/* ============================================================
   FairDee Shop — Design System (ใช้ร่วมทุกหน้า)
   แนวทาง: เรียบ สะอาด พรีเมียม (Apple-inspired) + แบรนด์ FairDee
   ============================================================ */

:root{
  /* brand */
  --navy:#1554A2; --navy-700:#0F3D78; --navy-50:#EAF1FA;
  --orange:#F58B1E; --orange-600:#E07C10; --orange-50:#FEF3E5;
  /* ink / neutrals (เทาอมน้ำเงินเล็กน้อย = ตั้งใจเลือก) */
  --ink:#1B2330; --ink-2:#525B68; --ink-3:#8A93A0;
  --bg:#FFFFFF; --bg-2:#F5F6F8; --bg-3:#FBFBFD;
  --line:#E4E7EC; --line-2:#EEF0F4;
  /* semantic (แยกจากสี accent) */
  --ok:#1E874B; --ok-bg:#E7F5EE;
  --warn:#A85A21; --warn-bg:#FBEFE1;
  --info:#1554A2; --info-bg:#EAF1FA;
  --danger:#C23B3B; --danger-bg:#FBEBEB;
  --muted-fg:#6B7280; --muted-bg:#EEF0F3;
  /* shape */
  --r:14px; --r-sm:10px; --r-lg:20px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(20,32,54,.06);
  --sh-2:0 2px 6px rgba(20,32,54,.06), 0 12px 30px rgba(20,32,54,.07);
  --sh-3:0 8px 40px rgba(20,32,54,.14);
  --maxw:1160px;
  --font:"Anuphan","Noto Sans Thai",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color-scheme:light;
}
:root:not([data-theme="light"]){ @media (prefers-color-scheme:dark){
  --navy:#5A97E0; --navy-700:#8FBBF0; --navy-50:#182739;
  --orange:#F79B3B; --orange-600:#F58B1E; --orange-50:#2A1E10;
  --ink:#EAEEF4; --ink-2:#AEB7C4; --ink-3:#7E8896;
  --bg:#10151C; --bg-2:#161D26; --bg-3:#1A222D;
  --line:#28313D; --line-2:#212932;
  --ok:#4FBE82; --ok-bg:#122820;
  --warn:#E0975A; --warn-bg:#2A1E12;
  --info:#5A97E0; --info-bg:#152437;
  --danger:#E76D6D; --danger-bg:#2C1517;
  --muted-fg:#9AA4B2; --muted-bg:#1E2732;
  --sh-1:0 1px 2px rgba(0,0,0,.4);
  --sh-2:0 2px 8px rgba(0,0,0,.4),0 14px 34px rgba(0,0,0,.5);
  --sh-3:0 10px 44px rgba(0,0,0,.6);
  color-scheme:dark;
}}
:root[data-theme="dark"]{
  --navy:#5A97E0; --navy-700:#8FBBF0; --navy-50:#182739;
  --orange:#F79B3B; --orange-600:#F58B1E; --orange-50:#2A1E10;
  --ink:#EAEEF4; --ink-2:#AEB7C4; --ink-3:#7E8896;
  --bg:#10151C; --bg-2:#161D26; --bg-3:#1A222D;
  --line:#28313D; --line-2:#212932;
  --ok:#4FBE82; --ok-bg:#122820;
  --warn:#E0975A; --warn-bg:#2A1E12;
  --info:#5A97E0; --info-bg:#152437;
  --danger:#E76D6D; --danger-bg:#2C1517;
  --muted-fg:#9AA4B2; --muted-bg:#1E2732;
  --sh-1:0 1px 2px rgba(0,0,0,.4);
  --sh-2:0 2px 8px rgba(0,0,0,.4),0 14px 34px rgba(0,0,0,.5);
  --sh-3:0 10px 44px rgba(0,0,0,.6);
  color-scheme:dark;
}

*{box-sizing:border-box}
html,body{margin:0}
body{
  font-family:var(--font);
  color:var(--ink); background:var(--bg);
  font-size:16px; line-height:1.6; -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{margin:0; line-height:1.2; letter-spacing:-.01em; font-weight:700; text-wrap:balance}
p{margin:0}
:focus-visible{outline:3px solid var(--navy); outline-offset:2px; border-radius:6px}
@media (prefers-reduced-motion:reduce){ *{animation-duration:.001ms!important; transition-duration:.001ms!important} }

/* ---------- layout ---------- */
.container{max-width:var(--maxw); margin-inline:auto; padding-inline:20px}
@media (max-width:480px){ .container{padding-inline:16px} }
.section{padding-block:64px}
.section-sm{padding-block:40px}
.eyebrow{font-size:13px; font-weight:600; letter-spacing:.14em; text-transform:uppercase; color:var(--navy)}
.muted{color:var(--ink-2)}
.center{text-align:center}

/* ---------- demo ribbon ---------- */
.demo-ribbon{
  background:var(--ink); color:#fff; font-size:13px; text-align:center;
  padding:7px 16px; letter-spacing:.01em;
}
.demo-ribbon b{color:var(--orange); font-weight:700}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  min-height:46px; padding:0 22px; border-radius:var(--r-pill);
  font-size:16px; font-weight:600; cursor:pointer; border:1.5px solid transparent;
  transition:transform .12s ease, background .15s ease, box-shadow .15s ease; white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--navy); color:#fff}
.btn-primary:hover{background:var(--navy-700)}
.btn-orange{background:var(--orange); color:#fff}
.btn-orange:hover{background:var(--orange-600)}
.btn-ghost{background:transparent; color:var(--navy); border-color:var(--line)}
.btn-ghost:hover{background:var(--bg-2); border-color:var(--navy)}
.btn-plain{background:var(--bg-2); color:var(--ink)}
.btn-plain:hover{background:var(--muted-bg)}
.btn-sm{min-height:38px; padding:0 15px; font-size:14px}
.btn-block{width:100%}
.btn:disabled{opacity:.5; cursor:not-allowed}
.btn-danger{background:var(--danger); color:#fff}

