/*
 * OfficesChair design layer
 * Palette sampled from the site logo: navy #0A1A3B, blue #1A52DB, cool grey #C4C8CC.
 * All selectors are oc- prefixed so nothing here collides with parent theme styles.
 */

.oc-scope {
  --oc-ink: #0A1A3B;
  --oc-paper: #F3F5F8;
  --oc-raised: #FFFFFF;
  --oc-line: #DEE2E9;
  --oc-line-strong: #C4C8CC;
  --oc-accent: #1A52DB;
  --oc-accent-strong: #0D3AA8;
  --oc-accent-tint: #E4EBFB;
  --oc-text: #0A1A3B;
  --oc-text-muted: #4A5570;
  --oc-text-subtle: #7C84A0;
  --oc-shadow: 10, 26, 59;

  --oc-font-display: 'Sora', system-ui, -apple-system, sans-serif;
  --oc-font-body: 'Public Sans', system-ui, -apple-system, sans-serif;

  --oc-radius-sm: 10px;
  --oc-radius-md: 18px;
}

[data-theme="dark"] .oc-scope {
  --oc-ink: #E7EAF2;
  --oc-paper: #0A0F1E;
  --oc-raised: #131A2C;
  --oc-line: #232B42;
  --oc-line-strong: #37415C;
  --oc-accent: #4C7DF2;
  --oc-accent-strong: #9AB8F8;
  --oc-accent-tint: #182544;
  --oc-text: #E7EAF2;
  --oc-text-muted: #A7AFC6;
  --oc-text-subtle: #6E7690;
  --oc-shadow: 0, 0, 0;
}

.oc-scope {
  background: var(--oc-paper);
  color: var(--oc-text);
  font-family: var(--oc-font-body);
}

.oc-scope h1,
.oc-scope h2,
.oc-scope h3,
.oc-scope h4 {
  font-family: var(--oc-font-display);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--oc-ink);
  margin: 0;
}

.oc-wrap {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.oc-eyebrow {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--oc-accent-strong);
  margin: 0 0 0.85rem;
}

.oc-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 600;
  padding: 0.3rem 0.6rem;
  color: var(--oc-accent-strong);
  background: var(--oc-accent-tint);
  border-radius: 999px;
  width: fit-content;
}

/* ---------- media ---------- */
.oc-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--oc-accent-tint);
  border-radius: 8px;
  position: relative;
}

.oc-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

.oc-media--empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--oc-accent);
}

.oc-media--empty i {
  font-size: 1.75rem;
  opacity: 0.55;
}

/* ---------- hero ---------- */
.oc-hero {
  padding: clamp(2.5rem, 6vw, 5rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.oc-hero__grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.oc-hero__title {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  line-height: 1.04;
  font-weight: 800;
  margin: 0 0 1.25rem;
}

.oc-hero__title em {
  color: var(--oc-accent);
  font-style: normal;
}

.oc-hero__sub {
  font-size: clamp(1.02rem, 1.6vw, 1.18rem);
  color: var(--oc-text-muted);
  max-width: 46ch;
  margin: 0 0 1.9rem;
}

.oc-hero__count {
  font-weight: 700;
  color: var(--oc-ink);
  font-variant-numeric: tabular-nums;
}

.oc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.oc-btn {
  font-family: var(--oc-font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.85rem 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: var(--oc-radius-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.oc-btn--primary {
  background: var(--oc-accent);
  color: #fff;
}

.oc-btn--primary:hover {
  background: var(--oc-accent-strong);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 14px 24px -10px rgba(var(--oc-shadow), 0.35);
}

.oc-btn--ghost {
  background: transparent;
  color: var(--oc-ink);
  border: 1.5px solid var(--oc-line-strong);
}

.oc-btn--ghost:hover {
  border-color: var(--oc-accent);
  color: var(--oc-accent-strong);
  transform: translateY(-2px);
}

