/* ═══════════════════════════════════════════════════════════════════════════
   STORM BLOCK DIAGRAMS — Complete CSS
   Professional Block Diagram Editor
   ═══════════════════════════════════════════════════════════════════════════ */


/* ═══════════════════════════════════════════════════════════════════════════
   1. THEME VARIABLES
   ═══════════════════════════════════════════════════════════════════════════ */

:root,
.dark-theme {
  --bg: #121212;
  --bg2: #1a1a1a;
  --sidebar: #1f1f1f;
  --header: #1f1f1f;
  --text: #ffffff;
  --text2: #ffffff;
  --accent: #4caf50;
  --accent-h: #66bb6a;
  --border: #333;
  --input-bg: #2a2a2a;
  --item: #262626;
  --item-h: #333;
  --modal: #222;
  --shadow: rgba(0, 0, 0, .5);
  --danger: #d32f2f;
  --success: #4caf50;
}

.light-theme {
  --bg: #f8fafc;
  --bg2: #f0f2f5;
  --sidebar: #ffffff;
  --header: #ffffff;
  --text: #000000;
  --text2: #000000;
  --accent: #2e7d32;
  --accent-h: #4caf50;
  --border: #cbd5e1;
  --input-bg: #ffffff;
  --item: #ffffff;
  --item-h: #f1f5f9;
  --modal: #ffffff;
  --shadow: rgba(0, 0, 0, .12);
  --danger: #ef4444;
  --success: #22c55e;
}

.black-theme {
  --bg: #000;
  --bg2: #060606;
  --sidebar: #0a0a0a;
  --header: #0a0a0a;
  --text: #ffffff;
  --text2: #ffffff;
  --accent: #4caf50;
  --accent-h: #66bb6a;
  --border: #2a2a2a;
  --input-bg: #111;
  --item: #0e0e0e;
  --item-h: #161616;
  --modal: #0a0a0a;
  --shadow: rgba(0, 0, 0, .9);
  --danger: #d32f2f;
  --success: #4caf50;
}


/* ═══════════════════════════════════════════════════════════════════════════
   2. CSS RESET & BASE
   ═══════════════════════════════════════════════════════════════════════════ */

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

html {
  height: 100%;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  height: 100%;
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

#app-shell {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--accent-h);
  text-decoration: underline;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  outline: none;
}

input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  outline: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text2);
}

::selection {
  background: var(--accent);
  color: #fff;
}

.material-icons-round {
  font-family: 'Material Icons Round';
  font-weight: normal;
  font-style: normal;
  font-size: 20px;
  line-height: 1;
  letter-spacing: normal;
  text-transform: none;
  display: inline-block;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'liga';
}


/* ═══════════════════════════════════════════════════════════════════════════
   3. AUTH OVERLAY
   ═══════════════════════════════════════════════════════════════════════════ */

.auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

.auth-card {
  width: 400px;
  max-width: 90vw;
  background: rgba(30, 30, 30, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  padding: 40px 32px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6),
              0 0 0 1px rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  animation: authCardAppear 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.light-theme .auth-card {
  background: rgba(255, 255, 255, 0.9);
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.12),
              0 0 0 1px rgba(0, 0, 0, 0.03);
}

/* ─── Светлая тема: улучшенная читаемость (ЧЕРНЫЙ ТЕКСТ) ─── */
.light-theme .sidebar-header-title {
  color: var(--text) !important;
  opacity: 1 !important;
}

.light-theme .form-input::placeholder {
  opacity: 0.6 !important;
  color: #000000 !important;
}

.light-theme .category-arrow {
  opacity: 1 !important;
  color: #000000 !important;
}

.light-theme .category-title {
  color: var(--text) !important;
  opacity: 1 !important;
}

.light-theme .shape-label {
  color: var(--text) !important;
  opacity: 1 !important;
}

.light-theme .prop-label {
  color: var(--text) !important;
  opacity: 1 !important;
}

.light-theme .prop-empty-hint {
  opacity: 1 !important;
  color: var(--text2) !important;
}

.light-theme .toolbar-separator {
  background: var(--border);
  opacity: 1 !important;
}

.light-theme .status-bar {
  border-top: 1px solid var(--border);
}

.light-theme .status-item {
  color: var(--text) !important;
  opacity: 1 !important;
}

.light-theme .dropdown-item {
  color: var(--text) !important;
}

.light-theme .context-menu-label {
  color: var(--text) !important;
}

.light-theme .context-menu-shortcut {
  color: var(--text2) !important;
  opacity: 1 !important;
}

.light-theme .modal-title {
  color: var(--text) !important;
}

.light-theme .export-preview-placeholder {
  opacity: 1 !important;
  color: var(--text) !important;
}

.light-theme .import-dropzone-formats {
  opacity: 1 !important;
  color: var(--text) !important;
}

.light-theme .profile-role {
  color: var(--text2) !important;
  opacity: 1 !important;
}

.light-theme .save-status {
  color: var(--text2) !important;
  opacity: 1 !important;
}

.light-theme .dropdown-shortcut {
  color: var(--text2) !important;
  opacity: 1 !important;
}

