/**
 * layout.css - 导航栏、侧边栏、页脚、联系方式
 * NEGIAO.github.io 模块化 CSS
 */

/* ========================
   Navbar - Glass Morphism
   ======================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.navbar--scrolled {
  background: rgba(10, 14, 19, 0.75);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  box-shadow: var(--shadow-lg);
}

.navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  height: 4.5rem;
  position: relative;
}

.navbar__brand {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.navbar__brand:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 8px rgba(0, 217, 255, 0.5));
}

.navbar__nav {
  display: flex;
  list-style: none;
  gap: var(--space-xl);
  margin: 0 auto;
  padding: 0;
  justify-content: center;
  align-items: center;
}

.navbar__link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
  text-decoration: none;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
}

.navbar__link:hover {
  color: var(--primary);
  background: rgba(0, 217, 255, 0.1);
  transform: translateY(-1px);
}

.navbar__link:hover::after {
  width: 80%;
}

.navbar__link.active {
  color: var(--primary);
  background: rgba(0, 217, 255, 0.15);
}

.navbar__link.active::after {
  width: 80%;
}

/* Ensure navbar is above all floating elements */
.navbar {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  z-index: 110000 !important;
}

/* ========================
   Mobile Navigation
   ======================== */
.mobile-menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text);
  cursor: pointer;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.mobile-menu-toggle:hover,
.mobile-menu-toggle.active {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(0, 217, 255, 0.07);
}

.mobile-menu-toggle i {
  font-size: 1.05rem;
  transition: transform 0.18s ease;
}

/* Full-screen immersive overlay */
.mobile-menu {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  position: fixed;
  inset: 0;
  background: rgba(8, 41, 60, 0.15);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  z-index: 1029;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5rem 1.5rem 2rem;
  transition:
    opacity 0.28s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

/* Mobile Menu Nav List */
.mobile-menu__nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  width: 100%;
  max-width: 320px;
}

.mobile-menu__link {
  color: var(--text);
  font-size: 1.25rem;
  font-weight: 700;
  white-space: nowrap;
}

/* ========================
   Navbar Nav Buttons（返回/查看/首页）
   毛玻璃胶囊，和 widget 按钮统一设计语言
   ======================== */
.navbar-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.42rem;
  min-height: 2.05rem;
  padding: 0 0.78rem 0 0.42rem;
  border: 1px solid color-mix(in srgb, var(--primary) 22%, var(--glass-border));
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  background: color-mix(in srgb, var(--surface-elevated) 72%, transparent);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 700;
  white-space: nowrap;
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.12);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar-nav-btn:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 50%, var(--glass-border));
  background: color-mix(in srgb, var(--primary) 9%, var(--surface-elevated));
  transform: translateY(-1px);
  box-shadow: 0 7px 18px rgba(0, 217, 255, 0.1);
  text-decoration: none;
}

.navbar-nav-btn:active {
  transform: scale(0.97);
}

.navbar-nav-btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.38rem;
  height: 1.38rem;
  border-radius: 50%;
  color: var(--primary);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.navbar-nav-btn:hover .navbar-nav-btn__icon {
  transform: translateX(-2px);
}

.navbar-nav-btn__icon i {
  font-size: 0.64rem;
}

.navbar-nav-btn__text {
  line-height: 1;
}

/* ========================
   Navbar Widgets (Theme / Lang / Share)
   统一设计：毛玻璃胶囊，flex 流式布局
   ======================== */

/* 基础按钮样式 — 所有 navbar widget 共用 */
.navbar-widget-btn {
  position: relative;
  background: color-mix(in srgb, var(--surface-elevated) 72%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 18%, var(--glass-border));
  border-radius: var(--radius-full);
  width: 2.05rem;
  height: 2.05rem;
  min-width: 2.05rem;
  min-height: 2.05rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  z-index: 1;
  font-size: 0.8rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 5px 14px rgba(0, 0, 0, 0.1);
}

.navbar-widget-btn:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 48%, var(--glass-border));
  background: color-mix(in srgb, var(--primary) 9%, var(--surface-elevated));
  transform: translateY(-1px);
  box-shadow: 0 7px 18px rgba(0, 217, 255, 0.12);
}

.navbar-widget-btn:active {
  transform: scale(0.94);
}

.navbar-widget-btn i {
  font-size: 0.8rem;
  transition: transform 0.25s ease;
}

