/* =============================================================
   ORBITAL SIMULATOR 3D — Stylesheet
   Theme: dark space UI, cyan accent (#0ff), monospace font
   ============================================================= */

/* ── Reset & Base ──────────────────────────────────────────── */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: #000;
  overflow: hidden;
  font-family: 'Courier New', monospace;
  color: #0ff;
}

/* ── Left Sidebar Panel ────────────────────────────────────── */
#ui {
  position: fixed;
  top: 0;
  left: 0;
  width: 275px;
  height: 100vh;
  background: rgba(0, 8, 18, .93);
  border-right: 1px solid #0ff3;
  padding: 12px;
  overflow-y: auto;
  z-index: 10;
}

h1 {
  font-size: 12px;
  letter-spacing: 3px;
  margin-bottom: 12px;
  padding-bottom: 7px;
  border-bottom: 1px solid #0ff3;
}

/* Section blocks inside the sidebar */
.sec {
  margin-bottom: 11px;
}

.sec-title {
  font-size: 10px;
  color: #0ffa;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

/* ── Form Controls ─────────────────────────────────────────── */
label {
  font-size: 11px;
  color: #8cf;
  display: block;
  margin-bottom: 2px;
}

/* Floating right-side value readout next to a label */
.val {
  float: right;
  color: #0ff;
}

input[type=range] {
  width: 100%;
  accent-color: #0ff;
  margin-bottom: 6px;
  cursor: pointer;
}

input[type=color] {
  width: 100%;
  height: 24px;
  border: none;
  background: none;
  cursor: pointer;
  margin-bottom: 6px;
}

/* ── Buttons ───────────────────────────────────────────────── */
button {
  background: transparent;
  border: 1px solid #0ff4;
  color: #0ff;
  padding: 4px 8px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all .15s;
  margin-bottom: 4px;
  width: 100%;
}

button:hover {
  background: #0ff2;
  border-color: #0ff;
}

button:active {
  animation: btnRipple 0.3s ease-out;
  transform: scale(0.97);
}

/* Active / toggled-on state */
button.on {
  background: #0ff3;
  border-color: #0ff;
  box-shadow: 0 0 8px #0ff4;
}

/* Danger / destructive action (red) */
button.red {
  border-color: #f004;
  color: #f77;
}
button.red:hover {
  background: #f002;
  border-color: #f77;
}

/* Time-reversal button (amber) */
button.rev {
  border-color: #f804;
  color: #fa0;
}
button.rev.on {
  background: #f803;
  border-color: #fa0;
  box-shadow: 0 0 8px #f804;
}

/* Positive action (green) */
button.grn {
  border-color: #0f04;
  color: #0f8;
}
button.grn.on {
  background: #0f03;
  border-color: #0f8;
  box-shadow: 0 0 8px #0f04;
}

/* Horizontal pair of equal-width buttons */
.row {
  display: flex;
  gap: 4px;
}
.row button {
  flex: 1;
}

/* ── Status / warning text ─────────────────────────────────── */
#status {
  font-size: 10px;
  color: #ff0;
  min-height: 16px;
  margin-top: 4px;
  transition: color 0.2s;
}

/* ── Body List ─────────────────────────────────────────────── */
#body-list {
  max-height: 130px;
  overflow-y: auto;
}

.bitem {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 5px;
  margin-bottom: 3px;
  border: 1px solid #fff1;
  border-radius: 2px;
  font-size: 10px;
  animation: bitemIn 0.22s ease both;
}

.bitem:nth-child(1)  { animation-delay: 0ms;  }
.bitem:nth-child(2)  { animation-delay: 30ms; }
.bitem:nth-child(3)  { animation-delay: 60ms; }
.bitem:nth-child(4)  { animation-delay: 90ms; }
.bitem:nth-child(5)  { animation-delay: 120ms;}
.bitem:nth-child(6)  { animation-delay: 150ms;}
.bitem:nth-child(n+7){ animation-delay: 180ms;}

/* Currently selected body */
.bitem.sel {
  border-color: #ff04;
  background: #ff01;
}

/* Multi-selected body (cyan tint) */
.bitem.multi {
  border-color: #0ff5;
  background: #0ff1;
}

