/* Poster AI – giao diện dùng chung.
   Hướng thiết kế: xưởng in poster của trường. Giấy trắng hơi lạnh, mực xanh đen, xanh lá Phú Thạnh làm màu nhấn,
   vàng bút dạ quang cho chỗ cần chú ý. Tiêu đề dùng chữ hẹp kiểu poster cổ động, thân chữ Be Vietnam Pro.
   Bố cục: thanh trên mỏng, nội dung là các tờ giấy phẳng; chỉ khung poster A3 có bóng và dấu xén. */
:root{
  --paper:#eef0ec; --sheet:#ffffff; --sheet2:#f6f7f4; --ink:#16233a; --muted:#5b6577; --line:#d5d9d2; --soft:#e6e9e3;
  --ai:#1d6b45; --ai-ink:#ffffff; --ai-soft:#e2efe7; --ai2:#1d6b45;
  --accent:#d9480f; --accent-soft:#fbe7dc; --mark:#ffe14d;
  --good:#1d7a4a; --good-soft:#dff1e6; --warn:#9a5b00; --warn-soft:#fff2cc; --bad:#b42335; --bad-soft:#fbe3e6;
  --screen:#141b2b;
  --f-display:"Archivo","Be Vietnam Pro",system-ui,sans-serif; --f-body:"Be Vietnam Pro",system-ui,sans-serif; --f-mono:"JetBrains Mono",ui-monospace,monospace;
  --r:6px;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#11161f; --sheet:#1a212d; --sheet2:#202837; --ink:#e7ebf1; --muted:#9aa4b5; --line:#2f3847; --soft:#262f3d;
  --ai:#4cb782; --ai-ink:#0c1a12; --ai-soft:#1d3428; --ai2:#6fcf9c;
  --accent:#ff7a3d; --accent-soft:#3a2418; --mark:#ffe14d;
  --good:#5cc98f; --good-soft:#1c3427; --warn:#f2c14e; --warn-soft:#3a3017; --bad:#ff6b7d; --bad-soft:#3d1d23;
  --screen:#0b1018; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#11161f; --sheet:#1a212d; --sheet2:#202837; --ink:#e7ebf1; --muted:#9aa4b5; --line:#2f3847; --soft:#262f3d;
  --ai:#4cb782; --ai-ink:#0c1a12; --ai-soft:#1d3428; --ai2:#6fcf9c;
  --accent:#ff7a3d; --accent-soft:#3a2418; --mark:#ffe14d;
  --good:#5cc98f; --good-soft:#1c3427; --warn:#f2c14e; --warn-soft:#3a3017; --bad:#ff6b7d; --bad-soft:#3d1d23;
  --screen:#0b1018; color-scheme:dark}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0}
body{background:var(--paper);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
h1,h2,h3{font-family:var(--f-display);margin:0;line-height:1.15;text-wrap:balance;font-stretch:85%}
h1{font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.005em}
h2{font-size:20px;font-weight:700}
h3{font-size:15.5px;font-weight:700}
p{margin:0}
a{color:var(--ai)}
.grad-text{color:var(--ai)}
.eyebrow{font-family:var(--f-body);font-size:11.5px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.mono{font-family:var(--f-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)} .small{font-size:13px}
.wrap{max-width:1320px;margin:0 auto;padding-block:16px 48px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.topbar{display:flex;flex-wrap:wrap;gap:10px 16px;align-items:flex-end;justify-content:space-between;margin-bottom:18px;padding-bottom:12px;border-bottom:2px solid var(--ink)}
.topbar .meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.pill{font-family:var(--f-mono);font-size:12.5px;padding:5px 10px;border-radius:var(--r);background:var(--sheet);border:1px solid var(--line);white-space:nowrap;color:var(--muted)}
.pill b{font-weight:600;color:var(--ink)}
.pill.warn{background:var(--mark);border-color:var(--mark);color:#16233a} .pill.warn b{color:#16233a}
button,.btn{font:inherit;font-size:14px;font-weight:500;border:1px solid var(--line);background:var(--sheet);color:var(--ink);padding:8px 13px;border-radius:var(--r);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:background-color .12s,border-color .12s}
button:hover:not(:disabled),.btn:hover{border-color:var(--muted)}
button.primary,.btn.primary{background:var(--ai);border-color:var(--ai);color:var(--ai-ink);font-weight:600}
button.primary:hover:not(:disabled),.btn.primary:hover{filter:brightness(1.08)}
button.accent{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}
button.danger{background:var(--bad);border-color:var(--bad);color:#fff;font-weight:600}
button.ghost{background:transparent;border-color:transparent;color:var(--muted)}
button.ghost:hover:not(:disabled){color:var(--ink);border-color:var(--line)}
button:disabled{opacity:.45;cursor:not-allowed}
button[aria-pressed="true"]{background:var(--ink);color:var(--paper);border-color:var(--ink)}
button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
input,textarea,select{font:inherit;font-size:15px;padding:9px 11px;border:1px solid var(--line);border-radius:var(--r);background:var(--sheet);color:var(--ink);width:100%}
input:focus,textarea:focus,select:focus{border-color:var(--ink);outline:none}
input::placeholder,textarea::placeholder{color:var(--muted);opacity:.7}