/* ─── Темные темы: белый цвет и высокая читаемость (БЕЛЫЙ ТЕКСТ) ─── */
.dark-theme .sidebar-header-title,
.black-theme .sidebar-header-title,
.dark-theme .category-title,
.black-theme .category-title,
.dark-theme .shape-label,
.black-theme .shape-label,
.dark-theme .prop-label,
.black-theme .prop-label,
.dark-theme .prop-empty-hint,
.black-theme .prop-empty-hint,
.dark-theme .status-item,
.black-theme .status-item,
.dark-theme .context-menu-shortcut,
.black-theme .context-menu-shortcut,
.dark-theme .dropdown-shortcut,
.black-theme .dropdown-shortcut,
.dark-theme .save-status,
.black-theme .save-status,
.dark-theme .profile-role,
.black-theme .profile-role,
.dark-theme .category-arrow,
.black-theme .category-arrow {
  color: #ffffff !important;
  opacity: 1 !important;
}

.light-theme header {
  border-bottom: 1px solid var(--border);
}

.light-theme .toolbar {
  border-bottom: 1px solid var(--border);
}

.light-theme .sidebar {
  border-color: var(--border);
}

.black-theme .auth-card {
  background: rgba(10, 10, 10, 0.95);
  border-color: rgba(255, 255, 255, 0.05);
}

@keyframes authCardAppear {
  0% {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-screen {
  display: none;
}

.auth-screen.active {
  display: block;
  animation: authScreenFade 0.3s ease;
}

@keyframes authScreenFade {
  from {
    opacity: 0;
    transform: translateX(10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.auth-logo {
  text-align: center;
  margin-bottom: 20px;
}

.auth-logo-icon {
  font-size: 48px !important;
  color: var(--accent);
  display: inline-block;
}

.auth-title {
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4px;
  color: var(--text);
  letter-spacing: -0.3px;
}

.auth-subtitle {
  font-size: 13px;
  color: var(--text2);
  text-align: center;
  margin-bottom: 28px;
  opacity: 0.7;
}

.auth-error {
  background: rgba(211, 47, 47, 0.15);
  border: 1px solid rgba(211, 47, 47, 0.3);
  color: #ef5350;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 12px;
  margin-bottom: 18px;
  line-height: 1.4;
}

.form-group {
  margin-bottom: 18px;
}

.input-icon-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: 12px;
  font-size: 18px !important;
  color: var(--text2);
  opacity: 0.5;
  pointer-events: none;
  z-index: 1;
}

.form-input {
  width: 100%;
  height: 44px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 13px;
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.input-icon-wrap .form-input {
  padding-left: 40px;
}

.form-input::placeholder {
  color: var(--text2);
  opacity: 0.4;
}

.form-input:hover {
  border-color: var(--text2);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.15);
  background: var(--input-bg);
}

.btn-visibility {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--text2);
  opacity: 0.5;
  transition: opacity 0.2s ease, background 0.2s ease;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.btn-visibility:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.05);
}

.btn-visibility .material-icons-round {
  font-size: 18px !important;
}

.btn-auth-primary {
  width: 100%;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
  margin-top: 6px;
}

.btn-auth-primary:hover {
  background: var(--accent-h);
  box-shadow: 0 4px 16px rgba(76, 175, 80, 0.3);
}

.btn-auth-primary:active {
  transform: scale(0.98);
}

.btn-auth-primary .material-icons-round {
  font-size: 20px !important;
}

.auth-switch {
  text-align: center;
  font-size: 13px;
  color: var(--text2);
  margin-top: 20px;
  opacity: 0.7;
}

.auth-switch a {
  color: var(--accent);
  font-weight: 500;
}

.auth-switch a:hover {
  text-decoration: underline;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text2);
  margin-bottom: 6px;
}


/* ═══════════════════════════════════════════════════════════════════════════
   4. HEADER
   ═══════════════════════════════════════════════════════════════════════════ */

header {
  height: 56px;
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--header);
  border-bottom: 2px solid var(--accent);
  z-index: 100;
  gap: 12px;
  flex-shrink: 0;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-center {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  min-width: 0;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.header-logo-icon {
  font-size: 26px !important;
  color: var(--accent);
}

.header-title {
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: 0.3px;
  color: var(--text);
}

.sidebar-toggle-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text2);
  transition: background 0.2s ease, color 0.2s ease;
  background: none;
  border: none;
  cursor: pointer;
}

.sidebar-toggle-btn:hover {
  background: var(--item-h);
  color: var(--text);
}

.sidebar-toggle-btn .material-icons-round {
  font-size: 22px !important;
}

.diagram-title-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 0;
}

.diagram-title-input {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  text-align: center;
  min-width: 120px;
  max-width: 300px;
  transition: border-color 0.2s ease, background 0.2s ease;
  outline: none;
}

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

.diagram-title-input:focus {
  border-color: var(--accent);
  background: var(--input-bg);
  box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.15);
}

.save-status {
  font-size: 10px;
  color: var(--text2);
  opacity: 0.5;
  letter-spacing: 0.3px;
}

.header-profile {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  border-radius: 8px;
  transition: background 0.2s ease;
}

.header-profile:hover {
  background: var(--item-h);
}

.profile-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--item);
  color: var(--accent);
  flex-shrink: 0;
}

.profile-avatar .material-icons-round {
  font-size: 22px !important;
}

.profile-info {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.profile-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

.profile-role {
  font-size: 10px;
  color: var(--text2);
  opacity: 0.6;
  white-space: nowrap;
}

.btn-logout {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 34px;
  padding: 0 12px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text2);
  background: transparent;
  border: 1px solid var(--border);
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
}

