/* BWH Labs newsletter archive — editorial: navy on warm cream, serif display,
   a thin frame around the email. The email keeps its own Klaviyo styling; this
   shell only supplies masthead, meta, and colophon. */

:root {
  --navy: #1b365d;
  --navy-deep: #142744;
  --cream: #f7f5f1;
  --paper: #efece5;
  --line: #e3dfd7;
  --ink: #1a2436;
  --muted: #5c6472;
  --accent: #c96f4a;
  --email-bg: #f5f5f7;
  --display: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--navy); }

/* ---- Masthead ---- */
.masthead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: clamp(1rem, 2vw, 1.6rem) clamp(1.1rem, 4vw, 2.4rem);
  background: var(--navy);
  color: var(--cream);
}
.wordmark {
  font-family: var(--display);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--cream);
  text-decoration: none;
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}
.wordmark span {
  font-family: var(--sans);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #a8c0e0;
}
.masthead .back {
  font-size: 0.82rem;
  color: #cdd8e8;
  text-decoration: none;
}
.masthead .back:hover { color: #fff; text-decoration: underline; }

/* ---- Main ---- */
main { max-width: 760px; margin: 0 auto; padding: clamp(1.6rem, 4vw, 3rem) 1.1rem 0; }

/* Issue meta (above the email) */
.issue-meta {
  border-bottom: 1px solid var(--line);
  padding-bottom: clamp(1.2rem, 3vw, 1.8rem);
  margin-bottom: clamp(1.4rem, 3vw, 2rem);
}
.issue-meta time {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 0.7rem;
}
.issue-meta h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.9rem, 5.5vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--navy-deep);
}
.issue-meta .dek {
  margin: 0.9rem 0 0;
  font-size: 1.06rem;
  color: var(--muted);
  max-width: 42ch;
}

/* The email itself sits on its native background, centered, gently lifted. */
.email-frame {
  background: var(--email-bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 1px 0 rgba(20, 39, 68, 0.04), 0 18px 40px -28px rgba(20, 39, 68, 0.35);
}
.email-frame img { max-width: 100%; height: auto; }

/* ---- Index ---- */
.lede { max-width: 640px; margin: 0 0 clamp(2rem, 5vw, 3.4rem); }
.lede h1 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  color: var(--navy-deep);
  margin: 0 0 1rem;
}
.lede p { font-size: 1.12rem; color: var(--muted); margin: 0; max-width: 52ch; }

.issues { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.issues li { border-bottom: 1px solid var(--line); }
.issues a {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  padding: clamp(1.3rem, 3vw, 1.9rem) 0.2rem;
  text-decoration: none;
  color: inherit;
  transition: background-color 160ms cubic-bezier(0.22, 1, 0.36, 1), padding-left 160ms cubic-bezier(0.22, 1, 0.36, 1);
}
.issues a:hover { background: var(--paper); padding-left: 0.9rem; }
.issues time {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}
.issues .title {
  font-family: var(--display);
  font-size: clamp(1.35rem, 3.5vw, 1.8rem);
  font-weight: 600;
  color: var(--navy-deep);
  line-height: 1.1;
}
.issues .dek { color: var(--muted); font-size: 0.98rem; max-width: 60ch; }

/* ---- Colophon ---- */
.colophon {
  max-width: 760px;
  margin: clamp(2.4rem, 6vw, 4rem) auto 0;
  padding: clamp(1.6rem, 4vw, 2.4rem) 1.1rem clamp(2.4rem, 6vw, 3.4rem);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.86rem;
}
.colophon p { margin: 0.2rem 0; }
.colophon a { color: var(--navy); text-decoration: none; }
.colophon a:hover { text-decoration: underline; }

/* ---- Signup ---- */
.signup-label {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.signup-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }

.signup-form { min-width: 0; }
.signup-row { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.signup-input {
  flex: 1 1 12rem;
  min-width: 0;
  font: inherit;
  font-size: 1rem;
  padding: 0.72rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}
.signup-input::placeholder { color: #6b7280; }
.signup-input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-color: var(--accent);
}
.signup-btn {
  font: inherit;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 0.72rem 1.4rem;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 160ms cubic-bezier(0.22, 1, 0.36, 1), transform 120ms cubic-bezier(0.22, 1, 0.36, 1);
}
.signup-btn:active { transform: translateY(1px); }
.signup-btn:disabled { cursor: default; opacity: 1; }
.signup-msg { margin: 0.6rem 0 0; font-size: 0.9rem; min-height: 1.2em; }
.signup-msg[data-state="ok"] { color: #2f6b3d; }
.signup-msg[data-state="err"] { color: #a3352f; }
.signup-fine { margin: 0.7rem 0 0; font-size: 0.82rem; color: var(--muted); }

/* Hero band (homepage) — navy panel */
.signup--hero {
  margin: clamp(2rem, 5vw, 3.4rem) 0;
  padding: clamp(1.8rem, 4vw, 2.8rem);
  background: var(--navy);
  border-radius: 14px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(1.4rem, 4vw, 2.6rem);
  align-items: center;
}
.signup--hero .eyebrow {
  margin: 0 0 0.6rem;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 700;
  color: #b9c9e2;
}
.signup--hero h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  line-height: 1.05;
  color: var(--cream);
  margin: 0 0 0.6rem;
}
.signup--hero .signup-copy p { color: #d7dfec; margin: 0; font-size: 1.02rem; max-width: 34ch; }
.signup--hero .signup-btn { background: var(--cream); color: var(--navy-deep); }
.signup--hero .signup-btn:hover { background: #fff; }
.signup--hero .signup-btn:focus-visible { outline: 2px solid #fff; outline-offset: 2px; }
.signup--hero .signup-fine { color: #aebbcf; }
.signup--hero .signup-msg[data-state="ok"] { color: #bfe3c8; }
.signup--hero .signup-msg[data-state="err"] { color: #f2b8b8; }
.signup--hero .signup-input:focus-visible { outline-color: #fff; border-color: #fff; }

/* Footer band (every page) — compact, on cream */
.signup--footer {
  max-width: 760px;
  margin: clamp(2.4rem, 6vw, 3.6rem) auto 0;
  padding: clamp(1.6rem, 4vw, 2.2rem) 1.1rem 0;
}
.signup--footer h2 {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  color: var(--navy-deep);
  margin: 0 0 0.9rem;
}
.signup--footer .signup-form { max-width: 30rem; }
.signup--footer .signup-btn { background: var(--navy); color: var(--cream); }
.signup--footer .signup-btn:hover { background: var(--navy-deep); }

@media (max-width: 620px) {
  .signup--hero { grid-template-columns: minmax(0, 1fr); }
  .signup-row { flex-direction: column; align-items: stretch; }
  .signup-input { flex: 0 0 auto; }
  .signup-btn { width: 100%; }
}
@media (max-width: 520px) {
  .masthead { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}