/* ============================================================================
   NexusHub Installer — premium UI, μία στήλη, κινητό πρώτα (375 px).
   Φως + σκοτάδι από τη συσκευή. Χωρίς JS (το CSP δεν επιτρέπει): όλα τα εφέ σε CSS.
   Ίδιες κλάσεις με το view.php (καμία αλλαγή HTML).
   ========================================================================== */
:root{
  --bg:#eef1f8; --card:rgba(255,255,255,.80); --card-solid:#fff; --field:rgba(248,250,253,.9);
  --ink:#141a2b; --muted:#5d6788; --line:rgba(20,26,43,.10);
  --accent:#5b5bef; --accent2:#8b5cf6; --accent3:#06b6d4; --accent-ink:#fff;
  --grad:linear-gradient(135deg,#5b5bef 0%,#8b5cf6 48%,#06b6d4 100%);
  --grad-soft:linear-gradient(135deg,rgba(91,91,239,.14),rgba(139,92,246,.10) 50%,rgba(6,182,212,.12));
  --ok:#0f7a44; --ok-bg:rgba(23,160,94,.14);
  --bad:#c42b2b; --bad-bg:rgba(220,60,60,.12);
  --chip:rgba(91,91,239,.10); --ring:rgba(91,91,239,.45);
  --shadow:0 1px 2px rgba(16,24,48,.06),0 20px 50px -24px rgba(40,50,110,.4);
  --shadow-sm:0 1px 2px rgba(16,24,48,.08),0 10px 26px -18px rgba(40,50,110,.5);
  --r:18px; --r-sm:12px;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#080b14; --card:rgba(20,27,44,.66); --card-solid:#141b2c; --field:rgba(17,24,39,.75);
  --ink:#e9edf9; --muted:#98a3bf; --line:rgba(255,255,255,.08);
  --accent:#8b9bff; --accent2:#a78bfa; --accent3:#22d3ee; --accent-ink:#0a0e18;
  --grad:linear-gradient(135deg,#6d6bff 0%,#a78bfa 48%,#22d3ee 100%);
  --grad-soft:linear-gradient(135deg,rgba(109,107,255,.20),rgba(167,139,250,.14) 50%,rgba(34,211,238,.16));
  --ok:#49d78d; --ok-bg:rgba(32,120,70,.26);
  --bad:#ff9090; --bad-bg:rgba(170,45,48,.32);
  --chip:rgba(139,155,255,.14); --ring:rgba(139,155,255,.55);
  --shadow:0 1px 2px rgba(0,0,0,.5),0 26px 64px -28px rgba(0,0,0,.82);
  --shadow-sm:0 1px 2px rgba(0,0,0,.5),0 14px 32px -20px rgba(0,0,0,.78);
}}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;min-height:100vh;background:var(--bg);color:var(--ink);
  font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;position:relative;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:-20vmax;z-index:-2;pointer-events:none;
  background:
    radial-gradient(38vmax 38vmax at 16% 10%,rgba(91,91,239,.38),transparent 60%),
    radial-gradient(34vmax 34vmax at 90% 6%,rgba(139,92,246,.34),transparent 62%),
    radial-gradient(42vmax 42vmax at 82% 94%,rgba(6,182,212,.30),transparent 60%),
    radial-gradient(34vmax 34vmax at 6% 90%,rgba(167,139,250,.26),transparent 60%);
  filter:blur(18px) saturate(118%);animation:nxDrift 28s ease-in-out infinite alternate;
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background:
    linear-gradient(0deg,var(--bg),rgba(0,0,0,0) 26%,rgba(0,0,0,0) 72%,var(--bg)),
    linear-gradient(90deg,var(--line) 1px,transparent 1px),
    linear-gradient(var(--line) 1px,transparent 1px);
  background-size:cover,46px 46px,46px 46px;
  -webkit-mask-image:radial-gradient(130vmax 100vmax at 50% -10%,#000 35%,transparent 80%);
          mask-image:radial-gradient(130vmax 100vmax at 50% -10%,#000 35%,transparent 80%);
}
@keyframes nxDrift{0%{transform:translate3d(-2%,-1%,0) rotate(0) scale(1.02)}50%{transform:translate3d(2%,1.5%,0) rotate(6deg) scale(1.06)}100%{transform:translate3d(-1%,2%,0) rotate(-4deg) scale(1.03)}}

