:root {
  --bg: #0b0f14;
  --panel: #121822;
  --text: #e6edf3;
  --muted: #9fb0c0;
  --accent: #6aa9ff;
  --danger: #ff6a6a;
  --success: #45d483;
  --border: #1f2a37;
  --shadow: 0 10px 30px rgba(0,0,0,0.45);
}
* { box-sizing: border-box; }
html, body { margin:0; padding:0; background:var(--bg); color:var(--text); font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji"; }
a { color: var(--accent); text-decoration: none; }
.container { max-width: 980px; margin: 0 auto; padding: 16px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  box-shadow: var(--shadow);
}
h1,h2,h3 { margin: 0 0 12px; }
label { display:block; margin: 10px 0 6px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="file"], select, textarea {
  width: 100%; padding: 12px 14px; background:#0d131b; color: var(--text);
  border:1px solid var(--border); border-radius: 12px;
}
textarea { min-height: 220px; }
button, .btn {
  display:inline-flex; align-items:center; gap:10px;
  padding: 12px 16px; border-radius: 12px; border:1px solid var(--border);
  background: linear-gradient(180deg, #1a2330, #121a26);
  color: var(--text); cursor:pointer; font-weight:600;
  box-shadow: var(--shadow);
}
.btn-row { display:flex; gap:12px; flex-wrap:wrap; }
.nav {
  display:flex; align-items:center; justify-content:space-between;
  padding: 12px 0; margin-bottom: 16px;
}
.nav .brand { font-weight:800; letter-spacing: .5px; }
.grid { display:grid; gap:16px; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.icon-btn {
  display:flex; flex-direction:column; align-items:flex-start; gap:8px;
  padding:16px; border-radius:16px; background:#0f1620; border:1px solid var(--border);
}
.icon { font-size: 28px; }
small.hint { color: var(--muted); display:block; margin-top:6px; }
.notice { padding: 12px; border-left: 4px solid var(--accent); background: #0f1625; border-radius: 6px; color: var(--muted); }
.error { border-left-color: var(--danger); background:#1a1012; }
.success { border-left-color: var(--success); background:#0e1a15; }
.footer { margin-top: 28px; color: var(--muted); font-size: 13px; text-align:center; }
@media (max-width: 480px){
  .grid { grid-template-columns: 1fr; }
}