/* ===== DeepDebug — shared blog stylesheet (listing + articles) ===== */
:root{
  --bg:#fff;--bg-soft:#f6f8fb;--text:#0f1b2d;--muted:#5b6b80;--line:#e3e9f1;
  --accent:#1f6feb;--accent-dark:#1856bf;--accent-soft:#eaf2ff;
  --warn-bg:#fff7e6;--warn-line:#ffe2a8;--warn-tx:#7a5a00;
  --radius:14px;--shadow:0 1px 3px rgba(16,30,54,.06),0 8px 24px rgba(16,30,54,.06);
  --maxw-art:760px;--maxw:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.7}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.wrap.art{max-width:var(--maxw-art)}

/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.12rem}
.brand:hover{text-decoration:none}
.logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--accent),#3aa0ff);
  display:grid;place-items:center;color:#fff;font-weight:900;font-family:ui-monospace,Menlo,Consolas,monospace}
.brand b{color:var(--accent)}
.nav-links{display:flex;gap:24px;font-size:.94rem;color:var(--muted)}
.nav-links a{color:var(--muted)}.nav-links a:hover{color:var(--text);text-decoration:none}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 12px;font-size:.82rem;color:var(--muted);cursor:pointer;font-weight:600;text-decoration:none}
.lang:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--accent);color:#fff;border:0;cursor:pointer;
  padding:9px 18px;border-radius:999px;font-weight:600;font-size:.92rem}
.btn:hover{background:var(--accent-dark);text-decoration:none;color:#fff}
@media(max-width:760px){.nav-links{display:none}}

/* ===== Listing page ===== */
.hero{padding:56px 0 30px;background:radial-gradient(800px 320px at 75% -20%,var(--accent-soft),transparent 60%)}
.hero h1{font-size:clamp(1.8rem,4vw,2.6rem);letter-spacing:-.01em;margin:0 0 .3em}
.lead{color:var(--muted);font-size:1.1rem;max-width:60ch}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 8px}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;font-size:.84rem;color:var(--muted);cursor:pointer;font-weight:600}
.chip.active,.chip:hover{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:24px 0 60px}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.grid{grid-template-columns:1fr}}
.card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);transition:.15s}
.card:hover{transform:translateY(-3px);border-color:#cdd9ea;text-decoration:none}
.card h2{font-size:1.05rem;margin:0 0 .3em;letter-spacing:-.01em;color:var(--text)}
.cat{font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--accent);margin-bottom:10px}
.card p{color:var(--muted);font-size:.92rem;margin:.3rem 0 0;flex:1}
.meta{margin-top:16px;font-size:.8rem;color:#90a0b6;display:flex;justify-content:space-between;align-items:center}
.soon{opacity:.62}
.read{color:var(--accent);font-weight:600;font-size:.85rem}

/* ===== Article page ===== */
article{padding:40px 0 20px}
.crumb{font-size:.85rem;color:var(--muted);margin-bottom:18px}
.cat-pill{display:inline-block;font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;
  color:var(--accent);background:var(--accent-soft);padding:4px 12px;border-radius:999px;margin-bottom:14px}
article h1{font-size:clamp(1.7rem,4vw,2.4rem);line-height:1.2;letter-spacing:-.01em;margin:0 0 .4em}
.artmeta{color:var(--muted);font-size:.9rem;border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:8px}
article{font-size:1.05rem}
.intro{font-size:1.15rem;color:#33445c}
article h2{font-size:1.4rem;letter-spacing:-.01em;margin:1.8em 0 .5em}
article h3{font-size:1.12rem;margin:1.4em 0 .3em}
article p{margin:.8em 0}
article ul,article ol{padding-left:1.3em}
article li{margin:.4em 0}
.callout{background:var(--bg-soft);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:16px 18px;margin:1.4em 0}
.callout b{color:var(--text)}
.steps{counter-reset:s;list-style:none;padding:0;margin:1.2em 0}
.steps>li{position:relative;padding:14px 16px 14px 52px;border:1px solid var(--line);border-radius:12px;margin:10px 0;background:#fff;box-shadow:var(--shadow)}
.steps>li::before{counter-increment:s;content:counter(s);position:absolute;left:14px;top:14px;width:26px;height:26px;
  background:var(--accent);color:#fff;border-radius:999px;display:grid;place-items:center;font-weight:700;font-size:.85rem}
.steps>li b{display:block;margin-bottom:2px}
.warn{background:var(--warn-bg);border:1px solid var(--warn-line);color:var(--warn-tx);border-radius:10px;padding:14px 16px;margin:1.4em 0;font-size:.96rem}
code{background:#eef2f8;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9em}

/* CTA box */
.cta{background:linear-gradient(135deg,#0f1b2d,#16335e);color:#fff;border-radius:16px;padding:28px;margin:2.4em 0}
.cta h3{color:#fff;margin:0 0 .3em;font-size:1.25rem}
.cta p{color:#c6d2e4;margin:.2em 0 1em}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn.zalo{background:#0068ff}.btn.zalo:hover{background:#0057d6}
.btn.mail{background:#fff;color:#0f1b2d}.btn.mail:hover{background:#e9eef6;color:#0f1b2d}
.btn.lg{padding:12px 22px;font-size:.98rem}

.related{border-top:1px solid var(--line);margin-top:30px;padding:24px 0 0}
.related h3{margin-top:0}
.rel-list a{display:block;padding:8px 0;border-bottom:1px solid var(--line)}

footer{padding:32px 0;border-top:1px solid var(--line);color:var(--muted);font-size:.86rem;text-align:center;margin-top:30px}
footer .brand{justify-content:center;margin-bottom:8px}