:root {
  color-scheme: light;
  --bg: #f4f0e8;
  --surface: #fffdf8;
  --surface-strong: #ffffff;
  --text: #191817;
  --muted: #68625a;
  --line: #ddd5ca;
  --line-strong: #bdb2a3;
  --accent: #b42318;
  --accent-strong: #7a1c15;
  --green: #1f6f4a;
  --blue: #285f8f;
  --gold: #9a6b1e;
  --shadow: 0 18px 50px rgba(41, 33, 24, 0.12);
  --radius: 8px;
  --font: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", Arial, sans-serif;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #161514;
  --surface: #22201d;
  --surface-strong: #2b2926;
  --text: #f4eee5;
  --muted: #bbb1a6;
  --line: #3c3833;
  --line-strong: #595249;
  --accent: #e64b3d;
  --accent-strong: #ff7568;
  --green: #61b783;
  --blue: #78a9d7;
  --gold: #d8a94b;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  letter-spacing: 0;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(220px, 1fr) auto auto;
  gap: 18px;
  align-items: center;
  padding: 14px clamp(16px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.brand-avatar {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  object-fit: cover;
}

.brand span {
  display: grid;
  min-width: 0;
  gap: 2px;
}

.brand strong {
  overflow: hidden;
  color: var(--text);
  font-size: 17px;
  line-height: 1.15;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand small {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 14px;
}

.primary-nav a {
  min-height: 36px;
  padding: 9px 12px;
  border-radius: var(--radius);
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  background: var(--surface-strong);
  color: var(--text);
  outline: none;
}

.topbar-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.topbar-secondary {
  background: transparent;
}

.icon-button,
.primary-button,
.secondary-button {
  min-height: 38px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
}

.icon-button {
  width: 38px;
  background: var(--surface-strong);
  border-color: var(--line);
  color: var(--text);
}

.primary-button {
  padding: 0 16px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--accent-strong);
}

.secondary-button {
  padding: 0 15px;
  background: var(--surface-strong);
  border-color: var(--line);
  color: var(--text);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(180px, 250px) minmax(0, 1fr) minmax(240px, 320px);
  gap: 18px;
  align-items: start;
  width: min(1480px, 100%);
  margin: 0 auto;
  padding: 22px clamp(16px, 3vw, 34px) 44px;
}

.left-rail,
.right-rail {
  display: grid;
  gap: 14px;
  position: sticky;
  top: 84px;
}

.panel,
.board-surface {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel {
  padding: 16px;
}

.compact-panel {
  box-shadow: none;
}

.panel h2,
.board-header h1,
.dialog-title-row h2 {
  margin: 0;
}

.panel h2 {
  font-size: 16px;
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.panel-heading a {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.category-list,
.board-filter-bar {
  display: grid;
  gap: 8px;
}

.category-button,
.filter-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--muted);
  cursor: pointer;
  text-align: left;
}

.category-button {
  padding: 0 11px;
}

.filter-button {
  padding: 0 13px;
  white-space: nowrap;
}

.category-button.is-active,
.filter-button.is-active {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: color-mix(in srgb, var(--accent) 12%, var(--surface-strong));
  color: var(--accent-strong);
  font-weight: 700;
}

.category-button span:last-child {
  color: var(--muted);
  font-size: 12px;
}

.rule-list {
  display: grid;
  gap: 10px;
  margin: 12px 0 0;
  padding: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
  list-style: none;
}

.rule-list li {
  padding-left: 12px;
  border-left: 3px solid var(--line-strong);
}

.metric-stack {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
}

.metric-stack div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.metric-stack div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.metric-stack dt {
  color: var(--muted);
  font-size: 13px;
}

.metric-stack dd {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
}

.board-surface {
  overflow: hidden;
}

.board-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
  gap: 18px;
  align-items: end;
  padding: 24px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.board-header h1 {
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.16;
}

.board-summary {
  max-width: 620px;
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.board-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 130px;
  gap: 10px;
}

.search-box,
.select-box,
.compose-form label,
.signup-form label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.search-box input,
.select-box select,
.compose-form input,
.compose-form select,
.compose-form textarea,
.signup-form input,
.signup-form select,
.signup-form textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--text);
  outline: none;
}

.search-box input,
.compose-form input,
.signup-form input {
  padding: 0 13px;
}

.select-box select,
.compose-form select,
.signup-form select {
  padding: 0 10px;
}

