/* ==========================================================================
   DSH LIMITED — cold aisle data hall
   Palette: COLD-AISLE #060A10 body / STATUS #D4E4DA text / PWR-LED #3C6661
   RACK-DEEP #161E22 wells / BAY-PANEL #28322C panels / LOOM-COPPER #8E5E3F
   PATCH-BLUE #42466C patch chips only
   ========================================================================== */

:root {
  --cold: #060A10;
  --status: #D4E4DA;
  --power: #3C6661;
  --deep: #161E22;
  --bay: #28322C;
  --loom: #8E5E3F;
  --patch: #42466C;
  --hair: #1F2C33;
  --muted: #A9BDB4;
  --dark-ink: #0B1014;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-size: 16px;
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background-color: #060A10;
  color: #D4E4DA;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: #8FB8AE;
  text-decoration: none;
}

a:hover {
  color: #D4E4DA;
  text-decoration: underline;
}

p {
  margin: 0 0 1.05em;
}

h1, h2, h3, h4 {
  font-family: "Trebuchet MS", "Segoe UI", Arial, sans-serif;
  color: #D4E4DA;
  line-height: 1.18;
  margin: 0 0 0.5em;
  letter-spacing: 0.01em;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- top rail navigation ---------- */

.aislerail {
  background-color: #161E22;
  border-bottom: 2px solid #3C6661;
  position: sticky;
  top: 0;
  z-index: 60;
}

.aislerail-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 62px;
}

.aislerail-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 0.82rem;
  color: #D4E4DA;
  padding: 8px 12px;
  border: 1px solid #3C6661;
  background-color: #1B2624;
  white-space: nowrap;
}

.aislerail-badge .led {
  width: 9px;
  height: 9px;
  background-color: #3C6661;
  border: 1px solid #9FD4C4;
  display: inline-block;
}

.aislerail-tabs {
  display: flex;
  align-items: stretch;
  gap: 4px;
  margin-left: auto;
  flex-wrap: wrap;
}

.aislerail-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #D4E4DA;
  background-color: #28322C;
  border: 1px solid #3C6661;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 9px 14px;
  transition: background-color 160ms linear, color 160ms linear;
}

.aislerail-tab:hover,
.aislerail-tab.is-current {
  background-color: #3C6661;
  color: #08100D;
  text-decoration: none;
  font-weight: 700;
}

.aislerail-tab:nth-child(1) { width: 96px; }
.aislerail-tab:nth-child(2) { width: 126px; }
.aislerail-tab:nth-child(3) { width: 112px; }
.aislerail-tab:nth-child(4) { width: 104px; }
.aislerail-tab:nth-child(5) { width: 132px; }

.aislerail-toggle {
  display: none;
  margin-left: auto;
  background-color: #28322C;
  color: #D4E4DA;
  border: 1px solid #3C6661;
  padding: 9px 14px;
  font-size: 0.84rem;
  letter-spacing: 0.1em;
  cursor: pointer;
}

/* ---------- shared layout ---------- */

.flooredge {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- rack row hero ---------- */

.rackrow {
  padding: 58px 0 0;
  border-bottom: 1px solid #1F2C33;
}

.rackrow-head {
  max-width: 900px;
}

.rackrow-kicker {
  display: inline-block;
  font-size: 0.76rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: #8E5E3F;
  border-left: 3px solid #8E5E3F;
  padding-left: 10px;
  margin-bottom: 18px;
}

.rackrow-title {
  font-size: clamp(2.2rem, 5.4vw, 3.9rem);
  font-weight: 700;
  line-height: 1.04;
  margin: 0 0 18px;
  color: #D4E4DA;
}

.rackrow-title .lever {
  display: block;
  color: #3C6661;
  font-size: clamp(3.4rem, 9vw, 6.6rem);
  letter-spacing: 0.06em;
  line-height: 0.92;
  margin-top: 6px;
}

.rackrow-lede {
  font-size: 1.06rem;
  color: #C6D8CF;
  max-width: 760px;
}

.rackrow-link {
  display: inline-block;
  margin-top: 4px;
  color: #9FD4C4;
  font-weight: 700;
  letter-spacing: 0.02em;
  border-bottom: 2px solid #3C6661;
  padding-bottom: 2px;
}

.rackrow-link:hover {
  color: #D4E4DA;
  border-bottom-color: #8E5E3F;
}

.rackrow-hall {
  margin-top: 34px;
  background-color: #161E22;
  border: 1px solid #2C3A35;
  border-bottom: 0;
  padding: 0;
}