.wrap{max-width:780px;margin:0 auto;padding:clamp(16px,4vw,32px) 18px 40px}

/* ---- Κεφαλίδα ---- */
.top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:2px 0 20px}
.brand{font-weight:800;letter-spacing:.2px;display:flex;align-items:center;gap:11px;min-width:0;font-size:17px}
.brand .muted{font-weight:600;font-size:inherit}
.dot{width:13px;height:13px;border-radius:50%;flex:none;background:var(--grad);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 24%,transparent),0 0 18px 3px color-mix(in srgb,var(--accent2) 70%,transparent);
  animation:nxPulse 2.6s ease-in-out infinite}
@keyframes nxPulse{0%,100%{box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 22%,transparent),0 0 14px 2px color-mix(in srgb,var(--accent2) 55%,transparent)}
  50%{box-shadow:0 0 0 7px color-mix(in srgb,var(--accent) 10%,transparent),0 0 26px 6px color-mix(in srgb,var(--accent2) 85%,transparent)}}
.lang{color:var(--ink);font-weight:700;text-decoration:none;font-size:13.5px;white-space:nowrap;padding:7px 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--card);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);box-shadow:var(--shadow-sm);
  transition:transform .18s ease,border-color .18s ease,color .18s ease}
.lang:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent) 55%,var(--line));color:var(--accent)}

/* ---- Τίτλοι ---- */
h1{font-size:clamp(22px,4.4vw,28px);line-height:1.2;margin:0 0 10px;font-weight:800;letter-spacing:-.4px}
h2{font-size:16px;margin:20px 0 9px;display:flex;align-items:center;gap:9px;font-weight:750;letter-spacing:-.2px}
h2::before{content:"";width:8px;height:17px;border-radius:4px;background:var(--grad);box-shadow:0 0 12px -1px color-mix(in srgb,var(--accent2) 70%,transparent);flex:none}
.lead{font-size:16.5px;line-height:1.55;margin:0 0 8px;color:var(--ink)}

/* ---- Κάρτες (glass) ---- */
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:clamp(18px,3vw,26px);margin:0 0 16px;
  box-shadow:var(--shadow);backdrop-filter:blur(14px) saturate(130%);-webkit-backdrop-filter:blur(14px) saturate(130%);
  animation:nxRise .55s cubic-bezier(.2,.7,.2,1) both}
.card::before{content:"";position:absolute;left:0;right:0;top:0;height:2px;border-radius:var(--r) var(--r) 0 0;background:var(--grad);opacity:.85}
.card.narrow{max-width:480px;margin:min(10vh,60px) auto}
@keyframes nxRise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}

.hint{color:var(--muted);font-size:14px;line-height:1.55;margin:6px 0 10px}
.hint.bad{color:var(--bad);font-weight:650}
.muted{color:var(--muted);font-size:14px}
code{background:var(--chip);padding:2px 8px;border-radius:7px;font-size:.9em;font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace;overflow-wrap:anywhere;color:var(--accent);font-weight:600}

/* ---- Stepper (7 βήματα) ---- */
.steps{margin:0 0 18px}
.step-now{display:none;margin:0 0 4px;font-weight:750;font-size:13.5px;color:var(--muted)}
.steps ol{list-style:none;margin:0;padding:0;display:flex;gap:0;counter-reset:none}
.steps li{position:relative;flex:1;display:flex;flex-direction:column;align-items:center;gap:7px;min-width:0;font-size:12px;color:var(--muted);text-align:center}
.steps li::before{content:"";position:absolute;top:15px;left:-50%;width:100%;height:3px;border-radius:999px;background:var(--line);z-index:0}
.steps li:first-child::before{display:none}
.steps li .n{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;flex:none;z-index:1;
  font-weight:800;font-size:13.5px;background:var(--card-solid);color:var(--muted);border:2px solid var(--line);box-shadow:var(--shadow-sm);transition:all .25s ease}
.steps li .t{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%;transition:color .25s ease}
.steps li.done::before{background:var(--grad)}
.steps li.done .n{background:var(--grad);color:#fff;border-color:transparent}
.steps li.done .t{color:var(--ink)}
.steps li.on::before{background:linear-gradient(90deg,var(--accent),color-mix(in srgb,var(--accent) 30%,var(--line)))}
.steps li.on .n{background:var(--card-solid);color:var(--accent);border-color:var(--accent);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 20%,transparent),var(--shadow-sm);animation:nxStep 2.2s ease-in-out infinite}
.steps li.on .t{color:var(--ink);font-weight:750}
@keyframes nxStep{0%,100%{box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent),var(--shadow-sm)}50%{box-shadow:0 0 0 7px color-mix(in srgb,var(--accent) 8%,transparent),0 0 18px color-mix(in srgb,var(--accent2) 55%,transparent)}}

