/* Trang web chính mitaa.vn — nền sáng, chữ lớn kiểu tạp chí, một khối 3D khung dây đổi hình theo từng khu
   (mitaa.js). Chỉ tông sáng. */
:root {
  --nen: #ecebe7;
  --nen-2: #f6f5f2;
  --muc: #0c0c0b;
  --mo: #5f5c57;
  --vach: rgba(12, 12, 11, .14);
  --nhan: #c8102e;
  --tren-nhan: #ffffff;
  --le: clamp(16px, 4vw, 56px);
  --hien-thi: "Anton", "Oswald", Impact, "Arial Narrow", sans-serif;
  --than: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  --may: "JetBrains Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--nen); color: var(--muc); font: 400 16px/1.6 var(--than); overflow-x: hidden; }
a { color: inherit; }
img, svg { display: block; }
::selection { background: var(--nhan); color: var(--tren-nhan); }
:focus-visible { outline: 2px solid var(--nhan); outline-offset: 3px; }

.may { font-family: var(--may); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }
.vien { color: transparent; -webkit-text-stroke: 1.5px var(--muc); }
@supports not (-webkit-text-stroke: 1px black) { .vien { color: var(--muc); } }
.do { color: var(--nhan); }

/* ------------------------------------------------------------ khối 3D (cố định, sau nội dung) */
#canh { position: fixed; top: 0; right: 0; width: 52vw; height: 100vh; height: 100svh; z-index: 0; pointer-events: none;
        transition: opacity .7s ease; }
#nhan-3d { position: fixed; top: 0; right: 0; width: 52vw; height: 100vh; height: 100svh; z-index: 1; pointer-events: none; }
.nhan-diem { position: absolute; left: 0; top: 0; display: flex; align-items: center; gap: 8px; white-space: nowrap;
             font-family: var(--may); font-size: 11px; letter-spacing: .06em; text-transform: uppercase;
             will-change: transform, opacity; }
.nhan-diem::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--nhan);
                     box-shadow: 0 0 0 4px color-mix(in srgb, var(--nhan) 18%, transparent); flex: none; }
.nhan-diem span { background: var(--nen-2); border: 1px solid var(--vach); padding: 3px 7px; }

/* ------------------------------------------------------------ đầu trang */
/* Đầu trang luôn đặc (không làm mờ nền — chữ lớn phía sau bị nhoè thành vệt), vạch đỏ trên cùng, vạch đen dưới. */
.dau { position: fixed; inset: 0 0 auto 0; z-index: 20; display: flex; align-items: center; justify-content: space-between;
       gap: 16px; padding: 16px var(--le); background: var(--nen-2); border-top: 3px solid var(--nhan);
       border-bottom: 1px solid var(--muc); transition: padding .25s, box-shadow .25s; }
.dau.da-cuon { padding-block: 10px; box-shadow: 0 8px 24px -16px rgba(12, 12, 11, .35); }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.logo svg { width: 38px; height: 38px; color: var(--nhan); }
.logo b { display: block; font: 400 26px/1 var(--hien-thi); letter-spacing: .04em; }
.logo small { display: block; margin-top: 3px; font-family: var(--may); font-size: 9.5px; letter-spacing: .08em; color: var(--mo);
              text-transform: uppercase; }
.menu { display: flex; align-items: center; gap: 6px; }
.menu a { text-decoration: none; padding: 6px 10px; font-size: 13px; position: relative; }
.menu a:not(.nut)::after { content: ""; position: absolute; left: 10px; right: 10px; bottom: 0; height: 2px; background: var(--nhan);
                           transform: scaleX(0); transform-origin: left; transition: transform .25s; }
.menu a:not(.nut):hover, .menu a.dang-o { color: var(--nhan); }
.menu a:not(.nut):hover::after, .menu a.dang-o::after { transform: scaleX(1); }
.nut-menu { display: none; background: none; border: 0; color: var(--muc); padding: 6px 0; cursor: pointer; font-weight: 500; }

