/* ============================================
   Navigator — Apple-Style Navigation Site
   style.css
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --bg-nav: rgba(245, 245, 247, 0.85);

  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #aeaeb2;

  --border: rgba(0, 0, 0, 0.08);
  --border-card: rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.14);

  --accent: #0071e3;
  --accent-hover: #0077ed;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --font-main: -apple-system, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", monospace;

  --transition: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.18s var(--transition);
  --transition-med: 0.3s var(--transition);
  --transition-slow: 0.5s var(--transition);

  --nav-height: 64px;
  --sidebar-width: 240px;
}

/* ---------- Dark Mode ---------- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-card: rgba(28, 28, 30, 0.72);
    --bg-glass: rgba(28, 28, 30, 0.6);
    --bg-nav: rgba(0, 0, 0, 0.85);

    --text-primary: #f5f5f7;
    --text-secondary: #98989d;
    --text-tertiary: #636366;

    --border: rgba(255, 255, 255, 0.1);
    --border-card: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
  }
}

[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1c1c1e;
  --bg-card: rgba(28, 28, 30, 0.72);
  --bg-glass: rgba(28, 28, 30, 0.6);
  --bg-nav: rgba(0, 0, 0, 0.85);
  --text-primary: #f5f5f7;
  --text-secondary: #98989d;
  --text-tertiary: #636366;
  --border: rgba(255, 255, 255, 0.1);
  --border-card: rgba(255, 255, 255, 0.08);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.6);
}

[data-theme="light"] {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.6);
  --bg-nav: rgba(245, 245, 247, 0.85);
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #aeaeb2;
  --border: rgba(0, 0, 0, 0.08);
  --border-card: rgba(0, 0, 0, 0.06);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --shadow-hover: 0 12px 48px rgba(0, 0, 0, 0.14);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background var(--transition-med), color var(--transition-med);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
}

img { max-width: 100%; }

/* ---------- Top Navigation Bar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  transition: background var(--transition-med);
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  flex-shrink: 0;
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: white;
  font-weight: 800;
}

/* Search Bar in Navbar */
.navbar-search {
  flex: 1;
  max-width: 480px;
  position: relative;
}

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

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-tertiary);
  font-size: 14px;
  pointer-events: none;
  z-index: 1;
}

#searchInput {
  width: 100%;
  height: 36px;
  background: var(--bg-secondary);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 0 12px 0 36px;
  font-family: var(--font-main);
  font-size: 14px;
  color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-med);
}

#searchInput::placeholder { color: var(--text-tertiary); }

#searchInput:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.15);
  background: var(--bg-secondary);
}

.search-clear {
  position: absolute;
  right: 10px;
  background: var(--text-tertiary);
  border: none;
  border-radius: 50%;
  width: 16px;
  height: 16px;
  cursor: pointer;
  color: var(--bg-secondary);
  font-size: 10px;
  display: none;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.search-clear:hover { background: var(--text-secondary); transform: scale(1.1); }

.search-clear.visible { display: flex; }

/* Navbar Right Controls */
.navbar-controls {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: none;
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-secondary);
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.icon-btn:hover {
  background: var(--border);
  color: var(--text-primary);
  transform: scale(1.08);
}

.icon-btn:active { transform: scale(0.95); }

/* Hamburger for mobile */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  transition: background var(--transition-fast);
}

.hamburger:hover { background: var(--border); }

.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-med);
}

.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Layout ---------- */
.layout {
  display: flex;
  padding-top: var(--nav-height);
  min-height: 100vh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  bottom: 0;
  overflow-y: auto;
  padding: 20px 12px;
  border-right: 1px solid var(--border);
  background: var(--bg-nav);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  transition: transform var(--transition-med), background var(--transition-med);
  z-index: 900;
  scrollbar-width: none;
}

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

.sidebar-section-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  padding: 8px 12px 4px;
  margin-top: 8px;
}

.sidebar-nav {
  list-style: none;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  user-select: none;
}

.sidebar-item:hover {
  background: var(--border);
  color: var(--text-primary);
}

.sidebar-item.active {
  background: rgba(0, 113, 227, 0.1);
  color: var(--accent);
}

.sidebar-item-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-item-count {
  margin-left: auto;
  background: var(--border);
  color: var(--text-tertiary);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 20px;
}

.sidebar-item.active .sidebar-item-count {
  background: rgba(0, 113, 227, 0.15);
  color: var(--accent);
}

/* ---------- Main Content ---------- */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  padding: 32px 32px 64px;
  max-width: calc(1280px + var(--sidebar-width));
  transition: margin var(--transition-med);
}

/* ---------- Hero / Welcome Banner ---------- */
.hero {
  text-align: center;
  padding: 48px 24px 40px;
  margin-bottom: 8px;
}

.hero-title {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.hero-title span {
  background: linear-gradient(135deg, var(--accent) 0%, #bf5af2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  font-weight: 400;
  letter-spacing: -0.2px;
}

/* ---------- Category Sections ---------- */
.category-section {
  margin-bottom: 48px;
  animation: fadeSlideIn 0.4s var(--transition) both;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.category-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.category-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.category-count {
  margin-left: auto;
  font-size: 13px;
  color: var(--text-tertiary);
  font-weight: 500;
}

/* ---------- Link Cards Grid ---------- */
.links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}

.link-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 18px 16px;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-fast),
    border-color var(--transition-fast),
    background var(--transition-med);
  position: relative;
  overflow: hidden;
  animation: cardIn 0.35s var(--transition) both;
}

.link-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  opacity: 0;
  transition: opacity var(--transition-fast);
  pointer-events: none;
}

.link-card:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: var(--shadow-hover);
  border-color: var(--border);
}