/* ---------- badges / pills ---------- */
.badge{display:inline-flex; align-items:center; gap:6px; font-size:13px; font-weight:600;
  padding:3px 11px; border-radius:var(--r-pill); line-height:1.5; white-space:nowrap}
.badge::before{content:""; width:7px; height:7px; border-radius:50%; background:currentColor; opacity:.9}
.badge.plain::before{display:none}
.t-ok{color:var(--ok); background:var(--ok-bg)}
.t-warn{color:var(--warn); background:var(--warn-bg)}
.t-info{color:var(--info); background:var(--info-bg)}
.t-danger{color:var(--danger); background:var(--danger-bg)}
.t-muted{color:var(--muted-fg); background:var(--muted-bg)}

/* ---------- forms ---------- */
.field{display:flex; flex-direction:column; gap:6px; margin-bottom:16px}
.field label{font-size:14px; font-weight:600; color:var(--ink)}
.field .req{color:var(--danger)}
.input, .select, .textarea{
  font-family:inherit; font-size:16px; color:var(--ink); background:var(--bg);
  border:1.5px solid var(--line); border-radius:var(--r-sm); padding:11px 13px; min-height:46px; width:100%;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.textarea{min-height:88px; resize:vertical}
.input:focus, .select:focus, .textarea:focus{border-color:var(--navy); box-shadow:0 0 0 3px var(--navy-50); outline:none}
.input.err, .select.err, .textarea.err{border-color:var(--danger); box-shadow:0 0 0 3px var(--danger-bg)}
.field .hint{font-size:13px; color:var(--ink-2)}
.field .error-msg{font-size:13px; color:var(--danger); font-weight:600; min-height:0}
.row-2{display:grid; grid-template-columns:1fr 1fr; gap:14px}
.row-3{display:grid; grid-template-columns:1fr 1fr 1fr; gap:14px}
@media (max-width:560px){ .row-2,.row-3{grid-template-columns:1fr} }

/* ---------- cards / surfaces ---------- */
.card{background:var(--bg); border:1px solid var(--line); border-radius:var(--r); box-shadow:var(--sh-1)}
.panel{background:var(--bg); border:1px solid var(--line); border-radius:var(--r); padding:20px}
.hr{height:1px; background:var(--line); border:0; margin:0}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto; border:1px solid var(--line); border-radius:var(--r); background:var(--bg)}
table.tbl{width:100%; border-collapse:collapse; font-size:14px; min-width:640px}
table.tbl th, table.tbl td{padding:12px 14px; text-align:left; border-bottom:1px solid var(--line-2); white-space:nowrap}
table.tbl th{font-size:12.5px; text-transform:uppercase; letter-spacing:.05em; color:var(--ink-2); background:var(--bg-3); font-weight:600}
table.tbl tbody tr:hover{background:var(--bg-2)}
table.tbl td.num, table.tbl th.num{text-align:right; font-variant-numeric:tabular-nums}
table.tbl tr:last-child td{border-bottom:0}
.row-click{cursor:pointer}

/* ---------- toast ---------- */
#fd-toast{position:fixed; left:50%; bottom:28px; transform:translateX(-50%) translateY(20px);
  background:var(--ink); color:#fff; padding:13px 20px; border-radius:var(--r-pill); font-size:15px; font-weight:600;
  box-shadow:var(--sh-3); opacity:0; pointer-events:none; transition:opacity .25s, transform .25s; z-index:120; max-width:90vw}
#fd-toast.show{opacity:1; transform:translateX(-50%) translateY(0)}
#fd-toast.ok::before{content:"✓ "; color:var(--orange)}

/* ---------- modal ---------- */
.modal-back{position:fixed; inset:0; background:rgba(15,22,34,.5); display:none; align-items:center; justify-content:center; padding:16px; z-index:130}
.modal-back.show{display:flex}
.modal{background:var(--bg); border-radius:var(--r-lg); box-shadow:var(--sh-3); max-width:520px; width:100%; max-height:90vh; overflow:auto; padding:24px}
.modal h3{font-size:20px; margin-bottom:6px}

/* ---------- empty / loading / error states ---------- */
.state{display:flex; flex-direction:column; align-items:center; gap:10px; text-align:center; padding:48px 20px; color:var(--ink-2)}
.state .ic{width:52px; height:52px; border-radius:50%; background:var(--bg-2); display:grid; place-items:center; font-size:24px}
.spinner{width:34px; height:34px; border:3px solid var(--line); border-top-color:var(--navy); border-radius:50%; animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- notice ---------- */
.notice{display:flex; gap:10px; padding:12px 14px; border-radius:var(--r-sm); font-size:14px; line-height:1.5}
.notice.info{background:var(--info-bg); color:var(--navy-700)}
.notice.warn{background:var(--warn-bg); color:var(--warn)}
.notice.ok{background:var(--ok-bg); color:var(--ok)}
.notice .n-ic{flex:none; font-weight:800}

/* price */
.price{font-weight:700; font-variant-numeric:tabular-nums}
.price-old{color:var(--ink-3); text-decoration:line-through; font-weight:500; margin-left:8px; font-size:.85em}
.tnum{font-variant-numeric:tabular-nums}
[hidden]{display:none!important}