.btn-logout:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(211, 47, 47, 0.08);
}

.btn-logout .material-icons-round {
  font-size: 16px !important;
}

.logout-text {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
}


/* ═══════════════════════════════════════════════════════════════════════════
   5. TOOLBAR
   ═══════════════════════════════════════════════════════════════════════════ */

.toolbar {
  height: 40px;
  min-height: 40px;
  display: flex;
  align-items: stretch;
  padding: 0 8px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  gap: 2px;
  z-index: 99;
  position: relative;
  flex-shrink: 0;
}

/* ─── Dropdown Menu Group ─── */

.toolbar-menu-group {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.toolbar-menu-item {
  position: relative;
  display: flex;
  align-items: stretch;
}

.toolbar-menu-btn {
  display: flex;
  align-items: center;
  padding: 0 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  white-space: nowrap;
  height: 100%;
  align-self: stretch;
}

.toolbar-menu-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff !important;
}

.light-theme .toolbar-menu-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: #000000 !important;
}

.toolbar-menu-btn.active {
  background: var(--accent) !important;
  color: #ffffff !important;
}

.toolbar-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--modal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  box-shadow: 0 12px 40px var(--shadow);
  z-index: 200;
  animation: dropdownAppear 0.15s ease;
}

.toolbar-dropdown.open {
  display: block;
}

@keyframes dropdownAppear {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.15s ease;
  white-space: nowrap;
}

.dropdown-item:hover {
  background: var(--item-h);
}

.dropdown-item .material-icons-round {
  font-size: 18px !important;
  color: var(--text2);
  opacity: 0.7;
  flex-shrink: 0;
}

.dropdown-label {
  flex: 1;
}

.dropdown-shortcut {
  font-size: 11px;
  color: var(--text2);
  opacity: 0.5;
  margin-left: auto;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.dropdown-separator {
  height: 1px;
  background: var(--border);
  margin: 4px 8px;
}

/* ─── Toolbar Separator ─── */

.toolbar-separator {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 6px;
  flex-shrink: 0;
  align-self: center;
}

/* ─── Tool Buttons ─── */

.toolbar-tools {
  display: flex;
  align-items: center;
  align-self: center;
  gap: 2px;
}

.toolbar-tool-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--text2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}

.toolbar-tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.light-theme .toolbar-tool-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: #000000;
}

.toolbar-tool-btn.active {
  background: var(--accent) !important;
  color: #fff !important;
  box-shadow: 0 2px 8px var(--accent-light, rgba(76, 175, 80, 0.3));
}

.toolbar-tool-btn .material-icons-round {
  font-size: 20px !important;
}

/* ─── History (Undo/Redo) ─── */

.toolbar-history {
  display: flex;
  align-items: center;
  align-self: center;
  gap: 2px;
}

.toolbar-icon-btn {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--text2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.toolbar-icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

.light-theme .toolbar-icon-btn:hover {
  background: rgba(0, 0, 0, 0.06);
  color: #000000;
}

.toolbar-icon-btn:disabled,
.toolbar-icon-btn.disabled {
  opacity: 0.25 !important;
  cursor: default;
  pointer-events: none;
}

.toolbar-icon-btn .material-icons-round {
  font-size: 20px !important;
}

/* ─── Zoom Controls ─── */

.toolbar-zoom {
  display: flex;
  align-items: center;
  align-self: center;
  gap: 2px;
  margin-left: auto;
}

.zoom-level {
  font-size: 11px;
  font-weight: 600;
  color: var(--text2);
  min-width: 42px;
  text-align: center;
  padding: 0 4px;
  user-select: none;
  letter-spacing: 0.2px;
}


/* ═══════════════════════════════════════════════════════════════════════════
   6. APP BODY
   ═══════════════════════════════════════════════════════════════════════════ */

.app-body {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
}


/* ═══════════════════════════════════════════════════════════════════════════
   7. SIDEBARS
   ═══════════════════════════════════════════════════════════════════════════ */

.sidebar {
  display: flex;
  flex-direction: column;
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  transition: width 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              min-width 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              opacity 0.2s ease;
  overflow: hidden;
  flex-shrink: 0;
  z-index: 50;
}

.sidebar.left-sidebar {
  width: 280px;
  min-width: 280px;
  border-right: 1px solid var(--border);
  border-left: none;
}

.sidebar.right-sidebar {
  width: 300px;
  min-width: 300px;
  border-right: none;
  border-left: 1px solid var(--border);
}

.sidebar.collapsed {
  width: 0;
  min-width: 0;
  border-color: transparent;
  opacity: 0;
  overflow: hidden;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-header .material-icons-round {
  font-size: 18px !important;
  color: var(--accent);
  opacity: 0.8;
}

.sidebar-header-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text2);
  opacity: 0.7;
}

.sidebar-search {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sidebar-search .form-input {
  height: 34px;
  font-size: 12px;
  border-radius: 6px;
}

.sidebar-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
  padding: 4px 0;
}

/* Скроллбар в сайдбарах */
.sidebar-content::-webkit-scrollbar {
  width: 6px;
}
.sidebar-content::-webkit-scrollbar-track {
  background: transparent;
}
.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
.sidebar-content::-webkit-scrollbar-thumb:hover {
  background: var(--text2);
}

.sidebar-bottom {
  border-top: 1px solid var(--border);
  padding: 12px;
  flex-shrink: 0;
}


