/* training-blue/public/style.css */
:root {
  --accent: #2563EB;
  --accent-dark: #1D4ED8;
  --bg: #FAFAFA;
  --card-bg: #FFFFFF;
  --card-border: #EBEBEB;
  --card-hover: #C7D9FC;
  --text: #1A1A1A;
  --text-muted: #999;
  --green: #00873C;
  --amber: #C68A00;
  --red: #D32F2F;
  --accent-bg: #EEF3FF;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', -apple-system, sans-serif; background: var(--bg); color: var(--text); line-height: 1.5; font-size: 13px; -webkit-font-smoothing: antialiased; }
.container { max-width: 1280px; margin: 0 auto; padding: 16px 20px; }

.topnav { position: sticky; top: 0; z-index: 100; background: rgba(250,250,250,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--card-border); padding: 10px 20px; display: flex; gap: 4px; align-items: center; }
.topnav a { display: inline-block; padding: 6px 12px; color: var(--text-muted); text-decoration: none; border-radius: 6px; font-size: 0.85em; font-weight: 500; transition: all 0.2s; }
.topnav a:hover { background: var(--card-bg); color: var(--accent); }
.topnav a.active { color: var(--accent); background: var(--accent-bg); }

.subnav { position: sticky; top: 41px; z-index: 99; background: rgba(250,250,250,0.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--card-border); padding: 6px 20px; display: flex; flex-wrap: wrap; gap: 2px; }
.subnav a { display: inline-block; padding: 4px 10px; color: var(--text-muted); text-decoration: none; border-radius: 6px; font-size: 0.72em; transition: all 0.2s; white-space: nowrap; }
.subnav a:hover { background: var(--card-bg); color: var(--accent); }

.section { margin-bottom: 24px; }
.section-title { font-size: 1.1em; font-weight: 500; color: var(--text); letter-spacing: -0.02em; padding-bottom: 6px; margin-bottom: 12px; border-bottom: 1px solid var(--card-border); }

.card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 12px; padding: 14px 18px; margin-bottom: 10px; transition: border-color 0.2s; }
.card:hover { border-color: var(--card-hover); }
.card h2, .card h3 { color: var(--accent); margin-bottom: 8px; font-size: 0.95em; font-weight: 500; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; margin-bottom: 12px; }
.stat-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 10px; padding: 12px 8px; text-align: center; transition: border-color 0.2s; }
.stat-card:hover { border-color: var(--card-hover); }
.stat-card .value { font-size: 1.35em; font-weight: 600; color: var(--accent); letter-spacing: -0.02em; }
.stat-card .label { font-size: 0.65em; font-weight: 400; color: var(--text-muted); margin-top: 2px; text-transform: uppercase; letter-spacing: 0.04em; }

table { width: 100%; border-collapse: collapse; margin: 8px 0; }
th, td { padding: 6px 10px; text-align: left; border-bottom: 1px solid var(--card-border); font-size: 0.8em; }
th { color: var(--accent); font-weight: 500; background: var(--accent-bg); font-size: 0.72em; text-transform: uppercase; letter-spacing: 0.04em; }
tr:hover td { background: #FAFAFA; }

.tag { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 0.72em; font-weight: 500; }
.tag-red { background: #FEF2F2; color: var(--red); }
.tag-amber { background: #FFFBEB; color: var(--amber); }
.tag-green { background: #F0FDF4; color: var(--green); }

.empty-state { color: var(--text-muted); font-size: 0.85em; padding: 12px 0; }

.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 12px; padding: 32px; width: 320px; text-align: center; }
.login-card input { width: 100%; padding: 10px; font-size: 15px; border: 1px solid var(--card-border); border-radius: 8px; margin-top: 16px; }
.login-card button { width: 100%; padding: 10px; margin-top: 10px; border-radius: 8px; border: none; background: var(--accent); color: white; font-size: 14px; font-weight: 500; cursor: pointer; }
.login-card button:hover { background: var(--accent-dark); }

@media (max-width: 768px) { .stat-grid { grid-template-columns: 1fr 1fr; } }