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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background 0.3s, color 0.3s;
    line-height: 1.6;
}

.light-theme {
    --bg: #f0f4f8;
    --text: #1a202c;
    --card-bg: #ffffff;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --border: #e2e8f0;
    --primary: #6c63ff;
    --primary-hover: #5a52d5;
    --secondary: #718096;
    --danger: #e53e3e;
    --success: #38a169;
    --navbar-bg: #ffffff;
    --footer-bg: #2d3748;
    --footer-text: #e2e8f0;
    --hover-bg: #edf2f7;
}

.dark-theme {
    --bg: #1a202c;
    --text: #e2e8f0;
    --card-bg: #2d3748;
    --shadow: 0 10px 30px rgba(0,0,0,0.5);
    --border: #4a5568;
    --primary: #9f7aea;
    --primary-hover: #b794f4;
    --secondary: #a0aec0;
    --danger: #fc8181;
    --success: #68d391;
    --navbar-bg: #2d3748;
    --footer-bg: #1a202c;
    --footer-text: #cbd5e0;
    --hover-bg: #4a5568;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: var(--navbar-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.navbar-brand a {
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.navbar-menu {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.navbar-menu a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 20px;
    transition: background 0.3s, color 0.3s;
}

.navbar-menu a:hover,
.navbar-menu a.active {
    background: var(--primary);
    color: #fff;
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-icon {
    background: none;
    border: 2px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text);
    transition: 0.3s;
}

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

.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
}

@media (max-width: 768px) {
    .navbar-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
    }
    .navbar-menu.active {
        display: flex;
    }
    .hamburger {
        display: block;
    }
}

/* 卡片 */
.card {
    background: var(--card-bg);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 25px;
    margin-bottom: 30px;
    border: 1px solid var(--border);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

.card-header h2 {
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 按钮 */
.btn {
    padding: 10px 24px;
    border: none;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: scale(1.02);
}

.btn-secondary {
    background: var(--secondary);
    color: #fff;
}

.btn-secondary:hover {
    background: #5a6778;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-danger:hover {
    background: #c53030;
}

.btn-sm {
    padding: 6px 16px;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 14px 40px;
    font-size: 1.1rem;
}

/* 号码池 */
.pool-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 10px 0;
}

.pool-item {
    background: var(--primary);
    color: #fff;
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: 0.3s;
}

.pool-item:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.pool-input-group {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.pool-input-group input {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
}

/* 选号器 */
.selector-body {
    text-align: center;
    padding: 20px 0;
}

.number-display {
    font-size: 6rem;
    font-weight: 800;
    color: var(--primary);
    margin: 20px 0;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
}

.number-animate {
    display: inline-block;
    transition: transform 0.1s;
}

.number-animate.rolling {
    animation: roll 0.1s infinite;
}

@keyframes roll {
    0% { transform: translateY(-5px); }
    100% { transform: translateY(5px); }
}

.result-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 20px;
}

/* 图表 */
.chart-container {
    max-width: 100%;
    height: 300px;
    margin: 20px 0;
}

/* 同步 */
.sync-body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

#shareLink {
    display: flex;
    gap: 10px;
    width: 100%;
}

#shareLinkInput {
    flex: 1;
    padding: 10px;
    border: 2px solid var(--border);
    border-radius: 12px;
    background: var(--bg);
    color: var(--text);
}

/* 页脚 */
.footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 40px 0;
    text-align: center;
    margin-top: 60px;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
    margin: 0 10px;
}

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

/* 页面标题 */
.page-header {
    text-align: center;
    padding: 40px 0 20px;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text);
    margin-bottom: 10px;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--secondary);
}

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

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    background: var(--bg);
    color: var(--text);
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--primary);
    outline: none;
}

/* 提示 */
.alert {
    padding: 12px 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #c6f6d5;
    color: #22543d;
}

.alert-danger {
    background: #fed7d7;
    color: #9b2c2c;
}

/* 管理后台 */
.admin-actions {
    text-align: right;
    margin-bottom: 20px;
}

.history-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 15px;
}

.history-item {
    background: var(--hover-bg);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.9rem;
}

/* 响应式 */
@media (max-width: 600px) {
    .number-display {
        font-size: 4rem;
    }
    .page-header h1 {
        font-size: 1.5rem;
    }
}