/* ==========================================================================
   MEMC website stylesheet
   Shared by every page. Colors and fonts are defined once, here.
   ========================================================================== */

:root {
  --navy: #17334e;        /* headers, footer, buttons */
  --navy-dark: #0f2437;
  --gold: #c8a253;        /* small accents */
  --ink: #26313c;         /* body text */
  --muted: #5b6a77;       /* secondary text */
  --paper: #ffffff;
  --paper-tint: #f4f6f8;  /* alternating section background */
  --line: #dde3e8;
  --serif: Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 1.05rem;
}

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

.wrap { max-width: 1000px; margin: 0 auto; padding: 0 1.25rem; }

/* --- Header / navigation ------------------------------------------------ */

header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding: 1.1rem 0;
}

.wordmark {
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: bold;
  letter-spacing: 0.06em;
  color: var(--navy);
  text-decoration: none;
}

nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.4rem; }

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}

nav a:hover { color: var(--navy); }
nav a.current { color: var(--navy); border-bottom-color: var(--gold); }

/* --- Hero (home page) --------------------------------------------------- */

.hero {
  background: var(--navy);
  color: #fff;
  padding: 4.5rem 0 4rem;
  text-align: center;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: normal;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero p {
  max-width: 620px;
  margin: 0 auto 2rem;
  color: #cdd8e2;
  font-size: 1.1rem;
}

.hero .kicker {
  text-transform: uppercase;
  letter-spacing: 0.25em;
  font-size: 0.85rem;
  color: var(--gold);
  margin-bottom: 1.2rem;
}

/* --- Buttons ------------------------------------------------------------ */

.btn {
  display: inline-block;
  padding: 0.65rem 1.6rem;
  margin: 0 0.4rem 0.5rem;
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  border-radius: 3px;
}

.btn-solid { background: var(--gold); color: var(--navy-dark); }
.btn-solid:hover { filter: brightness(1.06); }
.btn-ghost { border: 1px solid rgba(255,255,255,0.55); color: #fff; }
.btn-ghost:hover { border-color: #fff; }
.btn-navy { background: var(--navy); color: #fff; }
.btn-navy:hover { background: var(--navy-dark); }

/* --- Page sections ------------------------------------------------------ */

section { padding: 3.5rem 0; }
section.tint { background: var(--paper-tint); }

h2 {
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: normal;
  color: var(--navy);
  margin-bottom: 1.2rem;
}

h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: normal;
  color: var(--navy);
  margin: 1.6rem 0 0.5rem;
}

section p { margin-bottom: 1rem; }
section ul { margin: 0 0 1rem 1.4rem; }

.page-title {
  background: var(--paper-tint);
  border-bottom: 1px solid var(--line);
  padding: 2.6rem 0;
}

.page-title h1 {
  font-family: var(--serif);
  font-weight: normal;
  font-size: 2.2rem;
  color: var(--navy);
}

.page-title p { color: var(--muted); margin-top: 0.4rem; }

/* --- Card grid (programs, committee) ------------------------------------ */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.4rem;
  margin-top: 1.5rem;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1.5rem;
}

.card h3 { margin-top: 0; }
.card p { font-size: 0.97rem; color: var(--muted); margin-bottom: 0.6rem; }

/* --- Committee member cards --------------------------------------------- */

.person {
  text-align: center;
  padding: 1.75rem 1.25rem;
}

.person img,
.person .initials {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
}

.person .initials {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navy);
  color: #fff;
  font-family: var(--serif);
  font-size: 2.2rem;
}

.person .name { font-weight: 600; color: var(--navy); }
.person .role { font-size: 0.92rem; color: var(--muted); }

/* --- Event / seminar listings ------------------------------------------- */

.event {
  border-left: 3px solid var(--gold);
  padding: 0.2rem 0 0.2rem 1.2rem;
  margin: 1.4rem 0;
}

.event .when { font-size: 0.9rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.event .what { font-weight: 600; color: var(--navy); }
.event p { margin: 0.2rem 0 0; font-size: 0.97rem; }
.event ul { margin: 0.4rem 0 0 1.3rem; font-size: 0.97rem; }
.event li { margin-bottom: 0.15rem; }

/* Session abstract: serif body, to set it apart from the surrounding details
   (venue, organizers, name lists). Lives inside an "Abstract" toggle. */
.abstract {
  font-family: var(--serif);
  font-size: 1rem !important;
  line-height: 1.6;
  margin-top: 0.15rem !important;
}

/* Group headings inside a toggle ("Panelists", "Papers", ...). */
.program .roster-head { font-weight: 600; color: var(--navy); margin-top: 0.8rem; }
.program .roster-head:first-of-type { margin-top: 0.5rem; }

/* --- Collapsible conference program -------------------------------------- */

/* <details class="program"> starts closed; the browser handles expanding it. */
.program { margin-top: 0.7rem; }

.program > summary {
  cursor: pointer;
  display: inline-block;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--navy);
  padding: 0.15rem 0;
  border-bottom: 1px dotted var(--gold);
}

.program > summary:hover { color: var(--navy-dark); }

/* Sits under the agenda toggle, inside a past-conference entry. */
.program-download { margin-top: 0.55rem; font-size: 0.97rem; }
.program .organizers { font-size: 0.97rem; color: var(--muted); margin: 0.9rem 0 0; }
.program h3 { font-size: 1.1rem; margin: 1.4rem 0 0.3rem; }

.agenda .slot {
  display: grid;
  grid-template-columns: 11rem 1fr;
  gap: 0 1.2rem;
  padding: 0.8rem 0;
  border-top: 1px solid var(--line);
}

.agenda .time {
  font-size: 0.88rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.agenda .title { font-weight: 600; color: var(--navy); font-size: 0.97rem; }
.agenda .item p { margin: 0.15rem 0 0; font-size: 0.95rem; color: var(--muted); }
.agenda .item ul { margin: 0.4rem 0 0 1.2rem; font-size: 0.95rem; }
.agenda .item li { margin-bottom: 0.35rem; }

/* Parallel tracks within one time slot (2025 conference). */
.agenda .subsession { margin-top: 0.6rem; }
.agenda .subtitle { font-size: 0.95rem; font-weight: 600; color: var(--ink); }

/* Stack the time above the session on narrow screens. */
@media (max-width: 620px) {
  .agenda .slot { grid-template-columns: 1fr; }
  .agenda .time { margin-bottom: 0.15rem; }
}

/* --- Photo band ---------------------------------------------------------- */

.photos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.photos figure img { border-radius: 4px; width: 100%; height: 280px; object-fit: cover; }

/* Four photos in a 2x2 block, same picture size as the two-photo band. */
.photos-2x2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 620px) {
  .photos-2x2 { grid-template-columns: 1fr; }
}
.photos figcaption { font-size: 0.85rem; color: var(--muted); margin-top: 0.4rem; }

/* --- Embedded Google Form ------------------------------------------------ */

.form-embed { max-width: 760px; }
.form-embed iframe { width: 100%; border: 1px solid var(--line); border-radius: 4px; }

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

footer {
  background: var(--navy-dark);
  color: #b9c6d2;
  padding: 2.2rem 0;
  margin-top: 2rem;
  font-size: 0.9rem;
}

.footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
footer a { color: #e3ebf2; text-decoration: none; margin-right: 1.2rem; }
footer a:hover { text-decoration: underline; }