.compose-form textarea,
.signup-form textarea {
  min-height: 132px;
  padding: 12px 13px;
  resize: vertical;
}

.search-box input:focus,
.select-box select:focus,
.compose-form input:focus,
.compose-form select:focus,
.compose-form textarea:focus,
.signup-form input:focus,
.signup-form select:focus,
.signup-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}

.featured-thread {
  display: grid;
  grid-template-columns: minmax(180px, 250px) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin: 18px 24px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
}

.featured-thread img {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  object-fit: cover;
}

.featured-thread h2 {
  margin: 8px 0 8px;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.28;
}

.featured-thread p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.status-pill,
.tag,
.thread-category {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.status-pill {
  padding: 0 10px;
  background: color-mix(in srgb, var(--green) 14%, var(--surface));
  color: var(--green);
}

.board-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
}

.board-stats div {
  display: grid;
  gap: 3px;
  padding: 16px 24px;
  border-right: 1px solid var(--line);
}

.board-stats div:last-child {
  border-right: 0;
}

.board-stats strong {
  font-size: 24px;
}

.board-stats span {
  color: var(--muted);
  font-size: 13px;
}

.board-filter-bar {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
}

.answer-hub {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.25fr);
  gap: 20px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--surface-strong) 74%, var(--surface));
}

.member-hub {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(220px, 0.95fr);
  gap: 18px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.member-intro {
  display: grid;
  align-content: start;
  justify-items: start;
}

.member-intro h2 {
  margin: 0;
  font-size: clamp(21px, 2.4vw, 28px);
  line-height: 1.25;
}

.member-intro p {
  margin: 10px 0 16px;
  color: var(--muted);
  line-height: 1.65;
}

.member-benefits {
  display: grid;
  gap: 10px;
}

.member-benefits article,
.member-status {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
}

.member-benefits article {
  display: grid;
  gap: 6px;
  padding: 13px;
}

.member-benefits strong,
.member-status strong {
  font-size: 14px;
}

.member-benefits span,
.member-status span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.member-status {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  align-items: center;
  justify-content: space-between;
  padding: 12px 13px;
}

.member-status.is-success {
  border-color: color-mix(in srgb, var(--green) 40%, var(--line));
  background: color-mix(in srgb, var(--green) 10%, var(--surface-strong));
}

.member-status.is-error {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line));
  background: color-mix(in srgb, var(--accent) 10%, var(--surface-strong));
}

.answer-hub h2 {
  margin: 0;
  font-size: clamp(20px, 2.2vw, 26px);
  line-height: 1.25;
}

.answer-hub p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

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

.answer-item {
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.answer-item h3 {
  margin: 0;
  font-size: 14px;
}

.answer-item p {
  margin-top: 8px;
  font-size: 13px;
}

.thread-table-head,
.thread-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 86px 80px 112px;
  gap: 12px;
  align-items: center;
}

.thread-table-head {
  padding: 0 24px 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.thread-table-head span:not(:first-child) {
  text-align: center;
}

.thread-list {
  display: grid;
}

.thread-row {
  width: 100%;
  padding: 16px 24px;
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.thread-row:hover,
.thread-row:focus-visible {
  background: color-mix(in srgb, var(--accent) 5%, var(--surface));
  outline: none;
}

.thread-main {
  min-width: 0;
}

.thread-kicker {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  margin-bottom: 8px;
}

.thread-category {
  padding: 0 9px;
  background: color-mix(in srgb, var(--blue) 12%, var(--surface-strong));
  color: var(--blue);
}

.thread-category.notice {
  background: color-mix(in srgb, var(--gold) 14%, var(--surface-strong));
  color: var(--gold);
}

.thread-title {
  display: block;
  overflow: hidden;
  font-size: 17px;
  font-weight: 800;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.thread-excerpt {
  display: -webkit-box;
  overflow: hidden;
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.thread-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
}

.tag {
  padding: 0 8px;
  background: color-mix(in srgb, var(--line-strong) 24%, transparent);
  color: var(--muted);
}

.metric-cell,
.date-cell {
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.metric-cell strong {
  display: block;
  color: var(--text);
  font-size: 18px;
}

.empty-state {
  padding: 42px 24px;
  color: var(--muted);
  text-align: center;
}

