/*
Theme Name: Frac Sand Conference
Author: The Power Connection
Description: Fast, mobile-first custom theme for the 2026 Frac Sand Conference, matching the labs app mockups (Barlow Condensed / Barlow, steel-blue-and-orange, soft-rounded hairline-bordered cards). Zero required plugins — every content type (speakers, schedule, sponsors, attendees) is a native custom post type with its own lightweight admin fields.
Version: 1.6.4
Requires at least: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: fracsand
*/

/* ==========================================================================
   1. TOKENS
   ========================================================================== */
:root {
  --color-bg: #f5f4f1;
  --color-surface: #fdfdfb;
  --color-surface-2: #eceae5;
  --color-text: #1d1f20;
  --color-text-muted: #5d5d60;
  --color-text-faint: #8a8a8d;

  --color-primary: #0266af;
  --color-primary-dark: #024e87;
  --color-accent: #fb9c1c;
  --color-accent-dark: #d9850f;
  --color-accent-tint: #fdf3ea;
  --color-accent-tint-border: #e3b98a;

  --color-line: #e4e2dd;
  --color-line-strong: #cfccc5;

  --color-neutral-100: #f5f5f8;
  --color-neutral-200: #e9e9ea;
  --color-neutral-300: #d4d4d7;
  --color-neutral-400: #b7b7ba;
  --color-neutral-500: #98989b;
  --color-neutral-600: #7a7a7d;
  --color-neutral-700: #5d5d60;
  --color-neutral-800: #424244;
  --color-neutral-900: #2b2b2d;

  --font-heading: "Barlow Condensed", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Barlow", system-ui, -apple-system, "Segoe UI", sans-serif;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;

  /* Rounded, soft-cornered throughout — matches the app mockups. */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-xl: 14px;
  --radius-pill: 999px;

  --shadow-sm: 0 1px 2px rgba(29, 31, 32, 0.08);
  --shadow-md: 0 3px 10px rgba(29, 31, 32, 0.10);
  --shadow-lg: 0 12px 28px rgba(29, 31, 32, 0.16);

  --header-h: 56px;
  --tabbar-h: 62px;
  --content-max: 880px;
}

/* ==========================================================================
   2. RESET
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(var(--tabbar-h) + env(safe-area-inset-bottom));
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-dark); }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.05;
  margin: 0 0 var(--space-2);
  color: var(--color-text);
}
h1 { font-size: 32px; letter-spacing: 0.2px; }
h2 { font-size: 24px; }
h3 { font-size: 19px; }
h4 { font-size: 15px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-muted); }
p { margin: 0 0 var(--space-3); }
button { font-family: inherit; }

.wrap { max-width: var(--content-max); margin: 0 auto; padding-left: var(--space-5); padding-right: var(--space-5); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--color-primary); color: #fff; padding: var(--space-2) var(--space-4); z-index: 1000; }
.skip-link:focus { left: var(--space-2); top: var(--space-2); }

/* ==========================================================================
   3. HEADER / NAV
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 40;
  background: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.site-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
  padding: 0 var(--space-5);
  max-width: var(--content-max);
  margin: 0 auto;
}
.site-header__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 19px;
  color: var(--color-accent);
  line-height: 1.1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.site-header__title a { color: inherit; }

.site-nav { display: none; }
.site-nav ul { display: flex; gap: var(--space-5); }
.site-nav a {
  color: rgba(255,255,255,0.88);
  font-size: 14px; font-weight: 500;
  padding: var(--space-2) 0;
  border-bottom: 2px solid transparent;
}
.site-nav a:hover, .site-nav a[aria-current="page"] {
  color: #fff; border-bottom-color: var(--color-accent);
}

.menu-toggle {
  background: none; border: none; color: #fff; padding: var(--space-2);
  display: flex; align-items: center; justify-content: center; cursor: pointer;
}
.menu-toggle svg { width: 24px; height: 24px; flex: none; stroke: #fff; }
.mobile-menu__close svg { width: 22px; height: 22px; flex: none; stroke: #fff; }

