/* ============================================================
   QUANTUMLEAP STORAGE — Modern Dark Tech Theme
   Accent: Cool Blue (OKLCH, Restrained)
   Typography: Inter (Sans), JetBrains Mono (Mono)
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap");

:root {
  /* ground */
  --bg-deep:       oklch(0.12 0.015 250);  /* Deep tech dark blue-gray */
  --bg-surface:    oklch(0.16 0.020 250);  /* Slightly lighter surface */
  --bg-card:       oklch(0.20 0.022 250);  /* Card background */
  
  /* ink */
  --ink:           oklch(0.95 0.008 250);  /* Soft white text */
  --ink-soft:      oklch(0.80 0.015 250);  /* Subtitle / body text */
  --ink-mute:      oklch(0.55 0.015 250);  /* Muted metadata */
  --ink-faint:     oklch(0.35 0.015 250);  /* Dark placeholders */

  /* borders & lines */
  --border:        oklch(0.25 0.020 250);  /* Subtle borders */
  --border-strong: oklch(0.35 0.025 250);  /* Clear separations */

  /* accent - cool blue */
  --accent:        oklch(0.68 0.16 230);   /* Electric cool blue */
  --accent-deep:   oklch(0.58 0.16 230);   /* Darker cool blue for hover */
  --accent-glow:   oklch(0.68 0.16 230 / 0.15); /* Translucent glow */
  --accent-faint:  oklch(0.68 0.16 230 / 0.05);

  /* type */
  --sans:   "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono:   "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  /* layout rhythm */
  --gut:    clamp(1.25rem, 3vw, 2.5rem);
  --col:    1200px;
}

* { box-sizing: border-box; }

html { 
  -webkit-font-smoothing: antialiased; 
  -moz-osx-font-smoothing: grayscale; 
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--bg-deep);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s ease, background 0.2s ease; }
button, input, textarea, select { font: inherit; color: inherit; background: none; border: none; }

/* ---------- layout ---------- */
.container {
  width: min(var(--col), 100% - var(--gut) * 2);
  margin-inline: auto;
}

.section { padding-block: clamp(4rem, 8vw, 7rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }

.hr-line { height: 1px; background: var(--border); border: 0; margin: 0; }

/* ---------- typography ---------- */
h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.02em; margin: 0; color: var(--ink); }
h1 { font-size: clamp(2.5rem, 5vw, 4.5rem); line-height: 1.1; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.75rem); line-height: 1.2; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); line-height: 1.3; }

h1 span, h2 span, h3 span { color: var(--accent); }

p { margin: 0; color: var(--ink-soft); }
.lede { font-size: clamp(1.125rem, 1.3vw, 1.25rem); line-height: 1.6; color: var(--ink-soft); max-width: 65ch; }

.eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: "";
  width: 12px; height: 1px; background: var(--accent);
}

.label-mono {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.75rem;
  border-radius: 4px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: center;
}

.btn-primary {
  background-color: var(--accent);
  color: oklch(0.05 0 0); /* dark ink on bright button */
  font-weight: 600;
}
.btn-primary:hover {
  background-color: var(--accent-deep);
  transform: translateY(-1px);
}

.btn-ghost {
  border: 1px solid var(--border-strong);
  color: var(--ink);
}
.btn-ghost:hover {
  border-color: var(--accent);
  background-color: var(--accent-faint);
  transform: translateY(-1px);
}

.btn .arr {
  margin-left: 0.5rem;
  transition: transform 0.2s ease;
}
.btn:hover .arr {
  transform: translateX(3px);
}

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgb(18 24 38 / 0.85); /* fallback for rgba */
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.brand {
  display: flex;
  flex-direction: column;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
}
.brand-name span {
  color: var(--accent);
}
.brand-sub {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  color: var(--ink-mute);
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  position: relative;
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--accent);
}
.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  bottom: -6px; left: 0; right: 0;
  height: 2px;
  background-color: var(--accent);
  border-radius: 2px;
}

