/* ============================================================
   STYLES.CSS — Swiss-Tech Horizontal Mindmap Org Chart
   Design: Premium left-to-right tree with organic SVG connectors
   ============================================================ */

/* —————————————————————————————————————————————
   0. FONTS
   ————————————————————————————————————————————— */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700;800&display=swap');

/* —————————————————————————————————————————————
   1. THEME SYSTEM — CSS Custom Properties
   ————————————————————————————————————————————— */
:root {
  /* ---- Fonts ---- */
  --font-title: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;

  /* ---- Level accent colors ---- */
  --color-bod: #7c5dfa;
  --color-dept: #00d2ff;
  --color-lead: #39d353;
  --color-member: #ffb703;
  --color-assistant: #ff5a79;
  --color-vacant: #64748b;

  /* ---- Shared accent ---- */
  --accent: #7c5dfa;
  --accent-soft: rgba(124, 93, 250, 0.18);
  --accent-glow: rgba(124, 93, 250, 0.35);

  /* ---- Transitions ---- */
  --speed-fast: 0.18s;
  --speed-normal: 0.3s;
  --speed-slow: 0.5s;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ---- Spacing ---- */
  --tree-h-gap: 6rem;
  --tree-v-gap: 1.75rem;
  --card-width: 250px;
  --card-radius: 8px;

  /* ---- Z-index layers ---- */
  --z-svg: 1;
  --z-tree: 2;
  --z-header: 50;
  --z-footer: 50;
  --z-zoom: 60;
  --z-drawer-overlay: 90;
  --z-drawer: 100;
  --z-toast: 110;
}

/* ---- DARK THEME (Default) ---- */
:root,
[data-theme='dark'] {
  --bg-primary: #07090e;
  --bg-secondary: #0c0f17;
  --bg-card: rgba(16, 22, 37, 0.75);
  --bg-drawer: #0e1220;
  --bg-input: rgba(16, 22, 37, 0.9);
  --bg-header: rgba(7, 9, 14, 0.72);
  --bg-footer: rgba(7, 9, 14, 0.65);
  --bg-zoom: rgba(12, 15, 23, 0.82);
  --bg-toast: #111627;
  --bg-overlay: rgba(0, 0, 0, 0.55);
  --bg-hover: rgba(124, 93, 250, 0.06);
  --bg-dot: rgba(255, 255, 255, 0.04);

  --text-primary: #e2e8f0;
  --text-secondary: #8892a7;
  --text-tertiary: #505a6e;
  --text-inverse: #07090e;

  --border-card: rgba(255, 255, 255, 0.06);
  --border-line: rgba(255, 255, 255, 0.08);
  --border-input: rgba(255, 255, 255, 0.1);
  --border-drawer: rgba(255, 255, 255, 0.06);

  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.25);
  --shadow-card-hover: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(124, 93, 250, 0.12);
  --shadow-drawer: -6px 0 40px rgba(0, 0, 0, 0.5);
  --shadow-toast: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-header: 0 1px 0 rgba(255, 255, 255, 0.04);

  --connector-opacity: 0.5;
  --glow-color: rgba(124, 93, 250, 0.06);

  --scrollbar-track: #0c0f17;
  --scrollbar-thumb: #1e2438;
  --scrollbar-thumb-hover: #2d3454;

  --success: #39d353;
  --danger: #ff5a79;
  --warning: #ffb703;
}

/* ---- LIGHT THEME ---- */
[data-theme='light'] {
  --bg-primary: #f8f9fc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.88);
  --bg-drawer: #ffffff;
  --bg-input: rgba(241, 243, 249, 0.95);
  --bg-header: rgba(255, 255, 255, 0.78);
  --bg-footer: rgba(248, 249, 252, 0.75);
  --bg-zoom: rgba(255, 255, 255, 0.85);
  --bg-toast: #ffffff;
  --bg-overlay: rgba(15, 23, 42, 0.25);
  --bg-hover: rgba(124, 93, 250, 0.04);
  --bg-dot: rgba(0, 0, 0, 0.04);

