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

html, body { height: 100%; overflow: hidden; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top left, rgba(96,120,255,0.12), transparent 28%),
    radial-gradient(circle at bottom right, rgba(95,125,255,0.08), transparent 28%),
    #080a13;
  color: #e0e0e0;
  display: flex;
  align-items: stretch;
}

.container {
  display: grid;
  grid-template-columns: 300px 1fr;
  width: 100%;
  height: 100vh;
}

/* ---- Sidebar ---- */
.panel {
  background: rgba(12,16,34,0.98);
  border-right: 1px solid rgba(70,80,150,0.18);
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

.panel-header {
  padding: 24px 20px 18px;
  border-bottom: 1px solid rgba(71,88,197,0.2);
  background: linear-gradient(180deg, rgba(30,37,74,0.98), rgba(11,14,30,0.98));
  flex-shrink: 0;
}

.brand-title { display: flex; align-items: center; gap: 18px; }

.brand-logo {
  width: 96px; height: auto; min-width: 96px;
  border-radius: 18px; padding: 8px;
  filter: drop-shadow(0 0 18px rgba(95,125,255,0.35));
}

.brand-label {
  font-size: 10px; letter-spacing: 0.16em;
  text-transform: uppercase; color: #8ea0ff; margin-bottom: 4px;
}

.panel-header h1 {
  font-size: 22px; font-weight: 700; color: #fff; letter-spacing: -0.3px; margin: 0;
}

.tool-tagline { margin: 6px 0 0; font-size: 12px; color: #b5bfff; }

.panel-body {
  flex: 1; overflow-y: auto; padding: 16px 20px;
  display: flex; flex-direction: column; gap: 16px;
  scrollbar-width: thin; scrollbar-color: #2a2a2a transparent;
}
.panel-body::-webkit-scrollbar { width: 4px; }
.panel-body::-webkit-scrollbar-thumb { background: #2a2a2a; border-radius: 4px; }

.section-title {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.8px; color: #444; margin-bottom: 8px;
}

hr { border: none; border-top: 1px solid #1c1c1c; }

/* ---- Inputs ---- */
.input-row { display: flex; gap: 8px; }

input[type=text], input[type=datetime-local], select {
  background: #111420;
  border: 1px solid #1e2340;
  border-radius: 8px;
  color: #e0e0e0;
  font-size: 13px;
  font-family: 'Menlo','Monaco','Courier New',monospace;
  padding: 8px 10px;
  outline: none;
  transition: border-color .15s;
  width: 100%;
}
input[type=text]:focus,
input[type=datetime-local]:focus,
select:focus { border-color: #3a4070; }

input[type=datetime-local] { font-family: inherit; }

select option { background: #111420; }

.now-btn {
  background: rgba(95,125,255,0.1);
  border: 1px solid rgba(95,125,255,0.2);
  border-radius: 8px;
  color: #8ea0ff;
  font-size: 11px;
  font-weight: 600;
  padding: 0 12px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, color .15s;
  flex-shrink: 0;
}
.now-btn:hover { background: rgba(95,125,255,0.2); color: #fff; }

/* ---- Unit toggle ---- */
.unit-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: #0e1020;
  border: 1px solid #1e2340;
  border-radius: 9px;
  padding: 3px;
  gap: 3px;
}
.unit-btn {
  background: transparent; border: none;
  border-radius: 6px; color: #555;
  font-size: 11px; font-weight: 600;
  padding: 6px; cursor: pointer;
  transition: background .15s, color .15s;
}
.unit-btn.active { background: #5f7dff; color: #fff; }
.unit-btn:not(.active):hover { background: rgba(95,125,255,0.1); color: #8ea0ff; }

/* ---- Output side ---- */
.output-side { display: flex; flex-direction: column; height: 100vh; overflow: hidden; }

.output-topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px;
  border-bottom: 1px solid rgba(70,80,150,0.18);
  background: rgba(10,13,28,0.8);
  flex-shrink: 0; gap: 10px;
}

.status-badge {
  font-size: 11px; font-weight: 600; padding: 3px 10px; border-radius: 20px;
}
.status-badge.idle    { background: rgba(100,100,120,0.2); color: #555; border: 1px solid #222; }
.status-badge.ok      { background: rgba(0,200,120,0.12); color: #00c878; border: 1px solid rgba(0,200,120,0.25); }
.status-badge.invalid { background: rgba(255,80,80,0.12); color: #ff6060; border: 1px solid rgba(255,80,80,0.25); }

.relative-time { font-size: 12px; color: #444; font-family: monospace; }

/* ---- Output body ---- */
.output-body {
  flex: 1; overflow-y: auto; padding: 20px;
  display: flex; flex-direction: column; gap: 16px;
  scrollbar-width: thin; scrollbar-color: #1e1e1e transparent;
}
.output-body::-webkit-scrollbar { width: 6px; }
.output-body::-webkit-scrollbar-thumb { background: #1e1e1e; border-radius: 4px; }

/* ---- Now card ---- */
.now-card {
  background: rgba(15,20,25,0.6);
  border: 1.5px solid #1a1f30;
  border-radius: 10px;
  padding: 16px 20px;
  display: flex; flex-direction: column; gap: 4px;
}

.now-label {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.8px; color: #333; margin-bottom: 4px;
}

.now-unix {
  font-family: 'Menlo','Monaco','Courier New',monospace;
  font-size: 22px; font-weight: 700;
  color: #8ea0ff; letter-spacing: -0.5px;
}

.now-human {
  font-size: 13px; color: #555; font-family: monospace;
}

/* ---- Results grid ---- */
.results-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.result-empty {
  grid-column: 1 / -1;
  font-size: 13px; color: #2a2a3a;
  padding: 20px 0;
}

/* ---- Result card ---- */
.result-card {
  background: rgba(15,20,25,0.6);
  border: 1.5px solid #1a1f30;
  border-radius: 10px;
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
  position: relative;
  overflow: hidden;
}
.result-card:hover {
  border-color: rgba(95,125,255,0.4);
  background: rgba(15,20,25,0.9);
}
.result-card.wide { grid-column: 1 / -1; }

.result-label {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.8px; color: #333; margin-bottom: 6px;
}

.result-value {
  font-family: 'Menlo','Monaco','Courier New',monospace;
  font-size: 13px; color: #c0cce0;
  word-break: break-all; line-height: 1.5;
}

.result-value.accent { color: #8ea0ff; font-size: 15px; font-weight: 600; }

.copy-hint {
  position: absolute; bottom: 8px; right: 10px;
  font-size: 10px; color: #222;
  transition: color .15s;
}
.result-card:hover .copy-hint { color: #444; }
.result-card.copied { border-color: rgba(0,200,120,0.4); }
.result-card.copied .copy-hint { color: #00c878; }

/* ---- Mobile ---- */
@media (max-width: 700px) {
  html, body { overflow: auto; height: auto; }
  .container { grid-template-columns: 1fr; height: auto; min-height: 100vh; }
  .panel { height: auto; overflow: visible; border-right: none; border-bottom: 1px solid rgba(70,80,150,0.18); }
  .panel-body { overflow: visible; }
  .output-side { height: auto; }
  .results-grid { grid-template-columns: 1fr; }
  .result-card.wide { grid-column: 1; }
}