.oc-hero__visual {
  position: relative;
  border-radius: var(--oc-radius-md);
  overflow: hidden;
  min-height: 20rem;
  display: flex;
  align-items: flex-end;
  text-decoration: none;
  background-size: cover;
  background-position: center;
  background-color: var(--oc-accent-tint);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.oc-hero__visual:hover {
  transform: translateY(-4px);
  box-shadow: 0 22px 40px -20px rgba(var(--oc-shadow), 0.35);
}

.oc-hero__visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 26, 59, 0.05) 0%, rgba(10, 26, 59, 0.4) 60%, rgba(6, 15, 35, 0.9) 100%);
}

.oc-hero__visual-body {
  position: relative;
  padding: 1.5rem 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.oc-hero__visual-body .oc-tag {
  color: #DCE7FF;
  background: rgba(255, 255, 255, 0.16);
}

.oc-hero__visual-body h2 {
  color: #fff;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.25;
}

/* ---------- section shell ---------- */
.oc-section {
  padding: 2.4rem 0;
  border-top: 1px solid var(--oc-line);
}

.oc-section__head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.4rem;
  flex-wrap: wrap;
}

.oc-section__head h2 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}

.oc-section__more {
  margin-left: auto;
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--oc-text-muted);
  white-space: nowrap;
  align-self: center;
}

.oc-section__more:hover {
  color: var(--oc-accent-strong);
}

/* ---------- style A: spotlight ---------- */
.oc-spotlight {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem;
}

.oc-spotlight__main {
  position: relative;
  border-radius: var(--oc-radius-md);
  overflow: hidden;
  min-height: 20rem;
  display: flex;
  align-items: flex-end;
  text-decoration: none;
  background-size: cover;
  background-position: center;
  background-color: var(--oc-accent-tint);
  transition: transform 0.2s ease;
}

.oc-spotlight__main:hover {
  transform: translateY(-3px);
}

.oc-spotlight__main::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 26, 59, 0.05) 0%, rgba(10, 26, 59, 0.85) 100%);
}

.oc-spotlight__main-body {
  position: relative;
  padding: 1.6rem 1.8rem;
}

.oc-spotlight__main-body h3 {
  color: #fff;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.2;
}

.oc-spotlight__side {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 1rem;
}

.oc-spotlight__item {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--oc-text);
}

.oc-spotlight__item .oc-media {
  flex: 1;
}

.oc-spotlight__item h3 {
  font-family: var(--oc-font-body);
  font-weight: 600;
  font-size: 0.86rem;
  line-height: 1.35;
}

.oc-spotlight__item:hover .oc-media img {
  transform: scale(1.06);
}

/* ---------- style B / C: icon rows ---------- */
.oc-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--oc-line);
}

.oc-rows li {
  border-bottom: 1px solid var(--oc-line);
}

.oc-rows a {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--oc-text);
  padding: 1rem 0.25rem;
  min-height: 44px;
  transition: gap 0.18s ease, color 0.18s ease;
}

.oc-rows a:hover {
  gap: 1.35rem;
  color: var(--oc-accent-strong);
}

.oc-rows__icon {
  flex: none;
  width: 2.3rem;
  height: 2.3rem;
  border-radius: 50%;
  background: var(--oc-accent-tint);
  color: var(--oc-accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}

.oc-rows__title {
  font-size: 0.96rem;
  font-weight: 500;
  line-height: 1.4;
}

.oc-rows__arrow {
  margin-left: auto;
  opacity: 0;
  flex: none;
  transition: opacity 0.18s ease;
}

.oc-rows a:hover .oc-rows__arrow {
  opacity: 1;
}

.oc-rows--2col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  column-gap: 2.25rem;
  position: relative;
}

.oc-rows--2col::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--oc-line);
}

/* ---------- style D: chips ---------- */
.oc-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.oc-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 1.1rem 0.5rem 0.5rem;
  border: 1px solid var(--oc-line);
  border-radius: 999px;
  background: var(--oc-raised);
  text-decoration: none;
  color: var(--oc-text);
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 44px;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.oc-chip:hover {
  transform: translateY(-3px);
  border-color: var(--oc-accent);
  color: var(--oc-accent-strong);
  box-shadow: 0 12px 22px -14px rgba(var(--oc-shadow), 0.3);
}

