/* ============================================================
   CSS Variables
   ============================================================ */
:root {
  --color-primary: #6366F1;
  --color-primary-dark: #4F46E5;
  --color-primary-light: #A5B4FC;
  --color-background: #F8FAFC;
  --color-surface: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text: #1E293B;
  --color-text-secondary: #64748B;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-danger: #EF4444;
  --color-info: #3B82F6;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
  --font-sans: 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Meiryo', system-ui, -apple-system, sans-serif;
  --transition: 0.15s ease;
}

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

html, body {
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-background);
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
   Navigation Bar
   ============================================================ */
.navbar {
  height: 56px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar-brand svg {
  width: 24px;
  height: 24px;
}

.navbar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.navbar-title-input {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  flex: 1;
  border: 1px solid transparent;
  background: transparent;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  outline: none;
  min-width: 0;
  font-family: var(--font-sans);
  transition: border-color var(--transition), background var(--transition);
}

.navbar-title-input:hover {
  border-color: var(--color-border);
  background: var(--color-background);
}

.navbar-title-input:focus {
  border-color: var(--color-primary);
  background: var(--color-surface);
}

.navbar-spacer {
  flex: 1;
}

.navbar-user {
  font-size: 13px;
  color: var(--color-text-secondary);
}

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

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-sans);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

.btn-lg {
  padding: 10px 20px;
  font-size: 15px;
}

.btn-icon {
  padding: 7px;
  width: 32px;
  height: 32px;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-border);
}

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

.btn-danger:hover:not(:disabled) {
  background: #DC2626;
}

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

.btn-success:hover:not(:disabled) {
  background: #059669;
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-background);
  color: var(--color-text);
  border-color: var(--color-border);
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-group:last-of-type {
  margin-bottom: 0;
}

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

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-surface);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 2px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  background: var(--color-surface);
}

.form-error {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: 4px;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-clickable {
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.card-clickable:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

.card-meta {
  font-size: 12px;
  color: var(--color-text-secondary);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.card-actions {
  display: flex;
  gap: 6px;
  margin-top: 12px;
}

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.badge-success {
  background: #D1FAE5;
  color: #065F46;
}

.badge-secondary {
  background: var(--color-background);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.badge-primary {
  background: #EEF2FF;
  color: var(--color-primary-dark);
}

.badge-warning {
  background: #FEF3C7;
  color: #92400E;
}

/* ============================================================
   Grid
   ============================================================ */
.grid {
  display: grid;
  gap: 16px;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-3, .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
}

/* ============================================================
   Modal
   ============================================================ */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  opacity: 0;
  animation: fadeIn 0.15s ease forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-xl);
  transform: translateY(10px);
  animation: slideUp 0.15s ease forwards;
}

@keyframes slideUp {
  to { transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
}

.modal-close {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: none;
  background: var(--color-background);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 16px;
  transition: background var(--transition);
}

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

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* ============================================================
   Toast Notifications
   ============================================================ */
#toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--color-text);
  color: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 13px;
  max-width: 320px;
  pointer-events: auto;
  animation: toastIn 0.2s ease;
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast.toast-success { background: var(--color-success); }
.toast.toast-error { background: var(--color-danger); }
.toast.toast-info { background: var(--color-info); }
.toast.toast-warning { background: var(--color-warning); color: var(--color-text); }

.toast.fade-out {
  animation: toastOut 0.2s ease forwards;
}

@keyframes toastOut {
  to {
    opacity: 0;
    transform: translateX(20px);
  }
}

/* ============================================================
   Loading Spinner
   ============================================================ */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 500;
}

/* ============================================================
   Page Layout
   ============================================================ */
.page-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
}

.section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ============================================================
   Login Page
   ============================================================ */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #EEF2FF 0%, #F8FAFC 50%, #F0FDF4 100%);
  padding: 20px;
}

.login-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  padding: 36px 40px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-border);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  text-align: center;
}

.login-logo-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(99, 102, 241, 0.3);
}

