:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --success: #059669;
    --error: #dc2626;
    --warning: #d97706;
    --bg-primary: #fafafa;
    --bg-secondary: #f5f5f5;
    --bg-card: rgba(255, 255, 255, 0.95);
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border: rgba(0, 0, 0, 0.08);
    --shadow: rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e9f2 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* 背景装饰 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(99, 102, 241, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: 40px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Logo 和标题 */
.header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 400;
}

/* 卡片容器 */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow:
        0 4px 20px var(--shadow),
        0 1px 3px rgba(0, 0, 0, 0.03);
}

/* 步骤指示器 */
.steps {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 28px;
}

.step {
    width: 40px;
    height: 4px;
    background: #e5e7eb;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.step.active {
    background: var(--primary);
}

.step.completed {
    background: var(--success);
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

input[type="text"],
input[type="password"],
textarea {
    width: 100%;
    padding: 12px 14px;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all 0.2s ease;
    outline: none;
}

input:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: #9ca3af;
}

/* 按钮 */
.btn {
    width: 100%;
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: #f3f4f6;
    color: var(--text-primary);
    border: 1px solid #e5e7eb;
}

.btn-secondary:hover {
    background: #e5e7eb;
}

/* 消息提示 */
.message {
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message.success {
    background: rgba(5, 150, 105, 0.1);
    border: 1px solid rgba(5, 150, 105, 0.2);
    color: var(--success);
}

.message.error {
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.2);
    color: var(--error);
}

.message.warning {
    background: rgba(217, 119, 6, 0.1);
    border: 1px solid rgba(217, 119, 6, 0.2);
    color: var(--warning);
}

.message.info {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: var(--primary);
}

/* 验证结果日志 */
.log-container {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 14px;
    max-height: 180px;
    overflow-y: auto;
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
    line-height: 1.8;
    margin-top: 14px;
}

.log-container::-webkit-scrollbar {
    width: 5px;
}

.log-container::-webkit-scrollbar-thumb {
    background: #d1d5db;
    border-radius: 3px;
}

.log-line {
    color: var(--text-secondary);
}

.log-line.success {
    color: var(--success);
}

.log-line.error {
    color: var(--error);
}

/* 加载动画 */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* 大型加载动画 */
.loading-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.loading-spinner-large {
    width: 50px;
    height: 50px;
    border: 3px solid #e5e7eb;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

.loading-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    animation: pulse-text 1.5s ease-in-out infinite;
}

@keyframes pulse-text {

    0%,
    100% {
        opacity: 0.6;
    }

    50% {
        opacity: 1;
    }
}

/* 隐藏元素 */
.hidden {
    display: none !important;
}

/* 页脚 */
.footer {
    text-align: center;
    margin-top: 20px;
    padding: 12px;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.footer .tip {
    background: rgba(99, 102, 241, 0.08);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--primary);
    font-size: 0.8rem;
}

/* ==================== 管理后台样式 ==================== */

.admin-container {
    max-width: 900px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    text-align: center;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 4px;
}

.actions-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.actions-bar input {
    width: 100px;
}

.actions-bar .btn {
    width: auto;
    flex: 1;
    min-width: 100px;
    padding: 10px 16px;
    font-size: 0.875rem;
}

/* 表格 */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background: #f9fafb;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

td {
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(99, 102, 241, 0.03);
}

.status-badge {
    padding: 4px 10px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.status-badge.unused {
    background: rgba(5, 150, 105, 0.1);
    color: var(--success);
}

.status-badge.used {
    background: rgba(107, 114, 128, 0.1);
    color: var(--text-secondary);
}

/* 生成的密钥列表 */
.keys-output {
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    padding: 14px;
    margin-top: 14px;
    max-height: 260px;
    overflow-y: auto;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    line-height: 1.9;
    white-space: pre-wrap;
    word-break: break-all;
}

/* 响应式 */
@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .actions-bar {
        flex-direction: column;
    }

    .actions-bar input,
    .actions-bar .btn {
        width: 100%;
    }

    table {
        font-size: 0.75rem;
    }

    th,
    td {
        padding: 10px 12px;
    }
}