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

:root {
  --bg: #0a0e14;
  --panel: #10161f;
  --panel-2: #141c28;
  --border: #202a38;
  --text: #e6ebf2;
  --text-dim: #8593a6;
  --text-faint: #57647a;
  --blue: #3b82f6;
  --blue-soft: #93c5fd;
  --red: #ef4444;
  --red-soft: #fca5a5;
  --green: #22c55e;
  --amber: #f59e0b;
  --input-bg: #0c1219;
  --chart-grid: #1a2331;
  --hover-bg: #17202e;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --radius: 10px;
}

/* ---- light theme (toggled via data-theme on <html>, see app.js) ---- */
:root[data-theme="light"] {
  --bg: #f4f6fa;
  --panel: #ffffff;
  --panel-2: #eef1f6;
  --border: #d7dee7;
  --text: #10151f;
  --text-dim: #5b6779;
  --text-faint: #8b96a8;
  --blue-soft: #1d4ed8;
  --red-soft: #b91c1c;
  --input-bg: #eef1f6;
  --chart-grid: #cbd5e1;
  --hover-bg: #dde4ec;
}
:root[data-theme="light"] body {
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(59,130,246,0.06), transparent),
    radial-gradient(ellipse 700px 400px at 100% 0%, rgba(239,68,68,0.04), transparent);
}
:root[data-theme="light"] .topbar {
  background: rgba(255,255,255,0.85);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  transition: background-color .15s, color .15s;
  overflow-x: hidden;
}

body {
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(59,130,246,0.08), transparent),
    radial-gradient(ellipse 700px 400px at 100% 0%, rgba(239,68,68,0.05), transparent);
  background-attachment: fixed;
}

a { color: var(--blue-soft); }

/* ---- top bar ------------------------------------------------------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 16px;
  padding: 14px 22px;
  border-bottom: 1px solid var(--border);
  background: rgba(10,14,20,0.85);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--mono);
  letter-spacing: 0.04em;
}
.brand .mark { color: var(--blue); font-weight: 700; }
.brand .sep { color: var(--text-faint); }
.brand .page { color: var(--text-dim); font-size: 0.85rem; text-transform: uppercase; }

.nav {
  display: flex;
  gap: 4px;
}
.nav a {
  text-decoration: none;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid transparent;
}
.nav a.active {
  color: var(--text);
  border-color: var(--border);
  background: var(--panel-2);
}
.nav a:hover { color: var(--text); }

.transport-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
  padding: 3px;
  gap: 2px;
}
.transport-toggle-btn {
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 600;
  padding: 5px 12px;
  cursor: pointer;
}
.transport-toggle-btn:hover:not(:disabled) { color: var(--text); }
.transport-toggle-btn.active { color: #06101f; background: var(--blue); }
.transport-toggle-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.status-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--panel);
}
.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--text-faint);
  box-shadow: 0 0 0 0 rgba(0,0,0,0);
}
.dot.on {
  background: var(--green);
  box-shadow: 0 0 8px 1px rgba(34,197,94,0.7);
  animation: pulse 1.6s ease-in-out infinite;
}
.dot.warn { background: var(--amber); box-shadow: 0 0 8px 1px rgba(245,158,11,0.7); }
.dot.err { background: var(--red); box-shadow: 0 0 8px 1px rgba(239,68,68,0.7); }
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.45; }
}

/* ---- layout ---------------------------------------------------------- */
.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
}

.panel h2 {
  margin: 0 0 12px 0;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
}
.panel h2::before {
  content: '';
  width: 3px; height: 12px;
  background: var(--blue);
  display: inline-block;
  border-radius: 2px;
}

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid-2 { grid-template-columns: 1fr; } }

/* ---- buttons ---------------------------------------------------------- */
button {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.86rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  padding: 9px 16px;
  cursor: pointer;
  transition: border-color .15s, background .15s, transform .05s;
}
button:hover:not(:disabled) { border-color: var(--blue); background: var(--hover-bg); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary { background: var(--blue); border-color: var(--blue); color: #06101f; }
button.primary:hover:not(:disabled) { background: #5b96f8; }
button.danger { background: transparent; border-color: var(--red); color: var(--red-soft); }
button.danger:hover:not(:disabled) { background: rgba(239,68,68,0.1); }
button.ghost { background: transparent; }

/* ---- form controls ------------------------------------------------- */
label {
  font-family: var(--mono);
  font-size: 0.76rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
input[type=number], input[type=text], textarea, select {
  font-family: var(--mono);
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-size: 0.85rem;
}
input[type=range] { accent-color: var(--blue); }
textarea { width: 100%; resize: vertical; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label-spacer { visibility: hidden; }
.num-narrow { width: 110px; }

/* ---- log console ----------------------------------------------------- */
.console {
  background: #05070a;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: #9fe6a0;
  max-height: 220px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.console .err { color: var(--red-soft); }
.console .info { color: var(--blue-soft); }

/* ---- misc -------------------------------------------------------------- */
.muted { color: var(--text-dim); }
.small { font-size: 0.8rem; }
.chip {
  font-family: var(--mono);
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.progress {
  height: 8px;
  border-radius: 4px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  overflow: hidden;
}
.progress > div {
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--green));
  width: 0%;
  transition: width .2s;
}

/* ---- SPA view switching ------------------------------------------------ */
.view { display: none; }
.view.active { display: block; }