.oc-chip__icon {
  flex: none;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--oc-accent-tint);
  color: var(--oc-accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- style E: thumb list ---------- */
.oc-thumbs {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--oc-line);
}

.oc-thumbs li {
  border-bottom: 1px solid var(--oc-line);
}

.oc-thumbs a {
  display: flex;
  align-items: center;
  gap: 1.15rem;
  text-decoration: none;
  color: var(--oc-text);
  padding: 1.1rem 0.25rem;
  transition: padding-left 0.18s ease;
}

.oc-thumbs a:hover {
  padding-left: 0.5rem;
}

.oc-thumbs .oc-media {
  flex: none;
  width: 92px;
}

.oc-thumbs h3 {
  font-size: 1rem;
  line-height: 1.35;
}

.oc-thumbs p {
  font-size: 0.87rem;
  color: var(--oc-text-muted);
  margin: 0.3rem 0 0;
}

/* ---------- style F: checklist ---------- */
.oc-checks {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--oc-line);
}

.oc-checks li {
  border-bottom: 1px solid var(--oc-line);
}

.oc-checks a {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--oc-text);
  padding: 1.1rem 0.25rem;
  transition: padding-left 0.18s ease;
}

.oc-checks a:hover {
  padding-left: 0.5rem;
}

.oc-checks__mark {
  flex: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--oc-accent-tint);
  color: var(--oc-accent-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
}

.oc-checks .oc-media {
  flex: none;
  width: 74px;
}

.oc-checks h3 {
  font-family: var(--oc-font-body);
  font-weight: 600;
  font-size: 0.97rem;
  line-height: 1.35;
}

/* ---------- archive ---------- */
/* CHI dat padding doc. Element nay mang ca class .oc-wrap, ma .oc-wrap lo phan
   padding ngang - dung shorthand `padding: X 0 Y` o day se ghi de padding trai/phai
   ve 0 va lam chu cham sat mep man hinh dien thoai. */
.oc-archive {
  padding-top: clamp(1.75rem, 4vw, 2.75rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
}

.oc-archive__header {
  margin-bottom: 2.25rem;
}

.oc-archive__header h1 {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  margin: 0.6rem 0 0.9rem;
}

/* Header truoc day bi bo o max-width:62ch (~500px) trong khi .oc-grid ben duoi
   rong het 1280px, nen khoi chu trong nhu nam lech mot ben. Da bo gioi han o
   header de moi thu thang hang voi luoi san pham.
   Dong chu o 1280px kha dai, nen bu lai bang line-height cao va do tuong phan
   nhe hon thay vi thu hep chieu rong. */
.oc-archive__desc {
  color: var(--oc-text-muted);
  max-width: none;
  margin: 0 0 1.25rem;
  font-size: clamp(0.95rem, 0.9rem + 0.28vw, 1.06rem);
  line-height: 1.75;
}

.oc-archive__desc p {
  margin: 0 0 0.85rem;
}

.oc-archive__desc p:last-child {
  margin-bottom: 0;
}

.oc-archive__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
  font-size: 0.78rem;
  color: var(--oc-text-subtle);
}

.oc-tagname {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--oc-font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--oc-ink);
  background: var(--oc-accent-tint);
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.oc-tagname::before {
  content: "#";
  color: var(--oc-accent-strong);
}

.oc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.4rem;
  margin-bottom: 2.5rem;
}

.oc-card {
  background: var(--oc-raised);
  border: 1px solid var(--oc-line);
  border-radius: var(--oc-radius-sm);
  overflow: hidden;
  text-decoration: none;
  color: var(--oc-text);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.oc-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 30px -18px rgba(var(--oc-shadow), 0.28);
  border-color: var(--oc-accent);
}

.oc-card .oc-media {
  aspect-ratio: 16 / 10;
  border-radius: 0;
}

.oc-card__badge {
  position: absolute;
  top: 0.7rem;
  left: 0.7rem;
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--oc-ink);
  background: rgba(255, 255, 255, 0.92);
  padding: 0.22rem 0.5rem;
  border-radius: 999px;
}

