/* Kylin Website - Sci-Fi Theme (dark/light via theme.css) */
@import url('https://fonts.googleapis.com/css2?family=Fira+Sans:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&family=Source+Code+Pro:wght@400;600;700&display=swap');

:root {
  --sci-body-font: Roboto, sans-serif;
  --sci-heading-font: Roboto, sans-serif;
  --sci-code-font: 'Source Code Pro', 'Roboto Mono', monospace, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  --sci-zh-font: Roboto, 'Fira Sans', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
}

/* ===== Global ===== */
body {
  font-family: var(--sci-body-font);
  display: flex !important;
  flex-direction: column !important;
  min-height: 100vh !important;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  background-color: var(--sci-bg);
  color: var(--sci-text);
  background-image:
    repeating-linear-gradient(0deg, transparent, transparent 59px, var(--sci-grid-line) 59px, var(--sci-grid-line) 60px),
    repeating-linear-gradient(90deg, transparent, transparent 59px, var(--sci-grid-line) 59px, var(--sci-grid-line) 60px);
  background-size: 60px 60px;
}

body.mobile-nav-open {
  overflow: hidden;
}

.text-muted {
  color: var(--sci-text-muted) !important;
}

a {
  color: var(--sci-accent);
}

a:hover {
  color: var(--sci-accent);
  text-shadow: 0 0 6px rgba(var(--sci-accent-rgb), 0.4);
}

a,
button {
  -webkit-tap-highlight-color: rgba(var(--sci-accent-rgb), 0.14);
}

h1, h2, h3, h4, h5, h6,
.navbar-brand {
  font-family: var(--sci-heading-font);
}

html[lang="zh-CN"] body,
html:lang(zh-CN) body,
html[lang="zh-CN"] h1,
html[lang="zh-CN"] h2,
html[lang="zh-CN"] h3,
html[lang="zh-CN"] h4,
html[lang="zh-CN"] h5,
html[lang="zh-CN"] h6,
html[lang="zh-CN"] .navbar .nav-link,
html[lang="zh-CN"] .navbar-brand,
html[lang="zh-CN"] .btn,
html[lang="zh-CN"] .content-card,
html[lang="zh-CN"] .content-card-highlight,
html[lang="zh-CN"] .feature-card,
html[lang="zh-CN"] .feature-card p,
html[lang="zh-CN"] .section-subtitle,
html[lang="zh-CN"] .tech-list li,
html[lang="zh-CN"] .year-block,
html[lang="zh-CN"] footer,
html:lang(zh-CN) h1,
html:lang(zh-CN) h2,
html:lang(zh-CN) h3,
html:lang(zh-CN) h4,
html:lang(zh-CN) h5,
html:lang(zh-CN) h6,
html:lang(zh-CN) .navbar .nav-link,
html:lang(zh-CN) .navbar-brand,
html:lang(zh-CN) .btn,
html:lang(zh-CN) .content-card,
html:lang(zh-CN) .content-card-highlight,
html:lang(zh-CN) .feature-card,
html:lang(zh-CN) .feature-card p,
html:lang(zh-CN) .section-subtitle,
html:lang(zh-CN) .tech-list li,
html:lang(zh-CN) .year-block,
html:lang(zh-CN) footer {
  font-family: var(--sci-zh-font);
}

/* ===== Hero section ===== */
#intro {
  position: relative;
}

#intro .mask {
  position: relative;
  background: var(--sci-hero-mask) !important;
}

#intro .mask::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(var(--sci-accent-rgb), 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  animation: grid-drift 20s linear infinite;
}

@keyframes grid-drift {
  from { background-position: 0 0; }
  to   { background-position: 24px 24px; }
}

#intro h1 {
  text-shadow: 0 0 20px rgba(var(--sci-accent-rgb), 0.5);
}

#intro h5 {
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-size: 0.95rem;
}

/* Desktop: override hero section height (shared rules previously in each page's inline <style>) */
@media (min-width: 992px) {
  #intro {
    margin-top: -34px;
    height: 50vh !important;
  }
}

/* ===== Buttons ===== */
.btn-outline-light {
  border-color: var(--sci-accent);
  color: var(--sci-accent);
  transition: all 0.3s ease;
}