@media (min-width: 780px) {
  .site-nav { display: block; }
  .menu-toggle { display: none; }
  body { padding-bottom: 0; }
  .tab-bar { display: none; }
}

/* ==========================================================================
   4. BOTTOM TAB BAR (mobile)
   ========================================================================== */
.tab-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 40;
  display: flex;
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  padding-bottom: env(safe-area-inset-bottom);
  box-shadow: 0 -2px 10px rgba(29,31,32,0.08);
}
.tab-bar__item {
  flex: 1 1 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px;
  height: var(--tabbar-h);
  color: var(--color-text-faint);
  font-size: 10.5px; font-weight: 500;
  min-width: 0;
}
.tab-bar__item span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.tab-bar__item svg { width: 20px; height: 20px; flex: none; }
.tab-bar__item[aria-current="page"] { color: var(--color-primary); }
.tab-bar__item[aria-current="page"] svg { stroke: var(--color-accent); }

/* ==========================================================================
   5. MOBILE MENU (off-canvas, no-JS-required fallback via details)
   ========================================================================== */
.mobile-menu {
  position: fixed; inset: 0; z-index: 60;
  background: rgba(20,24,28,0.5);
  display: none;
}
.mobile-menu.is-open { display: block; }
.mobile-menu__panel {
  position: absolute; top: 0; right: 0; bottom: 0; width: min(78vw, 320px);
  background: var(--color-primary-dark);
  padding: var(--space-6) var(--space-5);
  display: flex; flex-direction: column; gap: var(--space-1);
}
.mobile-menu__close {
  align-self: flex-end; background: none; border: none; color: #fff; padding: var(--space-2); cursor: pointer;
}
.mobile-menu a {
  display: flex; align-items: center; gap: var(--space-3);
  color: rgba(255,255,255,0.92); font-size: 16px; font-weight: 500;
  padding: var(--space-3) var(--space-1);
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.mobile-menu a svg { width: 18px; height: 18px; flex: none; }

/* ==========================================================================
   6. HERO / SECTIONS
   ========================================================================== */
.hero {
  background: linear-gradient(165deg, var(--color-primary-dark) 0%, var(--color-primary) 70%);
  color: #fff;
  padding: var(--space-8) var(--space-5) var(--space-6);
  text-align: center;
}
.hero__kicker { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255,255,255,0.7); margin-bottom: var(--space-2); }
.hero h1 { color: #fff; font-size: 34px; }
.hero p { color: rgba(255,255,255,0.82); max-width: 46ch; margin-left: auto; margin-right: auto; }
.hero .hero__welcome {
  color: var(--color-accent);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 22px;
  text-transform: uppercase;
  letter-spacing: 0.5em;
  text-align: center;
  margin: var(--space-2) auto 0;
}

/* Blue page-title banner (Schedule, Speakers, etc.) — an expanded
   continuation of the site header, matching the app mockup's title block. */
.page-banner {
  background: var(--color-primary);
  padding: var(--space-4) 0 var(--space-6);
}
.page-banner__kicker {
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--color-accent); font-weight: 700; margin: 0 0 4px;
}
.page-banner__title {
  font-family: var(--font-heading); font-weight: 700; font-size: 30px;
  color: #fff; text-transform: uppercase; letter-spacing: 1px; margin: 0;
}
@media (min-width: 780px) {
  .page-banner__title { font-size: 36px; }
}

.section { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.section--tight { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.section__head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-4); }
.section__head h2 {
  margin: 0;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.07em;
  color: var(--color-primary);
  font-weight: 700;
}
.section__head .link-more { font-size: 13px; font-weight: 600; white-space: nowrap; }

/* ==========================================================================
   7. CARD (soft rounded, hairline border — matches the app mockups)
   ========================================================================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}
.card--tile { border-radius: var(--radius-xl); }

