/* FluidSim — Navier-Stokes 2D sıvı simülatörü · dark neon tema */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #07080f;
  --panel: #0d101c;
  --panel2: #111527;
  --edge: #1d2438;
  --txt: #dfe6ff;
  --muted: #7f8aab;
  --cyan: #00f0ff;
  --pink: #ff2bd6;
  --lime: #39ff88;
  --amber: #ffe14d;
}

html, body {
  height: 100%;
  background: radial-gradient(1200px 700px at 50% -10%, #10162b 0%, var(--bg) 55%);
  color: var(--txt);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  overflow-x: hidden;
}

.stage {
  max-width: min(1180px, 95vw);
  margin: 0 auto;
  padding: 14px 18px 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ── üst bar ─────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0)) , var(--panel);
  border: 1px solid var(--edge);
  border-radius: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-icon {
  font-size: 22px; color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan);
}
.brand h1 {
  font-size: 22px; letter-spacing: 3px; font-weight: 800;
  font-family: "Consolas", "Courier New", monospace;
}
.brand h1 .accent { color: var(--pink); text-shadow: 0 0 14px var(--pink); }
.tagline {
  font-size: 11px; color: var(--muted);
  letter-spacing: 1px; border-left: 1px solid var(--edge); padding-left: 10px;
}

.hud { display: flex; gap: 8px; flex-wrap: wrap; }
.hud-cell {
  display: flex; flex-direction: column; align-items: center;
  min-width: 58px; padding: 6px 10px;
  background: var(--panel2);
  border: 1px solid var(--edge); border-radius: 10px;
}
.hud-label { font-size: 9px; letter-spacing: 1.5px; color: var(--muted); }
.hud-value {
  font-size: 16px; font-weight: 700; color: var(--cyan);
  font-family: "Consolas", monospace;
}
.hud-cell.accent .hud-value { color: var(--pink); }
.hud-cell.accent { border-color: rgba(255,43,214,0.4); box-shadow: 0 0 14px rgba(255,43,214,0.12) inset; }

/* ── çalışma alanı ───────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 1fr 250px;
  gap: 14px;
  flex: 1;
}

.sig-panel {
  position: relative;
  border: 1px solid var(--edge);
  border-radius: 14px;
  overflow-x: hidden;
  overflow-y: auto;
  background: #04050a;
  min-height: 420px;
  /* sağ panelle eşit yükseklik davranışı; içerik uzarsa panel kendi içinde scroll */
  max-height: calc(100vh - 140px);
}
.sig-panel canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 420px;
  max-height: calc(100vh - 140px);
  aspect-ratio: 16 / 10;
  object-fit: fill;
  cursor: crosshair;
  touch-action: none;
  image-rendering: pixelated;
}
.legend {
  position: absolute; left: 10px; bottom: 8px;
  display: flex; gap: 6px; flex-wrap: wrap;
}
.lg-item {
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(7,8,15,0.75);
  border: 1px solid var(--edge);
  padding: 3px 8px; font-size: 11px; color: var(--muted);
  border-radius: 999px;
}
.lg-item kbd {
  background: var(--panel2); color: var(--cyan);
  border: 1px solid var(--edge); border-bottom-width: 2px;
  padding: 0 6px; font-size: 10px; border-radius: 6px;
  font-family: "Consolas", monospace;
}

/* ── sağ panel ──────────────────────── */
.panel {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 14px;
  padding: 14px;
}
.panel-title {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: 1.5px; color: var(--txt);
  margin-bottom: 12px; font-weight: 700;
}
.t-bullet {
  width: 8px; height: 8px; background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  border-radius: 2px;
}
.panel-title.sub { margin-top: 6px; }

.slider-group { margin-bottom: 16px; }
.slider-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 6px;
}
.slider-head label { font-size: 11px; color: var(--muted); letter-spacing: 0.5px; }
.slider-head output {
  font-family: "Consolas", monospace; font-size: 12px; color: var(--lime);
}
input[type="range"] {
  width: 100%; height: 5px;
  -webkit-appearance: none; appearance: none;
  background: var(--panel2);
  border: 1px solid var(--edge);
  border-radius: 999px; outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--cyan);
  border: 2px solid #06121a;
  box-shadow: 0 0 10px rgba(0,240,255,0.6);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: var(--cyan); border: 2px solid #06121a; cursor: pointer;
}

.mode-list { display: flex; flex-direction: column; gap: 6px; }
.ml-item {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 10px;
  border: 1px solid var(--edge);
  border-radius: 9px; font-size: 12px; color: var(--muted);
  cursor: pointer; transition: all 0.15s;
  user-select: none;
}
.ml-item:hover { border-color: var(--cyan); color: var(--txt); }
.ml-item.active {
  border-color: var(--cyan); color: var(--txt);
  background: rgba(0,240,255,0.08);
  box-shadow: 0 0 12px rgba(0,240,255,0.12) inset;
}
.ml-ic { filter: grayscale(0.4); }

.stat-box {
  margin-top: 14px; padding-top: 12px;
  border-top: 1px dashed var(--edge);
  display: flex; flex-direction: column; gap: 6px;
}
.sb-row {
  display: flex; justify-content: space-between;
  font-size: 11px; color: var(--muted);
}
.sb-row b { color: var(--amber); font-family: "Consolas", monospace; font-weight: 600; }

/* ── alt bilgi ───────────────────────── */
.footbar {
  display: flex; justify-content: center; gap: 18px; flex-wrap: wrap;
  padding: 10px; font-size: 11px; color: var(--muted);
  border-top: 1px solid var(--edge);
}
.hint { opacity: 0.85; }

@media (max-width: 760px) {
  .stage { padding: 10px 12px 16px; }
  .workspace { grid-template-columns: 1fr; }
  /* "text-5xl → responsive" karşılığı: ana başlığı küçült, taşmasın */
  .brand h1 { font-size: 18px; font-weight: 800; }
  .brand .brand-icon { font-size: 17px; }
  .tagline { display: none; }
  /* "sabit w/h → responsive" karşılığı: HUD hücrelerini esnet */
  .hud { width: 100%; justify-content: space-between; gap: 6px; }
  .hud-cell { flex: 1; min-width: 0; padding: 5px 4px; }
  .hud-value { font-size: 14px; }
  .sig-panel { min-height: 300px; }
  .sig-panel canvas { min-height: 300px; }
  .legend { left: 6px; right: 6px; bottom: 6px; justify-content: center; }
  .lg-item { font-size: 10px; padding: 2px 6px; }
}

/* orta: 761–980px sıkışmasın */
@media (min-width: 761px) and (max-width: 980px) {
  .workspace { grid-template-columns: 1fr 220px; }
  .brand h1 { font-size: 19px; }
  .hud-value { font-size: 14px; }
}