/* ═══════════════════════════════════════════════════════════════════════════
   8. SHAPE LIBRARY
   ═══════════════════════════════════════════════════════════════════════════ */

.shape-category {
  border-bottom: 1px solid var(--border);
}

.shape-category:last-child {
  border-bottom: none;
}

.shape-category-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  cursor: pointer;
  transition: background 0.15s ease;
  user-select: none;
}

.shape-category-header:hover {
  background: var(--item-h);
}

.category-icon {
  font-size: 18px !important;
  color: var(--accent);
  opacity: 0.7;
  flex-shrink: 0;
}

.category-title {
  flex: 1;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--text2);
  opacity: 0.8;
}

.category-arrow {
  font-size: 20px !important;
  color: var(--text2);
  opacity: 0.4;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.shape-category.collapsed .category-arrow {
  transform: rotate(-90deg);
}

.shape-category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 6px 12px 12px;
}

.shape-category.collapsed .shape-category-grid {
  display: none;
}

.shape-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px 4px 6px;
  border-radius: 8px;
  background: var(--item);
  border: 1px solid transparent;
  cursor: grab;
  transition: all 0.15s ease;
  user-select: none;
}

.shape-item:hover {
  background: var(--item-h);
  border-color: var(--border);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px var(--shadow);
}

.shape-item:active {
  cursor: grabbing;
  transform: translateY(0);
}

.shape-preview {
  width: 40px;
  height: 32px;
  flex-shrink: 0;
}

.shape-label {
  font-size: 9px;
  color: var(--text2);
  opacity: 0.6;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
  line-height: 1.2;
}


/* ═══════════════════════════════════════════════════════════════════════════
   9. THEME CONTROLS
   ═══════════════════════════════════════════════════════════════════════════ */

.theme-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.theme-switcher {
  display: flex;
  gap: 4px;
  background: var(--item);
  border-radius: 8px;
  padding: 3px;
}

.theme-btn {
  flex: 1;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  color: var(--text2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-btn:hover {
  background: var(--item-h);
  color: var(--text);
}

.theme-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 8px var(--accent-light, rgba(76, 175, 80, 0.25));
}

.theme-btn .material-icons-round {
  font-size: 18px !important;
}

.accent-colors {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
}

.accent-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--dot-color);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: 2px solid transparent;
  flex-shrink: 0;
}

.accent-dot:hover {
  transform: scale(1.2);
}

.accent-dot.active {
  border-color: var(--text);
  box-shadow: 0 0 0 2px var(--dot-color);
  transform: scale(1.15);
}


/* ═══════════════════════════════════════════════════════════════════════════
   10. CANVAS AREA
   ═══════════════════════════════════════════════════════════════════════════ */

.canvas-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.canvas-area {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
}

.light-theme .canvas-area {
  background:
    linear-gradient(rgba(0, 0, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}

.black-theme .canvas-area {
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 20px 20px;
}

#svg-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ─── Minimap ─── */

.minimap {
  position: absolute;
  bottom: 36px;
  right: 12px;
  width: 200px;
  height: 150px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  z-index: 40;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.minimap:hover {
  opacity: 1;
}

.minimap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.minimap-viewport {
  position: absolute;
  border: 2px solid var(--accent);
  border-radius: 2px;
  background: rgba(76, 175, 80, 0.08);
  cursor: move;
  pointer-events: auto;
  z-index: 1;
}

/* ─── Status Bar ─── */

.status-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  font-size: 10px;
  color: var(--text2);
  opacity: 0.6;
  z-index: 30;
  gap: 16px;
}

.status-bar span {
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}


/* ═══════════════════════════════════════════════════════════════════════════
   11. PROPERTIES PANEL (Right Sidebar Content)
   ═══════════════════════════════════════════════════════════════════════════ */

.prop-no-selection {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  text-align: center;
  height: 100%;
}

.prop-empty-icon {
  font-size: 48px !important;
  color: var(--text2);
  opacity: 0.2;
  margin-bottom: 12px;
}

.prop-empty-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--text2);
  opacity: 0.6;
  margin-bottom: 6px;
}

.prop-empty-hint {
  font-size: 11px;
  color: var(--text2);
  opacity: 0.4;
  max-width: 200px;
  line-height: 1.5;
}

.prop-sections {
  padding: 0;
}

/* ─── Property Section ─── */

.prop-section {
  border-bottom: 1px solid var(--border);
}

.prop-section:last-child {
  border-bottom: none;
}

.prop-section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  cursor: pointer;
  transition: background 0.15s ease;
  user-select: none;
}

.prop-section-header:hover {
  background: var(--item-h);
}

.prop-section-header .material-icons-round {
  font-size: 18px !important;
  color: var(--accent);
  opacity: 0.7;
}

.prop-section-header span:nth-child(2) {
  flex: 1;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text2);
  opacity: 0.8;
}

.section-arrow {
  font-size: 20px !important;
  color: var(--text2) !important;
  opacity: 0.4 !important;
  transition: transform 0.25s ease;
}

.prop-section.collapsed .section-arrow {
  transform: rotate(-90deg);
}

.prop-section.collapsed .prop-section-body {
  display: none;
}

.prop-section-body {
  padding: 6px 14px 14px;
}

/* ─── Property Rows ─── */

.prop-row {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.prop-row:last-child {
  margin-bottom: 0;
}

