/* =========================================================
RESET
========================================================= */

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--zx-bg);
  font-family: 'Sora', sans-serif;
  color: var(--zx-text-primary);
}

/* =========================================================
APP
========================================================= */

.zx-app {
  width: 100%;
  height: 100vh;
  display: flex;
  background: var(--zx-bg);
  overflow: hidden;
}

/* =========================================================
SIDEBAR
========================================================= */

.zx-sidebar {
  width: 320px;
  min-width: 320px;
  background: linear-gradient(180deg, #080C1C, #03050E);
  border-right: 1px solid var(--zx-border);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--zx-anim-normal);
  max-height: 100vh;
}

.zx-app.collapsed .zx-sidebar {
  width: 88px;
  min-width: 88px;
}

.zx-sidebar::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, rgba(0, 132, 255, 0.4), transparent);
}

/* =========================================================
HEADER
========================================================= */

.zx-sidebar-header {
  padding: var(--zx-space-6) var(--zx-space-5) var(--zx-space-5);
  border-bottom: 1px solid var(--zx-border);
}

.zx-brand-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.zx-logo {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: var(--zx-anim-normal);
}

.zx-sidebar .zx-logo #zx-logo-collapsed {
  display: none;
}

.zx-app.collapsed .zx-sidebar .zx-logo #zx-logo {
  display: none;
}

.zx-app.collapsed .zx-sidebar .zx-logo #zx-logo-collapsed {
  display: block;
  width: 48px;
}

.zx-logo img {
  max-width: 120px;
}

.zx-logo span {
  font-size: 34px;
  font-weight: 900;
  letter-spacing: -0.12em;
}

.zx-tagline {
  margin-top: var(--zx-space-3);
  font-size: var(--zx-fs-1);
  letter-spacing: 0.24em;
  color: #64748B;
  transition: var(--zx-anim-normal);
}

.zx-app.collapsed .zx-sidebar .zx-tagline {
  opacity: 0;
}

.zx-collapse-btn {
  margin-left: auto;
  width: 36px;
  height: 36px;
  position: absolute;
  right: -36px;
  border: none;
  color: #0084FF;
  border-radius: var(--zx-space-3);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  cursor: pointer;
}

/* =========================================================
SEARCH
========================================================= */

.zx-search {
  margin-top: var(--zx-space-6);
  height: 44px;
  border-radius: var(--zx-space-4);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  gap: var(--zx-space-3);
  padding: 0 var(--zx-space-3);
}

.zx-search input {
  flex: 1;
  border: none;
  outline: none;
  background: none;
  color: var(--zx-text-primary);
  font-size: 13px;
}

.zx-search input::placeholder {
  color: #64748B;
}

.zx-search-shortcut {
  height: var(--zx-space-6);
  padding: 0 var(--zx-space-2);
  border-radius: var(--zx-space-2);
  background: rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  font-size: var(--zx-fs-1);
  color: #64748B;
}

.zx-app.collapsed .zx-sidebar .zx-search input,
.zx-app.collapsed .zx-sidebar .zx-search-shortcut {
  display: none;
}

/* =========================================================
NAVIGATION
========================================================= */

.zx-sidebar-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--zx-space-5) var(--zx-space-2) 80px;
}

.zx-nav-section {
  margin-bottom: 28px;
}

.zx-nav-title {
  padding-left: var(--zx-space-3);
  margin-bottom: var(--zx-space-3);
  font-size: var(--zx-fs-1);
  letter-spacing: 0.24em;
  color: #64748B;
}

.zx-app.collapsed .zx-sidebar .zx-nav-title {
  opacity: 0;
}

.zx-nav-stack {
  display: flex;
  flex-direction: column;
  gap: var(--zx-space-1);
}

.zx-nav-btn {
  width: 100%;
  height: 36px;
  border: none;
  border-radius: var(--zx-space-3);
  background: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--zx-space-3);
  color: #CBD5E1;
  font-size: 13px;
  cursor: pointer;
  transition: var(--zx-anim-fast);
}

.zx-nav-btn:hover {
  background: rgba(var(--zx-primary), 0.3);
}

.zx-nav-left {
  display: flex;
  align-items: center;
  gap: var(--zx-space-3);
}

.zx-app.collapsed .zx-sidebar .zx-nav-left span {
  display: none;
}

.zx-nav-btn i {
  width: var(--zx-space-4);
  height: var(--zx-space-4);
  color: #94A3B8;
}

