/* =================================================================
   Horizon Studio × IBM Carbon Design System v11
   Theme: G100 dark (primary) / G10 light (contrast sections)
   Fonts: IBM Plex Sans · Mono · Serif via IBM CDN
   Components: cds-header, cds-side-nav, cds-button, cds-tag,
               cds-loading, cds-inline-notification (web components)
   Icons: Carbon Icons SVG (inline, from @carbon/icons library)
   Grid: Carbon 16-column responsive grid
================================================================= */

/* ── Carbon G100 token definitions ─────────────────────────── */
:root {
  /* Backgrounds */
  --cds-background:               #161616;
  --cds-background-active:        #393939;
  --cds-background-hover:         rgba(141,141,141,0.12);
  --cds-background-selected:      rgba(141,141,141,0.2);

  /* Layers */
  --cds-layer-01:                 #262626;
  --cds-layer-02:                 #393939;
  --cds-layer-03:                 #525252;
  --cds-layer-hover-01:           #333333;
  --cds-layer-hover-02:           #474747;
  --cds-layer-active-01:          #525252;
  --cds-layer-accent-01:          #393939;

  /* Text */
  --cds-text-primary:             #f4f4f4;
  --cds-text-secondary:           #c6c6c6;
  --cds-text-placeholder:         #6f6f6f;
  --cds-text-disabled:            rgba(244,244,244,0.25);
  --cds-text-on-color:            #ffffff;
  --cds-text-on-color-disabled:   rgba(255,255,255,0.25);
  --cds-text-helper:              #8d8d8d;
  --cds-text-error:               #ff8389;
  --cds-text-inverse:             #161616;

  /* Borders */
  --cds-border-subtle-00:         #393939;
  --cds-border-subtle-01:         #393939;
  --cds-border-subtle-02:         #525252;
  --cds-border-subtle-03:         #6f6f6f;
  --cds-border-strong-01:         #6f6f6f;
  --cds-border-strong-02:         #8d8d8d;
  --cds-border-strong-03:         #a8a8a8;
  --cds-border-inverse:           #f4f4f4;
  --cds-border-disabled:          rgba(141,141,141,0.5);

  /* Interactive */
  --cds-interactive:              #4589ff;
  --cds-interactive-hover:        #0f62fe;

  /* Links */
  --cds-link-primary:             #78a9ff;
  --cds-link-primary-hover:       #a6c8ff;
  --cds-link-secondary:           #a6c8ff;
  --cds-link-visited:             #be95ff;
  --cds-link-inverse:             #0f62fe;

  /* Focus */
  --cds-focus:                    #ffffff;
  --cds-focus-inset:              #161616;
  --cds-focus-inverse:            #0f62fe;

  /* Support */
  --cds-support-error:            #ff8389;
  --cds-support-success:          #42be65;
  --cds-support-warning:          #f1c21b;
  --cds-support-info:             #4589ff;
  --cds-support-error-inverse:    #da1e28;
  --cds-support-success-inverse:  #24a148;
  --cds-support-warning-inverse:  #f1c21b;
  --cds-support-info-inverse:     #0043ce;

  /* Overlay */
  --cds-overlay:                  rgba(0,0,0,0.65);

  /* IBM colour palette (selected) */
  --ibm-blue-10:   #edf5ff;
  --ibm-blue-20:   #d0e2ff;
  --ibm-blue-30:   #a6c8ff;
  --ibm-blue-40:   #78a9ff;
  --ibm-blue-50:   #4589ff;
  --ibm-blue-60:   #0f62fe;
  --ibm-blue-70:   #0043ce;
  --ibm-blue-80:   #002d9c;
  --ibm-green-40:  #42be65;
  --ibm-green-50:  #24a148;
  --ibm-purple-40: #be95ff;
  --ibm-red-40:    #ff8389;
  --ibm-yellow-20: #f1c21b;
  --ibm-gray-10:   #f4f4f4;
  --ibm-gray-20:   #e0e0e0;
  --ibm-gray-30:   #c6c6c6;
  --ibm-gray-40:   #a8a8a8;
  --ibm-gray-50:   #8d8d8d;
  --ibm-gray-60:   #6f6f6f;
  --ibm-gray-70:   #525252;
  --ibm-gray-80:   #393939;
  --ibm-gray-90:   #262626;
  --ibm-gray-100:  #161616;

  /* G10 (light) theme tokens used in --g10 sections */
  --cds-g10-background:        #f4f4f4;
  --cds-g10-layer-01:          #ffffff;
  --cds-g10-layer-02:          #f4f4f4;
  --cds-g10-text-primary:      #161616;
  --cds-g10-text-secondary:    #525252;
  --cds-g10-text-helper:       #6f6f6f;
  --cds-g10-border-subtle:     #e0e0e0;
  --cds-g10-border-strong:     #8d8d8d;
  --cds-g10-interactive:       #0f62fe;
  --cds-g10-link:              #0f62fe;
  --cds-g10-hover:             #e8e8e8;

