/* ============================================================
   KNOTS Community Landing Page - Stylesheet
   Design: Asana Community style with KNOTS wood-tone branding
   ============================================================ */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --kn-primary: #3d2b1f;
  --kn-primary-light: #5c3d2e;
  --kn-accent: #8b6914;
  --kn-accent-light: #a67c00;
  --kn-text: #2c1810;
  --kn-text-sub: #6b5744;
  --kn-bg: #fffaf5;
  --kn-bg-card: #ffffff;
  --kn-border: #e8ddd0;
  --kn-border-light: #f0e8dc;
  --kn-meister-bg: #f5ede4;
  --kn-hero-start: #5c3d2e;
  --kn-hero-end: #3d2b1f;
  --kn-footer-bg: #2c1810;
  --kn-help-bg: #3d2b1f;
  --kn-radius-sm: 6px;
  --kn-radius-md: 10px;
  --kn-radius-lg: 16px;
  --kn-radius-pill: 999px;
  --kn-shadow-sm: 0 1px 3px rgba(44, 24, 16, 0.08);
  --kn-shadow-md: 0 4px 12px rgba(44, 24, 16, 0.1);
  --kn-transition: 0.2s ease;
  --kn-max-width: 1140px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--kn-text);
  background-color: var(--kn-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ---------- Skeleton Loading ---------- */
.kn-skeleton {
  display: block;
  background: linear-gradient(90deg, var(--kn-border-light) 25%, var(--kn-border) 50%, var(--kn-border-light) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 4px;
}

.kn-skeleton--text {
  height: 16px;
  width: 100%;
  margin-bottom: 12px;
}

.kn-skeleton--text-short {
  height: 16px;
  width: 60%;
}

.kn-skeleton--row {
  height: 48px;
  width: 100%;
}

.kn-skeleton--avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================================
   HEADER
   ============================================================ */
.kn-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--kn-bg-card);
  border-bottom: 1px solid var(--kn-border);
}

.kn-header__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.kn-header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--kn-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.kn-header__logo-text {
  font-size: 20px;
  letter-spacing: -0.5px;
}

.kn-header__logo-sub {
  font-size: 13px;
  font-weight: 400;
  color: var(--kn-text-sub);
  margin-left: -2px;
}

.kn-header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: 48px;
}

.kn-header__nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--kn-text-sub);
  transition: color var(--kn-transition);
}

.kn-header__nav-link:hover {
  color: var(--kn-accent);
}

.kn-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kn-header__login-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--kn-accent);
  color: #fff;
  border-radius: var(--kn-radius-pill);
  font-size: 14px;
  font-weight: 600;
  transition: background var(--kn-transition);
}

.kn-header__login-btn:hover {
  background: var(--kn-accent-light);
}

/* Logged-in user button (replaces login button) */
.kn-header__user-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px 4px 4px;
  background: var(--kn-meister-bg);
  border-radius: var(--kn-radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--kn-text);
  transition: background var(--kn-transition);
}

.kn-header__user-btn:hover {
  background: var(--kn-border);
}

.kn-header__user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: block;
}

.kn-header__user-avatar-placeholder {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--kn-border);
  display: block;
}

.kn-header__user-name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kn-header__menu-btn,
.kn-header__search-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--kn-text-sub);
  padding: 4px;
}

.kn-header__search-btn {
  display: flex;
  align-items: center;
}

.kn-header__mobile-nav {
  display: none;
  flex-direction: column;
  padding: 12px 24px 16px;
  border-top: 1px solid var(--kn-border);
  background: var(--kn-bg-card);
}

.kn-header__mobile-nav.is-open {
  display: flex;
}

.kn-header__mobile-nav a {
  padding: 10px 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--kn-text);
  border-bottom: 1px solid var(--kn-border-light);
}

/* ============================================================
   HERO
   ============================================================ */
.kn-hero {
  background: linear-gradient(135deg, var(--kn-hero-start), var(--kn-hero-end));
  color: #fff;
  padding: 56px 24px 48px;
}

