*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #1e5a8a;
  --color-primary-dark: #164770;
  --color-accent: #e8a838;
  --color-bg: #f4f7fb;
  --color-surface: #ffffff;
  --color-text: #1a2332;
  --color-text-muted: #5c6b7a;
  --color-border: #dde4ec;
  --shadow-sm: 0 1px 3px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 35, 50, 0.1);
  --radius: 12px;
  --header-h: 64px;
  --manual-scroll-offset: calc(var(--header-h) + 0.75rem);
  --font: "Noto Sans KR", -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  min-height: 100dvh;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 1.5rem;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.logo-img {
  display: block;
  height: 48px;
  width: auto;
  max-width: 48px;
  object-fit: contain;
  flex-shrink: 0;
  background: transparent;
}

.logo-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  letter-spacing: -0.03em;
  line-height: 1.2;
  white-space: nowrap;
}

.logo-em {
  font-size: 1.3125rem;
  font-weight: 700;
  color: var(--color-primary-dark);
}

.logo-sub {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.btn-ghost {
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover {
  background: #eef4fa;
  border-color: var(--color-primary);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  color: var(--color-text-muted);
  border-radius: 8px;
}

.btn-icon:hover {
  background: #eef4fa;
  color: var(--color-primary);
}

.btn-primary {
  color: #fff;
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn--ghost {
  color: var(--color-primary);
  border: 1px solid var(--color-border);
  background: transparent;
}

.btn--ghost:hover {
  background: var(--color-bg);
  border-color: var(--color-primary);
}

.btn--danger {
  color: #b42318;
  border: 1px solid #fecdca;
  background: #fff5f5;
}

.btn--danger:hover {
  background: #fee4e2;
  border-color: #f97066;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

[data-theme="dark"] .btn-ghost:hover,
[data-theme="dark"] .btn-icon:hover {
  background: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .btn--ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

[data-theme="dark"] .btn--danger {
  color: #fda29b;
  border-color: #7a271a;
  background: rgba(180, 35, 24, 0.15);
}

[data-theme="dark"] .btn--danger:hover {
  background: rgba(180, 35, 24, 0.28);
}

/* Main */
.main {
  flex: 1;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem 3rem;
}

.view-top-bar[hidden] {
  display: none !important;
}

.view-top-bar {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.view-back {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  height: auto;
  padding: 0.125rem;
  border: none;
  border-radius: 0;
  color: var(--color-primary);
  background: transparent;
  box-shadow: none;
  cursor: pointer;
  font-family: inherit;
  line-height: 1;
  transition: opacity 0.15s;
}

.view-back:hover {
  opacity: 0.75;
}

.view-top-bar__title {
  flex: 1;
  min-width: 0;
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.main--manual {
  max-width: 1200px;
  padding-top: 1rem;
  padding-bottom: 1.5rem;
}

.view[hidden] {
  display: none !important;
}

/* Manual */
.manual-panel {
  display: flex;
  flex-direction: column;
}

.manual-panel > .manual-list-wrap,
.manual-panel > .manual-detail-view {
  display: flex;
  flex-direction: column;
}

.manual-list-wrap[hidden] {
  display: none !important;
}

.manual-search-wrap {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-bottom: 0.75rem;
}

.manual-columns-wrap[hidden] {
  display: none !important;
}

.manual-columns-wrap {
  padding-bottom: 0.5rem;
}

.manual-columns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  align-items: start;
}

.manual-search-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0 1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.manual-search-icon {
  flex-shrink: 0;
  color: var(--color-text-muted);
}

.manual-search-input {
  flex: 1;
  min-width: 0;
  padding: 0.9rem 0;
  font-family: inherit;
  font-size: 1rem;
  border: none;
  background: transparent;
  outline: none;
}

.manual-search-input::placeholder {
  color: #a8b4c0;
}

.manual-search-results[hidden] {
  display: none !important;
}

.manual-search-results {
  padding-bottom: 1rem;
}

.manual-search-results-count {
  margin-bottom: 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.manual-search-results-empty {
  padding: 1.5rem 1rem;
  text-align: center;
}

.manual-search-results-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.manual-search-result {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.25rem;
  width: 100%;
  padding: 0.875rem 1rem;
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.manual-search-result:hover {
  background: #f8fbff;
  border-color: #c5d9eb;
  box-shadow: var(--shadow-sm);
}

.manual-search-result-meta {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.manual-search-result-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.manual-search-result-snippet {
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.manual-search-mark {
  padding: 0 0.1em;
  background: #fff3bf;
  color: inherit;
  border-radius: 2px;
}