  /* Carbon spacing scale (2px base) */
  --cds-spacing-01:  0.125rem;  /*  2px */
  --cds-spacing-02:  0.25rem;   /*  4px */
  --cds-spacing-03:  0.5rem;    /*  8px */
  --cds-spacing-04:  0.75rem;   /* 12px */
  --cds-spacing-05:  1rem;      /* 16px */
  --cds-spacing-06:  1.5rem;    /* 24px */
  --cds-spacing-07:  2rem;      /* 32px */
  --cds-spacing-08:  2.5rem;    /* 40px */
  --cds-spacing-09:  3rem;      /* 48px */
  --cds-spacing-10:  4rem;      /* 64px */
  --cds-spacing-11:  5rem;      /* 80px */
  --cds-spacing-12:  6rem;      /* 96px */
  --cds-spacing-13: 10rem;      /* 160px */

  /* Carbon type scale */
  --cds-label-01:       0.75rem;
  --cds-label-01-lh:    1.33333;
  --cds-label-01-ls:    0.32px;
  --cds-helper-01:      0.75rem;
  --cds-body-compact-01: 0.875rem;
  --cds-body-compact-01-lh: 1.28572;
  --cds-body-compact-01-ls: 0.16px;
  --cds-body-01:        0.875rem;
  --cds-body-01-lh:     1.42857;
  --cds-body-01-ls:     0.16px;
  --cds-body-02:        1rem;
  --cds-body-02-lh:     1.5;
  --cds-body-02-ls:     0;
  --cds-code-01:        0.75rem;
  --cds-code-02:        0.875rem;
  --cds-heading-compact-01:    0.875rem;
  --cds-heading-compact-01-fw: 600;
  --cds-heading-compact-01-ls: 0.16px;
  --cds-heading-01:     0.875rem;
  --cds-heading-01-fw:  600;
  --cds-heading-02:     1rem;
  --cds-heading-02-fw:  600;
  --cds-heading-03:     1.25rem;
  --cds-heading-03-fw:  400;
  --cds-heading-04:     1.75rem;
  --cds-heading-04-fw:  400;
  --cds-heading-05:     2rem;
  --cds-heading-05-fw:  300;
  --cds-heading-06:     2.625rem;
  --cds-heading-06-fw:  300;
  --cds-heading-07:     3.375rem;
  --cds-heading-07-fw:  300;
  --cds-fluid-heading-03: clamp(1.25rem, 2vw, 1.5rem);
  --cds-fluid-heading-04: clamp(1.75rem, 3vw, 2rem);
  --cds-fluid-heading-05: clamp(2rem, 5vw, 3rem);
  --cds-fluid-heading-06: clamp(2.625rem, 7vw, 4.5rem);
  --cds-display-01:     2.625rem;
  --cds-display-02:     3.375rem;
  --cds-display-03:     clamp(2.625rem, 6vw, 4.5rem);
  --cds-display-04:     clamp(3.375rem, 8vw, 7.625rem);

  /* Carbon motion (easing) */
  --cds-motion-standard:     cubic-bezier(0.2, 0, 0.38, 0.9);
  --cds-motion-entrance:     cubic-bezier(0, 0, 0.38, 0.9);
  --cds-motion-exit:         cubic-bezier(0.2, 0, 1, 0.9);
  --cds-motion-expressive:   cubic-bezier(0.4, 0.14, 0.3, 1);
  --cds-duration-fast-01:    70ms;
  --cds-duration-fast-02:    110ms;
  --cds-duration-moderate-01: 150ms;
  --cds-duration-moderate-02: 240ms;
  --cds-duration-slow-01:    400ms;
  --cds-duration-slow-02:    700ms;

  /* Layout */
  --cds-header-height: 3rem;
  --cds-side-nav-width: 16rem;
  --grid-gutter:  var(--cds-spacing-05);
  --grid-margin:  clamp(1rem, 5vw, 5rem);
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
  font-size: var(--cds-body-01);
  line-height: var(--cds-body-01-lh);
  letter-spacing: var(--cds-body-01-ls);
  background: var(--cds-background);
  color: var(--cds-text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body.overlay-open { overflow: hidden; }

/* ── Carbon 16-col grid helper ──────────────────────────────── */
.cds--grid {
  max-width: 99rem;
  margin: 0 auto;
  padding: 0 var(--grid-margin);
}

.cds--row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(var(--grid-gutter) * -0.5);
}

[class*="cds--col"] {
  padding: 0 calc(var(--grid-gutter) * 0.5);
  flex: 0 0 100%;
  max-width: 100%;
}

@media (min-width: 42rem) {
  .cds--col-md-4 { flex: 0 0 50%; max-width: 50%; }
  .cds--col-md-8 { flex: 0 0 100%; max-width: 100%; }
}

@media (min-width: 66rem) {
  .cds--col-lg-4  { flex: 0 0 25%;      max-width: 25%; }
  .cds--col-lg-6  { flex: 0 0 37.5%;    max-width: 37.5%; }
  .cds--col-lg-8  { flex: 0 0 50%;      max-width: 50%; }
  .cds--col-lg-10 { flex: 0 0 62.5%;    max-width: 62.5%; }
  .cds--col-lg-12 { flex: 0 0 75%;      max-width: 75%; }
  .cds--col-lg-16 { flex: 0 0 100%;     max-width: 100%; }
}

