:root {
  --primary-color: #3b82f6;
  --light-bg: #f3f4f6;
  --light-card-bg: #ffffff;
}

body {
  font-family: 'Noto Sans KR', sans-serif;
  background:
    radial-gradient(1200px 480px at 10% -10%, rgba(59, 130, 246, 0.12), transparent 60%),
    radial-gradient(900px 420px at 92% -8%, rgba(14, 165, 233, 0.1), transparent 62%),
    linear-gradient(180deg, #f8fbff 0%, #f2f6fb 38%, #eef3f8 100%);
  background-color: var(--light-bg);
  color: #1f2937;
  overflow-x: hidden;
  padding-bottom: 84px;
}

body.photo-lightbox-open {
  overflow: hidden;
}

img {
  -webkit-user-drag: none;
  user-select: none;
  -webkit-touch-callout: none;
}

/* Modal blur for nickname modal only */
body.modal-open > *:not(#nickname-modal) {
  filter: blur(4px);
  transition: filter 0.3s ease-in-out;
}

.header-nav-container {
  background: rgba(255, 255, 255, 0.7);
  border-bottom: 1px solid rgba(203, 213, 225, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

#login-status-container,
#login-status-container * {
  pointer-events: auto;
}

#login-status-container {
  position: relative;
  z-index: 72;
}

.site-logo {
  mix-blend-mode: multiply;
  filter: saturate(1.02) contrast(1.02);
}

.hero-gradient-title {
  background: linear-gradient(to right, #60a5fa, #3b82f6);
  color: transparent;
  -webkit-background-clip: text;
  background-clip: text;
}

.nav-link.active {
  color: var(--primary-color);
  font-weight: 700;
}

.floating-nav {
  position: fixed;
  left: 50%;
  right: auto;
  margin-left: 0;
  margin-right: 0;
  bottom: 14px;
  transform: translateX(-50%);
  width: max-content;
  z-index: 65;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem;
  border-radius: 999px;
  border: 1px solid rgba(203, 213, 225, 0.7);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 14px 35px rgba(15, 23, 42, 0.16);
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.floating-nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.38rem;
  padding: 0.44rem 0.84rem;
  border-radius: 999px;
  color: #334155;
  font-size: 0.86rem;
  font-weight: 700;
  transition: background-color 0.2s ease, color 0.2s ease;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

.floating-nav-link i {
  font-size: 0.82rem;
  line-height: 1;
}

.floating-nav-link:hover {
  background: rgba(255, 255, 255, 0.75);
  color: #0f172a;
}

.floating-nav-link.active {
  background: #2563eb;
  color: #ffffff;
}

#mobile-menu {
  transition: transform 0.3s ease-in-out;
  background-color: var(--light-card-bg);
}

#mobile-menu[aria-hidden="true"] {
  pointer-events: none;
}

.section-wrapper {
  max-width: 1200px;
  margin: auto;
  padding: 0 20px;
}

.chapter-group {
  margin: 48px 0;
  padding: 28px 20px 10px;
  border-radius: 28px;
  border: 1px solid #dbe5ff;
  position: relative;
}

.chapter-identity {
  background: linear-gradient(180deg, #eff6ff 0%, #f8fbff 100%);
}

.chapter-archive {
  background: linear-gradient(180deg, #f8fafc 0%, #f3f4f6 100%);
  border-color: #d1d5db;
}

.chapter-community {
  background: linear-gradient(180deg, #ecfeff 0%, #f8fafc 100%);
  border-color: #bae6fd;
}

.chapter-head {
  max-width: 760px;
  margin: 8px auto 12px;
  text-align: center;
  padding: 0 12px;
}

.chapter-head h2 {
  font-size: 2rem;
  font-weight: 900;
  color: #0f172a;
  margin-bottom: 0.4rem;
}

