/* ============================================================
   DoubleC Studyverse — 核心栏目视觉（阶段 03）
   ARTICLES / AI LAB / MOMENTS / FRIENDS / GUESTBOOK / ABOUT
   延续：深空 + 银色粒子 + Editorial
   ============================================================ */

/* ============================================================
   栏目页通用：顶部标题区
   ============================================================ */
.dc-ai-head,
.dc-friends-head,
.dc-guestbook-head {
  margin: 8px 0 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--dc-line);
}

.dc-ai-eyebrow,
.dc-friends-eyebrow,
.dc-guestbook-eyebrow {
  display: inline-block;
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--dc-ink-4);
}

.dc-ai-title,
.dc-friends-title,
.dc-guestbook-title {
  margin: 10px 0 8px;
  font-family: var(--dc-serif);
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 800;
  color: var(--dc-ink-0);
  letter-spacing: 0.02em;
}

.dc-ai-sub,
.dc-friends-sub,
.dc-guestbook-sub {
  margin: 0;
  font-size: 14px;
  color: var(--dc-ink-3);
  letter-spacing: 0.04em;
}

.dc-ai-principles {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 18px;
}

.dc-ai-principles span {
  padding: 5px 12px;
  color: var(--dc-ink-2);
  font-size: 12px;
  letter-spacing: 0.06em;
  border: 1px solid rgba(184, 169, 198, 0.22);
  border-radius: 999px;
  background: rgba(184, 169, 198, 0.06);
}

/* ============================================================
   ARTICLES — 文章列表（复用 #recent-posts）
   ============================================================ */
#articles + #recent-posts .recent-post-item,
.recent-post-item {
  background: var(--dc-glass) !important;
  border: 1px solid var(--dc-glass-border) !important;
  border-radius: 14px !important;
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.32);
  overflow: hidden;
  transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
}

.recent-post-item:hover {
  border-color: rgba(174, 180, 188, 0.34) !important;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.46), 0 0 34px rgba(209, 213, 219, 0.08);
  transform: translateY(-2px);
}

.recent-post-item .post_cover {
  margin: 0;
}

.recent-post-item .post_cover img,
.recent-post-item .post_cover .post-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.recent-post-item .recent-post-info {
  padding: 22px 26px;
}

.recent-post-item .article-title {
  color: var(--dc-ink-0) !important;
  font-family: var(--dc-serif);
  font-weight: 700;
  transition: color .25s ease;
}

.recent-post-item .article-title:hover {
  color: #fff !important;
}

.recent-post-item .article-meta-wrap,
.recent-post-item .article-meta-wrap a {
  color: var(--dc-ink-4) !important;
}

.recent-post-item .article-meta__categories,
.recent-post-item .article-meta__tags {
  color: var(--dc-ink-3) !important;
}

.recent-post-item .content {
  color: var(--dc-ink-3) !important;
}

/* ============================================================
   AI LAB — 作品集列表
   ============================================================ */
.dc-ai-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.dc-ai-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--dc-glass);
  border: 1px solid var(--dc-glass-border);
  border-radius: 14px;
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.32);
  transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
}

.dc-ai-card:hover {
  border-color: rgba(174, 180, 188, 0.34);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.46), 0 0 34px rgba(209, 213, 219, 0.08);
  transform: translateY(-3px);
}

.dc-ai-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, #0D1117, #141A22);
}

.dc-ai-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .6s ease;
}

.dc-ai-card:hover .dc-ai-cover img {
  transform: scale(1.05);
}

.dc-ai-cover-color {
  width: 100%;
  height: 100%;
}

.dc-ai-cover-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--dc-serif);
  font-size: 44px;
  font-weight: 800;
  color: rgba(209, 213, 219, 0.35);
}

.dc-ai-card-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dc-ai-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.dc-ai-type {
  font-family: var(--dc-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dc-accent);
  padding: 3px 9px;
  border: 1px solid var(--dc-glass-border);
  border-radius: 999px;
}

