:root{
  --paper:#F3F7FA; --card:#FFFFFF; --ink:#1B1714; --ink-soft:#5E6B73;
  --accent:#E8430F; --line:#E3E8EF;
  --display:"Bricolage Grotesque",system-ui,sans-serif;
  --body:"Hanken Grotesk",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:var(--body);background:var(--paper);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}

.topbar{display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1.5px solid var(--line);background:#fff}
.brand{font-family:var(--display);font-weight:800;font-size:22px;letter-spacing:-.03em;color:var(--ink);text-decoration:none}
.brand span{color:var(--accent)}
.topbar nav a{font-family:var(--body);font-size:14px;color:var(--ink-soft);text-decoration:none;margin-left:18px}
.topbar nav a:hover{color:var(--accent)}

main{flex:1;width:100%;max-width:920px;margin:0 auto;padding:40px 22px}

.auth-card{max-width:400px;margin:24px auto;background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:30px;box-shadow:0 14px 36px rgba(20,30,50,.08)}
.auth-card h1{font-family:var(--display);font-weight:800;font-size:26px;letter-spacing:-.02em;margin-bottom:18px}
form{display:flex;flex-direction:column;gap:16px;margin-top:4px}
label{display:flex;flex-direction:column;gap:7px;font-family:var(--body);font-size:14px;font-weight:600;color:var(--ink)}
label .hint{font-weight:400;color:var(--ink-soft)}
input{width:100%;font-family:var(--body);font-size:16px;color:var(--ink);background:#fff;border:1.5px solid var(--line);border-radius:11px;padding:12px 14px}
input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 16%,transparent)}
.btn{margin-top:4px;font-family:var(--display);font-weight:700;font-size:16px;color:#fff;background:var(--accent);border:none;border-radius:12px;padding:13px;cursor:pointer;transition:.13s}
.btn:hover{transform:translateY(-1px);box-shadow:0 8px 18px rgba(232,67,15,.28)}
.error{background:#FDECEA;color:#B3261E;border:1px solid #F5C6C2;border-radius:10px;padding:10px 13px;font-size:14px;margin-bottom:4px}
.muted{margin-top:18px;font-size:14px;color:var(--ink-soft);text-align:center}
.muted a{color:var(--accent);text-decoration:none}
.muted a:hover{text-decoration:underline}

.panel{background:var(--card);border:1.5px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 14px 36px rgba(20,30,50,.08)}
.panel h1{font-family:var(--display);font-weight:800;font-size:28px;letter-spacing:-.02em;margin-bottom:10px}
.panel p{margin:8px 0}

/* ============ DASHBOARD (Βήμα 3) ============ */
body.app{flex-direction:row}
.nav-toggle{display:none;position:fixed;top:14px;left:14px;z-index:30;width:42px;height:42px;border:1.5px solid var(--line);background:#fff;border-radius:10px;font-size:18px;cursor:pointer}

.sidebar{width:240px;flex-shrink:0;background:#fff;border-right:1.5px solid var(--line);padding:24px 18px;display:flex;flex-direction:column;gap:18px;position:sticky;top:0;height:100vh}
.sidebar .brand{font-size:24px}
.side-create{display:block;text-align:center;text-decoration:none;font-size:15px;padding:11px;margin:0}
.side-nav{display:flex;flex-direction:column;gap:2px;margin-top:4px}
.side-nav a{font-size:15px;color:var(--ink-soft);text-decoration:none;padding:9px 12px;border-radius:9px}
.side-nav a:hover{background:var(--paper);color:var(--ink)}
.side-nav a.on{background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent);font-weight:600}
.side-foot{margin-top:auto;border-top:1.5px solid var(--line);padding-top:14px;display:flex;flex-direction:column;gap:6px}
.side-foot .email{font-size:12.5px;color:var(--ink-soft);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.side-foot .logout{font-size:14px;color:var(--accent);text-decoration:none;font-weight:600}

.app-main{flex:1;min-width:0;max-width:1080px;margin:0;padding:34px clamp(20px,4vw,44px)}

.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:24px}
.page-head h1{font-family:var(--display);font-weight:800;font-size:30px;letter-spacing:-.025em}
.page-head .btn{margin:0;display:inline-flex;align-items:center;padding:10px 18px;font-size:15px;text-decoration:none}

