/* ============================================================
   Growatt Solar Dashboard — Stylesheet
   ============================================================ */

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --bg-base:          #080c10;
  --bg-panel:         #0d1318;
  --bg-card:          #111820;
  --bg-card2:         #141c24;
  --border:           #1e2d3d;
  --border-bright:    #2a3f55;

  --accent-solar:     #f5a623;
  --accent-solar-dim: rgba(245,166,35,0.15);
  --accent-grid:      #4a9eff;
  --accent-grid-dim:  rgba(74,158,255,0.12);
  --accent-bat:       #3ecf8e;
  --accent-bat-dim:   rgba(62,207,142,0.12);
  --accent-load:      #c084fc;
  --accent-load-dim:  rgba(192,132,252,0.12);
  --accent-red:       #f87171;
  --accent-red-dim:   rgba(248,113,113,0.12);

  --text-primary:     #e8edf2;
  --text-secondary:   #7a9ab5;
  --text-muted:       #3d5470;

  --glow-solar: 0 0 20px rgba(245,166,35,0.3);
  --glow-bat:   0 0 20px rgba(62,207,142,0.25);

  --radius:    12px;
  --radius-sm:  8px;
}

/* ── Reset & Base ───────────────────────────────────────────── */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'JetBrains Mono', monospace;
  background: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background-image:
    linear-gradient(rgba(74,158,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(74,158,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

::-webkit-scrollbar       { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 3px; }

/* ── Animations ─────────────────────────────────────────────── */
@keyframes pulse-dot  { 0%,100%{opacity:1} 50%{opacity:.4} }
@keyframes pulse-fault{ 0%,100%{opacity:1} 50%{opacity:.6} }
@keyframes spin       { to{transform:rotate(360deg)} }

/* ── Header ─────────────────────────────────────────────────── */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(8,12,16,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 60px;
}

.header-brand { display: flex; align-items: center; gap: 12px; }
.header-right { display: flex; align-items: center; gap: 12px; }

.brand-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent-solar), #e07b00);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: var(--glow-solar);
}

.brand-name {
  font-family: 'Syne', sans-serif;
  font-weight: 800; font-size: 1.1rem; letter-spacing: 0.05em;
}

.brand-sub {
  font-size: 0.65rem; color: var(--text-secondary);
  letter-spacing: 0.12em; text-transform: uppercase; margin-top: 1px;
}

.timestamp { font-size: 0.65rem; color: var(--text-muted); letter-spacing: 0.06em; }

.status-badge {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: 20px;
  font-size: 0.7rem; letter-spacing: 0.08em;
  border: 1px solid var(--border); background: var(--bg-panel);
}

.status-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-red);
  animation: pulse-dot 2s ease-in-out infinite;
}
.status-dot.online { background: var(--accent-bat); box-shadow: 0 0 8px var(--accent-bat); }
.status-dot.error  { background: var(--accent-red); box-shadow: 0 0 8px var(--accent-red); }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-bright);
  background: var(--bg-card); color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem; cursor: pointer;
  transition: all 0.2s; letter-spacing: 0.04em;
}
.btn:hover     { background: var(--bg-card2); border-color: var(--accent-grid); color: var(--accent-grid); }
.btn-admin     { border-color: var(--accent-solar); color: var(--accent-solar); }
.btn-admin:hover { background: var(--accent-solar-dim); }

.btn-primary {
  padding: 8px 20px; border-radius: var(--radius-sm);
  border: 1px solid var(--accent-solar);
  background: linear-gradient(135deg, var(--accent-solar), #e07b00);
  color: #000; font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem; font-weight: 700; cursor: pointer;
  letter-spacing: 0.06em; transition: opacity 0.2s;
}
.btn-primary:hover { opacity: 0.85; }

.btn-write {
  padding: 5px 10px; font-size: 0.65rem;
  border-radius: 6px; border: 1px solid var(--accent-bat);
  background: var(--accent-bat-dim); color: var(--accent-bat);
  cursor: pointer; font-family: 'JetBrains Mono', monospace;
  transition: all 0.2s; white-space: nowrap;
}
.btn-write:hover   { background: rgba(62,207,142,0.25); }
.btn-write.writing { opacity: 0.5; cursor: wait; }
.btn-write.success { border-color: var(--accent-bat); color: var(--accent-bat); }
.btn-write.error   { border-color: var(--accent-red); color: var(--accent-red); }