.dc-ai-date {
  font-family: var(--dc-mono);
  font-size: 11px;
  color: var(--dc-ink-4);
}

.dc-ai-card-title {
  font-family: var(--dc-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--dc-ink-0);
}

.dc-ai-card-status {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--dc-accent);
  font-size: 11px;
  letter-spacing: 0.03em;
}

.dc-ai-card-status i {
  font-size: 9px;
}

.dc-ai-card-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--dc-ink-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.dc-ai-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 2px;
}

.dc-ai-tag {
  font-size: 11px;
  color: var(--dc-ink-4);
  padding: 2px 8px;
  border: 1px solid var(--dc-line);
  border-radius: 999px;
}

.dc-ai-empty,
.dc-friends-empty,
.dc-guestbook-empty {
  padding: 60px 0;
  text-align: center;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--dc-ink-4);
}

.dc-friends-empty strong {
  display: block;
  margin-bottom: 8px;
  color: var(--dc-ink-1);
  font-family: var(--dc-serif);
  font-size: 18px;
}

.dc-friends-empty p {
  margin: 0 auto 18px;
  max-width: 520px;
  color: var(--dc-ink-3);
  line-height: 1.8;
}

.dc-friends-mail {
  display: inline-flex;
  padding: 9px 16px;
  color: var(--dc-ink-1) !important;
  border: 1px solid rgba(184, 169, 198, 0.28);
  border-radius: 9px;
  background: rgba(184, 169, 198, 0.07);
}

.dc-friends-mail:hover {
  border-color: rgba(184, 169, 198, 0.52);
  background: rgba(184, 169, 198, 0.12);
}

/* ============================================================
   AI LAB — 详情页
   ============================================================ */
.dc-ai-post {
  position: relative;
}

#dc-ai-post {
  background: var(--dc-glass);
  border: 1px solid var(--dc-glass-border);
  border-radius: 14px;
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.4);
  color: var(--dc-ink-1);
}

@media screen and (max-width: 768px) {
  #dc-ai-post {
    padding: 26px 16px !important;
  }
}

.dc-ai-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--dc-ink-3);
  transition: color .25s ease, gap .25s ease;
}

.dc-ai-back:hover {
  color: #fff;
  gap: 12px;
}

.dc-ai-banner {
  margin-bottom: 26px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--dc-glass-border);
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.4);
}

.dc-ai-banner img {
  display: block;
  width: 100%;
  max-height: 440px;
  object-fit: cover;
}

.dc-ai-banner-color {
  width: 100%;
  height: 240px;
}

.dc-ai-post-head {
  margin-bottom: 24px;
}

.dc-ai-post-labels {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.dc-ai-post-type,
.dc-ai-post-status {
  display: inline-block;
  font-family: var(--dc-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dc-ink-2);
  padding: 4px 11px;
  border: 1px solid var(--dc-glass-border);
  border-radius: 999px;
}

.dc-ai-post-status {
  color: var(--dc-accent);
  border-color: rgba(184, 169, 198, 0.28);
  background: rgba(184, 169, 198, 0.07);
}

.dc-ai-post-title {
  margin: 0 0 10px;
  font-family: var(--dc-serif);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--dc-ink-0);
  line-height: 1.15;
}

.dc-ai-post-desc {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--dc-ink-3);
}

.dc-ai-post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  color: var(--dc-ink-4);
}

.dc-ai-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.dc-ai-tool {
  font-family: var(--dc-mono);
  font-size: 12px;
  color: var(--dc-ink-3);
  padding: 3px 10px;
  border: 1px solid var(--dc-line);
  border-radius: 999px;
}

.dc-ai-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

.dc-ai-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--dc-ink-1);
  background: rgba(209, 213, 219, 0.06);
  border: 1px solid var(--dc-glass-border);
  border-radius: 10px;
  transition: border-color .3s ease, background .3s ease, box-shadow .3s ease;
}

.dc-ai-btn:hover {
  color: #fff;
  border-color: rgba(174, 180, 188, 0.4);
  background: rgba(209, 213, 219, 0.1);
  box-shadow: 0 0 22px rgba(209, 213, 219, 0.12);
}