/* Multi-select action bar */
#multiselect-bar {
  background: #001a22;
  border: 1px solid #0ff4;
  border-radius: 3px;
  padding: 5px 7px;
  margin-bottom: 6px;
  font-size: 10px;
  color: #0ff;
}

/* Colour dot representing the body */
.bdot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.bname {
  cursor: pointer;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.bname:hover {
  color: #ff0;
  text-decoration: underline dotted;
}

/* Tiny inline buttons (THR / FOL / DEL) inside each body row */
.bitem .bb {
  width: auto;
  padding: 1px 4px;
  font-size: 9px;
  margin: 0;
}
.bitem .bb.del { border-color: #f004; color: #f77; }
.bitem .bb.thr { border-color: #fa04; color: #fa0; }
.bitem .bb.fol { border-color: #0f04; color: #0f8; }

/* ── Thrust Panel ──────────────────────────────────────────── */
#thrust-panel {
  background: #1a0800;
  border: 1px solid #fa04;
  border-radius: 3px;
  padding: 7px;
  margin-bottom: 8px;
  display: none;
}

#thrust-panel .tpn {
  font-size: 11px;
  color: #fa0;
  margin-bottom: 5px;
}

#thrust-keys {
  font-size: 10px;
  color: #fc8;
  line-height: 1.8;
}

/* ── Recorder Panel ────────────────────────────────────────── */
#rec-panel {
  background: #001a00;
  border: 1px solid #0f04;
  border-radius: 3px;
  padding: 7px;
  margin-top: 6px;
  display: none;
}

#rec-panel .rpn {
  font-size: 10px;
  color: #0f8;
  margin-bottom: 5px;
}

#pbSlider {
  width: 100%;
  accent-color: #0f8;
  margin: 4px 0;
}

/* ── Top Bar ───────────────────────────────────────────────── */
#topbar {
  position: fixed;
  top: 0;
  left: 275px;
  right: 0;
  height: 44px;
  background: rgba(0, 8, 18, .93);
  border-bottom: 1px solid #0ff3;
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 8px;
  z-index: 10;
}

#topbar button {
  width: auto;
  margin: 0;
  padding: 4px 12px;
  font-size: 11px;
}

#simtime {
  font-size: 11px;
  color: #0ffa;
}

#hint {
  font-size: 10px;
  color: #fff3;
  margin-left: auto;
}

/* ── Hover Tooltip ─────────────────────────────────────────── */
#hover-tip {
  position: fixed;
  pointer-events: none;
  z-index: 20;
  background: rgba(0, 8, 18, .93);
  border: 1px solid #0ff5;
  padding: 5px 10px;
  font-size: 11px;
  line-height: 1.7;
  display: none;
  white-space: nowrap;
}
#hover-tip .hn { color: #fff; font-size: 12px; font-weight: bold; }
#hover-tip .ht { color: #0ffa; font-size: 10px; }
#hover-tip .hv { color: #8cf; font-size: 10px; }

/* ── Body Preset Tile Grid ─────────────────────────────────── */
#presetGrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  margin-bottom: 8px;
}

.ptile {
  background: #0a1a2a;
  border: 1px solid #0ff3;
  border-radius: 3px;
  padding: 4px 2px;
  cursor: pointer;
  text-align: center;
  font-size: 9px;
  color: #8cf;
  transition: background .15s, border-color .15s;
}
.ptile:hover  { background: #0d2233; border-color: #0ff9; }
.ptile.sel    { background: #002233; border-color: #0ff; color: #fff; }
.ptile .pe    { font-size: 14px; display: block; line-height: 1.4; }
.ptile .pn    { display: block; font-size: 8px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── Stats Overlay (bottom-right) ──────────────────────────── */
#overlay {
  position: fixed;
  bottom: 10px;
  right: 10px;
  font-size: 10px;
  color: #fff4;
  text-align: right;
  line-height: 1.8;
  z-index: 10;
  pointer-events: none;
}

/* ── Persistent World-Space Labels (Origin / CoM) ─────────── */
.world-label {
  position: fixed;
  pointer-events: none;
  z-index: 5;
  font-family: 'Courier New', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: #ffffff88;
  text-shadow: 0 0 6px #000, 0 0 12px #000;
  transform: translate(-50%, -180%);
  white-space: nowrap;
}

#label-com {
  color: #0ff9;
}

/* ── Floating Body Labels ──────────────────────────────────── */
#labels {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
}