.rackrow-band {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr 1.35fr;
  gap: 0;
  min-height: 250px;
}

/* rack row device at left */
.rackrow-racks {
  padding: 20px 18px;
  border-right: 1px solid #2C3A35;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
  position: relative;
}

.rackrow-unit {
  background-color: #28322C;
  border: 1px solid #3A4A43;
  border-left: 4px solid #3C6661;
  padding: 7px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: #C6D8CF;
}

.rackrow-unit:nth-child(2) { margin-left: 16px; }
.rackrow-unit:nth-child(3) { margin-left: 34px; }
.rackrow-unit:nth-child(4) { margin-left: 8px; }
.rackrow-unit:nth-child(5) { margin-left: 26px; }
.rackrow-unit:nth-child(6) { margin-left: 2px; }

.rackrow-unit .lamp {
  width: 8px;
  height: 8px;
  background-color: #3C6661;
  display: inline-block;
  flex: 0 0 8px;
}

.rackrow-tag {
  display: inline-block;
  background-color: #42466C;
  color: #E6E9F6;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  padding: 1px 6px;
  margin-left: auto;
  text-transform: uppercase;
}

/* lamp bar at centre */
.rackrow-lamps {
  padding: 22px 16px;
  border-right: 1px solid #2C3A35;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  background-color: #131B1E;
}

.rackrow-lampbar {
  width: 100%;
  max-width: 150px;
  height: 10px;
  background-color: #3C6661;
  border-top: 1px solid #7FB3A5;
  border-bottom: 3px solid #26362F;
  box-shadow: 0 0 22px #23403A;
}

.rackrow-hanger {
  width: 2px;
  height: 74px;
  background-color: #3A4A43;
}

.rackrow-hanger.side {
  height: 48px;
}

.rackrow-label {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #8E9E96;
}

/* patch loom rail at right */
.rackrow-loom {
  padding: 20px 18px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.rackrow-rail {
  height: 8px;
  background-color: #28322C;
  border: 1px solid #3A4A43;
  position: relative;
}

.rackrow-rail::before,
.rackrow-rail::after {
  content: "";
  position: absolute;
  top: -5px;
  width: 4px;
  height: 16px;
  background-color: #8E5E3F;
}

.rackrow-rail::before { left: 12%; }
.rackrow-rail::after { right: 18%; }

.rackrow-cord {
  height: 3px;
  background-color: #2F3F47;
  margin: 0 0 0 22%;
}

.rackrow-cord.short {
  margin-left: 46%;
  background-color: #3C6661;
}

.rackrow-chipset {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.rackrow-chip {
  background-color: #42466C;
  color: #E6E9F6;
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  padding: 3px 7px;
  text-transform: uppercase;
}

.rackrow-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background-color: #3C6661;
  color: #08100D;
  padding: 18px 24px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.95rem;
  border-top: 1px solid #6FA294;
}

.rackrow-cta:hover {
  background-color: #4E7C75;
  color: #060A10;
  text-decoration: none;
}

.rackrow-cta .arrow {
  font-size: 1.35rem;
  line-height: 1;
}

/* ---------- generic section furniture ---------- */

.section {
  padding: 66px 0;
  border-bottom: 1px solid #1F2C33;
}

.section-well {
  background-color: #0A1115;
}

.section-deep {
  background-color: #101619;
}

.section-head {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-eyebrow {
  font-size: 0.74rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: #8E5E3F;
  margin-bottom: 10px;
  display: block;
}

.section-title {
  font-size: clamp(1.6rem, 3.1vw, 2.35rem);
  margin-bottom: 14px;
}

.section-intro {
  color: #C6D8CF;
}

/* ---------- hands-on rows ---------- */

.handsonrow {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.handsonrow-item {
  background-color: #28322C;
  border: 1px solid #384740;
  border-left: 5px solid #3C6661;
  padding: 22px 24px;
  position: relative;
  transition: border-left-color 180ms linear, background-color 180ms linear;
}

.handsonrow-item:hover {
  background-color: #2C3831;
  border-left-color: #8E5E3F;
}

.handsonrow-item:nth-child(1) { width: 92%; }
.handsonrow-item:nth-child(2) { width: 86%; margin-left: 9%; }
.handsonrow-item:nth-child(3) { width: 74%; margin-left: 3%; }
.handsonrow-item:nth-child(4) { width: 88%; margin-left: 12%; }
.handsonrow-item:nth-child(5) { width: 80%; margin-left: 1%; }
.handsonrow-item:nth-child(6) { width: 90%; margin-left: 7%; }

