/* Sunnyday dark theme for sunn3d.com.
   Applies when <html data-sdt-theme="dark">. Loaded after the inline page styles, so
   selectors carry the html[data-sdt-theme] prefix to outrank the light-theme !important rules. */

html[data-sdt-theme="dark"] {
  color-scheme: dark;
  background-color: #061321;
  --d-bg: #061321;
  --d-panel: rgba(11, 28, 48, 0.88);
  --d-panel-solid: #0b1c30;
  --d-line: #1d3552;
  --d-line-2: #2a4566;
  --d-ink: #f0f4f7;
  --d-text: #c9d6e0;
  --d-muted: #9fb2c2;
  --d-link: #a8e81a;
  --d-link-hover: #c9f56a;
  --d-green: #97d700;
}

/* Base: navy glow over near-black navy, behind everything. */
html[data-sdt-theme="dark"] body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(1100px 560px at 80% -8%, rgba(1, 58, 115, 0.55), rgba(1, 58, 115, 0) 70%),
    radial-gradient(900px 620px at -10% 45%, rgba(1, 58, 115, 0.26), rgba(1, 58, 115, 0) 70%),
    linear-gradient(180deg, #061321, #040d18);
}

html[data-sdt-theme="dark"] body,
html[data-sdt-theme="dark"] body #page,
html[data-sdt-theme="dark"] body :is(.site-main, main, .page-content, .entry-content, #content, article, .site-content, .sdt-design):not(.convergence-paper) {
  background: transparent !important;
  color: var(--d-text) !important;
}

/* Text */
html[data-sdt-theme="dark"] body :is(p, li, dd, dt, figcaption, label, small, address, .elementor):not(:is(.paper, .wide, .convergence-paper) *) {
  color: var(--d-text) !important;
  text-shadow: none !important;
}
html[data-sdt-theme="dark"] body :is(h1, h2, h3, h4, h5, h6, .entry-title, .elementor-heading-title):not(:is(.paper, .wide, .convergence-paper) *) {
  color: var(--d-ink) !important;
  text-shadow: none !important;
}
html[data-sdt-theme="dark"] body :is(strong, b, em):not(:is(.paper, .wide, .convergence-paper) *) { color: var(--d-ink) !important; }
html[data-sdt-theme="dark"] body hr { border-color: var(--d-line) !important; background: var(--d-line) !important; }
html[data-sdt-theme="dark"] ::selection { background: var(--d-green); color: #061321; }

/* Links inside page content (header, footers and buttons have their own rules). */
html[data-sdt-theme="dark"] body :is(main, .page-content, .entry-content, article, .site-main) a:not(.elementor-button):not(.wp-block-button__link):not(.button):not(.sd-button):not(.retro-download):not(:is(.paper, .wide, .convergence-paper) *) {
  color: var(--d-link) !important;
  border-bottom-color: rgba(168, 232, 26, 0.32) !important;
  text-decoration-color: rgba(168, 232, 26, 0.32) !important;
}
html[data-sdt-theme="dark"] body :is(main, .page-content, .entry-content, article, .site-main) a:not(.elementor-button):not(.wp-block-button__link):not(.button):not(.sd-button):not(.retro-download):not(:is(.paper, .wide, .convergence-paper) *):hover {
  color: var(--d-link-hover) !important;
  border-bottom-color: var(--d-link-hover) !important;
}

/* Panels, tables, code, forms */
html[data-sdt-theme="dark"] body :is(table):not(:is(.paper, .wide, .convergence-paper) *) {
  background: var(--d-panel) !important;
  color: var(--d-text) !important;
  border-color: var(--d-line) !important;
}
html[data-sdt-theme="dark"] body :is(th, td):not(:is(.paper, .wide, .convergence-paper) *) { border-color: var(--d-line) !important; color: var(--d-text) !important; }
html[data-sdt-theme="dark"] body :is(th):not(:is(.paper, .wide, .convergence-paper) *) { color: var(--d-ink) !important; background: rgba(16, 36, 59, 0.9) !important; }
html[data-sdt-theme="dark"] body :is(pre, code, kbd, samp):not(:is(.paper, .wide, .convergence-paper) *) {
  background: #0d2036 !important;
  color: #dce8f0 !important;
  border-color: var(--d-line) !important;
}
html[data-sdt-theme="dark"] body :is(blockquote):not(:is(.paper, .wide, .convergence-paper) *) {
  background: var(--d-panel) !important;
  color: var(--d-ink) !important;
  border-color: var(--d-line) !important;
  border-left-color: var(--d-green) !important;
}
html[data-sdt-theme="dark"] body :is(input, textarea, select):not(:is(.paper, .wide, .convergence-paper) *) {
  background: #0d2036 !important;
  color: var(--d-ink) !important;
  border-color: var(--d-line-2) !important;
}