  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-inverse: #ffffff;

  --border-card: rgba(0, 0, 0, 0.07);
  --border-line: rgba(0, 0, 0, 0.08);
  --border-input: rgba(0, 0, 0, 0.1);
  --border-drawer: rgba(0, 0, 0, 0.07);

  --shadow-card: 0 1px 4px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-card-hover: 0 8px 28px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(124, 93, 250, 0.15);
  --shadow-drawer: -4px 0 30px rgba(0, 0, 0, 0.08);
  --shadow-toast: 0 4px 18px rgba(0, 0, 0, 0.08);
  --shadow-header: 0 1px 0 rgba(0, 0, 0, 0.05);

  --connector-opacity: 0.55;
  --glow-color: rgba(124, 93, 250, 0.04);

  --scrollbar-track: #f1f3f9;
  --scrollbar-thumb: #cbd5e1;
  --scrollbar-thumb-hover: #94a3b8;

  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
}

/* —————————————————————————————————————————————
   2. RESET & BASE
   ————————————————————————————————————————————— */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.55;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: background-color var(--speed-normal) var(--ease-out),
              color var(--speed-normal) var(--ease-out);
}

/* —————————————————————————————————————————————
   2b. BACKGROUND — Dot-grid + Glow
   ————————————————————————————————————————————— */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    radial-gradient(circle, var(--bg-dot) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: 0 0;
}

body::after {
  content: '';
  position: fixed;
  top: 30%;
  left: 15%;
  width: 600px;
  height: 600px;
  z-index: 0;
  pointer-events: none;
  border-radius: 50%;
  background: var(--glow-color);
  filter: blur(120px);
  opacity: 1;
  transition: background var(--speed-normal) var(--ease-out);
}

/* —————————————————————————————————————————————
   2c. SCROLLBAR
   ————————————————————————————————————————————— */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 99px;
}

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

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

/* —————————————————————————————————————————————
   3. HEADER (.app-header)
   ————————————————————————————————————————————— */
.app-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.55rem 1.5rem;
  background: var(--bg-header);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border-line);
  box-shadow: var(--shadow-header);
  flex-shrink: 0;
  transition: background var(--speed-normal) var(--ease-out),
              border-color var(--speed-normal) var(--ease-out);
}

/* ---- Logo ---- */
.header-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
  cursor: default;
  user-select: none;
}

.logo-icon {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--color-bod), var(--color-dept));
  flex-shrink: 0;
}

.logo-title {
  font-family: var(--font-title);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.logo-subtitle {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

/* ---- Toolbar ---- */
.header-toolbar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

/* ---- Shared input/select style ---- */
.toolbar-search,
.toolbar-filter {
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 6px;
  padding: 0.4rem 0.65rem;
  outline: none;
  transition: border-color var(--speed-fast) var(--ease-out),
              box-shadow var(--speed-fast) var(--ease-out),
              background var(--speed-normal) var(--ease-out);
}

.toolbar-search {
  width: 180px;
}

.toolbar-search::placeholder {
  color: var(--text-tertiary);
}

.toolbar-search:focus,
.toolbar-filter:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.toolbar-filter {
  min-width: 120px;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2364748b'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
  padding-right: 1.6rem;
}

/* ---- Toolbar buttons ---- */
.toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--border-input);
  border-radius: 6px;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--speed-fast) var(--ease-out);
  flex-shrink: 0;
  outline: none;
}

.toolbar-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.toolbar-btn:active {
  transform: scale(0.93);
}

.toolbar-btn.active {
  background: var(--accent);
  color: var(--text-inverse);
  border-color: var(--accent);
}

[data-theme='light'] .toolbar-btn.active {
  color: #fff;
}

/* —————————————————————————————————————————————
   4. CHART VIEWPORT
   ————————————————————————————————————————————— */
.chart-viewport {
  flex: 1 1 auto;
  overflow: auto;
  position: relative;
  z-index: 1;
  cursor: grab;
  -webkit-user-select: none;
  user-select: none;
}