.noscript-board {
  padding: 18px 24px;
  border-top: 1px solid var(--line);
}

.noscript-board h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

.noscript-board ul {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.7;
}

.video-list {
  display: grid;
  gap: 12px;
}

.video-item {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}

.video-item img {
  width: 92px;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  object-fit: cover;
}

.video-item strong {
  display: -webkit-box;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.35;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.video-item span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
}

.ranking-list {
  display: grid;
  gap: 12px;
  margin: 14px 0 0;
  padding-left: 20px;
}

.ranking-list li {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.ranking-list strong {
  display: block;
  color: var(--text);
}

.task-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.task-list label {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.thread-dialog,
.compose-dialog,
.signup-dialog {
  width: min(720px, calc(100vw - 28px));
  max-height: calc(100vh - 34px);
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}

.thread-dialog::backdrop,
.compose-dialog::backdrop,
.signup-dialog::backdrop {
  background: rgba(0, 0, 0, 0.48);
}

.close-button {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--text);
  cursor: pointer;
  font-size: 22px;
  line-height: 1;
}

.detail-body {
  padding: 28px;
}

.detail-body h2 {
  margin: 10px 46px 12px 0;
  font-size: clamp(22px, 4vw, 30px);
  line-height: 1.25;
}

.detail-body p {
  color: var(--muted);
  line-height: 1.75;
}

.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 18px;
  color: var(--muted);
  font-size: 13px;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.comment-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.comment {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
}

.comment strong {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
}

.comment p {
  margin: 0;
  font-size: 14px;
}

.compose-form,
.signup-form {
  display: grid;
  gap: 16px;
  padding: 26px;
}

.signup-form .checkbox-line {
  display: flex;
  grid-template-columns: none;
  gap: 10px;
  align-items: flex-start;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

.signup-form .checkbox-line input {
  width: 18px;
  min-height: 18px;
  margin-top: 2px;
}

.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.form-message {
  min-height: 20px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.form-message.is-success {
  color: var(--green);
  font-weight: 700;
}

.form-message.is-error {
  color: var(--accent);
  font-weight: 700;
}

.dialog-title-row {
  position: relative;
  padding-right: 44px;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  justify-content: center;
  padding: 22px clamp(16px, 3vw, 34px) 34px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer strong {
  color: var(--text);
}

.footer-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-links a {
  color: var(--accent);
  font-weight: 700;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .right-rail {
    grid-column: 2;
    position: static;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 1320px) {
  .board-header {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .board-actions {
    grid-template-columns: minmax(0, 1fr) 130px;
  }
}

@media (max-width: 880px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .primary-nav {
    grid-column: 1 / -1;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .workspace {
    grid-template-columns: minmax(0, 1fr);
  }

  .left-rail,
  .right-rail {
    position: static;
    grid-column: auto;
  }

  .left-rail {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .right-rail {
    grid-template-columns: 1fr;
  }

  .board-header {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .answer-hub {
    grid-template-columns: 1fr;
  }

  .member-hub {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .topbar {
    padding-inline: 12px;
  }

  .brand strong {
    font-size: 15px;
  }

  .workspace {
    padding: 14px 12px 34px;
  }

  .left-rail {
    grid-template-columns: 1fr;
  }

  .board-header,
  .featured-thread,
  .member-hub,
  .answer-hub,
  .board-filter-bar,
  .thread-table-head,
  .thread-row {
    padding-inline: 16px;
  }

  .answer-grid {
    grid-template-columns: 1fr;
  }

  .board-actions {
    grid-template-columns: 1fr;
  }

  .featured-thread {
    grid-template-columns: 1fr;
    margin-inline: 16px;
  }

  .board-stats {
    grid-template-columns: 1fr;
  }

  .board-stats div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .board-stats div:last-child {
    border-bottom: 0;
  }

  .board-filter-bar {
    display: flex;
    overflow-x: auto;
  }

  .filter-button {
    min-width: max-content;
  }

  .thread-table-head {
    display: none;
  }

  .thread-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 10px;
  }

  .thread-title {
    white-space: normal;
  }

  .metric-cell,
  .date-cell {
    display: inline-flex;
    justify-content: flex-start;
    gap: 6px;
    text-align: left;
  }

  .metric-cell strong {
    display: inline;
    font-size: 13px;
  }

  .detail-body,
  .compose-form,
  .signup-form {
    padding: 22px 18px;
  }

  .member-status {
    align-items: flex-start;
    justify-content: flex-start;
  }
}