/* Ruth Linnea Whitney — Author site (2025)
   Clean, fast, accessible, no dependencies.
*/

:root{
  --bg: #0b0f1a;
  --panel: rgba(255,255,255,.06);
  --panel2: rgba(255,255,255,.09);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.70);
  --faint: rgba(255,255,255,.55);
  --border: rgba(255,255,255,.14);
  --accent: #a9c5ff;
  --accent2: #ffd9a6;
  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --radius: 18px;
  --radius2: 26px;
  --max: 1120px;
}

[data-theme="light"]{
  --bg: #f7f7fb;
  --panel: rgba(0,0,0,.045);
  --panel2: rgba(0,0,0,.07);
  --text: rgba(0,0,0,.88);
  --muted: rgba(0,0,0,.68);
  --faint: rgba(0,0,0,.55);
  --border: rgba(0,0,0,.12);
  --accent: #2e5dff;
  --accent2: #b85b00;
  --shadow: 0 18px 55px rgba(0,0,0,.14);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 500px at 20% -10%, rgba(169,197,255,.22), transparent 60%),
              radial-gradient(1000px 480px at 80% 0%, rgba(255,217,166,.16), transparent 55%),
              var(--bg);
  color: var(--text);
  line-height: 1.55;
}

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

.container{
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.skip-link{
  position:absolute;
  left:-9999px;
  top:auto;
  width:1px;
  height:1px;
  overflow:hidden;
}
.skip-link:focus{
  left:1rem;
  top:1rem;
  width:auto;
  height:auto;
  padding:.6rem .9rem;
  background: var(--panel2);
  border: 1px solid var(--border);
  border-radius: 12px;
  z-index: 9999;
}

/* Header */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:.85rem 0;
  gap: 1rem;
}

.brand{
  display:flex;
  align-items:center;
  gap:.75rem;
}
.brand-mark{
  width:40px; height:40px;
  display:grid; place-items:center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(169,197,255,.35), rgba(255,217,166,.28));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  font-weight: 700;
}
.brand-text{ display:flex; flex-direction:column; gap:.05rem; }
.brand-text span{ color: var(--muted); font-size: .9rem; }

/* Nav */
.nav{ display:flex; align-items:center; gap:.75rem; }
.nav-toggle{
  display:none;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 14px;
  padding: .55rem .8rem;
}
.nav-menu{
  display:flex;
  align-items:center;
  gap:.9rem;
}
.nav-link{
  color: var(--muted);
  padding: .35rem .25rem;
  border-bottom: 2px solid transparent;
}
.nav-link:hover{ color: var(--text); text-decoration:none; }
.nav-link.active{
  color: var(--text);
  border-bottom-color: color-mix(in srgb, var(--accent) 65%, transparent);
}
.theme-toggle{
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 14px;
  padding: .45rem .65rem;
  cursor:pointer;
}
.theme-toggle:hover{ background: var(--panel2); }

.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;
}

/* Hero */
.hero{
  padding: 3.25rem 0 1.5rem;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 1.5rem;
  align-items:start;
}
.kicker{
  color: var(--muted);
  letter-spacing: .08em;
  text-transform: uppercase;
  font-size: .78rem;
  margin: 0 0 .75rem;
}
h1{
  font-size: clamp(2.05rem, 4vw, 3.1rem);
  line-height: 1.12;
  margin: 0 0 1rem;
}
.lede{
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 64ch;
}

.cta-row{
  display:flex;
  gap:.8rem;
  flex-wrap:wrap;
  margin: 1.35rem 0 1.15rem;
}

.button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius: 999px;
  padding: .75rem 1rem;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  text-decoration:none;
  box-shadow: none;
}
.button:hover{
  background: var(--panel2);
  text-decoration:none;
}
.button.primary{
  background: linear-gradient(135deg,
    color-mix(in srgb, var(--accent) 45%, transparent),
    color-mix(in srgb, var(--accent2) 35%, transparent)
  );
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}
.button.subtle{
  background: transparent;
}

.hero-notes{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin-top: 1.1rem;
}
.note{
  padding: .85rem .9rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
}
.note-label{ display:block; color: var(--faint); font-size: .85rem; }
.note-value{ display:block; margin-top: .2rem; }

/* Cards and sections */
.section{
  padding: 2.2rem 0;
}
.section.alt{
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--panel) 55%, transparent));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head{
  display:flex;
  align-items:end;
  justify-content:space-between;
  gap:1rem;
  margin-bottom: 1.2rem;
}
.section-head h2{ margin:0; font-size: 1.55rem; }
.section-head p{ margin:0; color: var(--muted); }