.oc-card__body {
  padding: 1rem 1.1rem 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
}

.oc-card__body h2 {
  font-size: 1.02rem;
  line-height: 1.35;
}

.oc-card__body p {
  font-size: 0.87rem;
  color: var(--oc-text-muted);
  margin: 0;
  flex: 1;
}

.oc-card__meta {
  font-family: ui-monospace, 'SFMono-Regular', Menlo, monospace;
  font-size: 0.68rem;
  color: var(--oc-text-subtle);
  margin-top: 0.3rem;
}

.oc-empty {
  padding: 3rem 0;
  text-align: center;
  color: var(--oc-text-muted);
}

/* ---------- single post ---------- */
/* Cung loi nhu .oc-archive - xem ghi chu o tren. */
.oc-single {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-bottom: clamp(2.5rem, 6vw, 4rem);
}

.oc-single__inner {
  max-width: 900px;
  margin: 0 auto;
}

.oc-single__header {
  max-width: 72ch;
  margin: 0 auto 1.75rem;
}

.oc-single__header h1 {
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  margin: 0.75rem 0 1.1rem;
}

.oc-single__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 1.1rem;
  font-size: 0.9rem;
  color: var(--oc-text-muted);
}

.oc-single__meta > span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.oc-single__author {
  font-weight: 600;
  color: var(--oc-text);
}

.oc-single__author img {
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
}

.oc-single__body {
  max-width: 72ch;
  margin: 2rem auto 0;
  font-size: 1.06rem;
  line-height: 1.75;
}

.oc-single__body > h2 {
  font-size: 1.5rem;
  margin: 2.4rem 0 1rem;
}

.oc-single__body > h3 {
  font-size: 1.2rem;
  margin: 1.9rem 0 0.8rem;
}

.oc-single__body p {
  margin: 0 0 1.2rem;
}

.oc-single__body > p > a {
  color: var(--oc-accent-strong);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.oc-single__body img {
  max-width: 100%;
  height: auto;
  border-radius: var(--oc-radius-sm);
}

.oc-affiliate-note {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  background: var(--oc-accent-tint);
  border: 1px solid var(--oc-line);
  border-radius: var(--oc-radius-sm);
  padding: 0.9rem 1.1rem;
  margin: 0 auto 1.75rem;
  max-width: 72ch;
}

.oc-affiliate-note i {
  color: var(--oc-accent-strong);
  font-size: 1.1rem;
  line-height: 1.4;
}

.oc-affiliate-note p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--oc-text-muted);
  line-height: 1.55;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .oc-hero__grid {
    grid-template-columns: 1fr;
  }

  /* Tablet: dong chu da ngan lai nen ha line-height cho khoi chu dac hon */
  .oc-archive__header {
    margin-bottom: 1.9rem;
  }

  .oc-archive__desc {
    line-height: 1.7;
    margin-bottom: 1.1rem;
  }
}

@media (max-width: 720px) {
  .oc-spotlight {
    grid-template-columns: 1fr;
  }

  .oc-archive__header {
    margin-bottom: 1.6rem;
  }

  .oc-archive__desc p {
    margin-bottom: 0.75rem;
  }
}

@media (max-width: 640px) {
  /* Mobile: h1 nho lai va thu gon khoang cach de mo ta khong day luoi bai
     xuong qua sau duoi man hinh dau tien */
  .oc-archive__header {
    margin-bottom: 1.35rem;
  }

  .oc-archive__header h1 {
    margin: 0.45rem 0 0.65rem;
  }

  .oc-archive__desc {
    line-height: 1.65;
    margin-bottom: 0.9rem;
  }

  .oc-rows--2col {
    grid-template-columns: 1fr;
  }

  .oc-rows--2col::before {
    display: none;
  }

  .oc-thumbs .oc-media {
    width: 76px;
  }
}

@media (max-width: 420px) {
  .oc-spotlight__side {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .oc-checks .oc-media {
    display: none;
  }
}