.nut { display: inline-flex; align-items: center; gap: 10px; padding: 12px 20px; border: 1px solid var(--muc);
       background: var(--muc); color: var(--nen); text-decoration: none; font: 600 15px/1.2 var(--than); cursor: pointer;
       transition: background .2s, color .2s, border-color .2s; }
.nut:hover { background: var(--nhan); border-color: var(--nhan); color: var(--tren-nhan); }
.nut.rong { background: transparent; color: var(--muc); }
.nut.rong:hover { background: var(--muc); color: var(--nen); border-color: var(--muc); }
.menu .nut { padding: 11px 20px; font-size: 14px; margin-left: 10px; background: var(--nhan); border-color: var(--nhan);
             color: var(--tren-nhan); }
.menu .nut:hover { background: var(--muc); border-color: var(--muc); color: var(--nen); }
.nut .mui { transition: transform .2s; }
.nut:hover .mui { transform: translateX(3px); }

/* ------------------------------------------------------------ khung chung */
main { position: relative; z-index: 2; }
.khung { padding: 0 var(--le); max-width: 1600px; margin: 0 auto; }
section { position: relative; }
.vach-tren { border-top: 1px solid var(--vach); }
.dong-nhan { display: flex; justify-content: space-between; gap: 16px; padding: 22px 0; color: var(--mo); }

/* ------------------------------------------------------------ mở đầu */
.mo-dau { min-height: 100vh; min-height: 100svh; display: flex; flex-direction: column; justify-content: space-between;
          padding-top: 110px; }
.tieu-de-lon { font: 400 clamp(60px, 10vw, 184px)/1.16 var(--hien-thi); text-transform: uppercase; margin: 0;
               letter-spacing: .005em; }
.tieu-de-lon .lui { display: block; padding-left: 4vw; }
.mo-dau .dan { max-width: 520px; margin: 28px 0 0; font-size: clamp(16px, 1.35vw, 19px); color: var(--mo); }
.mo-dau .hanh-dong { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.chan-mo-dau { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; padding: 40px 0 28px; }
.chan-mo-dau p { margin: 0; max-width: 420px; text-align: right; line-height: 1.7; }
.cuon { display: inline-flex; gap: 10px; align-items: center; text-decoration: none; }
.cuon i { display: inline-block; font-style: normal; animation: nhun 1.8s ease-in-out infinite; }
@keyframes nhun { 50% { transform: translateY(4px); } }

/* ------------------------------------------------------------ hai sản phẩm */
.khu { min-height: 100vh; display: flex; align-items: center; padding-block: 140px 100px; }
.khu-chu { width: min(48%, 680px); }
.khu .so-khu { display: flex; align-items: center; gap: 14px; color: var(--mo); margin: 0 0 22px; }
.khu .so-khu::after { content: ""; flex: 1; max-width: 120px; height: 1px; background: var(--vach); }
.khu h2 { font: 400 clamp(54px, 7.4vw, 132px)/1.2 var(--hien-thi); text-transform: uppercase; margin: 0 0 26px; }
.khu .dan { font-size: clamp(18px, 1.6vw, 23px); line-height: 1.5; margin: 0 0 36px; max-width: 30ch; }
.tinh-nang { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--vach); }
.tinh-nang li { padding: 18px 18px 18px 0; border-bottom: 1px solid var(--vach); }
.tinh-nang li:nth-child(odd) { border-right: 1px solid var(--vach); }
.tinh-nang li:nth-child(even) { padding-left: 18px; }
.tinh-nang b { display: block; font-weight: 600; margin-bottom: 4px; }
.tinh-nang span { color: var(--mo); font-size: 14.5px; line-height: 1.5; }
.goi-kem { margin: 24px 0 0; color: var(--mo); }
.goi-kem b { color: var(--muc); font-weight: 500; }

/* ------------------------------------------------------------ đầu mục */
.bat-dau h2, .bang-gia h2 {
  font: 400 clamp(40px, 5.6vw, 92px)/1.16 var(--hien-thi); text-transform: uppercase; margin: 0; }
.dau-muc { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: end; margin-bottom: 48px; }
.dau-muc p { margin: 0; color: var(--mo); max-width: 46ch; justify-self: end; }
.nen-dam { background: var(--nen-2); }

