/*
 * page-blog.css — Responsive structure
 *
 * Base        : structural / shared (colors, borders, display, position, etc.)
 * < 640px     : phone
 * >= 640px    : sm — small tablet (phone + minor upgrades)
 * >= 768px    : md — tablet (overrides sm mobile values)
 * >= 1024px   : lg — desktop (full desktop sizing)
 */

/* ===== Base (structural / shared — no sizing) ===== */
.tabs { background: #fff; border: 1px solid var(--theme-color-grey); border-radius: 10px; display: flex; flex-wrap: wrap; justify-content: flex-start; }
.tab { display: inline-flex; align-items: center; justify-content: center; border-radius: 10px; font-weight: 800; color: var(--theme-color-blue); background-color: var(--theme-color-skyblue-shallow); transition: .15s; }
.tab:hover { border-color: rgba(11,59,119,.22); color: rgba(11,59,119,1); }
.tab.is-active { background-color: var(--theme-color-orange-shallow); border-color: var(--theme-color-orange-shallow); color: var(--theme-color-orange); }

.post-list { display: grid; }
.post-card { position: relative; display: grid; background: #fff; border: 1px solid var(--theme-color-grey); border-radius: 10px; }
.badge-new { position: absolute; background: var(--theme-color-yellow); color: #000; font-weight: 900; border-radius: 55% 45% 60% 40% / 55% 60% 40% 45%; z-index: 3; }
.post-card__thumb { position: relative; display: block; border-radius: 12px; border: 1px solid var(--theme-color-grey); background: #f2f7fb; overflow: hidden; }
.post-card__img { width: 100%; height: 100%; object-fit: cover; display: block; }
.post-card__thumb--empty { display: grid; place-items: center; background-color: #e3e3e3; }
.post-card__body { display: grid; align-content: start; }
.post-card__meta { display: flex; align-items: center; justify-content: flex-start; }
.post-card__cat { font-weight: 900; color: #000; background: var(--theme-color-yellow); border-radius: 55% 34% 55% 45% / 62% 55% 60% 55%; }
.post-card__date { color: #000; font-weight: 800; }
.post-card__title { margin: 0; line-height: 1.5; letter-spacing: .02em; color: var(--theme-color-blue); }
.post-card__link { color: inherit; text-decoration: none; }
.post-card__link:hover { text-decoration: underline; text-underline-offset: 4px; }
.post-card__hashtag { color: var(--theme-color-blue); }
.post-card__excerpt { margin: 0; color: #000; }
.btn.btn--read { display: inline-flex; align-items: center; justify-content: center; border-radius: 6px; background-color: var(--theme-color-blue); color: #fff; border: 1px solid rgba(11,59,119,1); font-weight: 100; text-decoration: none; }
.btn.btn--read:hover { filter: brightness(.95); }

.pager { display: flex; align-items: center; justify-content: center; }
.pager__num { border-radius: 52% 44% 45% 42%; display: grid; place-items: center; font-weight: 900; background: #809FCC; border: 1px solid #809FCC; text-decoration: none; color: #fff; }
.pager__num.is-active { background: var(--theme-color-blue); border-color: var(--theme-color-blue); color: #fff; }
.pager__next { display: grid; place-items: center; font-weight: 900; color: var(--theme-color-blue); }

/* ===== Phone (< 640px) ===== */
@media (width < 640px) {
  .tabs { padding: 12px; gap: 10px; margin-bottom: 28px; }
  .tab { font-size: 14px; padding: 8px 10px; }
  .post-list { margin-top: 12px; gap: 12px; }
  .post-card { grid-template-columns: 1fr; gap: 12px; padding: 16px; }
  .badge-new { left: 4px; top: 6px; font-size: 14px; width: 48px; height: 48px; padding: 12px 4px; }
  .post-card__thumb { min-height: 160px; }
  .post-card__thumb--empty i { font-size: 48px; }
  .post-card__body { padding: 0; gap: 6px; }
  .post-card__meta { flex-wrap: wrap; gap: 12px; font-size: 14px; }
  .post-card__cat { padding: 6px 22px; font-size: 14px; }
  .post-card__date { font-size: 14px; }
  .post-card__title { font-size: 16px; }
  .post-card__excerpt { font-size: 14px; line-height: 1.75; }
  .btn.btn--read { width: 100%; font-size: 12px; padding: 10px 12px; }
  .pager { margin: 24px 0 48px; gap: 14px; }
  .pager__num { width: 56px; height: 52px; font-size: 14px; }
  .pager__next { width: 32px; height: 32px; }
}

