/* ==========================================================================
   mehmetyalcinaydin.com — site styles
   Colours and type carried over from the original WordPress site
   (Lyrical theme + customizer settings, 2019–2020).
   ========================================================================== */

:root {
  /* Header */
  --header-brown: #9e5524;
  --header-overlay: rgba(158, 85, 36, 0.41);
  --nav-teal: #1985a1;
  --nav-teal-hover: rgba(25, 133, 161, 0.8);

  /* Accents */
  --accent-teal: #21cfb7;
  --link: #4c99ba;
  --link-hover: rgba(76, 153, 186, 0.8);

  /* Text */
  --heading: #353535;
  --text: #252525;
  --muted: #686868;

  /* Surfaces */
  --page-bg: #f5f5f5;
  --card-bg: #ffffff;
  --rule: rgba(37, 37, 37, 0.1);
  --tint: rgba(37, 37, 37, 0.04);

  /* Footer */
  --footer-bg: #141414;
  --footer-info-bg: #353535;
  --footer-text: #b2b2b2;
  --footer-chip: #686868;

  --font: "Raleway", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --content-width: 880px;
  --card-width: 1170px;

  /* Shared grid for Experience and Education: date | logo | text */
  --col-date: 120px;
  --col-logo: 180px;
  --col-gap: 24px;
}

*,
*::before,
*::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--link); text-decoration: none; }
a:hover,
a:focus { color: var(--link-hover); text-decoration: underline; }

h1, h2, h3, h4 {
  color: var(--heading);
  font-family: var(--font);
  line-height: 1.25;
  margin: 0 0 0.5em;
}

p { margin: 0 0 1.1em; font-size: 18px; }

strong { font-weight: 700; color: var(--heading); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--card-bg);
  padding: 8px 14px;
  z-index: 10;
}
.skip-link:focus { left: 16px; top: 16px; }

/* --------------------------------------------------------------------------
   Header + hero
   -------------------------------------------------------------------------- */

.site-header {
  position: relative;
  background-color: var(--header-brown);
  background-position: center;
  background-size: cover;
  /* Same trick the old theme used: a full-size inset shadow tints the photo. */
  box-shadow: inset 0 0 0 9999em var(--header-overlay);
  color: #fff;
}

/* The brown tint mutes the wall's colours, so it gets a neutral dark tint instead. */
.site-header--wall {
  background-image: url("../images/wall-of-change.svg");
  box-shadow: inset 0 0 0 9999em rgba(10, 16, 28, 0.38);
}
.site-header--wall .hero h1,
.site-header--wall .hero p { text-shadow: 0 2px 14px rgba(0, 0, 0, 0.55); }

@media (prefers-reduced-motion: reduce) {
  .site-header--wall { background-image: url("../images/wall-of-change-static.svg"); }
}

/* Remove .is-placeholder from the header once a real photo is set. */
.site-header.is-placeholder::after {
  content: "Header photo placeholder";
  position: absolute;
  right: 16px;
  bottom: 14px;
  padding: 4px 10px;
  border: 1px dashed rgba(255, 255, 255, 0.6);
  border-radius: 3px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.85);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 24px;
  padding: 20px 0 0 24px;
}

.site-brand {
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}
.site-brand:hover,
.site-brand:focus { color: rgba(255, 255, 255, 0.8); text-decoration: none; }

.main-nav { background: var(--nav-teal); }

.main-nav ul {
  display: flex;
  margin: 0;
  padding: 0 8px;
  list-style: none;
}

.main-nav a {
  display: block;
  padding: 14px 14px 12px;
  color: #fff;
  font-size: 18px;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover,
.main-nav a:focus { color: rgba(255, 255, 255, 0.8); text-decoration: none; }
.main-nav a[aria-current="page"] { border-bottom-color: #fff; }

.hero {
  padding: 110px 16px 130px;
  text-align: center;
}

.hero h1 {
  margin: 0;
  color: #fff;
  font-size: 48px;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.hero p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: 18px;
}

