/* mandy chen portfolio: shared styles. keep this file beside the eight html pages. page-specific layouts remain in each page's <style> block. :where() keeps page variants easy to override without increasing specificity. */

/* design tokens */
:root {
  --bg: #f5f4f1;
  --surface: #eeecea;
  --surface2: #e7e5e2;
  --text: #1a1a18;
  --muted: #7a7870;
  --accent: #3d6b2f;
  --border: rgba(0,0,0,0.08);
  --font-display: "DM Serif Display", serif;
  --font-body: "DM Sans", sans-serif;
  --font-mono: "DM Mono", monospace;
}

/* reset and base typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}

/* navigation */
nav {
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}
:where(body:not(.page-about)) nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 1.25rem 2.5rem;
  background: rgba(245,244,241,0.85);
  backdrop-filter: blur(12px);
}
/* about keeps its in-flow navigation and content-driven scrolling layout. */
:where(body.page-about) nav {
  flex-shrink: 0;
  min-height: var(--nav-h);
  padding: 0 2.5rem;
  background: var(--bg);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}
.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--muted);
}
:where(body.page-about) .nav-links {
  font-size: 0.85rem;
}
.nav-links a:hover {
  color: var(--text);
  transition: color 0.2s;
}
.nav-links a.active {
  color: var(--text);
}

/* footer: shared appearance, with explicit page-width variants */
footer {
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
:where(body:not(.page-about)) footer {
  width: calc(100% - 5rem);
  max-width: 1120px;
  margin: 0 auto 4rem;
  padding: 2rem 0 0;
  align-items: flex-start;
  gap: 2rem;
}
:where(body.page-home) footer {
  width: calc(100% - 3rem);
  max-width: 1352px;
  margin: 6rem auto 4rem;
}
:where(body.page-about) footer {
  flex-shrink: 0;
  min-height: var(--footer-h);
  max-width: 1352px;
  width: calc(100% - 3rem);
  margin: 0 auto;
  padding: 0;
  align-items: center;
  gap: 1rem;
}
.footer-left p {
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 300;
}
.footer-left p:first-child {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--text);
  margin-bottom: 0.25rem;
}
:where(body.page-about) .footer-left p:first-child {
  margin-bottom: 0.1rem;
}
.footer-links {
  display: flex;
}
:where(body:not(.page-about)) .footer-links {
  flex-direction: column;
  gap: 0.4rem;
}
:where(body.page-about) .footer-links {
  gap: 1.5rem;
}
.footer-links a {
  color: var(--muted);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  font-size: 0.72rem;
  text-transform: uppercase;
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--accent);
}
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  font-size: 0.8rem;
}
.footer-nav a {
  color: var(--muted);
  transition: color 0.2s;
}
.footer-nav a:hover {
  color: var(--text);
}

/* preserve the existing page-specific responsive behavior. */
@media (max-width: 768px) {
  :where(body.page-about) nav { padding: 1rem 1.25rem; }
  :where(body.page-about) .nav-links {
    display: flex;
    gap: 1.25rem;
    font-size: 0.8rem;
  }
  :where(body.page-about) footer {
    height: auto;
    padding: 1.5rem 0;
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 760px) {
  :where(body:not(.page-about)) nav { padding: 0.9rem 1.25rem; }
  :where(body:not(.page-about)) .nav-links {
    display: flex;
    gap: 1.25rem;
    font-size: 0.8rem;
  }
  :where(body.page-home, body.page-about) footer {
    width: calc(100% - 2.5rem);
  }
}
@media (max-width: 640px) {
  :where(body.page-project) footer { width: calc(100% - 2.5rem); }
}