:root{
  --bg:#eef1f5; --card:#ffffff; --fg:#111418; --mut:#667085; --line:#e4e8ee;
  --pri:#0b6b3a; --pri2:#0a5730; --pri-soft:#e7f4ec; --danger:#b3261e; --danger-soft:#fdecea;
  --warn:#8a6100; --warn-soft:#fdf4e3; --ok:#0a5730; --shadow:0 1px 3px rgba(16,24,40,.06),0 1px 2px rgba(16,24,40,.04);
  --r:14px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0e1116; --card:#171b21; --fg:#e8eaed; --mut:#98a2b3; --line:#262c34;
  --pri:#2ea36a; --pri2:#268a59; --pri-soft:#122a1e; --danger:#f2645a; --danger-soft:#3a1a18;
  --warn:#e0b64a; --warn-soft:#2a2413; --ok:#8fe0b0; --shadow:0 1px 3px rgba(0,0,0,.4);
}}
*{box-sizing:border-box}
html,body{margin:0}
body{font:15px/1.55 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--fg);-webkit-font-smoothing:antialiased}

/* header */
.top{position:sticky;top:0;z-index:5;display:flex;align-items:center;justify-content:space-between;
  padding:12px 18px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:11px;font-weight:600;font-size:16px;color:var(--mut)}
.brand .logo{height:34px;width:auto;display:block}
.brand .sep{width:1px;height:22px;background:var(--line)}
.brand b{color:var(--fg);font-weight:700}
@media (prefers-color-scheme:dark){.brand .logo{background:#fff;border-radius:6px;padding:3px}}
/* centered brand hero (logo + name above the form) */
.hero{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;margin:14px 0 22px}
.hero .logo{height:56px;width:auto;display:block}
.hero .brandName{font-weight:700;font-size:21px;color:var(--fg);letter-spacing:.2px}
@media (prefers-color-scheme:dark){.hero .logo{background:#fff;border-radius:8px;padding:5px}}
/* signed-in controls float top-right (no empty header bar on the login screen) */
.userchip{position:fixed;top:12px;right:16px;z-index:5;display:flex;align-items:center;gap:12px;font-size:13px;color:var(--mut);
  background:var(--card);border:1px solid var(--line);border-radius:10px;padding:7px 12px}
.userchip.hide{display:none}
.userchip .who{color:var(--fg);font-weight:600}
.back{display:grid;place-items:center;width:30px;height:30px;border-radius:8px;border:1px solid var(--line);
  color:var(--fg);text-decoration:none;font-size:17px;line-height:1}
.back:hover{border-color:var(--pri);color:var(--pri)}
.navbtn{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border:1px solid var(--line);border-radius:9px;
  color:var(--fg);text-decoration:none;font-weight:600;font-size:13px}
.navbtn:hover{border-color:var(--pri);color:var(--pri)}
.wrap{max-width:560px;margin:0 auto;padding:22px 16px 48px}
.wrap.wide{max-width:760px}

.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;margin-bottom:16px;box-shadow:var(--shadow)}
h1{font-size:19px;margin:0 0 4px}h2{font-size:15px;margin:0 0 14px;letter-spacing:.2px}
.sub{color:var(--mut);font-size:13px;margin:0 0 16px}
label{display:block;font-size:12.5px;font-weight:600;color:var(--mut);margin:12px 0 5px}
input{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:10px;background:transparent;color:var(--fg);font-size:15px;transition:border-color .15s,box-shadow .15s}
input:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px var(--pri-soft)}

.seg{display:flex;gap:8px;margin:14px 0;background:var(--bg);padding:4px;border-radius:11px}
.seg button{flex:1;padding:9px;border:0;background:transparent;color:var(--mut);border-radius:8px;cursor:pointer;font-weight:600;font-size:14px}
.seg button.on{background:var(--card);color:var(--pri);box-shadow:var(--shadow)}

.btn{width:100%;padding:13px;border:0;border-radius:11px;background:var(--pri);color:#fff;font-size:15px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:9px;transition:background .15s}
.btn:hover{background:var(--pri2)} .btn:disabled{opacity:.7;cursor:progress}
.btn.block{margin-top:18px}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.45);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite;display:none}
.btn.loading .spinner{display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

/* slot meter */
.slots{display:flex;align-items:center;gap:10px;margin:2px 0 14px}
.meter{flex:1;height:8px;border-radius:6px;background:var(--bg);overflow:hidden}
.meter i{display:block;height:100%;background:var(--pri);width:0;transition:width .3s}
.slots .n{font-size:12.5px;color:var(--mut);white-space:nowrap}

/* recommended-device hero */
.reco{display:flex;align-items:center;gap:14px;padding:16px;border:1px solid var(--pri);
  background:var(--pri-soft);border-radius:13px}
.reco .ico{font-size:34px;line-height:1}
.reco .tx{flex:1;display:flex;flex-direction:column;gap:1px}
.reco .tx small{color:var(--mut);font-size:11px;text-transform:uppercase;letter-spacing:.5px}
.reco .tx b{font-size:17px} .reco .tx span{color:var(--mut);font-size:12.5px}
.reco button{white-space:nowrap}
@media (max-width:420px){.reco{flex-wrap:wrap}.reco button{width:100%}}