.btn-outline-light:hover {
  background-color: var(--sci-accent);
  color: var(--sci-bg);
  box-shadow: 0 0 18px rgba(var(--sci-accent-rgb), 0.45);
}

.btn-primary,
.bg-primary,
.text-primary,
a.text-primary:hover {
  --mdb-btn-bg: var(--sci-accent);
  --mdb-btn-color: var(--sci-bg);
}

/* ===== Navbar ===== */
.navbar.navbar-dark {
  background: var(--sci-navbar-bg) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--sci-navbar-border);
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.navbar.navbar-scrolled {
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.16);
}

.navbar-brand strong {
  font-size: 1.5rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  text-shadow: 0 0 8px rgba(var(--sci-accent-rgb), 0.5);
}

.navbar .nav-link,
.theme-toggle-btn,
.lang-toggle-btn,
.navbar-toggler,
.btn {
  outline: none;
}

.navbar .nav-link:focus-visible,
.theme-toggle-btn:focus-visible,
.lang-toggle-btn:focus-visible,
.navbar-toggler:focus-visible,
.btn:focus-visible {
  box-shadow: 0 0 0 0.2rem rgba(var(--sci-accent-rgb), 0.18);
}

.navbar .nav-link {
  color: var(--sci-heading) !important;
  border-radius: 10px;
  transition: color 0.2s, text-shadow 0.2s;
}

.navbar .nav-link:hover,
.navbar .nav-item.active .nav-link {
  text-shadow: 0 0 8px rgba(var(--sci-accent-rgb), 0.6);
}

/* ===== Main content flex grow ===== */
main {
  flex: 1;
}

/* ===== Section layout ===== */
.section-block {
  padding: 60px 0;
  background-color: var(--sci-bg);
}

.section-alt {
  background-color: var(--sci-bg-light);
}

/* ===== Section titles ===== */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  padding-left: 16px;
  border-left: 4px solid var(--sci-accent);
  margin-bottom: 2rem;
  color: var(--sci-heading);
  text-shadow: 0 0 10px rgba(var(--sci-accent-rgb), 0.3);
}

.section-title-center {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 2.5rem;
  position: relative;
  display: inline-block;
  color: var(--sci-heading);
  text-shadow: 0 0 10px rgba(var(--sci-accent-rgb), 0.3);
}

.section-title-center::after {
  content: '';
  display: block;
  width: 50px;
  height: 3px;
  background: var(--sci-accent);
  margin: 10px auto 0;
  border-radius: 2px;
  box-shadow: 0 0 8px rgba(var(--sci-accent-rgb), 0.6);
  animation: glow-pulse 2.5s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 6px rgba(var(--sci-accent-rgb), 0.4); }
  50%      { box-shadow: 0 0 16px rgba(var(--sci-accent-rgb), 0.8); }
}

/* ===== Logo hover mask (used with MDB hover-overlay) ===== */
.hover-overlay-mask {
  background-color: rgba(251, 251, 251, 0.15);
}

/* ===== Cards ===== */
.card {
  border: 1px solid var(--sci-glass-border);
  border-radius: 12px;
  background: var(--sci-glass);
  backdrop-filter: blur(6px);
  box-shadow: 0 4px 16px rgba(var(--sci-accent-rgb), 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(var(--sci-accent-rgb), 0.35);
  box-shadow: 0 0 24px rgba(var(--sci-accent-rgb), 0.2), 0 8px 32px var(--sci-card-shadow);
}

.card-body {
  color: var(--sci-text);
}

.card-title {
  color: var(--sci-heading);
}

.card-text {
  color: var(--sci-text-muted);
}

/* ===== Year block (publications / news) ===== */
.year-block {
  border-left: 3px solid var(--sci-accent);
  padding: 20px 24px;
  margin-bottom: 28px;
  background: rgba(var(--sci-accent-rgb), 0.03);
  border-radius: 0 8px 8px 0;
  backdrop-filter: blur(4px);
}

.year-block h5 {
  font-weight: 700;
  color: var(--sci-accent);
  margin-bottom: 12px;
  text-shadow: 0 0 8px rgba(var(--sci-accent-rgb), 0.3);
}

