* { box-sizing: border-box; }
:root {
  --bg: #f6f4ef; --panel: #fff; --ink: #2a2622; --muted: #8a827a;
  --line: #e6e0d7; --accent: #b6552e; --accent-ink: #fff; --soft: #f0ebe2;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#1b1916; --panel:#252220; --ink:#ece7df; --muted:#9c948a;
    --line:#3a352f; --accent:#d9754a; --accent-ink:#1b1916; --soft:#2f2b27; }
}
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Sarabun","Noto Sans Thai",-apple-system,Segoe UI,sans-serif;
  line-height: 1.6;
}
.hidden { display: none !important; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea {
  font-family: inherit; font-size: .95rem; color: var(--ink);
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: .55rem .7rem; width: 100%;
}
textarea { resize: vertical; }
.primary {
  background: var(--accent); color: var(--accent-ink); border: none;
  border-radius: 8px; padding: .6rem 1.1rem; font-weight: 600; font-size: .95rem;
}
.primary:disabled { opacity: .5; cursor: default; }
.link { background: none; border: none; color: var(--accent); padding: .3rem 0; font-size: .9rem; }

/* auth */
.auth-wrap { max-width: 420px; margin: 0 auto; padding: 4rem 1.2rem; text-align: center; }
.auth-card { display: grid; gap: .7rem; margin-top: 1.5rem; text-align: left; }
.auth-tabs { display: flex; gap: .5rem; margin-bottom: .3rem; }
.auth-tab { flex: 1; background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: .5rem; color: var(--muted); font-size: .9rem; }
.auth-tab.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.user-bar { display: flex; justify-content: space-between; align-items: center; gap: .5rem; margin-bottom: .5rem; }
.user-info { font-size: .82rem; color: var(--muted); }
.credit-pill {
  background: var(--soft); border: 1px solid var(--line); border-radius: 999px;
  color: var(--accent); font-size: .82rem; font-weight: 700; padding: .25rem .65rem; white-space: nowrap;
}

/* home */
.home-wrap { max-width: 720px; margin: 0 auto; padding: 2rem 1.2rem 3rem; }
h1 { margin: 0; font-size: 2rem; }
.sub { color: var(--muted); margin-top: .2rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 1.2rem; }
.new-card { display: grid; gap: .6rem; margin-top: 1.5rem; }
.billing-card { margin-top: 1rem; display: grid; gap: .8rem; }
.billing-head { display: flex; justify-content: space-between; align-items: baseline; gap: .8rem; }
.billing-title { font-weight: 700; }
.billing-balance { color: var(--accent); font-weight: 800; }
.pack-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .6rem; }
.pack-btn {
  background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: .75rem;
  color: var(--ink); text-align: left; display: grid; gap: .2rem;
}
.pack-btn strong { color: var(--accent); }
.pack-btn span { color: var(--muted); font-size: .78rem; }
.billing-note { color: var(--muted); font-size: .78rem; line-height: 1.45; }
.admin-credit { border-top: 1px solid var(--line); padding-top: .8rem; display: grid; gap: .55rem; }
.admin-title { font-weight: 700; font-size: .95rem; }
.admin-users { display: grid; gap: .5rem; }
.admin-user-row {
  display: grid; grid-template-columns: minmax(140px, 1.4fr) minmax(90px, .6fr) minmax(140px, 1fr) auto minmax(80px, .6fr);
  gap: .45rem; align-items: center; padding: .55rem; background: var(--soft); border: 1px solid var(--line); border-radius: 8px;
}
.admin-user-meta { display: grid; gap: .1rem; }
.admin-user-meta span { color: var(--muted); font-size: .76rem; }
.nc-label { display: grid; gap: .2rem; font-size: .8rem; color: var(--muted); }
.nc-note { font-size: .78rem; color: var(--muted); line-height: 1.5; margin-top: .2rem; }
.sub-hint { font-size: .8rem; color: var(--ink); background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: .5rem .7rem; line-height: 1.6; margin-top: -.2rem; }
.mt { margin-top: 2rem; }
.proj-list { display: grid; gap: .6rem; margin-top: .6rem; }
.proj-item {
  background: var(--panel); border: 1px solid var(--line); border-radius: 12px;
  padding: .9rem 1rem; display: flex; justify-content: space-between; align-items: center;
}
.proj-item .meta { color: var(--muted); font-size: .82rem; }
.proj-item .open { color: var(--accent); font-weight: 600; }
.del { background: none; border: none; color: var(--muted); font-size: 1.1rem; }

