:root {
  --denim: #2f557f;
  --warm: #ffa92d;
  --ming: #3e8391;

  --bg-soft: #f3f7fb;
  --bg-ming-soft: #eef6f7;
  --warm-soft: #fff4e2;
  --border: #c6d4e3;
  --text: #1c2b3d;
  --muted: #4f647a;
  --success: #2f7a58;
  --danger: #a03a2f;
  --today: #a96300;

  --hover-denim: #254567;
  --hover-ming: #316a75;
  --focus-ring: 0 0 0 3px rgba(255, 169, 45, 0.35);
  --radius: 14px;
}

/*
@font-face {
  font-family: "Agatho";
  src: url("../fonts/agatho.woff2") format("woff2");
  font-display: swap;
}
*/

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Open Sans", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 0% 0%, rgba(62, 131, 145, 0.22), transparent 40%),
    radial-gradient(circle at 100% 0%, rgba(255, 169, 45, 0.2), transparent 38%),
    linear-gradient(180deg, #ffffff, var(--bg-soft));
  min-height: 100vh;
  line-height: 1.5;
}

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
}

.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: #fff;
  color: var(--denim);
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  z-index: 200;
}

.site-header {
  background: linear-gradient(125deg, var(--denim), #25527a 58%, var(--ming));
  color: #fff;
  padding: 1.2rem 1rem 1.8rem;
  border-bottom: 4px solid var(--warm);
}

.brand-wrap {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 1rem;
  align-items: start;
  max-width: 1100px;
  margin: 0 auto;
}

.brand-logo {
  width: 86px;
  height: 86px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.9);
  border: 2px solid rgba(255, 255, 255, 0.65);
  padding: 0.35rem;
  object-fit: cover;
}

.brand-kicker {
  margin: 0;
  font-size: clamp(0.88rem, 1.7vw, 1rem);
  letter-spacing: 0.02em;
  text-transform: none;
  font-weight: 700;
  line-height: 1.25;
  color: #ffe7bc;
}

.brand-kicker-primary {
  font-weight: 800;
}

.brand-kicker-secondary {
  margin-top: 0.16rem;
  font-size: clamp(0.8rem, 1.4vw, 0.9rem);
  letter-spacing: 0.03em;
  text-transform: none;
  color: #dce9ff;
}

h1,
h2,
h3,
h4 {
  font-family: "Agatho", "Open Sans", system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  letter-spacing: 0.01em;
}

h1 {
  margin: 0.2rem 0 0.45rem;
  font-size: clamp(1.35rem, 3.7vw, 2.3rem);
  line-height: 1.2;
}

.brand-goal {
  margin: 0;
  max-width: 75ch;
  color: #edf4ff;
}

.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

.section-head {
  margin-top: 0.55rem;
}

h2 {
  color: var(--denim);
  margin: 0 0 0.8rem;
  font-size: clamp(1.2rem, 2.8vw, 1.7rem);
}

.controls {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem;
  display: grid;
  gap: 0.85rem;
}

.control-field {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
}

.control-field span {
  font-size: 0.92rem;
  color: var(--muted);
}

input[type="search"],
select {
  width: 100%;
  min-height: 2.7rem;
  border: 1px solid #95aec7;
  border-radius: 10px;
  padding: 0.52rem 0.7rem;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.toggle-wrap {
  background: var(--bg-ming-soft);
  border: 1px solid #b6ced2;
  border-radius: 10px;
  padding: 0.65rem;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  color: var(--denim);
}

input[type="checkbox"] {
  width: 1.05rem;
  height: 1.05rem;
}

.timezone-hint {
  margin: 0.45rem 0 0;
  font-size: 0.86rem;
  color: var(--muted);
}

.month-nav {
  margin-top: 0.9rem;
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.month-nav a {
  text-decoration: none;
  color: var(--denim);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font-weight: 700;
  font-size: 0.88rem;
}

.month-group {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.month-group summary {
  list-style: none;
  cursor: pointer;
  background: linear-gradient(90deg, #ffffff, var(--bg-soft));
  border-bottom: 1px solid var(--border);
  padding: 0.85rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  color: var(--denim);
}

.month-group summary::-webkit-details-marker {
  display: none;
}

.month-group summary::after {
  content: "+";
  font-size: 1.2rem;
  color: var(--ming);
}

.month-group[open] summary::after {
  content: "−";
}

.month-content {
  padding: 0.75rem;
  display: grid;
  gap: 0.75rem;
}

.session-card {
  border: 1px solid #d6e1ec;
  border-radius: 12px;
  padding: 0.85rem;
  background: #fff;
  box-shadow: 0 3px 12px rgba(19, 37, 64, 0.06);
}

