/* client/style.css */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f3f4f6;
  --color-bg-card: #fff;
  --color-border: #e5e7eb;
  --color-text-primary: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-primary: #5850ec;
  --color-primary-hover: #4338ca;
  --color-success: #10b981;
  --color-chart-line: #5850ec;
  --color-chart-fill: #5850ec1a;
  --shadow-sm: 0 1px 2px 0 #0000000d;
  --shadow-md: 0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;
  --radius: 6px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-family: -apple-system, BlinkMacSystemFont, Segoe UI, Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
}

.dashboard-header {
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  z-index: 100;
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  top: 0;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items:  center;
  gap: 2rem;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.header-left {
  display: flex;
  align-items:  center;
  gap: 2rem;
}

.dashboard-title {
  color: var(--color-text-primary);
  display: flex;
  align-items:  center;
  gap: .5rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.dashboard-title .icon {
  font-size: 1.5rem;
}

.dashboard-nav {
  display: flex;
  gap: .5rem;
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: var(--radius);
  padding: .5rem 1rem;
  transition: all .15s;
  font-size: .875rem;
  font-weight: 500;
}

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

.nav-link[aria-current="page"] {
  color: var(--color-primary);
  background-color: var(--color-chart-fill);
}

.dashboard-controls {
  display: flex;
  flex-wrap: wrap;
  align-items:  center;
  gap: 1rem;
}

.control-group {
  display: flex;
  align-items:  center;
  gap: .5rem;
}

.control-label {
  color: var(--color-text-secondary);
  font-size: .875rem;
  font-weight: 500;
}

select, input[type="date"] {
  appearance: none;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-primary);
  cursor: pointer;
  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 fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-position: right .75rem center;
  background-repeat: no-repeat;
  padding: .5rem 2.5rem .5rem .75rem;
  transition: all .15s;
  font-size: .875rem;
}

select:hover, input[type="date"]:hover {
  border-color: var(--color-primary);
}

select:focus, input[type="date"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px #5850ec1a;
}

.dashboard-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.dashboard-section {
  margin-bottom: 2rem;
}

.section-header {
  margin-bottom: 1rem;
}

.section-title {
  color: var(--color-text-primary);
  font-size: 1.125rem;
  font-weight: 700;
}

.section-note {
  color: var(--color-text-secondary);
  margin-top: .25rem;
  font-size: .875rem;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  padding: 1.5rem;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items:  center;
  margin-bottom: 1rem;
}

.card-title {
  color: var(--color-text-primary);
  font-size: 1rem;
  font-weight: 600;
}

.card-subtitle {
  color: var(--color-text-secondary);
  margin-top: .25rem;
  font-size: .875rem;
}

.chart-container {
  position: relative;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
  padding: 1.5rem;
}

.chart-wrapper {
  width: 100%;
  height: 320px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.stats-row {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  justify-content: space-around;
  align-items:  center;
  margin-bottom: 1.5rem;
  padding: 1rem 0;
}

.aggregate-stats-row {
  margin-bottom: 1rem;
}

.stat-item {
  display: flex;
  position: relative;
  flex-direction: column;
  align-items:  center;
  padding: 0 1rem;
}

.stat-item:not(:last-child):after {
  content: "";
  position: absolute;
  background-color: var(--color-border);
  width: 1px;
  height: 40px;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.stat-label {
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: .025em;
  text-align: center;
  margin-bottom: .25rem;
  font-size: .75rem;
  font-weight: 500;
}

.stat-value {
  color: var(--color-text-primary);
  font-size: 1.5rem;
  font-weight: 600;
}

.data-table {
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
}

.data-table thead {
  background: var(--color-bg);
}

.data-table th {
  text-align: left;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 1px solid var(--color-border);
  padding: .75rem 1rem;
  font-size: .75rem;
  font-weight: 600;
}

.data-table td {
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
  position: relative;
  background: none;
  padding: .875rem 1rem;
  font-size: .875rem;
}

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

.data-table tbody tr:hover {
  background: var(--color-bg);
}

.table-cell-primary {
  color: var(--color-text-primary);
  font-weight: 500;
}

.table-cell-secondary {
  color: var(--color-text-secondary);
  font-size: .875rem;
}

.table-cell-number {
  text-align: right;
  color: var(--color-text-primary);
  font-weight: 500;
}

.table-cell-percentage {
  text-align: right;
  color: var(--color-text-muted);
  font-size: .875rem;
}

.progress-bar {
  background: var(--color-bg);
  overflow: hidden;
  border-radius: 2px;
  height: 4px;
  margin-top: .5rem;
}

