:root {
    --primary: #4a6fa5;
    --primary-light: #e6f0ff;
    --text: #2b2d42;
    --text-light: #6c757d;
    --background: #ffffff;
    --card-bg: #f8f9fa;
    --border: #e9ecef;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    --error: #e63946;
    --part-of-speech: #6c757d;
}

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

body {
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    color: #000000;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-light);
    font-size: 1rem;
}

/* Tool Container */
.tool-container {
    background: var(--background);
    border-radius: 10px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    border: 1px solid var(--border);
}

/* Input Section */
.input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

#word-input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}

#word-input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0 1.5rem;
    cursor: pointer;
    transition: background 0.2s;
}

.search-btn:hover {
    background: #3a5a8a;
}

/* Results */
.results {
    margin-top: 1.5rem;
    display: none;
}

.synonym-card {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.2rem;
    border: 1px solid var(--border);
}

.word-header {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    margin-bottom: 0.8rem;
    flex-wrap: wrap;
}

.original-word {
    font-weight: 600;
    color: var(--primary);
}

.word-type {
    color: var(--part-of-speech);
    font-size: 0.85rem;
    font-style: italic;
}

.synonyms-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.synonym {
    background: white;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.synonym:hover {
    background: var(--primary-light);
}

.synonym-type {
    color: var(--part-of-speech);
    font-size: 0.7rem;
    font-style: italic;
}

/* Loading & Error States */
.loader, .error-message {
    text-align: center;
    margin: 1rem 0;
    display: none;
}

.loader-spinner {
    border: 3px solid var(--primary-light);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 24px;
    height: 24px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

.error-message {
    color: var(--error);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}