/* Fixed header: dark glass, white wordmark, light links. */
html[data-sdt-theme="dark"] .sdt-cf-header {
  background: rgba(6, 19, 33, 0.86) !important;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 rgba(151, 215, 0, 0.55), 0 10px 30px rgba(0, 0, 0, 0.35) !important;
}
html[data-sdt-theme="dark"] .sdt-cf-header .sdt-cf-wordmark img { filter: brightness(0) invert(1) !important; }

/* Links outside page content. The light theme colors every non-home link with a
   body:not(.home) a:not(...)x3 !important rule, so these selectors carry the same :not() chain. */
html[data-sdt-theme="dark"] body:not(.sdt-x) .sdt-cf-header .sdt-cf-nav a:not(.elementor-button):not(.wp-block-button__link):not(.button) {
  color: #dce6ee !important;
  border-bottom-color: transparent !important;
}
html[data-sdt-theme="dark"] body:not(.sdt-x) .sdt-cf-header .sdt-cf-nav a:not(.elementor-button):not(.wp-block-button__link):not(.button):is(:hover, :focus-visible, [aria-current="page"]) {
  color: var(--d-green) !important;
}
html[data-sdt-theme="dark"] body:not(.sdt-x) :is(.site-footer, .sdt-netfooter, nav[aria-label="Sunnyday Technologies brand portfolio"]) a:not(.elementor-button):not(.wp-block-button__link):not(.button) {
  color: var(--d-text) !important;
  border-bottom-color: transparent !important;
}
html[data-sdt-theme="dark"] body:not(.sdt-x) :is(.site-footer, .sdt-netfooter, nav[aria-label="Sunnyday Technologies brand portfolio"]) a:not(.elementor-button):not(.wp-block-button__link):not(.button):is(:hover, [aria-current="page"]) {
  color: var(--d-green) !important;
}

/* Footers */
html[data-sdt-theme="dark"] :is(.site-footer, footer.site-footer, .elementor-location-footer) {
  background: transparent !important;
  border-top: 1px solid var(--d-line);
}
html[data-sdt-theme="dark"] .sdt-netfooter { border-top-color: var(--d-line); color: var(--d-muted); }

/* Homepage (.sdt-design): light cards become dark panels. */
html[data-sdt-theme="dark"] .sdt-design :is(.sd-eyebrow, .sd-update span) { color: var(--d-green) !important; }
html[data-sdt-theme="dark"] .sdt-design .sd-updates {
  background: var(--d-panel) !important;
  color: var(--d-text) !important;
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.45);
}
html[data-sdt-theme="dark"] .sdt-design .sd-updates-head h2 { color: var(--d-muted) !important; }
html[data-sdt-theme="dark"] .sdt-design .sd-update { color: var(--d-text) !important; border-bottom-color: var(--d-line) !important; }
html[data-sdt-theme="dark"] .sdt-design .sd-update h3 { color: var(--d-ink) !important; }
html[data-sdt-theme="dark"] .sdt-design .sd-projects { background: var(--d-line) !important; border-color: var(--d-line) !important; }
html[data-sdt-theme="dark"] .sdt-design .sd-project { background: var(--d-panel-solid) !important; }
html[data-sdt-theme="dark"] .sdt-design :is(.sd-number, .sd-limits, .sd-section-head > p, .sd-project p, .sd-update p) { color: var(--d-muted) !important; }
html[data-sdt-theme="dark"] .sdt-design :is(.sd-project a, .sd-updates-head a) { color: var(--d-link) !important; }
html[data-sdt-theme="dark"] .sdt-design .sd-contact { background: rgba(4, 13, 24, 0.75) !important; }

