/* Shared by the inner pages (blog, account, reader). Same tokens and base styles as index.html. */
:root {
  --page: #f5f7fa;
  --alt: #eaeef4;
  --card: #ffffff;
  --line: #dde3ec;
  --line-strong: #c9d2df;
  --text: #0f1b33;
  --text-2: #46526a;
  --muted: #66718a;

  --ink: #0b1e3d;
  --on-dark: #eef2f8;
  --on-dark-2: #a9b4c8;
  --dark-line: rgba(238, 242, 248, .12);

  --primary: #d51719;
  --primary-hover: #b81214;
  --accent: #3b82e0;
  --accent-2: #6aa5ee;
  --dot: #d51719;

  --display: "Fraunces", Georgia, serif;
  --body: "Instrument Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;

  --shadow-xs: 0 1px 2px rgba(11, 30, 61, .05);
  --shadow-md: 0 12px 32px -16px rgba(11, 30, 61, .18);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1120px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--body); font-size: 16px; line-height: 1.6; background: var(--page); color: var(--text); -webkit-font-smoothing: antialiased; }
h1, h2, h3 { font-family: var(--display); font-weight: 500; line-height: 1.12; letter-spacing: -.015em; }
a { color: inherit; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 32px; }
section { padding: 96px 0; }
.center { text-align: center; }
.eyebrow { font: 600 12px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--primary); margin-bottom: 12px; }
h2 { font-size: 44px; margin-bottom: 20px; }
.intro { color: var(--text-2); font-size: 18px; max-width: 36em; }
.small { font-size: 13px; color: var(--muted); margin-top: 16px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 52px; padding: 0 28px; border-radius: 8px; border: 1px solid transparent;
  font: 600 16px/1 var(--body); text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color 150ms var(--ease), border-color 150ms var(--ease), transform 120ms var(--ease);
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .6; cursor: progress; }
.btn:focus-visible, a:focus-visible, input:focus-visible, button:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-light { background: var(--card); color: var(--text); border-color: var(--line-strong); }
.btn-light:hover { background: var(--alt); }

nav.top { position: sticky; top: 0; z-index: 10; background: rgba(245, 247, 250, .92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
nav.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 12px; text-decoration: none; flex: none; }
.logo .mark { position: relative; width: 34px; height: 34px; border-radius: 8px; background: var(--ink); display: grid; place-items: center; flex: none; font: 700 14px/1 var(--display); letter-spacing: -.02em; color: #fff; }
.logo .mark::after { content: ""; position: absolute; top: 4px; right: 4px; width: 6px; height: 6px; border-radius: 50%; background: var(--dot, #d51719); } /* the cover's red dot */
.logo b { display: block; font: 600 17px/1.1 var(--display); letter-spacing: -.01em; white-space: nowrap; }
.logo small { display: block; font-size: 12px; color: var(--muted); margin-top: 2px; white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 24px; font-size: 15px; font-weight: 500; white-space: nowrap; }
.nav-links .menu-only { display: none; } /* listed in the phone menu only */
/* keep the header on one line as the window narrows: drop the subtitle, then the extra links */
@media (max-width: 1280px) { .logo small { display: none; } .nav-links { gap: 20px; } }
@media (max-width: 1180px) { .nav-links .wide { display: none; } }
@media (max-width: 1040px) { .nav-links { gap: 16px; font-size: 14px; } .nav-links .mid { display: none; } }
.nav-links a:not(.btn) { text-decoration: none; color: var(--text-2); transition: color 150ms var(--ease); }
.nav-links a:not(.btn):hover, .nav-links a[aria-current] { color: var(--text); }
.nav-links .btn { height: 44px; padding: 0 22px; font-size: 15px; }

/* Page header with a soft blue glow */
.page-head {
  padding: 88px 0 64px; border-bottom: 1px solid var(--line);
  background:
    radial-gradient(40rem 22rem at 78% -20%, rgba(59, 130, 224, .24), transparent 68%),
    radial-gradient(28rem 18rem at 6% 0%, rgba(59, 130, 224, .08), transparent 70%),
    var(--page);
}
.page-head h1 { font-size: 60px; letter-spacing: -.035em; line-height: 1.04; margin-bottom: 20px; }
.page-head h1 em { font-style: normal; color: var(--primary); }

/* Form fields */
.field { display: grid; gap: 6px; font-size: 14px; font-weight: 600; }
.field input { width: 100%; min-width: 0; height: 48px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--line-strong); background: var(--page); color: var(--text); font: 400 15px var(--body); }
.field input:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 1px; }
.field small { font-weight: 400; color: var(--muted); }
.error { font-size: 14px; color: #b91c1c; background: #fef2f2; border: 1px solid #fecaca; border-radius: 8px; padding: 10px 14px; }
.notice { font-size: 14px; color: var(--text-2); background: var(--alt); border: 1px solid var(--line-strong); border-radius: 8px; padding: 10px 14px; }

footer { background: var(--alt); border-top: 1px solid var(--line); padding: 40px 0; font-size: 13px; color: var(--muted); }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
footer nav { display: flex; flex-wrap: wrap; gap: 8px 24px; }
footer a { text-decoration: none; color: var(--text-2); transition: color 150ms var(--ease); }
footer a:hover { color: var(--primary); }

@media (max-width: 900px) {
  section { padding: 72px 0; }
  h2 { font-size: 34px; }
  .page-head { padding: 64px 0 48px; }
  .page-head h1 { font-size: 44px; }
  .nav-links a:not(.btn):not([aria-current]):not(.keep) { display: none; }
  .logo small { display: none; }
}
@media (max-width: 520px) {
  .wrap { padding: 0 16px; }
  .page-head h1 { font-size: 38px; }
  .nav-links { gap: 16px; }
  .logo b { font-size: 15px; }
  .nav-links .btn { height: 40px; padding: 0 16px; font-size: 14px; }
  /* no room beside the name and Menu: the button moves into the open menu (the hero has its own) */
  .nav-links:not(.open) { display: none; }

}

/* Phone menu for the static pages (toggled by auth.js). The React app has its own in app.css. */
.menu-btn { display: none; align-items: center; height: 40px; padding: 0 14px; margin: 0 10px 0 auto; border-radius: 8px; border: 1px solid var(--line-strong); background: var(--card); color: var(--text); font: 600 14px var(--body); cursor: pointer; }
@media (max-width: 900px) {
  nav.top .wrap { position: relative; }
  .menu-btn { display: inline-flex; }
  .nav-links a[aria-current]:not(.btn) { display: none; }
  .nav-links.open {
    position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 16px 16px; background: var(--page); border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md);
  }
  .nav-links.open a:not(.btn) { display: block !important; padding: 14px 4px; border-bottom: 1px solid var(--line); font-size: 16px; color: var(--text); }
  .nav-links.open .btn { margin-top: 12px; height: 48px; }
}
@media (max-width: 520px) { .menu-btn { margin-right: 0; } }