:root {
  --bg: #0d0d0b;
  --chrome: #131311;
  --panel: #0f0f0d;
  --border: #252520;
  --border-hi: #35352e;
  --txt: #ddddd5;
  --txt2: #7a7a6e;
  --txt3: #3d3d36;
  --lime: #c9f23a;
  --lime-dim: #6a7e1d;
  --amber: #f0a832;
  --red: #f04848;
  --sky: #56b8e8;
  --pur: #9f68f2;
  --teal: #4ec9b0;
  --sand: #c6a26e;
  --sage: #b5cea8;
  --mono: "Martian Mono", monospace;
  --serif: "Fraunces", serif;
}

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

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

body {
  background: var(--bg);
  color: var(--txt);
  font-family: var(--mono);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

header {
  height: 44px;
  background: var(--chrome);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 0;
  flex-shrink: 0;
}

.logo {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  font-style: italic;
  color: var(--txt);
  margin-right: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.logo-gem {
  width: 10px;
  height: 10px;
  background: var(--lime);
  transform: rotate(45deg);
  flex-shrink: 0;
}

.logo-word {
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  letter-spacing: -0.08em;
}

.logo-word span {
  color: var(--lime);
  font-style: normal;
}

.hsep {
  width: 1px;
  height: 22px;
  background: var(--border);
  margin: 0 14px;
}

.ftab {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  height: 44px;
  font-size: 0.68rem;
  color: var(--txt2);
  border: 0;
  border-right: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  transition: color 0.15s;
  position: relative;
  font-family: var(--mono);
}

.ftab.active {
  color: var(--txt);
  background: var(--panel);
}

.ftab.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--lime);
}

.ftab:hover:not(.active) {
  color: var(--txt);
}

.fdot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  opacity: 0.7;
}

.hspace {
  flex: 1;
}

.hactions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ddwrap {
  position: relative;
}

.btn-ex,
.btn-share {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--txt2);
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-ex:hover,
.btn-share:hover {
  border-color: var(--border-hi);
  color: var(--txt);
}

.btn-ex svg {
  transition: transform 0.2s;
}

.btn-ex.open svg {
  transform: rotate(180deg);
}

.ddmenu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--chrome);
  border: 1px solid var(--border-hi);
  min-width: 220px;
  z-index: 200;
  display: none;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
}

.ddmenu.open {
  display: block;
  animation: fade-dropdown 0.15s ease;
}

@keyframes fade-dropdown {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.ddi {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  font-size: 0.68rem;
  color: var(--txt2);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
  transition: background 0.1s, color 0.1s;
}

.ddi:last-child {
  border-bottom: none;
}

.ddi:hover {
  background: var(--panel);
  color: var(--txt);
}

.ddi.active {
  color: var(--lime);
}

.ddi-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.ddi-name {
  flex: 1;
  font-weight: 500;
}

.ddi-tag {
  font-size: 0.58rem;
  color: var(--txt3);
  border: 1px solid var(--border);
  padding: 1px 6px;
}

.workspace {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.divider {
  width: 5px;
  background: var(--border);
  cursor: col-resize;
  flex-shrink: 0;
  position: relative;
  transition: background 0.15s;
}

.divider:hover,
.divider.dragging {
  background: var(--lime);
}

.divider::before {
  content: "⋮";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 0.7rem;
  color: var(--txt3);
  pointer-events: none;
}

.ed-panel,
.term-panel {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 200px;
}

.ed-panel {
  background: var(--panel);
}

.term-panel {
  background: #090908;
  flex: 1;
}

.ph,
.term-ph {
  height: 30px;
  background: var(--chrome);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 8px;
  flex-shrink: 0;
}

.ph-label {
  font-size: 0.58rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--txt3);
}

.ph-lang {
  margin-left: auto;
  font-size: 0.58rem;
  color: var(--txt3);
  border: 1px solid var(--border);
  padding: 1px 7px;
}

.ed-scroll {
  flex: 1;
  overflow: auto;
  display: flex;
  min-height: 0;
}

.lnums {
  width: 48px;
  padding: 16px 0;
  text-align: right;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--chrome);
  user-select: none;
}

.lnum {
  font-size: 0.65rem;
  line-height: 1.65rem;
  padding-right: 12px;
  color: var(--txt3);
}

.lnum.hl {
  color: var(--txt2);
}

.code-area {
  flex: 1;
  padding: 16px 20px 16px 16px;
  outline: none;
  font-size: 0.75rem;
  line-height: 1.65rem;
  white-space: pre;
  overflow-wrap: normal;
  caret-color: var(--lime);
  color: var(--txt);
  tab-size: 2;
  min-height: 100%;
  font-family: var(--mono);
}