.priority-btn {
  padding: 5px 10px; border-radius: 6px;
  border: 1px solid var(--border); background: var(--bg-panel);
  color: var(--text-muted); font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem; cursor: pointer;
  transition: all 0.2s; letter-spacing: 0.04em;
}
.priority-btn.active-0 { border-color:var(--accent-load); color:var(--accent-load); background:var(--accent-load-dim); }
.priority-btn.active-1 { border-color:var(--accent-bat);  color:var(--accent-bat);  background:var(--accent-bat-dim); }
.priority-btn.active-2 { border-color:var(--accent-grid); color:var(--accent-grid); background:var(--accent-grid-dim); }

/* ── Layout ──────────────────────────────────────────────────── */
.main {
  position: relative; z-index: 1;
  padding: 20px 24px 40px;
  max-width: 1600px; margin: 0 auto;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr;        gap: 16px; margin-bottom: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr;    gap: 16px; margin-bottom: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr);  gap: 16px; margin-bottom: 16px; }

/* ── Energy Flow — SVG hvězdicové schéma ────────────────────── */
@keyframes flow-dash {
  to { stroke-dashoffset: -24; }
}
@keyframes flow-dash-rev {
  to { stroke-dashoffset: 24; }
}
@keyframes pulse-hub {
  0%,100% { opacity:.7; r: 28; }
  50%      { opacity:1;  r: 30; }
}
@keyframes node-glow {
  0%,100% { box-shadow: 0 0 0 0 transparent; }
  50%     { box-shadow: 0 0 20px 2px var(--ef-color, #f5a623); }
}

.ef-wrap {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 20px;
  overflow: hidden;
  position: relative;
}

/* Rainbow top border */
.ef-wrap::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg,
    var(--accent-solar) 0%,
    var(--accent-solar) 25%,
    var(--accent-bat) 45%,
    var(--accent-grid) 65%,
    var(--accent-load) 100%);
}

.ef-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px 0;
}
.ef-title {
  font-family: 'Syne', sans-serif;
  font-size: 0.68rem; font-weight: 700;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--text-secondary);
}
.ef-status {
  font-size: 0.62rem; color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* 3-column layout */
.ef-body {
  display: grid;
  grid-template-columns: 180px 1fr 180px;
  gap: 0;
  padding: 12px 16px 16px;
  min-height: 260px;
}

/* Left / Right columns */
.ef-col {
  display: flex; flex-direction: column;
  justify-content: space-around; gap: 12px;
}

/* Individual node */
.ef-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 14px;
  display: flex; flex-direction: column; gap: 3px;
  position: relative;
  transition: border-color 0.4s, box-shadow 0.4s;
  overflow: hidden;
}
.ef-node::after {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  border-radius: 10px 0 0 10px;
}

.ef-solar  { --ef-color: var(--accent-solar); }
.ef-solar::after  { background: var(--accent-solar); }
.ef-battery{ --ef-color: var(--accent-bat); }
.ef-battery::after{ background: var(--accent-bat); }
.ef-load   { --ef-color: var(--accent-load); }
.ef-load::after   { background: var(--accent-load); }
.ef-grid   { --ef-color: var(--accent-grid); }
.ef-grid::after   { background: var(--accent-grid); }

.ef-node.ef-active {
  border-color: var(--ef-color);
  box-shadow: 0 0 16px rgba(var(--ef-color-rgb, 245,166,35), 0.15);
}

.ef-node-icon  { font-size: 22px; line-height: 1; }
.ef-node-name  {
  font-size: 0.58rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--text-muted); margin-top: 2px;
}
.ef-node-power {
  font-family: 'Syne', sans-serif;
  font-size: 1.35rem; font-weight: 800; line-height: 1.1;
  color: var(--ef-color);
}
.ef-node-sub {
  font-size: 0.6rem; color: var(--text-muted);
}

/* SOC mini bar inside battery node */
.ef-soc-bar {
  width: 100%; height: 4px;
  background: var(--bg-panel);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 6px;
}
.ef-soc-fill {
  height: 100%; border-radius: 2px;
  transition: width 1.2s ease, background 0.5s;
  background: var(--accent-bat);
}
.ef-bat-soc { color: var(--accent-bat) !important; font-size: 1.6rem !important; }

/* Battery node — dvousloupcový vnitřek */
.ef-node-top {
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.ef-bat-right {
  text-align: right; flex: 1;
}
.ef-bat-power-row {
  display: flex; align-items: center; justify-content: flex-end; gap: 4px;
  margin-top: 2px;
}
.ef-bat-dir {
  font-size: 0.75rem; font-weight: 700;
}
.ef-bat-dir.charging    { color: var(--accent-bat); }
.ef-bat-dir.discharging { color: #f87171; }
.ef-bat-watts {
  font-size: 0.72rem; font-weight: 600; color: var(--text-secondary);
}

