/* ==========================================================================
   SMV 2026 — Unconventional Image Sensors Meet Computer Vision
   ACCV 2026 Workshop W09 / IWISS 2026
   Plain CSS. No build step, no dependencies.
   ========================================================================== */

:root {
  --ink:        #10141c;
  --ink-soft:   #3d4655;
  --ink-mute:   #6b7688;
  --line:       #e2e6ec;
  --line-soft:  #eef1f5;
  --bg:         #ffffff;
  --bg-alt:     #f7f9fb;
  --brand:      #123a6b;
  --brand-deep: #0b2545;
  --accent:     #1f8fb0;
  --accent-soft:#e6f2f6;
  --warn:       #b3541e;
  --warn-soft:  #fdf1e7;

  --maxw: 1080px;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
          "Hiragino Sans", "Noto Sans JP", Arial, sans-serif;
}

/* --------------------------------------------------------------- reset -- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; font-weight: 700; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1em; padding-left: 1.25em; }
li { margin-bottom: .35em; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ------------------------------------------------------------- topbar -- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 37, 69, .96);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid rgba(255, 255, 255, .12);
}
.topbar .wrap {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; min-height: 56px;
}
.topbar__brand {
  color: #fff; font-weight: 700; letter-spacing: .04em;
  font-size: .95rem; white-space: nowrap;
}
.topbar__brand:hover { text-decoration: none; opacity: .85; }
.topbar nav {
  display: flex; flex-wrap: wrap; gap: 4px 2px; justify-content: flex-end;
}
.topbar nav a {
  color: rgba(255, 255, 255, .82);
  font-size: .86rem; padding: 6px 10px; border-radius: 6px;
  white-space: nowrap;
}
.topbar nav a:hover {
  color: #fff; background: rgba(255, 255, 255, .1); text-decoration: none;
}

/* --------------------------------------------------------------- hero -- */
.hero {
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(31, 143, 176, .38), transparent 60%),
    radial-gradient(700px 380px at 88% 0%, rgba(56, 90, 148, .45), transparent 62%),
    linear-gradient(160deg, #0b2545 0%, #123a6b 55%, #16436f 100%);
  color: #fff;
  padding: 68px 0 60px;
}
.hero__badges {
  display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px;
}
.badge {
  display: inline-block; font-size: .76rem; font-weight: 700;
  letter-spacing: .09em; text-transform: uppercase;
  padding: 5px 11px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .38);
  color: rgba(255, 255, 255, .95);
}
.badge--solid { background: var(--accent); border-color: var(--accent); }

.hero h1 {
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  letter-spacing: -.015em; margin-bottom: .35em; color: #fff;
}
.hero__acronym {
  display: block; font-size: .95rem; font-weight: 600;
  letter-spacing: .22em; text-transform: uppercase;
  color: rgba(255, 255, 255, .72); margin-bottom: 10px;
}
.hero__conjunction {
  font-size: 1.02rem; color: rgba(255, 255, 255, .9);
  max-width: 62ch; margin-bottom: 26px;
}
.hero__conjunction strong { color: #fff; }

.hero__facts {
  display: flex; flex-wrap: wrap; gap: 10px 30px;
  padding: 18px 0 4px;
  border-top: 1px solid rgba(255, 255, 255, .2);
}
.fact { min-width: 150px; }
.fact__label {
  display: block; font-size: .72rem; letter-spacing: .13em;
  text-transform: uppercase; color: rgba(255, 255, 255, .6);
}
.fact__value { font-size: 1.02rem; font-weight: 600; color: #fff; }

.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn {
  display: inline-block; padding: 11px 20px; border-radius: 8px;
  font-size: .92rem; font-weight: 600; border: 1px solid transparent;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: #fff; color: var(--brand-deep); }
.btn--primary:hover { background: rgba(255, 255, 255, .88); }
.btn--ghost {
  border-color: rgba(255, 255, 255, .45); color: #fff;
}
.btn--ghost:hover { background: rgba(255, 255, 255, .12); }

/* ----------------------------------------------------------- sections -- */
.section { padding: 62px 0; border-top: 1px solid var(--line-soft); }
.section--alt { background: var(--bg-alt); }
.section__eyebrow {
  font-size: .74rem; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 8px;
}
.section h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  color: var(--brand-deep); margin-bottom: .7em;
}
.section h3 {
  font-size: 1.05rem; color: var(--brand-deep);
  margin-top: 1.8em; margin-bottom: .5em;
}
.lead { font-size: 1.08rem; color: var(--ink-soft); max-width: 74ch; }
.prose { max-width: 74ch; color: var(--ink-soft); }
.prose strong { color: var(--ink); }

/* --------------------------------------------------------- topic list -- */
.topics { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 12px; }
@media (min-width: 720px) { .topics { grid-template-columns: 1fr 1fr; gap: 12px 24px; } }
.topics li {
  position: relative; padding-left: 26px; margin: 0;
  color: var(--ink-soft);
}
.topics li::before {
  content: ""; position: absolute; left: 4px; top: .68em;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--accent);
}

/* --------------------------------------------------- differentiators -- */
.pillars { display: grid; gap: 18px; margin-top: 28px; }
@media (min-width: 820px) { .pillars { grid-template-columns: repeat(3, 1fr); } }
.pillar {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 20px 16px;
}
.pillar__num {
  font-size: .74rem; font-weight: 700; letter-spacing: .1em;
  color: var(--accent); text-transform: uppercase;
}
.pillar h3 { margin: 6px 0 .4em; font-size: 1rem; }
.pillar p { font-size: .94rem; color: var(--ink-soft); margin: 0; }