.manual-column {
  display: flex;
  flex-direction: column;
  min-height: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.manual-column-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #eef4fa;
  border-bottom: 1px solid var(--color-border);
}

.manual-column-title {
  padding: 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  background: transparent;
  border-bottom: none;
}

.manual-column-heading .manual-column-title {
  flex: 1;
  min-width: 0;
}

.manual-column-download {
  flex-shrink: 0;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-primary);
  white-space: nowrap;
}

.manual-column-download:hover {
  text-decoration: underline;
}

.manual-column > .manual-column-title {
  padding: 0.75rem 1rem;
  background: #eef4fa;
  border-bottom: 1px solid var(--color-border);
}

.manual-column-list {
  list-style: none;
  flex: 1;
  padding: 0.5rem;
}

.manual-item {
  display: block;
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: left;
  color: var(--color-text);
  border-radius: 8px;
  transition: background 0.15s;
}

.manual-item:hover {
  background: #f0f6fc;
  color: var(--color-primary);
}

.manual-empty {
  padding: 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.manual-detail-view {
  display: flex;
  flex-direction: column;
}

.manual-detail-view[hidden] {
  display: none !important;
}

.manual-list-wrap[hidden] {
  display: none !important;
}

.manual-detail-header {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.manual-back {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.manual-back__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-primary);
}

.manual-detail-title {
  flex: 1;
  min-width: 0;
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.manual-detail-body {
  display: block;
}

.manual-detail-body p {
  margin-bottom: 0.75rem;
}

.manual-detail-body h1,
.manual-detail-body h2,
.manual-detail-body h3 {
  margin: 1rem 0 0.5rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.manual-detail-body ul,
.manual-detail-body ol {
  margin: 0.5rem 0 0.75rem 1.25rem;
}

.manual-detail-loading,
.manual-detail-fallback {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.manual-detail-fallback a {
  color: var(--color-primary);
}

.manual-sectioned {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: 1rem;
}

.manual-section-nav {
  padding: 0.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.manual-section-nav-label {
  margin-bottom: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.manual-section-list {
  list-style: none;
}

.manual-section-item {
  display: block;
  width: 100%;
  padding: 0.5rem 0.6rem;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  text-align: left;
  color: var(--color-text);
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}

.manual-section-item:hover {
  background: #f0f6fc;
  color: var(--color-primary);
}

.manual-section-item.is-active {
  background: #eef4fa;
  color: var(--color-primary-dark);
  font-weight: 600;
}

.manual-section-content {
  padding: 1rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.manual-section-content p {
  margin-bottom: 0.75rem;
}

.manual-section-content ul,
.manual-section-content ol {
  margin: 0.5rem 0 0.75rem 1.25rem;
}

.manual-section-content h1,
.manual-section-content h2,
.manual-section-content h3 {
  margin: 1rem 0 0.5rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.manual-section-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.manual-section-content a:hover {
  color: var(--color-primary-dark);
}

.manual-section-content a.manual-internal-link {
  color: var(--color-primary);
  font-weight: 500;
}

.manual-section-content .manual-link-arrival {
  position: relative;
  margin: 0.5rem 0 0.75rem;
  padding: 0.75rem 0.875rem 0.75rem 0.875rem;
  background: #fff8e6;
  border-left: 3px solid #e6a817;
  border-radius: 0 var(--radius) var(--radius) 0;
  scroll-margin-top: var(--manual-scroll-offset);
}

.manual-link-back-wrap {
  margin-bottom: 0.625rem;
}

.manual-link-back {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.65rem;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-primary-dark);
  background: #fff;
  border: 1px solid #e6c875;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.manual-link-back:hover {
  background: #fffdf5;
  border-color: #d4a017;
}

.manual-internal-link--return {
  background: #e8f4fd;
  outline: 2px solid #5ba4d9;
  outline-offset: 2px;
  border-radius: 2px;
  scroll-margin-top: var(--manual-scroll-offset);
}

.manual-bookmark {
  display: block;
  height: 0;
  overflow: hidden;
  scroll-margin-top: var(--manual-scroll-offset);
}

@media (max-width: 768px) {
  .manual-sectioned {
    grid-template-columns: 1fr;
  }
}

/* Chatbot */
.chatbot {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 300;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
  pointer-events: none;
}

