:root {
  --bg: #3B3D4A;
  --bg-gradient: #485578;
  --card: #303548;
  --text: #FFFFFF;
  --accent: #788ABA;
  --border: #001E4C;
  --overlay-bg: rgba(0, 0, 0, 0.6);
  --panel-bg: rgba(48, 53, 72, 0.9);
  --panel-bg-strong: rgba(48, 53, 72, 1);
  --panel-bg-menu: rgba(48, 53, 72, 0.95);
  --loop-dots: rgba(255, 255, 255, 0.4);
  --loop-dots-hover: rgba(255, 255, 255, 0.7);
  --font: "Zen Maru Gothic", "Noto Sans TC", "Noto Sans SC", "Noto Sans JP", "Noto Sans KR", system-ui, -apple-system, "Segoe UI", sans-serif;
  /* 0.825 is the aspect-ratio of the background image */
  --bg-image-height: calc(100svw * 0.825);
}

* {
  box-sizing: border-box;
  font-family: var(--font);
  font-weight: 400;
  font-style: normal;
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

.bg-img {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  min-height: 100%;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(to bottom, transparent 60%, var(--bg-gradient) 100%),
    url('images/background.jpg');
  background-repeat: no-repeat, no-repeat;
  background-size: 100% var(--bg-image-height), 100% auto;
}

.bg-gradient {
  position: absolute;
  top: var(--bg-image-height);
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(to bottom, var(--bg-gradient) 0%, transparent 50%);
}

/* Language Dropdown */
.language-select {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 100;
}

.language-selected {
  all: unset;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.35rem 0.6rem;
  font-size: 1.2rem;
  line-height: 1;
  cursor: pointer;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.language-selected:hover {
  background: var(--panel-bg-strong);
}

.language-selected:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.language-flag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.language-caret {
  opacity: 0.8;
  transform: translateY(-1px);
}

.language-options {
  display: none;
  position: absolute;
  top: calc(100% + 0.35rem);
  right: 0;
  list-style: none;
  margin: 0;
  padding: 0.3rem 0;
  background: var(--panel-bg-menu);
  border: 1px solid var(--border);
  border-radius: 12px;
  min-width: max-content;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.language-select.is-open .language-options {
  display: block;
}

.language-options li {
  padding: 0.45rem 1rem;
  font-size: 0.9rem;
  color: var(--text);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.language-options li:hover {
  background: rgba(120, 138, 186, 0.25);
}

.language-options li.is-active {
  background: rgba(120, 138, 186, 0.35);
}

/* Main container */
.container {
  max-width: 900px;
  margin: auto;
  padding: 3rem 1.5rem 1.5rem;
  position: relative;
  z-index: 1;
}

.container > img[src*="logo"] {
  display: block;
  margin: 0 auto 1rem;
  max-width: 200px;
  height: auto;
}

/* Social links */
.social-icons {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.svg-icon {
  width: 1.5rem;
  height: 1.5rem;
  display: inline-block;
  vertical-align: middle;
}

.social-groups {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  padding-bottom: 1.5rem;
  margin-bottom: 1.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.social-icon-group {
  display: flex;
  padding: 0.5rem;
  align-items: center;
  position: relative;
  border: 3px solid var(--text);
  border-top: 3px solid #00000000;
  border-radius: 40px;
}

.group-label {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -80%);
  color: var(--text);
  padding: 0 0.5rem;
  font-size: 1rem;
  font-weight: 700;
  text-align: center;
  line-height: 1;
  white-space: nowrap;
  z-index: 3;
  pointer-events: none;
}

.social-icons a,
.social-icon-group a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.8rem;
  height: 3rem;
  color: var(--text);
  text-decoration: none;
  font-size: 1.5rem;
  transition: transform 0.3s, color 0.3s;
}

/* Merch links */
.merch-links {
  gap: 0.5rem;
}

.merch-links a {
  width: auto;
  padding: 0 0.75rem;
  gap: 0.5rem;
  font-size: 1.4rem;
}

.merch-link-text {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.social-icons a:hover,
.social-icon-group a:hover {
  transform: translateY(-4px);
  color: var(--accent);
}

/* Card sections */
.card-title {
  background: var(--accent);
  border: 4px solid var(--border);
  border-radius: 16px;
  padding: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  position: relative;
  z-index: 2;
}

.card-title h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 900;
  color: var(--border);
}

.topic-icon {
  height: 2rem;
}

.card,
.card-showcase {
  background: var(--card);
  border: 4px solid var(--border);
  border-top: 4px solid #00000000;
  border-radius: 16px;
  transform: translateY(-1rem);
  position: relative;
  z-index: 1;
  padding: 1rem;
  margin-bottom: 1rem;
  margin-left: 0.5rem;
  margin-right: 0.5rem;
  box-shadow: 0 10px 30px var(--card);
}