.dc-ai-content {
  font-size: 15px;
  line-height: 1.85;
  color: var(--dc-ink-1);
}

.dc-project-materials {
  margin-top: 34px;
  padding: 24px;
  border: 1px solid rgba(184, 169, 198, 0.2);
  border-radius: 14px;
  background:
    radial-gradient(75% 100% at 0% 0%, rgba(184, 169, 198, 0.08), transparent 65%),
    rgba(209, 213, 219, 0.025);
}

.dc-project-materials-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.dc-project-materials-eyebrow {
  display: block;
  margin-bottom: 5px;
  color: var(--dc-accent);
  font-family: var(--dc-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
}

.dc-project-materials-head h2 {
  margin: 0 !important;
  padding: 0 !important;
  font-size: 20px;
}

.dc-project-materials-head h2::before {
  display: none !important;
}

.dc-project-materials-count {
  color: var(--dc-ink-4);
  font-size: 12px;
}

.dc-project-files {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.dc-project-file {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  padding: 12px 14px;
  color: var(--dc-ink-2) !important;
  border: 1px solid var(--dc-line);
  border-radius: 10px;
  background: rgba(5, 6, 8, 0.28);
}

.dc-project-file:hover {
  border-color: rgba(184, 169, 198, 0.36);
  background: rgba(184, 169, 198, 0.07);
}

.dc-project-file > i {
  flex: 0 0 auto;
  color: var(--dc-accent);
}

.dc-project-file-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.dc-project-file-meta strong {
  overflow: hidden;
  color: var(--dc-ink-1);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dc-project-file-meta span {
  margin-top: 2px;
  color: var(--dc-ink-4);
  font-size: 10px;
}

.dc-project-materials-empty {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px;
  border: 1px dashed rgba(184, 169, 198, 0.28);
  border-radius: 11px;
  background: rgba(5, 6, 8, 0.24);
}

.dc-project-materials-empty > i {
  color: var(--dc-accent);
  font-size: 24px;
}

.dc-project-materials-empty strong {
  color: var(--dc-ink-1);
  font-size: 13px;
}

.dc-project-materials-empty p {
  margin: 4px 0 0;
  color: var(--dc-ink-4);
  font-size: 12px;
  line-height: 1.65;
}

.dc-project-materials-todo {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--dc-line);
}

.dc-project-materials-todo > span {
  color: var(--dc-ink-3);
  font-size: 12px;
  font-weight: 600;
}

.dc-project-materials-todo ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 0 !important;
  padding: 0 !important;
}

.dc-project-materials-todo li {
  margin: 0 !important;
  padding: 4px 10px;
  color: var(--dc-ink-3);
  font-size: 11px;
  list-style: none;
  border: 1px solid var(--dc-line);
  border-radius: 999px;
}

@media screen and (max-width: 768px) {
  .dc-project-materials {
    padding: 18px 15px;
  }

  .dc-project-files {
    grid-template-columns: 1fr;
  }

  .dc-project-materials-head {
    align-items: flex-start;
  }
}

.dc-ai-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--dc-line);
}

.dc-ai-tags-row .dc-ai-tag {
  font-size: 12px;
  padding: 4px 12px;
}

/* ============================================================
   MOMENTS — 碎碎念时间轴（shuoshuo）
   ============================================================ */
/* 提高优先级，覆盖 Butterfly 的 #article-container .shuoshuo-item 白底（--card-bg: #fff） */
#article-container .shuoshuo-item,
.shuoshuo-item {
  position: relative;
  margin-bottom: 22px;
  padding: 20px 24px;
  background: var(--dc-jelly) !important;
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border: 1px solid var(--dc-jelly-border) !important;
  border-radius: 14px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: border-color .3s ease, transform .3s ease;
}

#article-container .shuoshuo-item:hover,
.shuoshuo-item:hover {
  border-color: rgba(209, 213, 219, 0.34) !important;
  transform: translateY(-2px);
}