.kn-hero__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.kn-hero__content {
  flex: 1;
  min-width: 0;
}

.kn-hero__title {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}

.kn-hero__search {
  position: relative;
  max-width: 520px;
  margin-bottom: 32px;
}

.kn-hero__search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--kn-text-sub);
  pointer-events: none;
}

.kn-hero__search-input {
  width: 100%;
  padding: 14px 16px 14px 48px;
  border: none;
  border-radius: var(--kn-radius-md);
  font-size: 16px;
  font-family: inherit;
  background: #fff;
  color: var(--kn-text);
  outline: none;
  transition: box-shadow var(--kn-transition);
}

.kn-hero__search-input::placeholder {
  color: #999;
}

.kn-hero__search-input:focus {
  box-shadow: 0 0 0 3px rgba(139, 105, 20, 0.3);
}

.kn-hero__stats {
  display: flex;
  gap: 40px;
}

.kn-hero__stat {
  display: flex;
  flex-direction: column;
}

.kn-hero__stat-number {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
}

.kn-hero__stat-label {
  font-size: 13px;
  opacity: 0.8;
  font-weight: 400;
}

.kn-hero__illust {
  flex-shrink: 0;
  opacity: 0.6;
}

/* ============================================================
   FEATURED 3-COLUMN
   ============================================================ */
.kn-featured {
  padding: 56px 24px;
  background: var(--kn-bg);
}

.kn-featured__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.kn-featured__card {
  background: var(--kn-bg-card);
  border: 1px solid var(--kn-border);
  border-radius: var(--kn-radius-lg);
  padding: 28px;
}

.kn-featured__card-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--kn-primary);
  margin-bottom: 20px;
}

.kn-featured__list {
  list-style: none;
}

.kn-featured__item {
  margin-bottom: 16px;
}

.kn-featured__item:last-child {
  margin-bottom: 0;
}

.kn-featured__item a {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--kn-text);
  line-height: 1.5;
  transition: color var(--kn-transition);
}

.kn-featured__item a:hover {
  color: var(--kn-accent);
}

.kn-featured__item-date {
  display: block;
  font-size: 12px;
  color: var(--kn-text-sub);
  margin-top: 2px;
  font-weight: 400;
}

.kn-featured__item-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--kn-accent);
  background: var(--kn-meister-bg);
  padding: 2px 8px;
  border-radius: var(--kn-radius-sm);
  margin-top: 4px;
}

/* ============================================================
   CATEGORIES
   ============================================================ */
.kn-categories {
  padding: 16px 24px 56px;
  background: var(--kn-bg);
}

.kn-categories__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
}

.kn-categories__title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 28px;
}

.kn-categories__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.kn-categories__card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--kn-bg-card);
  border: 1px solid var(--kn-border);
  border-radius: var(--kn-radius-lg);
  transition: border-color var(--kn-transition), box-shadow var(--kn-transition);
}

.kn-categories__card:hover {
  border-color: var(--kn-accent);
  box-shadow: var(--kn-shadow-md);
}

.kn-categories__icon {
  flex-shrink: 0;
}

.kn-categories__card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.kn-categories__card-desc {
  font-size: 13px;
  color: var(--kn-text-sub);
  line-height: 1.5;
}

.kn-categories__see-more {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 24px;
  border: 1px solid var(--kn-border);
  border-radius: var(--kn-radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--kn-text);
  transition: border-color var(--kn-transition), color var(--kn-transition);
}

.kn-categories__see-more:hover {
  border-color: var(--kn-accent);
  color: var(--kn-accent);
}

/* ============================================================
   MEISTER BANNER
   ============================================================ */
.kn-meister {
  padding: 0 24px;
  margin-bottom: 56px;
}

.kn-meister__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 36px 40px;
  background: var(--kn-meister-bg);
  border-radius: var(--kn-radius-lg);
}

.kn-meister__illust {
  flex-shrink: 0;
}

.kn-meister__content {
  flex: 1;
  min-width: 0;
}

.kn-meister__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--kn-primary);
  margin-bottom: 8px;
}