.session-card-next {
  border: 2px solid rgba(255, 169, 45, 0.95);
  box-shadow:
    0 0 0 4px rgba(255, 169, 45, 0.16),
    0 14px 28px rgba(47, 85, 127, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 244, 226, 0.92), #ffffff 28%);
}

.session-card-next .session-head {
  padding: 0.25rem 0.35rem;
  margin: -0.1rem -0.1rem 0.2rem;
  border-radius: 10px;
  background: linear-gradient(90deg, rgba(255, 169, 45, 0.18), rgba(62, 131, 145, 0.08));
}

.session-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
}

.session-month {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
  font-weight: 700;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
  font-size: 0.78rem;
  font-weight: 800;
}

.badge.upcoming {
  background: #eaf4eb;
  color: var(--success);
}

.badge.past {
  background: #f9ebea;
  color: var(--danger);
}

.badge.today {
  background: var(--warm);
  color: #583200;
  box-shadow: 0 0 0 2px rgba(255, 169, 45, 0.25);
}

.session-title {
  margin: 0.38rem 0;
  color: var(--denim);
  font-size: 1.12rem;
}

.session-time,
.session-speaker {
  margin: 0.3rem 0;
}

.session-time {
  color: #12345c;
  font-weight: 700;
}

.session-speaker {
  color: var(--muted);
}

.session-speaker-wrap {
  margin: 0.45rem 0 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.speaker-avatar {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  border: 2px solid rgba(47, 85, 127, 0.24);
  background: var(--bg-ming-soft);
  overflow: hidden;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
}

.speaker-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.speaker-initials {
  color: var(--denim);
  font-weight: 800;
  letter-spacing: 0.03em;
  font-size: 1rem;
}

.poster-download::before {
  content: "⬇ ";
}

.session-actions {
  margin-top: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.btn {
  appearance: none;
  border: none;
  border-radius: 999px;
  padding: 0.5rem 0.88rem;
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  color: #fff;
  background: var(--denim);
}

.btn-secondary {
  color: #fff;
  background: var(--ming);
}

.btn-outline {
  color: var(--denim);
  background: #fff;
  border: 1px solid #8fa7be;
}

.countdown {
  margin-left: auto;
  min-width: 178px;
  padding: 0.45rem 0.7rem;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--warm), #ff8e24);
  color: #532f00;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  box-shadow: 0 10px 20px rgba(255, 169, 45, 0.28);
}

.countdown-label {
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.countdown-value {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.1;
  color: #2a1600;
}

.countdown-note {
  margin-top: 0.18rem;
  font-size: 0.66rem;
  font-weight: 700;
  line-height: 1.2;
  color: rgba(42, 22, 0, 0.82);
}

.recording {
  margin-top: 0.85rem;
  border-top: 1px dashed #bed0e1;
  padding-top: 0.6rem;
}

.recording h4 {
  margin: 0 0 0.45rem;
  color: var(--denim);
}

.video-wrap {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid #bdd0df;
}

.video-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.no-results {
  margin: 1rem 0;
  background: var(--warm-soft);
  border: 1px solid #f5cc88;
  color: #694100;
  border-radius: 12px;
  padding: 0.8rem;
}

.back-to-top {
  position: fixed;
  right: 0.9rem;
  bottom: 0.9rem;
  text-decoration: none;
  color: #fff;
  background: var(--denim);
  border-radius: 999px;
  padding: 0.5rem 0.75rem;
  font-size: 0.88rem;
  box-shadow: 0 8px 24px rgba(28, 43, 61, 0.24);
}

.site-footer {
  margin-top: 2rem;
  text-align: center;
  padding: 1.2rem 1rem 1.4rem;
  border-top: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
}

.site-footer p {
  margin: 0.15rem;
}

a:hover,
a:focus-visible,
button:hover,
button:focus-visible,
select:hover,
select:focus-visible,
input:hover,
input:focus-visible,
summary:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--hover-denim);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  background: var(--hover-ming);
}

@media (min-width: 760px) {
  .site-header {
    padding-top: 1.5rem;
  }

  .brand-wrap {
    grid-template-columns: 110px 1fr;
    gap: 1.3rem;
  }

  .brand-logo {
    width: 110px;
    height: 110px;
  }

  .controls {
    grid-template-columns: repeat(2, minmax(220px, 1fr));
    align-items: end;
  }

  .toggle-wrap {
    grid-column: span 2;
  }
}

@media (min-width: 980px) {
  .main-content {
    padding: 1.2rem 1rem 1.5rem;
  }

  .controls {
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 1rem;
  }

  .toggle-wrap {
    grid-column: auto;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .month-group summary {
    cursor: default;
  }
}

@media (max-width: 640px) {
  .countdown {
    width: 100%;
    margin-left: 0;
    align-items: center;
  }
}