:root {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #3b82f6;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --border-radius: 12px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 800px;
}

h1, h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.view {
    animation: fadeIn 0.3s ease-in-out;
}

.hidden {
    display: none !important;
}

/* Setup View */
#setup-view {
    text-align: center;
    margin-top: 50px; /* Reduced top margin */
}

#stats-bar {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 0 auto 20px auto; /* Center horizontally */
    font-size: 1.2rem;
    background-color: var(--card-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    width: fit-content; /* Only take necessary width */
}

#stats-bar span {
    color: var(--text-color);
}

#stats-bar b {
    color: var(--accent-color);
}

input[type="file"] {
    display: none;
}

.file-upload-btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: white;
    padding: 12px 24px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.2s, background-color 0.2s;
}

.file-upload-btn:hover {
    transform: translateY(-2px);
    background-color: #2563eb;
}

/* Cards Grid */
.cards-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.category-card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    min-height: 60px; /* Ensure consistent height */
}

.category-card:hover {
    border-color: var(--danger-color);
    background-color: rgba(239, 68, 68, 0.1);
}

/* Question Cards */
.question-card {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: var(--border-radius);
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.callout {
    padding: 15px;
    border-left: 4px solid;
    margin-bottom: 15px;
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.05);
}

.callout-topic {
    border-color: var(--warning-color);
}
.callout-topic::before {
    content: "Zagadnienie";
    display: block;
    font-size: 0.8rem;
    color: var(--warning-color);
    margin-bottom: 5px;
    text-transform: uppercase;
    font-weight: bold;
}

.callout-category {
    border-color: var(--danger-color);
}
.callout-category::before {
    content: "Kategoria";
    display: block;
    font-size: 0.8rem;
    color: var(--danger-color);
    margin-bottom: 5px;
    text-transform: uppercase;
    font-weight: bold;
}

.callout-question {
    border-color: var(--accent-color);
    font-size: 1.1rem;
    font-weight: 600;
}
.callout-question::before {
    content: "Pytanie";
    display: block;
    font-size: 0.8rem;
    color: var(--accent-color);
    margin-bottom: 5px;
    text-transform: uppercase;
    font-weight: bold;
}

.callout-answer {
    border-color: var(--success-color);
    margin-top: 20px;
    white-space: pre-wrap; /* Preserve newlines */
}
.callout-answer::before {
    content: "Odpowiedź";
    display: block;
    font-size: 0.8rem;
    color: var(--success-color);
    margin-bottom: 5px;
    text-transform: uppercase;
    font-weight: bold;
}

.btn {
    background-color: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: background-color 0.2s;
}

.btn:hover {
    background-color: #2563eb;
}

.reveal-btn {
    width: 100%;
    margin-top: 10px;
    background-color: #4b5563;
}
.reveal-btn:hover {
    background-color: #374151;
}

#restart-btn {
    display: block;
    margin: 40px auto;
    width: 200px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.meta-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.meta-row .callout {
    flex: 1;
    margin-bottom: 0;
}

/* Custom Checkbox */
.mark-done-btn {
    position: relative;
    display: inline-block;
    width: 30px;
    height: 30px;
    cursor: pointer;
}

.mark-done-btn input {
    opacity: 0;
    width: 0;
    height: 0;
}

.checkmark {
    position: absolute;
    top: 0;
    left: 0;
    height: 30px;
    width: 30px;
    background-color: #333;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    color: transparent;
    transition: all 0.2s;
    border: 2px solid #555;
}

.mark-done-btn:hover .checkmark {
    background-color: #444;
}

.mark-done-btn input:checked ~ .checkmark {
    background-color: var(--success-color);
    border-color: var(--success-color);
    color: white;
}

/* Card Done State */
.card-done {
    opacity: 0.6;
    border: 1px solid var(--success-color);
}