.handsonrow-mark {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: #B9C2E6;
  background-color: #42466C;
  padding: 2px 8px;
  margin-bottom: 10px;
}

.handsonrow-name {
  font-size: 1.28rem;
  margin: 0 0 8px;
}

.handsonrow-text {
  margin: 0;
  color: #C6D8CF;
  max-width: 640px;
}

.handsonrow-tag {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #A9BDB4;
  border: 1px solid #3C6661;
  padding: 2px 8px;
}

.handsonrow-item:nth-child(2) .handsonrow-tag,
.handsonrow-item:nth-child(5) .handsonrow-tag {
  transform: rotate(-2deg);
  border-color: #8E5E3F;
}

/* ---------- prose blocks ---------- */

.prose-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 42px;
}

.prose-grid .prose-block h3 {
  font-size: 1.3rem;
  margin-top: 0;
}

.prose-block p {
  color: #C6D8CF;
}

.pull-quote-line {
  border-left: 4px solid #8E5E3F;
  padding: 6px 0 6px 20px;
  margin: 26px 0;
  font-size: 1.12rem;
  color: #D4E4DA;
  font-style: italic;
}

/* ---------- spec ledger ---------- */

.spec-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid #2C3A35;
}

.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 13px 4px;
  border-bottom: 1px solid #2C3A35;
  color: #C6D8CF;
}

.spec-list li span:last-child {
  color: #D4E4DA;
  font-weight: 700;
  text-align: right;
}

/* ---------- lamp bar band ---------- */

.lampbar {
  background-color: #161E22;
  border-top: 1px solid #2C3A35;
  border-bottom: 1px solid #2C3A35;
}

.lampbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.lampbar-edge {
  flex: 0 0 120px;
  height: 12px;
  background-color: #3C6661;
  border-top: 1px solid #7FB3A5;
  box-shadow: 0 0 18px #23403A;
}

.lampbar-text {
  margin: 0;
  color: #C6D8CF;
  font-size: 0.98rem;
}

.lampbar-text strong {
  color: #D4E4DA;
}

/* ---------- process rail ---------- */

.process-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid #2C3A35;
  background-color: #161E22;
}

.process-step {
  padding: 24px 20px;
  border-right: 1px solid #2C3A35;
}

.process-step:last-child {
  border-right: 0;
}

.process-step .step-index {
  color: #8E5E3F;
  font-size: 0.74rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 8px;
}

.process-step h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.process-step p {
  margin: 0;
  color: #C6D8CF;
  font-size: 0.94rem;
}

/* ---------- callout ---------- */

.callout {
  background-color: #28322C;
  border: 1px solid #3C6661;
  padding: 30px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
}

.callout h3 {
  margin: 0 0 6px;
  font-size: 1.4rem;
}

.callout p {
  margin: 0;
  color: #C6D8CF;
  max-width: 620px;
}

.callout-link {
  background-color: #3C6661;
  color: #08100D;
  padding: 13px 24px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.86rem;
  white-space: nowrap;
}

.callout-link:hover {
  background-color: #4E7C75;
  color: #060A10;
  text-decoration: none;
}

/* ---------- contact page ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 44px;
}

.contact-form {
  background-color: #28322C;
  border: 1px solid #3B4A43;
  padding: 30px;
}

.field {
  margin-bottom: 18px;
}

.field label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #A9BDB4;
  margin-bottom: 6px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background-color: #10171A;
  border: 1px solid #3C6661;
  color: #D4E4DA;
  padding: 11px 12px;
  font-size: 0.96rem;
  font-family: inherit;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: 2px solid #8E5E3F;
  outline-offset: 1px;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.form-submit {
  background-color: #3C6661;
  color: #08100D;
  border: 0;
  padding: 14px 30px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-size: 0.9rem;
  cursor: pointer;
}

.form-submit:hover {
  background-color: #4E7C75;
}

.contact-aside {
  border-left: 1px solid #2C3A35;
  padding-left: 34px;
}

.contact-aside h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.contact-aside dt {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #8E5E3F;
  margin-top: 18px;
}

.contact-aside dd {
  margin: 4px 0 0;
  color: #D4E4DA;
}

.contact-aside a {
  color: #9FD4C4;
}

.form-status {
  margin-top: 14px;
  font-size: 0.9rem;
  color: #C6D8CF;
}

/* ---------- faq ---------- */

.faq-item {
  background-color: #28322C;
  border-left: 4px solid #3C6661;
  margin-bottom: 12px;
}

