/* =====================================================================
   isSensorCloud — Φύλλο στυλ (ταυτότητα "instrument panel")
   Σκούρο θέμα ως προεπιλογή· τα LED κατάστασης είναι ο ήρωας.
   Εναλλαγή θέματος μέσω [data-theme="light"] στο <html>.
   Χωρίς εξωτερικές γραμματοσειρές (offline-friendly για edge).
   ===================================================================== */

:root {
  /* Παλέτα — σκούρο (προεπιλογή) */
  --bg:        #0E1419;
  --bg-grad:   radial-gradient(1200px 600px at 80% -10%, #16222c 0%, #0E1419 60%);
  --panel:     #161D24;
  --panel-2:   #1E272F;
  --border:    #2A353F;
  --border-2:  #38454F;
  --text:      #E4EAF0;
  --muted:     #8A99A8;
  --muted-2:   #61707E;
  --accent:    #00B4D8;
  --accent-dim:#0a3a45;

  /* Κατάσταση (LED) */
  --ok:    #2ED47A;
  --warn:  #F5A623;
  --alarm: #FF4D4F;
  --ok-glow:    rgba(46,212,122,.55);
  --warn-glow:  rgba(245,166,35,.55);
  --alarm-glow: rgba(255,77,79,.65);

  /* Τυπογραφία */
  --font-ui:   system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --radius:    12px;
  --radius-sm: 8px;
  --shadow:    0 8px 30px rgba(0,0,0,.35);
  --shadow-sm: 0 2px 10px rgba(0,0,0,.25);

  --ok-text: var(--ok);
  --warn-text: var(--warn);
  --alarm-text: var(--alarm);
}

html[data-theme="light"] {
  --bg:        #EEF2F6;
  --bg-grad:   radial-gradient(1100px 560px at 85% -12%, #ffffff 0%, #EEF2F6 55%);
  --panel:     #FFFFFF;
  --panel-2:   #F4F7FA;
  --border:    #DAE2EA;
  --border-2:  #C4CFD9;
  --text:      #16202A;
  --muted:     #5C6B7A;
  --muted-2:   #8696A4;
  --accent:    #0089A8;
  --accent-dim:#d6eef4;

  --ok:    #16A05A;
  --warn:  #C77A09;
  --alarm: #D32F2F;
  --ok-glow:    rgba(22,160,90,.35);
  --warn-glow:  rgba(199,122,9,.35);
  --alarm-glow: rgba(211,47,47,.4);
  --shadow:    0 8px 30px rgba(20,40,60,.12);
  --shadow-sm: 0 2px 10px rgba(20,40,60,.08);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--text);
  background: var(--bg);
  background-image: var(--bg-grad);
  background-attachment: fixed;
  font-size: 15px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1,h2,h3 { margin: 0; font-weight: 650; letter-spacing: -0.01em; }

.mono { font-family: var(--font-mono); }

/* --------------------------------------------------------------- App bar */
.appbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  padding: 0 20px; height: 60px;
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand {
  display: flex; align-items: center; gap: 11px;
  font-weight: 700; font-size: 17px; letter-spacing: -0.02em;
  white-space: nowrap;
}
.brand .logo {
  width: 30px; height: 30px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #0077a3);
  display: grid; place-items: center; box-shadow: 0 0 0 1px var(--border-2);
}
.brand .logo svg { width: 18px; height: 18px; }
.brand b { color: var(--text); }
.brand span { color: var(--accent); }

.nav { display: flex; gap: 4px; margin-left: 6px; }
.nav.mobile { display: none; }  /* εμφανίζεται μόνο σε κινητά (βλ. media query) */
.nav a {
  padding: 8px 13px; border-radius: var(--radius-sm);
  color: var(--muted); font-weight: 550; font-size: 14px;
  text-decoration: none; transition: background .15s, color .15s;
}
.nav a:hover { color: var(--text); background: var(--panel-2); text-decoration: none; }
.nav a.active { color: var(--text); background: var(--accent-dim); }

.spacer { flex: 1; }

.toolbar { display: flex; align-items: center; gap: 8px; }

/* Κουμπιά */
.btn {
  appearance: none; cursor: pointer;
  font-family: inherit; font-size: 14px; font-weight: 550;
  color: var(--text); background: var(--panel-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 8px 14px; transition: background .15s, border-color .15s, transform .05s;
  display: inline-flex; align-items: center; gap: 7px;
}
.btn:hover { border-color: var(--border-2); background: color-mix(in srgb, var(--panel-2) 70%, var(--accent-dim)); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #03252e; font-weight: 650; }
.btn.primary:hover { filter: brightness(1.07); background: var(--accent); }
.btn.ghost { background: transparent; }
.btn.danger { color: var(--alarm); border-color: color-mix(in srgb, var(--alarm) 40%, var(--border)); }
.btn.danger:hover { background: color-mix(in srgb, var(--alarm) 14%, transparent); }
.btn.icon { padding: 8px; width: 38px; height: 38px; justify-content: center; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.sm { padding: 5px 10px; font-size: 13px; }

