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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Noto Sans Hebrew', 'Arial Hebrew', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

body[dir="rtl"] {
    direction: rtl;
}

body[dir="ltr"] {
    direction: ltr;
}

/* RTL support for text areas and inputs */
[dir="auto"] {
    direction: auto;
}

[dir="ltr"] {
    direction: ltr;
    text-align: left;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.1em;
    opacity: 0.9;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: #4CAF50;
    color: white;
}

.btn-primary:hover {
    background: #45a049;
}

.btn-secondary {
    background: white;
    color: #667eea;
}

.btn-secondary:hover {
    background: #f0f0f0;
}

.btn-nav {
    background: rgba(255,255,255,0.9);
    color: #667eea;
    min-width: 120px;
}

.btn-flip {
    background: #ff9800;
    color: white;
    font-size: 18px;
    min-width: 150px;
}

.btn-flip:hover {
    background: #f57c00;
}

.btn-easy {
    background: #2e7d32;
    color: white;
}

.btn-easy:hover {
    background: #1b5e20;
}

.btn-hard {
    background: #c62828;
    color: white;
}

.btn-hard:hover {
    background: #b71c1c;
}

.flashcard-container {
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    margin-bottom: 20px;
}

.card-counter {
    text-align: center;
    font-size: 18px;
    font-weight: 600;
    color: #667eea;
    margin-bottom: 20px;
}

.flashcard {
    width: 100%;
    height: 500px;
    perspective: 1000px;
    margin: 0 auto 30px;
    cursor: pointer;
}

.flashcard.flipped .card-inner {
    transform: rotateY(180deg);
}

.card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.card-front, .card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.card-back {
    transform: rotateY(180deg);
}

.card-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 30px;
    overflow-y: auto;
}

.card-image-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    background: white;
    border-radius: 10px;
    padding: 10px;
    min-height: 300px;
}

.card-image-container img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

.card-image-container:empty {
    display: none;
}

.card-text {
    font-size: 20px;
    line-height: 1.6;
    color: #333;
    text-align: center;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    white-space: pre-wrap; /* Preserve line breaks and wrap text */
    word-wrap: break-word; /* Break long words if needed */
    overflow-wrap: break-word;
}

.card-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transition: width 0.3s ease;
    width: 0%;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 15px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 20px;
}

.close:hover {
    color: #000;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: #666;
    font-size: 14px;
}

.form-group input[type="file"] {
    margin-top: 8px;
    width: 100%;
    padding: 8px;
}

.form-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 30px;
}

/* Export Menu Styles */
.export-menu {
    position: relative;
    display: inline-block;
}

.export-dropdown {
    right: 0;
    left: auto;
}

body[dir="rtl"] .export-dropdown {
    left: 0;
    right: auto;
}

.export-option {
    transition: background 0.2s;
}

.export-option:hover {
    background: #f0f0f0 !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }
    
    .flashcard {
        height: 400px;
    }
    
    .card-text {
        font-size: 16px;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}