/* ── Carbon Header (native cds-header web component overrides) ─ */
cds-header {
  --cds-layer-01: #262626;
}

/* Fallback header for non-WC rendering */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 8000;
  height: var(--cds-header-height);
  background: var(--cds-layer-01);
  border-bottom: 1px solid var(--cds-border-subtle-01);
  display: flex;
  align-items: center;
}

.site-header__menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--cds-header-height);
  height: var(--cds-header-height);
  background: none;
  border: none;
  border-right: 1px solid var(--cds-border-subtle-01);
  cursor: pointer;
  color: var(--cds-text-primary);
  transition: background var(--cds-duration-fast-02) var(--cds-motion-standard);
  flex-shrink: 0;
}
.site-header__menu-btn:hover { background: var(--cds-background-hover); }
.site-header__menu-btn svg { width: 1.25rem; height: 1.25rem; fill: currentColor; }

.site-header__name {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--cds-spacing-05);
  font-size: var(--cds-body-compact-01);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--cds-text-primary);
  text-decoration: none;
  border-right: 1px solid var(--cds-border-subtle-01);
  white-space: nowrap;
}
.site-header__name span { font-weight: 300; margin-left: var(--cds-spacing-02); color: var(--cds-text-secondary); }

.site-header__nav {
  display: flex;
  align-items: center;
  height: 100%;
}

.site-header__link {
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--cds-spacing-05);
  font-size: var(--cds-body-compact-01);
  letter-spacing: var(--cds-body-compact-01-ls);
  color: var(--cds-text-secondary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition:
    background var(--cds-duration-fast-02) var(--cds-motion-standard),
    border-color var(--cds-duration-fast-02) var(--cds-motion-standard),
    color var(--cds-duration-fast-02) var(--cds-motion-standard);
}
.site-header__link:hover { background: var(--cds-background-hover); color: var(--cds-text-primary); }
.site-header__link.active { border-bottom-color: var(--cds-interactive); color: var(--cds-text-primary); }

@media (max-width: 65.9rem) { .site-header__nav { display: none; } }

/* ── Carbon Side Nav ─────────────────────────────────────────── */
.site-side-nav {
  position: fixed;
  top: var(--cds-header-height);
  left: 0; bottom: 0;
  width: var(--cds-side-nav-width);
  background: var(--cds-layer-01);
  border-right: 1px solid var(--cds-border-subtle-01);
  z-index: 7999;
  transform: translateX(-100%);
  transition: transform var(--cds-duration-moderate-02) var(--cds-motion-entrance);
  overflow-y: auto;
  padding: var(--cds-spacing-03) 0;
}
.site-side-nav.open { transform: translateX(0); }

.site-side-nav__overlay {
  position: fixed; inset: 0;
  background: var(--cds-overlay);
  z-index: 7998;
  opacity: 0; pointer-events: none;
  transition: opacity var(--cds-duration-moderate-01) var(--cds-motion-standard);
}
.site-side-nav.open ~ .site-side-nav__overlay { opacity: 1; pointer-events: all; }

.site-side-nav__header {
  padding: var(--cds-spacing-05) var(--cds-spacing-05) var(--cds-spacing-03);
  font-size: var(--cds-label-01);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  border-bottom: 1px solid var(--cds-border-subtle-01);
  margin-bottom: var(--cds-spacing-02);
}

.site-side-nav__link {
  display: flex;
  align-items: center;
  gap: var(--cds-spacing-04);
  height: 2.5rem;
  padding: 0 var(--cds-spacing-05);
  font-size: var(--cds-body-compact-01);
  color: var(--cds-text-secondary);
  text-decoration: none;
  transition: background var(--cds-duration-fast-02) var(--cds-motion-standard), color var(--cds-duration-fast-02);
}
.site-side-nav__link svg { width: 1rem; height: 1rem; fill: currentColor; flex-shrink: 0; }
.site-side-nav__link:hover { background: var(--cds-layer-hover-01); color: var(--cds-text-primary); }

/* ── Leadspace (Carbon Leadspace pattern) ────────────────────── */
.leadspace {
  margin-top: var(--cds-header-height);
  min-height: calc(100vh - var(--cds-header-height));
  background: var(--cds-background);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--cds-spacing-12) var(--grid-margin);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--cds-border-subtle-01);
}

/* Carbon 16-col decorative grid lines */
.leadspace__lines {
  position: absolute; inset: 0;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  pointer-events: none;
  z-index: 0;
}
.leadspace__lines span {
  border-right: 1px solid var(--cds-border-subtle-01);
  opacity: 0.4;
}

.leadspace__tag {
  position: relative; z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: var(--cds-spacing-03);
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  margin-bottom: var(--cds-spacing-06);
}
.leadspace__tag::before {
  content: '';
  display: block; width: 1rem; height: 1px;
  background: var(--cds-interactive);
}

