:root {
    color-scheme: dark;
    font-family:
        "Segoe UI",
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        sans-serif;
    font-size: clamp(14px, 1.5vw, 16px);
}

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

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

body {
    display: flex;
    align-items: stretch;
    justify-content: stretch;
    background: radial-gradient(circle at center, #1a2736, #040608 75%);
    color: #f8fafc;
}

#app {
    position: relative;
    flex: 1;
    overflow: hidden;
    background: #000;
}

#slideshow {
    position: absolute;
    inset: 0;
    background: #010203;
}

.slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 1s ease-in-out;
    will-change: opacity;
    filter: saturate(108%) contrast(103%);
}

.slide.visible {
    opacity: 1;
}

.overlay.top {
    position: absolute;
    top: clamp(16px, 10vh, 96px);
    left: clamp(16px, 10vw, 120px);
    transform: none;
    display: flex;
    align-items: center;
    gap: clamp(8px, 2vw, 20px);
    z-index: 2;
}

.logo {
    display: block;
    height: clamp(24px, 5vw, 44px);
    width: auto;
    filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.6));
}

.controls {
    display: flex;
    align-items: center;
    gap: clamp(12px, 2vw, 24px);
}

#audio-toggle {
    appearance: none;
    border: none;
    width: clamp(22px, 2.5vw, 28px);
    height: clamp(22px, 2.5vw, 28px);
    padding: 0;
    cursor: pointer;
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.96);
    filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.55));
    transition:
        transform 0.2s ease,
        filter 0.2s ease,
        opacity 0.2s ease,
        color 0.2s ease;
}

#audio-toggle:hover:not(:disabled) {
    transform: scale(1.05);
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.7));
}

#audio-toggle:focus-visible {
    transform: scale(1.05);
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.75));
    outline: 2px solid rgba(255, 255, 255, 0.6);
    outline-offset: 4px;
}

#audio-toggle:disabled {
    cursor: wait;
    opacity: 0.7;
}

#audio-toggle.is-paused {
    color: rgba(200, 210, 220, 0.85);
    opacity: 0.75;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.45));
}

#audio-toggle.is-playing .icon {
    animation: pulse 2.4s ease-in-out infinite;
}

#audio-toggle.is-paused:hover:not(:disabled),
#audio-toggle.is-paused:focus-visible {
    opacity: 0.8;
    filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.6));
}

#audio-status {
  min-height: 1.2em;
  font-size: clamp(12px, 1.1vw, 16px);
  letter-spacing: 0.05em;
  color: rgba(241, 245, 249, 0.85);
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.6);
  margin-left: clamp(10px, 1.5vw, 18px);
  opacity: 0;
  transition: opacity 0.6s ease;
}

#audio-status.is-visible {
  opacity: 1;
}

.icon {
    width: 100%;
    height: 100%;
    stroke: currentColor;
    fill: none;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition:
        transform 0.2s ease,
        opacity 0.2s ease;
}

@keyframes pulse {
    0%,
    100% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.08);
        opacity: 0.82;
    }
}

@media (max-width: 768px) {
    .overlay.top {
        flex-direction: column;
        align-items: center;
        gap: 12px;
        text-align: center;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: min(90vw, 320px);
    }

    .logo {
        align-self: center;
        width: clamp(140px, 60vw, 200px);
        height: auto;
        max-width: 100%;
    }

    .controls {
        flex-direction: column;
        gap: 10px;
    }

    #audio-toggle {
        width: clamp(32px, 12vw, 44px);
        height: clamp(32px, 12vw, 44px);
    }

    #audio-status {
        margin-left: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .slide {
        transition-duration: 0.01ms !important;
    }

    #audio-toggle {
        transition: none;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}