:root{--ink:#17222f;--muted:#657586;--brand:#0f766e;--brand-dark:#115e59;--paper:#fff;--canvas:#f6f8fa;--line:#dfe7eb;--accent:#f59e0b;--danger:#b42318;--shadow:0 16px 44px rgba(20,42,58,.1)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--canvas);color:var(--ink);font:16px/1.55 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:inherit;text-decoration:none}[hidden]{display:none!important}.container{width:min(1120px,calc(100% - 32px));margin:auto}.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}.nav{min-height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-weight:800;font-size:1.1rem;color:var(--brand-dark)}.brand b{display:inline-grid;place-items:center;width:28px;height:28px;background:var(--brand);color:#fff;border-radius:8px;margin-right:8px}.nav-links{display:flex;align-items:center;gap:18px;font-size:.94rem}.nav-links a:hover{color:var(--brand)}.nav-account{font-weight:750;color:var(--brand-dark)}.nav-logout{background:transparent;color:var(--danger);padding:7px 4px}.nav-logout:hover{background:transparent;text-decoration:underline}.hero{padding:74px 0 64px;background:linear-gradient(125deg,#d9f4ef,#fdf5e5)}.eyebrow{font-size:.78rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--brand-dark)}h1{font-size:clamp(2.2rem,6vw,4.4rem);line-height:1.05;max-width:720px;margin:12px 0 16px;letter-spacing:-.04em}.lead{color:#38505e;max-width:650px;font-size:1.08rem}.search{margin-top:30px;background:#fff;padding:12px;display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:8px;border-radius:14px;box-shadow:var(--shadow)}input,select,button{font:inherit}input,select{width:100%;border:1px solid var(--line);border-radius:9px;padding:12px;background:#fff;color:var(--ink)}button,.button{border:0;border-radius:9px;padding:12px 18px;background:var(--brand);color:#fff;font-weight:750;cursor:pointer;text-align:center}button:disabled{cursor:wait;opacity:.65}.button:hover,button:hover{background:var(--brand-dark)}.button-secondary{background:#e7f7f4;color:var(--brand-dark)}main{padding:48px 0 72px}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:20px}.section-head h2{font-size:1.65rem;margin:0}.section-head p,.empty,.note{color:var(--muted);margin:4px 0 0}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{display:flex;flex-direction:column;min-height:315px;background:var(--paper);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 4px 16px rgba(20,42,58,.04);transition:transform .15s}.card:hover{transform:translateY(-3px)}.photo{height:148px;background:linear-gradient(135deg,#bfdbfe,#d1fae5);display:grid;place-items:center;color:var(--brand-dark);font-weight:800}.photo img{width:100%;height:100%;object-fit:cover}.card-body{padding:17px;display:flex;flex-direction:column;flex:1}.meta{font-size:.84rem;color:var(--muted)}.card h3{font-size:1.1rem;line-height:1.3;margin:8px 0}.price{font-size:1.15rem;font-weight:800;color:var(--brand-dark);margin-top:auto}.detail{display:grid;grid-template-columns:1.2fr 1fr;gap:28px}.detail-image{min-height:330px;border-radius:18px;background:linear-gradient(135deg,#bfdbfe,#d1fae5);display:grid;place-items:center;font-size:1.2rem;font-weight:800;color:var(--brand-dark);overflow:hidden}.detail-image img{width:100%;height:100%;object-fit:cover}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 4px 16px rgba(20,42,58,.04)}.panel h1{font-size:2rem;margin:0 0 12px}.facts{display:flex;gap:18px;margin:16px 0;color:var(--muted)}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{background:#e7f7f4;color:#0f605a;border-radius:999px;padding:5px 10px;font-size:.85rem}.contact{margin-top:18px;background:#f6f8fa;border-radius:12px;padding:16px}.contact form{display:grid;gap:10px}.alert{padding:12px 16px;border-radius:10px;background:#fff5db;color:#795400;margin:0 0 22px;border:1px solid #f7d98d}.alert