/* ══════════════════════════════════════════════════════════════
   GARGANTUA — Schwarzschild Black Hole Raytracer
   Cinematic HUD stylesheet
   ══════════════════════════════════════════════════════════════ */

:root{
  --amber:  #ffb457;
  --amber-d:#c9822f;
  --cyan:   #7fd8ff;
  --hot:    #ff6b3d;
  --ink:    #05070b;
  --panel:  rgba(7, 10, 15, .58);
  --panel-solid: rgba(6, 8, 12, .92);
  --line:   rgba(255, 255, 255, .10);
  --line-2: rgba(255, 255, 255, .055);
  --txt:    #dfe6f0;
  --dim:    #7e8b9e;
  --dim2:   #55606f;
  --mono:   ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --sans:   -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

*{ box-sizing: border-box; }

html, body{
  margin: 0; padding: 0;
  width: 100%; height: 100%;
  background: #000;
  color: var(--txt);
  font-family: var(--sans);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}

#gl{
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  display: block;
  touch-action: none;
  cursor: grab;
}
#gl:active{ cursor: grabbing; }
body.cinematic #gl{ cursor: default; }

/* ── 通用面板 ───────────────────────────────────────────────── */
.panel{
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  backdrop-filter: blur(14px) saturate(1.15);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  box-shadow: 0 10px 40px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.045);
}

.hud{
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 10;
  opacity: 1;
  transition: opacity .25s ease;
}
.hud.hidden{ opacity: 0; pointer-events: none !important; }
.hud.hidden *{ pointer-events: none !important; }
.hud > *{ pointer-events: auto; }

/* ── 左上：品牌 + 遥测 ─────────────────────────────────────── */
.brand{
  position: absolute; top: 18px; left: 18px;
  padding: 14px 18px 12px;
  min-width: 268px;
}
.title{
  margin: 0;
  font-size: 26px;
  font-weight: 200;
  letter-spacing: .40em;
  line-height: 1;
  color: #fff;
  text-shadow: 0 0 26px rgba(255,180,87,.35), 0 0 60px rgba(255,120,40,.16);
}
.subtitle{
  margin-top: 7px;
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: .20em;
  color: var(--amber);
  opacity: .82;
}
.stats{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px 10px;
  margin-top: 13px;
  padding-top: 11px;
  border-top: 1px solid var(--line-2);
}
.stat{ display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.stat b{
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--cyan);
  letter-spacing: .02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.stat span{
  font-family: var(--mono);
  font-size: 7.5px;
  letter-spacing: .14em;
  color: var(--dim2);
}
.stat span sub{ font-size: 6.5px; }

/* ── 右上：工具栏 ───────────────────────────────────────────── */
.toolbar{
  position: absolute; top: 18px; right: 18px;
  padding: 11px 12px;
  display: flex; flex-direction: column; gap: 8px;
  width: 268px;
}
.tb-row{ display: flex; align-items: center; gap: 9px; }
.tb-label{
  font-family: var(--mono);
  font-size: 8.5px; letter-spacing: .16em;
  color: var(--dim2);
  width: 30px; flex: none;
  text-align: right;
}
.seg{
  display: flex; flex: 1;
  background: rgba(255,255,255,.035);
  border: 1px solid var(--line-2);
  border-radius: 8px;
  overflow: hidden;
}
.seg button{
  flex: 1;
  appearance: none;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line-2);
  color: var(--dim);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .05em;
  padding: 6px 2px;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
}
.seg button:last-child{ border-right: 0; }
.seg button:hover{ background: rgba(255,255,255,.06); color: var(--txt); }
.seg button.on{
  background: linear-gradient(180deg, rgba(255,180,87,.26), rgba(255,180,87,.10));
  color: #ffd9a0;
  box-shadow: inset 0 0 14px rgba(255,180,87,.18);
}
.seg-debug button{ font-size: 9px; padding: 5px 0; }

.tb-toggle{ display: flex; gap: 6px; flex-wrap: wrap; }
.chip{
  flex: 1;
  appearance: none;
  background: rgba(255,255,255,.045);
  border: 1px solid var(--line-2);
  border-radius: 7px;
  color: var(--dim);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .06em;
  padding: 6px 4px;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.chip:hover{ background: rgba(255,255,255,.09); color: var(--txt); }
.chip.on{
  background: linear-gradient(180deg, rgba(127,216,255,.22), rgba(127,216,255,.08));
  border-color: rgba(127,216,255,.35);
  color: #bfeaff;
  box-shadow: 0 0 14px rgba(127,216,255,.16);
}
.chip.small{ flex: 1; font-size: 9px; padding: 5px 4px; }