.kn-meister__desc {
  font-size: 14px;
  color: var(--kn-text-sub);
  line-height: 1.7;
}

.kn-meister__cta {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  padding: 12px 28px;
  background: var(--kn-accent);
  color: #fff;
  border-radius: var(--kn-radius-pill);
  font-size: 15px;
  font-weight: 600;
  transition: background var(--kn-transition);
}

.kn-meister__cta:hover {
  background: var(--kn-accent-light);
}

/* ============================================================
   COMMUNITY TOPICS
   ============================================================ */
.kn-topics {
  padding: 0 24px 56px;
  background: var(--kn-bg);
}

.kn-topics__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
}

.kn-topics__title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
}

.kn-topics__tabs {
  margin-bottom: 16px;
}

.kn-topics__tab {
  display: inline-block;
  padding: 8px 20px;
  border: none;
  border-radius: var(--kn-radius-pill);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--kn-transition), color var(--kn-transition);
  background: var(--kn-accent);
  color: #fff;
}

.kn-topics__table {
  width: 100%;
  border-collapse: collapse;
}

.kn-topics__th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--kn-text-sub);
  border-bottom: 2px solid var(--kn-border);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.kn-topics__th--num {
  text-align: center;
  width: 80px;
}

.kn-topics__row {
  border-bottom: 1px solid var(--kn-border-light);
  transition: background var(--kn-transition);
}

.kn-topics__row:hover {
  background: rgba(139, 105, 20, 0.03);
}

.kn-topics__row td {
  padding: 14px 12px;
  vertical-align: middle;
}

.kn-topics__topic-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kn-topics__topic-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--kn-text);
  transition: color var(--kn-transition);
}

.kn-topics__topic-title:hover {
  color: var(--kn-accent);
}

.kn-topics__topic-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.kn-topics__topic-category {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--kn-radius-sm);
  background: var(--kn-meister-bg);
  color: var(--kn-accent);
}

.kn-topics__topic-avatars {
  display: flex;
  margin-left: auto;
}

.kn-topics__topic-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--kn-bg);
  margin-left: -6px;
  background: var(--kn-border);
}

.kn-topics__topic-avatar:first-child {
  margin-left: 0;
}

.kn-topics__num-cell {
  text-align: center;
  font-size: 14px;
  color: var(--kn-text-sub);
  font-weight: 500;
}

/* ============================================================
   CONTRIBUTORS + TESTIMONIAL
   ============================================================ */
.kn-contrib {
  padding: 0 24px 56px;
  background: var(--kn-bg);
}

.kn-contrib__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.kn-contrib__ranking-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.kn-contrib__list {
  list-style: none;
  counter-reset: rank;
}

.kn-contrib__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--kn-border-light);
  counter-increment: rank;
}

.kn-contrib__item::before {
  content: counter(rank);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  font-size: 12px;
  font-weight: 700;
  color: var(--kn-accent);
  flex-shrink: 0;
}

.kn-contrib__item--loading::before {
  content: '';
}

.kn-contrib__avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--kn-border);
  flex-shrink: 0;
}

.kn-contrib__name {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
}

.kn-contrib__name small {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--kn-text-sub);
}

.kn-contrib__posts {
  font-size: 18px;
  font-weight: 700;
  color: var(--kn-primary);
}

.kn-contrib__posts-label {
  font-size: 11px;
  color: var(--kn-text-sub);
  display: block;
  font-weight: 400;
}

.kn-contrib__see-more {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--kn-accent);
  transition: opacity var(--kn-transition);
}

.kn-contrib__see-more:hover {
  opacity: 0.7;
}

.kn-contrib__testimonial {
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--kn-primary);
  color: #fff;
  border-radius: var(--kn-radius-lg);
  padding: 36px;
}

.kn-contrib__quote {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.8;
  margin-bottom: 24px;
  font-style: italic;
}

.kn-contrib__quote::before {
  content: '\201C\201C';
  display: block;
  font-size: 36px;
  line-height: 1;
  margin-bottom: 8px;
  opacity: 0.4;
  font-style: normal;
}