/* ------------------------------------------------------------ bắt đầu */
.bat-dau { padding-block: 110px; }
.buoc { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
        counter-reset: buoc; border-top: 1px solid var(--muc); }
.buoc li { padding: 28px 24px 0 0; counter-increment: buoc; }
.buoc li + li { padding-left: 24px; border-left: 1px solid var(--vach); }
.buoc li::before { content: counter(buoc, decimal-leading-zero); display: block; font: 400 clamp(56px, 6vw, 96px)/1 var(--hien-thi);
                   color: transparent; -webkit-text-stroke: 1.2px var(--muc); margin-bottom: 26px; }
.buoc h3 { margin: 0 0 8px; font-size: 19px; font-weight: 600; }
.buoc p { margin: 0; color: var(--mo); font-size: 15px; }
.buoc code { font-family: var(--may); font-size: 13px; background: var(--nen); padding: 1px 5px; border: 1px solid var(--vach); }

/* ------------------------------------------------------------ bảng giá */
.bang-gia { padding-block: 110px; }
.chon-ky { display: inline-flex; border: 1px solid var(--muc); margin-top: 24px; }
.chon-ky button { font: 500 14px/1 var(--than); padding: 11px 18px; background: transparent; color: var(--muc); border: 0; cursor: pointer; }
.chon-ky button[aria-pressed="true"] { background: var(--muc); color: var(--nen); }
.chon-ky small { font-family: var(--may); font-size: 11px; color: var(--nhan); margin-left: 6px; }
.chon-ky button[aria-pressed="true"] small { color: inherit; opacity: .75; }
.cac-goi { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--muc); background: var(--nen); }
.goi { padding: 30px 26px 30px; display: flex; flex-direction: column; border-right: 1px solid var(--vach); position: relative; }
.goi:last-child { border-right: 0; }
.goi .ten-goi { display: flex; justify-content: space-between; align-items: center; margin-bottom: 28px; }
.goi h3 { font: 400 34px/1 var(--hien-thi); text-transform: uppercase; margin: 0; letter-spacing: .02em; }
.goi .the-nho { font-family: var(--may); font-size: 10.5px; letter-spacing: .06em; text-transform: uppercase; padding: 4px 7px;
                border: 1px solid currentColor; }
.goi .gia { font: 400 clamp(38px, 3.4vw, 54px)/1 var(--hien-thi); margin: 0; font-variant-numeric: tabular-nums; }
.goi .gia small { font: 400 15px/1 var(--than); color: var(--mo); margin-left: 4px; }
.goi .tong { margin: 10px 0 0; color: var(--mo); font-size: 14px; min-height: 2.9em; }
.goi .tang { color: var(--nhan); font-weight: 600; }
.goi ul { list-style: none; margin: 22px 0 28px; padding: 18px 0 0; border-top: 1px solid var(--vach); flex: 1; }
.goi li { padding: 5px 0 5px 22px; position: relative; font-size: 15px; }
.goi li::before { content: ""; position: absolute; left: 2px; top: 13px; width: 9px; height: 1.5px; background: var(--nhan); }
.goi li.dau-dong { padding-left: 0; color: var(--mo); font-size: 13px; }
.goi li.dau-dong::before { display: none; }
.goi .nut { justify-content: center; }
/* Standard được đẩy lên: nhô lên khỏi hàng, viền đen đậm, vạch đỏ trên, nhãn đỏ đặc, nút đỏ */
.goi.noi { background: #fff; box-shadow: inset 0 4px 0 var(--nhan), 0 24px 48px -28px rgba(12, 12, 11, .45);
           outline: 2px solid var(--muc); outline-offset: -1px; margin: -18px 0; padding-block: 48px; z-index: 1; }
.goi.noi .the-nho { background: var(--nhan); border-color: var(--nhan); color: #fff; }
.goi.noi .gia { color: var(--nhan); }
.goi.noi .nut { background: var(--nhan); border-color: var(--nhan); color: #fff; }
.goi.noi .nut:hover { background: var(--muc); border-color: var(--muc); }
.goi .the-nho.phu { color: var(--mo); }
.ghi-gia { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px; margin: 18px 0 0; color: var(--mo); font-size: 14px; }