.grid-3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.grid-2{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.split{
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 1rem;
  align-items:start;
}

.card{
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius2);
  padding: 1.15rem 1.15rem;
  box-shadow: var(--shadow);
}
.card h2, .card h3{ margin-top: 0; }
.card-top{ margin-bottom:.65rem; }
.card-title{ margin:0; color: var(--faint); font-size:.9rem; }
.card-sub{ margin:.35rem 0 0; color: var(--muted); }

.bullets{
  margin: .8rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.bullets li{ margin:.25rem 0; }

.card-actions{
  display:flex;
  gap:.75rem;
  flex-wrap:wrap;
  margin-top: 1rem;
}

.hero-card .mini-quote{
  margin-top: .9rem;
  padding: 1rem 1.1rem;
  border-radius: var(--radius2);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 75%, transparent);
}
.mini-quote p{ margin:0; }
.attribution{ margin-top:.55rem; color: var(--muted); font-size:.95rem; }

.quote-card{
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius2);
  padding: 1.1rem 1.1rem;
}
.quote{ margin:0; font-size: 1.02rem; }
.quote-by{ margin:.85rem 0 0; color: var(--muted); }

.section-actions{
  margin-top: 1.2rem;
  display:flex;
  gap:.8rem;
  flex-wrap:wrap;
}

.callout{
  border: 1px solid var(--border);
  background: linear-gradient(135deg, color-mix(in srgb, var(--panel2) 80%, transparent), var(--panel));
  border-radius: var(--radius2);
  padding: 1.15rem 1.15rem;
}
.callout h3, .callout h2{ margin-top:0; }

.info-row{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem;
  margin: 1rem 0 1rem;
}
.info{
  padding: .85rem .9rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 70%, transparent);
}
.note-value{ color: var(--text); }

.link-list{
  margin:.8rem 0 0;
  padding-left: 1.1rem;
}
.link-list li{ margin:.35rem 0; }
.link-list a{ text-decoration: underline; }

.facts{
  margin: .8rem 0 0;
  padding-left: 1.1rem;
  color: var(--muted);
}
.facts li{ margin:.45rem 0; }

.tiny{ font-size: .92rem; }
.muted{ color: var(--muted); }

/* Page hero */
.page-hero{
  padding: 2.7rem 0 1.1rem;
}
.page-hero h1{
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
}
.page-hero .lede{ margin-top: .4rem; }

/* Other writing list */
.works{
  list-style: none;
  padding: 0;
  margin: .85rem 0 0;
}
.works li{
  padding: .75rem .8rem;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel2) 70%, transparent);
  border-radius: 16px;
  margin-bottom: .7rem;
  color: var(--muted);
}
.works a{ color: var(--text); text-decoration: underline; }
.star{
  display:inline-block;
  width: 1.1rem;
  color: color-mix(in srgb, var(--accent2) 65%, var(--text));
  margin-right: .15rem;
}

/* Footer */
.site-footer{
  padding: 1.6rem 0 2rem;
  border-top: 1px solid var(--border);
  margin-top: 1.5rem;
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 1rem;
  flex-wrap:wrap;
}
.footer-inner p{ margin:0; }

/* Responsive */
@media (max-width: 900px){
  .hero-grid, .split, .grid-3, .grid-2{
    grid-template-columns: 1fr;
  }
  .section-head{
    align-items:start;
    flex-direction:column;
  }
}

@media (max-width: 760px){
  .nav-toggle{ display:inline-flex; cursor:pointer; }
  .nav-menu{
    position: absolute;
    right: 1rem;
    top: 64px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:.55rem;
    padding: .75rem;
    width: min(320px, calc(100vw - 2rem));
    border: 1px solid var(--border);
    border-radius: var(--radius2);
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    box-shadow: var(--shadow);
  }
  .nav-menu.open{ display:flex; }
  .nav-link{ padding:.55rem .4rem; }
}
/* Book cover block */
.book-split{
  grid-template-columns: .55fr 1fr; /* cover + content (and buy card stacks below on small screens) */
}

.cover img{
  width: 100%;
  height: auto;
  display: block;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

@media (min-width: 901px){
  /* On desktop, we want 3 columns: cover | description | buy */
  .book-split{
    grid-template-columns: .55fr 1fr .8fr;
  }
}