.card-showcase {
  border: 4px solid var(--border);
}

/* Profile */
.profile {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  flex-direction: row-reverse;
  justify-content: center;
  text-align: left;
}

.profile img {
  margin-top: 0.5rem;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  background-color: var(--text);
}

.profile h1 {
  margin-top: 0.5rem;
  font-size: 1.2rem;
}

/* Commission grid */
.commission-grid {
  margin-top: 0.5rem;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

@media (max-width: 720px) {
  .commission-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.commission-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}

.commission-item img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.commission-label {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  text-align: center;
}

/* Commission lightbox */
.commission-lightbox,
.popup-overlay {
  position: fixed;
  inset: 0;
  padding: 1.5rem;
  border: none;
  background: transparent;
  display: none;
  align-items: center;
  justify-content: center;
}

.commission-lightbox {
  z-index: 120;
}

.commission-lightbox[open] {
  display: flex;
}

.lightbox-window {
  width: min(520px, 92vw);
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 1.5rem 1.75rem;
  position: relative;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
}

.lightbox-content-slot h2 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
  color: var(--text);
}

.lightbox-content-slot p {
  margin: 0;
  color: var(--text);
}

/* loop gallery */
.loop-gallery,
.loop-gallery-showcase {
  margin-top: 0.5rem;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 12px;
  overflow: hidden;
  border: 0;
  background: var(--bg);
  position: relative;
}

.loop-gallery-showcase {
  margin-top: 0;
}

.loop-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  opacity: 0;
  transform: translateX(0);
  z-index: 1;
}

.loop-image.is-active {
  opacity: 1;
}

.loop-image.slide-in-next,
.loop-image.slide-in-prev,
.loop-image.slide-out-next,
.loop-image.slide-out-prev {
  animation-duration: 400ms;
  animation-timing-function: ease;
}

.loop-image.slide-in-next {
  --slide-from: 12%;
  animation-name: loop-slide-in;
}

.loop-image.slide-in-prev {
  --slide-from: -12%;
  animation-name: loop-slide-in;
}

.loop-image.slide-out-next {
  --slide-to: -12%;
  animation-name: loop-slide-out;
}

.loop-image.slide-out-prev {
  --slide-to: 12%;
  animation-name: loop-slide-out;
}

@keyframes loop-slide-in {
  from {
    opacity: 0;
    transform: translateX(var(--slide-from, 0));
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes loop-slide-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(var(--slide-to, 0));
  }
}

.loop-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: 0;
  background: rgba(0, 0, 0, 0.6);
  color: var(--text);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform 0.2s, color 0.2s, background 0.2s;
  z-index: 2;
}

.loop-arrow:hover {
  color: var(--accent);
  background: rgba(0, 0, 0, 0.8);
  transform: translateY(-50%) scale(1.05);
}

.loop-arrow-left {
  left: 0.5rem;
}

.loop-arrow-right {
  right: 0.5rem;
}

/* Loop gallery pagination dots */
.loop-dots {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.5rem;
  z-index: 2;
  border-radius: 1rem;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.8);
}

.loop-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  border: none;
  padding: 0;
  background: var(--loop-dots);
  cursor: pointer;
  transition: background 0.2s, transform 0.2s;
}

.loop-dot:hover {
  background: var(--loop-dots-hover);
  transform: scale(1.2);
}

.loop-dot.is-active {
  background: var(--text);
}

/* Popup */
.popup-overlay {
  z-index: 250;
}

.popup-overlay[open] {
  display: flex;
}

.popup-window {
  position: relative;
  width: min(90vw, 420px);
  background: var(--card);
  border: 4px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem 2rem 1.75rem;
  text-align: center;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

.popup-message {
  margin: 0.5rem 0 1.25rem;
  font-size: 1rem;
  color: var(--text);
}

.popup-action {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 700;
  transition: transform 0.2s, box-shadow 0.2s;
}

.popup-action:hover,
.back-to-top-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

/* Back to Top */
.back-to-top {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.back-to-top-button {
  padding: 0.6rem 1.4rem;
  background: var(--accent);
  color: var(--bg);
  border: 2px solid var(--border);
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 3rem;
  color: var(--text);
  font-size: 0.9rem;
}

/* Common */
.lightbox-close,
.popup-close {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

.lightbox-close:hover,
.popup-close:hover {
  color: var(--accent);
}

.commission-lightbox::backdrop,
.popup-overlay::backdrop {
  background: var(--overlay-bg);
}

.popup-message-source,
.lightbox-content {
  display: none;
}

.profile a,
footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.profile a:hover,
footer a:hover {
  color: var(--text);
  text-decoration: underline;
}