.nav-cta {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.45rem 1rem;
  border-radius: 4px;
  transition: all 0.2s ease;
}
.nav-cta:hover {
  background-color: var(--accent-faint);
  box-shadow: 0 0 15px var(--accent-glow);
}

.nav-toggle {
  display: none;
  width: 2rem;
  height: 2rem;
  position: relative;
  cursor: pointer;
  z-index: 1002;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background-color: var(--ink);
  transition: transform 0.25s ease, top 0.25s ease, background-color 0.25s ease;
}
.nav-toggle span { top: calc(50% - 1px); }
.nav-toggle span::before { top: -8px; }
.nav-toggle span::after { top: 8px; }

/* ---------- hero / page header ---------- */
.hero {
  padding-block: clamp(5rem, 10vw, 8.5rem);
  background: radial-gradient(circle at 80% 20%, var(--accent-glow) 0%, transparent 60%);
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  max-width: 700px;
}

.hero-title {
  margin-bottom: 1.5rem;
}

.hero-lede {
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 3rem;
  box-shadow: 0 20px 40px rgb(0 0 0 / 0.3), inset 0 0 30px rgb(255 255 255 / 0.02);
}
.hero-visual img {
  width: 90%;
  height: auto;
  object-fit: contain;
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.5));
}
.hero-visual .badge {
  position: absolute;
  top: 1rem; right: 1rem;
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--accent);
  background-color: var(--accent-faint);
  border: 1px solid var(--accent);
  padding: 0.25rem 0.6rem;
  border-radius: 100px;
  text-transform: uppercase;
}

.page-hero {
  padding-block: clamp(4rem, 6vw, 6rem);
  border-bottom: 1px solid var(--border);
  background: radial-gradient(circle at 10% 10%, var(--accent-glow) 0%, transparent 40%);
}
.crumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-mute);
  margin-bottom: 1.5rem;
}
.crumb a:hover { color: var(--accent); }
.crumb .sep { color: var(--border-strong); }

.page-title {
  margin-bottom: 1rem;
}

/* ---------- card grids ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2.5rem;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 15px 30px rgb(0 0 0 / 0.25), 0 0 20px var(--accent-glow);
}
.card-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 8px;
  background-color: var(--accent-faint);
  border: 1px solid var(--accent-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.75rem;
  color: var(--accent);
}
.card h3 {
  margin-bottom: 1rem;
}

.s-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
  align-items: flex-end;
}
.s-head p {
  font-size: 1.1rem;
  line-height: 1.6;
}

/* ---------- metrics ---------- */
.metrics-section {
  background-color: var(--bg-surface);
  border-block: 1px solid var(--border);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  divide-x: 1px solid var(--border);
}
.metric {
  padding-block: 3.5rem;
  text-align: center;
  border-right: 1px solid var(--border);
}
.metric:last-child {
  border-right: none;
}
.metric-num {
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.metric-num sup {
  font-size: 0.6em;
  font-weight: 500;
  top: -0.3em;
}
.metric-lbl {
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-family: var(--mono);
}

/* ---------- product grid ---------- */
.chips-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}
.chips-label {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--ink-mute);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.chip {
  padding: 0.5rem 1.25rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}
.chip:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.chip.is-on {
  background-color: var(--accent);
  color: oklch(0.05 0 0);
  border-color: var(--accent);
  font-weight: 600;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.product-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.product-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent);
  box-shadow: 0 15px 30px rgb(0 0 0 / 0.3), 0 0 20px var(--accent-glow);
}
.product-img {
  width: 100%;
  aspect-ratio: 1.1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  background-color: var(--bg-deep);
  border-radius: 6px;
  border: 1px solid rgb(255 255 255 / 0.02);
  padding: 1.5rem;
}
.product-img img {
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 10px 15px rgba(0,0,0,0.4));
}
.product-tier {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.product-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}
.product-spec {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
}
.product-price {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--ink);
  margin-top: auto;
  border-top: 1px solid var(--border);
  width: 100%;
  padding-top: 1rem;
}