.leadspace__heading {
  position: relative; z-index: 1;
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: var(--cds-display-04);
  font-weight: 300;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--cds-text-primary);
  max-width: 52rem;
  margin-bottom: var(--cds-spacing-07);
}
.leadspace__heading em { font-style: italic; color: var(--ibm-blue-40); }

.leadspace__copy {
  position: relative; z-index: 1;
  font-size: var(--cds-body-02);
  line-height: var(--cds-body-02-lh);
  color: var(--cds-text-secondary);
  max-width: 28rem;
  margin-bottom: var(--cds-spacing-08);
}

.leadspace__actions {
  position: relative; z-index: 1;
  display: flex; gap: var(--cds-spacing-03); flex-wrap: wrap;
}

/* ── Carbon Button (matching spec exactly) ───────────────────── */
.cds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--cds-spacing-05);
  min-height: 3rem;
  min-width: 8rem;
  max-width: 20rem;
  padding: 0.875rem 1rem;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: var(--cds-body-compact-01);
  font-weight: 400;
  letter-spacing: var(--cds-body-compact-01-ls);
  line-height: var(--cds-body-compact-01-lh);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    background var(--cds-duration-fast-02) var(--cds-motion-standard),
    border-color var(--cds-duration-fast-02) var(--cds-motion-standard),
    color var(--cds-duration-fast-02) var(--cds-motion-standard),
    box-shadow var(--cds-duration-fast-02) var(--cds-motion-standard);
  position: relative;
  user-select: none;
}
.cds-btn svg { width: 1rem; height: 1rem; fill: currentColor; flex-shrink: 0; }
.cds-btn:focus-visible { outline: 2px solid var(--cds-focus); outline-offset: -2px; }

/* Primary */
.cds-btn--primary {
  background: var(--ibm-blue-60);
  color: var(--cds-text-on-color);
  border-color: var(--ibm-blue-60);
}
.cds-btn--primary:hover { background: var(--ibm-blue-70); border-color: var(--ibm-blue-70); }
.cds-btn--primary:active { background: var(--ibm-blue-80); }

/* Secondary */
.cds-btn--secondary {
  background: var(--cds-layer-02);
  color: var(--cds-text-primary);
  border-color: var(--cds-layer-02);
}
.cds-btn--secondary:hover { background: var(--cds-layer-hover-02); }
.cds-btn--secondary:active { background: var(--cds-layer-active-01); }

/* Tertiary (outlined) */
.cds-btn--tertiary {
  background: transparent;
  color: var(--ibm-blue-40);
  border-color: var(--ibm-blue-40);
}
.cds-btn--tertiary:hover { background: rgba(69,137,255,0.1); }

/* Ghost */
.cds-btn--ghost {
  background: transparent;
  color: var(--cds-link-primary);
  border-color: transparent;
  padding-right: var(--cds-spacing-03);
  min-width: unset;
}
.cds-btn--ghost:hover { background: var(--cds-background-hover); }

/* ── Carbon Tag ──────────────────────────────────────────────── */
.cds-tag, cds-tag {
  display: inline-flex;
  align-items: center;
  height: 1.5rem;
  padding: 0 var(--cds-spacing-03);
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  font-weight: 400;
  border-radius: 0.9375rem;
  white-space: nowrap;
  gap: var(--cds-spacing-02);
}

/* Tag colour variants (G100 tokens) */
.cds-tag--blue   { background: rgba(69,137,255,0.2); color: var(--ibm-blue-20); }
.cds-tag--cyan   { background: rgba(28,174,235,0.2); color: #bae6ff; }
.cds-tag--teal   { background: rgba(0,163,158,0.2);  color: #9ef0f0; }
.cds-tag--green  { background: rgba(66,190,101,0.2); color: #6fdc8c; }
.cds-tag--purple { background: rgba(190,149,255,0.2);color: var(--ibm-purple-40); }
.cds-tag--red    { background: rgba(255,131,137,0.2);color: var(--ibm-red-40); }
.cds-tag--magenta{ background: rgba(255,127,178,0.2);color: #ffafd2; }
.cds-tag--gray   { background: var(--cds-layer-02);  color: var(--cds-text-secondary); }
.cds-tag--warm-gray { background: rgba(115,107,99,0.3); color: #d5bdaf; }
.cds-tag--cool-gray { background: rgba(99,107,115,0.3); color: #bdc5d1; }

/* G10 tag (light sections) */
.cds-tag--gray-g10 { background: rgba(0,0,0,0.08); color: #525252; }
.cds-tag--blue-g10 { background: rgba(15,98,254,0.1); color: #0f62fe; }

/* ── Carbon Loading (spinner) ────────────────────────────────── */
.cds-loading {
  display: block;
  width: 5rem; height: 5rem;
  animation: cds-rotate var(--cds-duration-slow-02) linear infinite;
}
.cds-loading__circle {
  fill: none;
  stroke: var(--cds-interactive);
  stroke-width: 5;
  stroke-linecap: square;
  stroke-dasharray: 240;
  stroke-dashoffset: 60;
}
@keyframes cds-rotate { to { transform: rotate(360deg); transform-origin: 50% 50%; } }