.primary.big { font-size: 1.05rem; padding: .8rem 1.4rem; }
.ghost { background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: .55rem 1rem; color: var(--ink); font-size: .9rem; }
#newBtn { margin-top: 1.2rem; }

/* wizard */
#wizard { max-width: 860px; margin: 0 auto; padding: 1rem 1.2rem 4rem; }
.wz-top { display: flex; justify-content: space-between; align-items: center; gap: .5rem; padding: .5rem 0; }
.wz-proj { font-weight: 700; }
.wz-progress { display: flex; flex-wrap: wrap; gap: .4rem; margin: .6rem 0 1.4rem; }
.wz-chip { background: var(--panel); border: 1px solid var(--line); border-radius: 999px; padding: .35rem .8rem; font-size: .82rem; color: var(--muted); }
.wz-chip.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
.wz-chip.done { color: var(--accent); border-color: var(--accent); }
.wz-chip.done.active { color: var(--accent-ink); }
.wz-card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 1.5rem; display: grid; gap: 1rem; }
.wz-card h2 { margin: 0; }
.wz-desc { color: var(--muted); margin: 0; font-size: .92rem; }
.wz-form { display: grid; gap: .8rem; }
.wz-label { display: grid; gap: .3rem; font-size: .85rem; color: var(--muted); }
.wz-output { width: 100%; font-size: .98rem; line-height: 1.7; padding: 1rem; }
.wz-hint { color: var(--accent); font-size: .85rem; }
.wz-actions { display: flex; gap: .6rem; flex-wrap: wrap; }
.wz-nav { margin-top: .3rem; display: flex; gap: 1rem; justify-content: space-between; }
.wz-loading { padding: 2rem 0; color: var(--muted); text-align: center; }
.wz-finish { display: grid; gap: 1.2rem; }
.wz-tool { display: grid; gap: .5rem; }

/* studio layout */
#studio { display: flex; min-height: 100vh; }
#sidebar {
  width: 320px; flex: 0 0 320px; background: var(--panel);
  border-right: 1px solid var(--line); padding: 1rem; overflow-y: auto;
  height: 100vh; position: sticky; top: 0;
}
.proj-head { border-bottom: 1px solid var(--line); padding-bottom: 1rem; margin-bottom: .8rem; }
.proj-title-input { font-size: 1.1rem; font-weight: 700; border: none; padding: .3rem 0; background: none; }
.facts { display: grid; gap: .5rem; margin: .6rem 0; }
.facts label { display: grid; gap: .2rem; font-size: .78rem; color: var(--muted); }
.saved-hint { color: var(--accent); font-size: .75rem; min-height: 1rem; }
.auto-save-hint { color: var(--muted); font-size: .72rem; margin-top: .3rem; line-height: 1.4; }

/* canon panel */
#canonPanel { border-bottom: 1px solid var(--line); padding-bottom: .8rem; margin-bottom: .4rem; }
.canon-head { font-weight: 700; font-size: .9rem; margin-bottom: .4rem; }
.canon-empty { color: var(--muted); font-size: .78rem; line-height: 1.5; }
.canon-slot { margin-bottom: .5rem; }
.canon-label { font-size: .76rem; color: var(--muted); margin-bottom: .15rem; }
.canon-slot textarea { font-size: .82rem; }
.canon-tag { display: inline-block; margin-top: .5rem; color: var(--accent); font-size: .8rem; background: var(--soft); padding: .2rem .6rem; border-radius: 6px; }
.canon-btn { background: var(--accent) !important; color: var(--accent-ink) !important; border: none !important; font-weight: 600; }
.canon-guide { margin-top: .7rem; font-size: .82rem; color: var(--muted); line-height: 1.5; }

/* manuscript */
.ms-writer { display: grid; gap: .6rem; background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1rem; margin: 1.2rem 0; }
.ms-list { display: grid; gap: 1rem; }
.ms-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1rem; }
.ms-bar { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: .5rem; }
.ms-title { font-weight: 700; }
.ms-count { color: var(--muted); font-size: .78rem; }

