/* ══ blog-ca-nhan — Shared Styles ══
   Màu accent: Green #1a6b52
   Font: DM Sans · Bootstrap 5.3.3
*/
:root {
  --bg:#faf9f7; --surface:#fff; --dark:#0c0b09; --dark2:#141210;
  --border:#e8e5df; --border-light:#f0ede8;
  --text:#1a1917; --text-2:#6b6760; --text-3:#a09d97;
  --accent:#1a6b52; --accent-h:#155a44; --accent-light:#e8f4ef; --accent-mid:#2d9b73;
  --warm:#f5f0e8; --warm2:#ede8df; --danger:#e24b4a;
  --sans:'DM Sans',sans-serif;
  --bs-body-font-family:var(--sans); --bs-body-bg:var(--bg);
  --bs-body-color:var(--text); --bs-border-color:var(--border);
}
html { scroll-behavior:smooth; }
body { font-family:var(--sans); background:var(--bg); color:var(--text); overflow-x:hidden; -webkit-font-smoothing:antialiased; }
::-webkit-scrollbar { width:4px; }
::-webkit-scrollbar-thumb { background:var(--warm2); border-radius:4px; }
img { display:block; }
.wd-container { max-width:1100px; margin:0 auto; padding:0 clamp(20px,5vw,80px); }
.sec-pad { padding:clamp(64px,9vw,110px) 0; }

/* Reveal */
.reveal { opacity:0; transform:translateY(24px); transition:opacity .65s cubic-bezier(.16,1,.3,1),transform .65s cubic-bezier(.16,1,.3,1); }
.reveal.visible { opacity:1; transform:none; }
.reveal-d1 { transition-delay:.08s; } .reveal-d2 { transition-delay:.16s; } .reveal-d3 { transition-delay:.24s; }

/* Nav */
#nav { position:fixed;top:0;left:0;right:0;z-index:500;background:rgba(250,249,247,.92);backdrop-filter:blur(16px);border-bottom:1px solid var(--border-light);transition:all .3s; }
.nav-inner { height:60px;display:flex;align-items:center;justify-content:space-between; }
.logo { font-size:17px;font-weight:600;color:var(--text);text-decoration:none;letter-spacing:-.5px; }
.logo span { color:var(--accent); }
.nav-links { display:flex;gap:24px; }
.nav-links a { font-size:13.5px;color:var(--text-2);text-decoration:none;transition:color .2s; }
.nav-links a:hover,.nav-links a.active { color:var(--text); }
.nav-search { display:flex;align-items:center;gap:10px; }
.nav-search input { font-family:var(--sans);font-size:13px;border:1px solid var(--border);border-radius:7px;padding:6px 12px;background:var(--warm);color:var(--text);outline:none;width:160px;transition:all .2s; }
.nav-search input:focus { border-color:var(--accent);width:200px; }
.nav-hamburger { display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px;border:none;background:transparent; }
.nav-hamburger span { display:block;width:22px;height:2px;background:var(--text-2);border-radius:2px;transition:all .3s; }
.nav-hamburger.open span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity:0; }
.nav-hamburger.open span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }
.nav-mobile { position:fixed;inset:0;background:rgba(250,249,247,.98);backdrop-filter:blur(12px);z-index:490;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:24px;opacity:0;pointer-events:none;transition:opacity .3s; }
.nav-mobile.open { opacity:1;pointer-events:auto; }
.nav-mobile a { font-size:20px;font-weight:500;color:var(--text-2);text-decoration:none; }
.nav-mobile a:hover { color:var(--text); }
@media(max-width:768px) { .nav-links,.nav-search { display:none; } .nav-hamburger { display:flex; } }

/* Category badge */
.cat-badge { display:inline-block;font-size:11px;font-weight:500;color:var(--accent);background:var(--accent-light);padding:4px 10px;border-radius:5px;text-decoration:none;transition:all .15s; }
.cat-badge:hover { background:var(--accent);color:#fff; }