.faq-q {
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  color: #D4E4DA;
  font-size: 1rem;
  font-weight: 700;
  padding: 18px 22px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  font-family: inherit;
}

.faq-q .sign {
  color: #3C6661;
  font-size: 1.25rem;
  line-height: 1;
}

.faq-a {
  padding: 0 22px 18px;
  color: #C6D8CF;
  margin: 0;
}

/* ---------- intake footer ---------- */

.intakegrate {
  background-color: #161E22;
  border-top: 2px solid #3C6661;
  position: relative;
}

.intakegrate-room {
  max-width: 1180px;
  margin: 0 auto;
  padding: 46px 24px 30px;
  position: relative;
}

.intakegrate-grate {
  position: absolute;
  right: 24px;
  bottom: 18px;
  width: 190px;
  height: 54px;
  background-color: #101619;
  border: 1px solid #2C3A35;
  background-image: repeating-linear-gradient(90deg, #28322C 0 4px, #101619 4px 12px);
}

.intakegrate-trolley {
  position: absolute;
  left: 24px;
  bottom: 16px;
  width: 74px;
  height: 46px;
  border: 2px solid #3C6661;
  border-right: 0;
  background-color: #101619;
}

.intakegrate-trolley::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 10px;
  width: 8px;
  height: 22px;
  border: 2px solid #8E5E3F;
  border-left: 0;
}

.intakegrate-board {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.intakegrate-brand {
  margin: 0 0 10px;
  font-size: 1.2rem;
  letter-spacing: 0.18em;
}

.intakegrate-blurb {
  color: #A9BDB4;
  max-width: 420px;
  margin: 0;
}

.intakegrate-cols {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.intakegrate-colhead {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: #8E5E3F;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.intakegrate-colhead::before {
  content: "";
  width: 10px;
  height: 4px;
  background-color: #3C6661;
  display: inline-block;
}

.intakegrate-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.intakegrate-links li {
  margin-bottom: 7px;
}

.intakegrate-links a {
  color: #C6D8CF;
  font-size: 0.94rem;
}

.intakegrate-links a:hover {
  color: #D4E4DA;
  text-decoration: underline;
}

.intakegrate-strip {
  max-width: 1180px;
  margin: 0 auto;
  padding: 16px 24px 22px;
  border-top: 1px solid #2C3A35;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  color: #A9BDB4;
  font-size: 0.84rem;
}

.intakegrate-strip a {
  color: #9FD4C4;
}

.intakegrate-strip .rack-glyph {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 1px solid #3C6661;
  background-color: #101619;
  margin-right: 7px;
  vertical-align: -1px;
}

.intakegrate-strip .copy {
  margin-left: auto;
}

/* ---------- reveal animation ---------- */

.reveal {
  transform: translateY(18px);
  transition: transform 520ms ease;
}

.reveal.is-shown {
  transform: none;
}

/* ---------- responsive ---------- */

@media (max-width: 980px) {
  .rackrow-band {
    grid-template-columns: 1fr;
  }

  .rackrow-racks,
  .rackrow-lamps {
    border-right: 0;
    border-bottom: 1px solid #2C3A35;
  }

  .prose-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .contact-aside {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid #2C3A35;
    padding-top: 26px;
  }

  .process-rail {
    grid-template-columns: 1fr 1fr;
  }

  .process-step:nth-child(2) {
    border-right: 0;
  }

  .process-step:nth-child(1),
  .process-step:nth-child(2) {
    border-bottom: 1px solid #2C3A35;
  }

  .handsonrow-item,
  .handsonrow-item:nth-child(n) {
    width: 100%;
    margin-left: 0;
  }

  .intakegrate-board {
    grid-template-columns: 1fr;
  }

  .intakegrate-grate,
  .intakegrate-trolley {
    display: none;
  }
}

@media (max-width: 760px) {
  .aislerail-toggle {
    display: inline-block;
  }

  .aislerail-tabs {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 6px;
    padding: 0 0 14px;
    margin-left: 0;
  }

  .aislerail-tabs.is-open {
    display: flex;
  }

  .aislerail-inner {
    flex-wrap: wrap;
    padding-top: 12px;
    padding-bottom: 0;
  }

  .aislerail-tab,
  .aislerail-tab:nth-child(n) {
    width: 100%;
  }

  .rackrow {
    padding-top: 38px;
  }

  .section {
    padding: 48px 0;
  }

  .callout {
    flex-direction: column;
    align-items: flex-start;
  }

  .intakegrate-strip .copy {
    margin-left: 0;
  }
}