/* ============================================================
   Swoole.com - Modern Design Enhancement
   Overlays modern styling on top of existing Bootstrap skin.
   Does not modify HTML structure or business logic.
   ============================================================ */

/* ---- CSS Variables (modern color system) ---- */
:root {
  --sw-primary: #3b82f6;
  --sw-primary-dark: #2563eb;
  --sw-primary-light: #dbeafe;
  --sw-primary-50: #eff6ff;
  --sw-accent: #f59e0b;
  --sw-accent-light: #fef3c7;
  --sw-success: #10b981;
  --sw-success-light: #d1fae5;
  --sw-danger: #ef4444;
  --sw-danger-light: #fee2e2;
  --sw-dark: #0f172a;
  --sw-slate-900: #1e293b;
  --sw-slate-800: #334155;
  --sw-slate-700: #475569;
  --sw-slate-600: #64748b;
  --sw-slate-500: #94a3b8;
  --sw-slate-400: #cbd5e1;
  --sw-slate-300: #e2e8f0;
  --sw-slate-200: #f1f5f9;
  --sw-slate-100: #f8fafc;
  --sw-white: #ffffff;
  --sw-radius-sm: 6px;
  --sw-radius: 10px;
  --sw-radius-lg: 14px;
  --sw-shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --sw-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --sw-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --sw-shadow-md: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --sw-shadow-lg: 0 20px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --sw-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Global ---- */
html {
  scroll-behavior: smooth;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

a {
  transition: color var(--sw-transition);
}

/* ---- Navbar refinements ---- */
#page-topbar {
  background: linear-gradient(135deg, #1a2332 0%, #1e2d3d 50%, #1a2332 100%) !important;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

#page-topbar .navbar-dark .nav-link {
  font-weight: 400;
  letter-spacing: 0.01em;
  transition: color var(--sw-transition);
  position: relative;
}

#page-topbar .navbar-dark .nav-link::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--sw-primary);
  border-radius: 2px;
  transition: all var(--sw-transition);
  transform: translateX(-50%);
}

#page-topbar .navbar-dark .nav-link:hover::after,
#page-topbar .navbar-dark .nav-item.active .nav-link::after {
  width: 60%;
}

#page-topbar .navbar-dark .nav-link:hover {
  color: rgba(255, 255, 255, 0.92) !important;
}

#page-topbar .dropdown-menu {
  border: 1px solid var(--sw-slate-200);
  border-radius: var(--sw-radius);
  box-shadow: var(--sw-shadow-lg);
  padding: 6px 0;
  overflow: hidden;
  animation: dropdownFadeIn 180ms ease-out;
}

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

#page-topbar .dropdown-item {
  padding: 8px 18px;
  font-size: 0.9rem;
  transition: all var(--sw-transition);
  color: var(--sw-slate-700);
}

#page-topbar .dropdown-item:hover {
  background: var(--sw-slate-100);
  color: var(--sw-primary);
  padding-left: 22px;
}

#page-topbar .btn {
  border-radius: var(--sw-radius-sm);
  padding: 6px 14px;
  font-weight: 500;
  transition: all var(--sw-transition);
}

#page-topbar .btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--sw-shadow-sm);
}

.navbar-toggler {
  border: none !important;
  padding: 4px 8px;
}

.navbar-toggler:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
}

.navbar-brand img {
  transition: transform var(--sw-transition);
}
.navbar-brand:hover img {
  transform: scale(1.05);
}

/* AOT Compiler nav link special styling */
#page-topbar .nav-link[href*="aot"] {
  position: relative;
}

/* ---- Hero / Jumbotron ---- */
.jumbotron {
  background: linear-gradient(180deg, var(--sw-slate-100) 0%, var(--sw-white) 100%);
  border-radius: 0 0 var(--sw-radius-lg) var(--sw-radius-lg);
  padding-top: 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--sw-slate-200);
}

.jumbotron .display-5 {
  font-weight: 700;
  background: linear-gradient(135deg, var(--sw-slate-900) 0%, #3b5998 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.jumbotron .lead {
  color: var(--sw-slate-600);
  font-size: 1.05rem;
}

/* ---- Buttons ---- */
.btn {
  border-radius: var(--sw-radius-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: all var(--sw-transition);
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: linear-gradient(135deg, var(--sw-primary) 0%, var(--sw-primary-dark) 100%);
  border-color: transparent;
  box-shadow: var(--sw-shadow-xs);
}