.icon-only { width: 20px; height: 20px; display: inline-block; }

/* --------------------------------------------------------------- Layout */
.wrap { max-width: 1320px; margin: 0 auto; padding: 22px 20px 60px; }
.page-head { display: flex; align-items: flex-end; gap: 16px; margin-bottom: 18px; flex-wrap: wrap; }
.page-head h1 { font-size: 22px; }
.page-head .sub { color: var(--muted); font-size: 14px; }

.row { display: flex; gap: 16px; flex-wrap: wrap; }
.grid { display: grid; gap: 16px; }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.card .card-h {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.card .card-h h3 { font-size: 15px; }
.card .card-h .sub { color: var(--muted); font-size: 13px; }
.card .card-b { padding: 16px; }

label.field { display: block; margin-bottom: 13px; }
label.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }

input, select, textarea {
  width: 100%; font-family: inherit; font-size: 14px;
  color: var(--text); background: var(--panel-2);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 9px 11px; transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
}
select { cursor: pointer; }

/* --------------------------------------------------------------- Status LED */
.led {
  --c: var(--ok); --g: var(--ok-glow);
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--c); box-shadow: 0 0 0 2px color-mix(in srgb, var(--c) 30%, transparent), 0 0 10px var(--g);
  display: inline-block; flex: none;
}
.led.ok    { --c: var(--ok);    --g: var(--ok-glow); }
.led.warn  { --c: var(--warn);  --g: var(--warn-glow); }
.led.alarm { --c: var(--alarm); --g: var(--alarm-glow); animation: pulse 1.25s ease-in-out infinite; }

@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 2px color-mix(in srgb, var(--c) 35%, transparent), 0 0 8px var(--g); }
  50%     { box-shadow: 0 0 0 4px color-mix(in srgb, var(--c) 18%, transparent), 0 0 18px var(--g); }
}

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--muted);
}
.badge.ok    { color: var(--ok);    border-color: color-mix(in srgb, var(--ok) 40%, var(--border)); }
.badge.warn  { color: var(--warn);  border-color: color-mix(in srgb, var(--warn) 40%, var(--border)); }
.badge.alarm { color: var(--alarm); border-color: color-mix(in srgb, var(--alarm) 40%, var(--border)); }

/* --------------------------------------------------------------- Summary rail */
.rail {
  display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 18px;
}
.stat {
  flex: 1; min-width: 150px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 14px 16px; box-shadow: var(--shadow-sm);
  position: relative; overflow: hidden;
}
.stat .k { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.stat .v { font-family: var(--font-mono); font-size: 30px; font-weight: 600; margin-top: 4px; line-height: 1; }
.stat.ok .v { color: var(--ok); }
.stat.warn .v { color: var(--warn); }
.stat.alarm .v { color: var(--alarm); }
.stat .edge { position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent); }
.stat.ok .edge { background: var(--ok); }
.stat.warn .edge { background: var(--warn); }
.stat.alarm .edge { background: var(--alarm); }

/* --------------------------------------------------------------- Sensor map */
.map-toolbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.map-toolbar select { width: auto; min-width: 220px; }

.mapframe {
  position: relative; width: 100%;
  background: var(--panel-2); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  min-height: 320px;
}
.mapframe img { display: block; width: 100%; height: auto; user-select: none; -webkit-user-drag: none; }
.mapframe.empty { display: grid; place-items: center; min-height: 420px; color: var(--muted); text-align: center; padding: 40px; }

.pin {
  position: absolute; transform: translate(-50%, -50%);
  width: 18px; height: 18px; border-radius: 50%;
  cursor: pointer; border: 2px solid rgba(255,255,255,.85);
  --c: var(--ok); --g: var(--ok-glow);
  background: var(--c); box-shadow: 0 0 0 2px rgba(0,0,0,.35), 0 0 14px var(--g);
  transition: transform .1s;
}
.pin:hover { transform: translate(-50%, -50%) scale(1.25); z-index: 5; }
.pin.ok    { --c: var(--ok);    --g: var(--ok-glow); }
.pin.warn  { --c: var(--warn);  --g: var(--warn-glow); }
.pin.alarm { --c: var(--alarm); --g: var(--alarm-glow); animation: pinpulse 1.2s ease-in-out infinite; }
.pin.draggable { cursor: grab; }
.pin.draggable:active { cursor: grabbing; }
.pin .pin-label {
  position: absolute; left: 50%; top: -8px; transform: translate(-50%, -100%);
  background: var(--panel); border: 1px solid var(--border); color: var(--text);
  padding: 2px 7px; border-radius: 6px; font-size: 11px; white-space: nowrap;
  font-family: var(--font-mono); box-shadow: var(--shadow-sm); pointer-events: none;
  opacity: 0; transition: opacity .12s;
}
.pin:hover .pin-label { opacity: 1; }

