:root {
  /* Premium Dark Theme Palette */
  --bg-gradient-start: #0f172a;
  --bg-gradient-end: #1e293b;
  --glass-bg: rgba(30, 41, 59, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-glow: 0 0 15px rgba(59, 130, 246, 0.5);
  --input-bg: rgba(15, 23, 42, 0.6);
  --input-border: rgba(148, 163, 184, 0.2);
  --input-focus: rgba(59, 130, 246, 0.8);
  --pos: #10b981;
  --neg: #ef4444;
  --group-bg: rgba(255, 255, 255, 0.03);
  --group-border: rgba(255, 255, 255, 0.08);
}

* { 
  box-sizing: border-box; 
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, var(--bg-gradient-start) 0%, var(--bg-gradient-end) 100%);
  color: var(--text-main);
  font-size: 14px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Glassmorphism Utilities */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: 16px;
}

/* Header */
.glass-header {
  display: flex;
  align-items: center;
  padding: 16px 32px;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 10;
}

.header-content {
  display: flex;
  align-items: center;
  gap: 16px;
}

.logo {
  font-size: 28px;
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 0 8px rgba(59,130,246,0.6));
}

header h1 { 
  margin: 0; 
  font-family: "Outfit", sans-serif;
  font-size: 24px; 
  font-weight: 700;
  letter-spacing: -0.02em;
}

header .sub { 
  margin: 2px 0 0; 
  color: var(--text-muted); 
  font-size: 13px; 
  font-weight: 500;
}

/* Layout */
main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  padding: 24px 32px;
  align-items: start;
  flex: 1;
}

.left, .right {
  padding: 24px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.right {
  background: rgba(30, 41, 59, 0.4);
}

/* Form Layout Grids */
.grid-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

/* Fieldsets / Grouping */
.group-box {
  border: 1px solid var(--group-border);
  border-radius: 12px;
  padding: 20px 16px 4px 16px; /* 4px bottom to account for grid-bottom-margin */
  margin-bottom: 24px;
  background: var(--group-bg);
  transition: all 0.3s ease;
}
.group-box:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
}

.group-box legend {
  padding: 0 10px;
  font-family: "Outfit", sans-serif;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Form Controls */
.frow { 
  display: flex; 
  flex-direction: column; 
  gap: 6px; 
}

.frow label { 
  font-size: 12px; 
  color: var(--text-muted); 
  font-weight: 600; 
  letter-spacing: 0.02em;
}

.premium-input, .premium-select {
  width: 100%;
  min-width: 0;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  font-family: "Inter", sans-serif;
  font-size: 14px;
  color: var(--text-main);
  transition: all 0.2s ease;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.premium-input:hover, .premium-select:hover {
  border-color: rgba(148, 163, 184, 0.4);
}

.premium-input:focus, .premium-select:focus { 
  outline: none; 
  border-color: var(--accent); 
  box-shadow: var(--accent-glow); 
  background: rgba(15, 23, 42, 0.9);
}

/* Select specific styling */
.premium-select option, .premium-select optgroup {
  background: #1e293b;
  color: #f8fafc;
}
.premium-select optgroup {
  font-weight: 700;
  color: var(--accent);
}

/* Checkboxes */
.frow.chk { 
  flex-direction: row; 
  align-items: center; 
  justify-content: flex-start;
  margin-bottom: 0;
  height: 100%;
}

.premium-check {
  display: inline-flex; 
  align-items: center; 
  gap: 8px; 
  cursor: pointer;
}

.premium-check input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 6px;
  display: grid;
  place-content: center;
  transition: all 0.2s ease;
  cursor: pointer;
}

.premium-check input[type="checkbox"]::before {
  content: "";
  width: 10px;
  height: 10px;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--accent);
  transform-origin: center;
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}

.premium-check input[type="checkbox"]:checked {
  background: rgba(59, 130, 246, 0.2);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(59, 130, 246, 0.3);
}

.premium-check input[type="checkbox"]:checked::before {
  transform: scale(1);
}

.premium-check .chk-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-main);
  user-select: none;
}
.premium-check:hover input[type="checkbox"] {
  border-color: var(--accent-hover);
}

.frow.hide { display: none; }

/* Results Panel */
#results { 
  min-width: 0; 
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  align-items: start;
}

.rhead { 
  font-family: "Outfit", sans-serif;
  font-size: 20px; 
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid var(--glass-border);
  padding-bottom: 12px;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
}
.rhead b {
  color: var(--accent-hover);
  margin-left: 8px;
}

.rhead .split { 
  margin-left: 14px; 
  background: rgba(245, 158, 11, 0.2); 
  color: #fcd34d; 
  font-size: 12px; 
  padding: 4px 10px; 
  border-radius: 999px; 
  font-weight: 600; 
  font-family: "Inter", sans-serif;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.subp { 
  font-size: 13px; 
  color: var(--text-muted); 
  background: rgba(0,0,0,0.2);
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px dashed rgba(255,255,255,0.1);
}

.grp { 
  border: 1px solid var(--glass-border); 
  border-radius: 12px; 
  overflow: hidden; 
  background: rgba(15, 23, 42, 0.4);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.grp:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
  border-color: rgba(255,255,255,0.15);
}

.gtitle { 
  background: rgba(255,255,255,0.03); 
  padding: 8px 12px; 
  font-size: 11px; 
  font-weight: 700; 
  color: var(--text-muted); 
  border-bottom: 1px solid var(--glass-border); 
  text-transform: uppercase; 
  letter-spacing: .06em; 
}

.grow { 
  display: flex; 
  justify-content: space-between; 
  align-items: center;
  padding: 6px 12px; 
  border-bottom: 1px solid rgba(255,255,255,0.05); 
  transition: background 0.2s ease;
}

.grow:hover {
  background: rgba(255,255,255,0.02);
}

.grow:last-child { border-bottom: none; }
.grow > span:first-child { color: var(--text-main); font-weight: 500; font-size: 12px;}

.grow .val { 
  font-variant-numeric: tabular-nums; 
  font-family: "Outfit", sans-serif;
  font-weight: 700; 
  font-size: 13px;
  color: var(--text-main); 
  text-shadow: 0 0 10px rgba(255,255,255,0.1);
}

/* Colorize specific values based on content */
.grow .val:contains("-") {
  color: var(--pos) !important;
}

.grow:last-child .val {
  color: var(--accent-hover);
}

.grow .miss { 
  color: var(--neg); 
  font-weight: 400; 
  font-size: 12px; 
  font-family: "Inter", sans-serif;
}

.err { 
  color: #fca5a5; 
  background: rgba(153, 27, 27, 0.4); 
  border: 1px solid #dc2626; 
  padding: 12px 16px; 
  border-radius: 12px; 
  font-size: 14px; 
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Custom Scrollbar for sleek look */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(0,0,0,0.1); 
  border-radius: 4px;
}
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.2); 
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255,255,255,0.3); 
}

/* Responsive */
@media (max-width: 1280px) {
  .results-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1024px) {
  main { 
    grid-template-columns: 1fr; 
  }
}

@media (max-width: 768px) {
  .results-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}