.chatbot-fab,
.chatbot-panel {
  pointer-events: auto;
}

.chatbot-fab {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  padding: 8px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #dce8f2;
  box-shadow: var(--shadow-lg);
  transition: transform 0.2s, border-color 0.2s;
  overflow: visible;
}

.chatbot-fab__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

.chatbot-fab:hover {
  transform: scale(1.05);
  border-color: var(--color-primary);
}

.chatbot-panel {
  display: flex;
  flex-direction: column;
  width: min(360px, calc(100vw - 2.5rem));
  height: 420px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.chatbot-panel[hidden] {
  display: none !important;
}

.chatbot-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: #eef4fa;
  border-bottom: 1px solid var(--color-border);
}

.chatbot-header__avatar {
  flex-shrink: 0;
  display: block;
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.chatbot-title {
  flex: 1;
  min-width: 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary-dark);
}

.chatbot-close {
  width: 32px;
  height: 32px;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--color-text-muted);
  border-radius: 6px;
}

.chatbot-close:hover {
  background: #dce8f2;
}

.chatbot-messages {
  flex: 1;
  min-height: 0;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chatbot-msg {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  max-width: 92%;
}

.chatbot-msg__avatar {
  flex-shrink: 0;
  display: block;
  width: 28px;
  height: 28px;
  margin-top: 0.1rem;
  object-fit: contain;
}

.chatbot-msg__text {
  padding: 0.6rem 0.85rem;
  font-size: 0.8125rem;
  line-height: 1.45;
  border-radius: 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

.chatbot-msg--bot {
  align-self: flex-start;
}

.chatbot-msg--bot .chatbot-msg__text {
  background: #eef4fa;
  color: var(--color-text);
}

.chatbot-msg--user {
  align-self: flex-end;
  flex-direction: row-reverse;
}

.chatbot-msg--user .chatbot-msg__text {
  background: var(--color-primary);
  color: #fff;
}

.chatbot-msg--typing .chatbot-msg__text {
  color: var(--color-text-muted);
}

.chatbot-form {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  border-top: 1px solid var(--color-border);
}

.chatbot-input {
  flex: 1;
  min-width: 0;
  padding: 0.55rem 0.75rem;
  font-family: inherit;
  font-size: 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  outline: none;
}

.chatbot-input:focus {
  border-color: var(--color-primary);
}

.chatbot-send {
  padding: 0.55rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: #fff;
  background: var(--color-primary);
  border-radius: 8px;
}

.chatbot-send:hover {
  background: var(--color-primary-dark);
}

.hero {
  margin-bottom: 2rem;
  text-align: center;
}

.hero-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

.hero-desc {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: var(--color-text-muted);
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.category-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.category-card:not(.category-card--soon):hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.category-card--soon {
  opacity: 0.92;
  cursor: default;
}

.category-card--soon:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.category-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, #e8f2fa, #d4e8f7);
  color: var(--color-primary);
}

.category-icon svg {
  width: 24px;
  height: 24px;
}

.category-label {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.category-desc {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.category-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.2rem 0.5rem;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-primary);
  background: #eef4fa;
  border-radius: 4px;
}

/* Footer */
.footer {
  --footer-size: 0.6875rem;
  margin-top: auto;
  padding: 0.5rem 1.5rem 0.4rem;
  background: var(--color-surface);
  border-top: 1px solid #e8edf2;
  font-size: var(--footer-size);
  line-height: 1.4;
}

.footer-inner,
.footer-copy {
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.footer-line,
.footer-copy,
.footer-address-row,
.footer-label,
.footer-branch,
.footer-value,
.footer-sep,
.footer-inner a {
  font-size: var(--footer-size);
  line-height: 1.4;
}

.footer-line {
  margin: 0;
  color: #9aa5b0;
}

.footer-line + .footer-line,
.footer-address-block {
  margin-top: 0.2rem;
}

.footer-address-block .footer-line {
  margin: 0 0 0.1rem;
}

.footer-address-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  column-gap: 0.35rem;
  margin: 0.08rem 0 0;
  padding: 0;
}

.footer-address-row .footer-branch {
  flex-shrink: 0;
}

.footer-address-row .footer-value {
  flex: 1 1 auto;
  min-width: 0;
}

.footer-label {
  font-weight: 500;
  color: #b0bac4;
}

.footer-branch {
  font-weight: 500;
  color: #a8b4c0;
}

.footer-value {
  font-weight: 400;
  color: #9aa5b0;
}

.footer-sep {
  margin: 0 0.35rem;
  font-weight: 400;
  color: #d5dbe1;
}

.footer-value[href^="tel:"]:hover {
  color: #7d8b98;
  text-decoration: underline;
}