.zx-nav-active {
  border-radius: var(--zx-space-3);
  background: rgba(0, 132, 255, 0.08);
  border: 1px solid rgba(0, 132, 255, 0.2);
  overflow: hidden;
}

.zx-nav-active-header {
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--zx-space-3);
  position: relative;
  cursor: pointer;
}

.zx-nav-active-line {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 18px;
  background: #0084FF;
  border-radius: 999px;
}

.zx-chevron {
  transition: var(--zx-anim-normal);
}

.zx-nav-active.closed .zx-chevron {
  transform: rotate(-90deg);
}

.zx-submenu {
  margin-left: 32px;
  padding-left: var(--zx-space-3);
  padding-bottom: var(--zx-space-2);
  border-left: 1px solid var(--zx-border);
  max-height: 220px;
  overflow: hidden;
  transition: var(--zx-anim-normal);
}

.zx-nav-active.closed .zx-submenu {
  max-height: 0;
  padding-bottom: 0;
}

.zx-app.collapsed .zx-sidebar .zx-submenu {
  display: none;
}

.zx-submenu-item {
  height: 32px;
  display: flex;
  align-items: center;
  padding-left: var(--zx-space-3);
  border-radius: var(--zx-space-2);
  color: #94A3B8;
  font-size: var(--zx-fs-2);
}

.zx-submenu-item.active {
  background: rgba(255, 255, 255, 0.03);
  color: var(--zx-primary);
}

/* =========================================================
MAIN
========================================================= */

.zx-main {
  flex: 1;
  overflow-y: auto;
}

.zx-app.collapsed .zx-main {
  width: 100%;
}

/* =========================================================
TOPBAR
========================================================= */

.zx-topbar {
  height: 68px;
  border-bottom: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  padding: 0 32px;
  position: sticky;
  top: 0;
  background: rgba(5, 8, 22, 0.8);
  backdrop-filter: blur(20px);
  z-index: 20;
}

.zx-breadcrumbs {
  margin: 0 0 0 var(--zx-space-7);
  display: flex;
  align-items: center;
  gap: var(--zx-space-3);
  font-size: 13px;
  color: #64748B;
}

.zx-breadcrumbs .active {
  color: var(--zx-primary);
}

/* =========================================================
CONTENT
========================================================= */

.zx-content {
  width: 860px;
  padding: var(--zx-space-7);
}

.zx-hero h1 {
  font-size: 56px;
  letter-spacing: -0.06em;
  margin-bottom: var(--zx-space-5);
}

.zx-hero p {
  max-width: 720px;
  font-size: var(--zx-fs-3);
  line-height: 2;
  color: #94A3B8;
}

.zx-hero-meta {
  margin-top: var(--zx-space-6);
  display: flex;
  gap: var(--zx-space-3);
}

.zx-meta-pill {
  height: 32px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  gap: var(--zx-space-2);
  font-size: var(--zx-fs-2);
  color: #CBD5E1;
}

.zx-meta-dot {
  width: var(--zx-space-2);
  height: var(--zx-space-2);
  border-radius: 999px;
  background: #22C55E;
}

/* =========================================================
SECTION
========================================================= */

.zx-section {
  margin-top: 48px;
}

.zx-section-label {
  margin-bottom: var(--zx-space-4);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: #94A3B8;
}

/* =========================================================
CARD
========================================================= */

.zx-card {
  border-radius: var(--zx-space-6);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--zx-border);
  overflow: hidden;
  box-shadow: 0 0 80px rgba(0, 0, 0, 0.35);
}

/* =========================================================
PREVIEW TOOLBAR
========================================================= */

.zx-preview-toolbar {
  height: 56px;
  border-bottom: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--zx-space-4);
}

.zx-preview-devices {
  display: flex;
  gap: var(--zx-space-2);
}

.zx-device-btn,
.zx-copy-btn {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: var(--zx-space-3);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748B;
  cursor: pointer;
}

.zx-device-btn.active {
  background: rgba(0, 132, 255, 0.1);
  border: 1px solid rgba(0, 132, 255, 0.2);
  color: var(--zx-text-primary);
}

/* =========================================================
CANVAS
========================================================= */

.zx-preview-canvas {
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: var(--zx-anim-normal);
}

