/* =========================================================================
   STYLE.CSS — shared across all pages
   Design language: a control-room HMI panel. Dark slate, cyan "live" glow,
   amber for readouts, monospace digits — the same visual family as the
   meter screens on the plant floor, not a generic web dashboard.
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');

:root{
  --bg-0:#f6f7f9;
  --bg-1:#ffffff;
  --bg-2:#f0f2f5;
  --panel-border:#dfe3e8;
  --text-hi:#1a222c;
  --text-mid:#586572;
  --text-dim:#8a95a3;
  --cyan:#0c8fa0;
  --cyan-dim:#bdeaf0;
  --amber:#c17a1e;
  --amber-dim:#f6e3c2;
  --red:#d1373c;
  --green:#2fa563;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
  --sans: 'IBM Plex Sans', system-ui, sans-serif;
}

*{ box-sizing:border-box; }

html,body{
  margin:0; padding:0;
  background:var(--bg-0);
  color:var(--text-hi);
  font-family:var(--sans);
  min-height:100vh;
}

body{
  background-image:
    radial-gradient(circle at 20% -10%, rgba(12,143,160,0.06), transparent 45%),
    repeating-linear-gradient(0deg, rgba(0,0,0,0.012) 0px, rgba(0,0,0,0.012) 1px, transparent 1px, transparent 3px);
}

a{ color:inherit; text-decoration:none; }
button, input, select{ font-family:inherit; }

/* ---------- Top bar ---------- */
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  gap:16px;
  padding:14px 24px;
  background:var(--bg-1);
  border-bottom:1px solid var(--panel-border);
  flex-wrap:wrap;
}
.topbar-left{ display:flex; align-items:center; gap:14px; }
.plant-id{ display:flex; flex-direction:column; line-height:1.15; }
.plant-id .name{ font-weight:700; letter-spacing:.04em; font-size:15px; }
.plant-id .sub{ font-size:11.5px; color:var(--text-dim); letter-spacing:.06em; text-transform:uppercase; }

.clock{
  font-family:var(--mono);
  font-size:13px;
  color:var(--text-mid);
  display:flex; flex-direction:column; align-items:flex-end; line-height:1.3;
}
.clock .time{ color:var(--cyan); font-size:16px; font-weight:600; }

.status-led{
  display:inline-flex; align-items:center; gap:7px;
  font-family:var(--mono); font-size:11px; letter-spacing:.08em;
  color:var(--text-dim); text-transform:uppercase;
}
.dot{
  width:8px; height:8px; border-radius:50%;
  background:var(--green);
  box-shadow:0 0 8px var(--green);
  animation:pulse 1.6s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ opacity:1; } 50%{ opacity:.35; } }

/* ---------- Nav ---------- */
.nav{
  display:flex; gap:4px;
  padding:0 24px;
  background:var(--bg-1);
  border-bottom:1px solid var(--panel-border);
}
.nav a{
  padding:11px 16px;
  font-size:12.5px; letter-spacing:.05em; text-transform:uppercase;
  color:var(--text-mid);
  border-bottom:2px solid transparent;
}
.nav a.active{ color:var(--cyan); border-bottom-color:var(--cyan); }
.nav a:hover{ color:var(--text-hi); }
.nav-spacer{ flex:1; }
.logout-link{ padding:11px 16px; font-size:12.5px; color:var(--text-dim); text-transform:uppercase; letter-spacing:.05em; }
.logout-link:hover{ color:var(--red); }

/* ---------- Layout ---------- */
.page{ max-width:1200px; margin:0 auto; padding:24px; }
.panel{
  background:var(--bg-1);
  border:1px solid var(--panel-border);
  border-radius:6px;
}
.panel-title{
  font-size:11.5px; letter-spacing:.1em; text-transform:uppercase;
  color:var(--text-dim); padding:14px 18px; border-bottom:1px solid var(--panel-border);
}

/* ---------- Stat cards (today/yesterday) ---------- */
.stat-row{ display:grid; grid-template-columns:1fr 1fr; gap:16px; margin-bottom:20px; }
.stat-card{
  background:var(--bg-1); border:1px solid var(--panel-border); border-radius:6px;
  padding:18px 22px;
}
.stat-card .label{ font-size:11.5px; letter-spacing:.09em; text-transform:uppercase; color:var(--text-dim); }
.stat-card .value{
  font-family:var(--mono); font-weight:600; font-size:36px; margin-top:8px;
  display:flex; align-items:baseline; gap:8px;
}
.stat-card .unit{ font-size:15px; color:var(--text-dim); font-weight:500; }
.stat-card.today .value{ color:var(--cyan); }
.stat-card.yesterday .value{ color:var(--amber); }