.footer-copy {
  margin-top: 0.25rem;
  font-weight: 400;
  color: #c2cad2;
}

@media (min-width: 640px) {
  .hero {
    text-align: left;
  }
}

@media (min-width: 769px) {
  .hero-title {
    font-size: 2rem;
  }

  .category-grid {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
  }

  .auth-form__actions {
    flex-direction: row;
  }

  .auth-form__actions .btn {
    width: auto;
    flex: 1;
  }
}

#dev-live-badge {
  position: fixed;
  bottom: 12px;
  left: 12px;
  z-index: 9999;
  padding: 0.35rem 0.6rem;
  font-size: 0.6875rem;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 6px;
  box-shadow: var(--shadow-md);
  opacity: 0.85;
  pointer-events: none;
}

@media (max-width: 900px) {
  .manual-columns {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .logo-text {
    font-size: 0.9375rem;
  }

  .logo-em {
    font-size: 1.125rem;
  }

  .logo-sub {
    font-size: 0.6875rem;
  }

  .logo-img {
    height: 40px;
    max-width: 40px;
  }

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

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

  .manual-search-wrap {
    flex-basis: auto;
    min-height: 5rem;
    max-height: none;
  }

  .chatbot {
    right: 0.75rem;
    bottom: 0.75rem;
  }

  .main {
    padding: 0.75rem 1rem 2rem;
  }

  .panel-view {
    padding: 1.25rem;
  }

  .panel-view--narrow {
    max-width: none;
  }

  .auth-form__actions {
    flex-direction: column;
  }

  .auth-form__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* Theme: dark mode */
[data-theme="dark"] {
  --color-primary: #6eb3e8;
  --color-primary-dark: #4a9ad4;
  --color-accent: #e8a838;
  --color-bg: #0f1419;
  --color-surface: #1a2332;
  --color-text: #e8edf2;
  --color-text-muted: #9aa8b8;
  --color-border: #2a3544;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
}

[data-theme="dark"] .logo-em {
  color: var(--color-primary);
}

[data-theme="dark"] .logo-sub {
  color: var(--color-text-muted);
}

[data-theme="dark"] .logo-text {
  color: var(--color-text);
}

[data-theme="dark"] .category-badge {
  background: rgba(110, 179, 232, 0.15);
}

/* Panel views (settings, login, members, about) */
.main--panel {
  max-width: 720px;
}

.main--panel-wide {
  max-width: 960px;
}

.panel-view {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 2rem;
}

.panel-view--narrow {
  max-width: 420px;
  margin: 0 auto;
}

.panel-view--wide {
  max-width: 960px;
  margin: 0 auto;
}

.panel-view__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.panel-view__desc {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  margin: 0 0 1.25rem;
}

.settings-group + .settings-group {
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-border);
}

.settings-group__title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.875rem;
}

.settings-options {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.settings-option {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
}

.settings-option:has(input:checked) {
  border-color: var(--color-primary);
  background: rgba(30, 90, 138, 0.06);
}

.settings-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0;
}

.auth-form--secondary {
  display: none;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.auth-form--secondary.is-open {
  display: flex;
}

#password-change-form[hidden] {
  display: none !important;
}

#password-change-toggle.is-active {
  border-color: var(--color-primary);
  background: rgba(30, 90, 138, 0.08);
}

.auth-form__checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.auth-form__field {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.auth-form__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.auth-form__field input {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
}

.auth-form__field input:focus {
  outline: 2px solid rgba(30, 90, 138, 0.25);
  border-color: var(--color-primary);
}

.auth-form__submit {
  margin-top: 0.25rem;
}

.auth-form__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.auth-form__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.form-message {
  margin-top: 1rem;
  padding: 0.75rem 0.875rem;
  font-size: 0.875rem;
  color: var(--color-primary);
  background: rgba(30, 90, 138, 0.08);
  border-radius: 8px;
}

.form-message--error {
  color: #b42318;
  background: #fef3f2;
}

[data-theme="dark"] .form-message--error {
  color: #fda29b;
  background: rgba(180, 35, 24, 0.18);
}

.app-modal[hidden] {
  display: none !important;
}

.app-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.app-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 20, 25, 0.45);
}

.app-modal__panel {
  position: relative;
  width: min(100%, 360px);
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.app-modal__title {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.app-modal__message {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  white-space: pre-wrap;
}

