/* ============================================================
 * Signa — ระบบภาษีป้ายท้องถิ่นอัจฉริยะ
 * ธีมร่วม: Light · Teal/Emerald · Slate  (ออกแบบใหม่ ไม่ซ้ำของเดิม)
 * เปลี่ยนชื่อแบรนด์ที่เดียว: .brand ในแต่ละหน้า / manifest
 * ============================================================ */
:root{
  --bg:#eef2f6; --bg2:#e3e9f0;
  --surface:#ffffff; --surface-2:#f7f9fb;
  --ink:#0f2230; --ink-soft:#43596b; --muted:#7b8a99;
  --line:#e2e8ef;
  --brand:#0d9488; --brand-d:#0b7c71; --brand-l:#14b8a6;
  --brand-soft:#d7f2ee;
  --green:#16a34a; --amber:#d97706; --rose:#e11d48; --sky:#0284c7;
  --radius:18px; --radius-sm:12px;
  --shadow:0 8px 24px rgba(15,34,48,.08);
  --shadow-sm:0 2px 8px rgba(15,34,48,.06);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font-family:"Sarabun","Segoe UI",Tahoma,sans-serif;line-height:1.55;min-height:100vh;
}
h1,h2,h3{margin:0 0 .35em;letter-spacing:.2px}
a{color:var(--brand-d)}

/* แบรนด์ */
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;font-size:22px;color:var(--ink);letter-spacing:.3px}
.brand .mark{
  width:30px;height:30px;border-radius:9px;display:inline-grid;place-items:center;
  background:linear-gradient(135deg,var(--brand-l),var(--brand-d));color:#fff;font-size:17px;
  box-shadow:0 4px 10px rgba(13,148,136,.35)
}
.brand small{font-weight:600;font-size:12px;color:var(--muted);letter-spacing:0}

.muted{color:var(--muted)}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;margin-bottom:16px;box-shadow:var(--shadow-sm)}

/* หัวข้อแบบ step (เลขในวงกลม) */
.step-head{display:flex;align-items:center;gap:10px;margin:0 0 12px;font-weight:700;font-size:15px}
.step-head .n{width:26px;height:26px;border-radius:50%;background:var(--brand-soft);color:var(--brand-d);
  display:grid;place-items:center;font-size:14px;font-weight:800;flex:none}

label{display:block;font-size:13px;color:var(--ink-soft);margin:12px 0 5px;font-weight:600}
input,select,textarea{
  width:100%;padding:13px 14px;border-radius:var(--radius-sm);border:1.5px solid var(--line);
  background:var(--surface-2);color:var(--ink);font-size:16px;font-family:inherit;transition:.15s;
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);background:#fff;
  box-shadow:0 0 0 4px var(--brand-soft)}
select{appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='14' height='14' fill='%237b8a99' viewBox='0 0 16 16'><path d='M4 6l4 4 4-4'/></svg>");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:none;
  border-radius:var(--radius-sm);padding:14px 18px;font-size:16px;font-weight:700;cursor:pointer;
  background:linear-gradient(135deg,var(--brand-l),var(--brand-d));color:#fff;width:100%;
  box-shadow:0 6px 16px rgba(13,148,136,.28);transition:.15s}
.btn:active{transform:translateY(1px)}
.btn:disabled{opacity:.6}
.btn.secondary{background:#fff;color:var(--ink);border:1.5px solid var(--line);box-shadow:none}
.btn.ghost{background:transparent;color:var(--brand-d);border:1.5px solid var(--brand-soft);box-shadow:none}

.row{display:flex;gap:12px}.row>*{flex:1}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

.pill{display:inline-block;padding:3px 11px;border-radius:999px;font-size:12px;font-weight:700}
.pill.new{background:#fef3c7;color:#92400e}
.pill.confirmed{background:#dcfce7;color:#15803d}
.pill.pending{background:#e5edf3;color:#475b6b}

/* helper / คำเตือน */
.note{font-size:12px;color:var(--muted)}
.hint{background:var(--surface-2);border:1px dashed var(--line);border-radius:var(--radius-sm);padding:13px;margin-top:10px}
.warn{background:#fff7ed;border:1px solid #fed7aa;color:#9a3412;padding:11px 13px;border-radius:var(--radius-sm);font-size:13px}
.chk{display:flex;align-items:center;gap:9px;margin:8px 0}
.chk input{width:auto;margin:0}
.chk label{margin:0}
summary{cursor:pointer;color:var(--brand-d);font-weight:600;list-style:none}
summary::-webkit-details-marker{display:none}
summary::before{content:"+ ";font-weight:800}
details[open] summary::before{content:"– "}