/* 后路OJ 全局样式 - 暗色科技风 */

:root {
    --bg: #0d1117;
    --bg-secondary: #161b22;
    --card-bg: #161b22;
    --border: #30363d;
    --text: #c9d1d9;
    --text-secondary: #8b949e;
    --primary: #58a6ff;
    --hover-bg: rgba(255,255,255,0.03);
    --table-header-bg: rgba(255,255,255,0.02);
    --input-bg: #0d1117;
    --primary-color: #58a6ff;
    --accent-color: #79c0ff;
    --ac-color: #3fb950;
}

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

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

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

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

/* 导航栏 */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 32px;
}

.nav-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}

.nav-logo:hover {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    flex: 1;
}

.nav-menu li a {
    padding: 8px 12px;
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--text);
    background: var(--hover-bg);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-user .user-name {
    color: var(--text);
    font-size: 14px;
    text-decoration: none;
}

.nav-user .user-name:hover {
    color: var(--primary);
}

.nav-user .btn-admin,
.nav-user .btn-logout {
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 6px;
    background: var(--hover-bg);
}

.nav-user .btn-admin:hover,
.nav-user .btn-logout:hover {
    color: var(--text);
}

.nav-user .btn-login {
    background: var(--primary);
    color: #fff;
    padding: 8px 16px;
    border-radius: 6px;
    text-decoration: none;
    font-size: 14px;
}

.nav-user .btn-login:hover {
    opacity: 0.9;
}

/* 主内容 */
.main-content {
    min-height: calc(100vh - 56px - 60px);
}

/* 页脚 */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 13px;
    border-top: 1px solid var(--border);
    margin-top: 40px;
}

/* 通用卡片 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
}

/* 状态颜色 */
.status-waiting, .status-judging { color: #ffa500; }
.status-ac { color: #3fb950; }
.status-wa, .status-tle, .status-mle, .status-re { color: #f85149; }
.status-ce { color: #a855f7; }
.status-se { color: #8b949e; }

/* 难度标签 */
.diff { padding: 2px 8px; border-radius: 4px; font-size: 12px; }
.diff-入门 { background: rgba(63, 185, 80, 0.15); color: #3fb950; }
.diff-普及 { background: rgba(168, 85, 247, 0.15); color: #a855f7; }
.diff-提高 { background: rgba(248, 81, 73, 0.15); color: #f85149; }