.app-modal--prompt .app-modal__message {
  margin-bottom: 0.875rem;
}

.app-modal__input {
  width: 100%;
  margin-top: 0.875rem;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font: inherit;
  color: var(--color-text);
  background: var(--color-bg);
}

.app-modal__input:focus {
  outline: 2px solid rgba(30, 90, 138, 0.25);
  border-color: var(--color-primary);
}

.app-modal__actions {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.app-modal--error .app-modal__message {
  color: #b42318;
}

[data-theme="dark"] .app-modal--error .app-modal__message {
  color: #fda29b;
}

.about-lead {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
  margin-bottom: 0;
}

.about-hero {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.about-hero__eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.about-hero__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

.about-hero__accent {
  color: #e8a800;
}

.about-hero__slogan {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.about-hero .about-lead {
  max-width: 42rem;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.about-card {
  padding: 1.125rem 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
  background: var(--color-surface, #fff);
}

.about-card h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.about-block + .about-block {
  margin-top: 1.75rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--color-border);
}

.about-block h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.875rem;
}

.about-block p,
.about-list {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.about-list {
  padding-left: 1.25rem;
}

.about-list--check {
  list-style: none;
  padding-left: 0;
}

.about-list--check li {
  position: relative;
  padding-left: 1.25rem;
  margin-bottom: 0.375rem;
}

.about-list--check li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.about-list--note {
  margin-top: 0.875rem;
}

.about-note {
  margin-bottom: 0.75rem;
}

.about-note--hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  opacity: 0.85;
}

.about-subject-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
}

.about-subject {
  padding: 1rem 1.125rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
  background: color-mix(in srgb, var(--color-primary) 4%, transparent);
}

.about-subject h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.about-subject__meta {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.625rem;
}

.about-table-wrap {
  overflow-x: auto;
  margin: 0.75rem 0;
}

.about-table {
  width: 100%;
  min-width: 28rem;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.about-table th,
.about-table td {
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--color-border);
  text-align: left;
  vertical-align: top;
}

.about-table thead th {
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  font-weight: 600;
  color: var(--color-text);
}

.about-table tbody th {
  font-weight: 600;
  white-space: nowrap;
}

.about-details {
  margin-top: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
  overflow: hidden;
}

.about-details summary {
  cursor: pointer;
  padding: 0.875rem 1rem;
  font-size: 0.9375rem;
  font-weight: 600;
  background: color-mix(in srgb, var(--color-primary) 6%, transparent);
}

.about-details__body {
  padding: 0.875rem 1rem 1rem;
}

.about-timetable-tabs__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.875rem;
}

.about-timetable-tabs__btn {
  padding: 0.4375rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface, #fff);
  color: var(--color-text-muted);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.about-timetable-tabs__btn.is-active {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
}

.about-timetable-tabs__panel {
  display: none;
}

.about-timetable-tabs__panel.is-active {
  display: block;
}

.about-timetable-section__intro {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

.about-timetable-section__heading {
  margin: 0 0 1rem;
  font-size: 1.0625rem;
  font-weight: 700;
  text-align: center;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.about-timetable-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.about-timetable-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
  overflow: hidden;
  background: var(--color-surface, #fff);
  box-shadow: var(--shadow-sm);
}

.about-timetable-card__title {
  margin: 0;
  padding: 0.875rem 1rem;
  font-size: 1.0625rem;
  font-weight: 700;
  text-align: center;
  background: var(--tt-accent, color-mix(in srgb, var(--color-primary) 12%, #fff));
  border-bottom: 1px solid var(--color-border);
}

.about-timetable-sessions {
  list-style: none;
  margin: 0;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.about-timetable-session {
  display: grid;
  grid-template-columns: 3.5rem 1fr auto;
  align-items: center;
  gap: 0.625rem;
  padding: 0.8125rem 0.875rem;
  border-radius: 0.625rem;
  background: color-mix(in srgb, var(--color-primary) 4%, transparent);
}

.about-timetable-session.is-muted {
  opacity: 0.72;
}

.about-timetable-session__subject {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 700;
}

.about-timetable-session__subject--math {
  color: #1565c0;
  background: #e3f2fd;
}

.about-timetable-session__subject--english {
  color: #e65100;
  background: #fff3e0;
}

.about-timetable-session__day {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
}

.about-timetable-session__time {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  text-align: right;
  line-height: 1.35;
  word-break: keep-all;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .about-timetable-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-timetable-session__time {
    font-size: 1.0625rem;
  }
}