.prop-field {
  flex: 1;
  min-width: 0;
}

.prop-field-full {
  flex: 1;
  min-width: 0;
  width: 100%;
}

.prop-label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text2);
  opacity: 0.6;
  margin-bottom: 4px;
}

.prop-input {
  width: 100%;
  height: 30px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 8px;
  font-size: 12px;
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.prop-input:hover {
  border-color: var(--text2);
}

.prop-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.12);
}

.prop-input-hex {
  font-family: 'Inter', monospace;
  font-size: 11px;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.prop-select {
  width: 100%;
  height: 30px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0 8px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  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 d='M3 5l3 3 3-3' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 8px center;
  padding-right: 26px;
  transition: border-color 0.2s ease;
}

.prop-select:hover {
  border-color: var(--text2);
}

.prop-select:focus {
  border-color: var(--accent);
}

/* ─── Color Input ─── */

.prop-color {
  width: 30px;
  height: 30px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
  cursor: pointer;
  background: var(--input-bg);
  flex-shrink: 0;
}

.prop-color::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.prop-color::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

.prop-color-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
}

.prop-color-wrap .prop-input-hex {
  flex: 1;
}

/* ─── Range Slider ─── */

.prop-range {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--border);
  outline: none;
  cursor: pointer;
}

.prop-range::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  transition: transform 0.15s ease;
}

.prop-range::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.prop-range::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid var(--bg);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.prop-range-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.prop-range-wrap .prop-range {
  flex: 1;
}

.prop-range-value {
  font-size: 11px;
  font-weight: 600;
  color: var(--text2);
  min-width: 36px;
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

/* ─── Input Suffix ─── */

.prop-input-suffix-wrap {
  display: flex;
  align-items: center;
  position: relative;
}

.prop-input-suffix-wrap .prop-input {
  padding-right: 28px;
}

.prop-suffix {
  position: absolute;
  right: 8px;
  font-size: 11px;
  color: var(--text2);
  opacity: 0.5;
  pointer-events: none;
  font-weight: 500;
}

/* ─── Toggle Switch ─── */

.prop-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 36px;
  height: 20px;
  cursor: pointer;
}

.prop-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.prop-toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 10px;
  transition: background 0.25s ease;
}

.prop-toggle-slider::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.25s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.prop-toggle input:checked + .prop-toggle-slider {
  background: var(--accent);
}

.prop-toggle input:checked + .prop-toggle-slider::before {
  transform: translateX(16px);
}

/* ─── Button Group ─── */

.prop-btn-group {
  display: flex;
  gap: 2px;
  background: var(--item);
  border-radius: 6px;
  padding: 2px;
}

.prop-btn-toggle {
  width: 32px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  color: var(--text2);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.prop-btn-toggle:hover {
  background: var(--item-h);
  color: var(--text);
}

.prop-btn-toggle.active {
  background: var(--accent);
  color: #fff;
}

.prop-btn-toggle .material-icons-round {
  font-size: 18px !important;
}


/* ═══════════════════════════════════════════════════════════════════════════
   12. MODALS
   ═══════════════════════════════════════════════════════════════════════════ */

.modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 5000;
  animation: modalOverlayFade 0.2s ease;
}

@keyframes modalOverlayFade {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-box {
  background: var(--modal);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 24px 80px var(--shadow);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  animation: modalBoxAppear 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

@keyframes modalBoxAppear {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-large {
  width: 800px;
  max-width: 90vw;
}

.modal-medium {
  width: 600px;
  max-width: 90vw;
}

.modal-small {
  width: 450px;
  max-width: 90vw;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.modal-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

.modal-title .material-icons-round {
  font-size: 22px !important;
  color: var(--accent);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text2);
  opacity: 0.6;
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.15s ease;
}

.modal-close:hover {
  background: var(--item-h);
  opacity: 1;
  color: var(--text);
}

.modal-close .material-icons-round {
  font-size: 20px !important;
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ─── Projects Modal ─── */

.projects-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.projects-search {
  flex: 1;
  max-width: 300px;
}

.projects-search .form-input {
  height: 36px;
  font-size: 12px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.projects-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
  color: var(--text2);
  opacity: 0.5;
}

.projects-empty .material-icons-round {
  font-size: 48px !important;
  margin-bottom: 12px;
  opacity: 0.4;
}

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

/* ─── Export Modal ─── */

.export-formats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.export-format-option {
  cursor: pointer;
}

.export-format-option input[type="radio"] {
  display: none;
}

.export-format-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 24px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--item);
  transition: all 0.2s ease;
  min-width: 80px;
}

.export-format-option input[type="radio"]:checked + .export-format-card {
  border-color: var(--accent);
  background: rgba(76, 175, 80, 0.08);
}

.export-format-card:hover {
  border-color: var(--text2);
}

.export-format-card .material-icons-round {
  font-size: 28px !important;
  color: var(--text2);
  opacity: 0.6;
}

.export-format-option input[type="radio"]:checked + .export-format-card .material-icons-round {
  color: var(--accent);
  opacity: 1;
}

.export-format-name {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text2);
}

.export-format-option input[type="radio"]:checked + .export-format-card .export-format-name {
  color: var(--accent);
}

.export-options {
  padding: 16px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.export-preview {
  background: var(--item);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-height: 150px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.export-preview-placeholder {
  font-size: 13px;
  color: var(--text2);
  opacity: 0.4;
}