.cds-loading--sm { width: 1.5rem; height: 1.5rem; }
.cds-loading--sm .cds-loading__circle { stroke-width: 8; stroke-dasharray: 240; stroke-dashoffset: 80; }

/* ── Carbon Inline Notification ─────────────────────────────── */
.cds-inline-notification {
  display: flex;
  align-items: flex-start;
  gap: var(--cds-spacing-04);
  padding: var(--cds-spacing-04) var(--cds-spacing-05);
  font-size: var(--cds-body-compact-01);
  line-height: 1.5;
  border-left: 3px solid;
  max-width: 48rem;
}
.cds-inline-notification__icon { width: 1.25rem; height: 1.25rem; fill: currentColor; flex-shrink: 0; margin-top: 0.05rem; }
.cds-inline-notification--info     { background: rgba(69,137,255,0.15); border-left-color: var(--cds-support-info);    color: var(--cds-text-secondary); }
.cds-inline-notification--success  { background: rgba(66,190,101,0.12); border-left-color: var(--cds-support-success); color: var(--cds-text-secondary); }
.cds-inline-notification--warning  { background: rgba(241,194,27,0.15); border-left-color: var(--cds-support-warning); color: var(--cds-text-secondary); }
.cds-inline-notification--error    { background: rgba(255,131,137,0.15); border-left-color: var(--cds-support-error);  color: var(--cds-text-secondary); }

/* ── Carbon Structured List ─────────────────────────────────── */
.cds-structured-list { width: 100%; border-collapse: collapse; }
.cds-structured-list__row {
  display: grid;
  grid-template-columns: 7rem 1fr;
  border-top: 1px solid var(--cds-border-subtle-01);
  gap: var(--cds-spacing-04);
  padding: var(--cds-spacing-04) 0;
}
.cds-structured-list__row:last-child { border-bottom: 1px solid var(--cds-border-subtle-01); }
.cds-structured-list__head {
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  padding-top: 0.1rem;
}
.cds-structured-list__cell { font-size: var(--cds-body-compact-01); color: var(--cds-text-primary); }
.cds-structured-list__tags { display: flex; flex-wrap: wrap; gap: var(--cds-spacing-02); }

/* ── Section base ────────────────────────────────────────────── */
.cds-section {
  padding: var(--cds-spacing-12) var(--grid-margin);
  border-bottom: 1px solid var(--cds-border-subtle-01);
}

/* G10 (light) contrast section */
.cds-section--g10 {
  background: var(--cds-g10-background);
  color: var(--cds-g10-text-primary);
  border-color: var(--cds-g10-border-subtle);
}
.cds-section--g10 .cds-section__label { color: var(--cds-g10-text-secondary); }
.cds-section--g10 .cds-section__label::after { background: var(--cds-g10-border-subtle); }
.cds-section--g10 .cds-section__heading { color: var(--cds-g10-text-primary); }
.cds-section--g10 .cds-section__heading em { color: var(--cds-g10-interactive); }
.cds-section--g10 .cds-section__body { color: var(--cds-g10-text-secondary); }

.cds-section__label {
  display: flex;
  align-items: center;
  gap: var(--cds-spacing-04);
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  margin-bottom: var(--cds-spacing-07);
}
.cds-section__label svg { width: 1rem; height: 1rem; fill: currentColor; }
.cds-section__label::after { content: ''; flex: 1; height: 1px; background: var(--cds-border-subtle-01); }

.cds-section__heading {
  font-family: 'IBM Plex Serif', Georgia, serif;
  font-size: var(--cds-fluid-heading-06);
  font-weight: 300;
  line-height: 1.1;
  color: var(--cds-text-primary);
  margin-bottom: var(--cds-spacing-07);
  max-width: 40rem;
}
.cds-section__heading em { font-style: italic; color: var(--ibm-blue-40); }

.cds-section__body {
  font-size: var(--cds-body-02);
  line-height: var(--cds-body-02-lh);
  color: var(--cds-text-secondary);
  max-width: 36rem;
  margin-bottom: var(--cds-spacing-06);
}

/* ── About grid ──────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cds-spacing-10);
  align-items: start;
  margin-top: var(--cds-spacing-09);
}
@media (max-width: 65.9rem) { .about-grid { grid-template-columns: 1fr; gap: var(--cds-spacing-07); } }

.about-stat {
  border-top: 1px solid var(--cds-g10-border-subtle);
  padding-top: var(--cds-spacing-04);
  margin-bottom: var(--cds-spacing-07);
}

.about-stat__num {
  font-family: 'IBM Plex Serif', serif;
  font-size: var(--cds-display-04);
  font-weight: 300;
  line-height: 1;
  color: var(--cds-g10-text-primary);
}

.about-stat__label {
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-g10-text-secondary);
  margin-top: var(--cds-spacing-02);
}

/* ── Work grid ───────────────────────────────────────────────── */
.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--cds-border-subtle-01);
  border: 1px solid var(--cds-border-subtle-01);
  margin-top: var(--cds-spacing-09);
}
@media (max-width: 65.9rem) { .work-grid { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 41.9rem) { .work-grid { grid-template-columns: 1fr; } }

