/* ═══════════════════════════════════════════════
   Starforge Universe — Base (Root, Body, Container, Scrollbar, Responsive)
   ═══════════════════════════════════════════════ */

:root {
    --sf-bg: #060810;
    --sf-bg-panel: rgba(14,17,28,0.92);
    --sf-bg-card: rgba(22,26,40,0.85);
    --sf-bg-hover: rgba(34,40,60,0.8);
    --sf-border: rgba(60,70,100,0.35);
    --sf-border-glow: rgba(79,195,247,0.25);
    --sf-text: #d0d8e8;
    --sf-text-dim: #6a7590;
    --sf-accent: #4fc3f7;
    --sf-accent-dim: #2a7ab0;
    --sf-gold: #f0d060;
    --sf-green: #3ddc84;
    --sf-red: #e74c3c;
    --sf-purple: #bb88ff;
    --sf-font: 'Inter', -apple-system, sans-serif;
    --sf-font-mono: 'Orbitron', monospace;
    --sf-glass: rgba(14,17,28,0.75);
    --sf-glass-border: rgba(80,100,140,0.2);
    --sf-glow-accent: 0 0 20px rgba(79,195,247,0.15);
    --sf-glow-green: 0 0 16px rgba(61,220,132,0.2);
    --sf-glow-gold: 0 0 16px rgba(240,208,96,0.15);
    --sf-radius: 12px;
    --sf-radius-sm: 8px;
}

* { box-sizing: border-box; }

body.sf-universe {
    margin: 0;
    padding: 0;
    background: var(--sf-bg);
    color: var(--sf-text);
    font-family: var(--sf-font);
    overflow: hidden;
    height: 100vh;
}

/* Subtler Starfield Background */
body.sf-universe::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(1.5px 1.5px at 20% 30%, rgba(255,255,255,0.12) 50%, transparent 100%),
        radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,0.08) 50%, transparent 100%),
        radial-gradient(1px 1px at 60% 15%, rgba(79,195,247,0.1) 50%, transparent 100%),
        radial-gradient(1.5px 1.5px at 80% 60%, rgba(187,136,255,0.08) 50%, transparent 100%);
    background-size: 350px 350px, 250px 250px, 200px 200px, 300px 300px;
    pointer-events: none;
    z-index: 0;
}

#game-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1;
}

body.sf-universe.has-dashboard #game-container {
    top: 96px;
}

/* ═══════════════════════════════════════════════
   Scrollbar
   ═══════════════════════════════════════════════ */

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(100,120,160,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(100,120,160,0.5); }

/* ═══════════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════════ */

@media (max-width: 768px) {
    .sf-planet-content {
        grid-template-columns: 1fr;
    }
    .sf-planet-hex-layout {
        grid-template-columns: 1fr;
        height: auto;
    }
    .sf-hex-surface-wrap {
        height: 350px;
    }
    .sf-planet-sidebar {
        max-height: none;
    }
    .sf-system-hex-layout {
        grid-template-columns: 1fr;
    }
    .sf-hex-system-wrap {
        height: 350px;
    }
    .sf-system-view {
        height: auto;
    }
    .sf-dash-resources {
        gap: 4px;
    }
    .sf-res-rate { display: none; }
    .sf-login-title { font-size: 28px; letter-spacing: 4px; }
    .sf-login-box { width: 90vw; }
    .sf-toast-container { right: 8px; left: 8px; max-width: none; }
    .sf-notif-panel { right: 4px; left: 4px; width: auto; }
    .sf-tutorial-modal { padding: 28px 20px 20px; }
    .sf-research-branches { grid-template-columns: 1fr !important; }
}