/* ===== AlcheMe Natural — Mobile-first, sidebar layout ===== */
:root{
  --bg:#ffffff; --ink:#0e1726; --muted:#647089;
  --brand:#0ea77a; --brand-2:#2db6ff;
  --soft:#f4fbf8; --soft-2:#eef6ff;
  --shadow:0 10px 30px rgba(10,30,60,.08);
}
*{box-sizing:border-box}
html,body{height:100%}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

/* Sidebar / Drawer */
.sidebar{
  position:fixed; left:0; top:0; bottom:0; width:270px; background:#fff;
  border-right:1px solid #e5eef6; padding:14px; overflow:auto; transform:translateX(-100%);
  transition:.25s transform ease; z-index:1000;
}
.sidebar.open{transform:translateX(0)}
@media (min-width:1024px){ .sidebar{transform:none} }

.brand{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.brand img{height:42px;width:auto;border-radius:10px}
.brand-text{line-height:1}
.brand-text .brand-name{display:block;font-size:16px;font-weight:700}
.brand-text .brand-tag{display:block;font-size:12px;color:var(--muted);margin-top:2px}

.side-nav{display:flex;flex-direction:column;gap:8px;margin:8px 0 14px}
.side-nav a{padding:9px 10px;border-radius:10px}
.side-nav a.active,.side-nav a:hover{background:var(--soft)}
.side-meta{font-size:13px;color:var(--muted)}
.side-meta a{color:inherit}

/* Top bar */
.topbar{
  position:sticky; top:0; z-index:900; background:#fff; border-bottom:1px solid #e5eef6;
  min-height:56px; display:flex; align-items:center; gap:10px; padding:8px 12px;
}
.menu-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid #e2e8f0;border-radius:10px;background:#fff}
.topbar-title{
  font-weight:800; font-size:16px; line-height:1.2;
  white-space:normal;  /* cho phép xuống dòng khi hẹp */
}
/* Đẩy topbar ra khỏi sidebar trên desktop, vẫn hiện tên đầy đủ */
@media (min-width:1024px){ .topbar{margin-left:270px;} }

/* Content area */
.content{margin-left:0; padding:16px}
@media (min-width:1024px){ .content{margin-left:270px} }

.page-narrow{max-width:880px;margin:0 auto}
.page-wide{max-width:1060px;margin:0 auto}

/* Hero */
.hero{display:grid;gap:16px;align-items:center}
.hero-card{
  background:linear-gradient(135deg,var(--soft),var(--soft-2));
  border:1px solid #e5eef6;border-radius:18px;padding:18px;box-shadow:var(--shadow)
}
.hero-text h1{font-size:32px;line-height:1.2;margin:.1em 0}
.hero-text p{color:var(--muted)}
.underline{box-shadow:inset 0 -0.3em 0 rgba(13,167,122,.2)}
.actions{display:flex;gap:10px;margin-top:12px}
.btn{display:inline-block;border-radius:12px;padding:10px 14px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{filter:brightness(0.95)}
.btn-ghost{border:1px solid #dbe3ee;color:var(--ink);background:#fff}
.btn-ghost:hover{background:#f8fbff}
.hero-img{width:100%;border-radius:12px;border:1px solid #e5eef6}
@media (min-width:980px){ .hero{grid-template-columns:1.05fr .95fr} }

/* Pills */
.pills{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0}
.pill{background:#fff;border:1px solid #e7eef7;border-radius:999px;padding:10px 14px;text-align:center;box-shadow:var(--shadow)}
.pill strong{display:block}
.pill span{font-size:12px;color:var(--muted)}
@media (max-width:700px){.pills{grid-template-columns:1fr}}

/* Zig/Zag sections */
.ziggrid{display:grid;gap:18px;margin:16px 0}
.zig,.zag{display:grid;grid-template-columns:1.1fr .9fr;gap:20px;align-items:center}
.zag{grid-template-columns:.9fr 1.1fr}
.zig-text h2{margin:.2em 0 6px}
.zig-text p{color:var(--ink)}
.zig-media img{border-radius:14px;box-shadow:var(--shadow)}
@media (max-width:980px){.zig,.zag{grid-template-columns:1fr}}

/* Gallery */
.gallery h2{margin:10px 0 12px}
.gallery-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.gallery-strip img{border-radius:12px}
@media (max-width:980px){.gallery-strip{grid-template-columns:repeat(2,1fr)}}

/* CTA */
.cta{padding:20px 0}
.cta-card{background:#0f1a2b;color:#eaf3ff;border-radius:18px;padding:20px;text-align:center;box-shadow:var(--shadow)}
.cta-card .btn-primary{background:#2db6ff}

/* About page */
.page-header h1{margin:.2em 0}
.page-header p{color:var(--muted)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:10px 0 16px}
@media (max-width:960px){.split{grid-template-columns:1fr}}
.checklist{padding-left:18px}
.checklist li{margin:.35em 0}

/* Panels */
.panels{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.panels article{background:#fff;border:1px solid #e7eef7;border-radius:14px;padding:14px;box-shadow:var(--shadow)}
@media (max-width:1000px){.panels{grid-template-columns:1fr}}

/* Programs grid */
.cards-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.card{background:#fff;border:1px solid #e7eef7;border-radius:16px;padding:16px;box-shadow:var(--shadow)}
@media (max-width:860px){.cards-grid{grid-template-columns:1fr}}

/* Photo wall */
.photo-wall{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:18px 0}
.photo-wall img{border-radius:12px}
@media (max-width:1000px){.photo-wall{grid-template-columns:repeat(3,1fr)}}
@media (max-width:640px){.photo-wall{grid-template-columns:repeat(2,1fr)}}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:960px){.contact-grid{grid-template-columns:1fr}}
.contact-form{display:grid;gap:10px}
.contact-form label{display:grid;gap:6px;font-weight:600}
.contact-form input,.contact-form textarea{font:inherit;padding:10px;border:1px solid #d7deea;border-radius:12px}
.contact-info ul{list-style:none;margin:0 0 10px;padding:0}
.contact-info li{margin:.35em 0}
.map-box{border:1px solid #e7eef7;border-radius:12px;overflow:hidden}
.map-box iframe{width:100%;height:320px;border:0}

/* Footer (sticky) */
.site-footer{margin-top:28px;background:#0d1526;color:#eaf0ff}
.site-footer a{color:#eaf0ff}
.footer-inner{max-width:1100px;margin:0 auto;padding:18px 16px;text-align:center}