:root {
    --bg-base: #121212;
    --bg-surface: #1e1e1e;
    --bg-surface-hover: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #9e9e9e;
    --border-color: #333333;
    --accent: #ff9800;
    --accent-hover: #f57c00;
    --error: #cf6679;
    --success: #03dac6;
    
    --radius-sm: 4px;
    --radius-md: 6px;
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 1rem;
    --spacing-4: 1.5rem;
    --spacing-5: 2rem;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--spacing-3);
    font-size: clamp(1rem, 1.5vw, 1.125rem);
}

.container {
    width: 100%;
    max-width: 480px;
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-4);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-3);
}

.header-titles {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
}

h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.github-link {
    color: var(--text-secondary);
    transition: color 0.15s ease;
    display: flex;
    align-items: center;
    padding: var(--spacing-1);
    border-radius: var(--radius-sm);
}

.github-link:hover {
    color: var(--text-primary);
}

.github-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.status-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-3);
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-weight: 500;
    font-size: 0.875rem;
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    transition: background-color 0.2s ease;
}

.dot[data-state="active"] {
    background-color: var(--success);
}

.dot[data-state="error"] {
    background-color: var(--error);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-2);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    justify-content: space-between;
}

.value-display {
    color: var(--text-secondary);
}

.dropdown {
    background-color: var(--bg-base);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-2);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-family: inherit;
    width: 100%;
    cursor: pointer;
    appearance: none;
}

.dropdown:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: transparent;
    cursor: pointer;
}

input[type="range"]:focus {
    outline: none;
}

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

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 16px;
    width: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    margin-top: -6px;
    border: none;
    transition: background-color 0.1s ease;
}

input[type="range"]:focus-visible::-webkit-slider-thumb {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

input[type="range"]::-webkit-slider-thumb:hover {
    background: var(--accent);
}

button {
    background-color: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

button:hover {
    background-color: var(--bg-surface-hover);
    border-color: var(--text-secondary);
}

button[data-primary="true"] {
    background-color: var(--accent);
    color: #000;
    border: none;
}

button[data-primary="true"]:hover {
    background-color: var(--accent-hover);
}

button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

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

#stop-audio-btn {
    background-color: var(--error);
    color: #000;
    border: none;
    animation: fade-in 0.2s ease;
}

#stop-audio-btn:hover {
    background-color: #e57373;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.log-container {
    font-family: monospace;
    font-size: 0.75rem;
    background-color: var(--bg-base);
    border: 1px solid var(--border-color);
    padding: var(--spacing-2);
    border-radius: var(--radius-sm);
    height: 100px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.footer-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    text-decoration: underline;
    font-size: 0.75rem;
    padding: 0;
    margin-top: var(--spacing-1);
}

.footer-btn:hover {
    background: transparent;
    color: var(--text-primary);
    border: none;
}

.modal {
    position: relative;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0;
    max-width: 500px;
    width: 90%;
    color: var(--text-primary);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.8);
    font-family: var(--font-sans);
    overflow: hidden;
    z-index: 1001;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(6px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: transparent;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-3) var(--spacing-4);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-surface-hover);
}

.modal-header h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
}

#close-modal-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    padding: 0;
    line-height: 1;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

#close-modal-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface-hover);
}

.modal-body {
    padding: var(--spacing-4);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.modal-body p {
    margin: 0;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    margin-bottom: var(--spacing-2);
}

.form-group label {
    font-size: 0.875rem;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input {
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-2);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    width: 100%;
}

.form-group input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.h-captcha {
    display: flex;
    justify-content: center;
    margin: var(--spacing-2) 0;
}

#submit-suggest-btn {
    width: 100%;
}

.form-result {
    font-size: 0.875rem;
    text-align: center;
    min-height: 20px;
    margin-top: var(--spacing-1);
}

.modal-body .signature {
    text-align: right;
    font-style: italic;
    color: var(--text-primary);
    margin-top: var(--spacing-2);
}

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