/* ==========================================================================
   8. BUTTONS & TAGS
   ========================================================================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  background: var(--color-accent); color: #2b2b2d;
  font-weight: 700; font-size: 14px;
  padding: 12px 20px; border: none; border-radius: var(--radius-lg);
  cursor: pointer;
}
.btn:hover { background: var(--color-accent-dark); color: #2b2b2d; }
.btn--ghost { background: transparent; border: 1px solid rgba(255,255,255,0.5); color: #fff; }
.btn--ghost:hover { background: rgba(255,255,255,0.1); color: #fff; }
.btn--block { width: 100%; }

.tag {
  display: inline-block; font-size: 10.5px; font-weight: 700; letter-spacing: 0.02em;
  padding: 3px 9px; border-radius: var(--radius-pill);
  text-transform: uppercase;
}

/* ==========================================================================
   9. GRIDS
   ========================================================================== */
.grid { display: grid; gap: var(--space-4); grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(2, 1fr); }
.grid--4 { grid-template-columns: repeat(2, 1fr); }
@media (min-width: 600px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}
@media (min-width: 780px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
}

.explore-tile {
  padding: var(--space-4) var(--space-3);
  display: flex; flex-direction: column; gap: var(--space-2); align-items: flex-start;
  color: var(--color-text);
  border-radius: var(--radius-xl);
}
.explore-tile__icon svg { width: 22px; height: 22px; color: var(--color-primary); }
.explore-tile__icon {
  width: 38px; height: 38px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: #eeeeee; color: var(--color-primary);
}
.explore-tile__title { font-family: var(--font-heading); font-weight: 600; font-size: 17px; color: var(--color-primary); }
.explore-tile__desc { font-size: 12.5px; color: var(--color-text-muted); margin: 0; }

.info-row {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4);
  margin-top: var(--space-4);
  color: var(--color-text);
  border-radius: var(--radius-xl);
}
.info-row__text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.info-row__title { font-family: var(--font-heading); font-weight: 600; font-size: 17px; color: var(--color-primary); }
.info-row__desc { font-size: 12.5px; color: var(--color-text-muted); }

/* ==========================================================================
   10. AVATAR (initials, replaces headshot until a Featured Image is set)
   ========================================================================== */
.avatar {
  width: 48px; height: 48px; flex: none;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-neutral-200); color: var(--color-primary-dark);
  font-family: var(--font-heading); font-weight: 600; font-size: 16px;
  overflow: hidden; position: relative;
  border-radius: 50%;
}
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar--lg { width: 84px; height: 84px; font-size: 26px; }

/* duotone wash for uploaded photography, per the Industry system */
.duotone { position: relative; overflow: hidden; }
.duotone::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: var(--color-primary); mix-blend-mode: color;
}

/* ==========================================================================
   11. PERSON CARD (speakers & attendees — same rounded-row treatment)
   ========================================================================== */
.person-card {
  padding: var(--space-3);
  display: flex; gap: var(--space-3); align-items: center;
  margin-bottom: var(--space-2);
}
.person-card--align-top { align-items: flex-start; }
.person-card__name { font-family: var(--font-heading); font-weight: 600; font-size: 16px; margin-bottom: 1px; }
.person-card__role { font-size: 12.5px; color: var(--color-text-muted); margin-bottom: var(--space-2); }
.person-card__tags { display: flex; gap: var(--space-1); flex-wrap: wrap; }
.speaker-bio { margin-top: var(--space-2); font-size: 13.5px; color: var(--color-text-muted); }

