/* ===== Quầy thuốc Khánh Hiền — style chung cho blog & bài viết ===== */
:root{
  --green:#0f9d70; --green-dark:#0b7a57; --green-soft:#e7f7f0;
  --ink:#183028; --muted:#5b6f68; --line:#e3ede9;
  --bg:#f6faf8; --white:#fff; --accent:#f4a935; --zalo:#0068ff;
  --shadow:0 10px 30px rgba(15,157,112,.10); --radius:20px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Be Vietnam Pro',system-ui,-apple-system,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 20px}
.nowrap{white-space:nowrap}
img{max-width:100%}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(246,250,248,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:1.12rem}
.logo{width:44px;height:44px;border-radius:13px;background:linear-gradient(135deg,var(--green),var(--green-dark));display:grid;place-items:center;color:#fff;flex-shrink:0;box-shadow:var(--shadow)}
.logo svg{width:24px;height:24px}
.brand small{display:block;font-size:.72rem;font-weight:500;color:var(--muted)}
.navlinks{display:flex;gap:26px;align-items:center;font-weight:500;font-size:.95rem}
.navlinks a{color:var(--muted);transition:color .2s}
.navlinks a:hover,.navlinks a.active{color:var(--green-dark)}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:700;padding:12px 22px;border-radius:999px;transition:transform .15s,box-shadow .2s;font-size:.95rem;border:none;cursor:pointer}
.btn:hover{transform:translateY(-2px)}
.btn-call{background:var(--green);color:#fff;box-shadow:var(--shadow)}
.btn-zalo{background:var(--zalo);color:#fff}
.btn-ghost{background:var(--white);color:var(--green-dark);border:1.5px solid var(--line)}
@media(max-width:760px){.navlinks{display:none}}

/* page head */
.page-head{padding:48px 0 26px;text-align:center}
.eyebrow{display:inline-block;font-weight:700;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;color:var(--green-dark);background:var(--green-soft);padding:6px 14px;border-radius:999px;margin-bottom:16px}
.page-head h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.page-head p{color:var(--muted);max-width:620px;margin:14px auto 0;font-size:1.05rem}

/* search + filter */
.toolbar{max-width:760px;margin:26px auto 0;display:flex;flex-direction:column;gap:16px}
.search{position:relative}
.search svg{position:absolute;left:18px;top:50%;transform:translateY(-50%);width:20px;height:20px;color:var(--muted)}
.search input{width:100%;padding:15px 18px 15px 50px;border:1.5px solid var(--line);border-radius:999px;font-family:inherit;font-size:1rem;background:#fff;color:var(--ink);box-shadow:var(--shadow);transition:border-color .2s}
.search input:focus{outline:none;border-color:var(--green)}
.chips{display:flex;gap:9px;flex-wrap:wrap;justify-content:center}
.chip{padding:8px 16px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--muted);font-size:.88rem;font-weight:600;cursor:pointer;transition:.18s;font-family:inherit}
.chip:hover{border-color:var(--green)}
.chip.active{background:var(--green);color:#fff;border-color:var(--green)}
.count{text-align:center;color:var(--muted);font-size:.9rem;margin:22px 0 0}

/* article grid */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;padding:30px 0 20px}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.grid{grid-template-columns:1fr}}
.acard{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.acard:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.acard .tag{align-self:flex-start;font-size:.72rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--green-dark);background:var(--green-soft);padding:5px 11px;border-radius:999px;margin-bottom:12px}
.acard.que .tag{color:#b8611a;background:#fdf0dd}
.acard h3{font-size:1.08rem;font-weight:700;line-height:1.38;margin-bottom:8px}
.acard p{color:var(--muted);font-size:.92rem;flex:1}
.acard .more{margin-top:14px;font-weight:700;color:var(--green-dark);font-size:.9rem}
.no-result{text-align:center;color:var(--muted);padding:50px 0;display:none}
.no-result.show{display:block}