.year-block ul {
  margin-bottom: 0;
}

.year-block li {
  line-height: 1.75;
  margin-bottom: 0.45rem;
}

.year-block li:last-child {
  margin-bottom: 0;
}

/* ===== Content card (download / about) ===== */
.content-card {
  background: var(--sci-glass);
  border: 1px solid var(--sci-glass-border);
  border-radius: 12px;
  padding: 36px;
  box-shadow: 0 4px 16px var(--sci-card-shadow);
  margin-bottom: 28px;
  backdrop-filter: blur(6px);
}

.content-card-highlight {
  background: var(--sci-highlight-bg);
  border: 1px solid var(--sci-highlight-border);
  border-radius: 12px;
  padding: 36px;
  box-shadow: 0 0 20px rgba(var(--sci-accent-rgb), 0.08), 0 4px 16px var(--sci-card-shadow);
  margin-bottom: 28px;
  backdrop-filter: blur(6px);
}

.content-card ul,
.content-card-highlight ul {
  padding-left: 1.15rem;
  margin-bottom: 0;
}

.content-card li,
.content-card-highlight li {
  line-height: 1.75;
  margin-bottom: 0.5rem;
}

.content-card li:last-child,
.content-card-highlight li:last-child {
  margin-bottom: 0;
}

/* ===== Footer ===== */
footer {
  background-color: var(--sci-footer-bg) !important;
  border-top: 0.5px solid var(--sci-accent);
  color: var(--sci-text-muted);
}

footer .text-center.p-3 {
  background-color: rgba(var(--sci-accent-rgb), 0.05) !important;
}

footer a {
  color: var(--sci-accent) !important;
}

/* ===== Overrides for MDB text utilities ===== */
.text-dark {
  color: var(--sci-text) !important;
}

strong {
  color: var(--sci-heading);
}

.bg-light {
  background-color: var(--sci-bg-light) !important;
}

/* ===== Scrollbar (Webkit) ===== */
::-webkit-scrollbar {
  width: 8px;
}

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

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

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

/* ===== Feature grid (6-card layout) ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 991px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 575px) {
  .feature-grid { grid-template-columns: 1fr; }
}

.feature-card {
  background: var(--sci-glass);
  border: 1px solid var(--sci-glass-border);
  border-radius: 10px;
  padding: 28px 24px;
  backdrop-filter: blur(6px);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--sci-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(var(--sci-accent-rgb), 0.3);
  box-shadow: 0 0 20px rgba(var(--sci-accent-rgb), 0.15), 0 8px 28px var(--sci-card-shadow);
}

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

.feature-card-icon {
  font-size: 1.6rem;
  margin-bottom: 14px;
  display: block;
  opacity: 0.9;
}

.feature-card h5 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--sci-heading);
  margin-bottom: 10px;
  letter-spacing: 0.5px;
}

.feature-card p {
  color: var(--sci-text-muted);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 12px;
}

/* ===== Feature tags ===== */
.feature-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 0.72rem;
  font-family: var(--sci-code-font);
  font-weight: 600;
  color: var(--sci-accent);
  background: rgba(var(--sci-accent-rgb), 0.08);
  border: 1px solid rgba(var(--sci-accent-rgb), 0.2);
  border-radius: 4px;
  margin: 2px 3px 2px 0;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

/* ===== Code panel ===== */
.code-panel {
  background: var(--sci-code-bg);
  border: 1px solid var(--sci-code-border);
  border-radius: 10px;
  padding: 0;
  margin-bottom: 24px;
  overflow: hidden;
  font-family: var(--sci-code-font);
  position: relative;
}

.code-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--sci-accent);
  border-radius: 10px 0 0 10px;
  z-index: 1;
}

.code-panel-label {
  display: block;
  padding: 8px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--sci-accent);
  background: rgba(var(--sci-accent-rgb), 0.06);
  border-bottom: 1px solid rgba(var(--sci-accent-rgb), 0.1);
  letter-spacing: 1px;
  text-transform: none;
  font-family: var(--sci-code-font);
}

.code-panel pre {
  margin: 0;
  padding: 16px 20px;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--sci-text);
  background: transparent;
  overflow-x: auto;
  white-space: pre;
}

