:root {
  --bg-color: #050a14;
  --accent-color: #00e5ff;
  --accent-dim: rgba(0, 229, 255, 0.15);
  --accent-glow: rgba(0, 229, 255, 0.3);
  --text-primary: #e0faff;
  --font-mono: 'JetBrains Mono', monospace;
  --border-radius: 4px;
}

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

body {
  background: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-mono);
  overflow: hidden;
  height: 100vh;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Blueprint Grid Background */
.blueprint-grid {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image: 
      linear-gradient(rgba(0, 229, 255, 0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(0, 229, 255, 0.05) 1px, transparent 1px);
    background-size: 50px 50px;
    z-index: -2;
    pointer-events: none;
}

.background-svg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* Layout */
.blueprint-viewport {
    position: relative;
    width: 95vw;
    height: 90vh;
    border: 1px solid rgba(0, 229, 255, 0.1);
    background: rgba(0, 20, 40, 0.4);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    padding: 20px;
}

.main-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100%;
    position: relative;
}

/* Unified Arc Wrapper */
.arc-keys-wrapper {
    position: relative;
    width: 100%;
    flex: 1;
    overflow: hidden;
}

.arc-center-hub {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 1px solid var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle, var(--accent-dim) 0%, transparent 70%);
    box-shadow: 0 0 30px var(--accent-glow);
    z-index: 5;
    /* Positioned centrally at the bottom, or centrally with offset - to be handled by JS */
}

.hub-label {
    font-size: 1rem;
    font-weight: 800;
    color: var(--accent-color);
    letter-spacing: 2px;
}

/* Key Nodes */
.key-node {
    position: absolute; /* Crucial for polar coordinate placement */
    border: 1px solid rgba(0, 229, 255, 0.3);
    color: var(--text-primary);
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: rgba(0, 229, 255, 0.03);
    transition: all 0.15s ease-out;
    text-transform: uppercase;
    font-weight: 700;
    user-select: none;
    border-radius: var(--border-radius);
    transform-origin: center center;
}

.key-node:hover {
    background: rgba(0, 229, 255, 0.15);
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-glow);
    z-index: 10;
}

.key-node:active {
    background: var(--accent-color);
    color: var(--bg-color);
}

/* Terminal Output */
.integrated-output {
    height: 120px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(0, 229, 255, 0.3);
    border-radius: var(--border-radius);
    padding: 12px;
    margin-top: 20px;
    position: relative;
    z-index: 20;
}

#outputArea {
    width: 100%;
    height: 100%;
    background: transparent;
    border: none;
    color: var(--accent-color);
    font-family: var(--font-mono);
    font-size: 1rem;
    resize: none;
    outline: none;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-dim) transparent;
}

/* Branding & Info */
.branding {
    position: absolute;
    color: var(--accent-color);
    font-weight: 800;
    letter-spacing: 2px;
    z-index: 20;
}

.branding-top-left { top: 15px; left: 15px; font-size: 0.9rem; }
.branding-bottom-right { bottom: 15px; right: 15px; font-size: 0.7rem; opacity: 0.6; }

.global-controls {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 10px;
    z-index: 20;
}

.control-btn {
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    font-size: 0.75rem;
    padding: 6px 16px;
    cursor: pointer;
    border-radius: 2px;
    transition: 0.2s;
    font-weight: 600;
}

.control-btn:hover {
    background: var(--accent-color);
    color: var(--bg-color);
}

.system-time {
    font-weight: 400;
    margin-left: 10px;
}