.work-item {
  background: var(--cds-layer-01);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  aspect-ratio: 4/3;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.work-item__bg {
  position: absolute; inset: 0;
  transition: transform var(--cds-duration-slow-01) var(--cds-motion-expressive);
}
.work-item:hover .work-item__bg { transform: scale(1.04); }

.work-item__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(22,22,22,0.9) 0%, rgba(22,22,22,0.25) 55%, transparent 100%);
  z-index: 1;
}

.work-item__content {
  position: relative; z-index: 2;
  padding: var(--cds-spacing-05);
  transition: transform var(--cds-duration-moderate-02) var(--cds-motion-standard);
}
.work-item:hover .work-item__content { transform: translateY(-4px); }

.work-item__tags {
  display: flex; gap: var(--cds-spacing-02); flex-wrap: wrap;
  margin-bottom: var(--cds-spacing-03);
}

.work-item__title {
  font-family: 'IBM Plex Serif', serif;
  font-size: var(--cds-heading-04);
  font-weight: var(--cds-heading-04-fw);
  line-height: 1.2;
  color: var(--cds-text-primary);
  margin-bottom: var(--cds-spacing-02);
}

.work-item__meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
}

.work-item__arrow {
  position: absolute;
  top: var(--cds-spacing-05); right: var(--cds-spacing-05);
  z-index: 3;
  width: 2rem; height: 2rem;
  background: var(--cds-interactive);
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transform: scale(0.75);
  transition:
    opacity var(--cds-duration-fast-02) var(--cds-motion-standard),
    transform var(--cds-duration-fast-02) var(--cds-motion-standard);
}
.work-item:hover .work-item__arrow { opacity: 1; transform: scale(1); }
.work-item__arrow svg { width: 1rem; height: 1rem; fill: white; }

/* Project bg gradients */
.bg-1 { background: linear-gradient(135deg, #2e1f14 0%, #1c1209 100%); }
.bg-2 { background: linear-gradient(135deg, #0d1c2e 0%, #060e1a 100%); }
.bg-3 { background: linear-gradient(135deg, #162014 0%, #0a130a 100%); }
.bg-4 { background: linear-gradient(135deg, #1c1c0a 0%, #0e0e06 100%); }
.bg-5 { background: linear-gradient(135deg, #1a1028 0%, #0d0814 100%); }
.bg-6 { background: linear-gradient(135deg, #0a1c1c 0%, #060e0e 100%); }

/* ── Services data table ─────────────────────────────────────── */
.cds-data-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: var(--cds-spacing-09);
  font-size: var(--cds-body-compact-01);
}

.cds-data-table thead tr {
  background: var(--cds-g10-layer-02);
  border-bottom: 1px solid var(--cds-g10-border-strong);
}

.cds-data-table th {
  padding: var(--cds-spacing-04) var(--cds-spacing-04);
  text-align: left;
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  font-weight: 600;
  color: var(--cds-g10-text-secondary);
  white-space: nowrap;
}

.cds-data-table tbody tr {
  border-top: 1px solid var(--cds-g10-border-subtle);
  transition: background var(--cds-duration-fast-01) var(--cds-motion-standard);
}
.cds-data-table tbody tr:hover { background: var(--cds-g10-hover); }

.cds-data-table td {
  padding: var(--cds-spacing-04) var(--cds-spacing-04);
  color: var(--cds-g10-text-primary);
  vertical-align: middle;
}

.table-num {
  font-family: 'IBM Plex Mono', monospace;
  color: var(--cds-g10-text-secondary);
  font-size: var(--cds-label-01);
  letter-spacing: 0.08em;
  width: 3rem;
}

.table-service { font-weight: 400; }
.table-desc { color: var(--cds-g10-text-secondary); }
@media (max-width: 41.9rem) { .table-desc { display: none; } }

/* ── Contact section ─────────────────────────────────────────── */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--cds-spacing-10);
  margin-top: var(--cds-spacing-09);
}
@media (max-width: 65.9rem) { .contact-grid { grid-template-columns: 1fr; } }

.contact-email {
  display: inline-block;
  font-family: 'IBM Plex Serif', serif;
  font-size: clamp(1.5rem, 4vw, var(--cds-heading-06));
  font-weight: 300;
  color: var(--cds-link-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--cds-link-primary);
  padding-bottom: var(--cds-spacing-01);
  margin-top: var(--cds-spacing-06);
  transition: color var(--cds-duration-fast-02) var(--cds-motion-standard), border-color var(--cds-duration-fast-02);
}
.contact-email:hover { color: var(--cds-link-primary-hover); border-color: var(--cds-link-primary-hover); }

.contact-meta {
  margin-top: var(--cds-spacing-07);
  display: flex; flex-direction: column; gap: var(--cds-spacing-04);
}
.contact-meta-row {
  display: flex; align-items: center; gap: var(--cds-spacing-03);
  font-size: var(--cds-body-compact-01);
  color: var(--cds-text-secondary);
}
.contact-meta-row svg { width: 1rem; height: 1rem; fill: currentColor; flex-shrink: 0; }

