@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;700&family=JetBrains+Mono:wght@400;600&display=swap");

:root {
  --ink: #14211d;
  --muted: #41564f;
  --paper: #efe5cf;
  --panel: #fbf6e7;
  --accent: #d25d2e;
  --accent-dark: #8a3412;
  --lime: #2f7d58;
  --lime-dark: #1d4f37;
  --bad: #b23830;
  --grid: #d7c7a8;
  --wall: #1d1712;
  --trail: rgba(47, 125, 88, 0.22);
  --start: #f0bb49;
  --cell-size: 40px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.62), rgba(255, 255, 255, 0)),
    radial-gradient(circle at 12% 6%, rgba(210, 93, 46, 0.12), transparent 34%),
    radial-gradient(circle at 88% 10%, rgba(47, 125, 88, 0.14), transparent 32%),
    var(--paper);
  padding: 20px;
}

.shell {
  width: min(1240px, 100%);
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 2px 4px 0;
}

.brand-icon {
  width: 32px;
  height: 32px;
  display: block;
  border-radius: 8px;
  border: 1px solid rgba(20, 33, 29, 0.35);
  box-shadow: 0 2px 8px rgba(20, 33, 29, 0.18);
  background: rgba(255, 255, 255, 0.85);
}

.brand-name {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.1;
}

.main-row {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 410px);
  gap: 22px;
  align-items: start;
}

.panel {
  background: var(--panel);
  border: 2px solid var(--ink);
  border-radius: 16px;
  box-shadow: 0 10px 20px rgba(20, 33, 29, 0.08);
  padding: 16px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.program-panel {
  padding: 10px 12px;
  gap: 8px;
}

.block {
  border: 1px solid rgba(20, 33, 29, 0.25);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.62);
  padding: 12px;
  display: grid;
  gap: 10px;
}

.block h2 {
  margin: 0;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.program-block {
  padding: 9px 10px;
  gap: 7px;
}

.program-block h2 {
  font-size: 11px;
  letter-spacing: 0.14em;
}

.program-line-top {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.program-line-bottom {
  display: grid;
  grid-template-columns: minmax(280px, 420px) minmax(220px, 270px) minmax(120px, 1fr) minmax(250px, 320px);
  gap: 8px;
  align-items: center;
}

.control {
  display: grid;
  gap: 6px;
}

.control label {
  font-size: 12px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pair {
  display: grid;
  grid-template-columns: 1fr 80px;
  gap: 8px;
  align-items: center;
}

input[type="range"] {
  width: 100%;
}

input[type="number"],
select {
  width: 100%;
  border: 1px solid rgba(20, 33, 29, 0.4);
  border-radius: 8px;
  padding: 7px 8px;
  font-size: 14px;
  font-family: "JetBrains Mono", monospace;
  background: #fff;
}

button {
  border: 1px solid var(--ink);
  border-radius: 10px;
  padding: 8px 10px;
  cursor: pointer;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  transition: transform 0.12s ease;
}

button:active {
  transform: translateY(1px);
}

button.secondary {
  color: var(--ink);
  background: #fff;
}

.turn-btn {
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.button-row.triple {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.button-row.six {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.button-row.five {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.program-buttons {
  gap: 6px;
  min-width: 0;
}

.program-buttons button {
  min-height: 36px;
  padding: 5px 8px;
}

.program-strip {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  gap: 0;
  border: 1px solid rgba(20, 33, 29, 0.24);
  border-radius: 4px;
  background: #fff;
  padding: 4px;
  min-height: 40px;
  overflow-x: auto;
  overflow-y: hidden;
}

.token-empty {
  font-size: 12px;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
}

.program-token {
  border: 1px solid rgba(20, 33, 29, 0.3);
  border-radius: 0;
  background: #fff;
  color: var(--ink);
  font-family: "JetBrains Mono", monospace;
  font-size: 26px;
  font-weight: 700;
  width: 44px;
  min-width: 44px;
  height: 38px;
  padding: 0;
  line-height: 0.9;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.program-slot {
  width: 44px;
  min-width: 44px;
  height: 38px;
  min-height: 38px;
  border: 1px solid rgba(20, 33, 29, 0.22);
  border-radius: 0;
  background: rgba(20, 33, 29, 0.04);
  position: relative;
  flex: 0 0 auto;
}

.program-strip > .program-token,
.program-strip > .program-slot {
  margin-left: -1px;
}

.program-strip > :first-child {
  margin-left: 0;
}

.program-slot::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(20, 33, 29, 0.2);
  transform: translate(-50%, -50%);
}

.program-limit-tag {
  border: 1px dashed rgba(20, 33, 29, 0.34);
  border-radius: 4px;
  padding: 0 8px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  background: rgba(20, 33, 29, 0.04);
  flex: 0 0 auto;
  margin-left: 8px;
}