/* Speakers list — compact clickable row, opens the detail sheet below */
.speaker-row {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3); width: 100%;
  background: var(--color-surface); font: inherit; text-align: left; cursor: pointer;
  -webkit-tap-highlight-color: transparent; -webkit-appearance: none; appearance: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
}
.speaker-row[hidden] {display: none;}
.speaker-row:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.speaker-row:hover { border-color: var(--color-line-strong); }
.speaker-row--static { cursor: default; }
.speaker-row--static:hover { border-color: var(--color-line); }
.speaker-row__text { min-width: 0; flex: 1; }
.speaker-row__name { display: block; font-family: var(--font-heading); font-weight: 600; font-size: 16px; color: var(--color-primary); }
.speaker-row__company { display: block; font-size: 11px; color: var(--color-text-muted); margin-top: 1px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.speaker-row__chevron { flex: none; display: flex; color: var(--color-text-faint); }
.speaker-row__chevron svg { width: 18px; height: 18px; }

.search-bar { margin-bottom: var(--space-4); }
.search-input {
  width: 100%; box-sizing: border-box;
  border: 1px solid var(--color-line); background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 10px 14px; font-size: 14px; font-family: inherit; color: var(--color-text);
}
.search-input:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; }
.search-input::-webkit-search-cancel-button { cursor: pointer; }
.search-empty { color: var(--color-text-muted); font-size: 14px; padding: var(--space-2) 0 var(--space-4); }

/* Attendees list — A–Z groups, no photo/avatar, no detail popup */
.az-group { margin-top: var(--space-5); }
.az-group h4 { margin: 0 0 var(--space-2); }
.attendee-row { padding: var(--space-3); }
.attendee-row__name { font-family: var(--font-heading); font-weight: 600; font-size: 16px; color: var(--color-primary); }
.attendee-row__title { font-size: 11px; font-style: italic; color: var(--color-text-muted); margin-top: 2px; }
.attendee-row__company { font-size: 11px; color: var(--color-text-muted); margin-top: 1px; }

/* ==========================================================================
   12. SCHEDULE
   ========================================================================== */
.day-tabs { display: flex; gap: var(--space-2); margin-bottom: var(--space-5); overflow-x: auto; }
.day-tab {
  flex: 1; background: var(--color-surface); border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 10px 16px; font-weight: 700; font-family: var(--font-heading); font-size: 16px;
  cursor: pointer; color: var(--color-text-muted); text-align: center;
}
.day-tab small { display: block; font-size: 12px; font-weight: 500; font-family: var(--font-body); margin-top: 2px; color: inherit; }
.day-tab[aria-selected="true"] { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.day-tab[aria-selected="true"] small { color: #fff; opacity: 0.75; }
.day-panel[hidden] { display: none; }
.day-panel { padding-top: var(--space-1); }

/* Timeline: time column, dot + connecting line, session card */
.timeline-item {
  display: grid; grid-template-columns: 62px 20px 1fr; gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.timeline-item.is-past-only { opacity: 0.5; }

.timeline-time { text-align: right; padding-top: 13px; }
.timeline-time__start { font-size: 13px; font-weight: 700; color: var(--color-primary); }
.timeline-time__duration { font-size: 11px; color: var(--color-text-faint); margin-top: 1px; }

.timeline-dot-col { display: flex; flex-direction: column; align-items: center; padding-top: 15px; }
.timeline-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--color-neutral-400); flex: none; }
.timeline-line { width: 2px; flex: 1; background: var(--color-line); margin-top: 2px; }
.timeline-item:last-child .timeline-line { display: none; }
.timeline-item.is-live .timeline-dot { background: var(--color-accent); box-shadow: 0 0 0 4px rgba(251, 156, 28, 0.22); }

.timeline-card { padding: 11px 14px; }
.timeline-item.is-live .timeline-card { background: var(--color-accent-tint); border-color: var(--color-accent-tint-border); }
.timeline-card__tags { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: 5px; }
.timeline-card__title { font-weight: 600; font-size: 15px; line-height: 1.3; }
.timeline-card__location { font-size: 12.5px; color: var(--color-text-muted); margin-top: 3px; }

.tag-live { background: var(--color-accent); color: #fff; }

button.timeline-item {
  background: none; border: none; padding: 0; margin: 0 0 var(--space-3);
  width: 100%; font: inherit; text-align: left; cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
button.timeline-item:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-lg); }
button.timeline-item:hover .timeline-card { border-color: var(--color-line-strong); }

