/* ===== Nha Khoa Như Tâm — style chung ===== */
:root{
  --green-900:#14532d;
  --green-800:#166534;
  --green-700:#15803d;
  --green-600:#16a34a;
  --green-500:#22c55e;
  --green-100:#dcfce7;
  --green-50:#f0fdf4;
  --cream:#fcfbf5;
  --ink:#1f2937;
  --ink-soft:#4b5563;
  --line:#e5e7eb;
  --white:#ffffff;
  --shadow:0 6px 24px rgba(20,83,45,.08);
  --radius:16px;
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
  color:var(--ink);
  background:var(--cream);
  line-height:1.7;
  font-size:17px;
}
a{color:var(--green-700);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}

/* ===== Header ===== */
.site-header{
  background:var(--white);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:40;
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--green-800);font-size:20px}
.brand .logo{
  width:42px;height:42px;border-radius:50%;
  background:linear-gradient(135deg,var(--green-600),var(--green-800));
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;flex:0 0 auto;
}
.brand small{display:block;font-weight:500;color:var(--ink-soft);font-size:12px;letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:24px}
.nav a{color:var(--ink);font-weight:600;font-size:15px}
.nav a:hover{color:var(--green-700);text-decoration:none}
.btn-call{
  background:var(--green-600);color:#fff !important;padding:10px 18px;border-radius:999px;
  font-weight:700;font-size:15px;white-space:nowrap;
}
.btn-call:hover{background:var(--green-700);text-decoration:none}
.menu-toggle{display:none;background:none;border:0;font-size:26px;color:var(--green-800);cursor:pointer}

/* ===== Hero ===== */
.hero{
  background:
    radial-gradient(1200px 400px at 80% -10%,var(--green-100),transparent),
    linear-gradient(180deg,var(--green-50),var(--cream));
  padding:64px 0 56px;
}
.hero h1{font-size:42px;line-height:1.2;margin:0 0 16px;color:var(--green-900);font-weight:800}
.hero .slogan{font-size:20px;color:var(--ink-soft);max-width:640px;margin:0 0 28px}
.hero .cta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.btn{
  display:inline-block;padding:14px 26px;border-radius:999px;font-weight:700;font-size:17px;
}
.btn-primary{background:var(--green-600);color:#fff}
.btn-primary:hover{background:var(--green-700);text-decoration:none}
.btn-ghost{background:#fff;color:var(--green-800);border:2px solid var(--green-600)}
.btn-ghost:hover{background:var(--green-50);text-decoration:none}
.hero .badges{margin-top:26px;display:flex;gap:22px;flex-wrap:wrap;color:var(--green-800);font-weight:600;font-size:15px}
.hero .badges span{display:flex;align-items:center;gap:8px}

/* ===== Section ===== */
section{padding:56px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 40px}
.section-head h2{font-size:32px;color:var(--green-900);margin:0 0 12px;font-weight:800}
.section-head p{color:var(--ink-soft);margin:0;font-size:18px}
.eyebrow{color:var(--green-600);font-weight:700;letter-spacing:1px;text-transform:uppercase;font-size:13px;margin-bottom:10px}

/* ===== Services grid ===== */
.grid{display:grid;gap:22px}
.services{grid-template-columns:repeat(3,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);transition:transform .15s ease,box-shadow .15s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(20,83,45,.13)}
.card .ic{
  width:54px;height:54px;border-radius:14px;background:var(--green-100);color:var(--green-700);
  display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:16px;
}
.card h3{margin:0 0 8px;font-size:20px;color:var(--green-900)}
.card p{margin:0;color:var(--ink-soft);font-size:15.5px}

/* ===== Why us ===== */
.why{background:var(--green-900);color:#eafff1}
.why .section-head h2{color:#fff}
.why .section-head p{color:#bbf7d0}
.why-grid{grid-template-columns:repeat(4,1fr)}
.why .item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:24px}
.why .item .ic{font-size:30px;margin-bottom:12px}
.why .item h3{margin:0 0 8px;font-size:18px;color:#fff}
.why .item p{margin:0;color:#c9f5d8;font-size:15px}

