/* ============================================================
   Note Feed — latest-articles card module
   Designed to drop into any Tsunagu Project page.
   ============================================================ */

.nf-section {
  background: var(--bg);
  padding: var(--sp-8) var(--sp-5);
}
.nf-container {
  max-width: var(--container);
  margin: 0 auto;
}

/* ---------- Header ---------- */
.nf-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-5);
  padding-bottom: var(--sp-5);
  border-bottom: 1px solid var(--line-200);
  margin-bottom: var(--sp-6);
}
.nf-head__title-wrap { display: flex; flex-direction: column; gap: var(--sp-2); }
.nf-head__eyebrow {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-12);
  letter-spacing: var(--tr-eyebrow);
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.nf-head__eyebrow::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 999px;
  background: var(--accent);
}
.nf-head__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-30);
  line-height: var(--lh-tight);
  letter-spacing: var(--tr-display);
  color: var(--fg-1);
  margin: 0;
}
.nf-head__sub {
  font-size: var(--fs-14);
  color: var(--fg-3);
  margin: 0;
}
.nf-head__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-14);
  color: var(--fg-1);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: var(--r-full);
  border: 1px solid var(--line-300);
  background: var(--washi-0);
  transition: transform var(--dur-micro) var(--ease),
              border-color var(--dur-micro) var(--ease);
  white-space: nowrap;
}
.nf-head__cta:hover {
  transform: translateY(-1px);
  border-color: var(--ink-900);
}
.nf-head__cta svg { width: 14px; height: 14px; }

/* ---------- Grid layouts ---------- */
.nf-grid {
  display: grid;
  gap: var(--sp-5);
}
.nf-grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
.nf-grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
.nf-grid--list   { grid-template-columns: 1fr; gap: 0; }

@media (max-width: 880px) {
  .nf-grid--cols-3, .nf-grid--cols-2 { grid-template-columns: 1fr; }
}

/* ============================================================
   Variant A — Card (with thumbnail)
   ============================================================ */
.nf-card {
  display: flex;
  flex-direction: column;
  background: var(--washi-0);
  border: 1px solid var(--line-200);
  border-radius: var(--r-lg);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform var(--dur-std) var(--ease),
              box-shadow var(--dur-std) var(--ease),
              border-color var(--dur-std) var(--ease);
  position: relative;
}
.nf-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-300);
}

.nf-card__thumb {
  aspect-ratio: 16 / 9;
  background: var(--washi-100);
  position: relative;
  overflow: hidden;
}
.nf-card__thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--dur-hero) var(--ease);
}
.nf-card:hover .nf-card__thumb img { transform: scale(1.04); }

.nf-card__thumb--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, var(--thread-100) 0%, var(--washi-100) 100%);
}
.nf-card__thumb--placeholder svg {
  width: 56px; height: 56px;
  color: var(--thread-500);
  opacity: 0.5;
}

.nf-card__body {
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  flex: 1;
}
.nf-card__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--fg-3);
  letter-spacing: 0.02em;
}
.nf-card__meta-dot {
  width: 3px; height: 3px;
  background: var(--fg-muted);
  border-radius: 999px;
}
.nf-card__tag {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: var(--r-full);
  background: var(--thread-100);
  color: var(--thread-700);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-12);
  letter-spacing: 0.02em;
}
.nf-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-20);
  line-height: var(--lh-snug);
  letter-spacing: var(--tr-display);
  color: var(--fg-1);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.nf-card__excerpt {
  font-size: var(--fs-14);
  line-height: var(--lh-normal);
  color: var(--fg-3);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.nf-card__footer {
  margin-top: auto;
  padding-top: var(--sp-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--fs-12);
  color: var(--fg-3);
}
.nf-card__read {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-weight: 600;
  color: var(--ink-900);
}
.nf-card__read svg {
  width: 14px; height: 14px;
  transition: transform var(--dur-micro) var(--ease);
}
.nf-card:hover .nf-card__read svg { transform: translateX(3px); }

