/* Trang đăng nhập v3 — từ docs/uiv3/4trang/export/dang-nhap.html (trang độc lập, không dùng layout chung) */
:root{--orange:#f1a01f;--orange-600:#d4880d;--sky:#2098d4;--sky-100:#e3f2fa;--sky-600:#1a7db1;--ocean:#134a85;--navy:#02315f;--navy-50:#eef2f7;--navy-100:#d9e1ec;--muted:#4d6788;--field:#6d84a2;--danger:#c62828;--danger-bg:#fdecec;--danger-ink:#8f1d1d;--ease:cubic-bezier(.22,.8,.3,1)}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:'Be Vietnam Pro','Helvetica Neue',Arial,sans-serif;color:var(--navy);background:#fff;line-height:1.5;overflow-x:clip;-webkit-font-smoothing:antialiased}
a{color:var(--ocean);font-weight:600;text-underline-offset:3px}a:hover{color:var(--navy)}
.page{display:grid;grid-template-columns:1fr 1fr;min-height:100vh;min-height:100dvh}

/* ===== CỘT GIỚI THIỆU (map: cột trái / khối giới thiệu do admin cấu hình ảnh nền) =====
   Ảnh nền admin: đặt --intro-bg-image:url(...) và giảm --intro-overlay (vd .82) trên .intro */
.intro{position:relative;isolation:isolate;display:flex;flex-direction:column;justify-content:flex-start;gap:28px;padding:48px clamp(32px,5vw,72px) 32px;color:var(--navy);background-color:#fdc929;background-image:var(--intro-bg-image,none);background-size:cover;background-position:center;overflow:hidden;min-height:max(100dvh,780px)}.intro>div{max-width:400px}.intro::after{content:"";position:absolute;right:0;bottom:0;width:88%;height:56%;z-index:-1;pointer-events:none;background:url("/assets/img/login-intro.jpg") center 47%/cover no-repeat;-webkit-mask-image:linear-gradient(to bottom,transparent,#000 28%),linear-gradient(to right,transparent,#000 22%);-webkit-mask-composite:source-in;mask-image:linear-gradient(to bottom,transparent,#000 28%),linear-gradient(to right,transparent,#000 22%);mask-composite:intersect}
.intro::before{content:"";position:absolute;inset:0;z-index:-1;opacity:var(--intro-overlay,0);background:linear-gradient(160deg,#0f5c91 0%,#0b3d70 48%,#02315f 100%)}
.intro h2{font-family:'Anton','Impact',sans-serif;font-weight:400;text-transform:uppercase;letter-spacing:.01em;line-height:1.4;font-size:clamp(28px,2.8vw,42px);margin:0}.intro h2 span{display:block}.intro h2 .l2{font-family:'Be Vietnam Pro',sans-serif;font-weight:600;text-transform:none;font-size:.6em;letter-spacing:0;line-height:1.5}.intro h2 .l3{color:var(--ocean)}
.intro .sub{font-weight:500;font-size:clamp(16px,1.25vw,19px);line-height:1.6;margin:12px 0 0;max-width:36ch}
.skills{width:100%;max-width:112px;height:auto;display:block;overflow:visible}
.skills .t{font-family:'Anton','Impact',sans-serif;fill:var(--navy);text-anchor:middle}
.skills .c{font-family:'Be Vietnam Pro',sans-serif;font-weight:600;fill:var(--navy);text-anchor:middle;letter-spacing:.02em}
.perks{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:10px}
.perks li{display:flex;align-items:center;gap:12px;font-size:16px;font-weight:600}
.perks li::before{content:"";flex:none;width:26px;height:26px;border-radius:50%;background:var(--orange) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 26 26'%3E%3Cpath d='M7 13.5l4 4 8-9' fill='none' stroke='%2302315f' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/100% no-repeat}
.band{max-width:520px;width:100%}
.band .cap{font-size:13px;font-weight:500;margin:0 0 12px;display:flex;justify-content:space-between}
.band .rail{position:relative;height:8px;border-radius:8px;background:rgba(255,255,255,.22)}