/* --------------------------------------------------------------------------
   Page card + sections
   -------------------------------------------------------------------------- */

.site-main { padding: 32px 16px 56px; }

.page-card {
  max-width: var(--card-width);
  margin: 0 auto;
  background: var(--card-bg);
  padding: 56px 24px;
}

.container {
  max-width: var(--content-width);
  margin: 0 auto;
}

.section { padding: 48px 0; scroll-margin-top: 64px; }
.section + .section { border-top: 1px solid var(--rule); }
.section:first-child { padding-top: 0; }
.section--tight { padding: 30px 0; }

/* In-page jump links, pinned to the top while scrolling */
.jump-nav {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: -56px -24px 48px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--rule);
}
.jump-nav ul {
  display: flex;
  gap: 4px 24px;
  margin: 0;
  padding: 0 16px;
  list-style: none;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}
/* Centred when the links fit, scrollable from the first link when they don't */
.jump-nav li:first-child { margin-left: auto; }
.jump-nav li:last-child { margin-right: auto; }
.jump-nav a {
  display: block;
  padding: 16px 0 14px;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
}
.jump-nav a:hover,
.jump-nav a:focus { color: var(--nav-teal); text-decoration: none; }

/* "Featured in" strip */
.featured__title {
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-align: center;
  text-transform: uppercase;
}
.featured {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px 44px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.featured__item {
  display: block;
  color: var(--muted);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.featured__item:hover,
.featured__item:focus { color: var(--nav-teal); text-decoration: none; }
.featured__item img {
  height: 32px;
  width: auto;
  filter: grayscale(1);
  opacity: 0.7;
  transition: filter 0.2s, opacity 0.2s;
}
.featured__item:hover img,
.featured__item:focus img { filter: none; opacity: 1; }
.featured__item img.featured__img--tall { height: 42px; }

/* Inside Recognition the strip sits left-aligned above the awards list */
#recognition .featured__title { text-align: left; }
#recognition .featured { justify-content: flex-start; margin-bottom: 36px; }
#recognition .featured__title--awards { margin-bottom: 20px; }

.section-title {
  font-size: 33px;
  font-weight: 900;
}

.section-title--feature {
  color: var(--accent-teal);
  font-size: 48px;
  margin-bottom: 36px;
}

.lead { color: var(--muted); margin-bottom: 32px; }

/* Quote */
.quote {
  margin: 0;
  text-align: center;
}
.quote p {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 600;
  color: var(--heading);
}
.quote footer { font-size: 18px; color: var(--text); }

/* Roles */
.roles {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.role { text-align: center; }

.role__icon {
  display: grid;
  place-items: center;
  width: 84px;
  height: 84px;
  margin: 0 auto 18px;
  border: 2px solid var(--accent-teal);
  border-radius: 50%;
  color: var(--nav-teal);
}
.role__icon svg { width: 38px; height: 38px; }

.role h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.role p { font-size: 15px; color: var(--muted); margin: 0; }

/* Bio */
.bio {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
}

.bio__name { font-size: 24px; font-weight: 600; }
.bio__tagline { color: var(--muted); font-size: 16px; margin-bottom: 22px; }

/* Photo placeholders: swap the <div> for an <img> when the photo is ready. */
.photo-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  aspect-ratio: 4 / 5;
  background: var(--tint);
  border: 2px dashed var(--rule);
  border-radius: 4px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
  padding: 16px;
}
.photo-placeholder svg { width: 56px; height: 56px; opacity: 0.6; }

.headshot { width: 100%; border-radius: 4px; }

/* Company name shown next to a role title */
.company { color: var(--nav-teal); font-weight: 700; }
.company::before {
  content: "|";
  margin: 0 0.45em;
  color: var(--muted);
  opacity: 0.45;
  font-weight: 400;
}