.btn-primary:hover {
  box-shadow: var(--sw-shadow-md);
  background: linear-gradient(135deg, #4b8ef7 0%, #3173e6 100%);
}

.btn-outline-primary {
  border-color: var(--sw-slate-300);
  color: var(--sw-slate-700);
}

.btn-outline-primary:hover,
.btn-outline-primary.btn-active {
  background: linear-gradient(135deg, var(--sw-primary) 0%, var(--sw-primary-dark) 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--sw-shadow-sm);
}

.btn-success {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  border-color: transparent;
  box-shadow: var(--sw-shadow-xs);
}

.btn-success:hover {
  box-shadow: var(--sw-shadow-md);
}

.btn-outline-secondary {
  border-color: var(--sw-slate-300);
  color: var(--sw-slate-600);
  background: var(--sw-white);
}

.btn-outline-secondary:hover {
  background: var(--sw-slate-100);
  border-color: var(--sw-slate-400);
  color: var(--sw-slate-800);
}

/* ---- Cards ---- */
.card {
  border: 1px solid var(--sw-slate-200);
  border-radius: var(--sw-radius);
  box-shadow: var(--sw-shadow-xs);
  transition: box-shadow var(--sw-transition), transform var(--sw-transition);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--sw-shadow-sm);
}

.card-header-title {
  font-weight: 600;
  color: var(--sw-slate-800);
  background: var(--sw-slate-100);
  font-size: 0.95rem;
}

.card-body {
  background: var(--sw-white);
}

/* Sidebar community cards */
.card.mobile-none {
  margin-top: 16px;
}

/* ---- Tables ---- */
.el-table {
  border-radius: var(--sw-radius);
  overflow: hidden;
  box-shadow: var(--sw-shadow-sm);
  border: 1px solid var(--sw-slate-200) !important;
}

.el-table thead tr {
  background: linear-gradient(180deg, var(--sw-slate-100) 0%, var(--sw-slate-200) 100%) !important;
}

.el-table thead th {
  font-weight: 600;
  color: var(--sw-slate-700);
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  border-bottom: 2px solid var(--sw-slate-300);
}

.el-table tbody tr {
  transition: background var(--sw-transition);
}

.el-table tbody tr:hover {
  background: var(--sw-primary-50);
}

.el-table tbody td {
  color: var(--sw-slate-700);
  vertical-align: middle;
}

.el-table tbody td a {
  color: var(--sw-primary);
  font-weight: 500;
}

.el-table tbody td a:hover {
  color: var(--sw-primary-dark);
  text-decoration: underline;
}

/* ---- Nav tabs (code examples) ---- */
.nav-tabs {
  border-radius: var(--sw-radius-sm) var(--sw-radius-sm) 0 0;
  overflow: hidden;
}

.nav-tabs .nav-link {
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  padding: 10px 20px;
  color: var(--sw-slate-400) !important;
  transition: all var(--sw-transition);
  border: none !important;
}

.nav-tabs .nav-link:hover {
  color: var(--sw-white) !important;
  background: rgba(255, 255, 255, 0.06);
}

.nav-tabs .nav-link.active {
  color: var(--sw-white) !important;
  background: #1a2332 !important;
  border-radius: var(--sw-radius-sm) var(--sw-radius-sm) 0 0 !important;
}

/* ---- Code blocks ---- */
pre {
  border-radius: 0 0 var(--sw-radius-sm) var(--sw-radius-sm);
  margin-bottom: 0;
  border: 1px solid #2d3748;
  border-top: none;
}

pre code {
  font-size: 0.88rem;
  line-height: 1.7;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', 'Monaco', monospace;
}

/* ---- Community page ---- */
.community-nav .nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--sw-transition);
  border-radius: var(--sw-radius-sm);
  padding: 6px 14px;
  margin-right: 2px;
}

.community-nav .nav-link:hover {
  background: var(--sw-slate-100);
}

#comprehensive .nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  transition: all var(--sw-transition);
  padding: 8px 18px;
  border-radius: var(--sw-radius-sm);
}

#comprehensive .nav-link:hover {
  background: var(--sw-slate-100);
  color: var(--sw-primary) !important;
}

#comprehensive .nav-link.active {
  color: var(--sw-primary) !important;
  font-weight: 600;
}

