:root {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --primary-color: #64ffda;
    --secondary-color: #333;
    --accent-red: #ff5252;
    --accent-green: #69f0ae;
    --card-bg: #1e1e1e;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

#app {
    width: 100%;
    max-width: 480px;
    padding: 20px;
    text-align: center;
}

/* Landing Screen */
#landing-screen {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.role-selection {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.btn-large {
    background-color: var(--card-bg);
    border: 2px solid var(--secondary-color);
    border-radius: 12px;
    padding: 20px;
    color: var(--text-color);
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: transform 0.1s, border-color 0.2s;
}

.btn-large:active, .btn-large:focus {
    transform: scale(0.98);
    border-color: var(--primary-color);
    outline: none;
}

.btn-large.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 12px rgba(100, 255, 218, 0.35);
}

.icon {
    font-size: 2rem;
}

/* Inputs */
.room-input-container {
    margin-top: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    text-align: left;
}

label {
    font-size: 0.9rem;
    color: #aaa;
}

input[type="text"] {
    background-color: var(--card-bg);
    border: 1px solid var(--secondary-color);
    padding: 15px;
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1.2rem;
    width: 100%;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.hint {
    font-size: 0.8rem;
    color: #666;
}

.segmented {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 8px;
}

.seg-btn {
    padding: 10px 12px;
    border-radius: 8px;
    border: 1px solid var(--secondary-color);
    background: var(--card-bg);
    color: var(--text-color);
    font-weight: 600;
    cursor: pointer;
}

.seg-btn.active {
    border-color: var(--primary-color);
    color: #000;
    background: var(--primary-color);
}

/* Monitor Screen */
#monitor-screen {
    display: flex;
    flex-direction: column;
    height: 90vh;
    justify-content: space-between;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.header-left {
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: flex-start;
}

.app-version {
    font-size: 0.8rem;
    color: #9e9e9e;
    letter-spacing: 0.02em;
}

.last-cry {
    font-size: 0.85rem;
    color: #9e9e9e;
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--secondary-color);
}

.status-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: #9e9e9e;
}

.status-text {
    white-space: nowrap;
}

.connected { background-color: var(--accent-green); box-shadow: 0 0 10px var(--accent-green); }
.disconnected { background-color: var(--accent-red); }
.waiting { background-color: #ffcc00; box-shadow: 0 0 10px rgba(255, 204, 0, 0.5); }

/* Buttons */
.btn-primary, .btn-secondary, .btn-danger {
    padding: 15px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    width: 100%;
    margin-top: 10px;
}

.btn-primary { background-color: var(--primary-color); color: #000; }
.btn-secondary { background-color: var(--secondary-color); color: var(--text-color); }
.btn-danger { background-color: transparent; border: 1px solid var(--accent-red); color: var(--accent-red); }

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-danger:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Visualizer */
.visualizer-container {
    width: 100%;
    margin: 16px 0 24px;
}

.meter-background {
    width: 100%;
    height: 18px;
    background-color: var(--secondary-color);
    border-radius: 9px;
    position: relative;
    overflow: hidden;
    margin-bottom: 10px;
}

.meter-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(to right, #69f0ae, #ffcc00, #ff5252);
    transition: width 0.1s ease;
}

/* Dim Overlay */
#dim-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: #000000;
    opacity: 0.98;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #444; /* Subtle text */
    pointer-events: auto; /* Ensure taps register */
    touch-action: manipulation;
}

/* VAD Controls */
.control-group {
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    margin: 18px 0;
    text-align: left;
}

.status-message {
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 20px;
    min-height: 1.5em;
    color: var(--accent-green);
    transition: color 0.3s;
}

input[type=range] {
    width: 100%;
    margin: 10px 0;
    background: transparent;
    -webkit-appearance: none;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    margin-top: -8px; 
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: var(--secondary-color);
    border-radius: 2px;
}

.hidden { display: none !important; }

#child-controls,
#parent-controls {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

@media (max-height: 700px) {
    #monitor-screen {
        height: 100vh;
    }

    header {
        margin-bottom: 12px;
    }

    #child-controls,
    #parent-controls {
        gap: 12px;
    }

    .visualizer-container {
        margin: 8px 0 12px;
    }

    .control-group {
        margin: 12px 0;
        padding: 12px;
    }

    .btn-primary, .btn-secondary, .btn-danger {
        padding: 12px 20px;
    }
}

/* Debug Panel */
#debug-panel {
    margin-top: 10px;
    padding: 8px 10px;
    border: 1px solid #333;
    border-radius: 6px;
    font-size: 0.75rem;
    color: #9e9e9e;
    text-align: left;
    background: rgba(0, 0, 0, 0.35);
}