/* ── 右侧：参数面板 ────────────────────────────────────────── */
.params{
  position: absolute; top: 178px; right: 18px;
  width: 268px;
  max-height: calc(100vh - 200px);
  display: flex; flex-direction: column;
  overflow: hidden;
}
.params header.ph{
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px;
  border-bottom: 1px solid var(--line-2);
  font-family: var(--mono);
  font-size: 9px; letter-spacing: .14em;
  color: var(--dim);
  flex: none;
}
.params header.ph em{
  font-style: normal; color: var(--amber); opacity: .75; margin-left: 4px;
}
.ph-toggle{
  appearance: none; background: rgba(255,255,255,.06);
  border: 1px solid var(--line-2); border-radius: 5px;
  color: var(--dim); width: 20px; height: 18px;
  font-family: var(--mono); font-size: 12px; line-height: 1;
  cursor: pointer; padding: 0;
}
.ph-toggle:hover{ color: #fff; background: rgba(255,255,255,.12); }

.params-body{
  overflow-y: auto;
  overflow-x: hidden;
  padding: 4px 12px 10px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.14) transparent;
}
.params-body::-webkit-scrollbar{ width: 7px; }
.params-body::-webkit-scrollbar-thumb{ background: rgba(255,255,255,.13); border-radius: 4px; }
.params-body::-webkit-scrollbar-track{ background: transparent; }

.params.collapsed .params-body,
.params.collapsed .pf{ display: none; }
.params.collapsed{ max-height: 40px; }

.pgroup{
  font-family: var(--mono);
  font-size: 8px; letter-spacing: .18em;
  color: var(--amber);
  opacity: .7;
  margin: 12px 0 5px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--line-2);
}
.pgroup:first-child{ margin-top: 6px; }

.prow{ margin-bottom: 8px; }
.prow-top{
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 8px; margin-bottom: 4px;
}
.prow-top label{
  font-size: 10.5px;
  color: var(--dim);
  letter-spacing: .02em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.prow-top label i{
  font-style: normal;
  font-family: var(--mono);
  font-size: 8px;
  color: var(--dim2);
  margin-left: 5px;
  letter-spacing: .04em;
}
.prow-top output{
  font-family: var(--mono);
  font-size: 10px;
  color: var(--cyan);
  flex: none;
  font-variant-numeric: tabular-nums;
}

input[type=range]{
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 14px;
  background: transparent;
  cursor: pointer;
  margin: 0; display: block;
}
input[type=range]::-webkit-slider-runnable-track{
  height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, rgba(255,180,87,.55) 0%, rgba(255,180,87,.55) var(--fill,50%), rgba(255,255,255,.10) var(--fill,50%), rgba(255,255,255,.10) 100%);
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance: none; appearance: none;
  width: 11px; height: 11px; border-radius: 50%;
  background: #ffd9a0;
  border: 1px solid rgba(0,0,0,.6);
  margin-top: -4.5px;
  box-shadow: 0 0 10px rgba(255,180,87,.75), 0 1px 3px rgba(0,0,0,.6);
  transition: transform .12s;
}
input[type=range]:hover::-webkit-slider-thumb{ transform: scale(1.22); }
input[type=range]::-moz-range-track{
  height: 3px; border-radius: 2px; background: rgba(255,255,255,.10);
}
input[type=range]::-moz-range-progress{
  height: 3px; border-radius: 2px; background: rgba(255,180,87,.55);
}
input[type=range]::-moz-range-thumb{
  width: 10px; height: 10px; border-radius: 50%; border: 1px solid rgba(0,0,0,.6);
  background: #ffd9a0; box-shadow: 0 0 10px rgba(255,180,87,.7);
}
input[type=range]:focus{ outline: none; }

.params footer.pf{
  display: flex; gap: 6px;
  padding: 8px 12px;
  border-top: 1px solid var(--line-2);
  flex: none;
}

/* ── 左下：快捷键图例 ─────────────────────────────────────── */
.legend{
  position: absolute; left: 18px; bottom: 18px;
  padding: 11px 14px 12px;
  width: 268px;
  opacity: 1;
  transition: opacity .25s;
}
.legend.hidden{ opacity: 0; pointer-events: none; }
.lg-title{
  font-family: var(--mono); font-size: 8px;
  letter-spacing: .18em; color: var(--amber); opacity: .7;
  margin-bottom: 9px;
}
.lg-grid{
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  align-items: center;
}
.lg-grid kbd{
  font-family: var(--mono); font-size: 8.5px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--line-2);
  border-radius: 4px;
  padding: 2px 5px;
  color: var(--txt);
  text-align: center;
  white-space: nowrap;
}
.lg-grid span{ font-size: 10px; color: var(--dim); }

