:root {
    --primary-color: #4285f4;
    --primary-hover: #3367d6;
    --secondary-color: #34a853;
    --danger-color: #ea4335;
    --background-color: #f0f0f0;
    --surface-color: #fff;
    --border-color: #ccc;
    --text-color: #333;
    --text-secondary: #666;
    --border-radius: 8px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    color-scheme: light;
}

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

[hidden] {
    display: none !important;
}

body {
    margin: 0;
    padding: var(--spacing-md) 0;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--background-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

#app {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    width: 80%;
    max-width: 1000px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 4px;
    padding: 10px 14px;
    background-color: var(--primary-color);
    color: #fff;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.2s ease;
}

button:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

button:active:not(:disabled) {
    transform: translateY(1px);
}

button:disabled,
input:disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(66, 133, 244, 0.5);
    outline-offset: 2px;
}

button.secondary {
    background: #e8eaed;
    color: var(--text-color);
}

button.small {
    padding: 6px 10px;
    font-size: 0.85em;
}

.icon-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.icon-button.round {
    border-radius: 50%;
    width: 40px;
    height: 40px;
    margin-left: 4px;
}

.icon-button.active {
    background-color: var(--danger-color);
}

input[type='text'],
input[type='password'],
input[type='number'],
input:not([type]),
select,
textarea {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--surface-color);
    color: var(--text-color);
}

/* --- Top bar ------------------------------------------------------------- */

.settings {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

#api-key,
#access-password {
    flex: 1 1 220px;
    max-width: 320px;
}

#config-toggle {
    margin-left: auto;
}

.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9em;
    color: var(--text-secondary);
    cursor: pointer;
}

/* --- Settings panel ------------------------------------------------------ */

#config-container {
    display: none;
    background: var(--surface-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    margin-bottom: var(--spacing-md);
}

#config-container.active {
    display: block;
}

.config-wrapper {
    display: grid;
    gap: var(--spacing-md);
    max-width: 640px;
    margin: 0 auto;
}

.setting-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm) var(--spacing-md);
}

.setting-label {
    font-size: 12px;
    font-weight: bold;
    min-width: 110px;
}

#model-input,
#voice-select,
#language-select,
#response-type-select {
    flex: 1 1 240px;
}

#fps-input {
    width: 80px;
}

#system-instruction {
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 14px;
    resize: vertical;
}

.config-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: flex-end;
}

.hint {
    color: var(--text-secondary);
    font-size: 12px;
    margin: 0;
}

/* --- Connection bar ------------------------------------------------------ */

.toolbar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: 10px;
}

#connect-button {
    padding: 10px 20px;
    background-color: var(--secondary-color);
    font-weight: bold;
}

#connect-button.connected {
    background-color: var(--danger-color);
}

.status {
    color: var(--text-secondary);
    font-size: 0.9em;
}

#clear-logs {
    margin-left: auto;
}

/* --- Conversation log ---------------------------------------------------- */

#logs-container {
    height: 320px;
    overflow-y: auto;
    margin-bottom: 10px;
    padding: 10px;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.95);
    overscroll-behavior: contain;
}

.log-entry {
    font-size: 0.9em;
    margin-bottom: 6px;
    line-height: 1.45;
    white-space: pre-wrap;
    word-break: break-word;
}

.log-entry .timestamp {
    color: #888;
    margin-right: 6px;
    font-variant-numeric: tabular-nums;
}

.log-entry .label {
    font-weight: 600;
    margin-right: 6px;
}

.log-entry.system {
    color: #080;
}

.log-entry.user {
    color: #008;
}

.log-entry.ai {
    color: #800;
}

.log-entry.error {
    color: var(--danger-color);
}

.log-entry.debug {
    display: none;
    color: var(--text-secondary);
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.8em;
}

#logs-container.show-debug .log-entry.debug {
    display: block;
}

.log-entry.streaming .text::after {
    content: '▍';
    margin-left: 2px;
    opacity: 0.6;
}

/* --- Input row ----------------------------------------------------------- */

.input-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

#message-input {
    flex: 1;
    min-width: 0;
    padding: 10px;
}

/* --- Audio meters -------------------------------------------------------- */

.audio-visualizers {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 10px 0;
}

.visualizer-container {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.visualizer-label {
    font-size: 0.8em;
    color: var(--text-secondary);
}

.visualizer {
    width: 100%;
    height: 12px;
    background-color: #eee;
    border-radius: 4px;
    overflow: hidden;
}

.audio-bar {
    height: 100%;
    width: 0%;
    background-color: var(--primary-color);
    transition: width 0.08s linear;
}

#input-audio-visualizer .audio-bar {
    background-color: var(--secondary-color);
}

/* --- Camera -------------------------------------------------------------- */

#video-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 480px;
    z-index: 100;
}

#video-container video {
    width: 100%;
    display: block;
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    background: #000;
}

.video-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 6px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#video-container:hover .video-controls,
#video-container:focus-within .video-controls {
    opacity: 1;
}

#stop-video {
    background: var(--danger-color);
}

#flip-camera {
    background: rgba(0, 0, 0, 0.5);
}

#frame-preview {
    position: absolute;
    bottom: 4px;
    right: 4px;
    width: 120px;
    height: 90px;
    border: 2px solid rgba(66, 133, 244, 0.8);
    border-radius: 4px;
    background: #000;
    cursor: zoom-in;
    transition: all 0.3s ease;
}

#frame-preview.enlarged {
    width: 100%;
    height: auto;
    right: 0;
    bottom: 0;
    cursor: zoom-out;
}

/* --- Screen share -------------------------------------------------------- */

#screen-container {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 480px;
    height: 270px;
    background: #000;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
}

#screen-preview {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

#screen-container .close-button {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.55);
    opacity: 0;
    transition: opacity 0.3s ease;
}

#screen-container:hover .close-button,
#screen-container .close-button:focus-visible {
    opacity: 1;
}

/* --- Small screens ------------------------------------------------------- */

@media (max-width: 768px) {
    body {
        padding: 0;
    }

    #app {
        width: 100%;
        min-height: 100vh;
        border-radius: 0;
        padding: var(--spacing-sm);
    }

    #config-container {
        position: fixed;
        inset: 0;
        z-index: 1000;
        overflow-y: auto;
        border-radius: 0;
        display: block;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

    #config-container.active {
        transform: translateX(0);
    }

    #logs-container {
        height: 45vh;
    }

    .input-controls {
        position: sticky;
        bottom: 0;
        background: var(--surface-color);
        padding: var(--spacing-sm) 0;
        flex-wrap: wrap;
    }

    #message-input {
        flex-basis: 100%;
    }

    #video-container {
        width: 60%;
        bottom: 8px;
        right: 8px;
    }

    #screen-container {
        width: calc(100% - 16px);
        height: 40vh;
        top: 8px;
        right: 8px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }
}