:root {
  --primary: #171717;
  --primary-hover: #383838;
  --secondary: #ffffff;
  --secondary-hover: #f5f5f5;
  --border: #e5e5e5;
  --background: #fafafa;
  --surface: #ffffff;
  --text-main: #171717;
  --text-muted: #737373;

  --success: #10b981;
  --success-bg: #d1fae5;
  --warning: #f59e0b;
  --warning-bg: #fef3c7;
  --danger: #ef4444;
  --danger-bg: #fee2e2;
  --info: #3b82f6;
  --info-bg: #dbeafe;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md:
    0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
  --shadow-lg:
    0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.05);
}

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

body {
  font-family: "Inter", sans-serif;
  background-color: var(--background);
  color: var(--text-main);
  line-height: 1.5;
  height: 100vh;
  overflow: hidden;
}

i[data-lucide] {
  width: 16px;
  height: 16px;
  stroke-width: 2;
}

.spin {
  animation: spin 1s linear infinite;
}
@keyframes spin {
  100% {
    transform: rotate(360deg);
  }
}

/* Layout */
.app-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
.top-nav {
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 1.1rem;
}

.stats-overview {
  display: flex;
  gap: 16px;
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--background);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
}
.stat-pill span {
  font-weight: 700;
}

/* Main Workspace */
.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  padding: 24px;
  overflow: hidden;
}

@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
    overflow-y: auto;
  }
}

.right-column {
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow: hidden;
}

/* Panels */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
}

.panel-header h2 {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.scrollable-content {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
}

/* UI Elements */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  border: 1px solid transparent;
}

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

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

.btn-danger {
  background: var(--danger);
  color: white;
}
.btn-danger:hover {
  filter: brightness(0.9);
}

.btn-icon {
  padding: 6px;
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}
.btn-icon:hover {
  background: var(--background);
  color: var(--text-main);
}
.btn-icon-small {
  padding: 4px;
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--background);
  border: 1px solid var(--border);
  padding: 0 12px;
  border-radius: var(--radius-sm);
  height: 32px;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-family: inherit;
  font-size: 0.875rem;
  width: 150px;
}

/* Kanban Board Layout */
.kanban-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(280px, 1fr));
  gap: 16px;
  height: 100%;
  overflow-x: auto;
  padding: 20px;
}

.kanban-lane {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 100%;
}

.kanban-lane-header {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #fdfdfd;
}

.kanban-lane-header h3 {
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.lane-count {
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  color: var(--text-muted);
}

.kanban-cards {
  padding: 12px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}

.book-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.book-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.book-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.book-title {
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-main);
  line-height: 1.3;
}
.book-author {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 4px;
}
.book-meta {
  display: flex;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--text-muted);
}
.book-isbn {
  font-family: monospace;
}
.book-details {
  flex: 1;
  font-size: 0.875rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.status-badge {
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  white-space: nowrap;
}
.bg-available {
  background: var(--success-bg);
  color: var(--success);
}
.bg-borrowed {
  background: var(--warning-bg);
  color: var(--warning);
}
.bg-reserved {
  background: var(--info-bg);
  color: var(--info);
}
.bg-maintenance {
  background: var(--border);
  color: var(--text-muted);
}

.book-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin-top: auto;
}
.book-dates {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.due-alert {
  color: var(--danger);
  font-weight: 500;
}

/* Tag/Pill */
.tag {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--background);
  border: 1px solid var(--border);
  color: var(--text-muted);
}

/* Tables */
.table-container {
  overflow-x: auto;
  flex: 1;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}
.data-table th,
.data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  font-weight: 500;
  color: var(--text-muted);
  background: var(--background);
  position: sticky;
  top: 0;
}
.data-table tr:hover td {
  background: var(--background);
}

/* Timeline for Transactions */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 16px;
  flex: 1;
  overflow-y: auto;
}
.timeline-item {
  display: flex;
  gap: 12px;
}
.timeline-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.icon-borrow {
  background: var(--warning-bg);
  color: var(--warning);
}
.icon-return {
  background: var(--success-bg);
  color: var(--success);
}
.timeline-content {
  flex: 1;
  font-size: 0.875rem;
}
.timeline-content strong {
  color: var(--text-main);
  font-weight: 600;
}
.timeline-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  gap: 8px;
}
.fine-badge {
  color: var(--danger);
  font-weight: 600;
}

/* Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  z-index: 50;
  opacity: 0;
  transition: opacity 0.2s;
  overflow-y: auto;
  padding: 40px 20px;
}
.modal-backdrop.active {
  display: flex;
  opacity: 1;
}
.modal {
  background: var(--surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  display: flex;
  flex-direction: column;
  transform: scale(0.95);
  transition: transform 0.2s;
  margin: auto;
}
.modal-backdrop.active .modal {
  transform: scale(1);
}
.modal.modal-small {
  max-width: 400px;
}
.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-body {
  padding: 20px;
  overflow: visible;
}
.btn-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
}
.btn-close:hover {
  color: var(--text-main);
}

