/* Shared theme tokens keep all pages and native controls in the same mode. */
:root {
  --hero-surface: #fff;
  --image-surface: #e7e5df;
  --surface-overlay: rgba(248, 247, 244, .95);
  --selection-background: #cddaff;
  --button-blue: #2446e6;
  --button-blue-hover: #193ac6;
}
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #12151b;
  --ink: #f0f1f5;
  --muted: #b0b7c5;
  --line: #353c49;
  --accent: #96b5ff;
  --wash: #1c222d;
  --hero-surface: #12151b;
  --image-surface: #222833;
  --surface-overlay: rgba(28, 34, 45, .96);
  --selection-background: #334c7d;
}
::selection { background: var(--selection-background); color: var(--ink); }
.hero { background: var(--hero-surface); }
.site-intro { background: var(--paper); }
.intro-word { color: var(--ink); }
.intro-cursor { background: var(--accent); }
.image-label, .tac-expand { background: var(--surface-overlay); }

.theme-toggle, .theme-toggle[hidden] { display: none; }
.theme-toggle:not([hidden]) { display: inline-flex; }
.theme-toggle {
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background .2s, border-color .2s;
}
.theme-toggle:hover { background: var(--wash); border-color: var(--muted); }
.theme-toggle .icon { width: 20px; height: 20px; }
.theme-toggle .theme-sun { display: none; }
[data-theme="dark"] .theme-toggle .theme-moon { display: none; }
[data-theme="dark"] .theme-toggle .theme-sun { display: inline-block; }

/* Override UI surfaces only; artwork, photographs, and brand colors stay true. */
[data-theme="dark"] .skip-link { color: var(--paper); }
[data-theme="dark"] .project-image { background: var(--image-surface); }
[data-theme="dark"] .project-image-contain,
[data-theme="dark"] .inner-phone-project .project-image { background: var(--wash); }
[data-theme="dark"] .round-arrow,
[data-theme="dark"] .tags li,
[data-theme="dark"] .contact-arrow { border-color: var(--line); }
[data-theme="dark"] .email-link { text-decoration-color: var(--muted); }
[data-theme="dark"] .inner-contact-card:hover { background: #283449; }
[data-theme="dark"] .tac-page .heading-accent,
[data-theme="dark"] .tac-toc a:hover { color: var(--accent); }
[data-theme="dark"] .tac-color-card { background: var(--wash); border-color: var(--line); box-shadow: none; }
[data-theme="dark"] .tac-color-info { color: var(--ink); }
[data-theme="dark"] .tac-type-primary,
[data-theme="dark"] .tac-product-story { background: var(--wash); }
[data-theme="dark"] .tac-product-aside h2 { color: var(--ink); }

@media (max-width: 700px) {
  .site-header { gap: 12px; }
  .nav-ready[data-theme="dark"] .site-nav { box-shadow: 0 18px 40px #0006; }
}
@media (prefers-reduced-motion: reduce) {
  .theme-toggle { transition: none; }
}

/* Keep filled blue accents focused on the two primary actions. */
.site-nav .nav-contact,
.site-nav .nav-contact[aria-current="page"] {
  background: var(--button-blue);
  border-color: var(--button-blue);
  color: #fff;
}
.site-nav .nav-contact:hover,
.site-nav .nav-contact[aria-current="page"]:hover {
  background: var(--button-blue-hover);
  border-color: var(--button-blue-hover);
  color: #fff;
}
.hero .hero-bottom > .text-link {
  min-height: 56px;
  padding: 10px 12px 10px 22px;
  border: 1px solid var(--button-blue);
  border-radius: 999px;
  background: var(--button-blue);
  color: #fff;
  font-weight: 650;
  transition: background .2s, border-color .2s;
}
.hero .hero-bottom > .text-link:hover {
  background: var(--button-blue-hover);
  border-color: var(--button-blue-hover);
  color: #fff;
}
.hero .hero-bottom .round-arrow {
  border-color: #ffffff66;
  background: #ffffff14;
  color: #fff;
}
@media (max-width: 700px) {
  .nav-ready .site-nav .nav-contact {
    padding: 12px 14px;
    border: 1px solid var(--button-blue);
    border-radius: 7px;
    background: var(--button-blue);
    color: #fff;
  }
  .nav-ready .site-nav .nav-contact:hover {
    background: var(--button-blue-hover);
    border-color: var(--button-blue-hover);
    color: #fff;
  }
}
@media (prefers-reduced-motion: reduce) {
  .hero .hero-bottom > .text-link { transition: none; }
}

/* A full-width blue footer gives every page a distinct closing section. */
.site-footer {
  width: 100%;
  margin-inline: 0;
  padding-inline: max(56px, calc((100% - 1280px) / 2));
  border-top: 0;
  background: #2446e6;
  color: #fff;
}
.site-footer .social-links a:hover,
.site-footer .back-to-top:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.site-footer a:focus-visible { outline-color: #fff; }
.contact-section, .inner-cta, .case-contact {
  width: 100%;
  margin-inline: 0;
  padding-inline: max(56px, calc((100% - 1280px) / 2));
  background: #2446e6;
  color: #fff;
  border-color: #ffffff38;
}
.contact-section { padding-block: 64px; }
.inner-cta { padding-block: 52px; }
.case-contact { margin-top: 0; padding-block: 56px 64px; }
.case-page .case-contact { margin-top: 0; }
.contact-section .eyebrow, .case-contact .eyebrow { color: #e0e8ff; }
.contact-section .heading-accent, .case-contact .heading-accent { color: #d3dfff; }
.case-page .case-contact .heading-accent { color: #d3dfff; }
.contact-section a:hover, .inner-cta a:hover, .case-contact a:hover { color: #d3dfff; }
.contact-section a:focus-visible, .inner-cta a:focus-visible, .case-contact a:focus-visible { outline-color: #fff; }
.contact-section .contact-arrow { border-color: #ffffff80; }
.contact-section .contact-arrow:hover { background: #fff; color: #2446e6; }
.contact-section .email-link { text-decoration-color: #d3dfff; }
[data-theme="dark"] .contact-section .contact-arrow { border-color: #ffffff80; }
[data-theme="dark"] .contact-section .email-link { text-decoration-color: #d3dfff; }
.site-footer { border-top: 1px solid #ffffff38; }
@media (max-width: 1000px) {
  .site-footer, .contact-section, .inner-cta, .case-contact { padding-inline: 36px; }
}
@media (max-width: 700px) {
  .site-footer, .contact-section, .inner-cta, .case-contact { padding-inline: 20px; }
  .contact-section, .case-contact { padding-block: 40px; }
  .inner-cta { padding-block: 36px; }
}