/* ─── Import Modal ─── */

.import-dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
}

.import-dropzone:hover {
  border-color: var(--accent);
  background: rgba(76, 175, 80, 0.04);
}

.import-dropzone.dragover {
  border-color: var(--accent);
  background: rgba(76, 175, 80, 0.08);
}

.import-dropzone-icon {
  font-size: 48px !important;
  color: var(--accent);
  opacity: 0.5;
  margin-bottom: 12px;
  display: block;
}

.import-dropzone-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 8px;
}

.import-dropzone-hint {
  font-size: 12px;
  color: var(--text2);
  opacity: 0.5;
  margin-bottom: 12px;
}

.import-dropzone-formats {
  font-size: 11px;
  color: var(--text2);
  opacity: 0.4;
  margin-top: 12px;
}

.import-file-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--item);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-top: 16px;
}

.import-file-info .material-icons-round {
  font-size: 24px !important;
  color: var(--accent);
}

.import-file-name {
  flex: 1;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ─── Profile View Modal ─── */

.profile-view-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 0;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.profile-view-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--item);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  border: 3px solid var(--accent);
}

.profile-view-avatar .material-icons-round {
  font-size: 40px !important;
  color: var(--accent);
}

.profile-view-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.profile-view-role {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  background: rgba(76, 175, 80, 0.1);
  padding: 3px 10px;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.profile-view-details {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.profile-view-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

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

.profile-view-row .material-icons-round {
  font-size: 18px !important;
  color: var(--accent);
  opacity: 0.6;
  flex-shrink: 0;
}

.profile-view-label {
  font-size: 12px;
  color: var(--text2);
  opacity: 0.7;
  min-width: 80px;
}

.profile-view-value {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  flex: 1;
  text-align: right;
}

/* ─── Confirm Delete Modal ─── */

.confirm-delete-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 0;
}

.confirm-delete-icon {
  font-size: 56px !important;
  color: var(--danger);
  margin-bottom: 16px;
  opacity: 0.8;
}

.confirm-delete-msg {
  font-size: 14px;
  color: var(--text);
  line-height: 1.6;
  max-width: 340px;
}

/* ─── History Modal ─── */

.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.history-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px;
  text-align: center;
  color: var(--text2);
  opacity: 0.5;
}

.history-empty .material-icons-round {
  font-size: 48px !important;
  margin-bottom: 12px;
  opacity: 0.4;
}

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


/* ═══════════════════════════════════════════════════════════════════════════
   13. CONTEXT MENU
   ═══════════════════════════════════════════════════════════════════════════ */

.context-menu {
  position: fixed;
  min-width: 200px;
  background: var(--modal);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  box-shadow: 0 12px 40px var(--shadow);
  z-index: 8000;
  animation: contextMenuAppear 0.12s ease;
}

@keyframes contextMenuAppear {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  transition: background 0.12s ease;
  white-space: nowrap;
}

.context-menu-item:hover {
  background: var(--item-h);
}

.context-menu-item .material-icons-round {
  font-size: 18px !important;
  color: var(--text2);
  opacity: 0.7;
  flex-shrink: 0;
}

.context-menu-label {
  flex: 1;
}

.context-menu-shortcut {
  font-size: 11px;
  color: var(--text2);
  opacity: 0.5;
  margin-left: auto;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.context-menu-separator {
  height: 1px;
  background: var(--border);
  margin: 4px 8px;
}


/* ═══════════════════════════════════════════════════════════════════════════
   14. TOASTS
   ═══════════════════════════════════════════════════════════════════════════ */

.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: var(--modal);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 30px var(--shadow);
  font-size: 13px;
  color: var(--text);
  pointer-events: auto;
  animation: toastSlideIn 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  max-width: 380px;
  min-width: 240px;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

.toast.success {
  border-left: 3px solid var(--success);
}

.toast.success .material-icons-round {
  color: var(--success);
}

.toast.error {
  border-left: 3px solid var(--danger);
}

.toast.error .material-icons-round {
  color: var(--danger);
}

.toast.info {
  border-left: 3px solid var(--accent);
}

.toast.info .material-icons-round {
  color: var(--accent);
}

.toast .material-icons-round {
  font-size: 20px !important;
  flex-shrink: 0;
}

.toast-removing {
  animation: toastSlideOut 0.3s ease forwards;
}

@keyframes toastSlideOut {
  to {
    opacity: 0;
    transform: translateX(40px) scale(0.95);
  }
}


/* ═══════════════════════════════════════════════════════════════════════════
   15. BUTTONS
   ═══════════════════════════════════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 36px;
  padding: 0 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  text-decoration: none;
  user-select: none;
}

.btn .material-icons-round {
  font-size: 18px !important;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: var(--accent-h);
  box-shadow: 0 4px 12px rgba(76, 175, 80, 0.25);
}

.btn-primary:active {
  transform: scale(0.97);
}

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

.btn-secondary:hover {
  background: var(--item-h);
  border-color: var(--text2);
}

.btn-secondary:active {
  transform: scale(0.97);
}

.btn-danger {
  background: var(--danger);
  color: #fff;
  border: none;
}

.btn-danger:hover {
  filter: brightness(1.15);
  box-shadow: 0 4px 12px rgba(211, 47, 47, 0.25);
}

.btn-danger:active {
  transform: scale(0.97);
}

.btn-icon-sm {
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text2);
  transition: all 0.15s ease;
  padding: 0;
  flex-shrink: 0;
}

