*{box-sizing:border-box;margin:0;padding:0}
:root{
--primary:#28B8F8;
--primary-dark:#0E8FC8;
--primary-deep:#0B7AAB;
--primary-soft:#E1F5FE;
--accent:#88C030;
--accent-dark:#6FA127;
--accent-soft:#F1F8E1;
--ink:#0F1B2D;
--muted:#5C6B7E;
--line:#E6EAF0;
--line-soft:#F1F4F8;
--bg:#F6F8FB;
--card:#FFFFFF;
--danger:#E11D48;
--radius:14px;
--shadow:0 4px 24px rgba(15,27,45,.06);
--shadow-lg:0 12px 40px rgba(15,27,45,.10);
}
html,body{font-family:'Be Vietnam Pro',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--ink);background:var(--bg);line-height:1.55;-webkit-font-smoothing:antialiased;min-height:100vh}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
.icon{width:1em;height:1em;display:inline-block;flex-shrink:0;vertical-align:-.125em}
/* ─── Header (đồng bộ LDP) ─── */
header.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:saturate(140%) blur(10px);border-bottom:1px solid var(--line)}
header.topbar .row{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}
.logo img{height:38px;width:auto}
nav.menu{display:flex;gap:32px;font-weight:500;font-size:14.5px;color:var(--ink);flex:1;justify-content:center}
nav.menu a{display:inline-flex;align-items:center;gap:4px;padding:6px 0;position:relative;transition:color .15s}
nav.menu a:hover, nav.menu a.active{color:var(--primary)}
nav.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-26px;height:2px;background:var(--primary)}
nav.menu .caret{font-size:9px;opacity:.6}
.topbar .help{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted)}
.topbar .help b{color:var(--ink);font-weight:600}
.topbar .help svg{width:15px;height:15px;color:var(--primary-dark)}
@media (max-width:960px){nav.menu{display:none}}
@media (max-width:560px){.topbar .help{display:none}}
/* ═══════════════ MAIN — Split Hero (Left info / Right form) ═══════════════ */
.auth-wrap{display:grid;grid-template-columns:0.95fr 1.05fr;gap:56px;padding:48px 0 72px;align-items:center;min-height:calc(100vh - 74px)}
@media (max-width:960px){.auth-wrap{grid-template-columns:1fr;gap:28px;padding:28px 0 48px;align-items:start;min-height:auto}}
/* ── Left panel ── */
.auth-left{max-width:480px}
.auth-left .pill{display:inline-flex;align-items:center;gap:8px;background:var(--accent-soft);color:var(--accent-dark);padding:6px 13px;border-radius:999px;font-size:12px;font-weight:600;margin-bottom:16px}
.auth-left .pill .dot{width:7px;height:7px;background:var(--accent);border-radius:50%;animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.6);opacity:.4}}
.auth-left h1{font-size:clamp(24px,2.8vw,34px);font-weight:800;line-height:1.15;letter-spacing:-.02em;margin-bottom:14px}
.auth-left h1 em{font-style:normal;color:var(--primary);font-weight:800}
.auth-left .sub{font-size:14px;color:var(--muted);margin-bottom:24px;line-height:1.6}
.perks{display:flex;flex-direction:column;gap:10px;margin-bottom:20px}
.perk{display:flex;gap:12px;align-items:flex-start;padding:12px 14px;background:#fff;border:1px solid var(--line);border-radius:11px;transition:all .15s}
.perk:hover{border-color:var(--primary);box-shadow:var(--shadow)}
.perk .ico{width:34px;height:34px;border-radius:9px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center;flex-shrink:0}
.perk .ico svg{width:16px;height:16px}
.perk .body strong{display:block;font-size:13.5px;font-weight:600;color:var(--ink);margin-bottom:2px}
.perk .body span{font-size:12.5px;color:var(--muted);line-height:1.5}
.help-box{padding:14px 16px;background:#fff;border:1px dashed var(--line);border-radius:11px;font-size:12.5px;color:var(--muted)}
.help-box b{color:var(--ink);font-weight:600}
.help-box .row{display:flex;align-items:center;gap:8px;margin-top:8px;flex-wrap:wrap}