/* SVG center */
.ef-center {
  position: relative;
  display: flex; align-items: center; justify-content: center;
}

.ef-svg {
  width: 100%; height: 100%;
  max-height: 240px;
  overflow: visible;
}

/* Animated SVG paths */
/* Animace řízena přes style.animation v JS */
.ef-path {
  transition: stroke 0.5s, opacity 0.5s;
}

/* path labels removed */

/* Responsive */
@media (max-width: 900px) {
  .ef-body { grid-template-columns: 1fr; }
  .ef-center { min-height: 200px; }
  .ef-col { flex-direction: row; flex-wrap: wrap; }
  .ef-node { flex: 1 1 140px; }
}

/* ── Cards ───────────────────────────────────────────────────── */
.card { background:var(--bg-card); border:1px solid var(--border); border-radius:var(--radius); overflow:hidden; }

.card-header {
  padding: 14px 18px 10px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}

.card-title {
  font-family: 'Syne', sans-serif; font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-secondary); display: flex; align-items: center; gap: 8px;
}
.card-title .dot { width:6px; height:6px; border-radius:50%; }

.card-body { padding: 16px 18px; }

/* ── Stat rows ───────────────────────────────────────────────── */
.stat-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 0; border-bottom: 1px solid rgba(30,45,61,0.5);
}
.stat-row:last-child { border-bottom: none; }

.stat-label { font-size:0.68rem; color:var(--text-secondary); letter-spacing:0.04em; }
.stat-value { font-size:0.78rem; color:var(--text-primary); font-weight:500; }
.stat-value.highlight-solar { color:var(--accent-solar); }
.stat-value.highlight-bat   { color:var(--accent-bat); }
.stat-value.highlight-grid  { color:var(--accent-grid); }
.stat-value.highlight-red   { color:var(--accent-red); }

/* ── Battery gauge ───────────────────────────────────────────── */
.battery-gauge { padding: 16px 18px; }
.soc-display   { display:flex; align-items:flex-end; gap:8px; margin-bottom:12px; }

.soc-number {
  font-family:'Syne',sans-serif; font-size:3rem; font-weight:800; line-height:1;
  color:var(--accent-bat); text-shadow:var(--glow-bat);
}
.soc-unit { font-size:1rem; color:var(--text-secondary); margin-bottom:6px; }

.soc-bar-track {
  width:100%; height:10px; background:var(--bg-panel);
  border:1px solid var(--border); border-radius:5px; overflow:hidden; margin-bottom:8px;
}
.soc-bar-fill {
  height:100%; border-radius:5px;
  transition: width 1s ease, background 0.5s;
  position:relative;
}
.soc-bar-fill::after {
  content:''; position:absolute; top:0; right:0;
  width:4px; height:100%; background:rgba(255,255,255,0.4); border-radius:2px;
}

.soc-cells { display:flex; gap:3px; margin-top:12px; flex-wrap:wrap; }
.cell-box {
  width:calc((100% - 45px) / 16); height:24px; border-radius:3px;
  background:var(--bg-panel); border:1px solid var(--border);
  display:flex; align-items:center; justify-content:center;
  font-size:0.5rem; color:var(--text-muted); transition:all 0.3s;
}

/* ── Charts ──────────────────────────────────────────────────── */
.chart-wrap { position:relative; height:160px; padding:8px 0; }

/* ── Settings panel ──────────────────────────────────────────── */
.setting-item {
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 0; border-bottom:1px solid rgba(30,45,61,0.5); gap:12px;
}
.setting-item:last-child { border-bottom:none; }

.setting-label   { font-size:0.68rem; color:var(--text-secondary); flex:1; }
.setting-desc    { font-size:0.58rem; color:var(--text-muted); margin-top:2px; }
.setting-control { display:flex; align-items:center; gap:8px; }

.setting-input {
  width:80px; padding:5px 8px;
  background:var(--bg-panel); border:1px solid var(--border-bright);
  border-radius:var(--radius-sm); color:var(--text-primary);
  font-family:'JetBrains Mono',monospace; font-size:0.75rem;
  text-align:right; outline:none; transition:border-color 0.2s;
}
.setting-input:focus { border-color:var(--accent-grid); }

