:root { --bg:#0b1220; --card:#111a2b; --text:#e6eefc; --muted:#9fb2d9; --accent:#4da3ff; }
* { box-sizing: border-box; }
body { margin:0; font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial; background: var(--bg); color: var(--text); }
header { display:flex; justify-content:space-between; align-items:center; padding:16px 20px; background: #0e182b; position: sticky; top:0; z-index:10; border-bottom: 1px solid #1d2a44; }
h1 { margin:0; font-size: 20px; letter-spacing: .5px; }
nav a { color: var(--muted); margin-right: 14px; text-decoration:none; }
nav a:hover { color: var(--text); }
main { max-width: 1000px; margin: 20px auto; padding: 0 16px; }
.card { background: var(--card); border: 1px solid #1d2a44; border-radius: 14px; padding: 16px; box-shadow: 0 10px 20px rgba(0,0,0,.25); }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #1d2a44; }
thead th { color: var(--muted); font-weight: 600; }
input, select, button { padding: 10px 12px; border-radius: 8px; border: 1px solid #2b3d63; background:#0e172a; color: var(--text); }
label { display:block; font-size: 13px; color: var(--muted); margin-bottom: 8px; }
.grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 12px; margin-bottom: 12px; }
.buttons { margin-top: 12px; }
.button, button { background: linear-gradient(180deg, #3b8cff, #2b6edb); border: none; cursor: pointer; }
.button:hover, button:hover { filter: brightness(1.05); }
.flash .flash-success { background: #14301a; border: 1px solid #2d6a36; padding: 8px 12px; border-radius: 8px; margin: 8px 0; }
.flash .flash-error { background: #3a1717; border:1px solid #7a2e2e; padding: 8px 12px; border-radius: 8px; margin: 8px 0; }
.hint { color: var(--muted); margin: 8px 0 12px; }
.sig { background: #0a0f1a; border: 1px dashed #2b3d63; border-radius: 10px; display:block; }