:root {
  --bg-color: #0f172a;
  --panel-bg: #1e293b;
  --card-bg: #334155;
  --text-color: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: #475569;
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #475569;
  --secondary-hover: #334155;
  --success-color: #16a34a;
  --success-hover: #15803d;
  --danger-color: #dc2626;
  --azure-color: #0078d4;
  --radius: 8px;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] {
  --bg-color: #f1f5f9;
  --panel-bg: #ffffff;
  --card-bg: #f8fafc;
  --text-color: #0f172a;
  --text-muted: #64748b;
  --border-color: #cbd5e1;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.app-header {
  background-color: var(--panel-bg);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo {
  font-size: 2rem;
}

.app-header h1 {
  font-size: 1.35rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-azure {
  background-color: var(--azure-color);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

.subtitle {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* API Status */
.api-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  background-color: rgba(255, 255, 255, 0.05);
  padding: 0.35rem 0.75rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online {
  background-color: #22c55e;
  box-shadow: 0 0 8px #22c55e;
}

.status-dot.offline {
  background-color: #ef4444;
}

/* Buttons */
.btn {
  background-color: var(--secondary-color);
  color: #fff;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-size: 0.875rem;
}

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

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

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

.btn-icon {
  padding: 0.5rem;
  border-radius: 50%;
  font-size: 1.1rem;
}

.btn-icon-sm {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}
.btn-icon-sm:hover {
  color: var(--text-color);
  background-color: rgba(255, 255, 255, 0.1);
}

/* Board Layout */
.board {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem;
  overflow-x: auto;
  flex: 1;
}

.column {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  width: 300px;
  min-width: 300px;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 120px);
  box-shadow: var(--shadow);
}

.column-header {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.column-title {
  background: none;
  border: 1px solid transparent;
  color: var(--text-color);
  font-weight: 700;
  font-size: 1rem;
  width: 100%;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

.column-title:focus {
  border-color: var(--azure-color);
  outline: none;
  background-color: var(--card-bg);
}

.column-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.card-count {
  background-color: var(--card-bg);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 12px;
}

.card-list {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  overflow-y: auto;
  flex: 1;
  min-height: 80px;
}

.btn-add-card {
  margin: 0.5rem 1rem 1rem;
  background-color: transparent;
  border: 1px dashed var(--border-color);
  color: var(--text-muted);
}

.btn-add-card:hover {
  background-color: var(--card-bg);
  color: var(--text-color);
  border-style: solid;
}

/* Card */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 0.85rem;
  box-shadow: var(--shadow);
  cursor: grab;
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.5rem;
}

.card:active {
  cursor: grabbing;
}

.card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.card-title {
  font-size: 0.925rem;
  line-height: 1.4;
  outline: none;
  min-height: 1.4em;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.25rem;
}

.card-priority {
  background-color: var(--panel-bg);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 0.15rem 0.4rem;
  font-size: 0.75rem;
}

.card-image-wrapper img {
  width: 100%;
  max-height: 150px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 0.4rem;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.75);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-content {
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow);
}

.modal-sm {
  max-width: 450px;
}

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

.modal-header h2 {
  font-size: 1.15rem;
}

.btn-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.25rem;
  cursor: pointer;
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.admin-form {
  background-color: var(--card-bg);
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-row {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.form-row input {
  flex: 1;
  min-width: 160px;
  background-color: var(--panel-bg);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

th {
  background-color: var(--card-bg);
  color: var(--text-muted);
}

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

.preview-container img {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  margin-top: 0.5rem;
}

.hidden {
  display: none !important;
}

.full-width {
  width: 100%;
}