/* platform grid */
.plats{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.plat{display:flex;align-items:center;gap:11px;padding:13px;border:1px solid var(--line);border-radius:12px;background:transparent;color:var(--fg);cursor:pointer;text-align:left;transition:border-color .15s,transform .05s}
.plat:hover{border-color:var(--pri)} .plat:active{transform:scale(.99)}
.plat.rec{border-color:var(--pri);box-shadow:0 0 0 1px var(--pri) inset}
.plat .ico{font-size:22px;line-height:1;width:26px;text-align:center}
.plat .t{font-weight:600;font-size:14px}.plat .s{color:var(--mut);font-size:12px}
.rec-badge{font-size:10px;background:var(--pri);color:#fff;border-radius:20px;padding:1px 7px;margin-left:auto}

/* data usage */
.usage-total{display:flex;align-items:baseline;gap:8px;margin:2px 0 16px;flex-wrap:wrap}
.usage-total b{font-size:26px;font-weight:700}
.usage-total b#usageUp{font-size:18px;color:var(--mut)}
.usage-total span{color:var(--mut);font-size:12px;margin-right:10px}
.chart{width:100%}
.chart svg{width:100%;height:120px;display:block;overflow:visible}
.chart .bar{fill:var(--pri)} .chart .bar.up{fill:color-mix(in srgb,var(--pri) 45%, transparent)}
.chart .lbl{fill:var(--mut);font-size:10px}
.chart .val{fill:var(--fg);font-size:9.5px}

/* tutorial */
.seg.lang{margin:0;width:auto;flex:0 0 auto}
.seg.lang button{padding:6px 12px;font-size:12.5px}
.steps{margin:6px 0 0;padding-left:0;list-style:none;counter-reset:s}
.steps li{position:relative;padding:11px 0 11px 40px;border-top:1px solid var(--line);font-size:14px;counter-increment:s}
.steps li:first-child{border-top:0}
.steps li::before{content:counter(s);position:absolute;left:0;top:11px;width:26px;height:26px;border-radius:50%;
  background:var(--pri-soft);color:var(--pri);font-weight:700;font-size:13px;display:grid;place-items:center}
.steps li code{background:var(--bg);padding:2px 6px;border-radius:6px;font-size:12.5px}
.steps li b{color:var(--pri)}

/* device list */
.dev{display:flex;align-items:center;gap:12px;padding:12px 0;border-top:1px solid var(--line)}
.dev .ico{font-size:20px;width:24px;text-align:center}
.dev .meta{flex:1}.dev .meta b{font-size:14px}.dev .meta small{display:block;color:var(--mut);font-size:12px}
.rev{background:transparent;border:1px solid var(--line);color:var(--danger);cursor:pointer;font-size:12.5px;font-weight:600;padding:7px 12px;border-radius:9px}
.rev:hover{background:var(--danger-soft);border-color:var(--danger)}
.empty{color:var(--mut);font-size:13px;padding:14px 0;text-align:center}

.note{display:flex;gap:9px;font-size:12.5px;color:var(--mut);background:var(--bg);border-radius:10px;padding:11px 13px;margin-top:16px}
.row{display:flex;justify-content:space-between;align-items:center;gap:10px}
.link{color:var(--pri);cursor:pointer;font-size:13px;background:none;border:0;padding:0;font-weight:600;text-decoration:none}
.hide{display:none!important}

/* inline form message (validation / login errors — shown near the form, not a corner toast) */
.inline-msg{margin-top:12px;padding:10px 12px;border-radius:9px;font-size:13px;display:flex;align-items:center;gap:8px}
.inline-msg::before{content:'⛔';font-size:14px}
.inline-msg.err{background:var(--danger-soft);color:var(--danger)}
.inline-msg.ok{background:var(--pri-soft);color:var(--ok)} .inline-msg.ok::before{content:'✅'}
.inline-msg.hide{display:none}

/* toasts */
#toasts{position:fixed;top:14px;right:14px;z-index:50;display:flex;flex-direction:column;gap:9px;max-width:min(360px,92vw)}
.toast{display:flex;align-items:flex-start;gap:10px;background:var(--card);border:1px solid var(--line);border-left:4px solid var(--mut);
  border-radius:11px;padding:12px 13px;box-shadow:0 6px 20px rgba(16,24,40,.14);animation:slidein .18s ease}
.toast.ok{border-left-color:var(--pri)} .toast.err{border-left-color:var(--danger)} .toast.warn{border-left-color:var(--warn)}
.toast .ti{font-size:16px;line-height:1.3}
.toast .tx{flex:1;font-size:13px} .toast .tx b{display:block;margin-bottom:1px}
.toast .cl{background:none;border:0;color:var(--mut);cursor:pointer;font-size:15px;line-height:1;padding:0}
@keyframes slidein{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:none}}