a{text-decoration:underline;font-weight:700}.footer{background:#102a2f;color:#dce9e8;padding:32px 0;font-size:.93rem}.footer .container{display:flex;justify-content:space-between;gap:20px}.demo{background:#fffbeb;color:#92400e;padding:8px 0;font-size:.85rem;text-align:center}.back{display:inline-block;margin-bottom:18px;color:var(--brand-dark);font-weight:700}.auth-page{min-height:calc(100vh - 190px);display:grid;place-items:center}.auth-card{width:min(500px,100%);background:#fff;border:1px solid var(--line);border-radius:20px;padding:32px;box-shadow:var(--shadow)}.auth-card h1{font-size:2.2rem}.auth-form{display:grid;gap:16px;margin-top:26px}.auth-form label{font-weight:700;font-size:.92rem}.auth-form input{display:block;margin-top:6px}.auth-help{margin:22px 0 0;color:var(--muted);font-size:.9rem}.form-message{margin:0;padding:10px 12px;border-radius:8px;background:#fff0ee;color:var(--danger)}.portal-page{min-height:70vh}.portal-loading{padding:40px 0;color:var(--muted)}.portal-welcome{display:flex;align-items:end;justify-content:space-between;gap:24px}.portal-welcome h1{font-size:2.4rem;margin:8px 0}.portal-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:28px 0}.portal-summary article{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}.portal-summary span{display:block;color:var(--muted);font-size:.9rem}.portal-summary strong{display:block;margin-top:6px;font-size:1.45rem}.invoice-section{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}.status-filter{font-size:.85rem;font-weight:700}.status-filter select{margin-top:5px;min-width:210px}.invoice-list{display:grid;gap:10px}.invoice-item{width:100%;display:flex;justify-content:space-between;gap:20px;align-items:center;background:#fff;color:var(--ink);border:1px solid var(--line);padding:16px;text-align:left}.invoice-item:hover{background:#f7fbfa}.invoice-item>div{display:grid;gap:4px}.invoice-item>div:last-child{text-align:right;justify-items:end}.invoice-item small{color:var(--muted)}.invoice-status{display:inline-flex;width:max-content;border-radius:999px;background:#eef3f5;padding:4px 9px;font-size:.76rem;font-weight:800;color:#435564}.status-da_thanh_toan{background:#dcfce7;color:#166534}.status-qua_han{background:#fee2e2;color:#991b1b}.status-thanh_toan_mot_phan{background:#fef3c7;color:#92400e}.status-da_huy{background:#f1f5f9;color:#64748b}.invoice-dialog{width:min(680px,calc(100% - 28px));max-height:88vh;border:0;border-radius:18px;padding:28px;box-shadow:0 28px 80px rgba(0,0,0,.25)}.invoice-dialog::backdrop{background:rgba(9,22,30,.55)}.dialog-close{position:absolute;right:14px;top:12px;background:transparent;color:var(--muted);font-size:1.6rem;padding:4px 10px}.dialog-close:hover{background:#eef3f5}.invoice-dialog h2{margin:10px 0 4px}.invoice-dialog h3{margin:24px 0 8px}.detail-totals{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:20px 0}.detail-totals>div{background:#f6f8fa;border-radius:10px;padding:12px}.detail-totals span,.detail-totals strong{display:block}.detail-totals span{font-size:.8rem;color:var(--muted)}.invoice-lines{border-top:1px solid var(--line)}.invoice-lines>div{display:flex;justify-content:space-between;gap:20px;padding:11px 0;border-bottom:1px solid var(--line)}@media(max-width:780px){.nav{align-items:flex-start;padding:14px 0}.nav-links{gap:10px;flex-wrap:wrap;justify-content:flex-end}.nav-links>a:not(.nav-account),.nav-logout{display:none}.hero{padding:52px 0}.search{grid-template-columns:1fr}.cards,.detail,.portal-summary{grid-template-columns:1fr}.detail-image{min-height:220px}.footer .container{display:block}.section-head,.portal-welcome{display:block}.status-filter{display:block;margin-top:14px}.invoice-item{align-items:flex-start}.invoice-item>div:last-child{text-align:left;justify-items:start}.detail-totals{grid-template-columns:1fr}.auth-card{padding:24px}}