/* ══════════════════════════════════
   DESIGN TOKENS
══════════════════════════════════ */
:root {
  color-scheme: light;
  --bg: #fafcfd;
  --surface: #ffffff;
  --text: #103c4a;
  --muted: #526c77;
  --meta: #526c77;
  --border: #cfe0e5;
  --border-light: #e2eef2;
  --header-bg: rgba(250, 252, 253, .96);
  --header-text: #103c4a;
  --brand: #087b98;
  --accent: #087b98;
  --accent-hover: #06647c;
  --ice: #f0f9fc;
  --shadow: 0 1px 3px rgba(16, 60, 74, .06);
  --shadow-hover: 0 8px 30px rgba(16, 60, 74, .1);
  --radius: 6px;
  --font-body: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  --font-display: var(--font-body);
  --max-w: 1240px;
  --transition: .3s ease;
}

:root.dark {
  color-scheme: dark;
  --bg: #0d242d;
  --surface: #12333e;
  --text: #e8f4f7;
  --muted: #b2c8d0;
  --meta: #a3bec8;
  --border: #31545f;
  --border-light: #284954;
  --header-bg: rgba(13, 36, 45, .96);
  --header-text: #e8f4f7;
  --brand: #75ccdf;
  --accent: #75ccdf;
  --accent-hover: #a0e2ee;
  --ice: #163b48;
  --shadow: 0 1px 3px rgba(0, 0, 0, .2);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, .4);
}

/* ══════════════════════════════════
   RESET & BASE
══════════════════════════════════ */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.65 var(--font-body);
  min-height: 100vh;
  transition: background var(--transition), color var(--transition);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

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

/* ══════════════════════════════════
   HEADER
══════════════════════════════════ */
.header {
  background: var(--header-bg);
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
}

.header-inner {
  width: min(var(--max-w), calc(100% - 96px));
  min-height: 84px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}

.brand {
  position: relative;
  display: block;
  width: 116px;
  aspect-ratio: 830 / 425;
  overflow: hidden;
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
  opacity: 0.8;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.header-nav a {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition);
}

.header-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.btn-theme {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 18px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
}

.btn-theme:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ══════════════════════════════════
   CATEGORY TABS BAR
══════════════════════════════════ */
.tabs-bar {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  transition: background var(--transition);
}

.tabs-inner {
  width: min(var(--max-w), calc(100% - 96px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.tabs {
  display: flex;
  gap: 0;
  min-width: 0;
  overflow-x: auto;
}

.tab {
  background: none;
  border: none;
  padding: 18px 16px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  white-space: nowrap;
  transition: color var(--transition);
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--brand);
  font-weight: 500;
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--brand);
}

.tabs-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.search-wrap.expanded .search-input {
  width: 200px;
  padding: 6px 12px;
  border: 1px solid var(--border);
  opacity: 1;
}

.search-input {
  width: 0;
  padding: 0;
  border: none;
  opacity: 0;
  font-family: var(--font-body);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  border-radius: var(--radius);
  outline: none;
  transition: all 0.25s ease;
}

.btn-search {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 18px;
  cursor: pointer;
  padding: 8px;
  transition: color var(--transition);
}

.btn-search:hover {
  color: var(--text);
}

.btn-new {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  padding: 7px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-new:hover {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

/* ══════════════════════════════════
   MAIN CONTENT
══════════════════════════════════ */
.main {
  width: min(var(--max-w), calc(100% - 96px));
  margin: 0 auto;
}

/* ── Featured / Hero article ── */
.hero-card {
  padding: 48px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

.hero-card .hero-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.hero-card .hero-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--muted);
}

.hero-card .hero-author {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.hero-card .hero-date {
  font-size: 13px;
  color: var(--meta);
}

.hero-card .hero-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.035em;
  margin-bottom: 16px;
  max-width: 980px;
  color: var(--text);
}

.hero-card .hero-excerpt {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 24px;
  max-width: 760px;
}

.hero-card .hero-img {
  width: 100%;
  max-height: 540px;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  margin-top: 24px;
  border-radius: var(--radius);
  transition: transform .5s ease;
}

.hero-card:hover .hero-img {
  transform: scale(1.01);
}

.hero-card .hero-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.hero-card .hero-views {
  font-size: 12px;
  color: var(--meta);
}

.hero-card .hero-like {
  background: none;
  border: none;
  color: var(--meta);
  font-size: 18px;
  cursor: pointer;
  transition: color var(--transition);
}

.hero-card .hero-like:hover {
  color: var(--accent);
}

.hero-card .hero-like.liked {
  color: var(--accent);
}

.card-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.btn-edit-article {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  line-height: 1;
  padding: 6px 10px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-edit-article:hover {
  color: var(--text);
  border-color: var(--text);
}