/* ---- Φόρμες ---- */
label,.flabel{display:block;font-weight:650;font-size:13.5px;margin:15px 0 6px;color:var(--ink)}
.static{margin:0}
.static code{font-size:15px;padding:6px 12px;display:inline-block}
input[type=text],input[type=password],input[type=email]{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--r-sm);
  background:var(--field);color:var(--ink);font:inherit;min-height:48px;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}
input[type=text]:focus,input[type=password]:focus,input[type=email]:focus{outline:0;border-color:transparent;box-shadow:0 0 0 3px var(--ring);background:var(--card-solid)}
input::placeholder{color:color-mix(in srgb,var(--muted) 75%,transparent)}
input[type=checkbox]{width:20px;height:20px;margin:0;flex:none;accent-color:var(--accent)}
.row{display:flex;gap:12px;align-items:flex-end}
.row .grow{flex:1;min-width:0}
.row .port{width:100px;flex:none}

/* ---- Κουμπιά ---- */
.actions{display:flex;flex-direction:row-reverse;justify-content:flex-start;gap:12px;margin-top:22px;flex-wrap:wrap}
button{padding:13px 24px;border:0;border-radius:var(--r-sm);background:var(--grad);background-size:160% 160%;background-position:0% 50%;
  color:#fff;font:inherit;font-weight:750;letter-spacing:.2px;cursor:pointer;min-height:48px;
  box-shadow:0 10px 24px -11px color-mix(in srgb,var(--accent) 85%,transparent);
  transition:transform .18s ease,box-shadow .22s ease,background-position .5s ease}
button:hover{transform:translateY(-2px);background-position:100% 50%;box-shadow:0 16px 32px -11px color-mix(in srgb,var(--accent2) 85%,transparent)}
button:active{transform:translateY(0)}
button.ghost{background:var(--chip);color:var(--ink);box-shadow:none;border:1px solid var(--line)}
button.ghost:hover{background:color-mix(in srgb,var(--accent) 12%,var(--chip));border-color:color-mix(in srgb,var(--accent) 40%,var(--line))}
button[disabled]{opacity:.5;cursor:not-allowed;filter:grayscale(.3);transform:none;box-shadow:none}
button:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--ring);outline-offset:3px}

.alert{position:relative;border-radius:var(--r-sm);padding:13px 16px 13px 18px;margin:0 0 16px;font-weight:650;overflow:hidden}
.alert::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px}
.alert.bad{background:var(--bad-bg);color:var(--bad)}
.alert.bad::before{background:var(--bad)}
.pill{display:inline-block;padding:4px 12px;border-radius:999px;background:var(--grad-soft);border:1px solid color-mix(in srgb,var(--accent) 24%,transparent);
  color:var(--accent);font-size:13px;font-weight:750;line-height:1.5}

/* ---- Έλεγχος server ---- */
.req{list-style:none;margin:0;padding:0}
.req li{display:flex;gap:12px;align-items:center;padding:9px 0;border-top:1px solid var(--line);font-size:15px}
.req li:first-child{border-top:0}
.req .mark{flex:none;min-width:46px;text-align:center;font-size:11.5px;font-weight:800;border-radius:999px;padding:3px 9px;text-transform:uppercase;letter-spacing:.3px}
.req li.ok .mark{background:var(--ok-bg);color:var(--ok)}
.req li.no .mark{background:var(--bad-bg);color:var(--bad)}
ol.plain{margin:0;padding-left:22px}
ol.plain li{margin:5px 0}
ol.plain li::marker{color:var(--accent);font-weight:700}