/* ---- field validation ---------------------------------------------------- */
.field-error { color: var(--red-soft); font-size: 0.78rem; margin-top: 4px; min-height: 1.1em; }
input.invalid, select.invalid { border-color: var(--red); box-shadow: 0 0 0 3px rgba(239,68,68,0.12); }

/* ---- settings tabs -------------------------------------------------------- */
.tabs-container { display: flex; flex-direction: column; gap: 16px; }
.tabs-header { display: flex; gap: 4px; border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.tab-button {
  padding: 10px 16px;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  color: var(--text-dim);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  position: relative;
  border-radius: 8px 8px 0 0;
}
.tab-button:hover:not(:disabled) { color: var(--text); background: var(--panel-2); }
.tab-button.active { color: var(--text); background: var(--panel-2); border-color: var(--border); }
.tab-button.active::after {
  content: '';
  position: absolute; bottom: -1px; left: 0; right: 0; height: 2px;
  background: var(--blue);
}
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.15s ease-in; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ---- settings cards -------------------------------------------------------- */
.settings-list { display: grid; grid-template-columns: 1fr; gap: 16px; align-items: start; }
@media (min-width: 900px) { .settings-list { grid-template-columns: 1fr 1fr; } }
.settings-col { display: flex; flex-direction: column; gap: 16px; }
.setting-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
.setting-card-header { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.setting-card-header h3 { margin: 0; font-size: 1rem; color: var(--text); }
.setting-card-icon { font-size: 1.2rem; line-height: 1; }
.setting-field { margin-bottom: 16px; }
.setting-field:last-child { margin-bottom: 0; }
.setting-label { display: flex; flex-direction: column; gap: 4px; text-transform: none; letter-spacing: normal; }
.setting-label-row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.setting-name { font-family: var(--mono); font-size: 0.85rem; font-weight: 600; color: var(--text); text-transform: none; letter-spacing: 0; }
.setting-range { font-family: var(--mono); font-size: 0.78rem; font-weight: 700; color: var(--blue-soft); }
.setting-desc { font-size: 0.8rem; color: var(--text-dim); line-height: 1.5; margin: 2px 0; }
.setting-input { width: 100%; }
.save-hint { font-size: 0.8rem; color: var(--text-dim); line-height: 1.5; margin: 4px 0 0 0; }

/* ---- LED timeout toggle ---------------------------------------------------- */
.led-timeout-toggle { display: flex; flex-direction: column; gap: 10px; }
.toggle-wrapper { display: flex; align-items: center; gap: 10px; }
.toggle-switch { position: relative; display: inline-block; width: 46px; height: 26px; flex: 0 0 auto; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background: var(--panel-2); border: 1px solid var(--border); transition: .2s; border-radius: 26px; }
.toggle-slider::before { position: absolute; content: ""; height: 18px; width: 18px; left: 3px; bottom: 3px; background: var(--text-dim); transition: .2s; border-radius: 50%; }
.toggle-switch input:checked + .toggle-slider { background: var(--blue); border-color: var(--blue); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); background: #06101f; }
.toggle-label-text { font-family: var(--mono); font-size: 0.78rem; color: var(--text-dim); }
.led-timeout-input-wrapper.hidden { display: none; }

/* ---- grips --------------------------------------------------------------- */
.grips-list { list-style: none; padding: 0; margin: 0; }
.grip-item {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px;
  margin-bottom: 8px; cursor: grab; background: var(--panel-2);
}
.grip-item:hover { border-color: var(--blue); }
.grip-item.dragging { opacity: 0.5; }
.grip-swatch { width: 28px; height: 20px; border-radius: 4px; border: 1px solid var(--border); flex: 0 0 auto; }
.grip-name { font-weight: 600; color: var(--text); flex: 1; }
.grip-brightness { font-family: var(--mono); color: var(--text-dim); font-size: 0.82rem; }

/* ---- file drop zone -------------------------------------------------------- */
.drop-zone {
  border: 2px dashed var(--border); border-radius: var(--radius);
  padding: 2rem; text-align: center; cursor: pointer;
  background: var(--panel-2); transition: background-color .15s, border-color .15s;
}
.drop-zone.drag-over { background: rgba(59,130,246,0.08); border-color: var(--blue); }
.file-status { margin-top: 1rem; padding: 0.75rem 1rem; border-radius: 8px; background: var(--panel-2); color: var(--text); }
.file-status.success { background: rgba(34,197,94,0.12); color: var(--green); }
.file-status.error { background: rgba(239,68,68,0.12); color: var(--red-soft); }

/* ---- fullscreen chart (мобільний перегляд, горизонтальна орієнтація) ----- */
#plotPanel:fullscreen {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  max-width: none;
  background: var(--bg);
  padding: 14px;
  overflow-y: auto;
}
#plotPanel:fullscreen #chartWrap {
  flex: 1 1 auto;
  min-height: 0;
  height: auto;
}

/* ---- mobile -------------------------------------------------------------- */
@media (max-width: 640px) {
  .topbar { padding: 10px 14px; }
  .page { padding: 14px; gap: 12px; }
  .brand { gap: 6px; }
  .brand .mark { font-size: 0.9rem; }
  .brand .page { display: none; }
  .btn-full-label { display: none; }
  button { padding: 9px 12px; font-size: 0.82rem; }
  .row { gap: 8px; }
  .num-narrow { width: 100%; }
  .field { flex: 1 1 130px; }
}