.help-box .row svg{width:13px;height:13px;color:var(--primary)}
.help-box .row a{color:var(--primary-dark);font-weight:600}
/* ── Right: Auth card ── */
.auth-card{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);overflow:hidden;border:1px solid var(--line-soft)}
/* tab switcher */
.tabs{display:grid;grid-template-columns:1fr 1fr;background:var(--line-soft);padding:6px;margin:18px 18px 0;border-radius:12px;position:relative}
.tabs .tab{padding:11px 16px;font-size:14px;font-weight:600;color:var(--muted);background:transparent;border:0;cursor:pointer;font-family:inherit;border-radius:9px;transition:color .2s;position:relative;z-index:2}
.tabs .tab.active{color:var(--ink)}
.tabs .indicator{position:absolute;top:6px;bottom:6px;width:calc(50% - 6px);background:#fff;border-radius:9px;box-shadow:0 2px 8px rgba(15,27,45,.08);transition:transform .28s cubic-bezier(.4,.0,.2,1);z-index:1}
.tabs[data-active="register"] .indicator{transform:translateX(calc(100% + 0px))}
.pane{padding:24px 28px 26px;display:none}
.pane.active{display:block;animation:fadeIn .25s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media (max-width:480px){.pane{padding:20px 18px 22px}}
.pane h2{font-size:20px;font-weight:700;margin-bottom:4px;letter-spacing:-.01em}
.pane .pane-sub{font-size:13px;color:var(--muted);margin-bottom:18px}
/* form */
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px}
.field label .req{color:var(--danger);margin-left:2px}
.field .ctrl{position:relative}
.field .ctrl svg{position:absolute;left:14px;top:50%;transform:translateY(-50%);width:16px;height:16px;color:var(--muted);pointer-events:none}
.field input, .field select, .field textarea{
width:100%;padding:12px 14px 12px 42px;font-size:14px;font-family:inherit;color:var(--ink);
background:#fff;border:1.5px solid var(--line);border-radius:10px;outline:0;transition:all .15s;
}
.field select{appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='%235C6B7E' stroke-width='2'><path d='M3 5l3 3 3-3'/></svg>");background-repeat:no-repeat;background-position:right 14px center;background-size:12px;padding-right:36px}
.field textarea{padding:12px 14px;min-height:80px;resize:vertical;line-height:1.5}
.field input:focus, .field select:focus, .field textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(40,184,248,.12)}
.field input::placeholder, .field textarea::placeholder{color:#94A3B8}
.field .hint{font-size:12px;color:var(--muted);margin-top:5px;line-height:1.45}
.field .toggle-pw{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:none;border:0;cursor:pointer;color:var(--muted);padding:6px;display:grid;place-items:center}
.field .toggle-pw:hover{color:var(--primary)}
.field .toggle-pw svg{width:16px;height:16px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:480px){.field-row{grid-template-columns:1fr;gap:0}}
.row-between{display:flex;justify-content:space-between;align-items:center;margin:6px 0 18px;flex-wrap:wrap;gap:10px}
.checkbox{display:inline-flex;align-items:flex-start;gap:8px;font-size:13px;color:var(--muted);cursor:pointer;line-height:1.45}
.checkbox input{width:16px;height:16px;margin-top:2px;accent-color:var(--primary);flex-shrink:0;cursor:pointer}
.checkbox a{color:var(--primary-dark);font-weight:600}
.link{font-size:13px;color:var(--primary-dark);font-weight:600}
.link:hover{text-decoration:underline}
.btn-submit{width:100%;padding:14px;background:var(--primary-dark);color:#fff;border:0;border-radius:10px;font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:all .15s;box-shadow:0 6px 18px rgba(40,184,248,.30)}
.btn-submit:hover{background:var(--primary-deep);transform:translateY(-1px);box-shadow:0 10px 24px rgba(40,184,248,.42)}
.btn-submit svg{width:16px;height:16px}
