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

:root {
  --bg: #0d1117;
  --surface: #161b22;
  --surface2: #1c2128;
  --border: #30363d;
  --border2: #3d444d;
  --ink: #e6edf3;
  --ink2: #8b949e;
  --ink3: #484f58;
  --accent: #58a6ff;
  --accent2: #bc8cff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --tag-bg: #1c2128;
}

body {
  font-family: 'IBM Plex Sans', sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}


header {
  z-index: 2;
  padding: 18px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.brand-title {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.5px;
}


.brand-title .arrow {
  color: var(--accent);
  font-family: 'IBM Plex Mono', monospace;
}

.brand-sub {
  font-size: 11px;
  color: var(--ink3);
  font-family: 'IBM Plex Mono', monospace;
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 20px;
  background: var(--tag-bg);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}


.btn {
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 13px;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 6px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.14s;
}

.btn-outline {
  background: transparent;
  border-color: var(--border2);
  color: var(--ink2);
}

.btn-outline:hover {
  background: var(--surface2);
  border-color: var(--ink3);
  color: var(--ink);
}

.btn-solid {
  background: var(--surface2);
  color: var(--ink2);
  border-color: var(--border2);
}

.btn-solid:hover {
  background: var(--border);
  color: var(--ink);
}

.btn-accent {
  background: var(--accent);
  color: #0d1117;
  border-color: var(--accent);
  font-weight: 700;
}

.btn-accent:hover {
  background: #79b8ff;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(88, 166, 255, 0.3);
}


main {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  min-height: calc(100vh - 118px);
}

.panel-left,
.panel-right {
  display: flex;
  flex-direction: column;
}

.panel-head {
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--ink3);
  transition: color 0.2s;
}


.status-pill {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  padding: 2px 10px;
  border-radius: 20px;
  border: 1px solid;
  transition: all 0.2s;
}

.pill-neutral {
  background: var(--tag-bg);
  border-color: var(--border2);
  color: var(--ink3);
}

.pill-ok {
  background: rgba(63, 185, 80, 0.1);
  border-color: rgba(63, 185, 80, 0.4);
  color: var(--green);
}

.pill-err {
  background: rgba(248, 81, 73, 0.1);
  border-color: rgba(248, 81, 73, 0.4);
  color: var(--red);
}

.pill-warn {
  background: rgba(210, 153, 34, 0.1);
  border-color: rgba(210, 153, 34, 0.4);
  color: var(--yellow);
}


textarea {
  flex: 1;
  background: var(--bg);
  border: none;
  outline: none;
  resize: none;
  padding: 24px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink);
  caret-color: var(--accent);
  tab-size: 2;
}

textarea::placeholder {
  color: var(--ink3);
  font-style: italic;
}

.output-area {
  flex: 1;
  background: var(--bg);
  padding: 24px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink);
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}


.tok-key {
  color: #79c0ff;
  font-weight: 500;
}

.tok-str {
  color: #a5d6ff;
}

.tok-num {
  color: #ffa657;
}

.tok-bool {
  color: var(--accent2);
}

.tok-null {
  color: var(--ink3);
  font-style: italic;
}

.tok-kw {
  color: var(--accent2);
}


.divider-col {
  background: var(--border);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.swap-btn {
  position: absolute;
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--ink2);
  font-size: 18px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  z-index: 2;
  cursor: pointer;
  -webkit-user-select: none;
  user-select: none;
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
      background 0.15s,
      color 0.15s,
      box-shadow 0.15s,
      transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.swap-btn:hover {
  background: var(--accent);
  color: #0d1117;
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.4);
}

.swap-btn.flipped {
  transform: rotate(180deg);
}


.fixes-bar {
  padding: 9px 24px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  min-height: 40px;
  align-items: center;
}

.fixes-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--ink3);
  margin-right: 4px;
}

.empty-text {
  font-size: 12px;
  color: var(--ink3);
  font-family: 'IBM Plex Mono', monospace;
}

.fix-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid;
  font-weight: 500;
  animation: popIn 0.15s ease;
}

@keyframes popIn {
  from {
      transform: scale(0.8);
      opacity: 0;
  }
  to {
      transform: scale(1);
      opacity: 1;
  }
}

.fix-ok {
  background: rgba(63, 185, 80, 0.1);
  border-color: rgba(63, 185, 80, 0.35);
  color: var(--green);
}

.fix-warn {
  background: rgba(210, 153, 34, 0.1);
  border-color: rgba(210, 153, 34, 0.35);
  color: var(--yellow);
}

.fix-err {
  background: rgba(248, 81, 73, 0.1);
  border-color: rgba(248, 81, 73, 0.35);
  color: var(--red);
}

.fix-info {
  background: rgba(88, 166, 255, 0.1);
  border-color: rgba(88, 166, 255, 0.35);
  color: var(--accent);
}


.err-block {
  background: rgba(248, 81, 73, 0.07);
  border: 1px solid rgba(248, 81, 73, 0.3);
  border-radius: 8px;
  padding: 16px 18px;
}

.err-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--red);
  margin-bottom: 8px;
}

.err-msg {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--ink2);
  line-height: 1.7;
}


.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  gap: 10px;
  text-align: center;
}

.empty-sym {
  font-size: 32px;
  opacity: 0.1;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ink);
}

.empty-txt {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink3);
}

.empty-hint {
  font-size: 11px;
  font-family: 'IBM Plex Mono', monospace;
  color: var(--ink3);
  opacity: 0.5;
}


.bottom-bar {
  padding: 10px 36px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ink3);
  font-family: 'IBM Plex Mono', monospace;
}

.bottom-actions {
  display: flex;
  gap: 8px;
}


.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--surface2);
  border: 1px solid var(--border2);
  color: var(--ink);
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  z-index: 100;
  opacity: 0;
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}