.chart-viewport:active {
  cursor: grabbing;
}

.chart-viewport.is-panning {
  cursor: grabbing;
}

.chart-container {
  position: relative;
  padding: 6rem 12rem;
  min-width: max-content;
  min-height: max-content;
  transform-origin: 10% 50%;
  transition: transform 0.08s linear;
}

/* —————————————————————————————————————————————
   5. SVG CONNECTORS
   ————————————————————————————————————————————— */
.svg-connectors {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: var(--z-svg);
  overflow: visible;
}

.connector-path {
  fill: none;
  stroke-width: 1.6;
  opacity: var(--connector-opacity);
  transition: opacity var(--speed-fast) var(--ease-out),
              stroke var(--speed-fast) var(--ease-out);
}

.connector-path.highlighted {
  opacity: 1;
  stroke-width: 2.2;
  filter: drop-shadow(0 0 4px var(--accent-glow));
}

/* —————————————————————————————————————————————
   6. HORIZONTAL TREE LAYOUT
   ————————————————————————————————————————————— */
.tree-canvas {
  position: relative;
  z-index: var(--z-tree);
  display: inline-block;
}

.node-wrapper {
  display: flex;
  align-items: center;
  gap: var(--tree-h-gap);
}

.children-container {
  display: flex;
  flex-direction: column;
  gap: var(--tree-v-gap);
  justify-content: center;
}

.children-container.children-collapsed {
  display: none !important;
}

/* —————————————————————————————————————————————
   7. NODE CARDS (.node-card)
   ————————————————————————————————————————————— */
.node-card {
  position: relative;
  width: var(--card-width);
  background: var(--bg-card);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border: 1px solid var(--border-card);
  border-left: 3px solid var(--level-color, var(--text-tertiary));
  border-radius: var(--card-radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-card);
  cursor: pointer;
  flex-shrink: 0;
  transition: transform var(--speed-normal) var(--ease-bounce),
              box-shadow var(--speed-normal) var(--ease-out),
              border-color var(--speed-fast) var(--ease-out),
              background var(--speed-normal) var(--ease-out);
}

.node-card:hover {
  transform: scale(1.035) translateX(4px);
  box-shadow: var(--shadow-card-hover);
  z-index: 5;
}

.node-card:hover .card-edit-btn {
  opacity: 1;
  transform: scale(1);
}

.node-card.active-selected {
  border-color: var(--accent);
  box-shadow: var(--shadow-card-hover), 0 0 0 2px var(--accent-soft), 0 0 20px var(--accent-glow);
}

/* ---- Level color classes ---- */
.level-bod   { --level-color: var(--color-bod); }
.level-dept  { --level-color: var(--color-dept); }
.level-lead  { --level-color: var(--color-lead); }
.level-member { --level-color: var(--color-member); }
.level-assistant { --level-color: var(--color-assistant); }
.level-vacant {
  --level-color: var(--color-vacant);
  border-left-style: dashed;
  border-top-style: dashed;
  border-right-style: dashed;
  border-bottom-style: dashed;
}

/* —————————————————————————————————————————————
   8. CARD INTERNALS
   ————————————————————————————————————————————— */

/* ---- Card header ---- */
.card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}

.card-avatar {
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background-color: var(--level-color, var(--text-tertiary));
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-title);
  font-size: 0.65rem;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  overflow: hidden;
}

.card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: inherit;
}

.card-meta {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
  flex: 1;
}

/* ---- Card role ---- */
.card-role {
  font-family: var(--font-title);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.25;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Card title-subtitle (monospace label) ---- */
.card-title-subtitle {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Card personnel ---- */
.card-personnel {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 0.2rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-personnel.is-vacant {
  font-style: italic;
  font-weight: 500;
  color: var(--text-secondary);
}