/* ----------------------------------------------------------- speakers -- */
.speaker-group { margin-top: 34px; }
.speaker-group__title {
  display: flex; align-items: center; gap: 12px;
  font-size: .82rem; font-weight: 700; letter-spacing: .13em;
  text-transform: uppercase; color: var(--brand-deep); margin-bottom: 18px;
}
.speaker-group__title::after {
  content: ""; flex: 1; height: 1px; background: var(--line);
}
.speakers { display: grid; gap: 16px; }
@media (min-width: 640px) { .speakers { grid-template-columns: 1fr 1fr; } }
@media (min-width: 980px) { .speakers { grid-template-columns: repeat(3, 1fr); } }

.speaker {
  display: flex; gap: 14px; align-items: flex-start;
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 16px;
}
.speaker__avatar {
  flex: 0 0 52px; width: 52px; height: 52px; border-radius: 50%;
  background: linear-gradient(145deg, var(--brand) 0%, var(--accent) 100%);
  color: #fff; font-weight: 700; font-size: .95rem;
  display: flex; align-items: center; justify-content: center;
  letter-spacing: .02em;
}
.speaker__name { font-size: 1rem; font-weight: 700; margin: 0 0 2px; }
.speaker__affil { font-size: .86rem; color: var(--ink-mute); margin: 0 0 6px; }
.speaker__topic { font-size: .88rem; color: var(--ink-soft); margin: 0; }
.speaker--tba { border-style: dashed; background: var(--bg-alt); }
.speaker--tba .speaker__avatar {
  background: var(--line); color: var(--ink-mute);
}

/* ------------------------------------------------------------ program -- */
.table-scroll { overflow-x: auto; margin-top: 24px; }
table {
  width: 100%; border-collapse: collapse; font-size: .94rem;
  background: #fff;
}
th, td {
  text-align: left; padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft); vertical-align: top;
}
thead th {
  background: var(--brand-deep); color: #fff; font-size: .78rem;
  letter-spacing: .1em; text-transform: uppercase; font-weight: 700;
  border-bottom: none;
}
td.time { white-space: nowrap; font-variant-numeric: tabular-nums; color: var(--ink-soft); width: 1%; }
tr.is-break td { background: var(--bg-alt); color: var(--ink-mute); }
tr.is-highlight td { font-weight: 600; }

/* --------------------------------------------------------- date table -- */
.dates { margin-top: 24px; }
.dates td:first-child { font-weight: 600; }
.dates td.date { white-space: nowrap; color: var(--brand); font-weight: 600; }

/* --------------------------------------------------------------- note -- */
.note {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 18px; border-radius: 0 8px 8px 0;
  font-size: .93rem; color: var(--ink-soft); margin: 22px 0;
}
.note strong { color: var(--brand-deep); }
.note--todo {
  border-left-color: var(--warn); background: var(--warn-soft);
}
.note--todo strong { color: var(--warn); }
.note :last-child { margin-bottom: 0; }

/* ---------------------------------------------------- TBD placeholder -- */
.tbd {
  margin-top: 26px; padding: 40px 24px; text-align: center;
  background: #fff; border: 1px dashed var(--line);
  border-radius: var(--radius); color: var(--ink-mute);
}
.section--alt .tbd { background: rgba(255, 255, 255, .6); }
.tbd__label {
  font-size: .78rem; font-weight: 700; letter-spacing: .16em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 6px;
}
.tbd p:last-child { margin-bottom: 0; font-size: .95rem; }

/* ---------------------------------------------------------- organizers -- */
.organizers { display: grid; gap: 20px; margin-top: 26px; }
@media (min-width: 760px) { .organizers { grid-template-columns: 1fr 1fr; } }
.organizer {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.organizer__name { font-size: 1.1rem; margin-bottom: 2px; }
.organizer__affil { font-size: .9rem; color: var(--ink-mute); margin-bottom: 12px; }
.organizer p { font-size: .94rem; color: var(--ink-soft); }
.organizer a { font-size: .9rem; }

/* --------------------------------------------------------------- misc -- */
.support {
  display: grid; gap: 10px; margin-top: 16px; padding: 0;
  list-style: none; max-width: 74ch;
}
.support li {
  font-size: .9rem; color: var(--ink-soft); margin: 0;
  border: 1px solid var(--line); border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  padding: 11px 16px; background: #fff;
}

.venue-grid { display: grid; gap: 24px; margin-top: 24px; }
@media (min-width: 780px) { .venue-grid { grid-template-columns: 1.1fr 1fr; } }
.venue-card {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.venue-card dl { margin: 0; }
.venue-card dt {
  font-size: .74rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-mute); margin-top: 14px;
}
.venue-card dt:first-child { margin-top: 0; }
.venue-card dd { margin: 2px 0 0; font-weight: 600; }

/* ------------------------------------------------------------- footer -- */
.footer {
  background: var(--brand-deep); color: rgba(255, 255, 255, .78);
  padding: 40px 0 34px; font-size: .9rem;
}
.footer a { color: #fff; }
.footer__title { color: #fff; font-weight: 700; margin-bottom: 6px; }
.footer__meta { margin-top: 18px; font-size: .82rem; color: rgba(255, 255, 255, .55); }

/* --------------------------------------------------------------- print -- */
@media print {
  .topbar, .hero__actions { display: none; }
  body { font-size: 11pt; }
  .hero { background: none; color: #000; padding: 0 0 20px; }
  .hero h1, .fact__value, .hero__conjunction { color: #000; }
}