/* ---------- contact section ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
}
.contact-grid--single {
  grid-template-columns: minmax(0, 720px);
  justify-content: center;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}
.info-block h3 {
  font-size: 0.85rem;
  font-family: var(--mono);
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.info-block p {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--ink);
}
.info-block p small {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 0.25rem;
}

.contact-form {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 3rem;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.form-group {
  margin-bottom: 1.5rem;
}
.form-group.last {
  margin-bottom: 2rem;
}
.form-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-mute);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}
.form-input {
  width: 100%;
  background-color: var(--bg-deep);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 0.85rem 1rem;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}
.form-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 10px var(--accent-glow);
}
textarea.form-input {
  min-height: 120px;
  resize: vertical;
}
.form-msg {
  display: none;
  background-color: var(--accent-faint);
  border: 1px solid var(--accent-glow);
  color: var(--accent);
  padding: 1rem;
  border-radius: 4px;
  font-size: 0.9rem;
  margin-top: 1.5rem;
  line-height: 1.5;
}
.form-msg.is-on {
  display: block;
}

/* ---------- section content split ---------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 5rem;
  align-items: center;
}
.about-visual {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3rem;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  aspect-ratio: 1.1;
}
.about-visual img {
  width: 85%;
  filter: drop-shadow(0 20px 30px rgba(0,0,0,0.5));
}
.about-desc h2 {
  margin-bottom: 1.5rem;
}
.about-desc p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

/* ---------- site footer ---------- */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding-block: 4rem 3rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
  gap: 3rem;
  margin-bottom: 4rem;
}
.footer-col h4 {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col li {
  margin-bottom: 0.85rem;
}
.footer-col li a {
  font-size: 0.9rem;
  color: var(--ink-soft);
}
.footer-col li a:hover {
  color: var(--accent);
}
.footer-desc {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ink-mute);
  margin-top: 1rem;
  max-width: 250px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 2rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-mute);
}

/* ---------- responsive media queries ---------- */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
  }
  .hero-actions {
    justify-content: center;
  }
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .s-head {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .metric {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .metric:nth-child(even) {
    border-left: 1px solid var(--border);
  }
  .metric:nth-child(3), .metric:nth-child(4) {
    border-bottom: none;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-split {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 4.5rem; left: 0; right: 0; bottom: 0;
    background-color: var(--bg-deep);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 1001;
    border-top: 1px solid var(--border);
  }
  .nav-cta {
    display: none;
  }
  body.nav-open .nav-cta {
    display: inline-flex;
    position: fixed;
    left: var(--gut);
    right: var(--gut);
    bottom: 2rem;
    justify-content: center;
    z-index: 1002;
    padding-block: 0.85rem;
    background-color: var(--bg-surface);
  }
  .nav-toggle {
    display: block;
  }
  body.nav-open {
    overflow: hidden;
  }
  body.nav-open .nav-links {
    display: flex;
  }
  body.nav-open .nav-toggle span {
    background-color: transparent;
  }
  body.nav-open .nav-toggle span::before {
    transform: rotate(45deg);
    top: 0;
  }
  body.nav-open .nav-toggle span::after {
    transform: rotate(-45deg);
    top: 0;
  }
  
  .card-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
  .metrics-grid {
    grid-template-columns: 1fr;
  }
  .metric:nth-child(even) {
    border-left: none;
  }
  .metric {
    border-bottom: 1px solid var(--border);
  }
  .metric:last-child {
    border-bottom: none;
  }
  .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .card,
  .product-card,
  .about-visual,
  .contact-form {
    padding: 1.5rem;
  }
  .brand-sub {
    letter-spacing: 0.16em;
  }
}

/* ---------- scroll-reveal integration ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}