/* ==========================================================================
   AMEVA Ecosystem - Canonical Unified Design System (SSOT v3.0)
   Standard: 58px Fixed Header (2px #004499 line), 270px Unified Left Sidebar,
             High-Clarity Enterprise Open-Source (Apache/Tomcat Tech Hybrid)
   Standardized Rounded Pill Active Links, Zero-Jitter Clean Layout
   ========================================================================== */

:root {
  /* Brand Tokens */
  --primary-color: #004499;
  --primary-dark: #002b66;
  --primary-light: #e8f0fe;
  --accent-cyan: #00f5d4;
  --accent-blue: #2563eb;
  --accent-amber: #b45309;
  --accent-green: #16a34a;

  /* Surfaces & Backgrounds */
  --bg-main: #ffffff;
  --bg-surface: #f8f9fa;
  --bg-alt: #f1f5f9;
  --bg-card: #ffffff;

  /* Borders & Dividers */
  --border-color: #cbd5e1;
  --border-subtle: #e2e8f0;
  --border-strong: #94a3b8;

  /* Typography Colors */
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #64748b;

  /* Code & Terminals */
  --code-bg: #0b132b;
  --code-text: #f8fafc;
  --code-border: #1e293b;

  /* Layout Metrics */
  --sidebar-width: 270px;
  --header-height: 58px;
  --content-max-width: 1040px;

  /* Fonts */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-width: 320px;
}

/* ── Top Header ──────────────────────────────────────────────────────────── */
header {
  background-color: var(--bg-surface);
  border-bottom: 2px solid var(--primary-color);
  padding: 0 20px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  overflow: hidden;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-main);
  min-width: 0;
  flex-shrink: 1;
}

.header-brand img {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.header-brand h1 {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--primary-color);
  letter-spacing: -0.01em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.release-tag {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border: 1px solid #bfdbfe;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
  white-space: nowrap;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.12s ease;
  white-space: nowrap;
  cursor: pointer;
}

.header-btn:hover {
  background-color: var(--bg-alt);
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.header-btn.primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  color: #ffffff;
}

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

.lang-select {
  padding: 4px 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
  background-color: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.lang-select:focus {
  border-color: var(--primary-color);
}

/* ── Layout Container ─────────────────────────────────────────────────────── */
.container {
  display: flex;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
  min-height: calc(100vh - var(--header-height) - 60px);
}

/* ── Unified Master Left Sidebar ─────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background-color: var(--bg-surface);
  border-right: 1px solid var(--border-color);
  padding: 20px 14px;
  box-sizing: border-box;
  flex-shrink: 0;
}

.sidebar h3 {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 18px 0 6px 0;
  padding-left: 8px;
  border-left: 3px solid var(--primary-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

.sidebar h3:first-of-type {
  margin-top: 0;
}

.sidebar h3 .accordion-icon {
  font-size: 0.75rem;
  color: var(--text-subtle);
  transition: transform 0.15s ease;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0 0 10px 0;
}

.sidebar ul.collapsed {
  display: none;
}

.sidebar li {
  margin-bottom: 2px;
}

.sidebar a {
  display: block;
  padding: 6px 10px;
  color: var(--text-main);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 4px;
  transition: all 0.12s ease;
  line-height: 1.35;
}

.sidebar a:hover {
  background-color: var(--bg-alt);
  color: var(--primary-color);
}

/* 🌟 Standardized 100% Rounded Pill Active Link (Sentinel Standard) */
.sidebar a.active,
.sidebar li a.active,
.sidebar a.active strong,
.sidebar li a.active strong {
  background-color: var(--primary-light) !important;
  color: var(--primary-color) !important;
  font-weight: 700 !important;
  border-left: none !important;
}

/* ── Content Area ────────────────────────────────────────────────────────── */
.content {
  flex: 1;
  padding: 32px 40px;
  max-width: var(--content-max-width);
  min-width: 0;
}

.content h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.content .subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.5;
}

.content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 32px 0 12px 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}

.content p {
  margin-bottom: 16px;
  color: var(--text-main);
  line-height: 1.65;
}

.content ul, .content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.content li {
  margin-bottom: 6px;
}