.window-panel {
  display: none;
}

.window-panel.window-active {
  display: block;
}

.window-panel.window-enter-forward {
  animation: panel-enter-forward 0.52s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.window-panel.window-enter-backward {
  animation: panel-enter-backward 0.52s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.window-panel.window-mobile-pop {
  animation: panel-mobile-pop 0.42s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.window-panel.window-enter-forward .hero-section-original,
.window-panel.window-enter-forward .section-container,
.window-panel.window-enter-backward .hero-section-original,
.window-panel.window-enter-backward .section-container,
.window-panel.window-mobile-pop .hero-section-original,
.window-panel.window-mobile-pop .section-container {
  animation: panel-content-rise 0.5s ease both;
}

.window-panel.window-enter-forward .section-container:nth-of-type(1),
.window-panel.window-enter-backward .section-container:nth-of-type(1),
.window-panel.window-mobile-pop .section-container:nth-of-type(1) {
  animation-delay: 0.04s;
}

.window-panel.window-enter-forward .section-container:nth-of-type(2),
.window-panel.window-enter-backward .section-container:nth-of-type(2),
.window-panel.window-mobile-pop .section-container:nth-of-type(2) {
  animation-delay: 0.1s;
}

.window-panel.window-enter-forward .section-container:nth-of-type(3),
.window-panel.window-enter-backward .section-container:nth-of-type(3),
.window-panel.window-mobile-pop .section-container:nth-of-type(3) {
  animation-delay: 0.16s;
}

.window-panel.window-enter-forward .section-container:nth-of-type(4),
.window-panel.window-enter-backward .section-container:nth-of-type(4),
.window-panel.window-mobile-pop .section-container:nth-of-type(4) {
  animation-delay: 0.22s;
}

.window-panel.window-enter-forward .section-container:nth-of-type(5),
.window-panel.window-enter-backward .section-container:nth-of-type(5),
.window-panel.window-mobile-pop .section-container:nth-of-type(5) {
  animation-delay: 0.28s;
}

@keyframes panel-enter-forward {
  from {
    opacity: 0;
    transform: translate3d(30px, 0, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes panel-enter-backward {
  from {
    opacity: 0;
    transform: translate3d(-30px, 0, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes panel-mobile-pop {
  from {
    opacity: 0;
    transform: translate3d(0, 15px, 0);
  }
  to {
    opacity: 1;
    transform: translate3d(0, 0, 0);
  }
}

@keyframes panel-content-rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section-container {
  padding: 2.5rem 1.5rem;
  opacity: 0;
  transform: translateY(50px);
  transition: opacity 1s ease-out, transform 1s ease-out;
  border-radius: 30px;
  margin: 40px 0;
  background-color: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.07), 0 4px 6px -4px rgba(0, 0, 0, 0.07);
}

.section-container.visible {
  opacity: 1;
  transform: translateY(0);
}

.hero-section-original {
  position: relative;
  overflow: hidden;
  border-radius: 30px;
  padding-top: 50%;
  margin: 40px 0;
  border: 1px solid rgba(226, 232, 240, 0.9);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

.hero-image-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-original {
  background-color: rgba(255, 255, 255, 0.96);
  border-radius: 15px;
  overflow: hidden;
  width: calc(33.333% - 22px);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid #e5e7eb;
  position: relative;
}

.card-original:hover {
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  transform: translateY(-5px);
  border-color: var(--primary-color);
}

.card-image-original {
  width: 100%;
  height: 350px;
  object-fit: cover;
}

.card-original h3 { color: #111827; }
.card-original p { color: #6b7280; }

/* Photo gallery */
#photo-gallery-container {
  width: 100%;
  margin-top: 0.5rem;
}

#photo-gallery {
  column-count: 4;
  column-gap: 0.5rem;
}

.photo-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: #6b7280;
  padding: 2rem 0;
}

.photo-card-item {
  border-radius: 0.9rem;
  overflow: hidden;
  margin-bottom: 0.5rem;
  position: relative;
  border: 1px solid rgba(226, 232, 240, 0.95);
  background-color: transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  break-inside: avoid;
  display: inline-block;
  width: 100%;
}

.photo-card-item:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(15, 23, 42, 0.14);
}