#stepNav .mod-title { font-weight: 700; margin: 1rem 0 .3rem; font-size: .95rem; }
#stepNav .mod-sub { color: var(--muted); font-size: .78rem; margin-bottom: .5rem; }
#stepNav .les-title { font-size: .82rem; color: var(--muted); margin: .7rem 0 .3rem; }
#stepNav .les-note { color: var(--accent); font-size: .76rem; margin-bottom: .3rem; }
#stepNav .step-btn {
  display: flex; gap: .5rem; align-items: center; width: 100%; text-align: left;
  background: none; border: none; border-radius: 8px; padding: .45rem .5rem; color: var(--ink); font-size: .9rem;
}
#stepNav .step-btn:hover { background: var(--soft); }
#stepNav .step-btn.active { background: var(--soft); font-weight: 600; }
#stepNav .dot { width: 16px; text-align: center; color: var(--muted); }
#stepNav .step-btn.done .dot { color: var(--accent); }

#stepPane { flex: 1; padding: 2rem; max-width: 900px; }
.empty { color: var(--muted); padding: 3rem 0; text-align: center; }
.step-head h2 { margin: 0 0 .2rem; }
.step-head .tip { color: var(--muted); font-size: .9rem; }
.step-id { color: var(--accent); font-size: .8rem; font-weight: 600; }
.fields { display: grid; gap: .8rem; margin: 1.2rem 0; }
.fields label { display: grid; gap: .3rem; font-size: .85rem; }
.fields .auto-tag { color: var(--accent); font-size: .72rem; }
.gen-row { display: flex; gap: .6rem; align-items: center; }
.spinner { display: inline-block; width: 16px; height: 16px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.output-box {
  margin-top: 1.4rem; background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 1rem 1.2rem;
}
.output-box h4 { margin: 0 0 .5rem; }
.output-text { white-space: pre-wrap; font-size: .98rem; }
.output-actions { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .8rem; }
.output-actions button { background: var(--soft); border: 1px solid var(--line); border-radius: 8px; padding: .4rem .8rem; font-size: .85rem; color: var(--ink); }
.refine-row { display: flex; gap: .5rem; margin-top: .8rem; }
.refine-row input { flex: 1; }
.err { color: #c0392b; margin-top: .8rem; font-size: .9rem; }
.msg { color: var(--accent); font-size: .82rem; }

@media (max-width: 800px) {
  #studio { flex-direction: column; }
  #sidebar { width: 100%; flex: none; height: auto; position: static; }
  #stepPane { padding: 1.2rem; }
  .pack-grid { grid-template-columns: 1fr; }
  .admin-user-row { grid-template-columns: 1fr; }
  .wz-top { flex-wrap: wrap; }
}

/* ---- การ์ดเลือกไอเดีย (คลิกเลือกทีละอัน) ---- */
.idea-list { display: flex; flex-direction: column; gap: .75rem; }
.idea-card {
  position: relative; cursor: pointer; background: var(--soft);
  border: 2px solid var(--line); border-radius: 12px;
  padding: .9rem 1rem .9rem 2.7rem; transition: border-color .15s, transform .1s, box-shadow .15s;
}
.idea-card:hover { border-color: var(--accent); transform: translateY(-1px); }
.idea-card.sel { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent); }
.idea-num {
  position: absolute; left: .7rem; top: .95rem; width: 1.5rem; height: 1.5rem; border-radius: 50%;
  display: grid; place-items: center; font-size: .8rem; font-weight: 700;
  background: var(--panel); border: 1px solid var(--line); color: var(--muted);
}
.idea-card.sel .idea-num { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.idea-title { font-weight: 700; margin-bottom: .35rem; padding-right: .5rem; }
.idea-body { font-size: .92rem; color: var(--muted); line-height: 1.55; }
.idea-edit { margin-top: .25rem; display: grid; gap: .4rem; }

/* ---- โหมดเขียนทุกบทรวดเดียว ---- */
.ms-writeall { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; margin-top: .8rem; padding-top: .8rem; border-top: 1px dashed var(--line); }
.ms-all-label { font-size: .9rem; color: var(--muted); font-weight: 600; }
.ms-total { width: 5rem; text-align: center; }
.ms-all-hint { font-size: .82rem; color: var(--muted); margin-top: .4rem; }

/* ---- Google Docs export ---- */
.gdoc-box { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--line); }
.gdoc-title { font-weight: 700; margin-bottom: .5rem; }

/* ---- ตัวเลือกซีรีส์หลายเล่ม (หน้าแรก) ---- */
.series-panel { background: var(--soft); border: 1px solid var(--line); border-radius: 12px; padding: .9rem 1rem; margin: .2rem 0 .4rem; display: grid; gap: .6rem; }
.series-head { font-weight: 700; font-size: .95rem; }
.series-head small { font-weight: 400; color: var(--muted); display: block; margin-top: .15rem; font-size: .8rem; }
.series-row { display: flex; align-items: center; gap: .6rem; flex-wrap: wrap; }
.series-label { min-width: 8rem; font-size: .9rem; color: var(--muted); }
.series-num { width: 8rem; }
.series-total { font-weight: 700; color: var(--accent); }