.progress-fill {
  background: var(--color-primary);
  height: 100%;
  transition: width .3s;
}

.metric-row {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  justify-content: space-between;
  align-items:  center;
  padding: .75rem 0;
}

.metric-row:last-child {
  border-bottom: none;
}

.metric-label {
  color: var(--color-text-primary);
  display: flex;
  flex: 1;
  align-items:  center;
  gap: .5rem;
  font-size: .875rem;
  font-weight: 500;
}

.metric-label .icon {
  color: var(--color-text-muted);
  font-size: 1rem;
}

.metric-value {
  color: var(--color-text-primary);
  margin-left: 1rem;
  font-size: .875rem;
  font-weight: 600;
}

.empty-state {
  text-align: center;
  color: var(--color-text-secondary);
  padding: 3rem 1rem;
}

.empty-state-icon {
  opacity: .3;
  margin-bottom: 1rem;
  font-size: 3rem;
}

.empty-state-text {
  font-size: .875rem;
}

.loading {
  display: flex;
  color: var(--color-text-secondary);
  justify-content: center;
  align-items:  center;
  padding: 2rem;
}

.loading-spinner {
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  animation: spin .8s linear infinite;
  border-radius: 50%;
  width: 24px;
  height: 24px;
}

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

@media (width <= 768px) {
  .header-content {
    flex-direction: column;
    align-items:  flex-start;
    gap: 1rem;
  }

  .header-left {
    flex-direction: column;
    align-items:  flex-start;
    gap: 1rem;
    width: 100%;
  }

  .dashboard-nav {
    width: 100%;
  }

  .nav-link {
    text-align: center;
    flex: 1;
  }

  .dashboard-controls, .control-group {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  select, input[type="date"] {
    width: 100%;
  }

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

  .chart-wrapper {
    height: 240px;
  }

  .data-table {
    font-size: .813rem;
  }

  .data-table th, .data-table td {
    padding: .5rem .75rem;
  }
}

.mb-1 {
  margin-bottom: .5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}

.mb-3 {
  margin-bottom: 1.5rem;
}

.mb-4 {
  margin-bottom: 2rem;
}

.mt-1 {
  margin-top: .5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mt-3 {
  margin-top: 1.5rem;
}

.mt-4 {
  margin-top: 2rem;
}

.text-sm {
  font-size: .875rem;
}

.text-xs {
  font-size: .75rem;
}

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

.font-medium {
  font-weight: 500;
}

.font-semibold {
  font-weight: 600;
}

.flex {
  display: flex;
}

.items-center {
  align-items:  center;
}

.justify-between {
  justify-content: space-between;
}

.gap-1 {
  gap: .5rem;
}

.gap-2 {
  gap: 1rem;
}

.details-button {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-secondary);
  cursor: pointer;
  width: 100%;
  margin-top: 1rem;
  padding: .75rem;
  transition: all .15s;
  font-size: .875rem;
  font-weight: 500;
}

.details-button:hover {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.dialog-overlay {
  position: fixed;
  display: flex;
  z-index: 1000;
  background: #00000080;
  justify-content: center;
  align-items:  center;
  padding: 1rem;
  inset: 0;
}

.dialog {
  background: var(--color-bg-card);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  box-shadow: 0 20px 25px -5px #0000001a, 0 10px 10px -5px #0000000a;
}

.dialog-header {
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items:  center;
  padding: 1.5rem;
}

.dialog-title {
  color: var(--color-text-primary);
  font-size: 1.25rem;
  font-weight: 600;
}

.dialog-close {
  color: var(--color-text-secondary);
  cursor: pointer;
  background: none;
  border: none;
  padding: .25rem;
  transition: color .15s;
  font-size: 1.5rem;
  line-height: 1;
}

.dialog-close:hover {
  color: var(--color-text-primary);
}

.dialog-body {
  overflow-y: auto;
  flex: 1;
  padding: 1.5rem;
}

.data-table tbody tr {
  position: relative;
  background: none;
}

.data-table tbody tr:after {
  content: "";
  position: absolute;
  background: linear-gradient(to right, var(--color-chart-fill) 0%, var(--color-chart-fill) var(--progress-width, 0%), transparent var(--progress-width, 0%));
  z-index: 0;
  pointer-events: none;
  inset: 0;
}

.data-table tbody td {
  position: relative;
  z-index: 1;
}

.table-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items:  center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.search-box {
  flex: 1;
  min-width: 200px;
}