/* ---- Τι θα μπει ---- */
.units{display:grid;gap:12px;margin-top:14px}
.unit{position:relative;border:1px solid var(--line);border-radius:var(--r-sm);padding:14px 16px;background:var(--field);transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease}
.unit:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent) 35%,var(--line));box-shadow:var(--shadow-sm)}
.unit.fixed{background:var(--grad-soft);border-color:color-mix(in srgb,var(--accent) 22%,var(--line))}
.u-head{display:flex;flex-wrap:wrap;align-items:center;gap:9px 11px}
.u-name{margin:0;font-weight:750;font-size:16px}
.u-head .muted{margin-left:auto;font-size:13px}
.about{margin:8px 0 0;font-size:14.5px;color:var(--ink);line-height:1.5}
details{margin-top:8px}
summary{cursor:pointer;color:var(--accent);font-weight:650;font-size:14px;list-style:none;display:inline-flex;align-items:center;gap:6px}
summary::-webkit-details-marker{display:none}
summary::before{content:"＋";font-weight:800;font-size:13px}
details[open] summary::before{content:"－"}
details p{margin:8px 0 0;font-size:14.5px;color:var(--muted);line-height:1.55}
fieldset.media{border:1px solid var(--line);border-radius:var(--r-sm);padding:14px 16px 16px;margin:18px 0 0;background:var(--field)}
fieldset.media legend{font-weight:750;padding:0 8px;color:var(--accent)}
.sub{margin:14px 0 0;font-weight:700;font-size:14.5px}
.sub+.row label{margin-top:6px}

/* ---- Σύνοψη ---- */
dl.sum{display:grid;grid-template-columns:minmax(120px,30%) 1fr;gap:12px 16px;margin:8px 0 4px;padding:4px 0}
dl.sum dt{color:var(--muted);font-size:14px;font-weight:650}
dl.sum dd{margin:0;overflow-wrap:anywhere;font-weight:600}

/* ---- Λίστες / πρόοδος ---- */
.tasks{list-style:none;margin:0;padding:0}
.tasks li{display:flex;gap:12px;align-items:center;padding:10px 0;border-top:1px dashed var(--line)}
.tasks li:first-child{border-top:0}
.tasks li .muted{margin-left:auto;white-space:nowrap}
.tasks .mark{flex:none;width:24px;height:24px;display:flex;align-items:center;justify-content:center;border-radius:50%;font-weight:800;font-size:13px}
.tasks li.done .mark{background:var(--ok-bg);color:var(--ok)}
.tasks li.now{font-weight:750}
.tasks li.now .mark{background:var(--grad);color:#fff;animation:nxSpin 1.4s linear infinite,nxGlow 1.6s ease-in-out infinite}
.tasks li.fail{color:var(--bad);font-weight:750}
.tasks li.fail .mark{background:var(--bad-bg);color:var(--bad)}
.tasks li.wait{color:var(--muted)}
.tasks li.wait .mark{background:var(--chip);color:var(--muted)}
@keyframes nxSpin{to{transform:rotate(360deg)}}
@keyframes nxGlow{0%,100%{box-shadow:0 0 0 0 color-mix(in srgb,var(--accent) 45%,transparent)}50%{box-shadow:0 0 0 6px color-mix(in srgb,var(--accent) 0%,transparent)}}
progress{display:block;width:100%;height:12px;margin:8px 0 16px;border:0;border-radius:999px;background:var(--chip);overflow:hidden;appearance:none;-webkit-appearance:none}
progress::-webkit-progress-bar{background:var(--chip);border-radius:999px}
progress::-webkit-progress-value{background:var(--grad);border-radius:999px;transition:width .5s cubic-bezier(.2,.7,.2,1)}
progress::-moz-progress-bar{background:var(--grad);border-radius:999px}

.foot{color:var(--muted);font-size:12.5px;text-align:center;margin:28px 0 8px;letter-spacing:.2px}

/* ---- Κινητό ---- */
@media (max-width:560px){
  .wrap{padding:16px 14px 32px}
  .card{padding:18px}
  .step-now{display:block}
  .steps li .t{display:none}
  .steps li .n{width:28px;height:28px;font-size:12.5px}
  .steps li::before{top:13px}
  dl.sum{grid-template-columns:1fr;gap:3px}
  dl.sum dd{margin-bottom:10px}
  .actions{flex-direction:column-reverse}
  .actions button{width:100%}
  .row .port{width:88px}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}