:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #2563eb;
  --warn-bg: #fef9c3;
  --warn-line: #facc15;
  --ok-bg: #dcfce7;
  --ok-ink: #14532d;
  --error: #dc2626;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --card: #1e293b;
    --ink: #f1f5f9;
    --muted: #94a3b8;
    --line: #334155;
    --primary: #3b82f6;
    --warn-bg: #422006;
    --warn-line: #a16207;
    --ok-bg: #052e16;
    --ok-ink: #86efac;
    --error: #f87171;
  }
}

* { box-sizing: border-box; }

/* ต้องมาก่อนทุก rule ที่ตั้ง display เอง และต้องมี !important
   attribute hidden ทำงานผ่าน [hidden]{display:none} ของ UA stylesheet ซึ่งลำดับ
   ต่ำกว่า CSS ที่เราเขียน — ถ้าไม่มีบรรทัดนี้ .view{display:flex} จะทับ
   ทำให้ทุกหน้าโผล่พร้อมกัน (เคยพังมาแล้ว 2026-07-28) */
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans Thai", sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-text-size-adjust: 100%;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: max(12px, env(safe-area-inset-top)) 16px 12px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

h1 { font-size: 18px; margin: 0; }

main { padding: 16px; padding-bottom: max(16px, env(safe-area-inset-bottom)); }

.view { display: flex; flex-direction: column; gap: 12px; max-width: 640px; margin: 0 auto; }
.view.center { align-items: center; text-align: center; padding-top: 48px; }

.lead { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.hint { color: var(--muted); font-size: 13px; text-align: center; line-height: 1.6; margin: 4px 0 0; }
.hint-inline { color: var(--muted); font-size: 13px; }
.error { color: var(--error); font-size: 14px; line-height: 1.6; }

.big-btn {
  display: block;
  width: 100%;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  font-family: inherit;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}

.big-btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.big-btn:disabled { opacity: .5; cursor: default; }

button.link {
  background: none;
  border: none;
  color: var(--primary);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  padding: 4px;
}

#picker { display: flex; flex-direction: column; gap: 12px; }

#view-start { align-items: center; text-align: center; padding-top: 24px; }
#view-start #picker { width: 100%; margin-top: 8px; }

#preview {
  width: 100%;
  max-height: 46vh;
  object-fit: contain;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--card);
}

.app-icon { width: 84px; height: 84px; border-radius: 20px; }
.app-name { margin: 0; font-size: 22px; }

/* ปุ่มเลือกประเภทผู้ซื้อ — นิติบุคคล / บุคคลธรรมดา */
.segmented { display: flex; gap: 8px; }

.segmented button {
  flex: 1;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}

.segmented button.on {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.consent {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  font-size: 13px;
  line-height: 1.6;
  cursor: pointer;
}

.consent input { width: 20px; height: 20px; flex: none; margin-top: 1px; }

/* กรอกรหัสเองตอนลิงก์ไม่มี ?k= ติดมา */
.key-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  text-align: left;
}

.key-form label { font-size: 12px; color: var(--muted); }

.key-form input {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 16px; /* กัน iOS ซูมอัตโนมัติตอนโฟกัส */
  width: 100%;
}

#card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 12px; color: var(--muted); }

.field input, .field textarea {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-size: 16px; /* กัน iOS ซูมอัตโนมัติตอนโฟกัส */
  width: 100%;
  resize: vertical;
}

.field.low-confidence input,
.field.low-confidence textarea {
  background: var(--warn-bg);
  border-color: var(--warn-line);
}

.banner {
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
}

.banner.ok { background: var(--ok-bg); color: var(--ok-ink); }
.banner.warn { background: var(--warn-bg); border: 1px solid var(--warn-line); }

.raw summary {
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  padding: 4px 0;
}

.raw pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 12px;
  line-height: 1.6;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  margin: 4px 0 0;
  max-height: 220px;
  overflow: auto;
}

.actions { display: flex; flex-direction: column; gap: 8px; margin-top: 8px; }

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--line);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.check {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #16a34a;
  color: #fff;
  font-size: 34px;
  display: grid;
  place-items: center;
}

.check.bad { background: var(--error); }