/* ==========================================================================
   MEM Website — Shared Stylesheet
   malcolmericmeadows.com
   --------------------------------------------------------------------------
   Contains: reset, design tokens, layout shell, header, nav, footer.
   Each page keeps its own page-specific layout styles in an inline <style>.
   Blog posts in /writing/ should reference this as ../style.css
   ========================================================================== */


/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}


/* --------------------------------------------------------------------------
   Design tokens
   -------------------------------------------------------------------------- */

:root {
  /* Backgrounds */
  --page-bg: #F5F5F7;
  --page-bg-alt: #FFFFFF;

  /* Type */
  --ink: #111827;
  --ink-soft: #4B5563;
  --ink-softer: #6B7280;

  /* Accent — blue */
  --accent: #1D4ED8;
  --accent-soft: #E0ECFF;
  --accent-muted: #93C5FD;

  /* Borders */
  --border-subtle: #E5E7EB;
  --border-strong: #D1D5DB;

  /* Panels */
  --panel-bg: #FFFFFF;
  --panel-tint: #F9FAFB;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-soft: 0 10px 25px rgba(15, 23, 42, 0.05);
  --shadow-medium: 0 18px 40px rgba(15, 23, 42, 0.08);

  /* Layout */
  --content-width: 1040px;
}


/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  line-height: 1.6;
  color: var(--ink);
  background: radial-gradient(circle at top, #E5E7EB 0, var(--page-bg) 50%);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}


/* --------------------------------------------------------------------------
   Page shell
   -------------------------------------------------------------------------- */

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

main {
  flex: 1;
}


/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */

header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(248, 250, 252, 0.9);
  border-bottom: 1px solid rgba(209, 213, 219, 0.8);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
  gap: 1.5rem;
}


/* --------------------------------------------------------------------------
   Brand
   -------------------------------------------------------------------------- */

.brand {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 40%;
  background: radial-gradient(circle at 30% 10%, #E5E7EB, #CBD5F5);
  border: 1px solid #D1D5DB;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--ink);
  flex-shrink: 0;
}

.brand-text-primary {
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 0.92rem;
  text-transform: uppercase;
  color: var(--ink);
}

.brand-text-secondary {
  font-size: 0.8rem;
  color: var(--ink-softer);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}


/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */

nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.nav-link {
  position: relative;
  padding: 0.25rem 0;
  cursor: pointer;
  transition: color 0.15s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -0.1rem;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform-origin: center;
  transform: scaleX(0);
  transition: transform 0.15s ease;
}

.nav-link:hover {
  color: var(--ink);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

/* Active state — add class="nav-link nav-active" on the current page's link */
.nav-link.nav-active {
  color: var(--ink);
}

.nav-link.nav-active::after {
  transform: scaleX(1);
}

.nav-cta {
  border-radius: var(--radius-pill);
  border: 1px solid var(--accent-muted);
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #FFFFFF;
  background: var(--accent);
  box-shadow: var(--shadow-medium);
  cursor: pointer;
  font-family: inherit;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.nav-cta:hover {
  transform: translateY(-1px);
  background: #153EAA;
  box-shadow: 0 22px 45px rgba(15, 23, 42, 0.18);
}

.nav-mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--ink);
  cursor: pointer;
  font-size: 1.2rem;
}


/* --------------------------------------------------------------------------
   Shared typographic utilities
   -------------------------------------------------------------------------- */

.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--ink-softer);
}

.section-kicker {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.78rem;
  color: var(--ink-softer);
}


/* --------------------------------------------------------------------------
   Shared button styles (used on index; available to all pages)
   -------------------------------------------------------------------------- */

.btn-primary {
  border-radius: var(--radius-pill);
  border: 1px solid var(--accent-muted);
  padding: 0.6rem 1.35rem;
  font-size: 0.92rem;
  font-weight: 500;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: #FFFFFF;
  background: var(--accent);
  box-shadow: var(--shadow-medium);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  background: #153EAA;
  box-shadow: 0 22px 50px rgba(15, 23, 42, 0.2);
}

.btn-secondary {
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ink-soft);
  background: var(--page-bg-alt);
  box-shadow: var(--shadow-soft);
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease, background 0.12s ease;
}

.btn-secondary:hover {
  transform: translateY(-1px);
  border-color: var(--accent-muted);
  background: #F9FAFB;
  box-shadow: var(--shadow-medium);
}

.btn-icon {
  font-size: 0.9rem;
}


/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

footer {
  border-top: 1px solid rgba(209, 213, 219, 0.9);
  padding: 1.2rem 0 1.4rem;
  margin-top: 2.2rem;
  font-size: 0.8rem;
  color: var(--ink-softer);
  background: rgba(248, 250, 252, 0.9);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  flex-wrap: wrap;
  align-items: center;
}

.footer-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--ink-softer);
  font-size: 0.8rem;
}

.footer-links a:hover {
  color: var(--ink-soft);
}


/* --------------------------------------------------------------------------
   Responsive — mobile nav
   -------------------------------------------------------------------------- */

@media (max-width: 720px) {
  .nav-mobile-toggle {
    display: block;
  }

  nav {
    display: none;
  }

  nav.nav-open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.6rem 0 0.4rem;
  }
}