:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --secondary-color: #6c757d;
    --secondary-hover: #545b62;
    --danger-color: #dc3545;
    --danger-hover: #c82333;
    --danger-alt-color: #8b1538;
    --danger-alt-hover: #721229;
    --success-color: #28a745;
    --success-hover: #218838;
    --custom-link-color: #5865F2;
    --custom-link-hover: #4752C4;
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --border-color: #dee2e6;
    --text-color: #212529;
    --text-muted: #6c757d;
    --font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --border-radius: 0.5rem;
    --shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    --gap: 1rem;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    padding: 2rem;
}

.container {
    width: 100%;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

h1, h2 {
    margin-bottom: var(--gap);
}

h1 {
    font-size: 2rem;
}

h2 {
   font-size: 1.25rem;
   color: var(--text-muted);
}

nav {
    display: flex;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 0.5rem;
}

nav button {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    background-color: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    border-radius: 0.375rem;
}

nav button.active {
    background-color: var(--primary-color);
    color: white;
    box-shadow: 0 2px 4px rgba(0, 123, 255, 0.25);
}

section {
    display: none;
    flex-direction: column;
    gap: 1.5rem;
    padding: 2rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

section.active {
    display: flex;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-weight: 600;
}

input[type="text"], textarea, pre {
    width: 100%;
    padding: 1rem;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: #fff;
}

input[type="text"] {
     font-family: var(--font-family);
}

textarea, pre {
     font-family: "SF Mono", "Fira Code", "Courier New", monospace;
}

textarea {
    height: 12rem;
    resize: none;
    overflow-y: auto;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.rules-textarea {
    height: 20rem;
}

input[type="text"]:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

pre {
    background-color: var(--bg-color);
    white-space: pre-wrap;
    word-wrap: break-word;
}

.button-group {
    display: flex;
    gap: var(--gap);
    flex-wrap: wrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s, box-shadow 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
    box-shadow: var(--shadow);
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: var(--success-hover);
    box-shadow: var(--shadow);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
    box-shadow: var(--shadow);
}

.btn-danger-alt {
    background-color: var(--danger-alt-color);
    color: white;
}

.btn-danger-alt:hover {
    background-color: var(--danger-alt-hover);
    box-shadow: var(--shadow);
}

.btn-custom-link {
    background-color: var(--custom-link-color);
    color: white;
}

.btn-custom-link:hover {
    background-color: var(--custom-link-hover);
    box-shadow: var(--shadow);
}

.btn[disabled] {
    background-color: #ccc;
    cursor: not-allowed;
}

.btn img.icon {
    height: 1.1em;
    width: 1.1em;
    margin-right: 0.6rem;
}

.clear-btn {
    align-self: flex-start;
    margin-top: 0.5rem;
}

/* Speech Recognition Styles */
.speech-btn {
    position: relative;
    min-width: 2.5rem;
    padding: 0.5rem;
    border-radius: 50%;
    background-color: var(--success-color);
    color: white;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.speech-btn:hover {
    background-color: var(--success-hover);
    transform: scale(1.05);
}

.speech-btn.listening {
    background-color: #ff4757;
    animation: pulse 1.5s infinite;
}

.speech-btn.listening:hover {
    background-color: #ff3742;
}

 @keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(255, 71, 87, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(255, 71, 87, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(255, 71, 87, 0);
    }
}

.microphone-icon {
    width: 1.2rem;
    height: 1.2rem;
    fill: currentColor;
}

.speech-status {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    min-height: 1.2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.speech-status.listening {
    color: #ff4757;
    font-weight: 600;
}

.speech-status.processing {
    color: var(--primary-color);
    font-weight: 600;
}

.listening-indicator {
    display: inline-block;
    width: 0.5rem;
    height: 0.5rem;
    background-color: #ff4757;
    border-radius: 50%;
    animation: blink 1s infinite;
}

 @keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0.3; }
}