:root {
    --bg-main: #FFFFFF;
    --bg-secondary: #F8F9FB;
    --bg-tertiary: #F1F3F5;
    --text-primary: #1A1A2E;
    --text-secondary: #6B7280;
    --text-tertiary: #9CA3AF;
    --accent: #4F46E5;
    --accent-hover: #4338CA;
    --accent-light: rgba(79, 70, 229, 0.08);
    --success: #059669;
    --danger: #DC2626;
    --info: #0EA5E9;
    --warning: #F59E0B;
    --border: #E5E7EB;
    --border-hover: #D1D5DB;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg-main);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: #D1D5DB; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #9CA3AF; }

.main-wrap {
    position: relative;
    z-index: 1;
    padding: 20px;
    max-width: 1840px;
    margin: 0 auto;
}

/* ========== HEADER ========== */
.app-header {
    position: relative;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 24px;
    margin-bottom: 10px;
    box-shadow: var(--shadow-sm);
}

.app-header::before {
    display: none;
}

@keyframes header-glow {
    0% { background-position: 0% 0%; }
    100% { background-position: 200% 0%; }
}

.header-title {
    font-size: 22px;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.header-sub {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 2px;
    letter-spacing: 0.3px;
}

.header-stat-box {
    text-align: right;
    padding: 8px 16px;
    background: rgba(5, 150, 105, 0.06);
    border: 1px solid rgba(5, 150, 105, 0.15);
    border-radius: var(--radius-md);
}

.header-stat-label { font-size: 11px; color: var(--text-tertiary); font-weight: 500; }

.header-stat-value {
    font-size: 22px;
    font-family: 'Courier New', monospace;
    font-weight: 800;
    color: var(--success);
}

.header-settle-btn {
    background: var(--accent);
    color: white;
    border: none;
    padding: 9px 20px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.2);
}

.header-settle-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}