/* Current work */
.work-list { display: grid; gap: 28px; }

.work {
  padding: 28px 28px 10px;
  border: 1px solid var(--rule);
  border-top: 4px solid var(--nav-teal);
  border-radius: 3px;
}
.work--secondary { border-top-color: var(--accent-teal); }

.work h3 { font-size: 24px; font-weight: 600; margin-bottom: 4px; }
.work__meta {
  color: var(--muted);
  font-size: 16px;
  margin-bottom: 16px;
}

.work__hook {
  color: var(--heading);
  font-size: 21px;
  font-weight: 700;
  margin-bottom: 10px;
}

.closing-line {
  margin: 32px 0 0;
  text-align: center;
  font-size: 18px;
}

/* Experience + leadership timelines */
.timeline {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 34px;
}

.timeline > li {
  display: grid;
  grid-template-columns: var(--col-date) minmax(0, 1fr);
  gap: var(--col-gap);
}

.timeline__date {
  color: var(--nav-teal);
  font-weight: 700;
  font-size: 15px;
  padding-top: 3px;
}

.timeline h3 { font-size: 20px; font-weight: 600; margin-bottom: 2px; }
.timeline__org { display: block; color: var(--muted); font-size: 16px; margin-bottom: 10px; }
.timeline p { font-size: 16px; margin-bottom: 0; }
.timeline ul { margin: 0; padding-left: 20px; }
.timeline ul li { font-size: 16px; margin-bottom: 6px; }

.timeline--compact { gap: 22px; }

/* Company logo beside an experience entry */
.exp {
  display: grid;
  grid-template-columns: var(--col-logo) minmax(0, 1fr);
  column-gap: var(--col-gap);
}
.exp > * { grid-column: 2; }
.exp > .exp__logo {
  grid-column: 1;
  grid-row: 1 / span 3;
  width: var(--col-logo);
  height: 40px;
  object-fit: contain;
  object-position: center top;
}

/* University logo in place of the school name */
.edu__logo {
  display: block;
  max-width: var(--col-logo);
  max-height: 50px;
  width: auto;
  height: auto;
  margin-bottom: 6px;
}
.timeline--compact .timeline__org { margin-bottom: 4px; }

/* Skills & interests */
.skills {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px 40px;
  margin-bottom: 28px;
}
.skills h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.skills p { font-size: 16px; margin: 0; }

/* Education */
.edu-list { display: grid; gap: 36px; }

.edu {
  display: grid;
  grid-template-columns: var(--col-date) var(--col-logo) minmax(0, 1fr);
  gap: var(--col-gap);
  align-items: start;
}

.edu__years {
  color: var(--nav-teal);
  font-weight: 700;
  font-size: 15px;
  padding-top: 4px;
}

/* Logos sit centred in their column, matching the Experience logos */
.edu__school { text-align: center; }
.edu__school h3 { font-size: 22px; font-weight: 600; margin: 0; line-height: 0; }
.edu__school .edu__logo { margin: 0 auto; }
.edu__school span { display: block; margin-top: 6px; color: var(--muted); font-size: 15px; }

.edu__detail p { font-size: 17px; margin-bottom: 6px; }
.edu__detail .note { font-size: 15px; color: var(--muted); }
.edu__detail em { color: var(--muted); font-style: italic; }

.sub-list { margin: 0 0 6px; padding-left: 20px; }
.sub-list li { font-size: 15px; color: var(--muted); margin-bottom: 2px; }

/* Research */
.pubs {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 22px;
}

.pubs li {
  padding-left: 18px;
  border-left: 3px solid var(--accent-teal);
}

.pubs .pub-title { display: block; font-weight: 700; color: var(--heading); font-size: 17px; }
.pubs .pub-meta { display: block; color: var(--muted); font-size: 15px; }
.pubs .pub-meta em { font-style: italic; }

