/* "Why a blog, now": a letter on paper. Warm paper background, a serif set
   from the system (no font download), a wide measure, a drop cap and one
   inline diagram. Everything shared with the other posts is in ../blog.css. */

.letter {
  --paper: #f7f1e6;
  --paper-deep: #efe5d3;
  --ink: #26221c;
  --ink-soft: #5a5348;
  --rule: rgba(38, 34, 28, 0.18);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Charter, Georgia, "Times New Roman", serif;
  background: var(--paper);
  background-image: linear-gradient(180deg, var(--paper-deep) 0, var(--paper) 220px);
  color: var(--ink);
}

.letter .topbar {
  max-width: 760px;
}

.post {
  max-width: 680px;
  margin: 0 auto;
  padding: var(--sp-xl) var(--sp-md) var(--sp-lg);
  font-family: var(--serif);
}

.post-header {
  padding-bottom: var(--sp-lg);
  margin-bottom: var(--sp-lg);
  border-bottom: 1px solid var(--rule);
}

.post-kicker {
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.post h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: var(--sp-xs) 0 var(--sp-sm);
}

.post-standfirst {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--ink-soft);
  font-style: italic;
}

.post .post-byline {
  margin-top: var(--sp-md);
  font-family: var(--font);
  color: var(--ink-soft);
}

.post h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 1.6rem;
  color: var(--ink);
  margin: var(--sp-lg) 0 var(--sp-sm);
}

.post p {
  font-size: 1.12rem;
  line-height: 1.7;
  color: var(--ink);
}

.post p + p {
  margin-top: 1em;
}

.post p a {
  color: var(--accent-secondary);
  background-image: linear-gradient(var(--accent), var(--accent));
}

.drop-cap::first-letter {
  float: left;
  font-size: 3.6em;
  line-height: 0.8;
  padding: 0.08em 0.1em 0 0;
  color: var(--accent);
  font-weight: 500;
}

/* === The then/now diagram === */
.then-now {
  margin: var(--sp-xl) calc(-1 * var(--sp-sm)) var(--sp-lg);
  padding: var(--sp-md) var(--sp-sm) var(--sp-sm);
  background: white;
  border: 1px solid var(--rule);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.then-now svg {
  width: 100%;
  height: auto;
  display: block;
  font-family: var(--font);
}

.then-now figcaption {
  margin-top: var(--sp-sm);
  text-align: center;
  font-family: var(--font);
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.then-now .panel-title {
  font-size: 20px;
  font-weight: 700;
  fill: var(--ink);
}

.then-now .panel-sub,
.then-now .caption {
  font-size: 12px;
  fill: var(--ink-soft);
}

.then-now .pages rect {
  fill: #e7e0d2;
  stroke: var(--rule);
}

.then-now .page-good {
  fill: var(--accent) !important;
  stroke: var(--accent) !important;
}

.then-now .funnel {
  fill: #ddd4c2;
  stroke: var(--rule);
}

.then-now .funnel-label {
  font-size: 12px;
  font-weight: 600;
  fill: var(--ink);
}

.then-now .results rect {
  fill: #cfc6b3;
}

.then-now .divider {
  stroke: var(--rule);
  stroke-dasharray: 4 6;
}

.then-now .model {
  fill: var(--accent-secondary);
}

.then-now .model-label {
  fill: white;
}

.then-now .threads path {
  fill: none;
  stroke: #b9ae97;
  stroke-width: 1.5;
}

.then-now .thread-good {
  stroke: var(--accent) !important;
  stroke-width: 2.5 !important;
}

.then-now .questions circle {
  fill: white;
  stroke: #b9ae97;
  stroke-width: 1.5;
}

.then-now .question-good {
  fill: var(--accent) !important;
  stroke: var(--accent) !important;
}

/* === Closing === */
.post-footer {
  margin-top: var(--sp-xl);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--rule);
}

.post-footer p {
  font-style: italic;
  color: var(--ink-soft);
}

.letter .page-footer {
  font-family: var(--font);
  color: var(--ink-soft);
}

@media (max-width: 600px) {
  .post-standfirst {
    font-size: 1.1rem;
  }
  .post p {
    font-size: 1.05rem;
  }
  .then-now {
    margin-left: 0;
    margin-right: 0;
  }
}