/* ── Fault indicators ────────────────────────────────────────── */
.fault-indicator {
  display:inline-flex; align-items:center; gap:6px;
  padding:4px 10px; border-radius:20px; font-size:0.65rem; font-weight:500;
}
.fault-indicator.ok    { background:rgba(62,207,142,0.1);  color:var(--accent-bat);   border:1px solid rgba(62,207,142,0.2); }
.fault-indicator.fault { background:rgba(248,113,113,0.1); color:var(--accent-red);   border:1px solid rgba(248,113,113,0.2); animation:pulse-fault 1.5s ease-in-out infinite; }
.fault-indicator.warn  { background:rgba(245,166,35,0.1);  color:var(--accent-solar); border:1px solid rgba(245,166,35,0.2); }

/* ── System info ─────────────────────────────────────────────── */
.section-label {
  font-family:'Syne',sans-serif; font-size:0.62rem; font-weight:600;
  letter-spacing:0.18em; text-transform:uppercase;
  color:var(--text-muted); padding-bottom:8px; margin-bottom:12px;
  border-bottom:1px solid var(--border);
}

.info-grid { display:grid; grid-template-columns:1fr 1fr; gap:8px; }
.info-item { padding:10px 12px; background:var(--bg-panel); border:1px solid var(--border); border-radius:var(--radius-sm); }
.info-item-label { font-size:0.6rem; color:var(--text-muted); letter-spacing:0.1em; text-transform:uppercase; margin-bottom:4px; }
.info-item-value { font-size:0.8rem; color:var(--text-primary); word-break:break-all; }

/* ── Modal ───────────────────────────────────────────────────── */
.modal-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,0.75);
  backdrop-filter:blur(8px); z-index:1000;
  display:none; align-items:center; justify-content:center;
}
.modal-overlay.open { display:flex; }

.modal {
  background:var(--bg-card); border:1px solid var(--border-bright);
  border-radius:var(--radius); width:680px; max-width:95vw; max-height:85vh;
  overflow:hidden; display:flex; flex-direction:column;
  box-shadow:0 0 60px rgba(0,0,0,0.8);
}

.modal-header {
  padding:18px 24px; border-bottom:1px solid var(--border);
  display:flex; align-items:center; justify-content:space-between; flex-shrink:0;
}
.modal-title { font-family:'Syne',sans-serif; font-size:0.9rem; font-weight:700; }
.modal-body  { padding:20px 24px; overflow-y:auto; flex:1; }
.modal-footer {
  padding:14px 24px; border-top:1px solid var(--border);
  display:flex; justify-content:flex-end; gap:10px; flex-shrink:0;
}

/* ── Tabs ────────────────────────────────────────────────────── */
.tabs { display:flex; border-bottom:1px solid var(--border); }
.tab {
  padding:12px 20px; font-size:0.68rem;
  font-family:'JetBrains Mono',monospace; letter-spacing:0.08em;
  color:var(--text-muted); cursor:pointer;
  border-bottom:2px solid transparent; transition:all 0.2s; text-transform:uppercase;
}
.tab.active           { color:var(--text-primary); border-bottom-color:var(--accent-solar); }
.tab:hover:not(.active){ color:var(--text-secondary); }
.tab-content          { display:none; padding-top:16px; }
.tab-content.active   { display:block; }

.config-textarea {
  width:100%; height:360px; background:var(--bg-base);
  border:1px solid var(--border-bright); border-radius:var(--radius-sm);
  color:var(--accent-bat); font-family:'JetBrains Mono',monospace;
  font-size:0.72rem; padding:14px; resize:vertical; outline:none; line-height:1.6;
}
.config-textarea:focus { border-color:var(--accent-grid); }

/* ── Toast ───────────────────────────────────────────────────── */
.toast {
  position:fixed; bottom:24px; right:24px;
  padding:12px 20px; border-radius:var(--radius-sm);
  border:1px solid var(--border); background:var(--bg-card);
  font-size:0.72rem; z-index:2000;
  transform:translateY(80px); opacity:0; transition:all 0.3s; max-width:320px;
}
.toast.show    { transform:translateY(0); opacity:1; }
.toast.success { border-color:var(--accent-bat); color:var(--accent-bat); }
.toast.error   { border-color:var(--accent-red); color:var(--accent-red); }

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width:1200px) {
  .grid-4 { grid-template-columns:1fr 1fr; }
}
@media (max-width:768px) {
  .grid-2,.grid-3 { grid-template-columns:1fr; }
  .main { padding:12px; }
}