.pubs-summary { color: var(--muted); font-size: 16px; margin-bottom: 26px; }

.cite {
  display: inline-block;
  margin-left: 8px;
  padding: 1px 8px;
  border-radius: 3px;
  background: var(--tint);
  color: var(--nav-teal);
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
}

/* Recognition */
.awards {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 40px;
}

.awards li { display: flex; gap: 14px; align-items: baseline; }

.awards .year {
  flex: none;
  min-width: 52px;
  padding: 2px 8px;
  border-radius: 3px;
  background: var(--nav-teal);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}
.awards .year--empty { background: var(--tint); color: var(--muted); }

.awards strong { display: block; font-size: 17px; }
.awards strong a { color: var(--heading); }
.awards strong a::after { content: " ↗"; color: var(--link); font-weight: 400; }
.awards strong a:hover,
.awards strong a:focus { color: var(--link); }
.awards span.org { color: var(--muted); font-size: 15px; }

/* Contact CTA */
.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta h3 { font-size: 24px; font-weight: 600; }
.cta p { margin: 0; font-size: 16px; }

.button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: none;
  padding: 12px 26px;
  background: var(--link);
  border: 1px solid var(--link);
  border-radius: 3px;
  color: #fff;
  font-family: var(--font);
  font-size: 16px;
}
.button:hover,
.button:focus {
  background: var(--link-hover);
  border-color: var(--link-hover);
  color: #fff;
  text-decoration: none;
}
.button svg { width: 18px; height: 18px; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer { background: var(--footer-bg); height: 24px; }

.site-info {
  background: var(--footer-info-bg);
  color: var(--footer-text);
  padding: 28px 16px;
}

.site-info__inner {
  max-width: var(--card-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-menu ul {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-menu a { color: var(--footer-text); }
.footer-menu a:hover,
.footer-menu a:focus { color: #fff; }

.site-info__right { display: flex; align-items: center; gap: 16px; font-size: 14px; }

.social-chip {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--footer-chip);
  color: var(--footer-info-bg);
}
.social-chip:hover,
.social-chip:focus { background: var(--link); color: #fff; }
.social-chip svg { width: 16px; height: 16px; }

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .roles { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px 24px; }
  :root { --col-date: 104px; --col-logo: 150px; --col-gap: 20px; }
}

@media (max-width: 760px) {
  .site-header__bar {
    flex-direction: column;
    gap: 14px;
    padding: 18px 0 0;
  }
  .main-nav { width: 100%; }
  .main-nav ul { flex-wrap: wrap; justify-content: center; padding: 0; }
  .main-nav a { font-size: 16px; padding: 12px 10px 10px; }

  .hero { padding: 64px 16px 80px; }
  .hero h1 { font-size: 36px; }

  .page-card { padding: 40px 16px; }
  .jump-nav { margin: -40px -16px 36px; }
  .jump-nav ul { gap: 22px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 28px; }
  .section-title--feature { font-size: 36px; }

  .bio { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .bio__photo { max-width: 240px; }

  .edu { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .edu__school { text-align: left; }
  .edu__school .edu__logo { max-width: 180px; max-height: 40px; margin: 0 0 2px; }

  .timeline > li { grid-template-columns: minmax(0, 1fr); gap: 4px; }
  .exp { grid-template-columns: minmax(0, 1fr); }
  .exp > *,
  .exp > .exp__logo { grid-column: 1; grid-row: auto; }
  .exp > .exp__logo { width: auto; max-width: 140px; height: 30px; margin: 4px 0 8px; object-position: left top; }

  .skills { grid-template-columns: minmax(0, 1fr); gap: 20px; }

  .awards { grid-template-columns: minmax(0, 1fr); }

  .cta { flex-direction: column; align-items: flex-start; }

  .work { padding: 22px 18px 6px; }
}

@media (max-width: 480px) {
  .roles { grid-template-columns: minmax(0, 1fr); }
  p { font-size: 17px; }
}