/* ---- Admin Dashboard ลูกค้า ---- */
.dash-summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: .7rem; margin: 1rem 0; }
.dash-card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1rem; text-align: center; }
.dash-num { font-size: 1.7rem; font-weight: 800; color: var(--accent); }
.dash-lbl { font-size: .82rem; color: var(--muted); margin-top: .2rem; }
.dash-search { width: 100%; padding: .6rem .8rem; margin-bottom: .8rem; }
.dash-table { overflow-x: auto; }
.dtbl { width: 100%; border-collapse: collapse; font-size: .88rem; }
.dtbl th, .dtbl td { padding: .5rem .6rem; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.dtbl thead th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--bg); }
.dtbl td input { padding: .3rem .4rem; }

/* ---- แถบปกนิยายซ้อนแบบเรียงพัด (หน้า Login / หน้าแรก) ---- */
.hero-band {
  position: relative; overflow: hidden; border-radius: 16px;
  margin: 0 0 1.4rem; min-height: 200px;
  background: linear-gradient(135deg, #2b1421 0%, #1a1015 60%, #120c11 100%);
  box-shadow: 0 8px 30px rgba(0,0,0,.25);
}
.hero-band-auth { min-height: 270px; }
.hero-band-imgs { position: absolute; inset: 0; }
.hero-band-imgs img {
  position: absolute; top: -16px; width: 98px; aspect-ratio: 5 / 7; object-fit: cover;
  border-radius: 9px; box-shadow: 0 12px 26px rgba(0,0,0,.5); border: 2px solid rgba(255,255,255,.1);
}
.hero-band-imgs img:nth-child(1) { left: 4%;  transform: rotate(-10deg); z-index: 1; }
.hero-band-imgs img:nth-child(2) { left: 27%; top: 6px; transform: rotate(6deg);   z-index: 3; }
.hero-band-imgs img:nth-child(3) { left: 50%; transform: rotate(-6deg);  z-index: 2; }
.hero-band-imgs img:nth-child(4) { left: 73%; top: 4px; transform: rotate(9deg);   z-index: 3; }
.hero-band-auth .hero-band-imgs img { width: 118px; top: -14px; }
.hero-band-content {
  position: absolute; left: .8rem; right: .8rem; bottom: .8rem; z-index: 4;
  padding: .85rem 1.05rem; border-radius: 12px;
  background: rgba(10,7,9,.6); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
}
.hero-band-auth .hero-band-content { left: 50%; right: auto; transform: translateX(-50%); width: min(94%, 380px); text-align: center; }
.hero-band-content h1 { color: #fff; text-shadow: 0 2px 12px rgba(0,0,0,.55); }
.hero-band-content .sub { color: rgba(255,255,255,.88); }
.hero-band .user-bar { margin-bottom: .5rem; }
.hero-band .user-info { color: rgba(255,255,255,.75); }
.hero-band .link { color: #f0c987; }
@media (max-width: 480px) {
  .hero-band-imgs img { width: 72px; }
  .hero-band-imgs img:nth-child(1) { left: 2%; }
  .hero-band-imgs img:nth-child(2) { left: 21%; }
  .hero-band-imgs img:nth-child(3) { left: 42%; }
  .hero-band-imgs img:nth-child(4) { left: 63%; }
  .hero-band-auth .hero-band-imgs img { width: 92px; }
}

/* ---- ปุ่มเข้าสู่ระบบด้วย Google ---- */
.auth-or { text-align: center; color: var(--muted); font-size: .82rem; margin: .8rem 0 .6rem; }
.google-login {
  display: flex; align-items: center; justify-content: center; gap: .6rem;
  text-decoration: none; background: #fff; color: #3c4043; border: 1px solid #dadce0;
  border-radius: 8px; padding: .6rem 1rem; font-weight: 600; font-size: .95rem;
}
.google-login:hover { background: #f7f8f8; }
.google-login .g-icon {
  display: inline-grid; place-items: center; width: 22px; height: 22px; border-radius: 50%;
  background: conic-gradient(from -45deg, #ea4335 0 25%, #fbbc05 0 50%, #34a853 0 75%, #4285f4 0);
  color: #fff; font-weight: 800; font-size: .8rem;
}