#comprehensive .nav-link.active::after {
  content: '';
  display: block;
  width: 18px;
  height: 3px;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--sw-primary), var(--sw-accent));
  margin: 6px auto 0;
}

/* ---- Community post items ---- */
.detail-link:link { color: var(--sw-slate-800); }
.detail-link:hover { color: var(--sw-primary) !important; text-decoration: none; }
.detail-link:visited { color: var(--sw-slate-500); }

.btn-ans {
  font-weight: 500;
  font-size: 0.75rem;
  border-radius: 4px;
  padding: 2px 8px;
  transition: all var(--sw-transition);
}

.btn-ans:hover {
  transform: translateY(-1px);
}

.btn-info {
  background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 100%) !important;
  border-color: transparent !important;
}

.btn-zero {
  color: var(--sw-danger) !important;
  background: var(--sw-danger-light) !important;
  border: 1px solid rgba(239, 68, 68, 0.2) !important;
}

.btn-light {
  background: var(--sw-slate-100) !important;
  border-color: var(--sw-slate-200) !important;
  color: var(--sw-slate-600) !important;
  transition: all var(--sw-transition);
  font-weight: 500;
}

.btn-light:hover {
  background: var(--sw-slate-200) !important;
  color: var(--sw-slate-800) !important;
}

/* ---- Avatar & user elements ---- */
.my-header {
  font-weight: 600;
  background: linear-gradient(135deg, #f59e0b 0%, #f97316 100%) !important;
  box-shadow: 0 2px 6px rgba(249, 115, 22, 0.25);
  transition: transform var(--sw-transition);
}

.my-header:hover {
  transform: scale(1.08);
}

.img-header {
  border: 2px solid var(--sw-white);
  box-shadow: var(--sw-shadow-xs);
  transition: transform var(--sw-transition);
}

.img-header:hover {
  transform: scale(1.08);
}

/* ---- Pagination ---- */
.pagination .page-link {
  border-radius: var(--sw-radius-sm);
  margin: 0 3px;
  border: 1px solid var(--sw-slate-200);
  color: var(--sw-slate-600);
  font-weight: 500;
  transition: all var(--sw-transition);
}

.pagination .page-link:hover {
  background: var(--sw-primary-50);
  color: var(--sw-primary);
  border-color: var(--sw-primary);
  transform: translateY(-1px);
  box-shadow: var(--sw-shadow-xs);
}

.pagination .page-item.active .page-link {
  background: linear-gradient(135deg, var(--sw-primary) 0%, var(--sw-primary-dark) 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--sw-shadow-sm);
}

.pagination .page-item.disabled .page-link {
  color: var(--sw-slate-400);
  background: var(--sw-white);
}

/* ---- Footer ---- */
footer.bg-dark {
  background: linear-gradient(180deg, #1a2332 0%, #0f1923 100%) !important;
  border-top: 4px solid var(--sw-primary) !important;
}

footer h5 {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

footer h5::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: var(--sw-primary);
  margin-top: 6px;
  border-radius: 1px;
}

footer .text-muted {
  color: #94a3b8 !important;
  transition: color var(--sw-transition);
  font-size: 0.88rem;
  line-height: 2;
}

footer a.text-muted:hover {
  color: var(--sw-white) !important;
  text-decoration: none;
}

footer .ecosystem-link {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: all var(--sw-transition);
  font-size: 0.82rem;
}

footer .ecosystem-link:hover {
  background: rgba(59, 130, 246, 0.15);
  border-color: rgba(59, 130, 246, 0.3);
  color: var(--sw-primary) !important;
  text-decoration: none;
}

/* ---- Community category nav (below header) ---- */
.bg-white.border-top.shadow-sm {
  box-shadow: var(--sw-shadow-sm) !important;
  border-bottom: 1px solid var(--sw-slate-200);
}

/* ---- Form controls ---- */
.form-control {
  border-radius: var(--sw-radius-sm);
  border-color: var(--sw-slate-300);
  transition: all var(--sw-transition);
  box-shadow: var(--sw-shadow-xs);
}

.form-control:focus {
  border-color: var(--sw-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-control::placeholder {
  color: var(--sw-slate-400);
}

/* ---- Search input in community ---- */
input[name="search"] {
  border-radius: 20px !important;
  padding-left: 16px !important;
  border-color: var(--sw-slate-300) !important;
  background: var(--sw-slate-100) !important;
  transition: all var(--sw-transition);
}

input[name="search"]:focus {
  background: var(--sw-white) !important;
  border-color: var(--sw-primary) !important;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12) !important;
}

