/* Lạnh Chuẩn (dien-lanh-sua-chua 4.5): a technical manual. Blueprint-grid paper, navy ink, signal blue, a small red
   warning tag; numbered header and contents list, a symptom lookup table, service cards that read like spec sheets,
   framed figures with captions. Fonts: Space Grotesk (headings) + Be Vietnam Pro (text). */
:root {
  --paper: #eef4fb;
  --white: #ffffff;
  --navy: #0e2747;
  --blue: #1565c0;
  --blue-2: #0d4a94;
  --red: #d8402f;
  --ink: #13243b;
  --mute: #5d6f86;
  --line: rgba(14, 39, 71, 0.2);
  --grid: rgba(21, 101, 192, 0.07);
  --k-font: 'Be Vietnam Pro', system-ui, sans-serif;
  --k-font-display: 'Space Grotesk', system-ui, sans-serif;
  --k-accent: #0e2747;
  --k-accent-ink: #ffffff;
  --k-ink: #13243b;
  --k-paper: #ffffff;
  --k-muted: #5d6f86;
  --k-line: rgba(14, 39, 71, 0.22);
  --k-radius: 4px;
}

body {
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--ink);
  font: 400 16px/1.6 'Be Vietnam Pro', system-ui, sans-serif;
  padding-bottom: 68px;
}
a {
  color: inherit;
}
h1,
h2,
h3 {
  margin: 0;
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-weight: 700;
  letter-spacing: -0.015em;
}
p {
  margin: 0 0 12px;
}
.plain {
  margin: 0;
  padding: 0;
  list-style: none;
}
.muted {
  color: var(--mute);
}
.wrap {
  width: min(1160px, 100% - 32px);
  margin-inline: auto;
}
.tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 10px;
  border: 1.5px solid var(--navy);
  font: 700 12px/1.5 'Space Grotesk', sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--navy);
}
.big {
  margin-bottom: 14px;
  font-size: clamp(32px, 8.4vw, 58px);
  line-height: 1.06;
  color: var(--navy);
}
.big-sm {
  font-size: clamp(30px, 7.4vw, 44px);
}
.h2 {
  margin-bottom: 16px;
  font-size: clamp(25px, 6vw, 36px);
  line-height: 1.12;
  color: var(--navy);
}
.lead {
  font-size: 18px;
  color: var(--mute);
}
.note-line {
  margin-bottom: 18px;
  padding-left: 12px;
  border-left: 4px solid var(--red);
  color: var(--mute);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 22px;
  border: 2px solid var(--navy);
  border-radius: 4px;
  background: var(--navy);
  color: #fff;
  font: 700 15px/1 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  text-decoration: none;
  cursor: pointer;
}
.btn-line {
  background: transparent;
  color: var(--navy);
}
.btn-sm {
  min-height: 42px;
  padding: 0 16px;
  font-size: 13px;
}
.btn-block {
  width: 100%;
}
.link {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  white-space: nowrap;
  color: var(--blue-2);
  font: 700 15px/1 'Space Grotesk', sans-serif;
  text-decoration: none;
  border-bottom: 2px solid var(--blue);
  padding-bottom: 3px;
}
.back {
  margin-bottom: 18px;
}
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* header */
.hdr {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--white);
  border-bottom: 2px solid var(--navy);
}
.hdr-in {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: min(1160px, 100% - 24px);
  margin-inline: auto;
  padding: 8px 0;
}
.brand {
  display: grid;
  text-decoration: none;
  color: var(--navy);
}
.brand-name {
  font: 700 24px/1 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}
.brand-tag {
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
}
.hdr-menu {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--navy);
  background: transparent;
  color: var(--navy);
  cursor: pointer;
}
.menu {
  display: none;
  position: absolute;
  top: 100%;
  left: -12px;
  right: -12px;
  flex-direction: column;
  padding: 4px 16px 12px;
  background: var(--white);
  border-bottom: 2px solid var(--navy);
}
.menu[data-open] {
  display: flex;
}
.menu a {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font: 700 19px/1.2 'Space Grotesk', sans-serif;
  text-decoration: none;
}
.menu i {
  font-style: normal;
  color: var(--blue);
}
.menu a[aria-current] {
  color: var(--blue);
}