.code-area::selection,
.code-area *::selection {
  background: rgba(201, 242, 58, 0.13);
}

.code-area .line-error {
  text-decoration: underline wavy var(--red);
  text-decoration-thickness: 1.4px;
  text-underline-offset: 2px;
}

.tk-kw {
  color: var(--pur);
  font-weight: 600;
}

.tk-kw2 {
  color: var(--sky);
}

.tk-bi {
  color: var(--amber);
}

.tk-ty {
  color: var(--teal);
}

.tk-str {
  color: var(--sand);
}

.tk-num {
  color: var(--sage);
}

.tk-cmt {
  color: #444438;
  font-style: italic;
}

.tk-attr {
  color: var(--lime);
}

.tk-fn {
  color: #dcdcaa;
}

.tk-goal {
  color: #e06060;
}

.tk-op {
  color: var(--txt2);
}

.term-ph {
  gap: 10px;
}

.tstat {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.tdot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--txt3);
}

.tdot.running {
  background: var(--amber);
  animation: blink 0.8s step-end infinite;
}

.tdot.ok {
  background: var(--lime);
  box-shadow: 0 0 6px var(--lime-dim);
}

.tdot.err {
  background: var(--red);
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.tstat-txt {
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  color: var(--txt3);
  text-transform: uppercase;
}

.term-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 16px;
  font-size: 0.72rem;
  line-height: 1.7;
}

.tline {
  display: flex;
  gap: 0;
  animation: line-in 0.12s ease forwards;
  opacity: 0;
}

@keyframes line-in {
  from {
    opacity: 0;
    transform: translateX(-4px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.t-dim {
  color: var(--txt3);
}

.t-out {
  color: var(--txt);
}

.t-ok {
  color: var(--lime);
}

.t-err {
  color: var(--red);
}

.t-warn {
  color: var(--amber);
}

.t-info {
  color: var(--sky);
}

.t-val {
  color: var(--sand);
}

.tcursor {
  display: inline-block;
  width: 8px;
  height: 0.85em;
  background: var(--lime);
  vertical-align: text-bottom;
  animation: cursor-blink 1.1s step-end infinite;
  margin-left: 2px;
}

@keyframes cursor-blink {
  50% {
    opacity: 0;
  }
}

.toolbar {
  height: 38px;
  background: var(--chrome);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 8px;
  flex-shrink: 0;
}

.btn-run {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--lime);
  color: #0a0a08;
  border: none;
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 6px 16px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn-run:hover {
  background: #d4f75a;
}

.btn-run:active {
  transform: scale(0.97);
}

.btn-run.running {
  background: var(--amber);
  pointer-events: none;
}

.btn-sub {
  font-size: 0.55rem;
  opacity: 0.6;
}

.btn-fmt {
  display: flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--txt2);
  font-family: var(--mono);
  font-size: 0.63rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 5px 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-fmt:hover {
  border-color: var(--border-hi);
  color: var(--txt);
}

.tbsep {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 6px;
}

.tbstat {
  font-size: 0.63rem;
  color: var(--txt3);
  letter-spacing: 0.04em;
}

.tbstat.ok {
  color: var(--lime);
}

.tbstat.err {
  color: var(--red);
}

.tbspace {
  flex: 1;
}

.tbright {
  display: flex;
  align-items: center;
  gap: 14px;
}

.kbhint {
  font-size: 0.58rem;
  color: var(--txt3);
  display: flex;
  align-items: center;
  gap: 5px;
}

.kbd {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 1px 5px;
  font-size: 0.58rem;
  color: var(--txt2);
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  padding: 10px 12px;
  border: 1px solid var(--border-hi);
  background: var(--chrome);
  color: var(--txt);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity 0.16s ease, transform 0.16s ease;
  z-index: 10000;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--border-hi);
}

@media (max-width: 768px) {
  html,
  body {
    overflow: auto;
  }

  body {
    min-height: 100%;
  }

  header {
    padding: 0 10px;
    overflow-x: auto;
  }

  .workspace {
    flex-direction: column;
  }

  .divider {
    display: none;
  }

  .ed-panel {
    width: 100% !important;
    min-height: 48vh;
  }

  .term-panel {
    min-height: 32vh;
  }

  .toolbar {
    height: auto;
    padding: 10px 14px;
    flex-wrap: wrap;
  }

  .tbright {
    width: 100%;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
  }
}