* {
  box-sizing: border-box;
}

:root {
  --bg: #f5f7fb;
  --panel-bg: rgb(232, 240, 250);
  --brand: hsl(213 77% 41%);
  --ink: #111827;
  --panel-border: #8cb3d9;
}

body {
  margin: 0;
  background-color: var(--bg, #f0f0f0);
  color: var(--ink, #1f2937);
  font-family: "Manrope", sans-serif;
  line-height: 1.5;
}

h1,
h2,
h3 {
  font-family: "Bebas Neue", sans-serif;
  letter-spacing: 0.8pt;
  text-align: left;
}

h1 {
  font-size: clamp(2rem, 6vw, 3.2rem);
  color: #0f3d8a;
  color: color(srgb 0.12 0.29 0.62 / 0.95);
  margin-bottom: 0.25rem;
}

.page-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background-color: rgba(242, 247, 255, 0.95);
  border-bottom: 3px solid #b7cde4;
  margin-top: 0;
  margin-right: auto;
  margin-bottom: 1rem;
  margin-left: auto;
  padding: 1rem 6vw 0.75rem 6vw;
}

header nav a {
  color: var(--link-ink, #123a6b);
}

nav a {
  display: inline-block;
  text-decoration: none;
  margin: 0.3rem 0.35rem 0.3rem 0;
  padding: 0.45em 0.8em 0.45em 0.8em;
  border-radius: 0.35rem;
  background-color: #dcecff;
  background-color: color-mix(in srgb, #93c5fd 35%, white 63%);
}

a[href^="#"] {
  border: 1px solid #9bbad9;
}

nav a:hover {
  background-color: #c6dfff;
  text-decoration: underline;
}

nav a:active {
  background-color: #a8cbf7;
}

main {
  width: 88%;
  max-width: 24cm;
  min-width: 280px;
  margin: 0 auto;
}

main > section {
  transition: transform 0.2s ease;
}

.panel {
  position: relative;
  background-color: var(--panel-bg, #e9f0f8);
  margin: 1rem auto 1.5rem auto;
  padding-top: 1rem;
  padding-right: 1rem;
  padding-bottom: 1.2rem;
  padding-left: 1rem;
  border-style: solid;
  border-color: var(--panel-border, #7aa5cf);
  border-width: 2px;
  border-radius: 0.75rem;
}

section.panel {
  box-shadow: 0 6px 16px rgba(22, 58, 107, 0.12);
}

#agenda {
  background-color: hsl(194, 63%, 92%);
}

.helper-note {
  display: block;
  color: orange;
  text-align: left;
}

.status-pill {
  display: inline;
  border: 1px solid #1d4ed8;
  border-radius: 999px;
  padding: 0.15rem 0.5rem 0.15rem 0.5rem;
  background-color: hsla(214, 89%, 74%, 0.35);
}

.hidden-note {
  display: none;
}

h2 + p {
  margin-top: 0.4rem;
}

h2 ~ ul {
  margin-top: 0.6rem;
}

.agenda-list {
  padding: 0.5rem 1.2rem 0.6rem 1.4rem;
}

.attendance-list li {
  margin-bottom: 0.35rem;
}

p:hover {
  color: rgb(35, 61, 99);
}

input[type="text"],
input[type="date"],
select,
textarea {
  width: 100%;
  max-width: 28rem;
  min-width: 12rem;
  padding: 0.35rem;
  border: 1px solid #7ea1c4;
  border-radius: 0.4rem;
  background-color: #fff;
}

button[type="submit"] {
  border: 2px solid #1f5ea8;
  background-color: color-mix(in srgb, #1f5ea8 70%, white 30%);
  color: #fff;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
}

button[type="submit"]:active {
  transform: translateY(1px);
}

.flex-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: stretch;
  gap: 1rem;
}

article.pulse-card {
  flex: 1 1 11rem;
  background-color: #fff;
  border: 2px solid #9ebde0;
  border-radius: 10px;
  padding: 0.8rem;
}

.task-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(9rem, 1fr));
  grid-auto-rows: minmax(4rem, auto);
  gap: 0.75rem;
  justify-items: stretch;
  align-items: stretch;
  margin-top: 1rem;
}

.task-item {
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid #90abc7;
  border-radius: 0.5rem;
  padding: 0.7rem;
}

.media-preview {
  width: min(20rem, 70vw);
  height: auto;
  max-width: 100%;
  min-width: 180px;
  border: 3px solid #5f84ac;
  border-radius: 0.5rem;
}

.back-to-top {
  position: fixed;
  right: 1.2rem;
  bottom: 1.2rem;
  background-color: #163a6b;
  color: #fff;
  padding: 0.4rem 0.7rem;
  border-radius: 0.4rem;
  display: inline-block;
  text-decoration: none;
}

.back-to-top:hover {
  background-color: #285c9d;
}

.panel:has(input[type="checkbox"]:checked) {
  border-color: #2f855a;
  background-color: rgb(226, 243, 234);
}

.panel h3 {
  text-decoration: underline;
  margin-bottom: 0.25rem;
}

.panel ul {
  margin-left: 1rem;
}

/* Nested selector */
.panel {
  & .helper-note {
    font-weight: 600;
  }
}

@media screen and (max-width: 900px) {
  nav a {
    margin-bottom: 0.45rem;
  }

  .task-grid {
    grid-template-columns: 1fr;
  }

  .back-to-top {
    position: static;
    margin-top: 1rem;
  }
}

@media screen and (max-width: 560px) {
  body {
    font-size: 0.95rem;
  }

  main {
    width: 94%;
    min-width: 0;
  }

  .page-header {
    position: static;
  }

  .flex-row {
    flex-direction: column;
  }
}