/* ============================================
   陆飞设计 — Custom Styles
   Interactions, animations, responsive
   ============================================ */

/* ---- Scroll Animations ---- */
html.js [data-animate] {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

html.js [data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
html.js [data-animate-stagger] > * {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

html.js [data-animate-stagger].is-visible > * {
  opacity: 1;
  transform: translateY(0);
}

html.js [data-animate-stagger].is-visible > *:nth-child(1) { transition-delay: 0s; }
html.js [data-animate-stagger].is-visible > *:nth-child(2) { transition-delay: 0.08s; }
html.js [data-animate-stagger].is-visible > *:nth-child(3) { transition-delay: 0.16s; }
html.js [data-animate-stagger].is-visible > *:nth-child(4) { transition-delay: 0.24s; }
html.js [data-animate-stagger].is-visible > *:nth-child(5) { transition-delay: 0.32s; }
html.js [data-animate-stagger].is-visible > *:nth-child(6) { transition-delay: 0.40s; }
html.js [data-animate-stagger].is-visible > *:nth-child(7) { transition-delay: 0.48s; }
html.js [data-animate-stagger].is-visible > *:nth-child(8) { transition-delay: 0.56s; }
html.js [data-animate-stagger].is-visible > *:nth-child(9) { transition-delay: 0.64s; }
html.js [data-animate-stagger].is-visible > *:nth-child(10) { transition-delay: 0.72s; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  [data-animate],
  [data-animate-stagger] > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ---- Header ---- */
.site-header {
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}

.site-header.scrolled {
  box-shadow: var(--qimu-shadow-1);
}

/* ---- Mobile Menu ---- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  z-index: 60;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background: var(--qimu-background);
  border-left: 1px solid var(--qimu-border);
  padding: 80px 32px 32px;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  overflow-y: auto;
}

.mobile-menu.open {
  display: block;
  transform: translateX(0);
}

.mobile-menu a {
  display: block;
  padding: 16px 0;
  font-size: 1.125rem;
  font-family: var(--qimu-font-serif);
  border-bottom: 1px solid var(--qimu-border);
  color: var(--qimu-foreground);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.mobile-menu a:hover {
  color: var(--qimu-primary);
  padding-left: 8px;
}

.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(44, 42, 38, 0.3);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.open {
  display: block;
  opacity: 1;
}

.menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
  background: none;
  border: none;
  color: var(--qimu-foreground);
}

@media (min-width: 768px) {
  .menu-toggle { display: none; }
}

/* ---- Hero ---- */
.hero-image-wrap {
  position: relative;
  overflow: hidden;
}

.hero-image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(250, 248, 245, 0.15) 100%);
  pointer-events: none;
}

/* ---- Work Cards ---- */
.work-card {
  cursor: pointer;
  transition: box-shadow 0.4s ease, transform 0.4s ease;
}

.work-card:hover {
  box-shadow: var(--qimu-shadow-2);
  transform: translateY(-4px);
}

/* ---- Lightbox ---- */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(44, 42, 38, 0.92);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 32px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.open {
  display: flex;
  opacity: 1;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  border-radius: var(--qimu-radius-md);
  box-shadow: var(--qimu-shadow-3);
  transition: opacity 0.15s ease;
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  border: none;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Gallery navigation */
.lightbox-nav {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 24px;
  transform: translateY(-50%);
  pointer-events: none;
}

.lightbox-prev,
.lightbox-next {
  pointer-events: auto;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  border: none;
  color: #fff;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.08);
}

.lightbox-counter {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
  font-family: var(--qimu-font-sans);
  letter-spacing: 0.05em;
}

.lightbox-caption {
  position: absolute;
  bottom: 32px;
  left: 0;
  right: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--qimu-font-serif);
  font-size: 1.125rem;
}

/* ---- QR Code ---- */
.qr-wrap {
  display: inline-block;
  padding: 24px;
  background: var(--qimu-card);
  border: 1px solid var(--qimu-border);
  border-radius: var(--qimu-radius-lg);
  box-shadow: var(--qimu-shadow-2);
  transition: transform 0.3s ease;
}

.qr-wrap:hover {
  transform: scale(1.02);
}

/* ---- Active Nav Link ---- */
.nav-link {
  position: relative;
  padding-bottom: 2px;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--qimu-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

/* ---- Scroll to top ---- */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--qimu-card);
  border: 1px solid var(--qimu-border);
  border-radius: 50%;
  cursor: pointer;
  color: var(--qimu-foreground);
  box-shadow: var(--qimu-shadow-1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, box-shadow 0.2s ease;
  z-index: 40;
}

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

.scroll-top:hover {
  box-shadow: var(--qimu-shadow-2);
  color: var(--qimu-primary);
}

/* ---- Image loading ---- */
img {
  background: var(--qimu-muted);
}

/* ---- Responsive Enhancements ---- */
@media (max-width: 640px) {
  .hero-title {
    font-size: 2.25rem !important;
  }
  .section-title {
    font-size: 1.75rem !important;
  }
}