* {
  box-sizing: border-box;
}

:root {
  --bg: #1d232c;
  --panel-bg: #10131a;
  --panel-border: #666c78;
  --text-main: #e8edf5;
  --text-muted: #a8b0c0;
  --control-bg: #1f2430;
  --control-border: #565d6a;
  --accent: #2b79ff;
}

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: radial-gradient(circle at top, #232a35 0%, var(--bg) 55%);
  color: var(--text-main);
}

.page {
  max-width: 980px;
  margin: 24px auto;
  padding: 0 16px 24px;
}

h1 {
  text-align: center;
  margin-bottom: 24px;
  font-size: 46px;
  font-weight: 700;
  color: #f2f6fb;
}

.layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 18px;
}

.panel {
  background: var(--panel-bg);
  border: 2px solid var(--panel-border);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
  padding: 16px;
}

.left-panel h2,
.left-panel h3 {
  margin-top: 0;
  color: #f0f4fa;
}

.stars {
  font-size: 28px;
  letter-spacing: 3px;
  margin-bottom: 16px;
  color: #d9dee8;
}

.substats-list {
  padding-left: 18px;
  margin: 0;
  min-height: 120px;
  color: #d5dbe7;
}

.right-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stat-row label {
  display: block;
  font-weight: 700;
  margin-bottom: 6px;
  color: #e7edf8;
}

.main-stat-row {
  border: 1px dashed #495161;
  border-radius: 6px;
  padding: 10px;
}

.stat-row-head {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.stat-row-head label {
  margin-bottom: 0;
}

.substat-type {
  min-width: 210px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.value-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.slider-stepper {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.slider-stepper-btn {
  width: 24px;
  height: 20px;
  border: 1px solid var(--control-border);
  border-radius: 4px;
  background: var(--control-bg);
  color: #e6ebf5;
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

.slider-stepper-btn:hover {
  border-color: #8b94a8;
  background: #283042;
}

.slider-stepper-btn:active {
  transform: translateY(1px);
}

.value-controls input[type="range"] {
  flex: 1;
}

.slider-wrap {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
}

.slider-ticks {
  position: absolute;
  left: 8px;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  height: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
  z-index: 1;
}

.slider-tick {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #7f8797;
}

.slider-tick.is-active {
  background: var(--accent);
}

.value-input {
  width: 92px;
  padding: 6px;
}

input[type="number"],
select {
  border: 1px solid var(--control-border);
  border-radius: 4px;
  background: var(--control-bg);
  color: var(--text-main);
}

input[type="number"] {
  outline: none;
}

input[type="number"]:focus,
select:focus {
  border-color: #8ca2d9;
  box-shadow: 0 0 0 2px rgba(67, 135, 255, 0.28);
  outline: none;
}

.roll-info {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.roll-badge {
  background: #586171;
  color: #f5f8fc;
  border-radius: 4px;
  padding: 2px 8px;
  font-weight: 700;
  font-size: 14px;
}

.roll-values {
  font-size: 22px;
  line-height: 1;
  color: #aeb7c8;
}

.roll-badge.roll-tier-1 { background: #6f6f6f; color: #fff; }
.roll-badge.roll-tier-2 { background: #64845b; color: #fff; }
.roll-badge.roll-tier-3 { background: #3f9e3f; color: #fff; }
.roll-badge.roll-tier-4 { background: #00c853; color: #fff; }
.roll-badge.roll-tier-5 { background: #19b9b9; color: #fff; }
.roll-badge.roll-tier-6 { background: #7b2cbf; color: #fff; }

.roll-value-roll-3 {
  color: #3f9e3f;
}

.roll-value-roll-4 {
  color: #00c853;
}

.roll-value-roll-5 {
  color: #19b9b9;
}

.roll-value-roll-6 {
  color: #7b2cbf;
}

.roll-value-min {
  color: #3f9e3f;
}

.roll-value-medium {
  color: #00c853;
}

.roll-value-high {
  color: #19b9b9;
}

.roll-value-max {
  color: #7b2cbf;
}

.roll-error {
  min-height: 22px;
  margin: 0 auto 10px;
  max-width: 640px;
  color: #ff6f8d;
  font-weight: 700;
  text-align: center;
}

.extra-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

select {
  min-width: 180px;
  padding: 6px;
}

.toggle-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  margin-top: 8px;
}

.stat-row.is-disabled {
  opacity: 0.55;
}

.calc-btn {
  display: block;
  margin: 16px auto;
  padding: 10px 28px;
  font-size: 18px;
  font-weight: 700;
  color: #f8fbff;
  -webkit-text-fill-color: #f8fbff;
  opacity: 1;
  border: 2px solid #6d7584;
  background: #181d26;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.calc-btn:hover {
  background: #202736;
  border-color: #8b94a8;
}

.result-panel h2 {
  margin-top: 0;
}

#resultText {
  margin-bottom: 0;
  font-size: 17px;
}

@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
  }
}