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

:root {
  --bg:        #0d0e11;
  --bg2:       #12141a;
  --bg3:       #1a1d26;
  --border:    #252830;
  --border2:   #2e3340;
  --teal:      #00c8b4;
  --teal-dim:  #009986;
  --cyan:      #00ccff;
  --accent:    #0af0d8;
  --text:      #c8cdd8;
  --text-dim:  #6a7080;
  --text-bright:#e8ecf4;
  --red:       #ff4500;
  --green:     #00ee77;
  --yellow:    #ffdd00;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --panel-w:   290px;
  --panel-r:   270px;
}

html, body { width: 100%; height: 100%; overflow: hidden; background: var(--bg); }

/* ── Layout ─────────────────────────────────────────── */
#app {
  display: flex;
  width: 100vw;
  height: 100vh;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  overflow: hidden;
}

/* ── Left Panel ─────────────────────────────────────── */
#left-panel {
  width: var(--panel-w);
  min-width: var(--panel-w);
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

#panel-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
}
.logo-mark { font-size: 26px; color: var(--teal); line-height: 1; filter: drop-shadow(0 0 6px var(--teal)); }
.panel-title { font-size: 13px; font-weight: 700; letter-spacing: 0.12em; color: var(--text-bright); text-transform: uppercase; }
.panel-subtitle { font-size: 11px; color: var(--teal-dim); letter-spacing: 0.08em; margin-top: 2px; }

.section-label { font-size: 11px; font-weight: 700; letter-spacing: 0.15em; color: var(--text-dim); text-transform: uppercase; padding: 14px 16px 8px; }

select, input[type="number"] {
  width: calc(100% - 32px); margin: 0 16px; background: var(--bg3);
  border: 1px solid var(--border2); border-radius: 4px; color: var(--text-bright);
  font-family: var(--font-mono); font-size: 12px; padding: 8px 10px;
  outline: none; appearance: none; -webkit-appearance: none; cursor: pointer; transition: border-color 0.2s;
}
select:hover, input[type="number"]:hover { border-color: var(--teal-dim); }
select:focus, input[type="number"]:focus { border-color: var(--teal); }
select { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%2300c8b4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 10px center; padding-right: 30px; }

/* ── Dynamic Params ─────────────────────────────────── */
#dynamic-params { flex: 1; overflow-y: auto; overflow-x: hidden; padding-bottom: 12px; transition: opacity 0.2s; }
#dynamic-params::-webkit-scrollbar { width: 5px; }
#dynamic-params::-webkit-scrollbar-track { background: transparent; }
#dynamic-params::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

.param-row { padding: 8px 16px 4px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--text-dim); letter-spacing: 0.06em; text-transform: uppercase; }
.checkbox-row input[type="checkbox"] { width: auto; margin: 0; }
.param-label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-dim); letter-spacing: 0.06em; margin-bottom: 6px; text-transform: uppercase; }
.param-label span { color: var(--teal); font-size: 11px; }

input[type="range"] { width: 100%; height: 5px; appearance: none; -webkit-appearance: none; background: var(--border2); border-radius: 3px; outline: none; cursor: pointer; }
input[type="range"]::-webkit-slider-thumb { appearance: none; width: 14px; height: 14px; border-radius: 50%; background: var(--teal); cursor: pointer; transition: transform 0.15s, box-shadow 0.15s; }
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.3); box-shadow: 0 0 8px var(--teal); }

.param-row.full input[type="number"] { width: 100%; margin: 0; }
.joint-row { padding: 6px 16px; }
.joint-label { display: flex; justify-content: space-between; font-size: 11px; color: var(--text-dim); margin-bottom: 5px; }
.joint-label .jval { color: var(--cyan); }

/* Property panel */
.prop-panel { border-top: 1px solid var(--border); margin-top: 10px; }
.prop-header { padding: 10px 16px 6px; font-size: 11px; letter-spacing: 0.1em; color: var(--yellow); text-transform: uppercase; font-weight: 700; }

.btn-delete {
  display: block; width: calc(100% - 32px); margin: 10px 16px 6px; padding: 8px;
  background: transparent; border: 1px solid #cc2200; color: #ff4433;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em;
  cursor: pointer; border-radius: 4px; text-transform: uppercase; transition: background 0.2s, color 0.2s;
}
.btn-delete:hover { background: #cc2200; color: #fff; }

/* ── Operation Buttons ──────────────────────────────── */
#op-buttons { padding: 14px 16px; border-top: 1px solid var(--border); display: grid; grid-template-columns: 1fr 1fr; gap: 8px; background: var(--bg2); }

button {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.05em;
  font-weight: 700; text-transform: uppercase; cursor: pointer; border-radius: 4px;
  padding: 10px 8px; transition: all 0.18s; border: 1px solid transparent;
}
.btn-primary {
  background: var(--teal);
  color: var(--bg);
  border-color: var(--teal);
}
.btn-primary:hover:not(:disabled) { background: var(--accent); box-shadow: 0 0 12px var(--teal); }
.btn-primary:disabled { opacity: 0.35; cursor: default; box-shadow: none; }

.btn-secondary { background: transparent; color: var(--text); border-color: var(--border2); }
.btn-secondary:hover:not(:disabled) { border-color: var(--teal-dim); color: var(--teal); }
.btn-secondary:disabled { opacity: 0.35; cursor: default; }

