@font-face {
  font-family: "Roboto";
  src: url("./fonts/Roboto.ttf") format("truetype");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  color-scheme: dark;
  font-family: "Roboto", Arial, Helvetica, sans-serif;
  background: #111111;
  color: #ffffff;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

.background-video {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  object-fit: cover;
  object-position: center;
  background: #111111;
  pointer-events: none;
}

main {
  position: relative;
  display: grid;
  place-items: center;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  padding: max(16px, env(safe-area-inset-top), env(safe-area-inset-bottom))
    max(16px, env(safe-area-inset-left), env(safe-area-inset-right));
}

.title-stack {
  position: relative;
  max-width: 100%;
}

.title-panel {
  max-width: 100%;
  padding: clamp(10px, 1.7vw, 24px) clamp(14px, 2.6vw, 35px);
  background: rgba(50, 50, 50, 0.55);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
}

.subtitle-panel {
  position: absolute;
  top: calc(100% + clamp(6px, 0.8vw, 10px));
  left: 50%;
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100vw - 32px);
  margin: 0;
  padding: 6px 12px;
  background: rgba(50, 50, 50, 0.55);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  font-size: clamp(0.55rem, 1.45vw, 1.4rem);
  line-height: 1.4;
  letter-spacing: 0.06em;
  text-align: center;
  white-space: nowrap;
}

h1 {
  margin: 0;
  font-family: "Roboto", Arial, sans-serif;
  font-size: clamp(2.25rem, 10vw, 10rem);
  font-weight: 400;
  line-height: 1;
  letter-spacing: 0.035em;
  text-align: center;
  white-space: nowrap;
}

.sound-panel {
  position: fixed;
  z-index: 10;
  right: max(20px, env(safe-area-inset-right));
  bottom: max(20px, env(safe-area-inset-bottom));
  display: grid;
  grid-template-columns: auto minmax(80px, 160px) 4ch;
  align-items: center;
  gap: 12px;
  max-width: calc(100% - 40px);
  padding: 0;
  background: transparent;
  color: #ffffff;
  font-size: 14px;
  letter-spacing: 0.06em;
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.8);
}

.sound-panel button {
  min-width: 64px;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  text-shadow: inherit;
  cursor: pointer;
}

.sound-panel input {
  width: 100%;
  min-width: 0;
  height: 28px;
  margin: 0;
  accent-color: #ffffff;
  cursor: pointer;
}

.sound-panel input:focus-visible,
.sound-panel button:focus-visible {
  outline: 2px solid #ffffff;
  outline-offset: 4px;
}

#sound-status {
  grid-column: 1 / -1;
  letter-spacing: 0;
}

#sound-status:empty {
  display: none;
}