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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans KR', sans-serif;
    background: #f5f7f0;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, #2d5016, #4a7c24);
    color: white;
    text-align: center;
    padding: 2rem 1rem 1rem;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 0.3rem;
}

header .subtitle {
    font-size: 1rem;
    opacity: 0.85;
    margin-bottom: 1.2rem;
}

header nav {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

header nav a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.95rem;
    transition: background 0.2s;
    border: 1px solid rgba(255,255,255,0.3);
}

header nav a:hover {
    background: rgba(255,255,255,0.15);
}

header nav a.nav-active {
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.6);
    font-weight: 600;
}

main {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem 1rem;
}

.section {
    display: block;
}

.section.hidden {
    display: none;
}

/* 搜索框 */
.search-box {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.search-box input {
    flex: 1;
    padding: 0.8rem 1rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

.search-box input:focus {
    border-color: #4a7c24;
}

.search-box button {
    padding: 0.8rem 1.5rem;
    background: #4a7c24;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

.search-box button:hover {
    background: #2d5016;
}

.search-hint {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 1.5rem;
}

.search-options {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.2rem;
    font-size: 0.9rem;
    color: #666;
}

.search-options label {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    cursor: pointer;
}

.search-options input[type="radio"] {
    accent-color: #4a7c24;
}

/* 浏览头部 */
.browse-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.browse-info {
    font-size: 0.9rem;
    color: #666;
}

.letter-filter {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.letter-filter select {
    padding: 0.4rem 0.8rem;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 0.9rem;
    outline: none;
}

/* 结果列表 */
.results-list {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.word-card {
    background: white;
    border-radius: 10px;
    padding: 1rem 1.2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    border-left: 4px solid #4a7c24;
    transition: transform 0.15s, box-shadow 0.15s;
}

.word-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.word-card .word-korean {
    font-size: 1.4rem;
    font-weight: 700;
    color: #2d5016;
    margin-bottom: 0.3rem;
}

.word-card .word-korean .speak-btn {
    display: inline-block;
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s, transform 0.2s;
    vertical-align: middle;
    padding: 0.1rem 0.3rem;
    border-radius: 4px;
}

.word-card .word-korean .speak-btn:hover {
    opacity: 1;
    transform: scale(1.2);
    background: #e8f5e0;
}

.speak-btn-sm {
    display: inline-block;
    background: none;
    border: none;
    font-size: 0.75rem;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity 0.2s, transform 0.2s;
    padding: 0 0.2rem;
    margin-right: 0.2rem;
    vertical-align: middle;
}

.speak-btn-sm:hover {
    opacity: 1;
    transform: scale(1.2);
}

.word-card .word-roman {
    font-size: 0.85rem;
    color: #888;
    margin-bottom: 0.4rem;
}

.word-card .word-pos {
    display: inline-block;
    background: #e8f5e0;
    color: #3d6b1a;
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    margin-bottom: 0.4rem;
    margin-right: 0.3rem;
}

.word-card .word-hanja {
    display: inline-block;
    font-size: 0.8rem;
    color: #996633;
    margin-bottom: 0.4rem;
}

.word-card .word-defs {
    margin-top: 0.3rem;
}

.word-card .word-def {
    font-size: 0.95rem;
    color: #444;
    line-height: 1.5;
    margin-bottom: 0.3rem;
    padding-left: 0.8rem;
    position: relative;
}

.word-card .word-def::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #4a7c24;
}

.word-card .word-def .lang-tag {
    display: inline-block;
    font-size: 0.65rem;
    padding: 0.05rem 0.3rem;
    border-radius: 3px;
    margin-right: 0.3rem;
    vertical-align: middle;
    font-weight: 600;
}

.word-card .word-def .lang-zh {
    background: #fff0f0;
    color: #c62828;
}

.word-card .word-def .lang-en {
    background: #e8f0fe;
    color: #1565c0;
}

.word-card .word-example {
    margin-top: 0.3rem;
    padding-left: 1.2rem;
    font-size: 0.85rem;
    color: #666;
    font-style: italic;
}

.word-card .word-conj {
    margin-top: 0.5rem;
    padding-top: 0.4rem;
    border-top: 1px dashed #eee;
    font-size: 0.8rem;
    color: #777;
}

.word-card .word-tags {
    margin-top: 0.4rem;
}

.word-card .tag {
    display: inline-block;
    background: #fff3e0;
    color: #e65100;
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 8px;
    margin-right: 0.3rem;
}

.word-card .word-source {
    margin-top: 0.4rem;
    font-size: 0.7rem;
    color: #aaa;
}

/* 加载提示 */
.loading {
    text-align: center;
    padding: 2rem;
    color: #999;
}

.loading::after {
    content: "";
    display: inline-block;
    width: 1.2rem;
    height: 1.2rem;
    border: 2px solid #ddd;
    border-top-color: #4a7c24;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: 0.5rem;
    vertical-align: middle;
}

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

/* 无结果提示 */
.no-results {
    text-align: center;
    padding: 3rem 1rem;
    color: #999;
    font-size: 1rem;
}

.no-results .no-results-icon {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.3rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.pagination button {
    padding: 0.4rem 0.8rem;
    border: 1px solid #ddd;
    background: white;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.pagination button:hover {
    background: #e8f5e0;
    border-color: #4a7c24;
}

.pagination button.active {
    background: #4a7c24;
    color: white;
    border-color: #4a7c24;
}

.pagination button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* 页脚 */
footer {
    text-align: center;
    padding: 1.5rem;
    color: #999;
    font-size: 0.85rem;
    border-top: 1px solid #eee;
}

footer a {
    color: #4a7c24;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

footer p + p {
    margin-top: 0.3rem;
}

/* 响应式 */
@media (max-width: 600px) {
    header h1 {
        font-size: 1.5rem;
    }

    header nav a {
        padding: 0.4rem 1rem;
        font-size: 0.85rem;
    }

    .browse-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .word-card .word-korean {
        font-size: 1.2rem;
    }
}