/* ---- Card description ---- */
.card-description {
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---- Card badge ---- */
.card-badge {
  position: absolute;
  top: 0.45rem;
  right: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 600;
  color: var(--warning);
  border: 1px solid var(--warning);
  border-radius: 3px;
  padding: 0.08rem 0.3rem;
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: transparent;
  pointer-events: none;
}

/* —————————————————————————————————————————————
   9. MICRO-INTERACTIONS
   ————————————————————————————————————————————— */

/* ---- Card edit button ---- */
.card-edit-btn {
  position: absolute;
  top: 0.4rem;
  right: 0.4rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: none;
  background: var(--bg-input);
  color: var(--text-secondary);
  font-size: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--speed-fast) var(--ease-out);
  z-index: 3;
}

.card-edit-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: scale(1.1);
}

/* ---- Collapse toggle ---- */
.collapse-toggle {
  position: absolute;
  right: -13px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: 1px solid var(--border-line);
  background: var(--bg-drawer);
  color: var(--text-secondary);
  font-size: 0.55rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 4;
  transition: all var(--speed-fast) var(--ease-out);
  outline: none;
  padding: 0;
  line-height: 1;
}

.collapse-toggle:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateY(-50%) scale(1.15);
}

.collapse-toggle.is-collapsed {
  transform: translateY(-50%) rotate(180deg);
}

.collapse-toggle.is-collapsed:hover {
  transform: translateY(-50%) rotate(180deg) scale(1.15);
}

/* —————————————————————————————————————————————
   10. SEARCH HIGHLIGHTS
   ————————————————————————————————————————————— */
@keyframes pulse-border {
  0%, 100% {
    border-color: var(--border-card);
    box-shadow: var(--shadow-card);
  }
  50% {
    border-color: var(--accent);
    box-shadow: var(--shadow-card), 0 0 0 3px var(--accent-soft);
  }
}

.node-card.search-match {
  animation: pulse-border 1.8s ease-in-out infinite;
  z-index: 6;
}

.node-card.search-mismatch {
  opacity: 0.15;
  filter: grayscale(90%);
  pointer-events: none;
  transition: opacity var(--speed-normal) var(--ease-out),
              filter var(--speed-normal) var(--ease-out);
}

/* —————————————————————————————————————————————
   11. FOOTER (.app-footer)
   ————————————————————————————————————————————— */
.app-footer {
  position: sticky;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-footer);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.4rem 1.5rem;
  background: var(--bg-footer);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-top: 1px solid var(--border-line);
  flex-shrink: 0;
  transition: background var(--speed-normal) var(--ease-out),
              border-color var(--speed-normal) var(--ease-out);
}

.footer-stats {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.footer-stat {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-tertiary);
  letter-spacing: 0.03em;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.footer-stat .stat-value {
  color: var(--text-secondary);
  font-weight: 600;
}

.footer-tips {
  font-family: var(--font-body);
  font-size: 0.6rem;
  color: var(--text-tertiary);
  white-space: nowrap;
}

.footer-tips kbd {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 3px;
  padding: 0.05rem 0.3rem;
  margin: 0 0.1rem;
  line-height: 1.4;
}

/* —————————————————————————————————————————————
   12. SIDE DRAWER
   ————————————————————————————————————————————— */

/* ---- Overlay ---- */
.drawer-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-drawer-overlay);
  background: var(--bg-overlay);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--speed-normal) var(--ease-out),
              visibility var(--speed-normal) var(--ease-out);
}

.drawer-overlay.is-visible {
  opacity: 1;
  visibility: visible;
}

/* ---- Panel ---- */
.side-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 400px;
  max-width: 100vw;
  z-index: var(--z-drawer);
  background: var(--bg-drawer);
  border-left: 1px solid var(--border-drawer);
  box-shadow: var(--shadow-drawer);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--speed-normal) var(--ease-out);
  overflow: hidden;
}