/* ---------- Chart ---------- */
.chart-wrap{ padding:20px; }
.chart{
  display:flex; align-items:flex-end; gap:4px; height:280px;
  border-left:1px solid var(--panel-border); border-bottom:1px solid var(--panel-border);
  padding:10px 10px 0 10px; position:relative;
}
.chart .bar{
  flex:1; min-width:0;
  background:linear-gradient(180deg, var(--cyan), var(--cyan-dim));
  border-radius:2px 2px 0 0;
  position:relative;
  transition:height .4s ease;
}
.chart .bar .val{
  position:absolute; top:-18px; left:50%; transform:translateX(-50%);
  font-family:var(--mono); font-size:10px; color:var(--text-mid); white-space:nowrap;
}
.chart-axis{ display:flex; gap:4px; padding:6px 10px 0 10px; }
.chart-axis span{ flex:1; text-align:center; font-size:9.5px; color:var(--text-dim); font-family:var(--mono); }

/* ---------- Meters grid ---------- */
.meter-grid{
  display:grid; grid-template-columns:repeat(auto-fill, minmax(270px,1fr));
  gap:16px; padding:20px;
}
.meter-card{
  background:var(--bg-2); border:1px solid var(--panel-border); border-radius:6px; overflow:hidden;
}
.meter-card .meter-name{
  padding:10px 14px; font-size:13px; font-weight:600; letter-spacing:.03em;
  background:var(--bg-1); border-bottom:1px solid var(--panel-border);
  display:flex; align-items:center; justify-content:space-between;
}
.meter-card .meter-name .edit-hint{
  font-family:var(--mono); font-size:9.5px; color:var(--text-dim); text-transform:none; letter-spacing:0;
}
.meter-img{
  height:290px; display:flex; align-items:center; justify-content:center;
  background:repeating-linear-gradient(45deg, #eef1f4, #eef1f4 8px, #e5e9ed 8px, #e5e9ed 16px);
  color:var(--text-dim); font-size:11px; letter-spacing:.05em;
}
.meter-img img{ width:100%; height:100%; object-fit:cover; }
.meter-fields{ display:grid; grid-template-columns:1fr 1fr; gap:0; }
.field{
  padding:9px 14px; border-top:1px solid var(--panel-border);
  display:flex; flex-direction:column; gap:2px;
}
.field:nth-child(odd){ border-right:1px solid var(--panel-border); }
.field .k{ font-size:10px; color:var(--text-dim); letter-spacing:.06em; }
.field .v{ font-family:var(--mono); font-size:14px; color:var(--text-hi); font-weight:600; }

/* ---------- Forms ---------- */
.form-row{ display:flex; flex-direction:column; gap:6px; margin-bottom:16px; }
.form-row label{ font-size:11.5px; letter-spacing:.06em; text-transform:uppercase; color:var(--text-dim); }
.form-row input, .form-row select{
  background:var(--bg-2); border:1px solid var(--panel-border); border-radius:4px;
  padding:10px 12px; color:var(--text-hi); font-size:14px;
}
.form-row input:focus, .form-row select:focus{ outline:none; border-color:var(--cyan); }

.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  background:var(--cyan); color:#04191b; font-weight:700; font-size:13px;
  letter-spacing:.04em; text-transform:uppercase;
  border:none; border-radius:4px; padding:12px 20px; cursor:pointer;
  transition:filter .15s ease;
}
.btn:hover{ filter:brightness(1.1); }
.btn.secondary{ background:transparent; color:var(--text-mid); border:1px solid var(--panel-border); }
.btn.secondary:hover{ color:var(--text-hi); border-color:var(--text-dim); }

.error-msg{
  color:var(--red); font-size:13px; font-family:var(--mono);
  min-height:18px;
}

/* ---------- Login page ---------- */
.login-shell{
  min-height:100vh; display:flex; align-items:center; justify-content:center; padding:20px;
}
.login-card{
  width:100%; max-width:380px;
  background:var(--bg-1); border:1px solid var(--panel-border); border-radius:8px;
  padding:32px 30px;
}
.login-card .brand{ text-align:center; margin-bottom:26px; }
.login-card .brand .name{ font-weight:700; font-size:17px; letter-spacing:.03em; }
.login-card .brand .sub{ font-size:11.5px; color:var(--text-dim); letter-spacing:.08em; text-transform:uppercase; margin-top:4px; }
.login-card .btn{ width:100%; margin-top:6px; }

/* ---------- Reports table ---------- */
table.report-table{ width:100%; border-collapse:collapse; font-family:var(--mono); font-size:12.5px; }
table.report-table th, table.report-table td{
  padding:8px 12px; border-bottom:1px solid var(--panel-border); text-align:left;
}
table.report-table th{ color:var(--text-dim); font-weight:600; letter-spacing:.05em; text-transform:uppercase; font-size:10.5px; }

.section-gap{ margin-top:20px; }

/* ---------- Responsive ---------- */
@media (max-width:640px){
  .stat-row{ grid-template-columns:1fr; }
  .chart{ height:200px; }
  .clock{ align-items:flex-start; }
}