/* --- CSS Variables & A11y Tokens --- */
:root {
    --bg-base: #121212;
    --card-bg: #1e1e1e;
    
    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    
    --accent-primary: #3b82f6;
    --accent-primary-hover: #60a5fa;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    
    --focus-ring: #fbbf24; /* High contrast yellow for screen reader / keyboard focus */
}

/* --- Global Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, sans-serif;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-size: 18px; /* Larger base font for readability */
    line-height: 1.5;
    padding: 16px;
}

.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;
}

.visually-hidden {
    display: none;
}

/* Focus Styles for Accessibility */
*:focus {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.app-container {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Header */
.header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--accent-primary);
    text-align: center;
    padding-bottom: 10px;
    border-bottom: 2px solid #333;
}

/* Assistant Message Box */
.assistant-box {
    background-color: #2d3748;
    border-left: 5px solid var(--accent-success);
    padding: 16px;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    box-shadow: 0 4px 6px rgba(0,0,0,0.3);
}

/* Assistant Interaction Box */
.assistant-interaction-box {
    background-color: #1a202c;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #4a5568;
    margin-top: -10px;
}
.assistant-input-group {
    display: flex;
    gap: 10px;
}
.assistant-input-group input {
    flex: 1;
    font-size: 16px;
}
.assistant-input-group button {
    width: auto;
    padding: 0 20px;
    font-size: 16px;
}
#btn-ask-voice {
    font-size: 24px;
    padding: 0 15px;
}

/* Progress Bar */
#progress-container {
    margin-bottom: 10px;
}
#progress-container.hidden {
    display: none;
}
.progress-bar-bg {
    width: 100%;
    height: 20px;
    background-color: #333;
    border-radius: 10px;
    overflow: hidden;
}
.progress-bar-fill {
    height: 100%;
    width: 0%;
    background-color: var(--accent-success);
    transition: width 0.3s ease;
}

/* Wizard Cards */
.step-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #333;
}

.step-card.hidden {
    display: none;
}

.step-card h2 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

/* Buttons */
.btn {
    display: inline-block;
    text-align: center;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    cursor: pointer;
    transition: filter 0.2s;
    width: 100%;
}

.btn-large {
    padding: 16px 20px;
    font-size: 18px;
}

.btn-primary { background-color: var(--accent-primary); color: white; }
.btn-success { background-color: var(--accent-success); color: white; }
.btn-warning { background-color: var(--accent-warning); color: black; }
.btn-danger { background-color: var(--accent-danger); color: white; }

.btn:hover, .btn:focus {
    filter: brightness(1.2);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.large-input {
    width: 100%;
    padding: 12px;
    font-size: 20px;
    background-color: #121212;
    border: 2px solid #444;
    color: white;
    border-radius: 8px;
}

.large-input:focus {
    border-color: var(--accent-primary);
}

/* Info Box */
.info-box {
    background-color: #1a202c;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 16px;
    border: 1px solid #2d3748;
}
.info-box.hidden {
    display: none;
}

/* Sliders (Vertical for TalkBack compatibility) */
.slider-container {
    display: flex; 
    align-items: center; 
    gap: 15px; 
    height: 150px; 
    margin-top: 10px;
}

.slider {
    -webkit-appearance: slider-vertical; /* WebKit/Blink */
    appearance: slider-vertical;
    width: 30px;
    height: 150px;
    border-radius: 8px;
    background: #444;
    outline: none;
    cursor: pointer;
}