/* Session detail sheet — bottom sheet on mobile, centered modal on wider screens */
.sheet-backdrop {
  position: fixed; inset: 0; z-index: 70;
  background: rgba(15, 15, 20, 0.45);
  display: none;
}
.sheet-backdrop.is-open { display: block; }

.sheet {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 71;
  max-height: 85vh; overflow-y: auto;
  background: var(--color-surface);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.2);
  display: none;
}
.sheet.is-open { display: block; }

.sheet__handle { display: flex; justify-content: center; padding: 10px 0 4px; }
.sheet__handle span { width: 36px; height: 4px; border-radius: 3px; background: var(--color-line-strong); display: block; }

.sheet__body { padding: 8px var(--space-5) var(--space-2); max-width: var(--content-max); margin: 0 auto; }
.sheet__tags { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; margin-bottom: var(--space-3); }
.sheet__title { margin: 0 0 var(--space-3); font-size: 22px; }
.sheet__meta { display: flex; align-items: center; gap: 6px; font-size: 13.5px; color: var(--color-text-muted); margin: 0 0 4px; }
.sheet__desc { margin-top: var(--space-4); font-size: 14px; line-height: 1.6; color: var(--color-text); }

.sheet__speakers { margin-top: var(--space-5); display: flex; flex-direction: column; gap: var(--space-2); }
.sheet__speaker {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3); border-radius: var(--radius-lg);
  background: var(--color-neutral-100);
  text-decoration: none; color: inherit;
}
.sheet__speaker:hover { background: var(--color-neutral-200); }
.sheet__speaker-name { display: block; font-family: var(--font-heading); font-weight: 600; font-size: 14px; color: var(--color-text); }
.sheet__speaker-role { display: block; font-size: 12.5px; color: var(--color-text-muted); margin-top: 1px; }

.session-sponsor { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-5); padding-top: var(--space-4); border-top: 1px solid var(--color-line); }
.session-sponsor__label {
  font-size: 12.5px; font-style: italic; font-weight: 400;
  color: var(--color-text-muted);
}
.session-sponsor__logo { width: 100px; height: auto; display: block; }
.session-sponsor__name { font-size: 11px; font-weight: 600; color: var(--color-primary); }
.session-sponsor--compact { margin-top: var(--space-2); padding-top: var(--space-2); border-top: none; }

.sheet__footer { padding: var(--space-4) var(--space-5) calc(var(--space-5) + env(safe-area-inset-bottom)); border-top: 1px solid var(--color-line); max-width: var(--content-max); margin: 0 auto; }

/* Speaker detail sheet — profile header (large photo + name/title/company) and session list */
.sheet__profile { display: flex; align-items: center; gap: var(--space-4); margin-bottom: var(--space-4); }
.sheet__avatar {
  flex: none; width: 96px; height: 96px; border-radius: 50%; overflow: hidden;
  background: var(--color-neutral-200);
}
.sheet__avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.sheet__avatar--empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  border: 2px dashed var(--color-accent-tint-border);
  background: var(--color-accent-tint);
  color: var(--color-text-muted);
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
}
.sheet__avatar--empty svg { width: 26px; height: 26px; color: var(--color-neutral-500); }
.sheet__profile-text { min-width: 0; }
.sheet__profile-name { font-family: var(--font-heading); font-weight: 700; font-size: 20px; color: var(--color-primary); line-height: 1.25; }
.sheet__profile-title { font-size: 13px; color: var(--color-text-muted); margin-top: 3px; }
.sheet__profile-company { font-size: 13px; color: var(--color-text-muted); }

.sheet__sessions { margin-top: var(--space-2); display: flex; flex-direction: column; gap: var(--space-2); }
.sheet__session { padding: 11px 13px; border-radius: var(--radius-lg); background: var(--color-neutral-100); border: 1px solid var(--color-line); }
.sheet__session-tags { display: flex; align-items: center; gap: 6px; margin-bottom: 5px; }
.sheet__session-title { font-weight: 600; font-size: 14px; color: var(--color-text); line-height: 1.3; }
.sheet__session-meta { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }

