/* General Styles */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #f4f7f9;
    --sidebar-bg: #ffffff;
    --card-bg: #ffffff;
    --text-color: #333;
    --text-light: #7f8c8d;
    --border-color: #e9ecef;
    --shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

/* Login Page Styles */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-box {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.login-box p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    box-sizing: border-box;
}

.btn {
    padding: 12px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    width: 100%;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}
.btn-primary:hover {
    background-color: #2980b9;
}

.error-message {
    color: #e74c3c;
    margin-top: 15px;
    height: 20px;
}

/* Dashboard Layout */
.dashboard-layout {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    padding: 20px;
    box-shadow: 2px 0 10px rgba(0,0,0,0.05);
    z-index: 10;
}

.sidebar-header h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 40px;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav li a {
    display: block;
    padding: 15px 20px;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 10px;
    font-weight: 500;
}

.sidebar-nav li.active a, .sidebar-nav li a:hover {
    background-color: var(--secondary-color);
    color: white;
}

.sidebar-footer {
    margin-top: auto;
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-color);
}
.btn-secondary:hover {
    background-color: #dcdfe3;
}

.main-content {
    flex-grow: 1;
    padding: 30px;
    overflow-y: auto;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.stat-card h3 {
    margin: 0 0 10px 0;
    color: var(--text-light);
    font-size: 16px;
}

.stat-card p {
    margin: 0;
    font-size: 32px;
    font-weight: bold;
    color: var(--primary-color);
}

.token-card p {
    color: var(--secondary-color);
}

/* Charts Grid */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.chart-container {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.chart-container h3 {
    margin-top: 0;
    text-align: center;
}

/* 手机验证码登录样式 */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.loading {
    display: none;
    text-align: center;
    margin-top: 1rem;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-right: 10px;
}