/* ── Horizontal article cards ── */
.post-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition);
}

.post-card:last-child {
  border-bottom: none;
}

.post-thumb {
  overflow: hidden;
  border-radius: var(--radius);
}

.post-thumb img {
  width: 100%;
  height: 100%;
  min-height: 240px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.post-card:hover .post-thumb img {
  transform: scale(1.03);
}

.post-body {
  padding: 8px 0;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.post-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--muted);
}

.post-author {
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
}

.post-date {
  font-size: 12px;
  color: var(--meta);
}

.post-read-time {
  font-size: 12px;
  color: var(--meta);
}

.post-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.025em;
  margin-bottom: 12px;
  color: var(--text);
}

.post-excerpt {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  flex: 1;
}

.post-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-light);
}

.post-views {
  font-size: 12px;
  color: var(--meta);
}

.post-like {
  background: none;
  border: none;
  color: var(--meta);
  font-size: 16px;
  cursor: pointer;
  transition: color var(--transition);
}

.post-like:hover {
  color: var(--accent);
}

.post-like.liked {
  color: var(--accent);
}

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--meta);
  margin-bottom: 6px;
}

/* ── Article detail (expanded view) ── */
.article-detail {
  display: none;
  width: min(900px, calc(100% - 96px));
  margin: 48px auto;
  padding-bottom: 60px;
}

.article-detail.open {
  display: block;
}

.article-detail .detail-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 0;
  cursor: pointer;
  transition: color var(--transition);
  background: none;
  border: none;
  font-family: var(--font-body);
}

.article-detail .detail-back:hover {
  color: var(--text);
}

.article-detail .detail-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
}

.article-detail .detail-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
}

.article-detail .detail-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--muted);
}

.article-detail .detail-author {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.article-detail .detail-date {
  font-size: 13px;
  color: var(--meta);
}

.article-detail .detail-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -.035em;
  margin-bottom: 32px;
  color: var(--text);
}

.article-detail .detail-section {
  margin-bottom: 32px;
}

.article-detail .detail-subtitle {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -.025em;
  margin-bottom: 16px;
  color: var(--text);
}

.article-detail .detail-text {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.9;
  margin-bottom: 24px;
}

.article-detail .detail-section-visual {
  margin: 0 0 18px;
  padding: 16px 18px 18px;
  border: 1px solid var(--border-light);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.03));
}

.article-detail .detail-section-visual-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0 0 18px;
}

.article-detail .detail-section-visual-copy {
  flex: 1;
  min-width: 0;
}

.article-detail .detail-section-visual-label {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--meta);
}

.article-detail .detail-section-visual-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
}

.article-detail .detail-section-visual-text {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.article-detail .detail-section-visual-stage {
  width: 100%;
  height: 360px;
  border: 1px solid var(--border-light);
  background:
    radial-gradient(circle at top, rgba(8, 123, 152, .08), transparent 38%),
    linear-gradient(180deg, rgba(10, 10, 10, 0.02), rgba(10, 10, 10, 0.08));
  overflow: hidden;
  position: relative;
}

.article-detail .detail-img {
  width: 100%;
  border-radius: var(--radius);
  cursor: zoom-in;
  transition: transform .3s ease;
}

.article-detail .detail-img:hover {
  transform: scale(1.005);
}

.article-detail .detail-visual-card,
.article-detail .detail-reference-card {
  margin: 0 0 32px;
  padding: 22px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.02));
}

.article-detail .detail-visual-title,
.article-detail .detail-reference-title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.article-detail .detail-visual-text,
.article-detail .detail-reference-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.article-detail .detail-visual-text {
  margin-bottom: 14px;
}

.article-detail .detail-visual-actions {
  display: flex;
  justify-content: flex-end;
  margin: -2px 0 14px;
}

.article-detail .detail-visual-expand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1;
  padding: 10px 14px;
  cursor: pointer;
  transition: all var(--transition);
}

.article-detail .detail-visual-expand:hover {
  color: var(--text);
  border-color: var(--text);
}

.article-detail .detail-visual-stage {
  width: 100%;
  height: 340px;
  border: 1px solid var(--border-light);
  background:
    radial-gradient(circle at top, rgba(8, 123, 152, .08), transparent 38%),
    linear-gradient(180deg, rgba(10, 10, 10, 0.02), rgba(10, 10, 10, 0.08));
  overflow: hidden;
  position: relative;
}

.article-detail .detail-visual-stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.article-detail .detail-visual-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #0b1420;
}

.article-detail .detail-visual-status {
  position: absolute;
  inset: auto 16px 16px 16px;
  font-size: 12px;
  color: var(--meta);
  pointer-events: none;
}

.article-detail .detail-reference-list {
  list-style: none;
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.article-detail .detail-reference-link {
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
}