.code-panel pre .code-keyword {
  color: var(--sci-accent);
}

.code-panel pre .code-value {
  color: #a8d8a8;
}

.code-panel pre .code-comment {
  color: #5a6a80;
  font-style: italic;
}

/* ===== Output format block ===== */
.output-block {
  background: var(--sci-code-bg);
  border: 1px solid rgba(var(--sci-accent-rgb), 0.12);
  border-radius: 8px;
  padding: 20px 24px;
  font-family: var(--sci-code-font);
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--sci-text-muted);
  overflow-x: auto;
}

.output-block .out-tag {
  color: var(--sci-accent);
  font-weight: 700;
}

.output-block .out-key {
  color: #c8d8e8;
}

.output-block .out-val {
  color: #a8d8a8;
}

/* ===== Section subtitle ===== */
.section-subtitle {
  color: var(--sci-text-muted);
  font-size: 0.95rem;
  margin-top: -1.5rem;
  margin-bottom: 2.5rem;
  letter-spacing: 0.5px;
}

/* ===== Tech list with tags ===== */
.tech-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tech-list li {
  padding: 8px 0;
  border-bottom: 1px solid rgba(var(--sci-accent-rgb), 0.06);
  color: var(--sci-text);
  font-size: 0.92rem;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.tech-list li:last-child {
  border-bottom: none;
}

.tech-list li::before {
  content: '\25B8';
  color: var(--sci-accent);
  font-size: 0.7rem;
  flex-shrink: 0;
}

/* ===== Quick Start section ===== */
.quickstart-desc {
  margin-bottom: 2rem;
}

.quickstart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 767px) {
  .quickstart-grid { grid-template-columns: 1fr; }
}

html {
  scroll-padding-top: 44px;
}

body {
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 2000;
}

.navbar-toggler {
  display: none;
}

.navbar .container-fluid {
  padding: 0.15rem 1rem;
  gap: 0.75rem;
}

.navbar .nav-link:not(.navbar-brand) {
  font-size: 1.35rem;
  font-weight: 500;
}

.navbar-nav {
  gap: 1.2rem;
}

@media (max-width: 991px) {
  nav.navbar.navbar-expand-lg {
    --mdb-navbar-padding-y: 0;
    --mdb-navbar-padding-top: 0;
    padding: 0 !important;
  }

  nav.navbar .container-fluid {
    display: flex !important;
    flex-wrap: wrap !important;
    align-items: center !important;
    padding: 0.5rem 0.75rem !important;
    gap: 0 !important;
  }

  nav.navbar .navbar-brand.nav-link {
    --mdb-navbar-brand-padding-y: 0;
    display: flex !important;
    align-items: center !important;
    height: 40px !important;
    padding: 0 !important;
    margin: 0 !important;
    margin-right: auto !important;
    line-height: 1 !important;
    position: relative;
    z-index: 1;
  }

  nav.navbar .navbar-brand strong {
    font-size: 1.1rem;
    letter-spacing: 1.5px;
    line-height: 1;
    white-space: nowrap;
  }
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.nav-actions .theme-toggle-btn,
.nav-actions .lang-toggle-btn {
  margin-left: 0;
}

.hero-content {
  max-width: 1100px;
  padding: 0 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}

.hero-actions .btn {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0 !important;
  min-width: 220px;
}

html[lang="zh-CN"] .hero-actions .btn[data-i18n="hero.btn.download"],
html[lang="zh-CN"] .hero-actions .btn[data-i18n="hero.btn.manual"] {
  font-size: 1.15em;
  line-height: 1;
}

@media (max-width: 991px) {
  #intro {
    height: auto !important;
    min-height: 100svh;
  }

  #intro .mask,
  #intro .container {
    min-height: inherit;
  }

  #intro .container {
    padding-top: 96px;
    padding-bottom: 56px;
  }

  .hero-content {
    padding: 0;
  }

  #intro h1 {
    font-size: clamp(2rem, 7vw, 3rem);
    line-height: 1.15;
  }

  #intro h5 {
    font-size: 0.88rem;
    line-height: 1.7;
    letter-spacing: 1.2px;
  }

  nav.navbar .navbar-toggler {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 40px !important;
    height: 40px !important;
    padding: 0 !important;
    margin: 0 !important;
    border-radius: 8px;
    box-shadow: none !important;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
  }