@keyframes pinpulse {
  0%,100% { box-shadow: 0 0 0 2px rgba(0,0,0,.35), 0 0 10px var(--g); }
  50%     { box-shadow: 0 0 0 7px color-mix(in srgb, var(--c) 22%, transparent), 0 0 22px var(--g); }
}

/* Popup μετρητή */
.popup {
  position: absolute; z-index: 20; width: 240px;
  background: var(--panel); border: 1px solid var(--border-2);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 14px;
  transform: translate(-50%, calc(-100% - 16px));
}
.popup::after {
  content: ""; position: absolute; left: 50%; bottom: -7px; transform: translateX(-50%) rotate(45deg);
  width: 12px; height: 12px; background: var(--panel); border-right: 1px solid var(--border-2); border-bottom: 1px solid var(--border-2);
}
.popup .pp-h { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.popup .pp-h .name { font-weight: 650; font-size: 14px; }
.popup .pp-val { font-family: var(--font-mono); font-size: 30px; font-weight: 600; line-height: 1; }
.popup .pp-val .u { font-size: 14px; color: var(--muted); margin-left: 3px; }
.popup .pp-meta { margin-top: 8px; display: grid; grid-template-columns: auto auto; gap: 4px 12px; font-size: 12px; color: var(--muted); }
.popup .pp-meta b { font-family: var(--font-mono); color: var(--text); font-weight: 600; }
.popup .pp-close { cursor: pointer; color: var(--muted); border: none; background: none; font-size: 18px; line-height: 1; padding: 0; }
.popup .pp-close:hover { color: var(--text); }

/* --------------------------------------------------------------- Tables */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.table th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
.table tbody tr:hover { background: var(--panel-2); }
.table td.num, .table th.num { text-align: right; font-family: var(--font-mono); }
.table .actions { display: flex; gap: 6px; justify-content: flex-end; }

/* --------------------------------------------------------------- Tabs (config) */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 18px; flex-wrap: wrap; }
.tabs button {
  appearance: none; cursor: pointer; background: none; border: none;
  font-family: inherit; font-size: 14px; font-weight: 550; color: var(--muted);
  padding: 10px 14px; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tabs button:hover { color: var(--text); }
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); }
.tabpane { display: none; }
.tabpane.active { display: block; }

/* --------------------------------------------------------------- Login */
.login-screen { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.login-card {
  width: 100%; max-width: 380px;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; box-shadow: var(--shadow); padding: 30px 28px;
}
.login-card .brand { justify-content: center; font-size: 20px; margin-bottom: 4px; }
.login-card .tagline { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 24px; }
.login-card .corner { position: fixed; top: 16px; right: 16px; display: flex; gap: 8px; }

/* --------------------------------------------------------------- Misc */
.toast-host { position: fixed; right: 18px; bottom: 18px; z-index: 100; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--panel); border: 1px solid var(--border-2);
  border-left: 3px solid var(--accent); border-radius: var(--radius-sm);
  padding: 11px 14px; box-shadow: var(--shadow); font-size: 14px; max-width: 340px;
  animation: slidein .2s ease;
}
.toast.err { border-left-color: var(--alarm); }
.toast.ok { border-left-color: var(--ok); }
@keyframes slidein { from { transform: translateX(20px); opacity: 0; } to { transform: none; opacity: 1; } }

.empty {
  text-align: center; color: var(--muted); padding: 40px 20px;
}
.chips { display: flex; gap: 8px; flex-wrap: wrap; }

.gauge-mini { display: flex; align-items: center; gap: 10px; }
.gauge-mini .gv { font-family: var(--font-mono); font-size: 18px; font-weight: 600; }

.muted { color: var(--muted); }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.hidden { display: none !important; }

.chart-wrap { position: relative; height: 360px; }
.chart-wrap.short { height: 240px; }

.ws-dot { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.ws-dot .led { width: 9px; height: 9px; }

/* Segmented control (2D/3D) */
.seg { display: inline-flex; background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 3px; gap: 3px; }
.seg button {
  appearance: none; cursor: pointer; border: none; background: none;
  font-family: inherit; font-size: 13px; font-weight: 600; color: var(--muted);
  padding: 6px 16px; border-radius: 6px; transition: background .15s, color .15s;
}
.seg button:hover { color: var(--text); }
.seg button.active { background: var(--accent); color: #03252e; }

@media (max-width: 720px) {
  .nav { display: none; }
  .appbar { gap: 10px; padding: 0 12px; }
  .wrap { padding: 16px 12px 50px; }
  .nav.mobile { display: flex; position: fixed; bottom: 0; left: 0; right: 0;
    background: var(--panel); border-top: 1px solid var(--border); padding: 6px;
    justify-content: space-around; z-index: 60; }
  .nav.mobile a { flex: 1; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  .led.alarm, .pin.alarm { animation: none; }
  .toast { animation: none; }
}