@media (min-width: 780px) {
  .sheet {
    left: 50%; right: auto; bottom: auto; top: 50%; transform: translate(-50%, -50%);
    width: min(560px, 92vw); max-height: 80vh; border-radius: var(--radius-xl);
  }
  .sheet__handle { display: none; }
}

/* ==========================================================================
   13. A–Z JUMP (attendees use .person-card above for each row)
   ========================================================================== */
.az-jump { display: flex; flex-wrap: wrap; gap: var(--space-1); margin-bottom: var(--space-4); font-size: 12px; }
.az-jump a { padding: 3px 8px; border: 1px solid var(--color-line); border-radius: var(--radius-pill); color: var(--color-text-muted); }

/* ==========================================================================
   14. SPONSORS
   ========================================================================== */
.tier-block { margin-bottom: var(--space-6); }
.tier-label {
  display: inline-block; padding: 4px 12px; margin-bottom: var(--space-3);
  border-radius: var(--radius-pill);
  font-family: var(--font-heading); font-weight: 600; font-size: 14px; letter-spacing: 0.03em;
}
.sponsor-tile {
  padding: var(--space-3); display: flex; align-items: center; justify-content: center;
  min-height: 76px; text-align: center; font-weight: 600; font-size: 13.5px; color: var(--color-text-muted);
}
.sponsor-tile img { max-width: 100%; max-height: 100px; width: auto; height: auto; object-fit: contain; }
.sponsor-tile--empty {
  flex-direction: column; gap: 4px;
  border: 2px dashed var(--color-accent-tint-border);
  background: var(--color-accent-tint);
}
.sponsor-tile--empty svg { width: 22px; height: 22px; color: var(--color-neutral-500); }
.sponsor-tile--empty span { font-size: 11px; font-weight: 600; color: var(--color-text-muted); line-height: 1.3; }

/* ==========================================================================
   15. INFO / FAQ / DEFINITION BLOCKS
   ========================================================================== */
.info-block { padding: var(--space-4); margin-bottom: var(--space-4); }
.info-block h3 { margin-bottom: var(--space-3); }

.info-label {
  margin: 0 0 var(--space-2);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.07em;
  color: var(--color-primary);
  font-weight: 700;
}
.info-label:not(:first-child) { margin-top: var(--space-6); }

.kv-list { display: flex; flex-direction: column; }
.kv-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-2) 0; font-size: 14px; }
.kv-row__label { color: var(--color-text-muted); }
.kv-row__value { margin: 0; font-weight: 700; color: var(--color-primary); }

.exhibit-card { padding: var(--space-4); margin-bottom: var(--space-4); }
.exhibit-card:last-child { margin-bottom: 0; }
.exhibit-card__title { margin-bottom: var(--space-3); }
.exhibit-card__hours { margin: var(--space-3) 0 0; font-size: 13px; color: var(--color-text-muted); }

.exhibit-map {
  display: block; width: 100%; padding: 0; margin: 0; border: none; background: var(--color-neutral-200);
  font: inherit; text-align: left; cursor: pointer;
  border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 16 / 9;
  -webkit-tap-highlight-color: transparent;
}
.exhibit-map__img { width: 100%; height: 100%; object-fit: cover; object-position: center; display: block; border-radius: var(--radius-lg); }
.exhibit-map--empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-2);
  aspect-ratio: 16 / 9; min-height: 160px; padding: var(--space-5);
  border: 2px dashed var(--color-accent-tint-border);
  background: var(--color-accent-tint);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  font-size: 13px; font-weight: 600; text-align: center; cursor: default;
}
.exhibit-map--empty svg { width: 26px; height: 26px; color: var(--color-neutral-500); }