/* ── 底部状态条 ───────────────────────────────────────────── */
.statusbar{
  position: absolute; left: 50%; bottom: 20px;
  transform: translateX(-50%);
  display: flex; align-items: center; gap: 14px;
  padding: 7px 16px;
  background: rgba(7,10,15,.55);
  border: 1px solid var(--line);
  border-radius: 999px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .08em;
  color: var(--dim);
  white-space: nowrap;
  max-width: calc(100vw - 620px);
  overflow: hidden;
}
.statusbar #statusMid{ color: var(--amber); opacity: .9; }
.statusbar #statusRight{ color: var(--cyan); opacity: .8; }
.statusbar sub{ font-size: 7px; }

/* ── Toast ────────────────────────────────────────────────── */
.toast{
  position: absolute; left: 50%; top: 76px;
  transform: translateX(-50%) translateY(-10px);
  padding: 8px 18px;
  background: rgba(8,11,16,.9);
  border: 1px solid rgba(255,180,87,.30);
  border-radius: 999px;
  font-family: var(--mono); font-size: 10px; letter-spacing: .1em;
  color: #ffd9a0;
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease, transform .22s ease;
  box-shadow: 0 0 30px rgba(255,140,40,.16);
  z-index: 40;
}
.toast.show{ opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── 遮罩层 ───────────────────────────────────────────────── */
.overlay{
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at center, #0a0c11 0%, #000 70%);
  transition: opacity .6s ease;
}
.overlay.hidden{ opacity: 0; pointer-events: none; }

.boot-inner{ text-align: center; }
.boot-title{
  font-size: 40px; font-weight: 200; letter-spacing: .5em;
  color: #fff; margin-bottom: 16px;
  text-shadow: 0 0 40px rgba(255,160,60,.4);
  animation: bootPulse 2.6s ease-in-out infinite;
}
@keyframes bootPulse{ 0%,100%{ opacity:.75 } 50%{ opacity:1 } }
.boot-sub{
  font-family: var(--mono); font-size: 10px; letter-spacing: .18em;
  color: var(--dim); margin-bottom: 18px;
}
.boot-bar{
  width: 260px; height: 2px; margin: 0 auto;
  background: rgba(255,255,255,.09); border-radius: 2px; overflow: hidden;
}
.boot-bar i{
  display: block; width: 0%; height: 100%;
  background: linear-gradient(90deg, var(--amber-d), var(--amber), #fff);
  transition: width .3s ease;
  box-shadow: 0 0 12px rgba(255,180,87,.7);
}

.fatal-inner{
  max-width: 640px; padding: 30px 34px;
  border: 1px solid rgba(255,107,61,.35);
  border-radius: 12px;
  background: rgba(14,8,6,.8);
  text-align: left;
}
.fatal-title{
  font-size: 17px; letter-spacing: .12em; color: var(--hot);
  margin-bottom: 14px; font-weight: 400;
}
.fatal-msg{
  font-family: var(--mono); font-size: 10.5px; line-height: 1.6;
  color: #d8c0b4; white-space: pre-wrap; word-break: break-word;
  max-height: 300px; overflow: auto;
  background: rgba(0,0,0,.45); border-radius: 8px; padding: 12px;
  margin: 0 0 14px;
}
.fatal-hint{ font-size: 11px; color: var(--dim); line-height: 1.7; }

/* ── 移动端 / 窄屏 ─────────────────────────────────────────── */
@media (max-width: 900px){
  .brand{ min-width: 0; width: 200px; padding: 10px 12px; }
  .title{ font-size: 17px; letter-spacing: .28em; }
  .subtitle{ font-size: 7px; }
  .stats{ grid-template-columns: repeat(3, 1fr); gap: 5px 6px; }
  .stat b{ font-size: 11px; }
  .toolbar{ width: 200px; padding: 8px; gap: 6px; }
  .params{ width: 200px; top: 168px; max-height: calc(100vh - 250px); }
  .legend{ display: none; }
  .statusbar{ display: none; }
  .tb-label{ display: none; }
}
@media (max-width: 560px){
  .brand{ width: 156px; }
  .stats{ grid-template-columns: repeat(2, 1fr); }
  .toolbar{ width: 168px; }
  .params{ width: 168px; top: 176px; }
  .seg button{ font-size: 8.5px; }
  .params.collapsed{ max-height: 38px; }
}

@media (prefers-reduced-motion: reduce){
  .boot-title{ animation: none; }
}