*,
*::before,
*::after {
  box-sizing: border-box;
}

*:not(dialog) {
  margin: 0;
}

* {
  font-family: "Inter", sans-serif;
}

:root {
  --bg: #0a1c22;
  --surface: #112b34;
  --surface-2: #193b47;
  --text: #e4f1f5;
  --muted: #84a3ac;
  --border: #234958;
  --shadow: rgba(3, 11, 14, 0.6);
  --primary: #f98373;
  --primary-hover: #fca79e;
  --success: #0a9e72;
  --danger: #c03830;
}

body {
  background-color: var(--bg);
  color: var(--contrast);
  font-size: 16px;
  border-color: var(--border);
}

button {
  display: flex;
  align-items: center;
  transition: all 0.3s;
  padding: 16px 24px;
  font-size: 24px;
  font-weight: bold;
  background-color: var(--primary);
  color: var(--text);
  border-radius: 16px;
  border: none;
  cursor: pointer;

  &:hover {
    background-color: var(--primary-hover);
  }

  @media screen and (max-width: 650px) {
    padding: 8px 12px;
    font-size: 16px;
  }
}

main {
  display: flex;
  align-items: center;
  flex-direction: column;
}

.section-heading {
  display: none;
}

main > .hidden {
  visibility: collapse;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 24px;
  z-index: 1;
  min-width: min(320px, calc(100vw - 32px));
  max-width: calc(100vw - 32px);
  padding: 14px 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-2);
  box-shadow: 0 20px 36px var(--shadow);
  color: var(--text);
  font-size: 16px;
  font-weight: bold;
  text-align: center;
  opacity: 0;
  transform: translate(-50%, 24px);
  transition:
    transform 0.3s ease,
    opacity 0.3s ease;
}

.toast.visible {
  opacity: 1;
  transform: translate(-50%, 0);
}