  nav.navbar .navbar-toggler:focus {
    box-shadow: none !important;
  }

  nav.navbar .navbar-toggler:focus-visible {
    box-shadow: 0 0 0 0.2rem rgba(var(--sci-accent-rgb), 0.18) !important;
  }

  nav.navbar .navbar-toggler .navbar-toggler-icon {
    display: block !important;
    width: 1.4rem !important;
    height: 1.4rem !important;
  }

  body.mobile-nav-open .navbar {
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    border-bottom: none !important;
    box-shadow: none !important;
    background: var(--sci-bg) !important;
    overflow: hidden;
    align-items: stretch !important;
  }

  body.mobile-nav-open .navbar .container-fluid {
    display: grid !important;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto 1fr;
    gap: 0 !important;
    padding: 0.5rem 0.75rem !important;
  }

  body.mobile-nav-open .navbar .navbar-brand.nav-link {
    grid-column: 1;
    grid-row: 1;
    align-self: center;
  }

  body.mobile-nav-open .navbar .navbar-toggler {
    grid-column: 2;
    grid-row: 1;
    align-self: center;
  }

  .navbar-collapse {
    display: none !important;
  }

  body.mobile-nav-open .navbar-collapse.show {
    display: flex !important;
    flex-direction: column;
    grid-column: 1 / -1;
    grid-row: 2;
    align-self: stretch;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: none;
    padding: 0 !important;
    margin: 0 !important;
  }

  .navbar-collapse.show::-webkit-scrollbar {
    display: none;
  }

  .navbar-nav {
    gap: 0;
    padding: 0;
    margin: 0 !important;
    width: 100%;
    flex-direction: column !important;
  }

  .navbar .nav-item {
    border-bottom: 1px solid rgba(var(--sci-accent-rgb), 0.1);
  }

  .navbar .nav-link:not(.navbar-brand) {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    min-height: 52px;
    padding: 0.9rem 1.25rem !important;
    font-size: 1.05rem;
    font-weight: 400;
    border-radius: 0;
    letter-spacing: 0.2px;
    text-align: left;
  }

  .navbar .nav-item.active .nav-link {
    font-weight: 600;
    color: var(--sci-accent) !important;
    background: transparent;
    border: none;
  }

  .nav-actions {
    width: 100%;
    justify-content: flex-start;
    margin-left: 0;
    padding: 1rem 1.25rem 0;
    border-top: 1px solid rgba(var(--sci-accent-rgb), 0.1);
  }

  .nav-actions .theme-toggle-btn,
  .nav-actions .lang-toggle-btn {
    width: 38px;
    height: 38px;
  }

  .section-block {
    padding: 44px 0;
  }

  .content-card,
  .content-card-highlight,
  .year-block {
    padding: 24px 20px;
  }

  .feature-card {
    padding: 24px 20px;
  }

  .tech-list li {
    align-items: flex-start;
  }

  .feature-tag {
    white-space: normal;
    overflow-wrap: anywhere;
  }
}

@media (max-width: 575px) {
  .navbar .container-fluid,
  .container {
    padding-left: 18px;
    padding-right: 18px;
  }

  #intro .container {
    padding-top: 88px;
    padding-bottom: 44px;
  }

  #intro h1 {
    font-size: clamp(1.82rem, 8.2vw, 2.45rem);
  }

  #intro h5 {
    letter-spacing: 0.8px;
  }

  .navbar-brand strong {
    letter-spacing: 1.2px;
    font-size: 1.0rem;
    white-space: nowrap;
  }

  .navbar-collapse {
    border-radius: 0;
  }

  .hero-actions .btn {
    width: 100%;
    min-width: 0;
  }

  .section-title,
  .section-title-center {
    font-size: 1.25rem;
  }

  .section-subtitle {
    margin-top: -1rem;
    margin-bottom: 1.75rem;
  }

  .code-panel pre,
  .output-block {
    font-size: 0.76rem;
  }
}

@supports (padding: max(0px)) {
  @media (max-width: 575px) {
    .navbar .container-fluid,
    .container {
      padding-left: max(18px, env(safe-area-inset-left));
      padding-right: max(18px, env(safe-area-inset-right));
    }
  }
}