/* hero */
.hero {
  display: grid;
  gap: 24px;
  padding: 28px 0 8px;
}
.frame {
  padding: 8px;
  background: var(--white);
  border: 1.5px solid var(--navy);
  position: relative;
}
.frame::before,
.frame::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 3px solid var(--red);
}
.frame::before {
  left: -5px;
  top: -5px;
  border-right: 0;
  border-bottom: 0;
}
.frame::after {
  right: -5px;
  bottom: -5px;
  border-left: 0;
  border-top: 0;
}
.frame img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.hero-fig,
.pd-fig,
.art-fig {
  margin: 0;
}
.hero-fig figcaption,
.pd-fig figcaption {
  margin-top: 10px;
  font-size: 14px;
  color: var(--mute);
}
.hero-fig b {
  color: var(--navy);
}

/* sections */
.sec {
  padding: 48px 0 0;
}
.sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 8px 16px;
}

/* lookup table */
.table {
  border: 2px solid var(--navy);
  background: var(--white);
}
.tr {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-top: 1px solid var(--line);
}
.tr:first-child {
  border-top: 0;
}
.tr.th {
  display: none;
}
.tr span:nth-child(2) {
  font-size: 15px;
  color: var(--mute);
}
.tr.th span:nth-child(2) {
  color: #fff;
}
.tr a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--blue-2);
  font: 700 16px/1.3 'Space Grotesk', sans-serif;
  text-decoration: none;
}
.tr span:first-child {
  font-weight: 600;
}

/* contents */
.toc {
  counter-reset: n;
  border-top: 2px solid var(--navy);
}
.toc-row {
  counter-increment: n;
  display: grid;
  grid-template-columns: 44px 1fr auto auto;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}
.toc-row::before {
  content: counter(n, decimal-leading-zero);
  font: 700 18px/1 'Space Grotesk', sans-serif;
  color: var(--blue);
}
.toc-name {
  font: 700 20px/1.2 'Space Grotesk', sans-serif;
}
.toc-count {
  font-size: 14px;
  color: var(--mute);
}

/* spec cards */
.specs {
  display: grid;
  gap: 14px;
}
.spec {
  display: grid;
  background: var(--white);
  border: 1.5px solid var(--navy);
}
.spec-img {
  position: relative;
  display: block;
}
.spec-img img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.spec-fig {
  display: none;
}
.spec-body {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 14px 16px 16px;
}
.spec-cat {
  margin: 0 0 4px;
  font: 700 12px/1.3 'Space Grotesk', sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--red);
}
.spec-name {
  font-size: 20px;
  line-height: 1.2;
}
.spec-name a {
  text-decoration: none;
}
.spec-short {
  margin: 6px 0 10px;
  font-size: 15px;
  color: var(--mute);
}
.spec-rows {
  width: 100%;
  margin: 0 0 14px;
  border-top: 1px solid var(--line);
}
.spec-rows div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
}
.spec-rows dt {
  color: var(--mute);
  font-size: 14px;
}
.spec-rows dd {
  margin: 0;
  font: 700 16px/1.3 'Space Grotesk', sans-serif;
  text-align: right;
}
.spec .btn {
  margin-top: auto;
}

/* stats */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin: 0;
  background: var(--white);
  border: 2px solid var(--navy);
}
.stats div {
  padding: 16px;
  border-top: 1px solid var(--line);
}
.stats div:nth-of-type(-n + 2) {
  border-top: 0;
}
.stats div:nth-of-type(odd) {
  border-right: 1px solid var(--line);
}
.stats dd {
  margin: 0;
  font: 700 32px/1.1 'Space Grotesk', sans-serif;
  color: var(--blue);
}
.stats dt {
  font-size: 14px;
  color: var(--mute);
}

/* flow */
.flow {
  display: grid;
  gap: 10px;
}
.flow li {
  display: flex;
  gap: 14px;
  align-items: center;
  padding: 12px 14px;
  background: var(--white);
  border: 1px solid var(--line);
}
.flow b {
  display: grid;
  place-items: center;
  flex: none;
  width: 36px;
  height: 36px;
  background: var(--navy);
  color: #fff;
  font: 700 17px/1 'Space Grotesk', sans-serif;
}

/* works */
.works {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.works img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border: 1.5px solid var(--navy);
}

/* feedback */
.fb {
  display: grid;
  gap: 12px;
}
.fb-item {
  margin: 0;
  background: var(--white);
  border: 1.5px solid var(--navy);
}
.fb-item figcaption {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 10px;
  padding: 10px 16px;
  border-bottom: 1.5px solid var(--navy);
  background: var(--navy);
  color: #fff;
  font-size: 14px;
}
.fb-item figcaption span {
  color: #b6c6dc;
}
.fb-item .fb-stars {
  margin-left: auto;
  color: #ffd166;
}
.fb-item blockquote {
  margin: 0;
  padding: 16px;
}

