* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background-color: #f8fafc;
    color: #1e293b;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 1.5rem;
}

h1 {
    text-align: center;
    margin-bottom: 2.5rem;
    color: #0f172a;
    font-weight: 800;
    font-size: 2.5rem;
    letter-spacing: -0.5px;
}

.practice-card, .intro-card, .settings {
    background-color: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    margin-bottom: 2rem;
    border: 1px solid rgba(226, 232, 240, 0.8);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.practice-card:hover, .intro-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.07);
}

.challenge-text {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 1rem;
    color: #0f172a;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.syllables {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: 0.5rem;
    color: #3b82f6;
    font-weight: 500;
}

.translation {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: 2rem;
    color: #64748b;
    font-style: italic;
}

.result-container {
    background-color: #f1f5f9;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    min-height: 130px;
    border: 1px solid rgba(226, 232, 240, 0.5);
}

.recognition-result {
    font-size: 1.25rem;
    color: #64748b;
    margin-bottom: 1rem;
    font-style: italic;
    padding: 0.5rem;
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.7);
}

.feedback {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    min-height: 1.8rem;
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.feedback.correct {
    color: #059669;
    background-color: rgba(5, 150, 105, 0.1);
}

.feedback.incorrect {
    color: #e11d48;
    background-color: rgba(225, 29, 72, 0.1);
}

.controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.btn {
    padding: 0.875rem 1.75rem;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.08);
}

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

.record-btn {
    background-color: #ef4444;
    color: white;
}

.record-btn:hover {
    background-color: #dc2626;
}

.record-btn.recording {
    animation: pulse 1.5s infinite;
    background-color: #b91c1c;
}

.next-btn {
    background-color: #3b82f6;
    color: white;
}

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

.settings {
    background-color: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
}

.difficulty-selector {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

label {
    font-weight: 600;
    color: #0f172a;
}

select {
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    background-color: #f8fafc;
    font-size: 1rem;
    color: #1e293b;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.custom-btn {
    background-color: #10b981;
    color: white;
}

.custom-btn:hover {
    background-color: #059669;
}

.instructions {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.instructions li {
    margin-bottom: 1rem;
    line-height: 1.6;
    position: relative;
    padding-left: 0.5rem;
}

.instructions li::before {
    content: "";
    position: absolute;
    left: -1.2rem;
    top: 0.5rem;
    width: 0.5rem;
    height: 0.5rem;
    background-color: #3b82f6;
    border-radius: 50%;
}

.start-btn {
    background-color: #10b981;
    color: white;
    font-size: 1.2rem;
    padding: 1.25rem 2rem;
    margin-top: 2rem;
    width: 100%;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.start-btn:hover {
    background-color: #059669;
    transform: translateY(-3px);
    box-shadow: 0 8px 15px rgba(16, 185, 129, 0.2);
}

.back-btn {
    background-color: #64748b;
    color: white;
    margin-top: 1.25rem;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.back-btn:hover {
    background-color: #475569;
}

/* Modal styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(4px);
    overflow: auto;
}

.modal-content {
    background-color: white;
    margin: 8% auto;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
    width: 85%;
    max-width: 700px;
    position: relative;
    border: 1px solid rgba(226, 232, 240, 0.8);
    animation: modalFade 0.3s ease;
}

@keyframes modalFade {
    from {opacity: 0; transform: translateY(-20px);}
    to {opacity: 1; transform: translateY(0);}
}

.close, .close-summary {
    position: absolute;
    top: 1.5rem;
    right: 1.75rem;
    font-size: 1.8rem;
    font-weight: bold;
    color: #64748b;
    cursor: pointer;
    transition: color 0.2s ease;
}

.close:hover, .close-summary:hover {
    color: #0f172a;
}

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 0.75rem;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    border-radius: 8px;
    background-color: #f1f5f9;
    cursor: pointer;
    font-weight: 600;
    color: #64748b;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background-color: #3b82f6;
    color: white;
}

.tab-content {
    margin-bottom: 2rem;
}

textarea {
    width: 100%;
    padding: 1.25rem;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.95rem;
    resize: vertical;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 1rem;
}

.import-btn {
    background-color: #3b82f6;
    color: white;
}

.cancel-btn {
    background-color: #64748b;
    color: white;
}

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

.cancel-btn:hover {
    background-color: #475569;
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
    }
    70% {
        box-shadow: 0 0 0 12px rgba(239, 68, 68, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
    }
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: #0f172a;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 1px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.score-container {
    display: flex;
    justify-content: space-between;
    margin-top: 1.25rem;
    padding-top: 0.75rem;
    border-top: 1px solid #e2e8f0;
    align-items: center;
}

.score, .timer {
    font-size: 1.1rem;
    font-weight: 600;
    color: #0f172a;
    padding: 0.5rem 1rem;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 8px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.end-btn {
    background-color: #8b5cf6;
    color: white;
}

.end-btn:hover {
    background-color: #7c3aed;
}

#summaryStats {
    background-color: #f8fafc;
    border-radius: 12px;
    padding: 2rem;
    margin: 1.5rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(226, 232, 240, 0.5);
}

#summaryStats .stat-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    background-color: white;
    border: 1px solid rgba(226, 232, 240, 0.5);
    transition: transform 0.2s ease;
}

#summaryStats .stat-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

#summaryStats .stat-label {
    font-weight: 600;
    color: #0f172a;
}

#summaryStats .stat-value {
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
}

#summaryStats .stat-value.good {
    color: #059669;
    background-color: rgba(5, 150, 105, 0.1);
}

#summaryStats .stat-value.bad {
    color: #e11d48;
    background-color: rgba(225, 29, 72, 0.1);
}

#summaryStats .summary-title {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    color: #3b82f6;
    font-weight: 700;
    letter-spacing: -0.5px;
}

@media (max-width: 600px) {
    .practice-card {
        padding: 1.5rem;
    }
    
    .challenge-text {
        font-size: 1.5rem;
    }
    
    .controls {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

.footer {
    text-align: center;
    margin-top: 2.5rem;
    padding: 1.5rem;
    color: #64748b;
    font-size: 0.95rem;
    background-color: white;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(226, 232, 240, 0.8);
}

h2 {
    font-size: 1.8rem;
    color: #0f172a;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -0.5px;
}