/* Post card */
.post-card { background:var(--surface);border:1px solid var(--border);border-radius:14px;overflow:hidden;transition:transform .28s cubic-bezier(.16,1,.3,1),box-shadow .28s,border-color .2s;height:100%; }
.post-card:hover { transform:translateY(-5px);box-shadow:0 18px 48px rgba(0,0,0,.08);border-color:var(--border-light); }
.post-thumb { width:100%;aspect-ratio:16/9;object-fit:cover;display:block;transition:transform .5s; }
.post-card:hover .post-thumb { transform:scale(1.04); }
.post-body { padding:20px 22px; }
.post-meta { display:flex;align-items:center;gap:10px;margin-bottom:10px;flex-wrap:wrap; }
.post-date { font-size:11.5px;color:var(--text-3);font-weight:300; }
.post-read { font-size:11.5px;color:var(--text-3);font-weight:300; }
.post-title { font-size:16px;font-weight:600;color:var(--text);line-height:1.4;letter-spacing:-.3px;margin-bottom:8px;text-decoration:none;display:block; }
.post-title:hover { color:var(--accent); }
.post-excerpt { font-size:13px;font-weight:300;color:var(--text-2);line-height:1.7;margin-bottom:14px; }
.post-footer { display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px solid var(--border-light); }
.post-author { display:flex;align-items:center;gap:8px; }
.post-av { width:28px;height:28px;border-radius:50%;object-fit:cover; }
.post-author-name { font-size:12px;font-weight:500;color:var(--text-2); }
.post-more { font-size:12px;font-weight:500;color:var(--accent);text-decoration:none; }
.post-more:hover { color:var(--accent-h); }

/* Featured post */
.feat-post { background:var(--dark2);border-radius:16px;overflow:hidden;position:relative; }
.feat-img { width:100%;aspect-ratio:21/9;object-fit:cover;opacity:.55; }
.feat-overlay { position:absolute;inset:0;background:linear-gradient(to top,rgba(12,11,9,.95) 0%,rgba(12,11,9,.3) 60%,transparent 100%); }
.feat-body { position:absolute;bottom:0;left:0;right:0;padding:clamp(24px,4vw,40px); }
.feat-cat { display:inline-flex;font-size:11px;font-weight:500;color:#4ade80;text-transform:uppercase;letter-spacing:1px;margin-bottom:12px; }
.feat-title { font-size:clamp(20px,3vw,34px);font-weight:600;color:#fff;line-height:1.2;letter-spacing:-.5px;margin-bottom:12px;max-width:640px; }
.feat-meta { font-size:12px;color:rgba(255,255,255,.4);display:flex;gap:14px; }

/* Sidebar */
.sidebar-widget { background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:20px 22px;margin-bottom:20px; }
.sw-title { font-size:12px;font-weight:600;color:var(--text-3);text-transform:uppercase;letter-spacing:.8px;margin-bottom:16px; }

/* Tag cloud */
.tag-cloud { display:flex;flex-wrap:wrap;gap:6px; }
.tag { font-size:12px;color:var(--text-2);background:var(--warm);border:1px solid var(--border);padding:5px 12px;border-radius:6px;text-decoration:none;transition:all .15s; }
.tag:hover { background:var(--accent-light);color:var(--accent);border-color:var(--accent-light); }

/* Buttons */
.btn-accent { font-size:14px;font-weight:500;background:var(--accent);color:#fff;padding:11px 24px;border-radius:9px;border:none;cursor:pointer;font-family:var(--sans);transition:all .2s;text-decoration:none;display:inline-block; }
.btn-accent:hover { background:var(--accent-h);transform:translateY(-1px);color:#fff; }

/* Footer */
footer { background:var(--dark); }
.ft-logo { font-size:18px;font-weight:600;color:#fff;letter-spacing:-.5px;margin-bottom:10px; }
.ft-logo span { color:#4ade80; }
.ft-desc { font-size:13px;font-weight:300;color:rgba(255,255,255,.3);line-height:1.7;max-width:240px; }
.ft-col-title { font-size:11px;font-weight:600;color:rgba(255,255,255,.4);text-transform:uppercase;letter-spacing:.8px;margin-bottom:14px; }
.ft-links { display:flex;flex-direction:column;gap:9px; }
.ft-links a { font-size:13px;font-weight:300;color:rgba(255,255,255,.3);text-decoration:none;transition:color .15s; }
.ft-links a:hover { color:rgba(255,255,255,.7); }
.ft-bottom { background:#080706;border-top:1px solid rgba(255,255,255,.04); }
.ft-copy { font-size:12px;font-weight:300;color:rgba(255,255,255,.18); }

/* Zalo float */
.zf { position:fixed;bottom:26px;right:26px;z-index:400;display:flex;flex-direction:column;align-items:flex-end;gap:8px; }
.zf-tip { font-size:12px;background:var(--dark);color:rgba(255,255,255,.75);padding:6px 12px;border-radius:6px;opacity:0;transform:translateX(6px);transition:all .2s;pointer-events:none;white-space:nowrap;border:1px solid rgba(255,255,255,.08); }
.zf:hover .zf-tip { opacity:1;transform:none; }
.zf-btn { width:48px;height:48px;border-radius:50%;background:#0068FF;display:flex;align-items:center;justify-content:center;border:none;font-size:22px;box-shadow:0 4px 18px rgba(0,104,255,.38);transition:transform .2s;cursor:pointer; }
.zf-btn:hover { transform:scale(1.09); }