.article-detail .detail-reference-link:hover {
  text-decoration: underline;
}

/* ── Empty state ── */
.empty-state {
  display: none;
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
  font-size: 15px;
}

/* ══════════════════════════════════
   FOOTER
══════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  padding: 24px;
  text-align: center;
  font-size: 12px;
  color: var(--meta);
  margin-top: 40px;
  transition: border-color var(--transition);
}

/* ══════════════════════════════════
   LIGHTBOX
══════════════════════════════════ */
.lightbox {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.88);
  z-index: 60;
  padding: 20px;
  cursor: zoom-out;
}

.lightbox.open {
  display: flex;
}

.lightbox img {
  max-width: 92vw;
  max-height: 88vh;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox.lightbox--visual {
  cursor: default;
  padding: 24px;
  background: rgba(3, 7, 18, 0.94);
}

.visual-modal-shell {
  position: relative;
  width: min(96vw, 1320px);
  height: min(88vh, 860px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: #08111b;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.visual-modal-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: #08111b;
}

.visual-modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(8, 17, 27, 0.72);
  color: #f8fafc;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  z-index: 2;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.visual-modal-close:hover {
  background: rgba(8, 17, 27, 0.9);
  border-color: rgba(255, 255, 255, 0.38);
  transform: scale(1.03);
}

.visual-modal-caption {
  position: absolute;
  top: 16px;
  left: 16px;
  max-width: calc(100% - 92px);
  padding: 10px 14px;
  background: rgba(8, 17, 27, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #f8fafc;
  font-size: 13px;
  line-height: 1.5;
  z-index: 1;
  pointer-events: none;
}

/* ══════════════════════════════════
   MODAL
══════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: flex-start;
  justify-content: center;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  padding: 40px 20px;
  overflow-y: auto;
}

.modal-overlay.open {
  display: flex;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  width: 100%;
  max-width: 640px;
  padding: 32px;
  position: relative;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--transition);
}

.modal-close:hover {
  color: var(--text);
}

.modal h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--text);
}

.form-group {
  margin-bottom: 18px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--muted);
  margin-bottom: 6px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  font-family: var(--font-body);
  font-size: 14px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  transition: border-color var(--transition);
  outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--brand);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.form-select {
  cursor: pointer;
}

.section-block {
  border: 1px solid var(--border-light);
  padding: 20px;
  margin-bottom: 16px;
}

.section-block h4 {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--meta);
  margin-bottom: 14px;
}

.file-input-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.file-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  transition: all var(--transition);
}

.file-label:hover {
  border-color: var(--text);
  color: var(--text);
}

.file-label input {
  display: none;
}

.file-name {
  font-size: 12px;
  color: var(--meta);
}

.preview-thumb {
  display: none;
  width: 60px;
  height: 60px;
  object-fit: cover;
  border: 1px solid var(--border);
}

.preview-thumb.show {
  display: block;
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  justify-content: flex-end;
}

.btn-publish {
  background: var(--accent);
  color: var(--surface);
  border: 1px solid var(--accent);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 28px;
  cursor: pointer;
  text-transform: none;
  transition: all var(--transition);
}

.btn-publish:hover {
  opacity: 0.85;
}

.btn-cancel {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 10px 20px;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-cancel:hover {
  border-color: var(--text);
  color: var(--text);
}

/* ══════════════════════════════════
   TOAST
══════════════════════════════════ */
#toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--header-bg);
  color: var(--header-text);
  padding: 12px 28px;
  font-size: 13px;
  z-index: 100;
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

#toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ══════════════════════════════════
   LOGIN
══════════════════════════════════ */
.btn-login {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--surface);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  min-height: 48px;
  padding: 11px 23px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-login:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 10px 16px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-logout:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 55;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
}

.login-overlay.open {
  display: flex;
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  width: 100%;
  max-width: 380px;
  padding: 36px 32px;
  animation: slideUp 0.3s ease;
}

.login-box h2 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.login-box .login-sub {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 24px;
}

.login-box .login-error {
  display: none;
  font-size: 12px;
  color: var(--accent);
  margin-bottom: 12px;
}

.login-box .login-error.show {
  display: block;
}

.login-box .form-group {
  margin-bottom: 16px;
}

.login-box .login-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.login-box .btn-signin {
  flex: 1;
  background: var(--accent);
  color: var(--surface);
  border: 1px solid var(--accent);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  padding: 10px 20px;
  cursor: pointer;
  text-transform: none;
  transition: all var(--transition);
}

.login-box .btn-signin:hover {
  opacity: 0.85;
}

.login-box .login-close {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 10px 16px;
  cursor: pointer;
  transition: all var(--transition);
}

.login-box .login-close:hover {
  border-color: var(--text);
  color: var(--text);
}

.btn-new.hidden {
  display: none;
}

.user-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.user-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #2ecc71;
}