.side-drawer.is-open {
  transform: translateX(0);
}

/* ---- Drawer header ---- */
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-line);
  flex-shrink: 0;
}

.drawer-title {
  font-family: var(--font-title);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.drawer-close-btn {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border-input);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--speed-fast) var(--ease-out);
}

.drawer-close-btn:hover {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

/* ---- Drawer body ---- */
.drawer-body {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 1.25rem;
}

/* ---- Form groups ---- */
.form-group {
  margin-bottom: 1.1rem;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}

.form-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-input-icon {
  position: absolute;
  left: 0.65rem;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  pointer-events: none;
  z-index: 1;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-input);
  border-radius: 6px;
  padding: 0.55rem 0.7rem;
  outline: none;
  transition: border-color var(--speed-fast) var(--ease-out),
              box-shadow var(--speed-fast) var(--ease-out);
}

.form-input.has-icon,
.form-select.has-icon {
  padding-left: 2rem;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-textarea {
  resize: vertical;
  min-height: 70px;
  font-family: var(--font-body);
  line-height: 1.5;
}

.form-select {
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2364748b'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
  padding-right: 1.6rem;
}

/* ---- Color palette picker ---- */
.color-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.color-swatch {
  position: relative;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--speed-fast) var(--ease-out);
}

.color-swatch:hover {
  transform: scale(1.15);
}

.color-swatch input[type='radio'] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  margin: 0;
}

.color-swatch.selected,
.color-swatch:has(input:checked) {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px var(--bg-drawer), 0 0 0 4px var(--text-secondary);
  transform: scale(1.1);
}

/* ---- Drawer footer (actions) ---- */
.drawer-footer {
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--border-line);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.btn {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: all var(--speed-fast) var(--ease-out);
  outline: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.96);
}

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

.btn-success:hover {
  filter: brightness(1.12);
  box-shadow: 0 4px 14px rgba(57, 211, 83, 0.3);
}

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

.btn-danger:hover {
  background: var(--danger);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 90, 121, 0.3);
}

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

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--text-secondary);
}

/* —————————————————————————————————————————————
   13. TOAST NOTIFICATIONS
   ————————————————————————————————————————————— */
.toast-container {
  position: fixed;
  bottom: 1.25rem;
  left: 1.25rem;
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column-reverse;
  gap: 0.6rem;
  pointer-events: none;
}

@keyframes toast-slide-in {
  from {
    opacity: 0;
    transform: translateX(-24px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes toast-slide-out {
  from {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateX(-24px) scale(0.95);
  }
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-width: 260px;
  max-width: 380px;
  padding: 0.7rem 1rem;
  background: var(--bg-toast);
  border: 1px solid var(--border-card);
  border-left: 3px solid var(--toast-color, var(--accent));
  border-radius: 6px;
  box-shadow: var(--shadow-toast);
  animation: toast-slide-in var(--speed-normal) var(--ease-out) forwards;
}

.toast.is-exiting {
  animation: toast-slide-out var(--speed-fast) var(--ease-out) forwards;
}

.toast-success { --toast-color: var(--success); }
.toast-danger  { --toast-color: var(--danger); }
.toast-warning { --toast-color: var(--warning); }
.toast-info    { --toast-color: var(--color-dept); }

.toast-icon {
  font-size: 0.9rem;
  flex-shrink: 0;
}

.toast-message {
  font-size: 0.75rem;
  color: var(--text-primary);
  line-height: 1.4;
  flex: 1;
}

.toast-close {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 0.7rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: color var(--speed-fast);
}

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

/* —————————————————————————————————————————————
   14. ZOOM CONTROLS
   ————————————————————————————————————————————— */
.zoom-controls {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  z-index: var(--z-zoom);
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--bg-zoom);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid var(--border-line);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.zoom-btn {
  width: 34px;
  height: 34px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--speed-fast) var(--ease-out);
  outline: none;
  border-bottom: 1px solid var(--border-line);
}

