/* ---------- Design tokens ---------- */
:root {
  /* Neutral palette with teal accents */
  --c-bg: #FFFFFF;
  --c-paper: #FFFFFF;
  --c-mist: #F4F5F6;    /* warm neutral gray for section bands */
  --c-haze: #C7D7D9;
  --c-aqua: #5CB8B2;
  --c-deep: #1D5C63;
  --c-ink: #0F2A2E;
  --c-muted: #6B7C7F;
  --c-line: rgba(15, 42, 46, 0.10);
  --c-accent: #FFB347;

  /* Type */
  --f-sans: "Inter", "Helvetica Neue", Helvetica, Arial, "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --f-serif: "GT Sectra", "Source Serif Pro", "Noto Serif TC", "Songti TC", "PingFang TC", serif;
  --f-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Rhythm */
  --r-sm: 6px;
  --r-md: 14px;
  --r-lg: 24px;
  --r-xl: 36px;

  /* Easing */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--f-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ---------- Variant: Conservative ---------- */
body[data-variant="conservative"] {
  --c-bg: #FAFAFB;
  --c-paper: #FFFFFF;
  --c-mist: #F0F1F3;
  --c-haze: #C2D0D2;
  --c-aqua: #4A8B92;
  --c-deep: #1A4A52;
  --c-ink: #0E2A2E;
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
  --r-xl: 22px;
}

/* ---------- Variant: Balanced (default) ---------- */
body[data-variant="balanced"] {
  --c-bg: #FFFFFF;
  --c-paper: #FFFFFF;
  --c-mist: #F4F5F6;
  --c-haze: #C7D7D9;
  --c-aqua: #5CB8B2;
  --c-deep: #1D5C63;
  --c-ink: #0F2A2E;
}

/* ---------- Variant: Bold ---------- */
body[data-variant="bold"] {
  --c-bg: #051E22;
  --c-paper: #0B2F33;
  --c-mist: #133D42;
  --c-haze: #5CB8B2;
  --c-aqua: #7FE3DC;
  --c-deep: #BFF6F0;
  --c-ink: #EAFAFA;
  --c-muted: #7BA7AB;
  --c-line: rgba(127, 227, 220, 0.22);
  --r-sm: 8px;
  --r-md: 18px;
  --r-lg: 32px;
  --r-xl: 48px;
}

/* ---------- Typography utilities ---------- */
.eyebrow {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-aqua);
}
.h-display {
  font-family: var(--f-serif);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.02;
  margin: 0;
}
.h-section {
  font-family: var(--f-serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1.1;
  margin: 0;
}
body[data-variant="bold"] .h-display,
body[data-variant="bold"] .h-section {
  font-family: var(--f-sans);
  font-weight: 200;
  letter-spacing: -0.04em;
}

/* ---------- Layout ---------- */
.shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 56px;
}
@media (max-width: 1100px) { .shell { padding: 0 32px; } }
@media (max-width: 760px)  { .shell { padding: 0 18px !important; } }

/* ---------- Mobile responsive overrides ---------- */
@media (max-width: 760px) {
  /* Stack every inline grid-template-columns to single column */
  div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
    gap: 16px !important;
  }
  /* Allow image-grid pairs (solution images, awards) to remain 2 cols */
  .qs-keep-2col[style*="grid-template-columns"] {
    grid-template-columns: 1fr 1fr !important;
  }
  /* Reduce vertical padding on stacked sections */
  section { padding-top: 56px !important; padding-bottom: 56px !important; }
  /* Nav: hide desktop links, show hamburger */
  .qs-nav-desktop { display: none !important; }
  .qs-nav-hamburger { display: inline-flex !important; }
  /* Nav padding tighter */
  .qs-nav .shell { padding: 12px 18px !important; }
  /* Hero font shrink */
  .h-display { font-size: clamp(34px, 9.5vw, 56px) !important; }
  .h-section { font-size: clamp(22px, 6vw, 32px) !important; }
  /* Sticky elements stop being sticky on mobile (avoid overlap) */
  [style*="position: sticky"] { position: static !important; }
  /* Footer: stack contact ctas */
  footer .shell > div { gap: 32px !important; }
  /* Card padding tighter on mobile */
  .card { border-radius: var(--r-md); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: all 0.3s var(--ease-out);
  white-space: nowrap;
}
.btn-primary {
  background: var(--c-deep);
  color: var(--c-paper);
}
.btn-primary:hover {
  background: var(--c-ink);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-line);
}
.btn-ghost:hover {
  border-color: var(--c-deep);
  background: var(--c-mist);
}
body[data-variant="bold"] .btn-primary {
  background: var(--c-deep);
  color: var(--c-paper);
}

/* ---------- Cards ---------- */
.card {
  background: var(--c-paper);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  transition: all 0.3s var(--ease-out);
}
.card:hover {
  border-color: var(--c-aqua);
  transform: translateY(-2px);
}

/* ---------- Placeholder image ---------- */
.ph {
  position: relative;
  background:
    repeating-linear-gradient(
      135deg,
      var(--c-mist) 0px,
      var(--c-mist) 8px,
      transparent 8px,
      transparent 16px
    ),
    var(--c-haze);
  border-radius: var(--r-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-deep);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px dashed var(--c-deep);
  border-radius: calc(var(--r-md) - 4px);
  opacity: 0.35;
}
.ph > span { position: relative; z-index: 1; padding: 4px 10px; background: var(--c-paper); border-radius: 999px; }

/* ---------- Misc ---------- */
.divider {
  height: 1px;
  background: var(--c-line);
  border: 0;
  margin: 0;
}

.kbd {
  font-family: var(--f-mono);
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--c-line);
  background: var(--c-mist);
}

/* page transitions */
.page-enter {
  animation: pageEnter 0.55s var(--ease-out) both;
}
@keyframes pageEnter {
  0% { opacity: 0; transform: translateY(14px); filter: blur(6px); }
  100% { opacity: 1; transform: translateY(0); filter: blur(0); }
}

/* scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--c-haze); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-aqua); }
::-webkit-scrollbar-track { background: transparent; }