
  font-size: 0.82rem;
  margin: 2px 0 0;
}

.field-hint-strong {
  color: var(--color-text);
  font-weight: 600;
}

.api-key-field {
  display: flex;
  gap: 8px;
  align-items: stretch;
}

.api-key-field input {
  flex: 1 1 auto;
}

.api-key-field .btn {
  flex: 0 0 auto;
}

.or-divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--color-muted);
  margin: 12px 0;
}

.or-divider::before,
.or-divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--color-border);
}

.or-divider span {
  padding: 0 12px;
}

/* Alerts */

.alert {
  padding: 14px 16px;
  border-radius: var(--radius);
  margin-bottom: 20px;
  font-size: 0.92rem;
}

.alert-error {
  background: #fdecea;
  color: var(--color-danger);
  border: 1px solid #f3c6c2;
}

.alert-error ul {
  margin: 0;
  padding-left: 18px;
}

.alert-info {
  background: #eef4ff;
  color: #1e429f;
  border: 1px solid #c7d7f5;
}

/* Project list */

.project-table,
.review-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.project-table th,
.project-table td,
.review-table th,
.review-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
  font-size: 0.9rem;
}

.project-table th,
.review-table th {
  background: #fafbfc;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-muted);
}

.project-actions a {
  margin-right: 10px;
  color: var(--color-primary-dark);
}

.status-pill {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #eef0f3;
  color: var(--color-text);
}

.status-pending {
  background: #fff6e0;
  color: var(--color-pending);
}

.status-accepted {
  background: #e6f6ea;
  color: var(--color-accepted);
}

.status-rejected {
  background: #fbe8e7;
  color: var(--color-rejected);
}

.empty-state {
  color: var(--color-muted);
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
}

/* Review table specifics */

.type-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 7px;
  border-radius: 999px;
  background: #eef0f3;
  color: var(--color-muted);
  font-size: 0.72rem;
  vertical-align: middle;
}

.relationship-badge {
  font-weight: 600;
  color: var(--color-primary-dark);
}

.rel-row .edit-value {
  display: none;
  width: 100%;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.85rem;
  margin-top: 4px;
}

.rel-row.editing .display-value,
.rel-row.editing .type-badge {
  display: none;
}

.rel-row.editing .edit-value {
  display: block;
}

.rel-row .btn-save,
.rel-row .btn-cancel {
  display: none;
}

.rel-row.editing .btn-save,
.rel-row.editing .btn-cancel {
  display: inline-block;
}

.rel-row.editing .btn-accept,
.rel-row.editing .btn-reject,
.rel-row.editing .btn-edit,
.rel-row.editing .btn-undo,
.rel-row.editing .btn-reverse {
  display: none;
}

.rel-row .btn-undo {
  display: none;
}

.rel-row.rel-status-accepted .btn-accept,
.rel-row.rel-status-rejected .btn-reject {
  display: none;
}

.rel-row.rel-status-accepted .btn-undo,
.rel-row.rel-status-rejected .btn-undo {
  display: inline-block;
}

.row-error {
  color: var(--color-danger);
  font-size: 0.78rem;
  margin-top: 6px;
}

.cell-evidence {
  max-width: 260px;
}

/* Review warnings - advisory only, never blocking. These flag a row for a
   closer look; they never delete, hide, or prevent acting on a row. */

.rel-row.rel-flagged {
  background: #fffaf0;
}

.rel-row.rel-flagged:hover {
  background: #fff3dc;
}

.validation-warning {
  margin-top: 8px;
  padding: 8px 10px;
  border-radius: 6px;
  background: #fff3dc;
  border: 1px solid #f2c96b;
  color: #7a5b00;
  font-size: 0.78rem;
  line-height: 1.4;
}

.entity-warning {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 8px;
  border-radius: 999px;
  background: #fff3dc;
  border: 1px solid #f2c96b;
  color: #7a5b00;
  font-size: 0.72rem;
  vertical-align: middle;
}

.btn-reverse {
  border-color: #7a5b00;
  color: #7a5b00;
}

/* Evidence stance badges */

.stance-badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.76rem;
  font-weight: 600;
}

.stance-supports {
  background: #e6f6ea;
  color: var(--color-accepted);
}

.stance-contradicts {
  background: #fbe8e7;
  color: var(--color-rejected);
}

.stance-unclear {
  background: #eef0f3;
  color: var(--color-muted);
}

.cell-claim-basis-label {
  display: none;
  font-size: 0.74rem;
  color: var(--color-muted);
  margin-top: 6px;
  font-weight: 400;
}

.rel-row.editing .cell-claim-basis-label {
  display: block;
}

.cell-claim-basis {
  margin-top: 2px;
}

/* Graph */

.graph-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  padding: 12px 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.graph-controls label {
  font-weight: 600;
  font-size: 0.85rem;
}

.graph-controls input[type="text"] {
  flex: 1 1 220px;
  min-width: 160px;
  padding: 7px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 0.88rem;
}

.graph-layout {
  display: flex;
  gap: 16px;
  align-items: stretch;
}

.graph-canvas {
  flex: 1 1 auto;
  height: 560px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.graph-detail {
  flex: 0 0 300px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  font-size: 0.9rem;
}

.graph-detail h3 {
  margin-top: 0;
}

.graph-detail blockquote {
  margin: 6px 0;
  padding: 8px 12px;
  background: var(--color-bg);
  border-left: 3px solid var(--color-primary);
  font-style: italic;
}

.graph-detail-placeholder {
  color: var(--color-muted);
}

/* Export */

.export-options {
  display: flex;
  gap: 12px;
}

/* Responsive */

@media (max-width: 720px) {
  .graph-layout {
    flex-direction: column;
  }

  .graph-canvas {
    height: 400px;
  }

  .graph-detail {
    flex-basis: auto;
  }

  .review-table,
  .review-table thead {
    display: block;
    overflow-x: auto;
  }
}