.kn-contrib__author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kn-contrib__author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
}

.kn-contrib__author-name {
  font-size: 14px;
  font-weight: 600;
  display: block;
}

.kn-contrib__author-role {
  font-size: 12px;
  opacity: 0.7;
}

/* ============================================================
   HELP
   ============================================================ */
.kn-help {
  padding: 56px 24px;
  background: var(--kn-help-bg);
  color: #fff;
}

.kn-help__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
}

.kn-help__title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 28px;
}

.kn-help__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.kn-help__card {
  position: relative;
  padding: 24px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--kn-radius-lg);
  transition: background var(--kn-transition), border-color var(--kn-transition);
}

.kn-help__card:hover {
  background: rgba(255,255,255,0.14);
  border-color: rgba(255,255,255,0.25);
}

.kn-help__card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.kn-help__card-desc {
  font-size: 13px;
  opacity: 0.75;
  line-height: 1.5;
}

.kn-help__card-arrow {
  position: absolute;
  top: 24px;
  right: 24px;
  opacity: 0.5;
  transition: opacity var(--kn-transition);
}

.kn-help__card:hover .kn-help__card-arrow {
  opacity: 1;
}

/* ============================================================
   FOOTER
   ============================================================ */
.kn-footer {
  background: var(--kn-footer-bg);
  color: #fff;
  padding: 48px 24px 24px;
}

.kn-footer__inner {
  max-width: var(--kn-max-width);
  margin: 0 auto;
}

.kn-footer__top {
  display: flex;
  gap: 64px;
  margin-bottom: 40px;
}

.kn-footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.kn-footer__brand-name {
  font-size: 20px;
  font-weight: 700;
}

.kn-footer__links {
  display: flex;
  gap: 48px;
  flex: 1;
}

.kn-footer__col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kn-footer__col-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  color: rgba(255,255,255,0.6);
}

.kn-footer__col a {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  transition: color var(--kn-transition);
}

.kn-footer__col a:hover {
  color: #fff;
}

.kn-footer__bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
}

.kn-footer__copyright {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

/* Tablet */
@media (max-width: 1024px) {
  .kn-hero__title {
    font-size: 34px;
  }

  .kn-hero__illust {
    display: none;
  }

  .kn-featured__inner {
    grid-template-columns: repeat(2, 1fr);
  }

  .kn-featured__card:last-child {
    grid-column: span 2;
  }

  .kn-categories__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .kn-help__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .kn-footer__top {
    flex-direction: column;
    gap: 32px;
  }

  .kn-footer__links {
    flex-wrap: wrap;
    gap: 32px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  .kn-header__nav {
    display: none;
  }

  .kn-header__menu-btn {
    display: flex;
    align-items: center;
  }

  .kn-header__login-btn,
  .kn-header__user-btn {
    display: none;
  }

  .kn-hero {
    padding: 36px 24px 32px;
  }

  .kn-hero__title {
    font-size: 28px;
    margin-bottom: 20px;
  }

  .kn-hero__stats {
    gap: 24px;
  }

  .kn-hero__stat-number {
    font-size: 24px;
  }

  .kn-featured__inner {
    grid-template-columns: 1fr;
  }

  .kn-featured__card:last-child {
    grid-column: auto;
  }

  .kn-categories__grid {
    grid-template-columns: 1fr;
  }

  .kn-categories__title {
    font-size: 26px;
  }

  .kn-meister__inner {
    flex-direction: column;
    text-align: center;
    padding: 28px 24px;
  }

  .kn-topics__title {
    font-size: 26px;
  }

  .kn-topics__th--num {
    display: none;
  }

  .kn-topics__num-cell {
    display: none;
  }

  .kn-contrib__inner {
    grid-template-columns: 1fr;
  }

  .kn-help__title {
    font-size: 22px;
  }

  .kn-help__grid {
    grid-template-columns: 1fr;
  }

  .kn-footer__links {
    flex-direction: column;
    gap: 24px;
  }
}