/* ============================================
   IRA Software Platform — Design System
   Style: Modern & Minimal (Linear/Notion)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* --- Scrollbars --- */
* { scrollbar-width: thin; scrollbar-color: #333 #1a1a1a; }
*::-webkit-scrollbar { width: 6px; height: 6px; }
*::-webkit-scrollbar-track { background: #1a1a1a; }
*::-webkit-scrollbar-thumb { background: #333; border-radius: 3px; }
*::-webkit-scrollbar-thumb:hover { background: #444; }

/* --- Tokens --- */
:root {
  --bg-primary: #1a1a1a;
  --bg-sidebar: #242424;
  --bg-card: #2e2e2e;
  --bg-input: #2e2e2e;
  --bg-hover: #353535;
  --bg-modal-overlay: rgba(0, 0, 0, 0.6);

  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-subtle: rgba(59, 130, 246, 0.12);

  --text-primary: #f5f5f5;
  --text-muted: #a0a0a0;
  --text-dim: #6b6b6b;

  --border: #333333;
  --border-focus: #3b82f6;
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;

  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --orange: #f97316;

  --sidebar-width: 240px;
  --topbar-height: 56px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 150ms ease;
}

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

html, body {
  height: 100%;
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button {
  font-family: var(--font);
  cursor: pointer;
  border: none;
  outline: none;
}

input, select, textarea {
  font-family: var(--font);
  font-size: 14px;
  outline: none;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* --- Typography --- */
.t-h1 { font-size: 24px; font-weight: 700; letter-spacing: -0.5px; }
.t-h2 { font-size: 18px; font-weight: 600; letter-spacing: -0.3px; }
.t-h3 { font-size: 15px; font-weight: 600; }
.t-body { font-size: 14px; font-weight: 400; }
.t-small { font-size: 12px; font-weight: 400; color: var(--text-muted); }
.t-muted { color: var(--text-muted); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 16px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background var(--transition), opacity var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; }

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-hover); }

.btn-danger {
  background: transparent;
  color: var(--red);
  border: 1px solid var(--red);
}
.btn-danger:hover { background: rgba(239, 68, 68, 0.1); }

.btn-sm { height: 30px; padding: 0 10px; font-size: 12px; }
.btn-icon { width: 36px; padding: 0; }
.btn-icon.btn-sm { width: 30px; }

/* --- Inputs --- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

.input {
  height: 40px;
  padding: 0 12px;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}

.input:focus {
  border-color: var(--border-focus);
}

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

select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23a0a0a0' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

/* --- Stat Cards --- */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-card .stat-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-card .stat-value {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--text-primary);
}

.stat-card .stat-sub {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

/* --- Tables --- */
.table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  padding: 12px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-sidebar);
}

tbody td {
  padding: 12px 16px;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
}

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

tbody tr:hover {
  background: var(--bg-hover);
}

/* --- Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 0 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 9999px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge-green  { color: var(--green);  background: rgba(34,197,94,0.12);  }
.badge-green::before  { background: var(--green); }
.badge-red    { color: var(--red);    background: rgba(239,68,68,0.12);  }
.badge-red::before    { background: var(--red); }
.badge-gray   { color: var(--text-muted); background: rgba(160,160,160,0.12); }
.badge-gray::before   { background: var(--text-muted); }
.badge-yellow { color: var(--yellow); background: rgba(234,179,8,0.12);  }
.badge-yellow::before { background: var(--yellow); }

/* --- Layout: App Shell --- */
.app-layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

/* --- Sidebar --- */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-logo {
  padding: 20px 20px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo .wordmark {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.sidebar-logo .wordmark span {
  color: var(--accent);
}

.sidebar-logo .sub {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}

.sidebar-nav {
  padding: 12px 8px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-section-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding: 16px 12px 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.nav-link.active {
  color: var(--text-primary);
  background: var(--accent-subtle);
}

.nav-link .nav-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.6;
}

.nav-link.active .nav-icon {
  opacity: 1;
}

.sidebar-footer {
  padding: 12px 8px;
  border-top: 1px solid var(--border);
}

/* --- Topbar --- */
.topbar {
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-primary);
}

.topbar-title {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.3px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.topbar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}

.topbar-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
}

.topbar-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
}

/* --- Main Content --- */
.main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.main-content {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

/* --- Page Header --- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-header h2 {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
}

/* --- Stats Grid --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-modal-overlay);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 480px;
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 15px;
  font-weight: 600;
}

.modal-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  background: transparent;
  transition: all var(--transition);
  font-size: 18px;
}

.modal-close:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}

/* --- Dropzone --- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

.dropzone .dz-icon {
  font-size: 32px;
  margin-bottom: 8px;
  opacity: 0.4;
}

.dropzone .dz-label {
  font-size: 13px;
  color: var(--text-muted);
}

.dropzone .dz-label strong {
  color: var(--accent);
}

.dropzone .dz-hint {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 4px;
}

.dropzone.has-file {
  border-style: solid;
  border-color: var(--green);
  background: rgba(34, 197, 94, 0.06);
}

.dropzone.has-file .dz-label {
  color: var(--green);
}

/* --- Alerts --- */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
}

.alert-error {
  background: rgba(239, 68, 68, 0.1);
  color: var(--red);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-success {
  background: rgba(34, 197, 94, 0.1);
  color: var(--green);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

.empty-state .empty-icon {
  font-size: 40px;
  opacity: 0.3;
  margin-bottom: 12px;
}

.empty-state p {
  font-size: 14px;
  margin-bottom: 16px;
}

/* --- Spinner --- */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* --- Activity List --- */
.activity-list {
  display: flex;
  flex-direction: column;
}

.activity-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}

.activity-text {
  font-size: 13px;
  color: var(--text-muted);
  flex: 1;
}

.activity-text strong {
  color: var(--text-primary);
  font-weight: 500;
}

.activity-time {
  font-size: 11px;
  color: var(--text-dim);
  white-space: nowrap;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    left: -260px;
    z-index: 900;
    transition: left var(--transition);
  }
  .sidebar.open { left: 0; }

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

  .topbar { padding: 0 16px; }
  .main-content { padding: 16px; }
}

/* --- Utility --- */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.w-full { width: 100%; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; }