.band .fill{position:absolute;inset:0 auto 0 0;width:60%;border-radius:8px;background:var(--orange);transform-origin:left;animation:grow 1.1s var(--ease) .9s both}
.band .pin{position:absolute;left:60%;top:50%;width:22px;height:22px;margin:-11px 0 0 -11px;border-radius:50%;background:#fff;border:5px solid var(--orange);animation:pop .5s var(--ease) 1.8s both}
.band .ticks{display:flex;justify-content:space-between;margin-top:10px;font-size:13px;font-weight:500}
.foot{font-size:13px;font-weight:300;margin:0}
.anim{animation:up .7s var(--ease) both;animation-delay:calc(var(--i,0)*90ms + 80ms)}
.sh{transform-box:fill-box;transform-origin:center;animation:pop .6s var(--ease) both;animation-delay:calc(var(--i,0)*110ms + 300ms)}
@keyframes up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
@keyframes pop{from{opacity:0;transform:scale(.88)}to{opacity:1;transform:none}}
@keyframes grow{from{transform:scaleX(0)}to{transform:none}}
@keyframes shake{0%,100%{transform:none}20%{transform:translateX(-6px)}40%{transform:translateX(5px)}60%{transform:translateX(-3px)}80%{transform:translateX(2px)}}
@keyframes spin{to{transform:rotate(360deg)}}

/* ===== CỘT FORM ===== */
.formcol{display:flex;align-items:center;justify-content:center;padding:32px 24px;background:#fff}
.box{width:100%;max-width:400px}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:36px;text-decoration:none;color:var(--navy)}
.brand svg{width:48px;height:auto;flex:none}
.brand b{font-family:'Anton','Impact',sans-serif;font-weight:400;font-size:26px;letter-spacing:.04em;text-transform:uppercase;line-height:1}
h1{font-size:28px;line-height:1.2;font-weight:700;margin:0 0 8px;letter-spacing:-.01em}
.lead{margin:0 0 24px;color:var(--muted);font-size:15px}
.banner{display:none;gap:12px;padding:14px 16px;border-radius:14px;margin-bottom:20px;font-size:14px;line-height:1.5;border:1.5px solid}
.banner.show{display:flex;animation:up .4s var(--ease) both}
.banner b{display:block;font-size:15px}
.banner .dot{flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:13px;font-weight:700;color:#fff;margin-top:1px}
.banner.info{background:var(--sky-100);border-color:var(--sky-600);color:var(--navy)}.banner.info .dot{background:var(--ocean)}
.banner.err{background:var(--danger-bg);border-color:var(--danger);color:var(--danger-ink)}.banner.err .dot{background:var(--danger)}
.field{margin-bottom:18px}
label,.lbl{display:block;font-size:14px;font-weight:600;margin-bottom:8px}
.ctl{display:flex;align-items:stretch;min-height:52px;border:1.5px solid var(--field);border-radius:14px;background:#fff;transition:border-color .16s,box-shadow .16s}
.ctl:hover{border-color:var(--ocean)}
.ctl:focus-within{border-color:var(--sky);box-shadow:0 0 0 4px var(--sky-100)}
.field.bad .ctl{border-color:var(--danger);box-shadow:0 0 0 4px var(--danger-bg)}
.field.shake .ctl{animation:shake .4s var(--ease)}
.ctl input{flex:1;min-width:0;border:0;background:transparent;font:inherit;font-size:16px;color:var(--navy);padding:0 16px;outline:0;border-radius:14px}
.ctl input::placeholder{color:#6b7f9a}
.cc{position:relative;flex:none;width:92px;display:flex;align-items:center;justify-content:center;gap:8px;font-weight:600;font-size:16px;border-right:1.5px solid var(--navy-100);background:var(--navy-50);border-radius:12.5px 0 0 12.5px}
.cc::after{content:"";width:7px;height:7px;border:solid var(--navy);border-width:0 2px 2px 0;transform:rotate(45deg) translateY(-2px)}
