* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

:root {
    --primary: #4361ee;
    --secondary: #3a0ca3;
    --accent: #4cc9f0;
    --light: #f8f9fa;
    --dark: #212529;
    --success: #4ade80;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray: #6c757d;
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--secondary);
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.app-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 25px;
    transition: var(--transition);
    margin-bottom: 20px;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--primary);
}

.search-container {
    display: flex;
    margin-bottom: 20px;
}

.search-input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #e2e8f0;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0 20px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--secondary);
}

.word-display {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: var(--light);
    border-radius: var(--border-radius);
}

.word {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 10px;
}

.phonetic {
    font-size: 1.2rem;
    color: var(--gray);
    font-style: italic;
    margin-bottom: 15px;
}

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

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--secondary);
}

.btn-secondary {
    background: var(--light);
    color: var(--dark);
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #e2e8f0;
}

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

.btn-success:hover {
    background: #22c55e;
}

.meaning-container {
    margin-top: 20px;
}

.part-of-speech {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 2px solid #e2e8f0;
}

.definition {
    margin-bottom: 15px;
    padding-left: 15px;
    border-left: 3px solid var(--accent);
}

.example {
    font-style: italic;
    color: var(--gray);
    margin-top: 5px;
    padding-left: 15px;
}

.recent-words {
    margin-top: 30px;
}

.recent-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.recent-item {
    background: var(--light);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
}

.recent-item:hover {
    background: var(--primary);
    color: white;
}

.favorites-section {
    margin-top: 30px;
}

.favorites-list {
    margin-top: 15px;
}

.favorite-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: var(--light);
    border-radius: var(--border-radius);
    margin-bottom: 10px;
}

.favorite-word {
    font-weight: 600;
}

.favorite-actions {
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--gray);
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--primary);
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--gray);
    font-size: 0.9rem;
}

.loading {
    display: none;
    text-align: center;
    padding: 20px;
}

.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary);
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.empty-state {
    text-align: center;
    padding: 30px;
    color: var(--gray);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: #e2e8f0;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    padding: 15px;
    border-radius: var(--border-radius);
    margin: 15px 0;
    text-align: center;
    display: none;
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.suggestion-item {
    background: var(--light);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.suggestion-item:hover {
    background: var(--primary);
    color: white;
}