.btn-icon-sm:hover {
  background: var(--item-h);
  color: var(--text);
}

.btn-icon-sm .material-icons-round {
  font-size: 16px !important;
}


/* ═══════════════════════════════════════════════════════════════════════════
   16. FORMS (inside modals)
   ═══════════════════════════════════════════════════════════════════════════ */

.modal-body .form-group {
  margin-bottom: 18px;
}

.modal-body .form-group:last-child {
  margin-bottom: 0;
}

.modal-body .form-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text2);
  margin-bottom: 6px;
}

.modal-body .form-input {
  width: 100%;
  height: 40px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 14px;
  font-size: 13px;
  color: var(--text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.modal-body .input-icon-wrap .form-input {
  padding-left: 40px;
}

.modal-body .form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.12);
}


/* ═══════════════════════════════════════════════════════════════════════════
   17. SELECTION & CANVAS ELEMENTS
   ═══════════════════════════════════════════════════════════════════════════ */

.selection-box {
  fill: rgba(76, 175, 80, 0.08);
  stroke: var(--accent);
  stroke-width: 1;
  stroke-dasharray: 4 2;
}

.resize-handle {
  fill: #fff;
  stroke: var(--accent);
  stroke-width: 1.5;
  cursor: pointer;
}

.connection-point {
  fill: var(--accent);
  stroke: #fff;
  stroke-width: 1.5;
  opacity: 0;
  transition: opacity 0.15s ease;
  cursor: crosshair;
}

.shape-hovered .connection-point {
  opacity: 1;
}

.snap-guide {
  stroke: var(--accent);
  stroke-width: 0.5;
  stroke-dasharray: 4 2;
  opacity: 0.6;
}

.inline-text-editor {
  position: absolute;
  background: transparent;
  border: 2px solid var(--accent);
  border-radius: 2px;
  padding: 2px 4px;
  font-family: inherit;
  color: var(--text);
  outline: none;
  z-index: 100;
  resize: none;
  overflow: hidden;
  min-width: 40px;
  min-height: 20px;
}


/* ═══════════════════════════════════════════════════════════════════════════
   18. PROJECT CARDS (rendered by JS)
   ═══════════════════════════════════════════════════════════════════════════ */

.project-card {
  background: var(--item);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.project-card:hover {
  border-color: var(--accent);
  background: var(--item-h);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px var(--shadow);
}

.project-card-preview {
  height: 100px;
  background: var(--bg);
  border-radius: 6px;
  margin-bottom: 10px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-card-preview .material-icons-round {
  font-size: 32px !important;
  color: var(--text2);
  opacity: 0.2;
}

.project-card-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-card-date {
  font-size: 11px;
  color: var(--text2);
  opacity: 0.5;
}

.project-card-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.project-card:hover .project-card-actions {
  opacity: 1;
}

.project-card-actions button {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--bg2);
  border: 1px solid var(--border);
  color: var(--text2);
  cursor: pointer;
  transition: all 0.15s ease;
}

.project-card-actions button:hover {
  background: var(--item-h);
  color: var(--text);
}

.project-card-actions .material-icons-round {
  font-size: 16px !important;
}


/* ═══════════════════════════════════════════════════════════════════════════
   19. HISTORY ITEMS (rendered by JS)
   ═══════════════════════════════════════════════════════════════════════════ */

.history-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--item);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.history-item:hover {
  background: var(--item-h);
  border-color: var(--accent);
}

.history-item-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(76, 175, 80, 0.1);
  flex-shrink: 0;
}

.history-item-icon .material-icons-round {
  font-size: 20px !important;
  color: var(--accent);
}

.history-item-info {
  flex: 1;
  min-width: 0;
}

.history-item-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 2px;
}

.history-item-date {
  font-size: 11px;
  color: var(--text2);
  opacity: 0.5;
}

.history-item-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.history-item:hover .history-item-actions {
  opacity: 1;
}


/* ═══════════════════════════════════════════════════════════════════════════
   20. LOADING & SPINNERS
   ═══════════════════════════════════════════════════════════════════════════ */

.loading-spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spinnerRotate 0.7s linear infinite;
}

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

.loading-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
  z-index: 100;
}


/* ═══════════════════════════════════════════════════════════════════════════
   21. TOOLTIPS
   ═══════════════════════════════════════════════════════════════════════════ */

[title] {
  position: relative;
}


/* ═══════════════════════════════════════════════════════════════════════════
   22. UTILITY CLASSES
   ═══════════════════════════════════════════════════════════════════════════ */

.hidden {
  display: none !important;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

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

.text-muted {
  color: var(--text2);
  opacity: 0.5;
}

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

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.gap-4 {
  gap: 4px;
}

.gap-8 {
  gap: 8px;
}

.gap-12 {
  gap: 12px;
}

.mt-8 {
  margin-top: 8px;
}

.mt-16 {
  margin-top: 16px;
}

.mb-8 {
  margin-bottom: 8px;
}

.mb-16 {
  margin-bottom: 16px;
}


/* ═══════════════════════════════════════════════════════════════════════════
   23. ANIMATIONS
   ═══════════════════════════════════════════════════════════════════════════ */

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

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

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.animate-fade-in {
  animation: fadeIn 0.3s ease;
}

.animate-slide-up {
  animation: slideInUp 0.3s ease;
}

.animate-scale-in {
  animation: scaleIn 0.2s ease;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-shake {
  animation: shake 0.3s ease;
}


