:root {
    --bg-color: #f8fafc;
    --surface-color: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --accent-color: #3b82f6; 
    --accent-hover: #2563eb;
    --danger-color: #ef4444;
    --success-color: #10b981;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0; background: var(--bg-color); color: var(--text-main); line-height: 1.6;
}
.main-header {
    background: var(--surface-color); padding: 12px 32px; display: flex; justify-content: space-between; align-items: center;
    border-bottom: 1px solid var(--border-color); flex-wrap: wrap; gap: 15px;
}
.logo a {
    font-size: 18px; font-weight: 600; text-decoration: none; color: var(--text-main); display: flex; align-items: center; gap: 10px;
}
.logo img { height: 28px; width: auto; display: block; }
.main-menu { display: flex; gap: 20px; flex-wrap: wrap; }
.main-menu a {
    text-decoration: none; color: var(--text-muted); font-size: 14px; font-weight: 500; transition: color 0.2s;
}
.main-menu a:hover { color: var(--text-main); }
.container { max-width: 900px; margin: 40px auto; padding: 0 20px; min-height: 65vh; }
.service-card {
    background: var(--surface-color); padding: 32px; border-radius: 8px; margin-bottom: 24px;
    border: 1px solid var(--border-color); box-shadow: 0 1px 2px rgba(0,0,0,0.02);
}
.service-card h1, .service-card h2, .service-card h3 { margin-top: 0; color: var(--text-main); font-weight: 600; letter-spacing: -0.01em; }
.service-card p { color: var(--text-muted); margin-bottom: 24px; }
.btn-primary, .btn-secondary, .btn-danger {
    display: inline-block; padding: 8px 16px; border-radius: 6px; text-decoration: none; border: 1px solid transparent;
    cursor: pointer; text-align: center; font-size: 14px; font-weight: 500; transition: all 0.2s ease;
}
.btn-primary { background: var(--accent-color); color: #fff; border-color: var(--accent-color); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-secondary { background: var(--surface-color); color: var(--text-main); border-color: var(--border-color); }
.btn-secondary:hover { background: var(--bg-color); border-color: #cbd5e1; }
.btn-danger { background: var(--surface-color); color: var(--danger-color); border-color: var(--border-color); }
.btn-danger:hover { background: #fee2e2; border-color: #fca5a5; }
input[type="text"], input[type="number"], textarea {
    width: 100%; padding: 10px 14px; margin: 0; border: 1px solid var(--border-color);
    border-radius: 6px; box-sizing: border-box; font-family: inherit; font-size: 14px;
    background: var(--surface-color); color: var(--text-main); transition: all 0.2s ease;
}
input[type="text"]:focus, textarea:focus { border-color: var(--accent-color); outline: none; box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1); }
.stats-box { margin-top: 24px; padding: 16px; background: var(--bg-color); border-radius: 6px; border: 1px solid var(--border-color); font-size: 14px; color: var(--text-main); }
.day-switcher { display: flex; align-items: center; justify-content: space-between; margin-bottom: 24px; padding-bottom: 20px; border-bottom: 1px solid var(--border-color); }
.day-switcher span { font-weight: 600; font-size: 16px; min-width: 140px; text-align: center; }
.file-ops { display: flex; gap: 12px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border-color); }
ul { list-style: none; padding: 0; margin: 0; }
ul li { padding: 12px 0; border-bottom: 1px solid var(--border-color); display: flex; gap: 16px; align-items: center; }
ul li:last-child { border-bottom: none; }
.main-footer { text-align: center; padding: 32px 24px; border-top: 1px solid var(--border-color); color: var(--text-muted); font-size: 13px; background: var(--surface-color);}
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.panel { background: var(--bg-color); border: 1px solid var(--border-color); padding: 24px; border-radius: 8px; }