.cc select{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer;font-size:16px;border:0}
.tog{flex:none;min-width:64px;border:0;background:transparent;color:var(--ocean);font:inherit;font-size:14px;font-weight:600;padding:0 16px;cursor:pointer;border-radius:0 12.5px 12.5px 0}
.tog:hover{color:var(--navy);background:var(--navy-50)}
.msg{display:none;margin:8px 0 0;font-size:14px;font-weight:500;color:var(--danger);align-items:flex-start;gap:8px}
.msg::before{content:"!";flex:none;width:18px;height:18px;margin-top:2px;border-radius:50%;background:var(--danger);color:#fff;font-size:12px;font-weight:700;display:grid;place-items:center}
.field.bad .msg{display:flex}
.forgot[hidden]{display:none}.forgot{display:flex;justify-content:flex-end;margin:-6px 0 20px}
.forgot a{display:inline-flex;align-items:center;min-height:44px;font-size:14px}
.cap-row{display:flex;gap:10px;align-items:stretch;margin-bottom:10px}
.cap-img{flex:1;min-height:52px;border-radius:14px;background:var(--navy-50);border:1.5px solid var(--navy-100);display:grid;place-items:center;overflow:hidden}
.cap-img svg{display:block;width:100%;height:52px}
.ghost{flex:none;min-width:72px;padding:0 14px;border:1.5px solid var(--field);border-radius:14px;background:#fff;color:var(--ocean);font:inherit;font-size:14px;font-weight:600;cursor:pointer}
.ghost:hover{background:var(--navy-50);color:var(--navy)}
#capField{display:none}#capField.on{display:block}
.btn{position:relative;width:100%;min-height:54px;border:0;border-radius:99px;background:var(--orange);color:var(--navy);font:inherit;font-size:17px;font-weight:700;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:background .16s,transform .16s}
.btn:hover{background:var(--orange-600)}.btn:active{transform:scale(.985)}
.btn[disabled]{cursor:progress;background:var(--orange-200,#fbdfa8);color:var(--navy);transform:none}
.btn .sp{display:none;width:18px;height:18px;border-radius:50%;border:2.5px solid var(--navy);border-right-color:transparent;animation:spin .7s linear infinite}
.btn[disabled] .sp{display:block}
:focus-visible{outline:3px solid var(--ocean);outline-offset:3px}
.ctl :focus-visible{outline:0}
.ctl:has(:focus-visible){border-color:var(--sky)}

@media (max-width:900px){
.page{grid-template-columns:1fr;grid-template-rows:auto 1fr}
.intro{padding:28px 24px 48px;gap:0;display:block;min-height:0}.intro::after{display:none}.intro>div{max-width:none}
.intro h2{font-size:26px;line-height:1.3}
.intro .sub{margin-top:10px;font-size:15px}
.skills{display:none}.perks{display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:14px 0 0;background:none;max-width:none}.perks li{font-size:13px;gap:8px;padding:5px 12px 5px 6px;border-radius:99px;background:rgba(255,255,255,.78)}.perks li::before{width:18px;height:18px}
.foot{display:none}
.formcol{align-items:flex-start;margin-top:-24px;border-radius:24px 24px 0 0;position:relative;padding:28px 24px 96px}
.brand{margin-bottom:24px}
}
@media (max-width:640px){
.intro{padding:22px 20px 44px}.intro h2{font-size:22px}
.intro .sub{display:none}
.formcol{padding:24px 20px 96px}
h1{font-size:24px}
}
@media (prefers-reduced-motion:reduce){
*,*::before,*::after{animation:none!important;transition:none!important}
}

/* lỗi do máy chủ trả về */
.banner.show strong{display:block;font-size:15px}
.field .msg.server{display:flex}
.cap-img img{display:block;width:100%;height:52px;object-fit:contain}
.forgot a{font-weight:600}