/* ═══════════════════════════════════════════════════════════════════════════
   24. DRAG & DROP
   ═══════════════════════════════════════════════════════════════════════════ */

.drag-preview {
  position: fixed;
  pointer-events: none;
  z-index: 10000;
  opacity: 0.8;
  transform: translate(-50%, -50%);
}

.drop-indicator {
  position: absolute;
  border: 2px dashed var(--accent);
  border-radius: 4px;
  background: rgba(76, 175, 80, 0.08);
  pointer-events: none;
  z-index: 50;
}

.dragging {
  opacity: 0.5;
}


/* ═══════════════════════════════════════════════════════════════════════════
   25. FOCUS & ACCESSIBILITY
   ═══════════════════════════════════════════════════════════════════════════ */

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.focus-ring:focus-visible {
  box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.3);
}


/* ═══════════════════════════════════════════════════════════════════════════
   26. RESPONSIVE
   ═══════════════════════════════════════════════════════════════════════════ */

@media (max-width: 1200px) {
  .sidebar.right-sidebar {
    width: 260px;
    min-width: 260px;
  }

  .sidebar.left-sidebar {
    width: 240px;
    min-width: 240px;
  }

  .profile-info {
    display: none;
  }
}

@media (max-width: 1024px) {
  .sidebar.left-sidebar {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 60;
    box-shadow: 4px 0 20px var(--shadow);
    width: 280px;
    min-width: 280px;
  }

  .sidebar.right-sidebar {
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    z-index: 60;
    box-shadow: -4px 0 20px var(--shadow);
    width: 300px;
    min-width: 300px;
  }

  .sidebar.left-sidebar.collapsed,
  .sidebar.right-sidebar.collapsed {
    box-shadow: none;
  }
}

@media (max-width: 768px) {
  header {
    height: 48px;
    min-height: 48px;
    padding: 0 8px;
    gap: 8px;
  }

  .header-title {
    font-size: 12px;
    display: none;
  }

  .header-logo-icon {
    font-size: 22px !important;
  }

  .toolbar {
    height: 36px;
    min-height: 36px;
    padding: 0 4px;
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
  }

  .toolbar::-webkit-scrollbar {
    display: none;
  }

  .toolbar-menu-group {
    flex-shrink: 0;
  }

  .toolbar-tool-btn {
    width: 30px;
    height: 30px;
  }

  .toolbar-icon-btn {
    width: 28px;
    height: 28px;
  }

  .zoom-level {
    min-width: 36px;
    font-size: 10px;
  }

  .logout-text {
    display: none;
  }

  .btn-logout {
    padding: 0 8px;
  }

  .profile-info {
    display: none;
  }

  .modal-large {
    width: 95vw;
  }

  .modal-medium {
    width: 95vw;
  }

  .modal-small {
    width: 95vw;
  }

  .projects-toolbar {
    flex-direction: column;
    gap: 8px;
  }

  .projects-search {
    max-width: 100%;
  }

  .projects-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .auth-card {
    padding: 30px 24px;
  }

  .minimap {
    width: 140px;
    height: 105px;
    bottom: 30px;
    right: 8px;
  }
}

@media (max-width: 480px) {
  .header-left {
    gap: 6px;
  }

  .sidebar-toggle-btn {
    width: 32px;
    height: 32px;
  }

  .toolbar-separator {
    margin: 0 3px;
  }

  .auth-card {
    padding: 24px 18px;
    border-radius: 12px;
  }

  .auth-logo-icon {
    font-size: 40px !important;
  }

  .auth-title {
    font-size: 18px;
  }

  .modal-header {
    padding: 14px 18px;
  }

  .modal-body {
    padding: 16px 18px;
  }

  .modal-footer {
    padding: 12px 18px;
    flex-wrap: wrap;
  }

  .modal-footer .btn {
    flex: 1;
    min-width: 100px;
  }

  .export-formats {
    flex-direction: column;
  }

  .export-format-card {
    flex-direction: row;
    padding: 12px 16px;
  }

  .minimap {
    display: none;
  }
}


/* ═══════════════════════════════════════════════════════════════════════════
   27. PRINT
   ═══════════════════════════════════════════════════════════════════════════ */

@media print {
  body {
    background: #fff;
    color: #000;
  }

  header,
  .toolbar,
  .sidebar,
  .minimap,
  .status-bar,
  .toast-container,
  .context-menu,
  .modal-overlay,
  .auth-overlay {
    display: none !important;
  }

  .app-body {
    display: block;
  }

  .canvas-wrapper {
    position: static;
    overflow: visible;
  }

  .canvas-area {
    position: static;
    background: none;
  }

  #svg-canvas {
    width: 100%;
    height: auto;
  }
}


/* ═══════════════════════════════════════════════════════════════════════════
   28. TRANSITIONS (Global Smooth Theme Switching)
   ═══════════════════════════════════════════════════════════════════════════ */

body,
header,
.toolbar,
.sidebar,
.canvas-wrapper,
.canvas-area,
.modal-box,
.auth-card,
.form-input,
.prop-input,
.prop-select,
.prop-color,
.btn,
.dropdown-item,
.context-menu-item,
.shape-item,
.project-card,
.history-item,
.toast {
  transition-property: background-color, border-color, color, box-shadow;
  transition-duration: 0.2s;
  transition-timing-function: ease;
}