/* ------------------------------------------------------------ liên hệ */
.lien-he { padding-block: 120px 110px; min-height: 70vh; display: flex; flex-direction: column; justify-content: center; }
.lien-he h2 { font: 400 clamp(56px, 9vw, 160px)/1.16 var(--hien-thi); text-transform: uppercase; margin: 0 0 40px; }
.cach-lien-he { display: grid; grid-template-columns: 1fr 1fr; max-width: 840px; border-top: 1px solid var(--muc); }
.cach-lien-he a { display: block; padding: 22px 24px 22px 0; text-decoration: none; border-bottom: 1px solid var(--vach); }
.cach-lien-he a + a { padding-left: 24px; border-left: 1px solid var(--vach); }
.cach-lien-he .may { display: block; color: var(--mo); margin-bottom: 8px; }
.cach-lien-he b { font-size: clamp(20px, 2vw, 28px); font-weight: 600; }
.cach-lien-he a:hover b { color: var(--nhan); }

/* ------------------------------------------------------------ chân trang */
/* Chân trang gọn: cột liên kết có số chữ máy; nút tròn "lên đầu trang" cố định góc phải dưới. */
.chan { position: relative; z-index: 2; background: var(--nen-2); color: var(--muc); border-top: 1px solid var(--muc); overflow: hidden; }
/* dải chữ chạy ngang */
.chay-chu { overflow: hidden; border-bottom: 1px solid var(--muc); padding: 16px 0; white-space: nowrap; font-size: 13px; }
.chay-chu > div { display: inline-flex; animation: chay 40s linear infinite; }
.chay-chu span { padding-right: 0; }
.chay-chu i { font-style: normal; color: var(--nhan); margin: 0 18px; }
.chay-chu:hover > div { animation-play-state: paused; }
@keyframes chay { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .chay-chu > div { animation: none; } }
.chan .luoi-chan { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-top: 64px; }
.thong-so { display: flex; gap: 32px; flex-wrap: wrap; margin: 26px 0 28px; }
.thong-so dt { color: var(--mo); margin-bottom: 6px; font-size: 11px; }
.thong-so dd { margin: 0; font-size: 14px; color: var(--muc); font-variant-numeric: tabular-nums; }
.thong-so dd a { text-decoration: none; border-bottom: 1px solid var(--nhan); }
#gio-vn::after { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--nhan);
                 margin-left: 8px; vertical-align: middle; animation: nhap 2s ease-in-out infinite; }
@keyframes nhap { 50% { opacity: .2; } }
.chan h4 { margin: 0 0 16px; padding-bottom: 12px; border-bottom: 1px solid var(--muc); font-family: var(--may); font-size: 11px;
           letter-spacing: .08em; text-transform: uppercase; font-weight: 500; color: var(--muc); }
.chan h4 span { color: var(--nhan); margin-right: 6px; }
.chan ul { list-style: none; margin: 0; padding: 0; }
.chan li { padding: 5px 0; }
.chan li a { text-decoration: none; display: inline-flex; gap: 8px; align-items: center; transition: color .2s, transform .2s; }
.chan li a::after { content: "→"; opacity: 0; transform: translateX(-6px); transition: opacity .2s, transform .2s; color: var(--nhan); }
.chan li a:hover { color: var(--nhan); }
.chan li a:hover::after { opacity: 1; transform: none; }
.chan .logo b { font-size: 40px; }
.chan .logo svg { width: 46px; height: 46px; color: var(--nhan); }
.chan .gioi-thieu { margin: 18px 0 0; max-width: 36ch; color: var(--mo); font-size: 15px; }
.chan .dong-cuoi { display: flex; justify-content: space-between; gap: 16px; margin-top: 64px; padding: 18px 76px 22px 0;
                   border-top: 1px solid var(--muc); color: var(--mo); }
.ve-dau { position: fixed; right: 24px; bottom: 24px; z-index: 30; width: 48px; height: 48px; display: grid; place-items: center;
          border: 1px solid var(--muc); border-radius: 50%; background: var(--nen-2); color: var(--muc); cursor: pointer;
          opacity: 0; visibility: hidden; transform: translateY(12px);
          transition: opacity .25s, visibility .25s, transform .25s, background .2s, color .2s, border-color .2s; }
.ve-dau .mui-len { width: 20px; height: 20px; }
/* vòng tiến độ đọc trang quanh nút */
.ve-dau .tien-do { position: absolute; inset: -5px; width: calc(100% + 10px); height: calc(100% + 10px); transform: rotate(-90deg); }
.ve-dau .tien-do circle { fill: none; stroke-width: 2.5; }
.ve-dau .tien-do .ray { stroke: var(--vach); }
.ve-dau .tien-do .da-doc { stroke: var(--nhan); stroke-dasharray: 150.8; stroke-dashoffset: 150.8; transition: stroke-dashoffset .1s linear; }
.ve-dau.hien-nut { opacity: 1; visibility: visible; transform: none; }
.ve-dau:hover { background: var(--nhan); border-color: var(--nhan); color: #fff; }
@media (max-width: 600px) { .ve-dau { right: 16px; bottom: 16px; width: 44px; height: 44px; } }