.wifi-sponsor { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-3); }
.wifi-sponsor__label {
  display: inline-block; flex: none;
  background: var(--color-neutral-300); color: var(--color-neutral-800);
  font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 3px 9px; border-radius: var(--radius-pill);
}
.wifi-sponsor__logo {
  width: auto;
  height: 28px;
  max-width: 160px;
  aspect-ratio: auto;
  display: block;
}
.wifi-sponsor__name { font-size: 11px; font-weight: 600; color: var(--color-primary); }
.wifi-sponsor__placeholder { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--color-text-muted); }
.wifi-sponsor__placeholder svg { width: 16px; height: 16px; color: var(--color-neutral-500); }

.faq-item { border-bottom: 1px solid var(--color-line); }
.faq-item summary {
  padding: var(--space-3) 0; cursor: pointer; font-weight: 600; font-size: 14.5px;
  display: flex; align-items: center; justify-content: space-between; list-style: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--color-text-muted); }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { padding-bottom: var(--space-3); color: var(--color-text-muted); font-size: 13.5px; }

/* ==========================================================================
   16. VENUE MAP VIEWER (Additional Info, exhibit hall / expo maps)
   ========================================================================== */
.map-viewer {
  position: fixed; inset: 0; z-index: 90;
  background: #101012;
  display: none; flex-direction: column;
}
.map-viewer.is-open { display: flex; }

.map-viewer__header {
  flex: none; display: flex; align-items: center; justify-content: space-between;
  padding: calc(var(--space-3) + env(safe-area-inset-top)) var(--space-4) var(--space-3);
  background: rgba(0, 0, 0, 0.35);
}
.map-viewer__title { color: #fff; font-family: var(--font-heading); font-weight: 600; font-size: 15px; }
.map-viewer__controls { display: flex; align-items: center; gap: var(--space-2); }
.map-viewer__zoom-btn, .map-viewer__close {
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%; border: none;
  background: rgba(255, 255, 255, 0.12); color: #fff;
  font-size: 20px; line-height: 1; cursor: pointer;
}
.map-viewer__zoom-btn:hover, .map-viewer__close:hover { background: rgba(255, 255, 255, 0.22); }
.map-viewer__close svg { width: 18px; height: 18px; }

.map-viewer__stage {
  flex: 1; overflow: hidden; position: relative;
  display: flex; align-items: center; justify-content: center;
  touch-action: none; cursor: grab;
}
.map-viewer__stage.is-dragging { cursor: grabbing; }
.map-viewer__img {
  max-width: 100%; max-height: 100%; object-fit: contain;
  user-select: none; -webkit-user-drag: none;
  transform-origin: center center; will-change: transform;
}
.map-viewer__hint {
  flex: none; text-align: center; margin: 0;
  padding: var(--space-2) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom));
  color: rgba(255, 255, 255, 0.55); font-size: 12px;
}

/* ==========================================================================
   17. UP NEXT / TEASERS (Home)
   ========================================================================== */
.up-next {
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  background: var(--color-accent-tint);
  border-color: var(--color-accent-tint-border);
}
.up-next .tag { margin-bottom: var(--space-2); }
.up-next .session-row__meta { font-size: 12.5px; }

.sponsor-banner {
  margin-top: var(--space-4);
  border-radius: var(--radius-xl);
  background: var(--color-neutral-300);
  padding: 0;
  position: relative;
  overflow: hidden;
  min-height: 200px;
}
.sponsor-banner__label {
  position: absolute;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 2;

  display: inline-block;
  background: rgba(29, 31, 32, 0.7);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 10.5px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
}
.sponsor-banner__placeholder {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 84px;
  color: var(--color-neutral-600);
  font-size: 12.5px; text-align: center;
}
.sponsor-banner__placeholder svg { width: 26px; height: 26px; color: var(--color-neutral-500); }
.sponsor-banner__link {
  position: absolute;
  inset: 0;
  display: block;
}
.sponsor-banner__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   18. UTILITIES
   ========================================================================== */
.center { text-align: center; }
.mt-0 { margin-top: 0; }
.stack-sm > * + * { margin-top: var(--space-2); }