/* ── Tables & Cards ──────────────────────────────────────────────────────── */
.data-table, table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px 0;
  font-size: 0.9rem;
}

.data-table th, table th,
.data-table td, table td {
  padding: 10px 14px;
  border: 1px solid var(--border-color);
  text-align: left;
}

.data-table th, table th {
  background-color: var(--bg-surface);
  font-weight: 700;
  color: var(--text-main);
}

.data-table tr:hover, table tr:hover {
  background-color: var(--bg-surface);
}

.badges-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.alert {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--primary-color);
  padding: 14px 18px;
  border-radius: 4px;
  margin: 18px 0;
}

.alert.alert-tip {
  border-left-color: var(--accent-green);
  background-color: #f0fdf4;
}

.alert.alert-warning {
  border-left-color: var(--accent-amber);
  background-color: #fffbeb;
}

.alert-title {
  display: block;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--text-main);
}

/* ── Code Blocks ─────────────────────────────────────────────────────────── */
pre {
  background-color: var(--code-bg);
  color: var(--code-text);
  padding: 14px 18px;
  border-radius: 6px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.5;
  margin: 14px 0 20px 0;
  position: relative;
  border: 1px solid var(--code-border);
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background-color: var(--bg-alt);
  color: var(--primary-dark);
  padding: 2px 5px;
  border-radius: 3px;
}

pre code {
  background: none;
  color: inherit;
  padding: 0;
}

.copy-code-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: #1e293b;
  color: #94a3b8;
  border: 1px solid #334155;
  padding: 3px 8px;
  font-size: 0.72rem;
  font-weight: 600;
  border-radius: 3px;
  cursor: pointer;
}

.copy-code-btn:hover {
  background: #334155;
  color: #f8fafc;
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border-color);
  background-color: var(--bg-surface);
  padding: 20px 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ── Responsive Hamburger & Mobile Drawer ────────────────────────────────── */
.menu-toggle-btn {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
}

@media (max-width: 960px) {
  .menu-toggle-btn {
    display: inline-flex;
  }
  .sidebar {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    bottom: 0;
    z-index: 99;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    transition: left 0.2s ease;
    overflow-y: auto;
  }
  .sidebar.mobile-open {
    left: 0;
  }
  .content {
    padding: 20px;
  }
}


/* ── Desktop Sidebar Collapse Toggle Handle (문서철 접기/펼치기 탭) ────────── */
.sidebar {
  position: relative;
  transition: width 0.2s cubic-bezier(0.4, 0, 0.2, 1), padding 0.2s ease, min-width 0.2s ease;
}

.sidebar.desktop-collapsed {
  width: 0 !important;
  min-width: 0 !important;
  padding: 0 !important;
  border-right: none !important;
  overflow: hidden !important;
  visibility: hidden;
}

.container.sidebar-collapsed .content {
  max-width: 1200px;
}

.sidebar-toggle-tab {
  position: absolute;
  top: 140px;
  right: -12px;
  width: 20px;
  height: 42px;
  background: #ffffff;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 60;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.08);
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
  transition: all 0.15s ease;
  user-select: none;
}

.sidebar-toggle-tab:hover {
  background-color: var(--primary-light);
  color: var(--primary-color);
  border-color: var(--primary-color);
  box-shadow: 0 2px 8px rgba(0, 68, 153, 0.18);
}

.sidebar-toggle-tab.collapsed-tab {
  position: fixed;
  left: 0;
  top: 198px;
  right: auto;
  border-left: none;
  border-radius: 0 4px 4px 0;
  background: #ffffff;
  border-color: var(--primary-color);
  color: var(--primary-color);
  box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.12);
}

/* ── Menu Button Responsive Rules ────────────────────────────────────────── */
.menu-toggle-btn {
  display: none;
}

@media (min-width: 961px) {
  .menu-toggle-btn {
    display: none !important; /* Wide screen: Hide top header menu button */
  }
}

@media (max-width: 960px) {
  .menu-toggle-btn {
    display: inline-flex !important; /* Mobile/Tablet: Show in top header */
  }
  .sidebar-toggle-tab {
    display: none !important; /* Mobile: Hide desktop sidebar tab */
  }
}