.login-logo-icon svg {
  width: 32px;
  height: 32px;
  color: white;
  fill: white;
}

.login-logo h1 {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-text);
}

.login-logo p {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.login-error {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: #B91C1C;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 13px;
  margin-bottom: 16px;
  display: none;
}

.login-btn {
  width: 100%;
  padding: 11px;
  font-size: 15px;
  margin-top: 20px;
}

/* ============================================================
   Dashboard
   ============================================================ */
.workspace-section {
  margin-bottom: 32px;
}

.workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.mindmap-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.mindmap-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.mindmap-card-preview {
  height: 120px;
  background: linear-gradient(135deg, #EEF2FF, #E0E7FF);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.mindmap-card-preview-icon {
  opacity: 0.3;
}

.mindmap-card-body {
  padding: 14px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.mindmap-card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  display: block;
}

.mindmap-card-title:hover {
  color: var(--color-primary);
}

.mindmap-card-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-background);
}

.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-text-secondary);
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  opacity: 0.3;
}

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

/* ============================================================
   Mind Map Editor
   ============================================================ */
.editor-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.editor-body {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative;
}

.editor-canvas {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #F8FAFC;
  background-image: radial-gradient(circle, #CBD5E1 1px, transparent 1px);
  background-size: 24px 24px;
}

.editor-canvas svg {
  width: 100%;
  height: 100%;
  cursor: default;
  user-select: none;
}

/* Toolbar */
.editor-toolbar {
  position: absolute;
  left: 16px;
  top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 8px;
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.editor-toolbar-divider {
  height: 1px;
  background: var(--color-border);
  margin: 2px 0;
}

.toolbar-btn {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  font-size: 16px;
  transition: all var(--transition);
  position: relative;
}

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

.toolbar-btn.active {
  background: #EEF2FF;
  color: var(--color-primary);
}

.toolbar-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Node panel */
.node-panel {
  width: 240px;
  border-left: 1px solid var(--color-border);
  background: var(--color-surface);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  transition: width var(--transition);
}

.node-panel.hidden {
  width: 0;
  padding: 0;
  overflow: hidden;
  border-left: none;
}

.node-panel-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.node-panel .form-group {
  margin-bottom: 12px;
}

/* Zoom display */
.zoom-display {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  font-size: 12px;
  color: var(--color-text-secondary);
  box-shadow: var(--shadow-sm);
  z-index: 10;
  pointer-events: none;
}

/* SVG Node styles (applied via inline attributes in JS) */
.mindmap-node {
  cursor: pointer;
}

.mindmap-node rect {
  transition: filter 0.15s ease;
}

/* ============================================================
   Table (Admin)
   ============================================================ */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

thead {
  background: var(--color-background);
}

th {
  padding: 10px 16px;
  text-align: left;
  font-weight: 600;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

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

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

/* ============================================================
   Shared View
   ============================================================ */
.view-layout {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.view-canvas {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: #F8FAFC;
  background-image: radial-gradient(circle, #CBD5E1 1px, transparent 1px);
  background-size: 24px 24px;
}

.view-canvas svg {
  width: 100%;
  height: 100%;
}

.refresh-indicator {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 6px 12px;
  font-size: 12px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-sm);
}

/* ============================================================
   Publish button states
   ============================================================ */
.btn-publish {
  background: var(--color-success);
  color: white;
}

.btn-publish:hover:not(:disabled) {
  background: #059669;
}

.btn-unpublish {
  background: var(--color-warning);
  color: var(--color-text);
}

.btn-unpublish:hover:not(:disabled) {
  background: #D97706;
  color: white;
}

/* ============================================================
   Misc Utilities
   ============================================================ */
.text-sm { font-size: 12px; }
.text-muted { color: var(--color-text-secondary); }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; }
.gap-1 { gap: 4px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.hidden { display: none !important; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ============================================================
   Tooltips
   ============================================================ */
[data-tooltip] {
  position: relative;
}

[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: rgba(15,23,42,0.9);
  color: white;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  white-space: nowrap;
  pointer-events: none;
  z-index: 1000;
}