.sphere{color:var(--text);font-family:var(--font-body);background:radial-gradient(at 50% 120%,#141a3e 0%,#0a0d22 45%,#040612 100%)}.sphere canvas#stars{pointer-events:none;position:fixed;inset:0}.sphere .viewport{perspective:950px;cursor:grab;position:fixed;inset:0}.sphere .viewport.dragging{cursor:grabbing}.sphere .world{transform-style:preserve-3d;position:absolute;top:50%;left:50%}.sphere .course{background:var(--surface);border:1px solid var(--stroke);border-radius:var(--r-lg);width:220px;height:260px;box-shadow:var(--shadow-sm);cursor:pointer;-webkit-user-select:none;user-select:none;transition:box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base);flex-direction:column;gap:10px;padding:20px;display:flex;position:absolute;top:-130px;left:-110px}.sphere .course:hover{box-shadow:var(--glow-dusk);border-color:var(--stroke-strong)}.sphere .c-icon{border-radius:50%;justify-content:center;align-items:center;width:52px;height:52px;font-size:26px;display:flex}.sphere .c-title{font-family:var(--font-display);font-size:17.5px;font-weight:700;line-height:1.25}.sphere .c-meta{color:var(--text-3);margin-top:auto;font-size:12.5px}.sphere .c-bar{background:var(--surface-3);border-radius:3px;height:5px;overflow:hidden}.sphere .c-bar i{background:var(--dusk);border-radius:3px;height:100%;display:block}.sphere .hud{z-index:10;pointer-events:none;position:fixed}.sphere .hud-top{justify-content:space-between;align-items:center;padding:22px 28px;display:flex;top:0;left:0;right:0}.sphere .wm{font-family:var(--font-display);pointer-events:auto;align-items:center;gap:10px;font-size:20px;font-weight:700;display:flex}.sphere .wm b{color:var(--gold)}.sphere .hint{color:var(--text-3);gap:18px;font-size:13px;display:flex}.sphere .hint i{color:var(--text-2);margin-right:5px}.sphere .hud-bottom{justify-content:center;gap:8px;display:flex;bottom:22px;left:0;right:0}.sphere .zbtn{pointer-events:auto;border:1px solid var(--stroke-strong);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);width:40px;height:40px;color:var(--text-2);cursor:pointer;background:#151936cc;border-radius:50%;justify-content:center;align-items:center;font-size:18px;display:flex}.sphere .zbtn:hover{background:var(--surface-2);color:var(--text)}.sphere .panel{z-index:20;opacity:0;pointer-events:none;background:var(--surface);border:1px solid var(--stroke-strong);border-radius:var(--r-xl);width:360px;box-shadow:var(--shadow-md);transition:opacity var(--dur-slow) var(--ease-dream), transform var(--dur-slow) var(--ease-dream);padding:30px;position:fixed;top:50%;right:34px;transform:translate(30px,-50%)}.sphere .panel.open{opacity:1;pointer-events:auto;transform:translateY(-50%)}.sphere .p-eyebrow{letter-spacing:.09em;text-transform:uppercase;color:var(--gold);margin-bottom:10px;font-size:11px;font-weight:800}.sphere .p-title{font-family:var(--font-display);margin-bottom:8px;font-size:26px;font-weight:700;line-height:1.15}.sphere .p-desc{color:var(--text-2);margin-bottom:18px;font-size:15px;line-height:1.6}.sphere .p-meta{color:var(--text-3);gap:14px;margin-bottom:22px;font-size:13px;display:flex}.sphere .p-meta i{color:var(--text-2);margin-right:5px}.sphere .btn{cursor:pointer;background:var(--primary);height:46px;color:var(--primary-ink);font-family:var(--font-display);border:none;border-radius:999px;align-items:center;gap:8px;padding:0 26px;font-size:15px;font-weight:600;display:inline-flex}.sphere .btn:hover{box-shadow:var(--glow-gold)}.sphere .btn.ghost{color:var(--text-2);border:1px solid var(--stroke-strong);background:0 0;margin-left:8px}