/* divider */
.divider{display:flex;align-items:center;gap:14px;margin:20px 0 16px;color:var(--muted);font-size:12px;font-weight:500}
.divider::before, .divider::after{content:"";flex:1;height:1px;background:var(--line)}
.switch-hint{text-align:center;font-size:13.5px;color:var(--muted);margin-top:6px}
.switch-hint a{color:var(--primary-dark);font-weight:600;cursor:pointer}
/* ─── Footer (đồng bộ LDP) ─── */
footer{background:#0F1B2D;color:#A8B5C7;padding:48px 0 24px;font-size:14px;margin-top:auto}
footer .top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px;margin-bottom:32px}
@media (max-width:960px){footer .top{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){footer .top{grid-template-columns:1fr}}
footer .col h5{color:#fff;font-size:15px;font-weight:600;margin-bottom:14px}
footer ul{list-style:none}
footer ul li{padding:4px 0}
footer ul li a{color:#A8B5C7;font-size:13.5px}
footer ul li a:hover{color:#fff}
footer .brand img{height:40px;margin-bottom:14px;filter:brightness(0) invert(1)}
footer .brand p{margin-bottom:14px;line-height:1.6;font-size:13.5px}
footer .contact-line{display:flex;gap:10px;align-items:flex-start;padding:5px 0;font-size:13.5px}
footer .contact-line svg{width:16px;height:16px;color:var(--primary);flex-shrink:0;margin-top:3px}
footer .copy{padding-top:22px;border-top:1px solid #1F3050;font-size:12.5px;color:#5C6B7E;text-align:center;letter-spacing:.05em}
button.toggle-pw{width:38px;height:38px;padding:0;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;color:#5C6B7E;background:transparent;border:0;cursor:pointer;position:absolute;right:6px;top:50%;transform:translateY(-50%);z-index:5}
button.toggle-pw:hover{background:#F1F4F8;color:#28B8F8}
button.toggle-pw svg{width:18px;height:18px;pointer-events:none}
.ctrl input[type=password],.ctrl input[type=text]{padding-right:48px}
/* ─── Thông báo (app mới) ─── */
.alert{padding:11px 14px;border-radius:10px;font-size:13px;line-height:1.5;margin-bottom:14px;border:1px solid}
.alert ul{margin:0;padding-left:18px}
.alert-error{background:#FFF1F2;border-color:#FECDD3;color:#9F1239}
.alert-success{background:#ECFDF5;border-color:#A7F3D0;color:#065F46}
/* Như bản gốc: chỉ 1 khung form ở giữa */
.auth-wrap{display:block;min-height:auto}
.auth-card{max-width:480px;margin:0 auto}
@media (max-width:600px){.auth-wrap{padding:24px 0 48px}.auth-card{max-width:100%}}
/* ─── OTP / quên mật khẩu (app mới) ─── */
.auth-card .pane.solo{display:block;padding-top:26px}
.otp-input{width:100%;font-size:28px;letter-spacing:12px;text-align:center;font-weight:700;padding:12px 10px;border:1.5px solid var(--line);border-radius:12px;font-family:inherit;color:var(--ink)}
.otp-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 4px rgba(40,184,248,.12)}
.sent-to{background:var(--primary-soft);border-radius:10px;padding:10px 12px;font-size:13px;color:var(--ink-2);margin-bottom:14px}
.sent-to b{color:var(--primary-dark)}
.row-links{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;margin-top:14px;font-size:13px}
.row-links form{margin:0}
.link-btn{background:none;border:0;padding:0;color:var(--primary-dark);font-weight:600;font-size:13px;cursor:pointer;font-family:inherit}
.link-btn:disabled{color:var(--muted);cursor:default}
.forgot-link{display:block;text-align:right;font-size:12.5px;margin:-4px 0 12px}
.forgot-link a{color:var(--primary-dark);font-weight:600}

/* ─── Mobile: vùng chạm ≥40px, nút gửi 44px ─── */
@media (max-width:600px){
  button.toggle-pw,.field .toggle-pw{width:44px;height:44px}
  .link-btn,.row-links .link{min-height:40px;display:inline-flex;align-items:center}
  .btn-submit{min-height:48px}
  .tabs .tab{min-height:44px}
  .otp-input{font-size:26px}
}