.photo-card-item img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.24s ease;
}

.photo-card-item:hover img {
  transform: scale(1.045);
}

.photo-card-item .delete-btn {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  background-color: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  color: white;
  border-radius: 9999px;
  width: 1.65rem;
  height: 1.65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  transition: background-color 0.2s, opacity 0.2s ease;
  opacity: 0;
  border: none;
  cursor: pointer;
}

.photo-card-item.has-delete:hover .delete-btn {
  opacity: 1;
}

.photo-card-item .delete-btn:hover {
  background-color: rgba(220, 38, 38, 0.9);
}

.photo-lightbox {
  position: fixed;
  inset: 0;
  z-index: 130;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(2, 6, 23, 0.86);
}

.photo-lightbox.hidden {
  display: none;
}

.photo-lightbox-image {
  max-width: min(96vw, 1440px);
  max-height: 90vh;
  width: auto;
  height: auto;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
}

.photo-lightbox-close {
  position: absolute;
  top: calc(12px + env(safe-area-inset-top));
  right: calc(12px + env(safe-area-inset-right));
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.6);
  color: #fff;
  font-size: 1.9rem;
  line-height: 1;
  cursor: pointer;
  display: grid;
  place-items: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.photo-lightbox-close:hover {
  background: rgba(30, 41, 59, 0.82);
}

.toast-container {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  min-width: 220px;
  max-width: 360px;
  color: #fff;
  border-radius: 0.6rem;
  padding: 0.75rem 0.9rem;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
  opacity: 0;
  transform: translateY(-8px);
  animation: toast-in 0.22s ease forwards;
}

.toast.info { background-color: #2563eb; }
.toast.success { background-color: #15803d; }
.toast.error { background-color: #b91c1c; }

.debug-panel {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: calc(84px + env(safe-area-inset-bottom));
  z-index: 140;
  background: rgba(15, 23, 42, 0.9);
  color: #e2e8f0;
  border-radius: 14px;
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.45;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.28);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  white-space: pre-wrap;
  word-break: break-word;
}

.debug-panel:empty {
  display: none;
}

@keyframes toast-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1024px) {
  .card-original { width: calc(50% - 20px); }
  #photo-gallery { column-count: 3; }
}

@media (max-width: 768px) {
  .window-panel.window-enter-forward,
  .window-panel.window-enter-backward {
    animation: panel-mobile-pop 0.42s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  }
}

@media (max-width: 640px) {
  .chapter-group {
    padding-left: 10px;
    padding-right: 10px;
  }

  .floating-nav {
    width: calc(100% - 120px);
    max-width: 280px;
    justify-content: space-between;
    bottom: calc(8px + env(safe-area-inset-bottom));
    left: 0;
    right: 0;
    margin-left: auto;
    margin-right: auto;
    transform: none;
  }

  .floating-nav-link {
    flex: 1;
    text-align: center;
    padding-left: 0.5rem;
    padding-right: 0.5rem;
    font-size: 0.75rem;
    gap: 0.28rem;
  }

  .floating-nav-link i {
    font-size: 0.72rem;
  }

  .card-original { width: 100%; }
  #photo-gallery { column-count: 3; }
  .debug-panel {
    font-size: 11px;
    padding: 9px 10px;
  }
}

@media (max-width: 420px) {
  #photo-gallery { column-count: 2; }

  .photo-lightbox-image {
    max-width: 95vw;
    max-height: 84vh;
  }
}

@media (hover: none) {
  .photo-card-item.has-delete .delete-btn {
    opacity: 0.9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .window-panel.window-enter-forward,
  .window-panel.window-enter-backward,
  .window-panel.window-mobile-pop,
  .window-panel.window-enter-forward .hero-section-original,
  .window-panel.window-enter-forward .section-container,
  .window-panel.window-enter-backward .hero-section-original,
  .window-panel.window-enter-backward .section-container,
  .window-panel.window-mobile-pop .hero-section-original,
  .window-panel.window-mobile-pop .section-container {
    animation: none !important;
  }
}