/* article page */
.breadcrumb{padding:26px 0 0;font-size:.88rem;color:var(--muted)}
.breadcrumb a:hover{color:var(--green-dark)}
article.post{padding:14px 0 40px}
article.post .tag{display:inline-block;font-size:.74rem;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--green-dark);background:var(--green-soft);padding:6px 13px;border-radius:999px;margin-bottom:16px}
article.post h1{font-size:clamp(1.7rem,3.6vw,2.35rem);font-weight:800;line-height:1.25;letter-spacing:-.02em;margin-bottom:14px}
.post-meta{color:var(--muted);font-size:.9rem;margin-bottom:8px;display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.post-meta svg{width:16px;height:16px;vertical-align:-3px;margin-right:4px;color:var(--green)}
.post-body{font-size:1.06rem;color:#26413a}
.post-body p{margin:16px 0}
.post-body h2{font-size:1.35rem;font-weight:800;margin:32px 0 8px;color:var(--ink);letter-spacing:-.01em}
.post-body h3{font-size:1.12rem;font-weight:700;margin:22px 0 6px}
.post-body ul,.post-body ol{margin:12px 0 12px 4px;padding-left:24px}
.post-body li{margin:7px 0}
.post-body strong{color:var(--ink)}
.callout{background:#fff8ec;border:1px solid #f6e3c0;border-left:4px solid var(--accent);border-radius:12px;padding:16px 20px;margin:22px 0;color:#7a6538;font-size:.98rem}
.callout b{color:#5c4a24}
.callout.warn{background:#fdecec;border-color:#f3c2c2;border-left-color:#d94848;color:#8a3a3a}
.callout.warn b{color:#7a2a2a}
.callout.tip{background:var(--green-soft);border-color:#bfe6d6;border-left-color:var(--green);color:#1c5a45}
.callout.tip b{color:#0b7a57}

/* CTA box in article */
.post-cta{background:linear-gradient(135deg,var(--green-dark),var(--green));border-radius:22px;padding:34px 28px;color:#fff;text-align:center;margin:40px 0 10px;box-shadow:var(--shadow)}
.post-cta h3{color:#fff;font-size:1.3rem;font-weight:800;margin-bottom:8px}
.post-cta p{opacity:.94;margin-bottom:20px;max-width:460px;margin-left:auto;margin-right:auto}
.post-cta .btn-call{background:#fff;color:var(--green-dark)}
.post-cta .btn-zalo{background:#fff;color:var(--zalo)}
.post-cta .row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.post-cta .phone{font-size:1.4rem;font-weight:800;margin-top:16px}

/* related */
.related{padding:36px 0}
.related h2{font-size:1.3rem;font-weight:800;margin-bottom:18px}
.rel-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:760px){.rel-list{grid-template-columns:1fr}}
.rel-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-weight:600;font-size:.95rem;transition:.2s}
.rel-item:hover{border-color:var(--green);transform:translateY(-2px)}
.rel-item small{display:block;color:var(--muted);font-weight:500;font-size:.78rem;margin-bottom:5px;text-transform:uppercase;letter-spacing:.04em}

/* disclaimer */
.disc{background:#fff8ec;border:1px solid #f6e3c0;border-radius:16px;padding:20px 22px;display:flex;gap:14px;margin:30px 0}
.disc svg{width:24px;height:24px;color:var(--accent);flex-shrink:0}
.disc p{font-size:.9rem;color:#7a6538}
.disc b{color:#5c4a24}

/* footer */
footer{background:var(--ink);color:#cfe0da;padding:44px 0 24px;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:34px;margin-bottom:30px}
footer .brand{color:#fff}
footer .brand small{color:#9fb6ac}
footer p{color:#9fb6ac;font-size:.9rem;margin-top:12px;max-width:320px}
footer h5{color:#fff;font-weight:700;margin-bottom:12px;font-size:.98rem}
footer ul{list-style:none}
footer ul li{margin-bottom:8px}
footer ul a,footer ul span{color:#9fb6ac;font-size:.9rem}
footer ul a:hover{color:#fff}
.foot-bottom{border-top:1px solid #2c463d;padding-top:18px;text-align:center;color:#8aa298;font-size:.84rem}
@media(max-width:760px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.foot-grid{grid-template-columns:1fr}}

/* floating */
.fab{position:fixed;right:18px;bottom:18px;z-index:80;display:flex;flex-direction:column;gap:12px}
.fab a{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;box-shadow:0 8px 22px rgba(0,0,0,.22);color:#fff;position:relative}
.fab .f-call{background:var(--green)}
.fab .f-zalo{background:var(--zalo);font-weight:800;font-size:.72rem}
.fab a svg{width:25px;height:25px}
.fab a::after{content:'';position:absolute;inset:0;border-radius:50%;border:2px solid currentColor;opacity:.5;animation:ring 1.8s infinite}
@keyframes ring{0%{transform:scale(1);opacity:.5}100%{transform:scale(1.5);opacity:0}}