/* ---- Sponsor page ---- */
.markdown-body {
  line-height: 1.85;
  color: var(--sw-slate-700);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  font-weight: 700;
  color: var(--sw-slate-900);
  letter-spacing: -0.015em;
}

.markdown-body a {
  color: var(--sw-primary);
  text-decoration: none;
}

.markdown-body a:hover {
  text-decoration: underline;
}

/* ---- Q&A detail page ---- */
.comments-box img {
  border-radius: var(--sw-radius-sm);
  max-width: 50%;
  border: 1px solid var(--sw-slate-200) !important;
  transition: box-shadow var(--sw-transition);
}

.comments-box img:hover {
  box-shadow: var(--sw-shadow-md);
}

/* ---- Custom select ---- */
.custom-select-sm {
  border-radius: var(--sw-radius-sm);
  border-color: var(--sw-slate-300);
  padding: 4px 28px 4px 10px;
  font-size: 0.82rem;
  font-weight: 500;
  background-color: var(--sw-white);
  cursor: pointer;
}

/* ---- Download filter buttons ---- */
.container .btn-outline-primary img {
  vertical-align: middle;
  margin-top: -2px;
  margin-right: 4px;
}

/* ---- Share / article meta buttons ---- */
.mt-2 .btn-light.btn-sm {
  font-size: 0.76rem;
  padding: 3px 10px;
  border-radius: 4px;
}

/* ---- Profile / user pages ---- */
.my-reply-comment-input textarea {
  border-radius: var(--sw-radius-sm);
  border-color: var(--sw-slate-300);
  resize: vertical;
}

.my-reply-comment-input textarea:focus {
  border-color: var(--sw-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
  outline: none;
}

.my-reply-comment-input button {
  border-radius: var(--sw-radius-sm);
  font-weight: 500;
  transition: all var(--sw-transition);
}

.my-reply-comment-input button:hover {
  background: var(--sw-primary);
  color: #fff;
  border-color: var(--sw-primary);
}

/* ---- Project cards on homepage ---- */
.project .media {
  border-radius: var(--sw-radius);
  transition: all var(--sw-transition);
  border: 1px solid transparent;
}

.project .media:hover {
  border-color: var(--sw-slate-200);
  box-shadow: var(--sw-shadow);
}

.project .media:hover img {
  transform: scale(1.03);
}

.project img {
  transition: transform 300ms cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: var(--sw-radius-sm);
}

.project h5 a {
  color: var(--sw-slate-900);
  font-weight: 600;
  transition: color var(--sw-transition);
}

.project h5 a:hover {
  color: var(--sw-primary);
  text-decoration: none;
}

/* ---- Download page ---- */
.o-table.mirror-pc {
  border-radius: var(--sw-radius);
  overflow: hidden;
}

/* ---- Sponsor & WeChat images ---- */
.border.shadow.p-2 {
  border-radius: var(--sw-radius) !important;
  transition: transform 300ms ease;
}

.border.shadow.p-2:hover {
  transform: scale(1.02);
}

/* ---- Features / heading decoration ---- */
.aui-start::after {
  background: linear-gradient(90deg, var(--sw-primary), var(--sw-accent)) !important;
  width: 50px !important;
  height: 3px !important;
}

/* ---- Custom scrollbar ---- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--sw-slate-100);
}

::-webkit-scrollbar-thumb {
  background: var(--sw-slate-400);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--sw-slate-500);
}

/* ---- Selection ---- */
::selection {
  background: rgba(59, 130, 246, 0.18);
  color: var(--sw-slate-900);
}

/* ---- Focus visible (accessibility) ---- */
:focus-visible {
  outline: 2px solid var(--sw-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---- Fade-in on load ---- */
.main-content {
  animation: pageFadeIn 400ms ease-out;
}

@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Responsive refinements ---- */
@media (max-width: 768px) {
  .navbar-nav .nav-link {
    padding: 8px 16px !important;
  }

  #page-topbar .dropdown-menu {
    border: none;
    box-shadow: none;
    background: transparent;
    padding-left: 12px;
  }

  #page-topbar .dropdown-item {
    color: rgba(255, 255, 255, 0.8);
  }

  #page-topbar .dropdown-item:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
  }

  .jumbotron .display-5 {
    font-size: 1.5rem;
  }
}