/* Review and status notices (inline light-green style on articles). */
html[data-sdt-theme="dark"] body .sdt-review-notice {
  background: rgba(151, 215, 0, 0.08) !important;
  color: var(--d-text) !important;
}

/* Research-paper pages stay as white document sheets on the dark site. */
html[data-sdt-theme="dark"] body :is(.paper, .wide) {
  background: #fff;
  color: #1f2a33;
  max-width: 840px;
  padding-inline: clamp(20px, 5vw, 56px);
  border-radius: 6px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}
html[data-sdt-theme="dark"] body .wide { max-width: 1040px; padding-block: 1px; }
html[data-sdt-theme="dark"] body main.convergence-paper {
  padding-top: 1.5rem !important;
  border-radius: 6px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

/* Older page header used on research pages, and the minimal search page header. */
html[data-sdt-theme="dark"] .retro-site-header {
  background: rgba(6, 19, 33, 0.9) !important;
  border-bottom-color: var(--d-green) !important;
}
html[data-sdt-theme="dark"] .retro-site-header img { filter: brightness(0) invert(1) !important; }
html[data-sdt-theme="dark"] body:not(.sdt-x) .retro-site-header a:not(.elementor-button):not(.wp-block-button__link):not(.button) {
  color: #dce6ee !important;
  border-bottom-color: transparent !important;
}
html[data-sdt-theme="dark"] body > header > a { color: var(--d-ink) !important; }

/* ---- Background layers (created by sdt-bg.js) ---- */
html[data-sdt-theme="dark"] .sdt-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
html[data-sdt-theme="dark"] .sdt-bg canvas { display: block; width: 100%; height: 100%; }

/* Printed layers: staggered concrete beads, rising slowly. CSS only. */
html[data-sdt-theme="dark"] .sdt-bg--layers::before {
  content: "";
  position: absolute;
  inset: 0 0 -52px 0;
  opacity: 0.085;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='112' height='26'%3E%3Cg fill='none' stroke='%23a9cbef' stroke-width='1.1'%3E%3Crect x='3' y='2' width='50' height='10' rx='5'/%3E%3Crect x='59' y='2' width='50' height='10' rx='5'/%3E%3Crect x='-25' y='15' width='50' height='10' rx='5'/%3E%3Crect x='31' y='15' width='50' height='10' rx='5'/%3E%3Crect x='87' y='15' width='50' height='10' rx='5'/%3E%3C/g%3E%3C/svg%3E") 0 0 / 112px 26px repeat;
  -webkit-mask-image: radial-gradient(ellipse 85% 75% at 74% 18%, #000 0%, rgba(0, 0, 0, 0.45) 55%, transparent 92%);
  mask-image: radial-gradient(ellipse 85% 75% at 74% 18%, #000 0%, rgba(0, 0, 0, 0.45) 55%, transparent 92%);
  animation: sdt-layers-rise 40s linear infinite;
  will-change: transform;
}
@keyframes sdt-layers-rise { to { transform: translate3d(0, -52px, 0); } }

/* Ghosted print video: blue-tinted, faint, darkened where text sits. */
html[data-sdt-theme="dark"] .sdt-bg--video :is(video, img) {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.12);
  filter: grayscale(1) sepia(0.6) hue-rotate(170deg) saturate(1.6) brightness(0.6) contrast(1.1) blur(3px);
  opacity: 0.32;
}
html[data-sdt-theme="dark"] .sdt-bg--video::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 19, 33, 0.8) 0%, rgba(6, 19, 33, 0.5) 55%, rgba(6, 19, 33, 0.3) 100%),
    linear-gradient(0deg, rgba(6, 19, 33, 0.75), rgba(6, 19, 33, 0) 60%);
}

@media (prefers-reduced-motion: reduce) {
  html[data-sdt-theme="dark"] .sdt-bg--layers::before { animation: none; will-change: auto; }
}