/* ── Viewport ───────────────────────────────────────── */
#viewport { flex: 1; position: relative; background: var(--bg); overflow: hidden; }
#three-canvas { display: block; width: 100%; height: 100%; }
#viewport-overlay { position: absolute; top: 0; left: 0; right: 0; display: flex; justify-content: space-between; align-items: center; padding: 12px 16px; pointer-events: none; z-index: 5; }
#viewport-label, #mode-indicator { font-size: 10px; letter-spacing: 0.2em; color: var(--text-dim); text-transform: uppercase; }
#mode-display { color: var(--teal); }

/* Loading screen */
#loading-screen { position: absolute; inset: 0; background: var(--bg); display: flex; flex-direction: column; align-items: center; justify-content: center; z-index: 100; gap: 18px; transition: opacity 0.6s; }
#loading-screen.hidden { opacity: 0; pointer-events: none; }
.load-spinner { width: 40px; height: 40px; border: 2px solid var(--border2); border-top-color: var(--teal); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.load-text { font-size: 13px; letter-spacing: 0.2em; color: var(--teal); text-transform: uppercase; }
.load-sub { font-size: 11px; letter-spacing: 0.08em; color: var(--text-dim); }

/* ── Right Panel ────────────────────────────────────── */
#right-panel { width: var(--panel-r); min-width: var(--panel-r); background: var(--bg2); border-left: 1px solid var(--border); display: flex; flex-direction: column; overflow: hidden; }
#metrics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.metric-card { background: var(--bg2); padding: 12px 12px 10px; text-align: center; }
.metric-value { font-size: 18px; font-weight: 700; color: var(--teal); letter-spacing: 0.04em; line-height: 1; margin-bottom: 6px; transition: color 0.3s; }
.metric-label { font-size: 9px; letter-spacing: 0.15em; color: var(--text-dim); text-transform: uppercase; }
#console-log { flex: 1; overflow-y: auto; overflow-x: hidden; padding: 10px 14px; background: var(--bg); border-top: 1px solid var(--border); }
#console-log::-webkit-scrollbar { width: 5px; }
#console-log::-webkit-scrollbar-track { background: transparent; }
#console-log::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
.log-entry { display: flex; gap: 8px; margin-bottom: 6px; line-height: 1.5; font-size: 11px; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(2px); } to { opacity: 1; transform: none; } }
.log-time { color: var(--text-dim); flex-shrink: 0; }
.log-msg  { color: var(--text); word-break: break-word; }
.log-entry.info  .log-msg { color: var(--text); }
.log-entry.ok    .log-msg { color: var(--green); }
.log-entry.warn  .log-msg { color: var(--yellow); }
.log-entry.error .log-msg { color: #ff4444; }
.log-entry.plan  .log-msg { color: var(--cyan); }

/* ── Responsive Layout ──────────────────────────────── */
@media screen and (max-width: 950px), screen and (orientation: portrait) {
  #app {
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
  }
  #viewport {
    width: 100%;
    height: 50vh;
    min-height: 380px;
    flex: none;
    order: 1; /* Viewport at top */
    border-bottom: 1px solid var(--border);
  }
  #left-panel {
    width: 100%;
    min-width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex: none;
    order: 2; /* Controls below viewport */
  }
  #right-panel {
    width: 100%;
    min-width: 100%;
    border-left: none;
    flex: none;
    order: 3; /* Metrics/Log at bottom */
  }
  #dynamic-params {
    overflow-y: visible; /* Let it expand naturally in the scrolling page */
  }
  #console-log {
    height: 250px;
    flex: none;
  }
}

/* GitHub Link Styling */
.github-link {
  /* Pushes the icon to the far right using flexbox */
  margin-left: auto; 
  color: var(--text-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s ease, transform 0.2s ease;
}

.github-link:hover {
  color: var(--teal);
  transform: scale(1.1);
  filter: drop-shadow(0 0 6px var(--teal-dim));
}

/* ── Responsive Layout ──────────────────────────────── */
@media screen and (max-width: 950px), screen and (orientation: portrait) {
  #app {
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
  }
  #viewport {
    width: 100%;
    height: 50vh;
    min-height: 380px;
    flex: none;
    order: 1; /* Viewport at top */
    border-bottom: 1px solid var(--border);
  }
  #left-panel {
    width: 100%;
    min-width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex: none;
    order: 2; /* Controls below viewport */
  }
  #right-panel {
    width: 100%;
    min-width: 100%;
    border-left: none;
    flex: none;
    order: 3; /* Metrics/Log at bottom */
    
    /* NEW: Add space to the very bottom so the sticky buttons don't block the last logs */
    padding-bottom: 120px; 
  }
  #dynamic-params {
    overflow-y: visible; /* Let it expand naturally in the scrolling page */
  }
  #console-log {
    height: 250px;
    flex: none;
  }

  /* NEW: Sticky Operation Buttons */
  #op-buttons {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    box-shadow: 0 -8px 24px rgba(0,0,0,0.6);
    /* Safe-area inset prevents modern iOS/Android home bars from overlapping the bottom buttons */
    padding-bottom: max(14px, env(safe-area-inset-bottom)); 
  }
}