textarea{resize:vertical;min-height:64px}
label{font-size:13px;font-weight:600}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.card{background:var(--sheet);border:1px solid var(--line);border-radius:var(--r);padding:18px;display:grid;gap:14px;min-width:0}
.banner{padding:10px 14px;border-radius:var(--r);font-size:14px;border-left:4px solid currentColor}
.banner.warn{background:var(--warn-soft);color:var(--warn)}
.banner.bad{background:var(--bad-soft);color:var(--bad)}
.banner.good{background:var(--good-soft);color:var(--good)}
.banner.info{background:var(--ai-soft);color:var(--ai)}
.tag{font-family:var(--f-body);font-size:11.5px;font-weight:600;padding:2px 7px;border-radius:3px;white-space:nowrap;display:inline-block}
.t-draft{background:var(--soft);color:var(--muted)} .t-pending{background:var(--mark);color:#16233a} .t-approved{background:var(--good-soft);color:var(--good)} .t-rejected{background:var(--bad-soft);color:var(--bad)} .t-final{background:var(--accent);color:#fff} .t-printed{background:var(--ink);color:var(--paper)}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 16px;border-radius:var(--r);font-size:14px;z-index:100;max-width:90vw;box-shadow:0 6px 20px rgba(0,0,0,.18)}
.toast.bad{background:var(--bad);color:#fff}
.spin{width:34px;height:34px;border-radius:50%;border:3px solid rgba(255,255,255,.25);border-top-color:#fff;animation:sp .9s linear infinite;margin:0 auto 10px}
@keyframes sp{to{transform:rotate(360deg)}}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line);vertical-align:top}
th{font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600;border-bottom:2px solid var(--ink)}
td.n,th.n{text-align:right;font-variant-numeric:tabular-nums}
.scroll{overflow-x:auto}
/* phiếu prompt: giống phiếu giấy in sẵn */
.sheet-form{display:grid;border:1.5px solid var(--ink);border-radius:2px;font-size:13.5px;overflow:hidden;background:var(--sheet)}
.sheet-form>div,.sheet-form .f2>div{padding:7px 10px;border-bottom:1px solid var(--line);min-width:0;overflow-wrap:anywhere}
.sheet-form>div:last-child{border-bottom:0}
.sheet-form .f2{display:grid;grid-template-columns:1fr 1fr;padding:0}
.sheet-form .f2>div{border-bottom:0}
.sheet-form .f2>div+div{border-left:1px solid var(--line)}
.sheet-form i{display:block;font-style:normal;font-size:10.5px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
/* khung xem trước: tờ A3 có dấu xén */
.screen{background:var(--screen);border-radius:var(--r);padding:16px 18px 14px;display:grid;gap:10px;color:#dfe5ee}
.screen .bar{display:flex;justify-content:space-between;font-family:var(--f-mono);font-size:11.5px;color:#93a0b4;gap:8px;flex-wrap:wrap}
.poster{position:relative;width:100%;aspect-ratio:297/420;max-width:100%;background:#fff;border-radius:1px;overflow:visible;box-shadow:0 1px 0 rgba(0,0,0,.2),0 12px 28px -12px rgba(0,0,0,.6)}
.poster::before,.poster::after{content:"";position:absolute;width:14px;height:14px;pointer-events:none;border-color:#93a0b4;border-style:solid}
.poster::before{top:-9px;left:-9px;border-width:1px 0 0 1px}
.poster::after{bottom:-9px;right:-9px;border-width:0 1px 1px 0}
.poster img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.poster .empty,.poster .busy{position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:24px;font-size:14px;color:#6b7686}
.poster .empty{background:repeating-linear-gradient(-45deg,#f4f5f2 0 10px,#eceee9 10px 20px)}
.poster .busy{background:rgba(20,27,43,.82);color:#fff}
.vers{display:flex;gap:8px}
.vers button{flex:1;justify-content:center;font-size:13px;background:transparent;color:#dfe5ee;border-color:#3a4558}
.vers button[aria-pressed="true"]{background:#fff;color:#141b2b;border-color:#fff}
.login{max-width:720px;margin:5vh auto;display:grid;gap:18px}
.tabs{display:flex;gap:6px;flex-wrap:wrap}
.tabs button{flex:1 1 auto;justify-content:center}
.theme-btn{width:38px;height:38px;padding:0;justify-content:center;flex:none}
.theme-btn svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.theme-btn.floating{position:fixed;top:calc(14px + env(safe-area-inset-top,0px));right:calc(14px + env(safe-area-inset-right,0px));z-index:50}
.ico{width:22px;height:22px;flex:none;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
@media print{
  :root{--paper:#fff;--sheet:#fff;--ink:#111;--muted:#555;--line:#bbb;color-scheme:light}
  body{background:#fff!important;color:#111}
  .noprint{display:none!important}
}