/* 主题切换 — 悬停时图标旋转 */
.theme-toggle:hover i {
  transform: rotate(150deg);
}

/* 分享按钮 — 悬停时图标抖动 */
.share-note-btn:hover i {
  transform: rotate(-12deg) scale(1.1);
}

/* 分享按钮 — 复制成功反馈 */
.share-note-btn.copied {
  border-color: var(--success);
  color: var(--success);
  background: rgba(81, 207, 102, 0.12);
}

/* 语言切换 — 文字标签而非图标 */
.negiao-lang-toggle,
.negiao-lang-toggle--nav {
  width: auto;
  min-width: 2.05rem;
  padding: 0 0.78rem;
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  font-family: var(--font-sans);
}

.negiao-lang-toggle:hover,
.negiao-lang-toggle--nav:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 48%, var(--glass-border));
  background: color-mix(in srgb, var(--primary) 9%, var(--surface-elevated));
}

/* 浮动语言按钮（无 navbar 时的降级） */
.negiao-lang-toggle--floating {
  position: fixed !important;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  top: auto;
  transform: none !important;
  z-index: 1065;
  width: 48px;
  height: 48px;
}

/* 侧边栏 footer 中的 widget — 更小更紧凑 */
.sidebar__footer .navbar-widget-btn {
  width: 2.35rem;
  height: 2.35rem;
  min-width: 2.35rem;
  min-height: 2.35rem;
  border-radius: 0.88rem;
  border-color: transparent;
  background: transparent;
  box-shadow: none;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  color: var(--text-muted);
}

.sidebar__footer .navbar-widget-btn:hover {
  color: var(--primary);
  border-color: color-mix(in srgb, var(--primary) 24%, transparent);
  background: color-mix(in srgb, var(--primary) 10%, transparent);
  transform: translateY(-1px);
  box-shadow: none;
}

/* ---- 响应式 ---- */
@media (max-width: 768px) {
  .navbar-nav-btn {
    min-height: 2rem;
    padding: 0 0.62rem 0 0.34rem;
    font-size: 0.76rem;
  }

  .navbar-nav-btn__icon {
    width: 1.28rem;
    height: 1.28rem;
  }

  .navbar-widget-btn {
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    min-height: 2rem;
    font-size: 0.72rem;
  }

  .negiao-lang-toggle,
  .negiao-lang-toggle--nav {
    min-width: 2rem;
    padding: 0 0.5rem;
    font-size: 0.62rem;
  }

  .negiao-lang-toggle--floating {
    width: 42px;
    height: 42px;
    right: max(0.75rem, env(safe-area-inset-right));
    bottom: max(0.75rem, env(safe-area-inset-bottom));
  }
}

/* ========================
   Sidebar Navigation (Desktop)
   ======================== */
@media (min-width: 769px) {
  .sidebar ~ .main-content-wrapper .navbar {
    display: none !important;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 100px;
    background: rgba(26, 31, 46, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.08);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
  }

  .main-content-wrapper {
    margin-left: 100px;
    width: calc(100% - 100px);
    min-height: 100vh;
    position: relative;
    padding-bottom: 2rem;
  }

  .main-content-wrapper .container {
    max-width: 1600px !important;
    padding: 0 3rem !important;
  }
}

/* Mobile: Default stacked layout */
@media (max-width: 768px) {
  .sidebar {
    display: none;
  }

  .main-content-wrapper {
    margin-left: 0;
    width: 100%;
    padding-top: 4.5rem;
  }

  .navbar__nav {
    display: none;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .mobile-menu {
    display: flex;
  }

  .navbar__container {
    justify-content: space-between;
    position: relative;
  }

  .navbar__brand {
    position: static;
    transform: none;
  }

  .mobile-menu-toggle {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    z-index: 1060;
    order: 3;
  }

  /* 移动端：widget 按钮紧跟在 brand 后面，hamburger 在最右 */
  .navbar__container .navbar-widget-btn {
    order: 2;
  }

  .navbar__container:has(.mobile-menu-toggle) .navbar-widget-btn {
    order: 2;
  }
}

@media (max-width: 576px) {
  .main-content-wrapper {
    padding-top: 3.5rem;
  }
}

/* Sidebar Elements */
.sidebar__logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-bottom: 2rem;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-weight: 900;
  font-size: 1.25rem;
  text-decoration: none;
  letter-spacing: 0;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: transform 0.2s;
}

.sidebar__logo:hover {
  transform: scale(1.2);
}

.sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  width: 100%;
  flex-grow: 1;
  justify-content: center;
}

