/* ==========================================================================
   Alessandro Sontuoso — site stylesheet
   Editorial academic, warm paper, classical serif.
   ========================================================================== */

/* --- Custom properties ------------------------------------------------- */
:root {
  /* Color */
  --paper:      #f7f3ec;
  --paper-soft: #efe8d8;
  --ink:        #1f1b16;
  --ink-soft:   #4a443c;
  --ink-mute:   #7a7264;
  --rule:       #d6cdb6;
  --rule-soft:  #e8e0c9;
  --accent:     #6b4423;   /* warm umber — successor to old #965 */
  --accent-2:   #b07d52;

  /* Type */
  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body:    "Newsreader", "Iowan Old Style", Georgia, serif;
  --font-ui:      "Fraunces", Georgia, serif;

  /* Sizing */
  --measure:    65ch;
  --container:  1120px;
  --gutter:     clamp(1.25rem, 4vw, 2.5rem);
}

/* --- Reset ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
img, picture, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; }

/* --- Base -------------------------------------------------------------- */
html {
  background: var(--paper);
}
body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "kern", "liga";
  font-variant-numeric: oldstyle-nums;
}

::selection { background: var(--accent); color: var(--paper); }

/* Subtle paper texture using a tiny radial gradient noise */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(31,27,22,0.025) 1px, transparent 1px);
  background-size: 3px 3px;
  z-index: -1;
}

/* --- Layout ------------------------------------------------------------ */
.shell {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* --- Site header ------------------------------------------------------- */
.site-header {
  padding-top: clamp(1.75rem, 4vw, 2.75rem);
  padding-bottom: 1rem;
}

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1.25rem 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  text-decoration: none;
  display: inline-flex;
  flex-direction: column;
  line-height: 0.95;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.4rem, 6vw, 3.5rem);
  font-variation-settings: "opsz" 144, "SOFT" 30;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.brand-name .surname {
  display: block;
  color: var(--accent-2);
  font-style: italic;
  font-weight: 300;
}

.tagline {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--ink-soft);
  font-feature-settings: "kern", "liga";
  letter-spacing: 0.01em;
  line-height: 1.55;
  max-width: 22ch;
}

/* --- Navigation -------------------------------------------------------- */
.site-nav {
  margin-top: 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.75rem;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 500;
}

.site-nav a {
  position: relative;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.35rem 0;
  transition: color 180ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 220ms ease;
}

.site-nav a:hover { color: var(--accent); }
.site-nav a:hover::after { transform: scaleX(1); }

.site-nav a[aria-current="page"] {
  color: var(--accent);
}
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

/* --- Page layout ------------------------------------------------------- */
.page {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
  padding-top: clamp(2rem, 5vw, 3.5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

@media (min-width: 880px) {
  .page.has-aside {
    grid-template-columns: minmax(0, 1fr) 240px;
  }
}

.page-content {
  max-width: var(--measure);
}

.page-content > * + * { margin-top: 1.1em; }
.page-content > h2 + *,
.page-content > h3 + * { margin-top: 0.6em; }

.page-content h1,
.page-content h2,
.page-content h3 {
  font-family: var(--font-display);
  color: var(--ink);
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.2;
}

.page-content h1 {
  font-size: clamp(2rem, 4.5vw, 2.6rem);
  margin-bottom: 0.5rem;
  font-variation-settings: "opsz" 96, "SOFT" 50;
}

.page-content h2 {
  font-size: clamp(1.45rem, 3vw, 1.75rem);
  margin-top: 2.25em;
}

.page-content h3 {
  font-size: 1.2rem;
  margin-top: 2em;
  color: var(--accent);
}

.page-content p { line-height: 1.7; }
.page-content em { font-style: italic; }
.page-content strong { font-weight: 600; color: var(--ink); }

.page-content a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-2);
  text-decoration-thickness: 0.5px;
  text-underline-offset: 3px;
  transition: color 150ms ease, text-decoration-color 150ms ease;
}
.page-content a:hover {
  color: var(--ink);
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
}

.page-content ul, .page-content ol {
  padding-left: 1.25em;
}
.page-content li + li { margin-top: 0.4em; }

/* --- Section divider --------------------------------------------------- */
.divider {
  border: 0;
  height: 1px;
  background: var(--rule);
  margin: 2.5em 0;
  position: relative;
}
.divider::after {
  content: "❦";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--paper);
  padding: 0 0.6em;
  color: var(--accent-2);
  font-size: 0.95rem;
}

/* --- Pull quote -------------------------------------------------------- */
.pull-quote {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  line-height: 1.4;
  color: var(--ink-soft);
  border-left: 2px solid var(--accent);
  padding-left: 1.25rem;
  margin: 0;
}
.pull-quote cite {
  display: block;
  font-style: normal;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 0.6rem;
}