.shuoshuo-item .shuoshuo-avatar img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--dc-glass-border);
}

.shuoshuo-item .shuoshuo-author {
  font-family: var(--dc-serif);
  font-weight: 700;
  color: var(--dc-ink-0);
}

.shuoshuo-item .shuoshuo-date {
  font-family: var(--dc-mono);
  font-size: 12px;
  color: var(--dc-ink-4);
}

.shuoshuo-item .shuoshuo-content {
  font-size: 14px;
  line-height: 1.75;
  color: var(--dc-ink-2);
}

.shuoshuo-item .shuoshuo-tag {
  font-size: 11px;
  color: var(--dc-ink-4);
  padding: 2px 9px;
  border: 1px solid var(--dc-line);
  border-radius: 999px;
}

.shuoshuo-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 8px;
}

.shuoshuo-navigation button {
  background: rgba(209, 213, 219, 0.05);
  border: 1px solid var(--dc-glass-border);
  color: var(--dc-ink-2);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  transition: all .25s ease;
}

.shuoshuo-navigation button:hover:not(:disabled) {
  color: #fff;
  border-color: rgba(174, 180, 188, 0.4);
}

.shuoshuo-navigation button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ============================================================
   FRIENDS — 银河友联
   ============================================================ */
.dc-friends-page {
  position: relative;
}

.dc-friends-galaxy {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.dc-friend-star {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 26px 18px 22px;
  background: var(--dc-glass);
  border: 1px solid var(--dc-glass-border);
  border-radius: 16px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.3);
  transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
}

.dc-friend-star:hover {
  border-color: rgba(174, 180, 188, 0.38);
  box-shadow: 0 18px 52px rgba(0, 0, 0, 0.44), 0 0 30px rgba(209, 213, 219, 0.1);
  transform: translateY(-4px);
}

.dc-friend-star-core {
  position: relative;
  width: 72px;
  height: 72px;
  margin-bottom: 14px;
}

.dc-friend-star-core::after {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(209, 213, 219, 0.22), transparent 70%);
  filter: blur(4px);
  pointer-events: none;
  transition: opacity .3s ease;
}

.dc-friend-star-core img {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 1px solid var(--dc-glass-border);
  object-fit: cover;
}

.dc-friend-star-name {
  font-family: var(--dc-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--dc-ink-0);
}

.dc-friend-star-desc {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--dc-ink-4);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 银河背景画布 */
.dc-galaxy-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.dc-friends-galaxy > * {
  position: relative;
  z-index: 1;
}

/* ============================================================
   GUESTBOOK — 星星留言板
   ============================================================ */
.dc-guestbook-page {
  position: relative;
}

.dc-guestbook-stars {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.dc-guest-star {
  position: relative;
  padding: 20px 22px;
  background: var(--dc-glass);
  border: 1px solid var(--dc-glass-border);
  border-radius: 14px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3);
  transition: border-color .3s ease, transform .3s ease, box-shadow .3s ease;
}

.dc-guest-star:hover {
  border-color: rgba(174, 180, 188, 0.34);
  box-shadow: 0 16px 46px rgba(0, 0, 0, 0.4), 0 0 26px rgba(209, 213, 219, 0.09);
  transform: translateY(-3px);
}

.dc-guest-star-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.dc-guest-star-avatar {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--dc-glass-border);
  background: linear-gradient(135deg, #1B2230, #0D1117);
  box-shadow: 0 0 16px rgba(209, 213, 219, 0.14);
}

.dc-guest-star-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.dc-guest-star-avatar span {
  font-family: var(--dc-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--dc-ink-2);
}

.dc-guest-star-name {
  font-family: var(--dc-serif);
  font-size: 14px;
  font-weight: 700;
  color: var(--dc-ink-0);
}

.dc-guest-star-time {
  display: block;
  margin-top: 2px;
  font-family: var(--dc-mono);
  font-size: 11px;
  color: var(--dc-ink-4);
}

.dc-guest-star-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--dc-ink-2);
}

