/* Design system derived from DESIGN.md (Apple-inspired analysis) */

:root {
  --primary: #0066cc;
  --primary-focus: #0071e3;
  --primary-on-dark: #2997ff;
  --ink: #1d1d1f;
  --on-dark: #ffffff;
  --body-muted: #cccccc;
  --ink-muted-80: #333333;
  --ink-muted-48: #7a7a7a;
  --divider-soft: #f0f0f0;
  --hairline: #e0e0e0;
  --canvas: #ffffff;
  --canvas-parchment: #f5f5f7;
  --surface-pearl: #fafafc;
  --surface-tile-1: #272729;
  --surface-tile-2: #2a2a2c;
  --surface-black: #000000;
  --on-primary: #ffffff;

  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 11px;
  --radius-lg: 18px;
  --radius-pill: 9999px;

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 17px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 80px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 60px; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-feature-settings: "ss03";
  font-weight: 400;
  font-size: 17px;
  line-height: 1.44;
  letter-spacing: -0.374px;
  margin: 0;
}

.container { max-width: 61.25rem; } /* ~980px */

/* Typography tokens */
.hero-display, .display-lg, .display-md, .tagline, .body-strong {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  font-feature-settings: "ss03";
  margin: 0;
}
.hero-display { font-size: 56px; font-weight: 600; line-height: 1.07; letter-spacing: -0.29px; }
.display-lg   { font-size: 40px; font-weight: 600; line-height: 1.1;  letter-spacing: -0.01em; }
.display-md   { font-size: 34px; font-weight: 600; line-height: 1.2;  letter-spacing: -0.384px; }
.lead         { font-size: 28px; font-weight: 400; line-height: 1.14; letter-spacing: 0.196px; }
.tagline      { font-size: 21px; font-weight: 600; line-height: 1.19; letter-spacing: 0.231px; }
.body-strong  { font-size: 17px; font-weight: 600; line-height: 1.24; letter-spacing: -0.384px; }
.body-lg      { font-size: 17px; font-weight: 400; line-height: 1.44; letter-spacing: -0.384px; }
.dense-link   { font-size: 17px; font-weight: 400; line-height: 2.41; letter-spacing: 0; }
.caption      { font-size: 14px; font-weight: 400; line-height: 1.43; letter-spacing: -0.224px; }
.caption-strong { font-size: 14px; font-weight: 600; line-height: 1.29; letter-spacing: -0.224px; }
.fine-print   { font-size: 12px; font-weight: 400; line-height: 1.0;  letter-spacing: -0.12px; }
.nav-link     { font-size: 12px; font-weight: 400; line-height: 1.0;  letter-spacing: -0.12px; }

@media (max-width: 1068px) {
  .hero-display { font-size: 40px; }
}
@media (max-width: 640px) {
  .hero-display { font-size: 34px; }
  .display-lg { font-size: 30px; }
}
@media (max-width: 419px) {
  .hero-display { font-size: 28px; }
}

.text-muted { color: var(--ink-muted-48); }
.on-dark .text-muted, .text-muted-on-dark { color: var(--body-muted); }

/* Global nav — the one place true black appears */
.global-nav {
  background: var(--surface-black);
  color: var(--on-dark);
  position: relative;
}
.global-nav a { color: var(--on-dark); text-decoration: none; }
.global-nav a:hover { color: var(--primary-on-dark); }

/* Mobile nav toggle + panel */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 32px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: var(--radius-sm);
  color: var(--on-dark);
  cursor: pointer;
  padding: 0;
}
.nav-toggle svg { width: 18px; height: 18px; display: block; pointer-events: none; }
@media (max-width: 639px) {
  .nav-toggle { display: inline-flex; }
}

.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--surface-black);
  border-top: 1px solid rgba(255,255,255,0.12);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 14px 24px;
  font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.mobile-menu a:last-child { border-bottom: none; }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: var(--on-primary);
  border: 1px solid var(--primary);
  border-radius: var(--radius-pill);
  padding: 11px 22px;
  font-size: 17px;
  text-decoration: none;
  transition: transform .1s ease, background-color .15s ease;
}
.btn-primary:hover { background: var(--primary-focus); border-color: var(--primary-focus); }
.btn-primary:active { transform: scale(0.95); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: var(--radius-pill);
  padding: 10px 21px;
  font-size: 17px;
  text-decoration: none;
  transition: transform .1s ease, background-color .15s ease;
}
.btn-secondary:hover { background: rgba(0,102,204,0.06); }
.btn-secondary:active { transform: scale(0.95); }

.btn-secondary-on-dark {
  color: var(--primary-on-dark);
  border-color: var(--primary-on-dark);
}
.btn-secondary-on-dark:hover { background: rgba(41,151,255,0.1); }

/* Tiles — full-bleed alternating sections, the section divider IS the color change */
.tile-light { background: var(--canvas); color: var(--ink); }
.tile-parchment { background: var(--canvas-parchment); color: var(--ink); }
.tile-dark { background: var(--surface-tile-1); color: var(--on-dark); }
.tile-dark-2 { background: var(--surface-tile-2); color: var(--on-dark); }

.tile-pad { padding: var(--space-section) 0; }
@media (max-width: 833px) { .tile-pad { padding: 56px 0; } }
@media (max-width: 419px) { .tile-pad { padding: 48px 0; } }

/* Store-style utility cards */
.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.card-on-dark {
  background: var(--surface-tile-2);
  border: 1px solid rgba(255,255,255,0.12);
}

.hairline-top { border-top: 1px solid var(--hairline); }
.hairline-divide > * + * { border-top: 1px solid var(--hairline); }
.hairline-divide-on-dark > * + * { border-top: 1px solid rgba(255,255,255,0.12); }

/* Configurator-style option chip — used here for skill tags */
.chip {
  display: inline-block;
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-pill);
  padding: 6px 14px;
}
.chip-on-dark {
  background: var(--surface-tile-2);
  border-color: rgba(255,255,255,0.16);
  color: var(--on-dark);
}

/* Forms */
.field {
  background: var(--canvas);
  color: var(--ink);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: inherit;
  font-size: 17px;
}
.field::placeholder { color: var(--ink-muted-48); }

/* Footer */
.footer {
  background: var(--canvas-parchment);
  color: var(--ink-muted-80);
}

.headshot {
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 3px 5px 30px rgba(0,0,0,0.22);
}

/* Motion */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
.tile-card { transition: transform .15s ease; }
.tile-card:hover { transform: translateY(-2px); }

:focus-visible {
  outline: 2px solid var(--primary-focus);
  outline-offset: 2px;
  border-radius: var(--radius-xs);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.focus\:not-sr-only:focus {
  position: static; width: auto; height: auto; margin: 0; overflow: visible;
  clip: auto; white-space: normal;
}