/* --- Research entries -------------------------------------------------- */
.entry {
  margin: 0;
  padding: 1.6em 0;
  border-top: 1px solid var(--rule-soft);
}
.entry:first-of-type { border-top: 0; padding-top: 0; }

.entry-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ink);
  line-height: 1.35;
  margin: 0 0 0.35em;
}
.entry-title a {
  color: var(--ink);
  text-decoration: none;
  background-image: linear-gradient(var(--accent-2), var(--accent-2));
  background-size: 100% 1px;
  background-repeat: no-repeat;
  background-position: 0 100%;
  padding-bottom: 1px;
  transition: color 150ms ease, background-size 200ms ease;
}
.entry-title a:hover {
  color: var(--accent);
  background-size: 100% 2px;
}

.entry-meta {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--ink-mute);
  margin: 0 0 0.75em;
}

.entry-abstract {
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

.see-also {
  margin-top: 0.7em;
  padding-left: 0.9em;
  border-left: 2px solid var(--rule);
  font-size: 0.92rem;
  font-style: italic;
  color: var(--ink-mute);
  line-height: 1.55;
}
.see-also em { font-style: normal; }
.see-also a {
  font-style: normal;
  color: var(--accent);
  text-decoration: underline;
  text-decoration-color: var(--accent-2);
  text-underline-offset: 2px;
}

.wip-list {
  list-style: none;
  padding-left: 0;
  margin-top: 1rem;
}
.wip-list li {
  padding: 0.5em 0;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 0.98rem;
  color: var(--ink-soft);
}
.wip-list li:last-child { border-bottom: 0; }

/* --- Teaching entries -------------------------------------------------- */
.course {
  padding: 1.4em 0;
  border-top: 1px solid var(--rule-soft);
}
.course:first-of-type { border-top: 0; padding-top: 0; }
.course-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--ink);
  margin-bottom: 0.4em;
}
.course-title .code {
  font-variant-numeric: lining-nums;
  color: var(--accent);
  font-weight: 500;
  margin-right: 0.5em;
}
.course p {
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --- Aside (sidebar artwork) ------------------------------------------- */
.page-aside {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--ink-mute);
  line-height: 1.5;
}
.page-aside figure { margin: 0; }
.page-aside img {
  width: 100%;
  border: 1px solid var(--rule);
  background: #fff;
  padding: 6px;
}
.page-aside figcaption {
  margin-top: 0.7em;
  text-align: center;
  letter-spacing: 0.01em;
}
.page-aside figcaption em {
  font-style: italic;
  color: var(--ink-soft);
}

@media (max-width: 879px) {
  .page-aside {
    display: none;
  }
}

/* --- Hero image (home) ------------------------------------------------- */
.hero {
  margin: 0;
  text-align: center;
}
.hero img {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
  border: 1px solid var(--rule);
  background: #fff;
  padding: 10px;
}
.hero figcaption {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.88rem;
  color: var(--ink-mute);
  margin-top: 1rem;
  letter-spacing: 0.01em;
}

/* --- Contact form ----------------------------------------------------- */
.contact-form {
  margin-top: 2rem;
  max-width: 560px;
}
.contact-form .field {
  margin-bottom: 1.5rem;
}
.contact-form label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--ink-soft);
  margin-bottom: 0.45rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.7rem 0.9rem;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 0;
  transition: border-color 150ms ease, background 150ms ease;
  -webkit-appearance: none;
  appearance: none;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}
.contact-form textarea {
  resize: vertical;
  min-height: 160px;
  line-height: 1.6;
  font-family: var(--font-body);
}
.contact-form button {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.85rem 1.9rem;
  background: var(--accent);
  color: var(--paper);
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: background 200ms ease, border-color 200ms ease, transform 100ms ease;
  margin-top: 0.5rem;
}
.contact-form button:hover {
  background: var(--ink);
  border-color: var(--ink);
}
.contact-form button:active {
  transform: translateY(1px);
}

.form-success {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-style: italic;
  color: var(--ink-soft);
  padding: 1rem 1.25rem;
  border-left: 2px solid var(--accent);
  margin-top: 1rem;
}

/* --- Footer ------------------------------------------------------------ */
.site-footer {
  border-top: 1px solid var(--rule);
  padding-top: 1.75rem;
  padding-bottom: 2.5rem;
  margin-top: 1rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: center;
  margin-bottom: 0.75rem;
}
.footer-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.78rem;
  transition: color 150ms ease;
}
.footer-nav a:hover { color: var(--accent); }
.credit {
  text-align: center;
  font-style: italic;
  color: var(--ink-mute);
  font-size: 0.78rem;
}

/* --- Mobile fine-tuning ------------------------------------------------ */
@media (max-width: 540px) {
  .masthead { gap: 1rem; }
  .tagline { font-size: 0.85rem; }
  .site-nav { gap: 0.25rem 1.25rem; font-size: 0.85rem; }
  .footer-nav { gap: 0.4rem 0.9rem; }
}