/* ------------------------------------------------------------ hiện dần khi cuộn tới */
.hien { opacity: 0; transform: translateY(28px); transition: opacity .9s cubic-bezier(.2,.7,.2,1), transform .9s cubic-bezier(.2,.7,.2,1); }
.hien.da-hien { opacity: 1; transform: none; }
.mo-dau .tieu-de-lon > span { display: block; opacity: 0; transform: translateY(40px); animation: len 1s cubic-bezier(.2,.7,.2,1) forwards; }
.mo-dau .tieu-de-lon > span:nth-child(2) { animation-delay: .12s; }
.mo-dau .tieu-de-lon > span:nth-child(3) { animation-delay: .24s; }
@keyframes len { to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) {
  .hien, .mo-dau .tieu-de-lon > span { opacity: 1; transform: none; animation: none; transition: none; }
  .cuon i { animation: none; }
}
html:not(.co-js) .hien { opacity: 1; transform: none; }

/* ------------------------------------------------------------ màn hẹp */
@media (max-width: 1100px) {
  .chan .luoi-chan { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  #canh, #nhan-3d { width: 100vw; }
  #nhan-3d { display: none; }
  .nut-menu { display: block; }
  .menu { position: fixed; inset: 0; z-index: -1; flex-direction: column; align-items: flex-start; justify-content: center; gap: 4px;
          padding: 90px var(--le) 40px; background: var(--nen); opacity: 0; visibility: hidden; transition: opacity .25s, visibility .25s; }
  .menu a { font: 400 40px/1.15 var(--hien-thi); text-transform: uppercase; padding: 4px 0; letter-spacing: .01em; }
  .menu .nut { font: 600 16px/1.2 var(--than); text-transform: none; margin: 22px 0 0; padding: 14px 22px; }
  .dau.mo-menu .menu { opacity: 1; visibility: visible; }
  .dau.mo-menu { background: var(--nen); }
  .tieu-de-lon .lui { padding-left: 0; }
  .chan-mo-dau { flex-direction: column; align-items: flex-start; }
  .chan-mo-dau p { text-align: left; }
  .khu { min-height: 0; padding-block: 100px 70px; }
  .khu-chu { width: 100%; }
  .tinh-nang { grid-template-columns: 1fr; }
  .tinh-nang li:nth-child(odd) { border-right: 0; }
  .tinh-nang li:nth-child(even) { padding-left: 0; }
  .dau-muc { grid-template-columns: 1fr; gap: 20px; }
  .dau-muc p { justify-self: start; }
  .cac-goi { grid-template-columns: 1fr; }
  .goi { border-right: 0; border-bottom: 1px solid var(--vach); }
  .goi.noi { margin: 0; padding-block: 36px; order: -1; }
  .goi:last-child { border-bottom: 0; }
  .buoc { grid-template-columns: 1fr; }
  .buoc li, .buoc li + li { padding: 24px 0; border-left: 0; border-bottom: 1px solid var(--vach); }
  .cach-lien-he { grid-template-columns: 1fr; }
  .cach-lien-he a + a { padding-left: 0; border-left: 0; }
}
@media (max-width: 600px) {
  .chan .luoi-chan { grid-template-columns: 1fr 1fr; gap: 28px 20px; padding-top: 32px; }
  .chan .luoi-chan > div:first-child { grid-column: 1 / -1; }
  .chan .dong-cuoi { flex-direction: column; }
}