/* manual (articles) */
.manual {
  border-top: 2px solid var(--navy);
}
.man {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 2px 14px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}
.man img {
  grid-row: span 2;
  width: 76px;
  height: 76px;
  object-fit: cover;
  border: 1.5px solid var(--navy);
}
.man-date {
  font: 700 13px/1.3 'Space Grotesk', sans-serif;
  letter-spacing: 0.08em;
  color: var(--blue);
}
.man-title {
  font: 700 18px/1.3 'Space Grotesk', sans-serif;
}

/* faq: the online-deposit question belongs to the tier with payments */
.faq:nth-of-type(4) {
  display: none;
}
.faq {
  border-bottom: 1px solid var(--line);
  background: var(--white);
  margin-bottom: -1px;
  border-inline: 1px solid var(--line);
}
.faqs {
  border-top: 2px solid var(--navy);
}
.faq summary {
  position: relative;
  padding: 16px 40px 16px 14px;
  font: 700 17px/1.4 'Space Grotesk', sans-serif;
  list-style: none;
  cursor: pointer;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: '+';
  position: absolute;
  right: 14px;
  top: 12px;
  font: 700 22px/1 'Space Grotesk', sans-serif;
  color: var(--blue);
}
.faq[open] summary::after {
  content: '−';
}
.faq p {
  margin: 0;
  padding: 0 14px 16px;
  color: var(--mute);
}

/* visit */
.visit {
  display: grid;
  gap: 18px;
  padding-bottom: 56px;
}
.visit-box {
  padding: 20px;
  background: var(--white);
  border: 1.5px solid var(--navy);
}
.addr {
  display: flex;
  gap: 8px;
  font-weight: 600;
}
.addr .k-icon {
  flex: none;
  margin-top: 4px;
  color: var(--red);
}
.hours li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
}
.map {
  min-height: 280px;
  border: 1.5px solid var(--navy);
}

/* footer */
.ftr {
  padding: 36px 0 22px;
  background: var(--navy);
  color: #b6c6dc;
}
.ftr-grid {
  display: grid;
  gap: 18px;
}
.ftr-brand {
  margin-bottom: 8px;
  font: 700 24px/1 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  color: #fff;
}
.ftr-h {
  font: 700 13px/1.3 'Space Grotesk', sans-serif;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #ffd166;
}

/* phone dock */
.dock {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  height: 68px;
  padding: 10px 12px;
  background: var(--white);
  border-top: 2px solid var(--navy);
}
.dock-call,
.dock-book {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 2px solid var(--navy);
  font: 700 15px/1 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
}
.dock-call {
  background: transparent;
  color: var(--navy);
}
.dock-book {
  background: var(--navy);
  color: #fff;
}

/* inner pages */
.page {
  padding: 28px 0 56px;
}
.finder {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}
.find {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 14px;
  border: 2px solid var(--navy);
  background: var(--white);
  color: var(--blue);
}
.find input {
  flex: 1;
  min-width: 0;
  min-height: 50px;
  border: 0;
  background: transparent;
  font: inherit;
  color: var(--ink);
  outline: none;
}
.sel {
  min-width: 0;
  min-height: 48px;
  padding: 0 10px;
  border: 2px solid var(--navy);
  border-radius: 0;
  background: var(--white);
  font: inherit;
  font-size: 15px;
}
.tabs {
  display: flex;
  margin: 0 -16px 20px;
  padding: 0 16px;
  overflow-x: auto;
  border-bottom: 2px solid var(--navy);
}
.tabs-list {
  display: contents;
}
.tab {
  flex: none;
  min-height: 46px;
  padding: 0 16px;
  border: 0;
  border-bottom: 4px solid transparent;
  background: none;
  font: 700 14px/1 'Space Grotesk', sans-serif;
  text-transform: uppercase;
  cursor: pointer;
}
.tab[aria-pressed='true'] {
  border-bottom-color: var(--red);
  color: var(--navy);
  background: var(--white);
}
.empty {
  grid-column: 1 / -1;
  padding: 32px 0;
  color: var(--mute);
}

/* detail */
.pd {
  display: grid;
  gap: 24px;
}
.pd-price {
  font: 700 32px/1.1 'Space Grotesk', sans-serif;
  color: var(--blue);
}
.pd-price small {
  font: 400 15px/1 'Be Vietnam Pro', sans-serif;
  color: var(--mute);
}
.pd-opts {
  margin-bottom: 14px;
}
.pd-attrs {
  margin: 18px 0;
  border-top: 2px solid var(--navy);
  background: var(--white);
}
.pd-attrs div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
}
.pd-attrs dt {
  color: var(--mute);
}
.pd-attrs dd {
  margin: 0;
  font-weight: 700;
  text-align: right;
}

