:root {
    --blue:   #1456a0;
    --blue-d: #0e3c70;
    --red:    #c0392b;
    --ink:    #1f2733;
    --muted:  #667085;
    --line:   #e3e8ef;
    --bg:     #f5f7fa;
    --ok:     #1f9d55;
    --warn:   #b7791f;
    --radius: 10px;
}
* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.5;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Top bar */
.topbar {
    display: flex; align-items: center; gap: 1.5rem;
    flex-wrap: wrap;
    background: linear-gradient(90deg, var(--blue-d), var(--blue));
    color: #fff; padding: .7rem 1.2rem;
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; font-size: 1.05rem; }
.brand .logo { font-size: 1.2rem; }
.mainnav { display: flex; gap: .25rem; flex: 1; flex-wrap: wrap; }
.mainnav a {
    color: #eaf2fb; padding: .35rem .7rem; border-radius: 6px; font-size: .92rem;
}
.mainnav a:hover { background: rgba(255,255,255,.15); text-decoration: none; }
.userbox { display: flex; align-items: center; gap: .7rem; font-size: .88rem; }
.userbox small { opacity: .8; }

.container { max-width: 1080px; margin: 1.5rem auto; padding: 0 1.2rem; }
.sitefoot { text-align: center; color: var(--muted); padding: 2rem 1rem; }

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.15rem; margin: 1.5rem 0 .6rem; }

/* Cards / stat tiles */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap: 1rem; }
.card {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1rem 1.1rem;
}
.stat { font-size: 2rem; font-weight: 700; color: var(--blue); }
.stat-label { color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .03em; }

/* Panels */
.panel {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.2rem; margin-bottom: 1.2rem;
}

/* Tables */
.table-wrap { overflow-x: auto; background:#fff; border:1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { padding: .6rem .75rem; text-align: left; border-bottom: 1px solid var(--line); }
th { background: #f0f4f9; font-weight: 600; white-space: nowrap; }
tbody tr:hover { background: #f8fafc; }
td.actions { white-space: nowrap; }

/* Forms */
form.stack { display: grid; gap: .9rem; max-width: 620px; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: .9rem; }
label { display: block; font-weight: 600; font-size: .85rem; margin-bottom: .25rem; }
input, select, textarea {
    width: 100%; padding: .55rem .65rem; border: 1px solid #cdd5df; border-radius: 8px;
    font: inherit; background: #fff;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--blue); border-color: var(--blue); }
textarea { min-height: 70px; resize: vertical; }
.hint { color: var(--muted); font-size: .8rem; margin-top: .2rem; }

/* Buttons */
.btn {
    display: inline-block; background: var(--blue); color: #fff; border: 0;
    padding: .55rem 1rem; border-radius: 8px; cursor: pointer; font: inherit; font-weight: 600;
}
.btn:hover { background: var(--blue-d); text-decoration: none; color:#fff; }
.btn-sm { padding: .3rem .6rem; font-size: .82rem; }
.btn-ghost { background: #fff; color: var(--blue); border: 1px solid var(--blue); }
.btn-ghost:hover { background: #eef4fb; color: var(--blue); }
.btn-danger { background: var(--red); }
.btn-danger:hover { background: #97271b; }

/* Badges */
.badge { display: inline-block; padding: .15rem .55rem; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.b-in_stock, .b-ok { background: #e6f4ec; color: var(--ok); }
.b-reserved      { background: #fdf1dd; color: var(--warn); }
.b-installed     { background: #e7eefb; color: var(--blue); }
.b-returned      { background: #f0e9fb; color: #6b46c1; }
.b-retired       { background: #f1f3f5; color: var(--muted); }
.b-low           { background: #fdecea; color: var(--red); }

/* Alerts */
.alert { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-size: .92rem; }
.alert-ok  { background: #e6f4ec; color: #146c37; border: 1px solid #bfe3cd; }
.alert-err { background: #fdecea; color: #8a1c12; border: 1px solid #f3c2bd; }

/* Toolbar */
.toolbar { display: flex; gap: .7rem; align-items: center; flex-wrap: wrap; margin-bottom: 1rem; }
.toolbar .spacer { flex: 1; }
.search { max-width: 320px; }

/* Login */
.login-wrap { max-width: 380px; margin: 5rem auto; }
.login-wrap .panel { padding: 1.6rem; }

/* Scan page */
.scan-input { font-size: 1.2rem; padding: .8rem 1rem; }
.scan-result td { vertical-align: top; }