/* ══════════════════════════════════
   RESPONSIVE
══════════════════════════════════ */
@media (max-width: 700px) {
  .header-inner {
    min-height: 76px;
    padding: 16px 0;
    flex-wrap: wrap;
    row-gap: 8px;
    column-gap: 12px;
  }

  .header-nav {
    display: contents;
  }

  .header-links { order: 1; width: 100%; gap: 18px; }
  .btn-theme { margin-left: auto; }

  .post-card {
    grid-template-columns: 1fr;
  }

  .post-body {
    padding: 16px 0 0;
  }

  .hero-card .hero-title {
    font-size: 30px;
  }

  .post-title {
    font-size: 24px;
  }

  .article-detail .detail-title {
    font-size: 26px;
  }

  .article-detail .detail-visual-card,
  .article-detail .detail-reference-card {
    padding: 18px;
  }

  .article-detail .detail-visual-stage {
    height: 260px;
  }

  .article-detail .detail-section-visual {
    padding: 14px;
  }

  .article-detail .detail-section-visual-head {
    flex-direction: column;
    align-items: stretch;
    margin-bottom: 14px;
  }

  .article-detail .detail-section-visual-stage {
    height: 280px;
  }

  .article-detail .detail-visual-actions {
    margin-bottom: 12px;
  }

  .article-detail .detail-visual-expand {
    width: 100%;
  }

  .lightbox.lightbox--visual {
    padding: 12px;
  }

  .visual-modal-shell {
    width: 100%;
    height: min(84vh, 720px);
  }

  .visual-modal-caption {
    max-width: calc(100% - 84px);
    font-size: 12px;
    padding: 8px 12px;
  }

  .tabs-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .tabs {
    overflow-x: auto;
  }

  .tab {
    padding: 14px 14px;
    font-size: 13px;
  }

  .tabs-actions {
    justify-content: space-between;
    padding-bottom: 10px;
  }

  .search-wrap.expanded .search-input {
    width: 150px;
  }
}

/* Branding and reading layout reuse the active home page palette and spacing. */
[hidden] { display: none !important; }
button, input, select, textarea { font-family: var(--font-body); }
::selection { background: #c7e6ed; color: #103c4a; }
.brand img { position: absolute; width: 100%; height: auto; left: 0; top: 50%; transform: translateY(-65.466667%); }
.dark .brand { background: #fafcfd; border-radius: var(--radius); }
.header-nav a[aria-current="page"] { color: var(--accent); }
.header-links { display: flex; align-items: center; gap: 30px; }
.blog-intro { width: min(var(--max-w), calc(100% - 96px)); margin: 48px auto 32px; }
.blog-intro h1 { font-size: clamp(32px, 4vw, 48px); line-height: 1.15; letter-spacing: -.035em; }
.blog-intro p { margin-top: 16px; max-width: 760px; color: var(--muted); }
.tag { color: var(--accent); }
.hero-card .hero-avatar, .post-avatar, .article-detail .detail-avatar { background: var(--ice); color: var(--accent); border-radius: var(--radius); }
.modal, .login-box, .btn-edit-article, .btn-publish, .btn-cancel, .btn-signin, .login-close, .detail-visual-expand { border-radius: var(--radius); }
.modal-overlay, .login-overlay { padding: 20px; }
.modal { max-height: calc(100dvh - 40px); overflow-y: auto; }
.article-detail .detail-visual-card, .article-detail .detail-reference-card, .article-detail .detail-section-visual { background: var(--ice); border-radius: var(--radius); }
.article-detail .detail-reference-link { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; overflow-wrap: anywhere; }
#toast { background: var(--accent); color: var(--surface); border-radius: var(--radius); max-width: calc(100% - 40px); }

@media (max-width: 1100px) {
  .header-inner, .tabs-inner, .main, .blog-intro { width: calc(100% - 64px); }
  .tabs-inner { flex-direction: column; align-items: stretch; gap: 0; }
  .tabs-actions { justify-content: flex-end; padding-bottom: 12px; }
  .header-nav { gap: 20px; }
  .header-links { gap: 20px; }
}
@media (max-width: 540px) {
  .header-inner, .tabs-inner, .main, .blog-intro, .article-detail { width: calc(100% - 40px); }
  .brand { width: 88px; }
  .blog-intro { margin: 32px auto 24px; }
  .hero-card { padding: 32px 0; }
  .hero-card .hero-img { aspect-ratio: 16 / 10; }
  .post-card { gap: 16px; padding: 32px 0; }
  .post-thumb img { min-height: 0; aspect-ratio: 16 / 10; }
  .article-detail { margin: 32px auto; }
  .article-detail .detail-title { font-size: 32px; }
  .modal { padding: 24px 20px; }
  .login-box { padding: 28px 20px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}