/* Clean Technical: shared visual system for the resume and project notebook.
   Keep this file after the shared and page-specific stylesheets. */
:root {
  color-scheme: light;
  --paper: #ffffff;
  --ink: #1c2c40;
  --muted: #566578;
  --line: #d9e1e9;
  --accent: #2e5f91;
  --surface: #f4f7fa;
  --strong-surface: #1c2c40;
  --on-strong: #ffffff;
  --strong-hover: #2e5f91;
  --chip-ink: #455d76;
  --hover-surface: #e4eef8;
  --hover-border: #93b0ce;
  --tag-surface: #f0f5fa;
  --tag-border: #d0deec;
  --link-rule: #8ca8c4;
  --model-surface: #f1f5f9;
  --model-grid: #d6e0eb60;
  --timeline-rule: #b9cbdc;
  font-family: "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #14202e;
  --ink: #e8edf3;
  --muted: #aebbc9;
  --line: #344355;
  --accent: #9bbfe5;
  --surface: #1c293a;
  --strong-surface: #b8cce3;
  --on-strong: #172536;
  --strong-hover: #cfdef0;
  --chip-ink: #bed0e4;
  --hover-surface: #263a52;
  --hover-border: #6e8fb6;
  --tag-surface: #202f43;
  --tag-border: #3c526d;
  --link-rule: #7b9bbf;
  --model-surface: #192739;
  --model-grid: #769ac52b;
  --timeline-rule: #425c7a;
}

/* Honor the system setting when scripting is unavailable. An explicit user
   preference always takes precedence over this fallback. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --paper: #14202e;
    --ink: #e8edf3;
    --muted: #aebbc9;
    --line: #344355;
    --accent: #9bbfe5;
    --surface: #1c293a;
    --strong-surface: #b8cce3;
    --on-strong: #172536;
    --strong-hover: #cfdef0;
    --chip-ink: #bed0e4;
    --hover-surface: #263a52;
    --hover-border: #6e8fb6;
    --tag-surface: #202f43;
    --tag-border: #3c526d;
    --link-rule: #7b9bbf;
    --model-surface: #192739;
    --model-grid: #769ac52b;
    --timeline-rule: #425c7a;
  }
}

body { color: var(--ink); background: var(--paper); }
.page { max-width: 1140px; padding-inline: 48px; }
.site-header { padding-block: 22px; }
.brand { font-weight: 600; }
.monogram {
  border-radius: 6px;
  background: var(--strong-surface);
  color: var(--on-strong);
  font-size: 18px;
}
.header-actions { display: flex; align-items: center; gap: 26px; }
.site-header nav { width: auto; }
.site-header nav a[aria-current] { border-bottom-color: var(--accent); }
.site-header nav a:hover { color: var(--accent); }
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
}
.theme-toggle:hover { background: var(--surface); border-color: var(--hover-border); color: var(--accent); }
.theme-toggle[hidden] { display: none; }
.theme-toggle svg { width: 18px; height: 18px; flex-shrink: 0; pointer-events: none; }
.theme-toggle .theme-icon-sun { display: none; }
.theme-toggle .theme-icon-moon { display: block; }
:root[data-theme="dark"] .theme-toggle .theme-icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .theme-icon-moon { display: none; }
a:focus-visible, button:focus-visible, .skill-tag:focus-visible,
#skill-list > summary:focus-visible, .viewer-reset:focus-visible,
model-viewer:focus-visible { outline-color: var(--accent); }
.theme-toggle:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
.skip-link { background: var(--strong-surface); color: var(--on-strong); }

