/* ==========================================================================
   blog.css — XiroTV editorial blog listing.
   Global look from style.css; breadcrumb/active-nav from pricing.css.
   Article thumbnails are CSS/SVG gradient panels (no stock photography).
   ========================================================================== */

/* ---------- Hero ---------- */
.blog-hero { position: relative; overflow: hidden; padding: clamp(36px, 5vw, 72px) 0 clamp(24px, 3vw, 40px); }
.blog-hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(55% 70% at 16% 12%, color-mix(in srgb, var(--blue) 22%, transparent) 0%, transparent 55%),
    radial-gradient(50% 70% at 88% 20%, var(--accent-soft) 0%, transparent 55%);
  background-size: 160% 160%, 160% 160%;
}
.blog-hero .container { position: relative; z-index: 2; }
.blog-hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: clamp(24px, 4vw, 56px); align-items: center; }
.blog-hero h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); font-weight: 800; letter-spacing: -0.03em; }
.blog-hero .lead { color: var(--text-soft); font-size: clamp(1rem, 1.5vw, 1.16rem); margin: 16px 0 24px; max-width: 560px; }

/* Search box */
.blog-search { position: relative; max-width: 560px; }
.blog-search svg.search-ico { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--text-mute); pointer-events: none; }
.blog-search input {
  width: 100%; height: 52px; padding: 0 46px 0 46px;
  border-radius: var(--radius-pill); border: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; font-size: .98rem;
  backdrop-filter: var(--nav-blur);
}
.blog-search input::placeholder { color: var(--text-mute); }
.blog-search input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.search-clear {
  position: absolute; right: 10px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--surface-2); color: var(--text-soft); display: none; align-items: center; justify-content: center;
}
.search-clear.show { display: inline-flex; }
.search-clear:hover { color: var(--accent); }

/* Editorial SVG visual */
.blog-visual { position: relative; }
.blog-visual .screen {
  border: 1px solid var(--border-strong); border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--surface-solid), var(--bg-elev));
  box-shadow: var(--shadow-lg); padding: 18px; overflow: hidden;
}
.blog-visual .screen-bar { display: flex; gap: 6px; margin-bottom: 14px; }
.blog-visual .screen-bar span { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.blog-visual .waves { display: grid; place-items: center; height: 150px; }
.blog-visual .wave-lines { display: flex; gap: 8px; align-items: flex-end; height: 90px; }
.blog-visual .wave-lines i { width: 10px; border-radius: 6px; background: var(--grad-brand); animation: wave 1.8s ease-in-out infinite; }
@keyframes wave { 0%,100% { height: 24px; opacity:.7 } 50% { height: 84px; opacity:1 } }
.blog-visual .chips { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.blog-visual .chips span { font-size: .72rem; color: var(--text-soft); background: var(--surface-2); border: 1px solid var(--border); padding: 5px 11px; border-radius: var(--radius-pill); }

/* ---------- Thumbnails (shared by all cards) ---------- */
.article-thumb {
  position: relative; aspect-ratio: 16 / 9; border-radius: var(--radius); overflow: hidden;
  display: grid; place-items: center; border: 1px solid var(--border);
  background: linear-gradient(135deg, #07130d 0%, #0d3320 60%, #1a5c2e 100%);
}
.article-thumb .t-glyph { color: rgba(255,255,255,.9); opacity: .9; }
.article-thumb::after { content: ""; position: absolute; inset: 0; background: radial-gradient(80% 120% at 85% 15%, var(--accent-glow) 0%, transparent 55%); opacity: .5; }
.article-thumb .t-cat { position: absolute; left: 12px; bottom: 12px; z-index: 2; font-size: .68rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: #fff; background: rgba(0,0,0,.38); border: 1px solid rgba(255,255,255,.16); padding: 4px 10px; border-radius: var(--radius-pill); backdrop-filter: blur(4px); }
.thumb-education { background: linear-gradient(135deg,#0f2a3a,#153a4a 60%,#241a2e); }
.thumb-apps      { background: linear-gradient(135deg,#1a1840,#2a2160 60%,#3a1f2e); }
.thumb-trouble   { background: linear-gradient(135deg,#3a1a1a,#4a241f 60%,#241a2e); }
.thumb-tips      { background: linear-gradient(135deg,#122c22,#1a3a2c 60%,#241f16); }
.thumb-sports    { background: linear-gradient(135deg,#102a3f,#16324a 60%,#2a1f16); }

/* ---------- Featured article ---------- */
.featured {
  display: grid; grid-template-columns: 1.15fr 1fr; gap: clamp(20px, 3vw, 40px);
  align-items: center; padding: clamp(18px, 2.4vw, 26px);
  border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(8px);
}
.featured .article-thumb { aspect-ratio: 16 / 10; }
.featured .f-cat { display: inline-flex; align-items: center; gap: 8px; font-size: .74rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--accent); }
.featured h2 { font-size: clamp(1.4rem, 3vw, 2rem); margin: 12px 0 10px; letter-spacing: -0.02em; }
.featured p { color: var(--text-soft); margin: 0 0 16px; }
.featured .f-meta { color: var(--text-mute); font-size: .85rem; margin-bottom: 18px; }

/* ---------- Category filters ---------- */
.cat-bar { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 6px; scrollbar-width: none; }
.cat-bar::-webkit-scrollbar { display: none; }
.cat-pill {
  flex: none; min-height: 42px; padding: 0 18px;
  border-radius: var(--radius-pill); border: 1px solid var(--border);
  background: var(--surface); color: var(--text-soft);
  font: inherit; font-weight: 600; font-size: .9rem; cursor: pointer; white-space: nowrap;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.cat-pill:hover { color: var(--text); border-color: var(--border-strong); }
.cat-pill[aria-selected="true"] { color: #ffffff; background: var(--grad-brand); border-color: transparent; }