/* ==========================================================================
   AMEVA Ecosystem - Premium Mobile & Tablet UX Architecture (v4.0)
   Features:
   - 2-Tier Clean Sticky Header on Mobile (Logo + Lang on Top, 3 Pill Buttons Below)
   - 100% Full Width Responsive Stack Layout (Accordion Nav on Top, Full Content Below)
   - Zero Overlapping, Zero Text Squishing, Ultra-Crisp Touch Targets
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --header-height: auto;
  }

  header {
    height: auto !important;
    min-height: 48px;
    padding: 8px 12px !important;
    flex-wrap: wrap !important;
    gap: 8px 0 !important;
    position: sticky !important;
    top: 0 !important;
    z-index: 1000 !important;
    background: var(--bg-surface, #f8f9fa) !important;
    border-bottom: 2px solid var(--primary-color, #004499) !important;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08) !important;
  }

  .header-brand {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex: 1 1 auto !important;
    min-width: 0 !important;
    max-width: calc(100% - 125px) !important;
    text-decoration: none !important;
  }

  .header-brand img {
    width: 24px !important;
    height: 24px !important;
    flex-shrink: 0 !important;
  }

  .header-brand h1 {
    font-size: 0.92rem !important;
    font-weight: 800 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    margin: 0 !important;
    color: var(--primary-color, #004499) !important;
  }

  .header-controls {
    display: flex !important;
    align-items: center !important;
    justify-content: flex-end !important;
    flex-wrap: wrap !important;
    gap: 6px !important;
    flex: 1 0 auto !important;
  }

  .release-tag {
    display: none !important;
  }

  .lang-selector-wrapper {
    margin: 0 !important;
  }

  .lang-select {
    padding: 4px 6px !important;
    font-size: 0.76rem !important;
    border-radius: 4px !important;
    height: 28px !important;
    max-width: 110px !important;
  }

  /* 🌟 Beautiful Mobile Pill Action Ribbon (Sponsor, Repo, Founder) */
  .header-controls .header-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 4px 9px !important;
    font-size: 0.74rem !important;
    font-weight: 600 !important;
    line-height: 1 !important;
    height: 26px !important;
    border-radius: 13px !important; /* Premium Pill Shape */
    box-sizing: border-box !important;
    text-decoration: none !important;
    white-space: nowrap !important;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05) !important;
  }

  /* Full Width Stack Container & Sidebar */
  .container {
    display: flex !important;
    flex-direction: column !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    padding: 0 !important;
    margin: 0 !important;
  }

  @keyframes mobileSlideDown {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .sidebar {
    display: none !important; /* Collapsed by default on mobile, toggles with Menu button */
    position: static !important;
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    left: 0 !important;
    bottom: auto !important;
    border-right: none !important;
    border-bottom: 2px solid var(--primary-color, #004499) !important;
    padding: 12px 14px !important;
    box-sizing: border-box !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08) !important;
    overflow: visible !important;
    background-color: var(--bg-surface, #f8f9fa) !important;
  }

  .sidebar.mobile-open {
    display: block !important;
    animation: mobileSlideDown 0.18s ease-out !important;
  }

  .menu-toggle-btn.active {
    background-color: var(--primary-light, #e8f0fe) !important;
    color: var(--primary-color, #004499) !important;
    border-color: var(--primary-color, #004499) !important;
    box-shadow: inset 0 1px 2px rgba(0, 68, 153, 0.15) !important;
  }

  .content {
    width: 100% !important;
    min-width: 100% !important;
    max-width: 100% !important;
    padding: 18px 14px !important;
    box-sizing: border-box !important;
    flex: none !important;
  }

  .content h2 {
    font-size: 1.35rem !important;
    line-height: 1.3 !important;
  }

  .content .subtitle {
    font-size: 0.92rem !important;
    margin-bottom: 16px !important;
  }

  .sidebar-toggle-tab {
    display: none !important;
  }
}

@media (max-width: 420px) {
  .header-brand h1 {
    font-size: 0.82rem !important;
    max-width: 130px !important;
  }
  .header-controls .header-btn {
    padding: 3px 7px !important;
    font-size: 0.70rem !important;
  }
}