.dc-guestbook-note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 26px;
  padding: 16px 20px;
  border: 1px dashed var(--dc-glass-border);
  border-radius: 12px;
  font-size: 13px;
  color: var(--dc-ink-4);
}

/* ============================================================
   ABOUT — 个人数字档案
   ============================================================ */
#page.type-about #article-container {
  font-size: 15px;
  line-height: 1.85;
}

#page.type-about h2 {
  margin-top: 36px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--dc-line);
  letter-spacing: 0.08em;
}

#page.type-about h3 {
  margin-top: 22px;
}

#page.type-about ul {
  padding-left: 22px;
}

#page.type-about li {
  margin: 7px 0;
}

#page.type-about blockquote {
  color: var(--dc-ink-2);
  border-left-color: var(--dc-ink-4) !important;
  background: rgba(13, 17, 23, 0.5) !important;
}

/* ============================================================
   响应式
   ============================================================ */
@media screen and (max-width: 1100px) {
  .dc-ai-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dc-friends-galaxy {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media screen and (max-width: 768px) {
  .dc-ai-grid,
  .dc-friends-galaxy,
  .dc-guestbook-stars {
    grid-template-columns: 1fr;
  }

  .dc-ai-card-body {
    padding: 16px 18px 18px;
  }

  .dc-ai-banner img {
    max-height: 260px;
  }

  .shuoshuo-item {
    padding: 16px 18px;
  }
}

/* ============================================================
   404 — DoubleC 深空（极少银色粒子）
   ============================================================ */
.dc-404 {
  position: relative;
  min-height: calc(100vh - 140px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--dc-glass-border);
  background: radial-gradient(ellipse at 50% 40%, #0D1117 0%, #080B10 55%, #050608 100%);
}

.dc-404-stars {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle 1.5px at 18% 22%, rgba(255, 255, 255, 0.5), transparent 100%),
    radial-gradient(circle 1px at 32% 68%, rgba(209, 213, 219, 0.35), transparent 100%),
    radial-gradient(circle 1.5px at 55% 30%, rgba(255, 255, 255, 0.4), transparent 100%),
    radial-gradient(circle 1px at 72% 75%, rgba(209, 213, 219, 0.3), transparent 100%),
    radial-gradient(circle 1.5px at 88% 18%, rgba(255, 255, 255, 0.35), transparent 100%),
    radial-gradient(circle 1px at 42% 85%, rgba(209, 213, 219, 0.25), transparent 100%),
    radial-gradient(circle 1px at 64% 52%, rgba(209, 213, 219, 0.22), transparent 100%);
  animation: dc404Twinkle 4.5s ease-in-out infinite;
}

@keyframes dc404Twinkle {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

.dc-404-body {
  position: relative;
  z-index: 1;
  padding: 0 24px;
}

.dc-404-code {
  margin: 0;
  font-family: var(--dc-serif);
  font-size: clamp(4rem, 14vw, 8.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.03em;
  color: #fff;
  text-shadow: 0 0 40px rgba(209, 213, 219, 0.25);
}

.dc-404-title {
  margin: 22px 0 0;
  font-family: var(--dc-serif);
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
  letter-spacing: 0.16em;
  color: var(--dc-ink-1);
}

.dc-404-sub {
  margin: 8px 0 0;
  font-family: var(--dc-serif);
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  letter-spacing: 0.16em;
  color: var(--dc-ink-3);
}

.dc-404-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 34px;
  padding: 12px 24px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--dc-ink-1);
  border: 1px solid var(--dc-glass-border);
  border-radius: 999px;
  background: rgba(209, 213, 219, 0.05);
  transition: all .3s ease;
}

.dc-404-btn:hover {
  color: #fff;
  border-color: rgba(174, 180, 188, 0.4);
  background: rgba(209, 213, 219, 0.1);
  box-shadow: 0 0 24px rgba(209, 213, 219, 0.15);
  gap: 14px;
}

@media (prefers-reduced-motion: reduce) {
  .dc-404-stars {
    animation: none;
  }
}