/* ---------- Section head with control ---------- */
.blog-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.blog-head h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; }
.sort-control { display: inline-flex; align-items: center; gap: 8px; color: var(--text-mute); font-size: .88rem; }
.sort-control select {
  font: inherit; font-size: .9rem; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-pill); padding: 8px 14px; cursor: pointer;
}

/* ---------- Article grid ---------- */
.article-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 980px; margin-inline: auto; }
.article-card {
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; backdrop-filter: blur(8px);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.article-card:hover { transform: translateY(-5px); border-color: var(--border-strong); box-shadow: var(--shadow-md); }
.article-card .thumb-wrap { overflow: hidden; }
.article-card .article-thumb { border: none; border-radius: 0; transition: transform .3s ease; }
.article-card:hover .article-thumb { transform: scale(1.05); }
.article-body { padding: 20px; display: flex; flex-direction: column; flex-grow: 1; }
.article-cat { font-size: .72rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--accent); }
.article-card h3 { font-size: 1.12rem; line-height: 1.3; margin: 8px 0 8px; letter-spacing: -0.01em; }
.article-card h3 a { color: var(--text); }
.article-card h3 a:hover { color: var(--accent); }
.article-excerpt { color: var(--text-soft); font-size: .92rem; margin: 0 0 16px; flex-grow: 1; }
.article-meta { color: var(--text-mute); font-size: .82rem; margin-bottom: 14px; }
.read-link { display: inline-flex; align-items: center; gap: 7px; color: var(--accent); font-weight: 600; font-size: .9rem; margin-top: auto; }
.read-link svg { transition: transform .2s ease; }
.article-card:hover .read-link svg { transform: translateX(4px); }

.load-more-wrap { text-align: center; margin-top: 34px; }

/* Empty state */
.blog-empty { text-align: center; padding: 56px 20px; color: var(--text-soft); border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); }
.blog-empty h3 { color: var(--text); margin-bottom: 8px; }

/* ---------- Topic / education / device / sports cards ---------- */
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.topic-card {
  display: flex; align-items: center; gap: 14px; padding: 20px;
  border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-weight: 600; transition: border-color .2s ease, transform .2s ease;
}
.topic-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.topic-card .tp-icon { flex: none; width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; background: var(--accent-soft); color: var(--accent); }

.edu-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.edu-card { padding: 28px 24px; border-radius: var(--radius-lg); background: var(--surface); border: 1px solid var(--border); backdrop-filter: blur(8px); transition: transform .22s ease, border-color .22s ease; }
.edu-card:hover { transform: translateY(-5px); border-color: var(--border-strong); }
.edu-card .edu-icon { display: inline-flex; width: 50px; height: 50px; align-items: center; justify-content: center; border-radius: 13px; background: var(--accent-soft); color: var(--accent); margin-bottom: 16px; }
.edu-card h3 { font-size: 1.16rem; margin-bottom: 8px; }
.edu-card p { color: var(--text-soft); font-size: .94rem; margin: 0 0 14px; }
.edu-card a { color: var(--accent); font-weight: 600; font-size: .9rem; }

.dev-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.dev-card { padding: 22px 16px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); text-align: center; color: var(--text); font-weight: 600; font-size: .92rem; transition: border-color .2s ease, transform .2s ease; }
.dev-card:hover { border-color: var(--accent); transform: translateY(-4px); color: var(--accent); }
.dev-card .dv-icon { display: inline-flex; color: var(--accent); margin-bottom: 12px; }

.sports-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.sports-card { display: flex; align-items: flex-start; gap: 14px; padding: 22px; border-radius: var(--radius); background: var(--surface); border: 1px solid var(--border); }
.sports-card .sp-icon { flex: none; width: 44px; height: 44px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; background: var(--accent-soft); color: var(--accent); }
.sports-card h3 { font-size: 1rem; margin: 0 0 4px; }
.sports-card p { color: var(--text-soft); font-size: .88rem; margin: 0; }

/* ---------- Newsletter ---------- */
.newsletter { position: relative; overflow: hidden; text-align: center; padding: clamp(36px, 5vw, 60px) var(--gutter); border-radius: var(--radius-lg); border: 1px solid var(--border); background: var(--grad-cta); }
.newsletter h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 800; }
.newsletter p { color: var(--text-soft); max-width: 520px; margin: 14px auto 24px; }
.news-form { display: flex; gap: 10px; max-width: 480px; margin: 0 auto; flex-wrap: wrap; justify-content: center; }
.news-form input {
  flex: 1 1 240px; min-height: 50px; padding: 0 18px; border-radius: var(--radius-pill);
  border: 1px solid var(--border); background: var(--surface-solid); color: var(--text); font: inherit; font-size: .96rem;
}
.news-form input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.news-form input[aria-invalid="true"] { border-color: var(--accent-2); }
.news-msg { margin-top: 14px; font-size: .88rem; min-height: 1.2em; }
.news-msg.err { color: var(--accent-2); }
.news-msg.ok { color: var(--text-soft); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .edu-grid { grid-template-columns: 1fr; }
  .dev-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .blog-hero-grid { grid-template-columns: 1fr; }
  .blog-visual { display: block; max-width: 400px; margin: 4px auto 0; }
  .blog-visual .waves { height: 120px; }
  .featured { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .article-grid { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .dev-grid { grid-template-columns: repeat(2, 1fr); }
  .sports-grid { grid-template-columns: 1fr; }
  .news-form { flex-direction: column; }
  .news-form .btn { width: 100%; }
}