.about-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(11rem, 1fr));
  gap: 0.75rem;
}

.about-gallery__item {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md, 0.75rem);
  border: 1px solid var(--color-border);
}

.about-gallery__item img {
  display: block;
  width: 100%;
  height: 10rem;
  object-fit: cover;
}

.about-location__map {
  margin: 0 0 1rem;
}

.about-location__map img {
  width: 100%;
  max-width: 36rem;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
}

.about-contact {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.375rem;
}

.about-contact__line,
.about-contact__hint {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.about-contact__hint {
  margin-top: 0.25rem;
  font-size: 0.8125rem;
  opacity: 0.85;
}

.about-qr-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: flex-start;
  gap: 2rem;
  width: 100%;
  margin-top: 1.25rem;
  padding-top: 0.25rem;
}

.about-qr {
  margin: 0;
  text-align: center;
}

.about-qr__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 8.75rem;
  height: 8.75rem;
  padding: 0.625rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 0.75rem);
  background: #fff;
  cursor: pointer;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.about-qr__btn:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 14px rgb(0 0 0 / 10%);
  transform: translateY(-1px);
}

.about-qr__btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.about-qr img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  background: #fff;
}

.about-qr-lightbox {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.about-qr-lightbox[hidden] {
  display: none !important;
}

.about-qr-lightbox-open {
  overflow: hidden;
}

.about-qr-lightbox__backdrop {
  position: absolute;
  inset: 0;
  border: 0;
  background: rgb(0 0 0 / 72%);
  cursor: pointer;
}

.about-qr-lightbox__panel {
  position: relative;
  z-index: 1;
  width: min(92vw, 22rem);
  padding: 1rem;
  border-radius: var(--radius-md, 0.75rem);
  background: #fff;
  box-shadow: 0 18px 48px rgb(0 0 0 / 28%);
  text-align: center;
}

.about-qr-lightbox__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  background: #fff;
}

.about-qr-lightbox__caption {
  margin: 0.75rem 0 0;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.about-qr-lightbox__close {
  margin-top: 0.875rem;
  padding: 0.4375rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface, #fff);
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.about-qr-lightbox__close:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.about-qr figcaption {
  margin-top: 0.375rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.about-block a {
  color: var(--color-primary);
}

@media (max-width: 640px) {
  .about-qr-grid {
    gap: 1.25rem;
  }
}

.members-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 1rem;
}

.members-empty {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  padding: 1rem 0;
}

.member-row {
  display: grid;
  grid-template-columns: minmax(80px, 1fr) auto auto minmax(120px, 140px) auto;
  gap: 0.625rem;
  align-items: center;
  padding: 0.75rem 0.875rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.member-row--header {
  background: transparent;
  border: none;
  padding: 0 0.875rem 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.member-row__name {
  min-width: 0;
}

.member-row__name-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem 0.5rem;
}

.member-row__name-text {
  font-weight: 600;
}

.member-row__memo-display {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.member-row__memo-editor[hidden] {
  display: none !important;
}

.member-row__memo-editor:not([hidden]) {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  flex: 0 1 auto;
  max-width: 100%;
}

.member-row__memo-input {
  width: min(160px, 100%);
  flex: 0 1 auto;
  min-width: 100px;
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font: inherit;
  font-size: 0.8125rem;
  color: var(--color-text);
  background: var(--color-surface);
}

.member-row__memo-input:focus {
  outline: 2px solid rgba(30, 90, 138, 0.25);
  border-color: var(--color-primary);
}

.member-row__memo-save {
  flex-shrink: 0;
  padding: 0.375rem 0.625rem;
  font-size: 0.8125rem;
}

.member-row__approve--pending {
  color: #fff;
  background: var(--color-primary-dark);
  border: 1px solid var(--color-primary-dark);
  font-weight: 600;
}

.member-row__approve--pending:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

[data-theme="dark"] .member-row__approve--pending {
  color: #fff;
  background: #3a7aad;
  border-color: #3a7aad;
}

[data-theme="dark"] .member-row__approve--pending:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.member-row__role {
  padding: 0.375rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font: inherit;
  font-size: 0.8125rem;
  color: var(--color-text);
  background: var(--color-surface);
}

@media (max-width: 720px) {
  .member-row,
  .member-row--header {
    grid-template-columns: 1fr;
  }

  .member-row--header {
    display: none;
  }

  .member-row__approve,
  .member-row__delete,
  .member-row__memo {
    width: 100%;
  }

  .member-row__role {
    width: 100%;
  }
}