/* Forms */
.form-group {
  margin-bottom: 16px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-main);
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.875rem;
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--text-muted);
}
.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}
.w-full {
  width: 100%;
}
.mt-4 {
  margin-top: 16px;
}
.mb-4 {
  margin-bottom: 16px;
}
.text-muted {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Floating API Terminal (Vercel Style) */
.api-terminal.floating {
  position: fixed;
  top: calc(100vh - 374px); /* 350 height + 24 bottom margin */
  left: calc(100vw - 524px); /* 500 width + 24 right margin */
  width: 500px;
  height: 350px;
  background: #000;
  border: 1px solid #333;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6);
  z-index: 1000;
  /* Transition all properties to allow smooth interpolation to and from fullscreen */
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.api-terminal.dragging {
  /* Enforce no transitions during drag */
  transition: none !important;
}

.api-terminal.fullscreen {
  width: calc(100vw - 32px) !important;
  height: calc(100vh - 32px) !important;
  /* Add explicit transition for top/left only when going fullscreen */
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  left: 16px !important;
  top: 16px !important;
  transform: none;
  border-radius: 12px;
}

.api-terminal.minimized {
  transform: translateY(310px); /* Keep header visible (350 - 40) */
  opacity: 0.8;
}

.api-terminal.minimized:hover {
  opacity: 1;
}

.terminal-header {
  background: #000;
  color: #ededed;
  padding: 8px 16px;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #333;
  cursor: grab;
  user-select: none;
}
.terminal-header:active {
  cursor: grabbing;
}

.terminal-content {
  flex: 1;
  padding: 12px 16px;
  overflow-y: auto;
  overscroll-behavior: contain;
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  font-size: 0.75rem;
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: #000;
  color: #a1a1aa;
}

/* Custom terminal scrollbar */
.terminal-content::-webkit-scrollbar {
  width: 8px;
}
.terminal-content::-webkit-scrollbar-track {
  background: #000;
}
.terminal-content::-webkit-scrollbar-thumb {
  background: #333;
  border-radius: 4px;
}
.terminal-content::-webkit-scrollbar-thumb:hover {
  background: #555;
}
.log-entry {
  display: flex;
  gap: 12px;
}
.log-time {
  color: #525252;
}
.log-method {
  font-weight: bold;
  width: 45px;
}
.method-GET {
  color: #60a5fa;
}
.method-POST {
  color: #34d399;
}
.method-PUT,
.method-PATCH {
  color: #fbbf24;
}
.method-DELETE {
  color: #f87171;
}
.log-url {
  color: #e5e5e5;
}
.log-status {
  font-weight: bold;
}
.status-200,
.status-201 {
  color: #34d399;
}
.status-400,
.status-404 {
  color: #f87171;
}
.status-500 {
  color: #ef4444;
}

.empty-state {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 0.875rem;
}

/* Toast Notifications */
.toast-wrapper {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 100;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  font-weight: 500;
  max-width: 350px;
  animation: slideIn 0.3s ease forwards;
  transition: all 0.3s ease;
}
@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}
.toast-message {
  flex: 1;
}
.toast-success i[data-lucide] {
  color: var(--success);
}
.toast-error i[data-lucide] {
  color: var(--danger);
}
.toast-warning i[data-lucide] {
  color: var(--warning);
}
.toast-info i[data-lucide] {
  color: var(--info);
}
.text-danger {
  color: var(--danger) !important;
}
.text-danger:hover {
  color: #dc2626 !important;
  background-color: var(--danger-bg) !important;
}

/* Custom Select Dropdown */
.custom-select {
  position: relative;
  width: 100%;
}
.select-trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  cursor: pointer;
  font-size: 0.875rem;
  transition: border-color 0.2s;
}
.select-trigger:hover {
  border-color: var(--text-muted);
}
.custom-select.active .select-trigger {
  border-color: var(--primary);
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}
.custom-select.active .select-trigger i[data-lucide] {
  transform: rotate(180deg);
}
.select-options {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--primary);
  border-top: none;
  border-bottom-left-radius: var(--radius-sm);
  border-bottom-right-radius: var(--radius-sm);
  max-height: 200px;
  overflow-y: auto;
  z-index: 10;
  display: none;
  box-shadow: var(--shadow-md);
}
.custom-select.active .select-options {
  display: block;
  animation: slideDown 0.15s ease-out forwards;
}
@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.select-option {
  padding: 8px 12px;
  font-size: 0.875rem;
  cursor: pointer;
  transition: background 0.1s;
}
.select-option:hover {
  background: var(--secondary-hover);
}