/* ============================================================
   Variant B — List row (no thumbnail, dense)
   ============================================================ */
.nf-row {
  display: grid;
  grid-template-columns: 110px 80px 1fr auto;
  gap: var(--sp-5);
  align-items: center;
  padding: var(--sp-5) 0;
  border-bottom: 1px solid var(--line-100);
  text-decoration: none;
  color: inherit;
  transition: background var(--dur-micro) var(--ease);
}
.nf-row:hover { background: var(--washi-100); }
.nf-row:hover .nf-row__title { color: var(--ink-900); }
.nf-row:last-child { border-bottom: 0; }

.nf-row__date {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  color: var(--fg-3);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.nf-row__tag {
  display: inline-flex;
  padding: 3px 10px;
  border-radius: var(--r-full);
  background: var(--thread-100);
  color: var(--thread-700);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--fs-12);
  justify-self: start;
}
.nf-row__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-18);
  line-height: var(--lh-snug);
  color: var(--fg-1);
  margin: 0;
  transition: color var(--dur-micro) var(--ease);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.nf-row__arrow {
  width: 32px; height: 32px;
  border-radius: 999px;
  display: flex; align-items: center; justify-content: center;
  background: transparent;
  border: 1px solid var(--line-200);
  color: var(--fg-2);
  transition: all var(--dur-micro) var(--ease);
}
.nf-row:hover .nf-row__arrow {
  background: var(--ink-900);
  border-color: var(--ink-900);
  color: var(--washi-0);
}
.nf-row__arrow svg { width: 14px; height: 14px; }

@media (max-width: 720px) {
  .nf-row { grid-template-columns: 90px 1fr; row-gap: 4px; }
  .nf-row__tag { grid-column: 2; }
  .nf-row__title { grid-column: 1 / -1; }
  .nf-row__arrow { display: none; }
}

/* ============================================================
   Variant C — Editorial (large hero + 2 small)
   ============================================================ */
.nf-edit {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--sp-5);
}
.nf-edit__side {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}
.nf-edit .nf-card--lead .nf-card__title { font-size: var(--fs-30); }
.nf-edit .nf-card--lead .nf-card__excerpt {
  font-size: var(--fs-16);
  -webkit-line-clamp: 4;
}
.nf-edit .nf-card--side {
  flex-direction: row;
}
.nf-edit .nf-card--side .nf-card__thumb {
  flex: 0 0 38%;
  aspect-ratio: auto;
}
.nf-edit .nf-card--side .nf-card__body { padding: var(--sp-4); }
.nf-edit .nf-card--side .nf-card__title {
  font-size: var(--fs-16);
  -webkit-line-clamp: 3;
}
.nf-edit .nf-card--side .nf-card__excerpt { display: none; }

@media (max-width: 880px) {
  .nf-edit { grid-template-columns: 1fr; }
  .nf-edit .nf-card--side { flex-direction: column; }
  .nf-edit .nf-card--side .nf-card__thumb { flex: 1; aspect-ratio: 16/9; }
}

/* ============================================================
   Loading + empty states
   ============================================================ */
.nf-skel {
  background: var(--washi-0);
  border: 1px solid var(--line-200);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.nf-skel__thumb {
  aspect-ratio: 16/9;
  background: linear-gradient(90deg, var(--washi-100) 0%, var(--washi-200) 50%, var(--washi-100) 100%);
  background-size: 200% 100%;
  animation: nfShimmer 1.6s ease-in-out infinite;
}
.nf-skel__line {
  height: 12px;
  margin: 12px var(--sp-5);
  border-radius: 4px;
  background: linear-gradient(90deg, var(--washi-100) 0%, var(--washi-200) 50%, var(--washi-100) 100%);
  background-size: 200% 100%;
  animation: nfShimmer 1.6s ease-in-out infinite;
}
.nf-skel__line--short { width: 40%; }
.nf-skel__line--last { margin-bottom: var(--sp-5); }

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