.sidebar__link {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  text-decoration: none;
  background: transparent;
}

.sidebar__link:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--primary);
  transform: translateX(3px);
  box-shadow: -2px 0 0 var(--primary) inset;
}

.sidebar__link:hover i {
  transform: scale(1.1);
}

.sidebar__link.active {
  background: rgba(0, 217, 255, 0.1);
  color: var(--primary);
  box-shadow: -3px 0 0 var(--primary) inset;
}

/* Sidebar Tooltip */
.sidebar__link::before {
  content: attr(data-title);
  position: absolute;
  left: 70px;
  background: #252a3a;
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-10px);
  transition: all 0.2s ease;
  pointer-events: none;
  z-index: 1050;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar__link:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

.sidebar__footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  align-items: center;
  width: 100%;
  margin-bottom: 2rem;
}

/* ========================
   Footer - Clean Styles
   ======================== */
.footer__content--centered {
  text-align: center;
}

.footer__nav-section {
  margin-bottom: var(--space-xl);
}

.footer__nav-title {
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
  font-size: 1.1rem;
}

.footer__nav-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer__nav-link {
  color: var(--text-muted);
  transition: all var(--transition-fast);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.footer__nav-link i {
  margin-right: var(--space-xs);
}

.footer__brand-section {
  margin-bottom: var(--space-xl);
}

.footer__brand-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.footer__brand-desc {
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.footer__contact-panel {
  margin-bottom: var(--space-lg);
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.footer__contact-title {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.footer__contact-grid {
  display: grid;
  gap: var(--space-sm);
  max-width: 300px;
  margin: 0 auto;
  text-align: left;
}

.footer__contact-item {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer__contact-item i {
  width: 20px;
  margin-right: var(--space-sm);
  color: var(--primary);
}

.footer__contact-item .label {
  margin-right: var(--space-sm);
}

.footer__contact-item .value {
  color: var(--text-secondary);
}

.footer__social-links {
  justify-content: center;
}

.footer__meta-section {
  border-top: 1px solid var(--border);
  padding-top: var(--space-lg);
}

.footer__meta-text {
  color: var(--text-disabled);
  font-size: 0.8rem;
  margin-bottom: var(--space-sm);
}

.footer__version {
  margin-left: 8px;
  opacity: 0.8;
  border: 1px solid var(--text-disabled);
  padding: 0 4px;
  border-radius: 4px;
}

.footer__map-container {
  margin-bottom: var(--space-sm);
  display: flex;
  justify-content: center;
  min-height: 100px;
}

.footer__tech-tags {
  font-size: 0.75rem;
  color: var(--text-disabled);
}

.footer__copyright {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
}

/* ========================
   Contact Section
   ======================== */
.contact-card-icon {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
}

.contact-card-icon i {
  font-size: 1.5rem;
  color: white;
}

.contact-card-icon--primary {
  background: var(--gradient-primary);
}

.contact-card-icon--accent {
  background: var(--gradient-accent);
}

.contact-card-icon--success {
  background: var(--gradient-success);
}

.contact-card-title {
  text-align: center;
  margin-bottom: var(--space-sm);
}

.contact-card-desc {
  text-align: center;
  margin-bottom: var(--space-md);
  color: var(--text-muted);
}

.contact-card-btn {
  width: 100%;
}

.contact-card-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.contact-method {
  display: flex;
  align-items: center;
  padding: var(--space-md);
  transition: transform 0.2s ease, background-color 0.2s ease;
  border-radius: var(--radius-md);
}

.contact-method:hover {
  background-color: var(--surface-alt);
  transform: translateX(5px);
}

.contact-icon-container {
  background: rgba(88, 166, 255, 0.1);
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-lg);
  transition: all 0.3s ease;
}

.contact-method:hover .contact-icon-container {
  background: var(--primary);
}

.contact-icon {
  font-size: 1.75rem;
  color: var(--primary);
  transition: all 0.3s ease;
}

.contact-method:hover .contact-icon {
  color: white;
  transform: scale(1.1);
}

.contact-details {
  flex: 1;
}

.contact-details h4 {
  margin-bottom: var(--space-xs);
  font-size: 1.1rem;
  color: var(--text);
}

.contact-link {
  font-size: 1rem;
  font-weight: 500;
  display: block;
  margin-bottom: var(--space-xs);
}

.contact-description {
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0;
}

/* ========================
   Back to Top Button
   ======================== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 45px;
  height: 45px;
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary);
  color: white;
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}