@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --black: #0A0A0A;
  --white: #FFFFFF;
  --green: #25D366;
  --green-dark: #1da851;
  --gray: #F5F5F5;
  --gray-200: #E5E5E5;
  --gray-300: #D4D4D4;
  --gray-400: #A3A3A3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --red: #EF4444;
  --yellow: #F59E0B;
  --blue: #3B82F6;
  --sidebar-w: 260px;
  --sidebar-collapsed: 0px;
  --header-h: 64px;
}

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

body {
  font-family: 'Inter', sans-serif;
  background: var(--gray);
  color: var(--black);
  min-height: 100vh;
}

/* ===== LOGIN ===== */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: var(--black);
}

.login-box {
  background: var(--white);
  border-radius: 16px;
  padding: 48px 40px;
  width: 100%;
  max-width: 420px;
  margin: 16px;
}

.login-box .logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-box .logo h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--black);
}

.login-box .logo h1 span {
  color: var(--green);
}

.login-box .logo p {
  color: var(--gray-500);
  font-size: 14px;
  margin-top: 4px;
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font-size: 14px;
  font-family: 'Inter', sans-serif;
  transition: border-color .2s;
  background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(37,211,102,.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: all .2s;
}

.btn-primary {
  background: var(--green);
  color: var(--white);
}

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

.btn-secondary {
  background: var(--gray);
  color: var(--black);
  border: 1px solid var(--gray-300);
}

.btn-secondary:hover { background: var(--gray-200); }

.btn-danger {
  background: var(--red);
  color: var(--white);
}

.btn-danger:hover { opacity: .9; }

.btn-sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn-block { width: 100%; }

.link-btn {
  background: none;
  border: none;
  color: var(--green);
  font-size: 13px;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
}

.link-btn:hover { text-decoration: underline; }

/* ===== LAYOUT ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-w);
  background: var(--black);
  color: var(--white);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: transform .3s;
}

.sidebar-brand {
  padding: 24px 20px;
  border-bottom: 1px solid var(--gray-700);
}

.sidebar-brand h2 {
  font-size: 20px;
  font-weight: 700;
}

.sidebar-brand h2 span { color: var(--green); }

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  color: var(--gray-400);
  text-decoration: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: all .2s;
}

.sidebar-nav a:hover {
  background: var(--gray-700);
  color: var(--white);
}

.sidebar-nav a.active {
  background: var(--green);
  color: var(--white);
}

.sidebar-nav a svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--gray-700);
}

.sidebar-footer .user-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-footer .user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--green);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  color: var(--white);
}

.sidebar-footer .user-name {
  font-size: 14px;
  font-weight: 500;
}

.sidebar-footer .user-role {
  font-size: 12px;
  color: var(--gray-500);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  transition: margin-left .3s;
}

.header {
  height: var(--header-h);
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-left h1 {
  font-size: 20px;
  font-weight: 600;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle svg { width: 24px; height: 24px; }

.header-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.page-content {
  padding: 32px;
}

/* ===== CARDS ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}

.stat-card {
  background: var(--white);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--gray-200);
}

.stat-card .stat-label {
  font-size: 13px;
  color: var(--gray-500);
  font-weight: 500;
  margin-bottom: 8px;
}

.stat-card .stat-value {
  font-size: 28px;
  font-weight: 700;
}

.stat-card .stat-change {
  font-size: 12px;
  margin-top: 4px;
}

.stat-card .stat-change.up { color: var(--green); }
.stat-card .stat-change.down { color: var(--red); }

/* ===== TABLE ===== */
.card {
  background: var(--white);
  border-radius: 12px;
  border: 1px solid var(--gray-200);
  overflow: hidden;
  margin-bottom: 24px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.card-header h3 {
  font-size: 16px;
  font-weight: 600;
}

.card-body { padding: 24px; }

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

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

table th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: .5px;
  background: var(--gray);
  border-bottom: 1px solid var(--gray-200);
}

table td {
  padding: 14px 16px;
  font-size: 14px;
  border-bottom: 1px solid var(--gray-200);
}

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

table tr:hover { background: var(--gray); }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

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

.badge-green { background: #dcfce7; color: #166534; }
.badge-green::before { background: #22c55e; }

.badge-yellow { background: #fef9c3; color: #854d0e; }
.badge-yellow::before { background: #eab308; }

.badge-red { background: #fee2e2; color: #991b1b; }
.badge-red::before { background: #ef4444; }

.badge-blue { background: #dbeafe; color: #1e40af; }
.badge-blue::before { background: #3b82f6; }

.badge-gray { background: #f3f4f6; color: #374151; }
.badge-gray::before { background: #9ca3af; }

/* ===== MODAL ===== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-overlay.active { display: flex; }

.modal {
  background: var(--white);
  border-radius: 16px;
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--gray-200);
}

.modal-header h3 { font-size: 18px; font-weight: 600; }

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  color: var(--gray-500);
}

.modal-close:hover { color: var(--black); }

.modal-body { padding: 24px; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 16px 24px;
  border-top: 1px solid var(--gray-200);
}

/* ===== PROGRESS BAR ===== */
.progress-bar {
  height: 8px;
  background: var(--gray-200);
  border-radius: 4px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--green);
  border-radius: 4px;
  transition: width .3s;
}

/* ===== CHART ===== */
.chart-container {
  position: relative;
  height: 280px;
}

/* ===== PREVIEW TEMPLATE ===== */
.template-preview {
  background: #e5ddd5;
  border-radius: 12px;
  padding: 24px;
  min-height: 120px;
}

.template-bubble {
  background: var(--white);
  border-radius: 8px 8px 8px 0;
  padding: 12px 16px;
  max-width: 320px;
  font-size: 14px;
  line-height: 1.5;
  box-shadow: 0 1px 2px rgba(0,0,0,.1);
  word-wrap: break-word;
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-500);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin-bottom: 16px;
  opacity: .4;
}

.empty-state h4 {
  font-size: 16px;
  margin-bottom: 8px;
  color: var(--gray-600);
}

.empty-state p {
  font-size: 14px;
  margin-bottom: 20px;
}

/* ===== TOAST ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--black);
  color: var(--white);
  padding: 14px 20px;
  border-radius: 8px;
  font-size: 14px;
  animation: slideIn .3s;
  max-width: 360px;
}

.toast.success { border-left: 4px solid var(--green); }
.toast.error { border-left: 4px solid var(--red); }

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ===== FILE UPLOAD ===== */
.upload-area {
  border: 2px dashed var(--gray-300);
  border-radius: 12px;
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s;
}

.upload-area:hover { border-color: var(--green); }

.upload-area svg {
  width: 40px;
  height: 40px;
  color: var(--gray-400);
  margin-bottom: 12px;
}

.upload-area p {
  color: var(--gray-500);
  font-size: 14px;
}

.upload-area .highlight { color: var(--green); font-weight: 600; }

/* ===== LOADING ===== */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin .6s linear infinite;
}

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

.loading-overlay {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .menu-toggle { display: block; }

  .header { padding: 0 16px; }

  .page-content { padding: 16px; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .stat-card { padding: 16px; }
  .stat-card .stat-value { font-size: 22px; }

  .modal { max-width: 100%; }
}

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