/* ===== Articles list (home) ===== */
.articles{grid-template-columns:repeat(3,1fr)}
.post-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .15s ease;
}
.post-card:hover{transform:translateY(-4px)}
.post-card .ph{
  height:120px;background:linear-gradient(135deg,var(--green-100),var(--green-50));
  display:flex;align-items:center;justify-content:center;font-size:46px;
}
.post-card .body{padding:22px;display:flex;flex-direction:column;flex:1}
.tag{
  align-self:flex-start;background:var(--green-100);color:var(--green-800);font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:999px;margin-bottom:12px;
}
.post-card h3{margin:0 0 10px;font-size:18.5px;color:var(--green-900);line-height:1.35}
.post-card h3 a{color:inherit}
.post-card h3 a:hover{color:var(--green-700);text-decoration:none}
.post-card p{margin:0 0 16px;color:var(--ink-soft);font-size:15px;flex:1}
.read-more{color:var(--green-700);font-weight:700;font-size:15px}
.center{text-align:center;margin-top:36px}

/* ===== Article page ===== */
.article-hero{background:linear-gradient(180deg,var(--green-50),var(--cream));padding:48px 0 12px}
.crumb{font-size:14px;color:var(--ink-soft);margin-bottom:16px}
.crumb a{color:var(--green-700)}
.article{max-width:760px;margin:0 auto;padding:8px 20px 60px}
.article h1{font-size:34px;line-height:1.25;color:var(--green-900);margin:0 0 16px;font-weight:800}
.article .meta{color:var(--ink-soft);font-size:15px;margin-bottom:28px;border-bottom:1px solid var(--line);padding-bottom:20px}
.article h2{font-size:24px;color:var(--green-800);margin:36px 0 14px}
.article h3{font-size:19px;color:var(--green-900);margin:26px 0 10px}
.article p{margin:0 0 18px;font-size:17.5px;color:#374151}
.article ul,.article ol{margin:0 0 20px;padding-left:24px}
.article li{margin-bottom:10px;font-size:17.5px;color:#374151}
.article blockquote{
  background:var(--green-50);border-left:4px solid var(--green-500);
  margin:24px 0;padding:16px 22px;border-radius:0 12px 12px 0;color:var(--green-900);
}
.lead{font-size:20px !important;color:var(--ink-soft) !important}
.disclaimer{
  margin-top:36px;padding:14px 18px;background:#fffbeb;border:1px solid #fde68a;border-radius:12px;
  font-size:14.5px;color:#92400e;
}
.article-cta{
  margin-top:40px;background:var(--green-900);color:#fff;border-radius:var(--radius);
  padding:32px;text-align:center;
}
.article-cta h3{color:#fff;margin:0 0 10px;font-size:22px}
.article-cta p{color:#c9f5d8;margin:0 0 20px}
.article-cta .btn-primary{background:var(--green-500)}
.article-cta .btn-primary:hover{background:var(--green-600)}
.back-row{margin:30px 0 0;text-align:center}

/* ===== Blog index ===== */
.topic-block{margin-bottom:48px}
.topic-block h2{font-size:24px;color:var(--green-800);border-bottom:2px solid var(--green-100);padding-bottom:10px;margin:0 0 24px}

/* ===== Footer ===== */
.site-footer{background:#0f2e1d;color:#cdeede;padding:48px 0 28px;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
.site-footer h4{color:#fff;margin:0 0 14px;font-size:17px}
.site-footer a{color:#a7f3c8}
.site-footer p{margin:0 0 10px;color:#bfe6cf}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding-top:18px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.draft-tag{color:#6b8f7a;font-size:12.5px}

/* ===== Responsive ===== */
@media(max-width:900px){
  .services,.articles,.why-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  body{font-size:16px}
  .nav{
    display:none;position:absolute;top:70px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:flex-start;gap:0;padding:8px 20px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  }
  .nav.open{display:flex}
  .nav a{padding:12px 0;width:100%;border-bottom:1px solid var(--green-50)}
  .btn-call{margin-top:10px}
  .menu-toggle{display:block}
  .hero{padding:44px 0 40px}
  .hero h1{font-size:31px}
  .hero .slogan{font-size:18px}
  .section-head h2{font-size:26px}
  .services,.articles,.why-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .article h1{font-size:27px}
  .article p,.article li{font-size:17px}
}