.blabel {
  position: absolute;
  transform: translate(-50%, -100%);
  font-size: 11px;
  font-family: 'Courier New', monospace;
  text-shadow: 0 0 4px #000, 0 0 8px #000;
  white-space: nowrap;
}

/* =============================================================
   ANIMATIONS
   ============================================================= */

@keyframes tutOverlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes tutBoxIn {
  from { opacity: 0; transform: scale(0.88) translateY(28px); }
  to   { opacity: 1; transform: scale(1)    translateY(0);    }
}

@keyframes tabPageIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0);   }
}

@keyframes bitemIn {
  from { opacity: 0; transform: translateX(-12px); }
  to   { opacity: 1; transform: translateX(0);     }
}

@keyframes statusPop {
  0%   { transform: scale(1);    color: #ff0; }
  40%  { transform: scale(1.06); color: #fff; }
  100% { transform: scale(1);    color: #ff0; }
}

@keyframes btnRipple {
  from { box-shadow: 0 0 0 0 #0ff5; }
  to   { box-shadow: 0 0 0 10px #0ff0; }
}

/* =============================================================
   TUTORIAL MODAL
   ============================================================= */

/* Semi-transparent backdrop */
#tut-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .82);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: tutOverlayIn 0.35s ease both;
}

/* Modal box */
#tut-box {
  background: #000d1a;
  border: 1px solid #0ff6;
  border-radius: 6px;
  width: 700px;
  max-width: 96vw;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  font-family: 'Courier New', monospace;
  box-shadow: 0 0 40px #0ff2;
  animation: tutBoxIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) both;
}

#tut-header {
  padding: 16px 20px 10px;
  border-bottom: 1px solid #0ff2;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#tut-header h2 {
  font-size: 14px;
  letter-spacing: 3px;
  color: #0ff;
}

/* Tab strip */
#tut-tabs {
  display: flex;
  gap: 4px;
  padding: 10px 20px 0;
  border-bottom: 1px solid #0ff2;
}

.ttab {
  background: transparent;
  border: 1px solid #0ff3;
  border-bottom: none;
  color: #0ff8;
  padding: 5px 12px;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 3px 3px 0 0;
  transition: background .15s;
}
.ttab:hover { background: #0ff1; }
.ttab.on    { background: #0ff2; border-color: #0ff; color: #fff; }

/* Scrollable content area */
#tut-body {
  padding: 18px 20px;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}

.tpage {
  animation: tabPageIn 0.25s ease both;
}

#tut-body h3 {
  font-size: 11px;
  letter-spacing: 2px;
  color: #0ff;
  text-transform: uppercase;
  margin: 14px 0 7px;
  border-bottom: 1px solid #0ff2;
  padding-bottom: 4px;
}
#tut-body h3:first-child { margin-top: 0; }

#tut-body p {
  font-size: 11px;
  color: #8cf;
  line-height: 1.75;
  margin-bottom: 6px;
}

/* Keyboard shortcut chips row */
#tut-body .krow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}
#tut-body .kb {
  display: inline-block;
  background: #0a1a2a;
  border: 1px solid #0ff5;
  border-radius: 3px;
  padding: 2px 7px;
  font-size: 10px;
  color: #fff;
  white-space: nowrap;
}
#tut-body .kb span {
  color: #0ffa;
  font-size: 9px;
  margin-left: 5px;
}

/* Reference tables */
#tut-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
  margin-bottom: 8px;
}
#tut-body td {
  padding: 4px 8px;
  border-bottom: 1px solid #0ff1;
  color: #8cf;
  vertical-align: top;
}
#tut-body td:first-child {
  color: #0ff;
  white-space: nowrap;
  width: 120px;
}

/* Footer with action buttons */
#tut-footer {
  padding: 12px 20px;
  border-top: 1px solid #0ff2;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
#tut-footer button {
  background: transparent;
  border: 1px solid #0ff4;
  color: #0ff;
  padding: 6px 18px;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1px;
  cursor: pointer;
  border-radius: 3px;
}
#tut-footer button:hover        { background: #0ff2; border-color: #0ff; }
#tut-footer button.pri          { border-color: #0ff; background: #0ff2; color: #fff; }
#tut-footer button.pri:hover    { background: #0ff4; }