/* ==========================================================================
   19. ACCESS SPLASH SCREEN (optional password gate, Settings > Splash Screen)
   ========================================================================== */
/* A fixed overlay on top of the normal page (not a standalone page of its
   own) — see fracsand_splash_print_overlay() in inc/splash.php for why:
   WP Engine's Edge Full Page Cache can't vary its cache by cookie, so the
   real page always renders and caches normally underneath this, and a tiny
   inline script decides whether to show or hide the overlay in each
   visitor's own browser. Visible by default (fail closed) — the script
   only ever hides it, never shows it, so a visitor never sees a flash of
   real content before the check runs. */
.fracsand-splash {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; flex-direction: column;
  background: linear-gradient(165deg, var(--color-primary-dark) 0%, var(--color-primary) 70%);
  padding: 0 var(--space-5) var(--space-6);
  overflow-y: auto;
}
html.fracsand-locked { overflow: hidden; }

/* Everything above the sponsor strip. This grows to fill the screen so the
   sponsor block stays pinned to the bottom (same trick as before, just one
   level up — see .fracsand-splash__logo below for why). */
.fracsand-splash__upper {
  flex: 1; min-height: 0;
  display: flex; flex-direction: column;
}

/* Logo — flex:1 makes this fill all the leftover space above the password
   form (i.e. from the very top of the screen down to where the form
   starts), and centers the logo within that space — so the logo ends up
   vertically centered between the top of the screen and the password
   field, whatever that distance happens to be on a given screen. */
.fracsand-splash__logo {
  flex: 1;
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-6) 0;
  box-sizing: border-box;
}
.fracsand-splash__logo-img { max-width: 65%; max-height: 100%; width: auto; height: auto; object-fit: contain; display: block; }
.fracsand-splash__logo-text {
  font-family: var(--font-heading); font-weight: 700; font-size: 30px;
  color: #fff; text-transform: uppercase; letter-spacing: 1px; text-align: center;
}

/* Password form — natural height, sits directly below the logo (the logo's
   flex:1 above is what pushes this down rather than the form centering
   itself in its own space). */
.fracsand-splash__main {
  flex: 0 0 auto; display: flex; flex-direction: column; align-items: center;
  max-width: 360px; margin: 0 auto; width: 100%;
}
.fracsand-splash__form { width: 100%; display: flex; flex-direction: column; gap: var(--space-3); }
.fracsand-splash__label {
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(255, 255, 255, 0.75); font-weight: 700; text-align: center;
}
.fracsand-splash__input {
  width: 100%; box-sizing: border-box;
  padding: 13px 16px; border-radius: var(--radius-lg); border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1); color: #fff; font-size: 16px; text-align: center;
  letter-spacing: 0.08em;
}
.fracsand-splash__input::placeholder { color: rgba(255, 255, 255, 0.5); }
.fracsand-splash__input:focus { outline: none; border-color: var(--color-accent); background: rgba(255, 255, 255, 0.16); }
.fracsand-splash__error { color: var(--color-accent); font-size: 13px; text-align: center; margin: 0; }
.fracsand-splash__submit { width: 100%; }

/* App sponsor — pinned to the bottom of the screen, same treatment as the
   Wi-Fi sponsor block on the Additional Info page. */
.fracsand-splash__sponsor {
  flex: none; display: flex; flex-direction: column; align-items: center; gap: var(--space-2);
  padding-top: var(--space-6);
}
.fracsand-splash__sponsor-label {
  font-size: 9px; letter-spacing: 0.14em; text-transform: uppercase;
  color: #fff; font-weight: 700;
}
.fracsand-splash__sponsor-logo { max-width: 140px; max-height: 40px; width: auto; height: auto; display: block; }
.fracsand-splash__sponsor-name { color: #fff; font-weight: 600; font-size: 14px; }