.zoom-btn:last-child {
  border-bottom: none;
}

.zoom-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
}

.zoom-btn:active {
  transform: scale(0.9);
}

.zoom-level {
  width: 34px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.5rem;
  font-weight: 600;
  color: var(--text-tertiary);
  border-bottom: 1px solid var(--border-line);
  user-select: none;
  cursor: default;
}

/* —————————————————————————————————————————————
   15. RESPONSIVE
   ————————————————————————————————————————————— */
@media (max-width: 768px) {
  .app-header {
    flex-wrap: wrap;
    padding: 0.5rem 0.75rem;
    gap: 0.5rem;
  }

  .header-logo {
    flex: 1 1 auto;
  }

  .header-toolbar {
    flex: 1 1 100%;
    flex-wrap: wrap;
    order: 2;
    gap: 0.4rem;
  }

  .toolbar-search {
    flex: 1 1 auto;
    width: auto;
    min-width: 120px;
  }

  .toolbar-filter {
    flex: 1 1 auto;
    min-width: 100px;
  }

  .side-drawer {
    width: 100%;
    max-width: 100vw;
  }

  .chart-container {
    padding: 3rem 4rem;
  }

  .footer-tips {
    display: none;
  }

  .toast-container {
    left: 0.75rem;
    bottom: 0.75rem;
  }

  .zoom-controls {
    bottom: 0.75rem;
    right: 0.75rem;
  }
}

@media (max-width: 480px) {
  :root {
    --tree-h-gap: 3rem;
    --tree-v-gap: 1.25rem;
    --card-width: 200px;
  }

  .chart-container {
    padding: 2rem 2rem;
  }

  .logo-subtitle {
    display: none;
  }
}

/* —————————————————————————————————————————————
   16. PRINT
   ————————————————————————————————————————————— */
@media print {
  body {
    background: #fff !important;
    color: #1e293b !important;
    overflow: visible !important;
  }

  body::before,
  body::after {
    display: none !important;
  }

  .app-header,
  .app-footer,
  .side-drawer,
  .drawer-overlay,
  .zoom-controls,
  .toast-container,
  .card-edit-btn,
  .collapse-toggle {
    display: none !important;
  }

  .chart-viewport {
    overflow: visible !important;
    cursor: auto !important;
  }

  .chart-container {
    padding: 1rem !important;
    transform: none !important;
  }

  .node-card {
    background: #fff !important;
    backdrop-filter: none !important;
    border: 1px solid #d1d5db !important;
    border-left: 3px solid var(--level-color, #64748b) !important;
    box-shadow: none !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
    break-inside: avoid;
  }

  .svg-connectors {
    opacity: 0.4 !important;
  }

  .connector-path {
    stroke: #6b7280 !important;
    opacity: 0.5 !important;
  }
}

/* —————————————————————————————————————————————
   17. UTILITY CLASSES
   ————————————————————————————————————————————— */
.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;
}

.hidden {
  display: none !important;
}

.no-select {
  -webkit-user-select: none;
  user-select: none;
}

.truncate {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* —————————————————————————————————————————————
   18. ANIMATIONS — Entrance
   ————————————————————————————————————————————— */
@keyframes node-enter {
  from {
    opacity: 0;
    transform: translateX(-16px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

.node-card {
  animation: node-enter var(--speed-slow) var(--ease-out) backwards;
}

/* Stagger children via inline --delay custom property */
.node-card[style*='--delay'] {
  animation-delay: var(--delay);
}

/* —————————————————————————————————————————————
   19. FOCUS VISIBLE (Accessibility)
   ————————————————————————————————————————————— */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.node-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  box-shadow: var(--shadow-card-hover), 0 0 0 4px var(--accent-soft);
}

/* —————————————————————————————————————————————
   20. SELECTION
   ————————————————————————————————————————————— */
::selection {
  background: var(--accent-soft);
  color: var(--text-primary);
}