h1 { font-size: clamp(42px, 5.5vw, 68px); font-weight: 650; letter-spacing: -2.5px; line-height: 1.08; }
h1 span { background: none; padding: 0; }
h2, h3 { letter-spacing: -.5px; }
.resume-intro, .notebook-intro, .project-intro { padding: 36px 0 40px; }
.eyebrow { font-size: 10px; letter-spacing: 1px; color: var(--muted); }
.resume-intro .hero-bottom p, .hero-bottom p { font-size: 16px; line-height: 1.75; }
.primary-link { background: var(--strong-surface); color: var(--on-strong); border-radius: 4px; font-size: 13px; padding: 15px 20px; }
.primary-link:hover { background: var(--strong-hover); color: var(--on-strong); }
.section-heading { padding: 14px 0; border-bottom-color: var(--line); }
.section-heading h2 { font-size: 22px; }
.section-heading .eyebrow { color: var(--muted); }
.resume-row { grid-template-columns: 170px minmax(0, 1fr); gap: 34px; padding: 26px 0; }
.resume-row h3 { font-size: 21px; letter-spacing: -.4px; }
.entry-date { font: 12px/1.8 "Segoe UI", Arial, sans-serif; color: var(--muted); padding-top: 2px; }
.entry-detail { font: 12px/1.8 "Segoe UI", Arial, sans-serif; color: var(--muted); }
.resume-page .project-main p, .project-main p { font-size: 14px; line-height: 1.8; margin: 10px 0 12px; }
.project-meta span { color: var(--muted); }
.skill-tag, .project-skill-links a {
  background: var(--surface);
  color: var(--chip-ink);
  border-color: var(--line);
  border-radius: 3px;
  font-size: 10px;
  padding: 5px 8px;
}
.skill-tag:hover, .skill-tag.is-active, .project-skill-links a:hover {
  background: var(--hover-surface);
  border-color: var(--hover-border);
  color: var(--ink);
}
.tag, .featured .tag { background: var(--tag-surface); border-color: var(--tag-border); color: var(--accent); border-radius: 3px; }
.resume-page .project h3, .resume-page .project.featured h3,
.resume-page .side-project h3, .notebook-project h3 { font-size: 21px; }
.resume-page .side-project .project-main p { font-size: 14px; }
.project-links a:first-child, .text-link { text-decoration-color: var(--link-rule); }
.skills-panel { background: var(--surface); border-color: var(--line); border-radius: 4px; }
.skill-filter { color: var(--ink); background: var(--paper); border-color: var(--line); border-radius: 3px; }
.skill-filter:hover { border-color: var(--hover-border); }
.skill-filter[aria-pressed="true"] { background: var(--strong-surface); color: var(--on-strong); border-color: var(--strong-surface); }
.skill-filter[aria-pressed="true"] .skill-count { color: var(--on-strong); }
.contact-section h2 { font-size: 28px; }

.project-summary p { font-size: 17px; line-height: 1.75; }
.project-details { grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 56px; padding: 50px 0; }
.project-details h2 { font-size: 30px; line-height: 1.2; letter-spacing: -.8px; }
.project-copy p, .dev-entry-body p { line-height: 1.85; }
.project-documentation { padding-top: 48px; }
.project-jump-links a { border-color: var(--link-rule); }
.model-stage {
  background-color: var(--model-surface);
  background-image: linear-gradient(var(--model-grid) 1px, transparent 1px), linear-gradient(90deg, var(--model-grid) 1px, transparent 1px);
}
model-viewer { --progress-bar-color: var(--accent); --poster-color: transparent; }
.viewer-no-script { background: var(--surface); color: var(--ink); }
.viewer-reset:hover:not(:disabled) { background: var(--hover-surface); border-color: var(--hover-border); color: var(--ink); }
.hardware-table thead th { border-bottom-color: var(--line); }
.hardware-table td, .hardware-table caption { color: var(--muted); }
.hardware-table code { color: var(--ink); }
.dev-log { border-left-color: var(--timeline-rule); }
.dev-entry::before { background: var(--accent); border-color: var(--accent); }
.dev-entry-body h3 { font-size: 22px; }

@media (max-width: 760px) {
  .page { padding-inline: 24px; }
  h1 { font-size: clamp(38px, 8.5vw, 58px); letter-spacing: -1.5px; }
  .resume-intro, .notebook-intro, .project-intro { padding: 28px 0 32px; }
  .resume-row { grid-template-columns: 1fr; gap: 8px; padding: 25px 0; }
  .resume-row h3 { font-size: 21px; }
  .entry-date { padding-top: 0; }
  .header-actions { gap: 22px; }
  .project-details { grid-template-columns: 1fr; gap: 24px; padding: 40px 0; }
  .project-details h2 { font-size: 28px; }
  .dev-entry { grid-template-columns: 1fr; gap: 12px; }
  .dev-entry-meta { flex-direction: row; flex-wrap: wrap; gap: 8px 18px; }
}
@media (max-width: 620px) {
  .site-header { flex-direction: column; align-items: flex-start; gap: 12px; padding: 18px 0 12px; }
  .header-actions { width: 100%; justify-content: space-between; gap: 16px; }
  .site-header nav { width: auto; gap: 28px; }
}
@media (max-width: 360px) {
  .page { padding-inline: 20px; }
  .site-header nav { gap: 19px; font-size: 12px; }
  .contact-links { gap: 18px; }
}