/* admin bits */
.r{display:flex;gap:10px;flex-wrap:wrap;align-items:end}.r>div{flex:1;min-width:130px}
button.mini{padding:11px 15px;border:0;border-radius:10px;background:var(--pri);color:#fff;font-weight:600;cursor:pointer}
button.sec{background:transparent;border:1px solid var(--line);color:var(--fg)} button.danger{background:var(--danger)}
table{width:100%;border-collapse:collapse;margin-top:10px;font-size:13px}
td,th{text-align:left;padding:8px 6px;border-top:1px solid var(--line)}
th{color:var(--mut);font-weight:600}
.pill{padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}.pill.on{background:var(--pri-soft);color:var(--ok)}.pill.off{background:var(--danger-soft);color:var(--danger)}

/* install troubleshooting block */
.tips{margin-top:14px;border-top:1px solid var(--line);padding-top:10px}
.tips>summary{cursor:pointer;font-weight:600;color:var(--mut);list-style:none}
.tips>summary::before{content:"▸ ";color:var(--pri)}
.tips[open]>summary::before{content:"▾ "}
.tips .steps{margin-top:8px}
.tips .steps li{font-size:.92em;color:var(--mut)}

/* OTP step-up modal */
.modal{position:fixed;inset:0;background:rgba(15,23,42,.5);display:flex;align-items:center;justify-content:center;z-index:20;padding:16px}
.modal.hide{display:none}
.modal-box{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;max-width:380px;width:100%;box-shadow:var(--shadow)}
.otp-enter{margin-top:6px}
#otpCode{letter-spacing:.5em;text-align:center;font-size:22px;font-weight:700}
.block-link{display:block;width:100%;text-align:center;margin-top:12px;background:none;border:none;cursor:pointer;color:var(--mut)}

/* ============ mobile-friendly ============ */
@media (max-width:560px){
  .wrap{padding:16px 12px 40px}
  .hero{margin:6px 0 18px;gap:9px}
  .hero .logo{height:50px}
  .hero .brandName{font-size:19px}
  .card{padding:18px 16px;border-radius:12px;margin-bottom:14px}
  h1{font-size:18px}
  /* signed-in chip: compact, drop the "Signed in as <name>" label to save width */
  .userchip{top:10px;right:10px;gap:10px;padding:6px 10px;font-size:12px;max-width:72vw}
  .userchip>span:first-child{display:none}
  /* profile grid: two even columns, comfortable tap targets */
  .plats{grid-template-columns:1fr 1fr;gap:8px}
  .plat{padding:13px 12px}
  .plat .t{font-size:13.5px}
  /* recommended-device card stacks its button */
  .reco{padding:14px;gap:12px}
  /* tutorial header (title + language toggle) wraps instead of squeezing */
  #tutCard .row{flex-wrap:wrap}
  .seg.lang{width:100%}
  .modal{padding:12px}
  .modal-box{padding:20px}
  .note{font-size:12px}
}
@media (max-width:380px){
  .plats{grid-template-columns:1fr}          /* single column on very narrow phones */
  .hero .logo{height:46px}
}
/* never let the logo overflow a tiny screen */
.hero .logo{max-width:78vw}

/* brand platform icons (inline SVG) */
.plat .ico svg,.reco .ico svg,.dev .ico svg{width:1em;height:1em;display:block;margin:0 auto}
.reco .ico{color:var(--pri)}                 /* detected-device icon in brand green */
.plat .ico{color:var(--fg)}

/* Android: geteduroam install helper (QR + Play Store link) */
.apphelp{display:flex;gap:14px;align-items:center;padding:14px;border:1px solid var(--pri);background:var(--pri-soft);border-radius:12px;margin-bottom:14px}
.apphelp.hide{display:none}
.apphelp .qr{width:96px;height:96px;flex:0 0 96px;background:#fff;border-radius:8px;padding:5px}
.apphelp .apptx{flex:1;display:flex;flex-direction:column;gap:3px}
.apphelp .apptx b{font-size:14px}
.apphelp .apptx p{margin:0;font-size:12.5px;color:var(--mut)}
.applink{display:inline-block;width:fit-content;margin-top:5px;background:var(--pri);color:#fff;font-weight:600;font-size:13px;padding:9px 14px;border-radius:10px;text-decoration:none}
.applink:hover{background:var(--pri2)}
@media(max-width:480px){.apphelp{flex-wrap:wrap;justify-content:center;text-align:center}.applink{width:100%;text-align:center}}

/* device connection status */
.dev .meta .st{display:inline-block;font-size:11px;font-weight:600;margin:2px 0;padding:1px 9px;border-radius:20px}
.st.on{background:var(--pri-soft);color:var(--ok)}
.st.seen{background:var(--bg);color:var(--mut)}
.st.off{background:var(--warn-soft);color:var(--warn)}

/* form select (admin) — match input styling */
select{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--fg);font-size:15px}
select:focus{outline:none;border-color:var(--pri);box-shadow:0 0 0 3px var(--pri-soft)}