:root {
  --primary: #2F6F4F;
  --primary-hover: #285F44;
  --dark: #163828;
  --background: #F6F8F7;
  --card: #FFFFFF;
  --border: #DCE5DF;
  --text: #1F2937;
  --muted: #6B7280;
  --soft-green: #E5F3EA;
  --warning: #D97706;
  --danger: #DC2626;
  --info: #2563EB;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: var(--background);
  color: var(--text);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  border: 0;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: #FFFFFF;
  color: var(--text);
}

textarea {
  resize: vertical;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: 700;
  font-size: 14px;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.app-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 20px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-weight: 800;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.app-header h1 {
  margin: 0;
  font-size: 34px;
  line-height: 1.15;
}

.header-desc {
  margin: 8px 0 0;
  color: var(--muted);
  max-width: 680px;
  line-height: 1.55;
}

.project-summary-panel,
.panel,
.table-panel,
.ai-output-panel,
.summary-card,
.mini-stat {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
}

.project-summary-panel {
  padding: 18px;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 18px;
  margin-bottom: 18px;
}

.project-selector {
  background: var(--soft-green);
  border-radius: 14px;
  padding: 16px;
}

.project-selector label {
  color: var(--primary);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.summary-card {
  padding: 16px;
}

.summary-card span,
.mini-stat span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.summary-card strong,
.mini-stat strong {
  display: block;
  font-size: 28px;
  line-height: 1;
}

.summary-card small {
  display: block;
  margin-top: 8px;
  color: var(--muted);
}

.tab-nav {
  display: flex;
  gap: 8px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 22px;
  overflow-x: auto;
}

.tab-btn {
  background: transparent;
  color: var(--muted);
  padding: 14px 16px;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  font-weight: 700;
}

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.section-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-header h2 {
  margin: 0 0 6px;
  font-size: 24px;
}

.section-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.panel {
  padding: 20px;
  margin-bottom: 22px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-grid.four-cols {
  grid-template-columns: repeat(4, 1fr);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin: 10px 0 18px;
}

.checkbox-grid label {
  font-weight: 400;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #FFFFFF;
  margin: 0;
}

.checkbox-grid input {
  width: auto;
  margin-right: 6px;
}

.primary-btn,
.secondary-btn,
.danger-btn {
  border-radius: 12px;
  padding: 12px 16px;
  cursor: pointer;
  font-weight: 800;
}

.primary-btn {
  background: var(--primary);
  color: #FFFFFF;
}

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

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

.secondary-btn:hover {
  background: #F1F5F3;
}

.danger-btn {
  background: #FFFFFF;
  color: var(--danger);
  border: 1px solid rgba(220, 38, 38, 0.28);
}

.danger-btn:hover {
  background: #FEF2F2;
}

.full-btn {
  width: 100%;
}

.result-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.result-toolbar h3 {
  margin: 0;
}

.result-toolbar p {
  margin: 0;
  color: var(--muted);
}

.result-list {
  display: grid;
  gap: 14px;
}

.empty-state {
  background: #FFFFFF;
  border: 1px dashed var(--border);
  border-radius: 16px;
  padding: 26px;
  color: var(--muted);
  text-align: center;
}

.empty-state.small {
  padding: 16px;
  font-size: 14px;
}

.mini-stat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}

.mini-stat {
  padding: 16px;
}

.table-panel {
  overflow: hidden;
}

.table-responsive {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #FFFFFF;
}

th,
td {
  padding: 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}

th {
  color: var(--muted);
  font-size: 13px;
  background: #FAFCFB;
}

.table-empty {
  text-align: center;
  color: var(--muted);
  padding: 28px;
}

.filter-row {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 12px;
  margin-bottom: 16px;
}

.ai-output-panel {
  padding: 20px;
}

.ai-output {
  min-height: 180px;
  background: #FAFCFB;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  color: var(--muted);
  white-space: pre-wrap;
  line-height: 1.6;
}

.hidden {
  display: none;
}

/* Toast */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 5000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(360px, calc(100vw - 40px));
}

.toast {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-left: 5px solid var(--primary);
  border-radius: 14px;
  padding: 14px;
  color: var(--text);
  font-size: 14px;
}

.toast.error {
  border-left-color: var(--danger);
}

.toast.warning {
  border-left-color: var(--warning);
}

.toast.info {
  border-left-color: var(--info);
}

.toast-close {
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  padding: 0;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 4000;
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
}

.modal-card {
  position: relative;
  width: 100%;
  max-width: 520px;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 22px;
  z-index: 1;
}

.large-modal {
  max-width: 960px;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.modal-header h3 {
  margin: 0 0 6px;
  font-size: 22px;
}

.modal-header p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.icon-btn {
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 26px;
  line-height: 1;
}

.project-modal-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 18px;
}

.project-list {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.project-form-panel {
  display: grid;
  gap: 14px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-start;
  margin-top: 4px;
}

@media (max-width: 960px) {
  .project-summary-panel {
    grid-template-columns: 1fr;
  }

  .summary-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-modal-grid {
    grid-template-columns: 1fr;
  }

  .form-grid.four-cols {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 24px, 1180px);
    padding-top: 20px;
  }

  .app-header {
    flex-direction: column;
  }

  .app-header h1 {
    font-size: 28px;
  }

  .summary-grid,
  .mini-stat-grid,
  .form-grid,
  .form-grid.four-cols,
  .filter-row {
    grid-template-columns: 1fr;
  }

  .checkbox-grid {
    grid-template-columns: 1fr 1fr;
  }

  .section-header,
  .result-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .primary-btn,
  .secondary-btn,
  .danger-btn {
    width: 100%;
  }

  .modal-actions {
    flex-direction: column;
  }
}

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

  .toast-container {
    top: 12px;
    right: 12px;
    left: 12px;
    width: auto;
  }
}

.project-list-item {
  width: 100%;
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  text-align: left;
  cursor: pointer;
  color: var(--text);
  font-weight: 700;
}

.project-list-item:hover,
.project-list-item.active {
  background: var(--soft-green);
  border-color: var(--primary);
  color: var(--primary);
}