/*
 * ═══════════════════════════════════════════════════════════════
 *  TEMA 1 — "GRID"
 *  Estetica: Industrial Tech / Monitoraggio sistemi
 *  Palette: Nero profondo + Ciano elettrico
 *  Font: JetBrains Mono (display) + DM Sans (body)
 *
 *  Uso: collega questo file in ogni pagina del sito.
 *  Le variabili :root coprono colori, spazi e tipografia
 *  in modo uniforme su login, dashboard, e tutte le sezioni.
 * ═══════════════════════════════════════════════════════════════
 */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@300;400;500;700&family=DM+Sans:wght@300;400;500&display=swap');

/* ── Variabili globali ──────────────────────────────────────── */
:root {
  /* Colori base */
  --bg:           #080c10;
  --bg-2:         #0d1117;
  --bg-3:         #121920;
  --surface:      #111820;
  --surface-2:    #192230;

  /* Bordi */
  --border:       rgba(0, 210, 255, 0.12);
  --border-hover: rgba(0, 210, 255, 0.35);

  /* Accenti */
  --accent:       #ff4557;
  --accent-dim:   rgba(0, 210, 255, 0.08);
  --accent-glow:  rgba(0, 210, 255, 0.2);
  --accent-2:     #00ff9d;   /* secondo accento per grafici/stato OK */
  --danger:       #e61a13;
  --warn:         #ffaa00;

  /* Testo */
  --text:         #d0e8f0;
  --text-2:       rgba(208, 232, 240, 0.55);
  --text-3:       rgba(208, 232, 240, 0.25);

  /* Tipografia */
  --font-display: 'JetBrains Mono', monospace;
  --font-body:    'DM Sans', sans-serif;

  /* Spazi */
  --radius:       2px;
  --gap:          1.5rem;
  --gap-sm:       0.75rem;

  /* Transizioni */
  --ease:         0.25s ease;
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 15px;
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Sfondo scanline ────────────────────────────────────────── */
body::before {
  content: '';
  position: fixed; inset: 0; z-index: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 2px,
      rgba(0,210,255,0.015) 2px,
      rgba(0,210,255,0.015) 4px
    );
  pointer-events: none;
}

/* ── Layout pagina ──────────────────────────────────────────── */
.page {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

/* ── Sidebar layout (dashboard) ─────────────────────────────── */
.layout {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: auto 1fr;
  min-height: 100vh;
}

/* ── Topbar ─────────────────────────────────────────────────── */
.topbar {
  grid-column: 1 / -1;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.topbar .brand {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-transform: uppercase;
}

.topbar .brand span {
  color: var(--text-2);
  font-weight: 300;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--text-2);
}

/* ── Sidebar ─────────────────────────────────────────────────── */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.5rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-label {
  font-family: var(--font-display);
  font-size: 0.58rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 1rem 1.5rem 0.4rem;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 1.5rem;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--text-2);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: all var(--ease);
  cursor: pointer;
}

.nav-item:hover {
  background: var(--accent-dim);
  color: var(--text);
  border-left-color: var(--border-hover);
}

.nav-item.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-left-color: var(--accent);
}

.nav-item .icon {
  width: 16px;
  text-align: center;
  font-size: 0.9rem;
  opacity: 0.7;
}

/* ── Main content ────────────────────────────────────────────── */
.main {
  padding: 2rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

/* ── Card ────────────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  animation: fadeUp 0.5s ease both;
  transition: border-color var(--ease);
}

.card:hover { border-color: var(--border-hover); }

/* angolo decorativo ciano */
.card::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px;
  width: 24px; height: 24px;
  border-top: 1px solid var(--accent);
  border-left: 1px solid var(--accent);
  border-radius: var(--radius);
}

.card-title {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.card-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── Griglia sensori ─────────────────────────────────────────── */
.sensor-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--gap-sm);
}

.sensor-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: all var(--ease);
}

.sensor-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.sensor-label {
  font-family: var(--font-display);
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 0.6rem;
}

.sensor-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 300;
  color: var(--text);
  line-height: 1;
}

.sensor-value .unit {
  font-size: 0.75rem;
  color: var(--text-2);
  margin-left: 0.2rem;
}

.sensor-status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.6rem;
  font-size: 0.65rem;
  font-family: var(--font-display);
  letter-spacing: 0.1em;
}

.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-3);
}
.dot.ok      { background: var(--accent-2); box-shadow: 0 0 6px var(--accent-2); }
.dot.warn    { background: var(--warn);     box-shadow: 0 0 6px var(--warn); }
.dot.danger  { background: var(--danger);   box-shadow: 0 0 6px var(--danger); }

/* ── Badge stato ─────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.badge.ok     { background: rgba(0,255,157,0.1); color: var(--accent-2); border: 1px solid rgba(0,255,157,0.2); }
.badge.warn   { background: rgba(255,170,0,0.1); color: var(--warn);     border: 1px solid rgba(255,170,0,0.2); }
.badge.danger { background: rgba(255,69,87,0.1); color: var(--danger);   border: 1px solid rgba(255,69,87,0.2); }

/* ── Form — LOGIN ────────────────────────────────────────────── */
.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 3rem 2.5rem;
  position: relative;
  animation: fadeUp 0.6s ease both;
}

.login-card::before {
  content: '';
  position: absolute;
  top: -1px; left: -1px;
  width: 30px; height: 30px;
  border-top: 1px solid var(--accent);
  border-left: 1px solid var(--accent);
}

.login-card::after {
  content: '';
  position: absolute;
  bottom: -1px; right: -1px;
  width: 30px; height: 30px;
  border-bottom: 1px solid var(--accent);
  border-right: 1px solid var(--accent);
}

.login-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.login-subtitle {
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 2.5rem;
}

/* ── Campi form ──────────────────────────────────────────────── */
.field { margin-bottom: 1.5rem; }

label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 0.5rem;
}

input[type="text"],
input[type="password"],
input[type="email"],
input[type="number"],
select,
textarea {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 300;
  padding: 0.65rem 0.9rem;
  outline: none;
  transition: border-color var(--ease), box-shadow var(--ease);
  -webkit-appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

input::placeholder { color: var(--text-3); }

/* ── Bottoni ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.5rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--ease);
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  width: 100%;
}
.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--text);
}

/* ── Messaggio errore ────────────────────────────────────────── */
.error-msg {
  background: rgba(255,69,87,0.08);
  border: 1px solid rgba(255,69,87,0.25);
  border-left: 2px solid var(--danger);
  color: #ff8090;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  padding: 0.7rem 0.9rem;
  border-radius: var(--radius);
  margin-bottom: 1.5rem;
  animation: shake 0.35s ease;
}

/* ── Tabella dati ────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

th {
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 0.6rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(0,210,255,0.05);
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 300;
}

tr:hover td { background: var(--accent-dim); }

/* ── Utilità ─────────────────────────────────────────────────── */
.text-accent  { color: var(--accent); }
.text-muted   { color: var(--text-2); }
.text-danger  { color: var(--danger); }
.text-ok      { color: var(--accent-2); }
.text-mono    { font-family: var(--font-display); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.flex { display: flex; align-items: center; gap: var(--gap-sm); }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }

/* ── Animazioni ──────────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
  0%,100% { transform: translateX(0); }
  25%      { transform: translateX(-5px); }
  75%      { transform: translateX(5px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

.pulse { animation: pulse 2s ease infinite; }

/* ── Scrollbar custom ────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 2px; }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .sensor-grid { grid-template-columns: repeat(2, 1fr); }
}