/* ===== sm — small tablet (>= 640px) ===== */
@media (width >= 640px) {
  .tabs { padding: 12px; gap: 10px; margin-bottom: 28px; }
  .tab { font-size: 15px; padding: 8px 10px; }
  .post-list { margin-top: 12px; gap: 12px; }
  .post-card { grid-template-columns: 180px 1fr; gap: 12px; padding: 16px; }
  .badge-new { left: 4px; top: 6px; font-size: 14px; width: 48px; height: 48px; padding: 12px 4px; }
  .post-card__thumb { min-height: 160px; }
  .post-card__thumb--empty i { font-size: 48px; }
  .post-card__body { padding: 0; gap: 6px; }
  .post-card__meta { flex-wrap: wrap; gap: 12px; font-size: 15px; }
  .post-card__cat { padding: 6px 22px; font-size: 14px; }
  .post-card__date { font-size: 14px; }
  .post-card__title { font-size: 16px; }
  .post-card__excerpt { font-size: 14px; line-height: 1.75; }
  .btn.btn--read { width: 100%; font-size: 12px; padding: 10px 12px; }
  .pager { margin: 24px 0 48px; gap: 14px; }
  .pager__num { width: 56px; height: 52px; font-size: 14px; }
  .pager__next { width: 32px; height: 32px; }
}

/* ===== md — tablet (>= 768px) ===== */
@media (width >= 768px) {
  .tabs { padding: 14px; gap: 12px; margin-bottom: 36px; }
  .tab { font-size: 16px; padding: 8px 12px; }
  .post-list { margin-top: 14px; gap: 14px; }
  .post-card { grid-template-columns: 200px 1fr; gap: 14px; padding: 20px; }
  .badge-new { left: 6px; top: 8px; height: 52px; font-size: 16px; padding: 14px 6px; width: auto; }
  .post-card__thumb { min-height: 140px; }
  .post-card__thumb--empty i { font-size: 56px; }
  .post-card__body { padding: 0 8px; gap: 6px; }
  .post-card__meta { flex-wrap: nowrap; gap: 16px; font-size: 16px; }
  .post-card__cat { padding: 6px 26px; font-size: 15px; }
  .post-card__date { font-size: 15px; }
  .post-card__title { font-size: 17px; }
  .post-card__excerpt { font-size: 15px; line-height: 1.8; }
  .btn.btn--read { width: 120px; font-size: 12px; padding: 9px 12px; }
  .pager { margin: 28px 0 96px; gap: 18px; }
  .pager__num { width: 64px; height: 56px; font-size: 15px; }
  .pager__next { width: 34px; height: 34px; }
}

/* ===== lg — desktop (>= 1024px) ===== */
@media (width >= 1024px) {
  .tabs { padding: 16px; gap: 16px; margin-bottom: 48px; }
  .tab { font-size: 18px; padding: 8px 12px; }
  .post-list { margin-top: 16px; gap: 14px; }
  .post-card { grid-template-columns: 240px 1fr; gap: 16px; padding: 24px; }
  .badge-new { left: 6px; top: 8px; font-size: 18px; padding: 16px 6px; width: 60px; height: 60px; }
  .post-card__thumb { min-height: 138px; }
  .post-card__thumb--empty i { font-size: 72px; }
  .post-card__body { padding: 0 16px; gap: 8px; }
  .post-card__meta { gap: 24px; font-size: 18px; }
  .post-card__cat { padding: 8px 33px; }
  .post-card__title { font-size: 18px; }
  .post-card__excerpt { font-size: 16px; line-height: 1.85; }
  .btn.btn--read { width: 108px; font-size: 12px; padding: 9px 12px; }
  .pager { margin: 32px 0 128px; gap: 24px; }
  .pager__num { width: 72px; height: 64px; }
  .pager__next { width: 36px; height: 36px; }
}