.link-card:hover::before { opacity: 1; }

.link-card:active {
  transform: translateY(-1px) scale(0.99);
  box-shadow: var(--shadow-md);
}

.card-emoji {
  font-size: 24px;
  margin-bottom: 10px;
  display: block;
  line-height: 1;
}

.card-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.2px;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.card-desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.4;
  flex: 1;
}

.card-arrow {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: 500;
  transition: color var(--transition-fast), gap var(--transition-fast);
}

.link-card:hover .card-arrow {
  color: var(--accent);
  gap: 6px;
}

/* ---------- Search Results ---------- */
#searchResults {
  display: none;
}

#searchResults.visible { display: block; }

.search-result-count {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0 20px;
  font-weight: 500;
}

.search-empty {
  text-align: center;
  padding: 64px 24px;
  color: var(--text-secondary);
}

.search-empty-icon {
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.5;
}

.search-empty h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 24px;
  font-size: 12px;
  color: var(--text-tertiary);
  border-top: 1px solid var(--border);
  margin-top: 16px;
}

/* ---------- Mobile Overlay ---------- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 850;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--transition-med);
}

.sidebar-overlay.visible { opacity: 1; }

/* ---------- Scroll to Top ---------- */
#scrollTop {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-secondary);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med), transform var(--transition-fast), background var(--transition-med);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 500;
}

#scrollTop.visible { opacity: 1; pointer-events: auto; }
#scrollTop:hover { transform: translateY(-2px); background: var(--accent); color: white; border-color: var(--accent); }
#scrollTop:active { transform: translateY(0); }

/* ---------- Tag Highlight ---------- */
mark {
  background: rgba(0, 113, 227, 0.15);
  color: var(--accent);
  border-radius: 3px;
  padding: 0 1px;
}

/* ---------- Animations ---------- */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes cardIn {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

/* ---------- Stagger delays ---------- */
.category-section:nth-child(1) { animation-delay: 0.05s; }
.category-section:nth-child(2) { animation-delay: 0.10s; }
.category-section:nth-child(3) { animation-delay: 0.15s; }
.category-section:nth-child(4) { animation-delay: 0.20s; }
.category-section:nth-child(5) { animation-delay: 0.25s; }
.category-section:nth-child(6) { animation-delay: 0.30s; }

/* ---------- Loading Skeleton ---------- */
.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: 48px;
}

.skeleton-card {
  height: 120px;
  border-radius: var(--radius-md);
  background: linear-gradient(
    90deg,
    var(--border) 0%,
    var(--bg-secondary) 50%,
    var(--border) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  :root { --sidebar-width: 200px; }
  .main-content { padding: 24px 24px 56px; }
  .links-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
}

/* Mobile */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .sidebar {
    transform: translateX(-100%);
    width: 260px;
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay { display: block; }

  .main-content {
    margin-left: 0;
    padding: 20px 16px 56px;
  }

  .navbar-search { max-width: none; }
  .navbar-logo span.logo-text { display: none; }

  .hero { padding: 32px 16px 28px; }

  .links-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 10px;
  }

  #scrollTop { bottom: 20px; right: 16px; }
}

/* Small Mobile */
@media (max-width: 480px) {
  .links-grid {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .hero-title { letter-spacing: -1px; }
  .navbar { padding: 0 16px; gap: 10px; }
}

/* Very small */
@media (max-width: 360px) {
  .links-grid { grid-template-columns: 1fr; }
}

/* Larger screens */
@media (min-width: 1400px) {
  .links-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
}

/* ============================================
   MODAL / POPUP STYLES
   ============================================ */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-med);
}

.modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.modal-container {
  position: relative;
  z-index: 1001;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 420px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalPop 0.3s var(--transition) both;
  transform: scale(0.9);
}

.modal.active .modal-container {
  animation: modalPop 0.3s var(--transition) both;
  transform: scale(1);
}

@keyframes modalPop {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 1002;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.modal-close:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.modal-close:active {
  transform: scale(0.95);
}

.modal-content {
  padding: 32px 28px;
}

.modal-header {
  text-align: center;
  margin-bottom: 24px;
}

.modal-header h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  margin: 0;
}

.modal-body {
  margin-bottom: 32px;
}

.qr-code-container {
  text-align: center;
  margin-bottom: 24px;
}

.qr-placeholder {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f9f9f9;
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 12px;
}

[data-theme="dark"] .qr-placeholder {
  background: rgba(255, 255, 255, 0.02);
}

.qr-placeholder svg {
  max-width: 100%;
  height: auto;
}

.qr-hint {
  font-size: 12px;
  color: var(--text-tertiary);
  margin: 0;
  font-weight: 500;
}

.modal-text {
  margin-bottom: 24px;
}

.modal-text p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 12px;
  font-weight: 500;
}

.benefits-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.benefits-list li {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 0 6px 24px;
  position: relative;
  line-height: 1.5;
}

.benefits-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.modal-footer {
  display: flex;
  gap: 10px;
  flex-direction: column;
}

.btn-primary,
.btn-secondary {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 16px rgba(0, 113, 227, 0.4);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 113, 227, 0.2);
}

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

.btn-secondary:hover {
  background: var(--bg-glass);
  border-color: var(--border);
}

.btn-secondary:active {
  background: var(--bg-card);
}

/* Modal Responsive */
@media (max-width: 480px) {
  .modal-container {
    width: 95%;
    max-height: 85vh;
  }

  .modal-content {
    padding: 24px 20px;
  }

  .modal-header h2 {
    font-size: 20px;
  }

  .qr-placeholder {
    padding: 8px;
  }

  .btn-primary,
  .btn-secondary {
    padding: 14px 12px;
    font-size: 13px;
  }
}