/* ── Footer ──────────────────────────────────────────────────── */
.site-footer {
  padding: var(--cds-spacing-07) var(--grid-margin);
  border-top: 1px solid var(--cds-border-subtle-01);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--cds-spacing-05);
}
.site-footer__brand {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cds-text-secondary);
}
.site-footer__copy {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  color: var(--cds-text-placeholder);
}

/* ── Back to top ─────────────────────────────────────────────── */
#back-top {
  position: fixed;
  bottom: var(--cds-spacing-07);
  right: var(--cds-spacing-07);
  z-index: 500;
  width: 3rem; height: 3rem;
  background: var(--ibm-blue-60);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  opacity: 0;
  transform: translateY(1rem);
  transition:
    opacity var(--cds-duration-moderate-01) var(--cds-motion-standard),
    transform var(--cds-duration-moderate-01) var(--cds-motion-standard),
    background var(--cds-duration-fast-02) var(--cds-motion-standard);
}
#back-top.visible { opacity: 1; transform: none; }
#back-top:hover { background: var(--ibm-blue-70); }
#back-top svg { width: 1.25rem; height: 1.25rem; fill: currentColor; }

/* ── Scroll reveal ───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(var(--cds-spacing-06));
  transition:
    opacity var(--cds-duration-slow-01) var(--cds-motion-entrance),
    transform var(--cds-duration-slow-01) var(--cds-motion-entrance);
}
.reveal.visible { opacity: 1; transform: none; }

/* ── Project overlay ─────────────────────────────────────────── */
#project-overlay { position: fixed; inset: 0; z-index: 9000; pointer-events: none; }

#overlay-card {
  position: absolute;
  overflow: hidden;
  background: var(--cds-background);
}
#overlay-card.animating {
  transition:
    top    var(--cds-duration-moderate-02) var(--cds-motion-expressive),
    left   var(--cds-duration-moderate-02) var(--cds-motion-expressive),
    width  var(--cds-duration-moderate-02) var(--cds-motion-expressive),
    height var(--cds-duration-moderate-02) var(--cds-motion-expressive),
    opacity var(--cds-duration-moderate-02);
}

#overlay-bg-clone { position: absolute; inset: 0; }

#overlay-content {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  opacity: 0;
  transition: opacity var(--cds-duration-moderate-01) var(--cds-motion-standard);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  background: var(--cds-background);
}
#overlay-content.visible { opacity: 1; }

/* Overlay page header */
.overlay-page-header {
  position: relative;
  min-height: 50vh;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--cds-spacing-11) var(--grid-margin) var(--cds-spacing-09);
  border-bottom: 1px solid var(--cds-border-subtle-01);
  overflow: hidden;
}
.overlay-page-header__bg { position: absolute; inset: 0; }
.overlay-page-header__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(22,22,22,0.96) 0%, rgba(22,22,22,0.55) 60%, rgba(22,22,22,0.15) 100%);
}
.overlay-page-header__inner { position: relative; z-index: 1; }
.overlay-page-header__eyebrow {
  display: flex; align-items: center; gap: var(--cds-spacing-03);
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  margin-bottom: var(--cds-spacing-05);
}
.overlay-page-header__eyebrow svg { width: 1rem; height: 1rem; fill: currentColor; }
.overlay-page-header__title {
  font-family: 'IBM Plex Serif', serif;
  font-size: clamp(2.5rem, 7vw, var(--cds-display-04));
  font-weight: 300;
  line-height: 1.05;
  color: var(--cds-text-primary);
  margin-bottom: var(--cds-spacing-05);
}
.overlay-page-header__tags { display: flex; gap: var(--cds-spacing-02); flex-wrap: wrap; }

/* Overlay two-col body */
.overlay-two-col {
  display: grid;
  grid-template-columns: 1fr 20rem;
  gap: 1px;
  background: var(--cds-border-subtle-01);
}
@media (max-width: 65.9rem) { .overlay-two-col { grid-template-columns: 1fr; } }

.overlay-main {
  background: var(--cds-background);
  padding: var(--cds-spacing-09) var(--grid-margin);
}
.overlay-sidebar {
  background: var(--cds-layer-01);
  padding: var(--cds-spacing-07) var(--cds-spacing-06);
}

.overlay-lead {
  font-family: 'IBM Plex Serif', serif;
  font-size: var(--cds-fluid-heading-04);
  font-weight: 300;
  line-height: 1.25;
  color: var(--cds-text-primary);
  margin-bottom: var(--cds-spacing-06);
  max-width: 36rem;
}
.overlay-lead em { font-style: italic; color: var(--ibm-blue-40); }

.overlay-body-text {
  font-size: var(--cds-body-02);
  line-height: var(--cds-body-02-lh);
  color: var(--cds-text-secondary);
  max-width: 40rem;
  margin-bottom: var(--cds-spacing-05);
}

/* Overlay media sections */
.overlay-media {
  padding: var(--cds-spacing-07) var(--grid-margin);
  border-top: 1px solid var(--cds-border-subtle-01);
}
.overlay-media--layer { background: var(--cds-layer-01); }

.overlay-media__label {
  display: flex; align-items: center; gap: var(--cds-spacing-03);
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  margin-bottom: var(--cds-spacing-05);
}
.overlay-media__label svg { width: 1rem; height: 1rem; fill: currentColor; }