.program-token[data-op="F"],
.program-token[data-op="L"],
.program-token[data-op="R"],
.program-token[data-op="S"] {
  font-size: 26px;
}

.program-token[data-op="J"] {
  flex-direction: column;
  gap: 0;
}

.program-token .jump-op {
  font-size: 18px;
  font-weight: 700;
  line-height: 0.9;
}

.program-token .jump-arg {
  font-size: 14px;
  font-weight: 600;
  line-height: 0.9;
  color: var(--muted);
}

.program-token.active {
  border-color: var(--lime);
  box-shadow: inset 0 0 0 1px rgba(47, 125, 88, 0.45);
}

.program-token.selected {
  border-color: var(--accent-dark);
  background: rgba(210, 93, 46, 0.12);
}

.program-token.jump-target {
  border-color: #2f5ea8;
  background: rgba(47, 94, 168, 0.18);
}

.program-edit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 72px;
  gap: 6px;
  align-items: center;
  min-width: 0;
}

.selected-info {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--muted);
}

.summary {
  border: 1px solid rgba(20, 33, 29, 0.22);
  border-radius: 8px;
  padding: 8px;
  font-size: 12px;
  line-height: 1.4;
  font-family: "JetBrains Mono", monospace;
  background: rgba(255, 255, 255, 0.6);
}

.program-summary {
  border: none;
  background: transparent;
  padding: 1px 2px;
  border-radius: 0;
  font-size: 11px;
  line-height: 1.2;
  color: var(--muted);
}

.program-actions {
  min-width: 0;
}

.status {
  border: 1px solid var(--ink);
  border-radius: 10px;
  padding: 9px 10px;
  font-size: 14px;
  background: #fff;
}

.status.ok {
  border-color: var(--lime);
  color: var(--lime-dark);
}

.status.bad {
  border-color: var(--bad);
  color: var(--bad);
}

.meta {
  font-size: 13px;
  line-height: 1.45;
  display: grid;
  gap: 3px;
}

.meta strong {
  font-weight: 700;
}

.arena {
  background: var(--panel);
  border: 2px solid var(--ink);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 12px 24px rgba(20, 33, 29, 0.1);
  display: grid;
  gap: 12px;
  transition: background 0.25s ease;
}

.arena.solved {
  background:
    linear-gradient(180deg, rgba(117, 217, 140, 0.28), rgba(117, 217, 140, 0.16)),
    var(--panel);
}

.arena.crashed {
  background:
    linear-gradient(180deg, rgba(226, 89, 80, 0.28), rgba(226, 89, 80, 0.16)),
    var(--panel);
}

.board-wrap {
  position: relative;
  border: 2px solid rgba(20, 33, 29, 0.8);
  border-radius: 14px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0)),
    #fffdf5;
  padding: 14px;
  min-height: 560px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow: auto;
}

.exec-countdown {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  border: 1px solid rgba(20, 33, 29, 0.35);
  border-radius: 999px;
  padding: 4px 10px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.exec-countdown.warn {
  border-color: var(--accent-dark);
  color: var(--accent-dark);
}

.exec-countdown.low {
  border-color: var(--bad);
  color: var(--bad);
}

.board {
  display: grid;
  gap: 2px;
  background: var(--grid);
  border-radius: 10px;
  padding: 2px;
}

.cell {
  width: var(--cell-size);
  height: var(--cell-size);
  border-radius: 4px;
  background: #fff9eb;
  position: relative;
}

.cell.blocked {
  background: var(--wall);
}

.cell.start::before {
  content: "";
  position: absolute;
  inset: 16%;
  border: 2px dashed rgba(20, 33, 29, 0.45);
  border-radius: 50%;
  background: rgba(240, 187, 73, 0.55);
}

.cell.trail::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--trail);
}

.cell.robot::after {
  content: "";
  position: absolute;
  inset: 8%;
  background: center / contain no-repeat url("./assets/robot.svg");
  transform: rotate(var(--arrow-rot));
  transform-origin: center;
  pointer-events: none;
}

.cell.dir-n {
  --arrow-rot: 0deg;
}

.cell.dir-e {
  --arrow-rot: 90deg;
}

.cell.dir-s {
  --arrow-rot: 180deg;
}

.cell.dir-w {
  --arrow-rot: 270deg;
}

@media (max-width: 980px) {
  .main-row {
    grid-template-columns: 1fr;
  }

  .program-line-top {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .program-line-bottom {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .program-summary {
    grid-column: 1 / -1;
  }

  .button-row.six {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .button-row.five {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .board-wrap {
    min-height: 420px;
  }
}

@media (max-width: 640px) {
  .brand-name {
    font-size: 18px;
  }

  .program-line-bottom {
    grid-template-columns: 1fr;
  }

  .program-edit {
    grid-template-columns: minmax(0, 1fr);
  }
}