.zx-preview-canvas.tablet {
  max-width: 720px;
  margin: auto;
}

.zx-preview-canvas.mobile {
  max-width: 390px;
  margin: auto;
}

.zx-preview-glow {
  position: absolute;
  width: 520px;
  height: 140px;
  background: radial-gradient(ellipse, rgba(0, 132, 255, 0.18), transparent 70%);
  filter: blur(32px);
}

.zx-primary-btn {
  position: relative;
  z-index: 10;
  height: 56px;
  padding: 0 56px;
  border: none;
  border-radius: var(--zx-space-4);
  background: linear-gradient(to bottom, #0F6BFF, #0148D2);
  color: var(--zx-text-primary);
  letter-spacing: 0.22em;
  box-shadow: 0 0 40px rgba(0, 132, 255, 0.24);
}

/* =========================================================
CODE
========================================================= */

.zx-code-header {
  height: 56px;
  border-bottom: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
}

.zx-code-tabs {
  display: flex;
  gap: var(--zx-space-5);
}

.zx-code-tab {
  height: 56px;
  border: none;
  background: none;
  color: #64748B;
  font-size: 13px;
  position: relative;
  cursor: pointer;
}

.zx-code-tab.active {
  color: var(--zx-text-primary);
}

.zx-code-tab.active::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: #0084FF;
}

.zx-copy-code {
  height: 36px;
  padding: 0 14px;
  border: none;
  border-radius: var(--zx-space-3);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  gap: 10px;
  color: #CBD5E1;
}

.zx-code-preview {
  padding: var(--zx-space-6);
  font-family: monospace;
  font-size: var(--zx-fs-2);
  line-height: 2;
  overflow: auto;
}

.token-tag {
  color: #60A5FA;
}

.token-attr {
  color: #C084FC;
}

.token-string {
  color: #4ADE80;
}

.token-text {
  color: #FBBF24;
}

/* =========================================================
ANATOMY
========================================================= */

.zx-anatomy-card {
  min-height: 260px;
}

.zx-anatomy-preview {
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.zx-anatomy-line {
  position: absolute;
  background: rgba(255, 255, 255, 0.12);
}

.zx-anatomy-line-x {
  width: 120px;
  height: 1px;
  top: 118px;
  left: 170px;
}

.zx-anatomy-line-y {
  width: 1px;
  height: 60px;
  top: 92px;
  left: 392px;
}

.zx-anatomy-label {
  position: absolute;
  font-size: var(--zx-fs-2);
  color: #94A3B8;
}

.zx-anatomy-label.padding {
  top: 100px;
  left: 42px;
}

.zx-anatomy-label.height {
  top: 70px;
  left: 408px;
}

.zx-anatomy-label.radius {
  bottom: 74px;
  right: 160px;
}

.zx-anatomy-label.typography {
  bottom: 42px;
}

/* =========================================================
RIGHT RAIL
========================================================= */

.zx-right-rail {
  width: 320px;
  min-width: 320px;
  border-left: 1px solid var(--zx-border);
  padding: 80px var(--zx-space-5) var(--zx-space-7);
  overflow-y: auto;
}

.zx-rail-card {
  border-radius: 22px;
  border: 1px solid var(--zx-border);
  background: rgba(255, 255, 255, 0.02);
  padding: var(--zx-space-5);
  margin-bottom: var(--zx-space-5);
}

.zx-rail-title {
  margin-bottom: var(--zx-space-5);
  font-size: var(--zx-fs-1);
  letter-spacing: 0.24em;
  color: #64748B;
}

.zx-rail-links {
  display: flex;
  flex-direction: column;
  gap: var(--zx-space-4);
}

.zx-rail-links a {
  color: #94A3B8;
  font-size: var(--zx-fs-2);
  text-decoration: none;
}

.zx-rail-links a.active {
  color: var(--zx-primary);
}

.zx-rail-description {
  font-size: var(--zx-fs-2);
  line-height: 1.8;
  color: #94A3B8;
}

.zx-quick-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.zx-quick-btn {
  width: 100%;
  height: 42px;
  border: none;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--zx-border);
  display: flex;
  align-items: center;
  gap: var(--zx-space-3);
  padding: 0 14px;
  color: #CBD5E1;
}

.zx-version-number {
  font-size: var(--zx-fs-6);
  font-weight: 600;
}

.zx-version-meta {
  margin-top: var(--zx-space-2);
  font-size: var(--zx-fs-2);
  color: #64748B;
}