.pdf-frame { border: 1px solid var(--cds-border-subtle-01); background: var(--cds-layer-02); }
.pdf-frame iframe { display: block; width: 100%; height: 640px; border: none; }

.pdf-toolbar {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--cds-spacing-04);
  padding: var(--cds-spacing-04) 0;
}
.pdf-caption { font-size: var(--cds-label-01); color: var(--cds-text-secondary); }

.video-frame {
  position: relative; width: 100%; padding-bottom: 56.25%;
  background: #000; border: 1px solid var(--cds-border-subtle-01);
}
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: none; }
.video-caption { font-size: var(--cds-label-01); color: var(--cds-text-secondary); margin-top: var(--cds-spacing-04); }

/* Embed section */
.overlay-embed {
  background: var(--cds-layer-01);
  border-top: 1px solid var(--cds-border-subtle-01);
  display: flex; flex-direction: column;
  min-height: 80vh;
}

.embed-toolbar {
  display: flex; align-items: center;
  height: var(--cds-header-height);
  padding: 0 var(--cds-spacing-05);
  background: var(--cds-layer-02);
  border-bottom: 1px solid var(--cds-border-subtle-01);
  gap: var(--cds-spacing-04);
}

.embed-toolbar__dots { display: flex; gap: 6px; }
.embed-toolbar__dots span { width: 12px; height: 12px; border-radius: 50%; display: block; }
.embed-toolbar__dots span:nth-child(1) { background: #ff5f57; }
.embed-toolbar__dots span:nth-child(2) { background: #febc2e; }
.embed-toolbar__dots span:nth-child(3) { background: #28c840; }

.embed-toolbar__url {
  flex: 1; display: flex; align-items: center; gap: var(--cds-spacing-02);
  height: 1.75rem;
  padding: 0 var(--cds-spacing-04);
  background: var(--cds-layer-01);
  border: 1px solid var(--cds-border-subtle-01);
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  color: var(--cds-text-secondary);
  overflow: hidden; white-space: nowrap; text-overflow: ellipsis;
}
.embed-toolbar__url svg { width: 0.875rem; height: 0.875rem; fill: currentColor; flex-shrink: 0; }

.embed-mode-toggle {
  display: flex;
  border: 1px solid var(--cds-border-subtle-01);
}
.embed-mode-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cds-text-secondary);
  background: var(--cds-layer-01);
  border: none;
  padding: 0 var(--cds-spacing-05);
  height: 2rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--cds-duration-fast-01) var(--cds-motion-standard), color var(--cds-duration-fast-01);
}
.embed-mode-btn + .embed-mode-btn { border-left: 1px solid var(--cds-border-subtle-01); }
.embed-mode-btn:hover { background: var(--cds-layer-hover-02); color: var(--cds-text-primary); }
.embed-mode-btn.active { background: var(--ibm-blue-60); color: #fff; }

.embed-explainer {
  padding: var(--cds-spacing-04) var(--cds-spacing-05);
  border-bottom: 1px solid var(--cds-border-subtle-01);
}

.embed-pane { flex: 1; position: relative; min-height: 600px; }
.embed-pane iframe { display: block; width: 100%; height: 100%; min-height: 600px; border: none; }
.embed-inject { flex: 1; overflow-y: auto; background: var(--cds-g10-background); position: relative; }

.embed-loader {
  position: absolute; inset: 0; z-index: 5;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--cds-spacing-05);
  background: var(--cds-layer-01);
  transition: opacity var(--cds-duration-fast-02) var(--cds-motion-standard);
}
.embed-loader.hidden { opacity: 0; pointer-events: none; }
.embed-loader__label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: var(--cds-label-01);
  letter-spacing: var(--cds-label-01-ls);
  text-transform: uppercase;
  color: var(--cds-text-secondary);
}

.embed-error {
  display: none;
  flex-direction: column; align-items: center; justify-content: center;
  gap: var(--cds-spacing-04); padding: var(--cds-spacing-11);
  text-align: center;
  font-size: var(--cds-body-compact-01);
  color: var(--cds-text-secondary);
  min-height: 300px;
}
.embed-error svg { width: 2rem; height: 2rem; fill: var(--cds-support-error); }

/* ── Overlay close button ────────────────────────────────────── */
#overlay-close {
  position: fixed;
  top: var(--cds-spacing-04); right: var(--cds-spacing-04);
  z-index: 9100;
  width: var(--cds-header-height); height: var(--cds-header-height);
  background: var(--cds-layer-02);
  border: 1px solid var(--cds-border-subtle-01);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--cds-text-primary);
  opacity: 0; pointer-events: none;
  transition:
    opacity var(--cds-duration-moderate-01) var(--cds-motion-standard),
    background var(--cds-duration-fast-02) var(--cds-motion-standard);
}
#overlay-close.visible { opacity: 1; pointer-events: all; }
#overlay-close:hover { background: var(--cds-layer-03); }
#overlay-close svg { width: 1.25rem; height: 1.25rem; fill: currentColor; }