:root{
  --bg:#f6f8fb;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e5e7eb;

  --brand:#0f766e;
  --brand2:#2563eb;
  --orange:#f97316;
  --purple:#7c3aed;

  --radius:16px;
  --shadow:0 10px 30px rgba(15, 23, 42, 0.08);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg)}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 18px}

/* Top Nav */
.topbar{
  position:sticky;top:0;z-index:50;
  background:#fff;border-bottom:1px solid var(--border);
}
.navwrap{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800}
.brand-badge{
  width:34px;height:34px;border-radius:10px;
  background:rgba(15,118,110,.12);
  display:grid;place-items:center;color:var(--brand);font-weight:900;
}
.navlinks{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:flex-end}
.navlinks a{
  font-size:14px;padding:8px 10px;border-radius:999px;
  border:1px solid transparent;color:#334155;
}
.navlinks a:hover{background:#f1f5f9}
.navlinks a.active{
  background:rgba(15,118,110,.10);
  border-color:rgba(15,118,110,.25);
  color:var(--brand);
  font-weight:700;
}

/* Hero */
.hero{
  padding:46px 0;
  background:linear-gradient(90deg, rgba(15,118,110,1), rgba(14,116,144,1));
  color:#fff;
}
.hero h1{margin:0 0 10px 0;font-size:38px;letter-spacing:-.02em}
.hero p{margin:0;color:rgba(255,255,255,.9);line-height:1.6;max-width:820px}
.hero .pill{
  display:inline-flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.22);
  padding:8px 12px;border-radius:999px;
  font-size:13px;font-weight:700;margin-bottom:14px;
}

/* Section + Cards */
.section{padding:26px 0}
.card{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--radius);box-shadow:var(--shadow);
}
.card-pad{padding:22px}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
@media(max-width:900px){.grid-3{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.grid-2,.grid-3{grid-template-columns:1fr}}

/* Controls */
.label{font-size:13px;color:var(--muted);margin-bottom:6px}
.input, .textarea, .select{
  width:100%;padding:12px 12px;border-radius:12px;
  border:1px solid var(--border);outline:none;background:#fff;
}
.textarea{min-height:120px;resize:vertical}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row > *{flex:1}

/* Chips */
.chips{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  border:1px solid var(--border);
  background:#fff;border-radius:14px;
  padding:10px 12px;display:flex;gap:10px;align-items:center;
  cursor:pointer;user-select:none;
}
.chip input{accent-color:var(--brand)}
.chip:hover{background:#f8fafc}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:12px 14px;border-radius:14px;
  border:1px solid transparent;cursor:pointer;
  font-weight:800;font-size:14px;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{filter:brightness(.95)}
.btn-ghost{background:#fff;border-color:var(--border)}
.btn-ghost:hover{background:#f8fafc}
.btn-wide{width:100%;padding:14px}

/* Tags */
.tag{font-size:12px;padding:6px 10px;border-radius:999px;border:1px solid var(--border);background:#fff;color:#334155;font-weight:700}
.tag.bs{background:rgba(16,185,129,.10);border-color:rgba(16,185,129,.25);color:#065f46}
.tag.ch{background:rgba(59,130,246,.10);border-color:rgba(59,130,246,.25);color:#1d4ed8}

/* Page headings */
.h2{margin:0 0 10px 0;font-size:22px}
.small{color:var(--muted);font-size:14px;line-height:1.6}

/* Footer */
.footer{
  margin-top:30px;padding:26px 0;text-align:center;color:var(--muted);
  border-top:1px solid var(--border);background:#fff;
}
.footer a{color:var(--brand);font-weight:700}
.footer-links{margin-top:10px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.footer-links a{color:#334155;font-weight:600}

/* Planner columns */
.week{
  display:grid;gap:12px;
  grid-template-columns:repeat(7,minmax(0,1fr));
}
@media(max-width:1100px){.week{grid-template-columns:repeat(3,1fr)}}
@media(max-width:700px){.week{grid-template-columns:1fr}}
.day{
  border:1px solid var(--border);
  background:#fff;border-radius:16px;padding:12px;
}
.day h3{margin:0 0 8px 0;font-size:14px}
.meal{
  border:1px solid var(--border);border-radius:14px;padding:10px;margin-bottom:10px;
}
.meal .meal-title{font-weight:800;font-size:13px;margin-bottom:6px}
.meal .meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.meal .swap{width:100%}

/* Tracker */
.progressbar{height:10px;border-radius:999px;background:#e2e8f0;overflow:hidden}
.progressbar > div{height:100%;background:var(--brand);width:0%}
.checklist .item{
  display:flex;align-items:center;justify-content:space-between;
  border:1px solid var(--border);border-radius:14px;padding:12px;margin-bottom:10px;background:#fff;
}
.checklist label{display:flex;gap:10px;align-items:center;font-weight:700}
.mood{display:flex;gap:10px;flex-wrap:wrap}
.mood button{
  border:1px solid var(--border);background:#fff;border-radius:14px;
  padding:12px 14px;cursor:pointer;font-weight:800;
}
.mood button.active{border-color:rgba(15,118,110,.35);background:rgba(15,118,110,.10);color:var(--brand)}
.water{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.water button{
  border:1px solid var(--border);background:#fff;border-radius:14px;
  padding:12px;cursor:pointer;font-weight:900;
}
.water button.active{background:rgba(37,99,235,.10);border-color:rgba(37,99,235,.30);color:var(--brand2)}