.btn-outline{display:inline-flex;align-items:center;gap:6px;font-family:var(--display);font-weight:700;font-size:15px;color:var(--ink);background:#fff;border:1.5px solid var(--line);border-radius:11px;padding:9px 16px;text-decoration:none;cursor:pointer;transition:.13s}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}

.card{background:var(--card);border:1.5px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 10px 28px rgba(20,30,50,.06);margin-bottom:22px}
.card-title{font-family:var(--display);font-weight:700;font-size:17px;margin-bottom:14px}
.form-card{max-width:560px}
.form-card form{margin-top:2px}
.form-row{display:flex;gap:12px;align-items:center;margin-top:4px}
.form-card .muted{text-align:left}

.flash{background:#E9F8EE;color:#1B7A3D;border:1px solid #BDE9CC;border-radius:11px;padding:12px 15px;font-size:14px;margin-bottom:20px}

table.data{width:100%;border-collapse:collapse;font-size:14.5px}
table.data thead th{text-align:left;font-family:var(--display);font-weight:700;font-size:12.5px;text-transform:uppercase;letter-spacing:.04em;color:var(--ink-soft);padding:0 14px 11px;border-bottom:1.5px solid var(--line)}
table.data tbody td{padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
table.data tbody tr:last-child td{border-bottom:none}
table.data .num{text-align:right;font-variant-numeric:tabular-nums}
.code-link{font-family:var(--display);color:var(--accent);text-decoration:none;font-weight:600}
.code-link:hover{text-decoration:underline}
td.actions{text-align:right;white-space:nowrap}
td.actions a{font-size:13.5px;color:var(--ink-soft);text-decoration:none;margin-left:14px}
td.actions a:hover{color:var(--accent)}

.badge{display:inline-block;font-size:12.5px;font-weight:600;padding:3px 11px;border-radius:999px}
.badge.on{background:#E9F8EE;color:#1B7A3D}
.badge.off{background:#FCEEE8;color:#B65A2E}

.empty-state{text-align:center;background:var(--card);border:1.5px dashed var(--line);border-radius:16px;padding:50px 22px}
.empty-state p{color:var(--ink-soft);margin-bottom:16px}
.empty-state .btn{display:inline-flex;margin:0;text-decoration:none;padding:11px 22px}

/* QR hero */
.qr-hero{display:flex;gap:28px;align-items:center;flex-wrap:wrap}
.qr-hero-info{flex:1;min-width:240px}
.qr-link a{font-family:var(--display);color:var(--accent);text-decoration:none;font-size:15px;word-break:break-all}
.qr-link{margin:8px 0 16px}
.qr-actions{display:flex;flex-wrap:wrap;gap:10px}
.qr-actions .inline{display:inline;margin:0}
.act{font-family:var(--body);font-size:14px;font-weight:600;color:var(--ink);background:#fff;border:1.5px solid var(--line);border-radius:10px;padding:8px 14px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:5px}
.act:hover{border-color:var(--accent);color:var(--accent)}
.act.warn{color:#B65A2E;border-color:#F0CDBA}
.act.good{color:#1B7A3D;border-color:#BDE9CC}
.act.danger{color:#B3261E;border-color:#F5C6C2}
.qr-preview{display:flex;flex-direction:column;align-items:center;gap:0;border-radius:14px;overflow:hidden;border:1.5px solid var(--line)}
.scan-me{background:var(--accent);color:#fff;font-family:var(--display);font-weight:800;font-size:13px;letter-spacing:.08em;padding:7px 0;width:100%;text-align:center}
.qr-preview canvas{display:block;padding:14px;background:#fff}

/* stat cards */
.stat-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}
.stat{background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:18px 18px;display:flex;flex-direction:column;gap:6px}
.stat-label{font-size:12.5px;color:var(--ink-soft);font-weight:600}
.stat-val{font-family:var(--display);font-weight:800;font-size:30px;letter-spacing:-.02em;line-height:1}
.stat-val.small{font-size:18px}
.stat-val.mono{font-family:var(--display)}

.chart-wrap{position:relative;height:260px}

@media(max-width:860px){
  .stat-cards{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:720px){
  .nav-toggle{display:block}
  .sidebar{position:fixed;left:0;top:0;z-index:25;transform:translateX(-100%);transition:transform .2s;box-shadow:0 0 40px rgba(0,0,0,.18)}
  body.nav-open .sidebar{transform:translateX(0)}
  .app-main{padding-top:64px}
  .page-head{flex-wrap:wrap}
  .page-head h1{font-size:24px}
}