/* booking */
.bk {
  display: grid;
  gap: 18px;
}
.bk-form {
  padding: 20px;
  background: var(--white);
  border: 2px solid var(--navy);
}
.bk-side {
  padding: 4px 0;
}
.bk-rows {
  margin: 0 0 16px;
  background: var(--navy);
  color: #b6c6dc;
}
.bk-rows div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}
.bk-rows dd {
  margin: 0;
  font: 700 19px/1.3 'Space Grotesk', sans-serif;
  color: #fff;
  text-align: right;
}
.bk-item:empty::before {
  content: 'Chọn trong form';
  font-weight: 400;
  color: #b6c6dc;
}

/* article */
.art {
  max-width: 760px;
}
.art-fig {
  margin: 8px 0 24px;
}
.art-body p {
  font-size: 18px;
  line-height: 1.75;
  margin-bottom: 18px;
}
.art-more {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 2px solid var(--navy);
}
.art-more li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font: 700 18px/1.4 'Space Grotesk', sans-serif;
}
.art-more a {
  text-decoration: none;
}

@media (max-width: 719px) {
  .fb-item:nth-of-type(n + 3) {
    display: none;
  }
  .works img:nth-of-type(n + 3) {
    display: none;
  }
  .specs:not(.specs-all) .spec {
    grid-template-columns: 112px 1fr;
  }
  .specs:not(.specs-all) .spec-img img {
    height: 100%;
    aspect-ratio: auto;
    min-height: 120px;
  }
  .specs:not(.specs-all) .spec-short {
    display: none;
  }
  .specs:not(.specs-all) .spec-body {
    padding: 12px;
  }
  .specs:not(.specs-all) .spec-name {
    font-size: 17px;
  }
}

@media (min-width: 720px) {
  body {
    padding-bottom: 0;
  }
  .dock {
    display: none;
  }
  .tr {
    grid-template-columns: 1.3fr 1fr 1fr;
    align-items: center;
    gap: 16px;
  }
  .tr.th {
    display: grid;
    background: var(--navy);
    color: #fff;
    font: 700 13px/1.3 'Space Grotesk', sans-serif;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }
  .specs {
    grid-template-columns: repeat(3, 1fr);
  }
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .stats div {
    border-top: 0;
    border-right: 1px solid var(--line);
  }
  .stats div:last-of-type {
    border-right: 0;
  }
  .flow {
    grid-template-columns: repeat(4, 1fr);
  }
  .flow li {
    flex-direction: column;
    align-items: flex-start;
  }
  .flow-sm {
    grid-template-columns: 1fr;
  }
  .flow-sm li {
    flex-direction: row;
    align-items: center;
  }
  .works {
    grid-template-columns: repeat(4, 1fr);
  }
  .fb {
    grid-template-columns: repeat(3, 1fr);
  }
  .manual:not(.manual-all) {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    column-gap: 32px;
  }
  .manual-all {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    border-top: 0;
  }
  .man-big {
    grid-template-columns: 1fr;
    padding: 0;
    border: 0;
    gap: 6px;
  }
  .man-big img {
    grid-row: auto;
    width: 100%;
    height: auto;
    aspect-ratio: 3 / 2;
  }
  .finder {
    grid-template-columns: 1fr 220px 220px;
  }
  .find {
    grid-column: auto;
  }
  .ftr-grid {
    grid-template-columns: 1.2fr 1fr 1.2fr;
  }
}

@media (min-width: 1024px) {
  .hdr-in {
    padding: 14px 0;
  }
  .hdr-menu {
    display: none;
  }
  .menu {
    display: flex;
    position: static;
    flex-direction: row;
    gap: 28px;
    padding: 0;
    border: 0;
    background: none;
  }
  .menu a {
    padding: 0;
    border: 0;
    font-size: 16px;
  }
  .hero {
    grid-template-columns: 1.2fr 1fr;
    align-items: center;
    gap: 56px;
    padding: 56px 0 8px;
  }
  .visit {
    grid-template-columns: 1fr 1.4fr;
    gap: 28px;
  }
  .pd {
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: start;
  }
  .bk {
    grid-template-columns: 1.4fr 1fr;
    gap: 28px;
    align-items: start;
  }
  .specs-all {
    grid-template-columns: repeat(3, 1fr);
  }
}