.search-input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-primary);
  background-color: var(--color-bg-card);
  width: 100%;
  padding: .5rem .75rem;
  transition: all .15s;
  font-size: .875rem;
}

.search-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px #5850ec1a;
}

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

.items-per-page {
  display: flex;
  color: var(--color-text-secondary);
  align-items:  center;
  gap: .5rem;
  font-size: .875rem;
}

.page-size-select {
  margin-left: .5rem;
}

.data-table th.sortable {
  cursor: pointer;
  user-select: none;
  transition: background-color .15s;
}

.data-table th.sortable:hover {
  background-color: var(--color-border);
}

.pagination {
  display: flex;
  border-top: 1px solid var(--color-border);
  justify-content: center;
  align-items:  center;
  gap: .5rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
}

.pagination-btn {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text-primary);
  cursor: pointer;
  min-width: 38px;
  padding: .5rem .75rem;
  transition: all .15s;
  font-size: .875rem;
  font-weight: 500;
}

.pagination-btn:hover:not(:disabled) {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.pagination-btn:disabled {
  opacity: .5;
  cursor: not-allowed;
}

.pagination-info {
  color: var(--color-text-secondary);
  padding: .5rem 1rem;
  font-size: .875rem;
  font-weight: 500;
}

.table-wrapper {
  overflow-x: auto;
  margin: -.5rem;
  padding: .5rem;
}

.sessions-table {
  min-width: 1000px;
}

.loading-state, .no-data-message {
  text-align: center;
  color: var(--color-text-secondary);
  padding: 3rem 1rem;
  font-size: .875rem;
}

.session-link {
  color: #06c;
  text-decoration: none;
  transition: color .2s;
  font-family: monospace;
  font-size: .875rem;
}

.session-link:hover {
  color: #004080;
  text-decoration: underline;
}

@media (width <= 768px) {
  .table-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .search-box {
    width: 100%;
  }

  .items-per-page {
    justify-content: space-between;
  }

  .pagination {
    flex-wrap: wrap;
  }

  .pagination-info {
    text-align: center;
    order: -1;
    width: 100%;
    margin-bottom: .5rem;
  }
}

.login-container {
  display: flex;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  justify-content: center;
  align-items:  center;
  min-height: 100vh;
  padding: 1rem;
}

.login-card {
  background: var(--color-bg-card);
  border-radius: 12px;
  width: 100%;
  max-width: 420px;
  padding: 2.5rem;
  box-shadow: 0 20px 25px -5px #0000001a, 0 10px 10px -5px #0000000a;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-title {
  color: var(--color-text-primary);
  display: flex;
  justify-content: center;
  align-items:  center;
  gap: .5rem;
  margin-bottom: .5rem;
  font-size: 1.875rem;
  font-weight: 700;
}

.login-title .icon {
  font-size: 2.5rem;
}

.login-subtitle {
  color: var(--color-text-secondary);
  font-size: .95rem;
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

.form-group label {
  color: var(--color-text-primary);
  font-size: .875rem;
  font-weight: 500;
}

.form-group input {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  transition: all .2s;
  font-family: inherit;
  font-size: .95rem;
}

.form-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px #5850ec1a;
}

.login-button {
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius);
  cursor: pointer;
  border: none;
  padding: .875rem 1rem;
  transition: all .2s;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
}

.login-button:hover:not(:disabled) {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px #5850ec4d;
}

.login-button:disabled {
  opacity: .6;
  cursor: not-allowed;
}

.error-modal-overlay {
  position: fixed;
  display: flex;
  z-index: 1000;
  animation: fadeIn .2s ease-out;
  background: #00000080;
  justify-content: center;
  align-items:  center;
  inset: 0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.error-modal {
  background: var(--color-bg-card);
  animation: slideUp .3s ease-out;
  border-radius: 12px;
  width: 90%;
  max-width: 480px;
  box-shadow: 0 20px 25px -5px #0000001a, 0 10px 10px -5px #0000000a;
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }

  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.error-modal-header {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  justify-content: space-between;
  align-items:  center;
  padding: 1.5rem 1.5rem 1rem;
}

.error-modal-header h3 {
  color: #dc2626;
  font-size: 1.25rem;
  font-weight: 600;
}

.error-modal-close {
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  background: none;
  border: none;
  border-radius: 4px;
  justify-content: center;
  align-items:  center;
  width: 32px;
  height: 32px;
  padding: 0;
  transition: all .2s;
  font-size: 1.5rem;
}

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

.error-modal-body {
  padding: 1.5rem;
}

.error-modal-body p {
  color: var(--color-text-primary);
  line-height: 1.6;
}